阅读说明：本技术 一种混合动力液压模块试验平台气动系统及其搭建方法 (Pneumatic system of hybrid power hydraulic module test platform and construction method thereof ) 是由 朱留存 陈明友 王骥月 罗俊琦 邓浩锋 武宏伟 郑晓东 李全芳 刘道鹏 于 2021-09-15 设计创作，主要内容包括：本发明提供一种混合动力液压模块试验平台气动系统的搭建方法,包括以下步骤：构造气动气路：所述气动气路包括夹紧气动气路、定位气动气路、翻转气动气路及排残油拨叉气动气路,夹紧气动气路包括第一电磁换向阀、第一调速阀及夹紧气缸,定位气动气路包括第二电磁换向阀、第二调速阀及定位气缸,翻转气动气路包括第三电磁换向阀、第三调速阀及翻转气缸；排残油拨叉气动气路包括第四电磁换向阀、第四调速阀及排残油拨叉气缸；对构成夹紧气动气路、定位气动气路、翻转气动气路及排残油拨叉气动气路的元件进行型号选择。其能够利用气动系统对混合动力液压模块试验平台提供夹紧、翻转、定位、排残油的功能,进而方便对混合动力进行研究。(The invention provides a method for building a pneumatic system of a hybrid power hydraulic module test platform, which comprises the following steps: constructing a pneumatic air path: the pneumatic gas circuit comprises a clamping pneumatic gas circuit, a positioning pneumatic gas circuit, a turning pneumatic gas circuit and a residual oil discharging shifting fork pneumatic gas circuit, the clamping pneumatic gas circuit comprises a first electromagnetic directional valve, a first speed regulating valve and a clamping cylinder, the positioning pneumatic gas circuit comprises a second electromagnetic directional valve, a second speed regulating valve and a positioning cylinder, and the turning pneumatic gas circuit comprises a third electromagnetic directional valve, a third speed regulating valve and a turning cylinder; the residual oil discharging shifting fork pneumatic gas circuit comprises a fourth electromagnetic reversing valve, a fourth speed regulating valve and a residual oil discharging shifting fork cylinder; and selecting the types of elements forming a clamping pneumatic air circuit, a positioning pneumatic air circuit, a turning pneumatic air circuit and a residual oil discharging shifting fork pneumatic air circuit. The pneumatic system can be used for providing functions of clamping, overturning, positioning and residual oil discharging for the hybrid power hydraulic module test platform, and further research on hybrid power is facilitated.)

1. A method for building a pneumatic system of a hybrid power hydraulic module test platform is characterized by comprising the following steps:

constructing a pneumatic air path: the pneumatic gas circuit comprises a clamping pneumatic gas circuit, a positioning pneumatic gas circuit, a turning pneumatic gas circuit and a residual oil discharging shifting fork pneumatic gas circuit, wherein,

the clamping pneumatic air circuit comprises a first electromagnetic directional valve (10), a first speed regulating valve (11) and a clamping cylinder (12), an air inlet of the first electromagnetic directional valve (10) is used for being connected with an air source, a first working port of the first electromagnetic directional valve (10) is connected with a first air port of the clamping cylinder (12), and a second air port of the clamping cylinder (12) is connected with a second working port of the first electromagnetic directional valve (10) through the first speed regulating valve (11);

the positioning pneumatic air circuit comprises a second electromagnetic directional valve (20), a second speed regulating valve (21) and a positioning air cylinder (22), an air inlet of the second electromagnetic directional valve (20) is used for being connected with an air source, a first working port of the second electromagnetic directional valve (20) is connected with a first air port of the positioning air cylinder (22), and a second air port of the positioning air cylinder (22) is connected with a second working port of the second electromagnetic directional valve (20) through the second speed regulating valve (21);

the overturning pneumatic air path comprises a third electromagnetic directional valve (30), a third speed regulating valve (31) and an overturning air cylinder (32), an air inlet of the third electromagnetic directional valve (30) is used for being connected with an air source, a first working port of the third electromagnetic directional valve (30) is connected with a first air port of the overturning air cylinder (32), and a second air port of the overturning air cylinder (32) is connected with a second working port of the third electromagnetic directional valve (30) through the third speed regulating valve (31);

the residual oil discharge shifting fork pneumatic gas circuit comprises a fourth electromagnetic directional valve (40), a fourth speed regulating valve (41) and a residual oil discharge shifting fork cylinder (43), wherein a gas inlet of the fourth electromagnetic directional valve (40) is used for being connected with a gas source, a first working port of the fourth electromagnetic directional valve (40) is connected with a first gas port of the residual oil discharge shifting fork cylinder (43), and a second gas port of the residual oil discharge shifting fork cylinder (43) is connected with a second working port of the fourth electromagnetic directional valve (40) through the fourth speed regulating valve (41);

and selecting the types of elements forming a clamping pneumatic air circuit, a positioning pneumatic air circuit, a turning pneumatic air circuit and a residual oil discharging shifting fork pneumatic air circuit.

2. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 1, characterized by comprising the following steps: the clamping cylinder (12) selects a cylinder with the model number of CDG1UA32-50-M9B, the positioning cylinder (22) selects a cylinder with the model number of CDQ2B16-20D-M9B, the overturning cylinder (32) selects a cylinder with the model number of CDG1UA32-100-M9B, and the residual oil discharging fork cylinder (43) selects a cylinder with the model number of CDQ2B32-20 DZ-M9B.

3. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 2, characterized by comprising the following steps: the model selection method of the clamping cylinder (12), the positioning cylinder (22), the overturning cylinder (32) and the residual oil discharging shifting fork cylinder (43) comprises the following steps: determining the load rate of the air cylinder according to the preset working state of the air cylinder; determining the working pressure and the output force of the cylinder; calculating according to the output force, the load rate and the working pressure of the cylinder to obtain the inner diameter of the cylinder; and selecting the air cylinder of the corresponding type meeting the requirement of the inner diameter of the air cylinder according to the task requirement to be finished by the air cylinder.

4. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 3, characterized by comprising the following steps: the cylinder bore diameter D is obtained by calculation according to the following formula:

in the formula: f, outputting force by a cylinder; p-working pressure; eta-load rate.

5. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 3, characterized by comprising the following steps: the model selection method of the first speed regulating valve (11), the second speed regulating valve (21), the third speed regulating valve (31) and the fourth speed regulating valve (41) comprises the following steps: the instantaneous flow of the cylinder is obtained through calculation according to the inner diameter of the cylinder, the maximum movement speed of the cylinder and the working pressure, the flow of the corresponding speed regulating valve is determined according to the instantaneous flow of the cylinder, and the model of the corresponding speed regulating valve is selected according to the flow of the speed regulating valve.

6. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 5, characterized by comprising the following steps: the instantaneous flow Q of the cylinder is obtained by calculation according to the following formula:

wherein, D-cylinder bore, unit: mm; vmax-cylinder maximum movement speed, position: mm/s; p-working pressure of cylinder, unit: 10⁵Pa。

7. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 1, characterized by comprising the following steps: the model selection of the speed regulating valve is as follows: the first speed regulating valve (11) and the third speed regulating valve (31) are speed regulating valves with the model number of AS2201F-01-06S, the second speed regulating valve (21) is a speed regulating valve with the model number of AS1201F-M5-04, and the fourth speed regulating valve (41) is a speed regulating valve with the model number of AS 2201F-01-08S.

8. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 1, characterized by comprising the following steps: the model selection method of the first electromagnetic directional valve (10), the second electromagnetic directional valve (20), the third electromagnetic directional valve (30) and the fourth electromagnetic directional valve (40) comprises the following steps: and calculating to obtain the maximum air consumption of the air cylinder according to the inner diameter of the air cylinder, the maximum movement speed of the air cylinder and the working pressure of the corresponding air cylinder, and selecting the model of the corresponding electromagnetic directional valve according to the maximum air consumption of the air cylinder.

9. The method for building the pneumatic system of the hybrid hydraulic module test platform according to claim 8, characterized by comprising the following steps: calculating and obtaining the maximum gas consumption G of the cylinder according to the following formula:

G＝0.046D²V_max(p +0.102), wherein D-cylinder bore, unit: mm; vmax-cylinder maximum movement speed, position: mm/s; p-working pressure of cylinder, unit: MPa.

10. A pneumatic system of a hybrid power hydraulic module test platform is characterized by comprising a clamping pneumatic air passage, a positioning pneumatic air passage, a turning pneumatic air passage and a residual oil discharging shifting fork pneumatic air passage, wherein,

the clamping pneumatic air circuit comprises a first electromagnetic directional valve (10), a first speed regulating valve (11) and a clamping cylinder (12), an air inlet of the first electromagnetic directional valve (10) is used for being connected with an air source, a first working port of the first electromagnetic directional valve (10) is connected with a first air port of the clamping cylinder (12), and a second air port of the clamping cylinder (12) is connected with a second working port of the first electromagnetic directional valve (10) through the first speed regulating valve (11);

the positioning pneumatic air circuit comprises a second electromagnetic directional valve (20), a second speed regulating valve (21) and a positioning air cylinder (22), an air inlet of the second electromagnetic directional valve (20) is used for being connected with an air source, a first working port of the second electromagnetic directional valve (20) is connected with a first air port of the positioning air cylinder (22), and a second air port of the positioning air cylinder (22) is connected with a second working port of the second electromagnetic directional valve (20) through the second speed regulating valve (21);

the overturning pneumatic air path comprises a third electromagnetic directional valve (30), a third speed regulating valve (31) and an overturning air cylinder (32), an air inlet of the third electromagnetic directional valve (30) is used for being connected with an air source, a first working port of the third electromagnetic directional valve (30) is connected with a first air port of the overturning air cylinder (32), and a second air port of the overturning air cylinder (32) is connected with a second working port of the third electromagnetic directional valve (30) through the third speed regulating valve (31);

the pneumatic gas circuit of the residual oil discharging shifting fork comprises a fourth electromagnetic directional valve (40), a fourth speed regulating valve (41) and a residual oil discharging shifting fork cylinder (43), a gas inlet of the fourth electromagnetic directional valve (40) is used for being connected with a gas source, a first working port of the fourth electromagnetic directional valve (40) is connected with a first gas port of the residual oil discharging shifting fork cylinder (43), and a second gas port of the residual oil discharging shifting fork cylinder (43) is connected with a second working port of the fourth electromagnetic directional valve (40) through the fourth speed regulating valve (41).

Technical Field

The invention relates to an experiment platform, in particular to a pneumatic system of a hybrid power hydraulic module experiment platform and a construction method thereof.

Background

With the rapid increase of the world population and the increase of the economy of each country, people have an increasing demand on energy, and the non-regenerability of petrochemical energy causes the continuous reduction of the petrochemical energy around the world, so that the energy generated by the petrochemical energy is insufficient to meet the demand of people on energy. According to the current consumption speed of petrochemical energy, the international energy prediction results show that the years for the petrochemical energy (petroleum, coal and natural gas) on the earth to be exploited are only 40 years, 220 years and 60 years respectively. The problems of energy shortage and environmental pollution have prompted research and development of new energy and environmental products in various countries.

Energy consumption of vehicles accounts for 40% of the total energy consumption of the world, while energy consumption of automobiles accounts for about 1/4, and with the development of high-tech technologies, under the pressure of energy conservation and environmental protection, new energy automobiles and energy-saving and environment-friendly automobiles are researched and developed by various countries. China is a world major country for automobile production, according to the forecast of the ministry of industry of the development and research center, the fuel consumption of automobiles is nearly half of the total petroleum demand in China, and the energy consumption is getting larger, so that the newly increased petroleum demand in China is more and more dependent on import, and the problem of energy shortage is more and more serious.

Under the pressure of energy shortage and environmental pollution, the research of new energy needs to be carried out on schedule, and the hybrid power as a leading sheep plays a leading role in the aspect of new energy, for example, a hydraulic technology and an electric technology are combined and applied to an automobile to manufacture a hybrid power automobile. The hybrid electric vehicle is used as a transition stage from a traditional fuel electric vehicle to a pure electric vehicle, and plays a significant role in the development of the automobile industry in China. Because hybrid vehicle can adopt different mode to adapt to the changeable operating mode in the actual driving process to realize the balance of car dynamic nature and fuel economy, and can reduce gaseous emission of pollution to a great extent, its energy-conserving potentiality and duration are not a little worth. The switching of different working modes of the hybrid electric vehicle is completed by controlling the clutch, and a wet clutch is mostly adopted, and the task is undertaken by a hydraulic control module, and the hydraulic control module sends a control electric signal received from an electric control unit (TCU) to an electromagnetic directional valve so as to adjust the pressure and the flow of oil in a hydraulic module and change the flow direction of the oil, thereby changing the state of each element and realizing the control of the disconnection and the connection of the clutch.

In addition, nowadays when automation and labor saving are pursued, in addition to hydraulic technology, electrical technology and the like, pneumatic technology is also rapidly developed, and compared with hydraulic and electrical technology, pneumatic technology has the advantages of simple structure and safe use. The pneumatic technology uses compressed air as a working medium, is clean and pollution-free, and has high reliability, so the pneumatic technology is widely applied to various industries and plays a significant role in various industries. Research and development of pneumatic technology are necessary, and the pneumatic technology becomes an indispensable use technology for industrial production and is also a technology which cannot be developed in the human society. Therefore, a pneumatic system is needed to provide the functions of clamping, overturning, positioning and residual oil discharging for the hybrid power hydraulic module test platform by using the pneumatic system, so as to conveniently research the hybrid power.

Disclosure of Invention

Aiming at the existing problems, the method for building the pneumatic system of the hybrid power hydraulic module test platform is provided, so that the pneumatic system is used for providing the functions of clamping, overturning, positioning and residual oil discharging for the hybrid power hydraulic module test platform, and further the research on hybrid power is conveniently carried out.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a method for building a pneumatic system of a hybrid power hydraulic module test platform comprises the following steps:

constructing a pneumatic air path: the pneumatic gas circuit comprises a clamping pneumatic gas circuit, a positioning pneumatic gas circuit, a turning pneumatic gas circuit and a residual oil discharging shifting fork pneumatic gas circuit, wherein,

the clamping pneumatic air circuit comprises a first electromagnetic directional valve, a first speed regulating valve and a clamping cylinder, wherein an air inlet of the first electromagnetic directional valve is used for being connected with an air source, a first working port of the first electromagnetic directional valve is connected with a first air port of the clamping cylinder, and a second air port of the clamping cylinder is connected with a second working port of the first electromagnetic directional valve through the first speed regulating valve;

the positioning pneumatic gas circuit comprises a second electromagnetic directional valve, a second speed regulating valve and a positioning cylinder, wherein a gas inlet of the second electromagnetic directional valve is used for being connected with a gas source, a first working port of the second electromagnetic directional valve is connected with a first gas port of the positioning cylinder, and a second gas port of the positioning cylinder is connected with a second working port of the second electromagnetic directional valve through the second speed regulating valve;

the overturning pneumatic gas circuit comprises a third electromagnetic directional valve, a third speed regulating valve and an overturning cylinder, wherein a gas inlet of the third electromagnetic directional valve is used for being connected with a gas source, a first working port of the third electromagnetic directional valve is connected with a first gas port of the overturning cylinder, and a second gas port of the overturning cylinder is connected with a second working port of the third electromagnetic directional valve through the third speed regulating valve;

the residual oil discharging shifting fork pneumatic gas circuit comprises a fourth electromagnetic reversing valve, a fourth speed regulating valve and a residual oil discharging shifting fork cylinder, wherein a gas inlet of the fourth electromagnetic reversing valve is used for being connected with a gas source, a first working port of the fourth electromagnetic reversing valve is connected with a first gas port of the residual oil discharging shifting fork cylinder, and a second gas port of the residual oil discharging shifting fork cylinder is connected with a second working port of the fourth electromagnetic reversing valve through the fourth speed regulating valve;

and selecting the types of elements forming a clamping pneumatic air circuit, a positioning pneumatic air circuit, a turning pneumatic air circuit and a residual oil discharging shifting fork pneumatic air circuit.

Further, a clamping cylinder is selected to be a cylinder with the model number of CDG1UA32-50-M9B, a positioning cylinder is selected to be a cylinder with the model number of CDQ2B16-20D-M9B, a turning cylinder is selected to be a cylinder with the model number of CDG1UA32-100-M9B, and a residual oil discharging fork cylinder is selected to be a cylinder with the model number of CDQ2B32-20 DZ-M9B.

Further, the model selection method of the clamping cylinder, the positioning cylinder, the overturning cylinder and the residual oil discharging shifting fork cylinder comprises the following steps: determining the load rate of the air cylinder according to the preset working state of the air cylinder; determining the working pressure and the output force of the cylinder; calculating according to the output force, the load rate and the working pressure of the cylinder to obtain the inner diameter of the cylinder; and selecting the air cylinder of the corresponding type meeting the requirement of the inner diameter of the air cylinder according to the task requirement to be finished by the air cylinder.

Further, the cylinder bore D is obtained by calculation according to the following formula:

in the formula: f, outputting force by a cylinder; p-working pressure; eta-load rate.

Further, the model selection method of the first speed regulating valve, the second speed regulating valve, the third speed regulating valve and the fourth speed regulating valve comprises the following steps: the instantaneous flow of the cylinder is obtained through calculation according to the inner diameter of the cylinder, the maximum movement speed of the cylinder and the working pressure, the flow of the corresponding speed regulating valve is determined according to the instantaneous flow of the cylinder, and the model of the corresponding speed regulating valve is selected according to the flow of the speed regulating valve.

Further, the instantaneous flow Q of the cylinder is obtained by calculation according to the following formula:

wherein, D-cylinder bore, unit: mm; vmax-cylinder maximum movement speed, position: mm/s; p-working pressure of cylinder, unit: 10⁵Pa。

Further, the model selection of the speed regulating valve is as follows: the first speed regulating valve and the third speed regulating valve are speed regulating valves with the model number of AS2201F-01-06S, the second speed regulating valve is a speed regulating valve with the model number of AS1201F-M5-04, and the fourth speed regulating valve is a speed regulating valve with the model number of AS 2201F-01-08S.

Further, the model selection method of the first electromagnetic directional valve, the second electromagnetic directional valve, the third electromagnetic directional valve and the fourth electromagnetic directional valve comprises the following steps: and calculating to obtain the maximum air consumption of the air cylinder according to the inner diameter of the air cylinder, the maximum movement speed of the air cylinder and the working pressure of the corresponding air cylinder, and selecting the model of the corresponding electromagnetic directional valve according to the maximum air consumption of the air cylinder.

Further, the maximum gas consumption G of the cylinder is calculated according to the following formula:

G＝0.046D²V_max(p +0.102), wherein D-cylinder bore, unit: mm; vmax-cylinder maximum movement speed, position: mm/s; p-working pressure of cylinder, unit: MPa.

Furthermore, the first electromagnetic directional valve, the third electromagnetic directional valve and the fourth electromagnetic directional valve are all electromagnetic directional valves with the model number of SY7140-5D-02, and the second electromagnetic directional valve is an electromagnetic directional valve with the model number of SY 3120-5L-M5.

The invention also provides a pneumatic system of the hybrid power hydraulic module test platform, which comprises a clamping pneumatic air passage, a positioning pneumatic air passage, a turning pneumatic air passage and a residual oil discharging shifting fork pneumatic air passage, wherein,

the clamping pneumatic air circuit comprises a first electromagnetic directional valve (10), a first speed regulating valve (11) and a clamping cylinder (12), an air inlet of the first electromagnetic directional valve (10) is used for being connected with an air source, a first working port of the first electromagnetic directional valve (10) is connected with a first air port of the clamping cylinder (12), and a second air port of the clamping cylinder (12) is connected with a second working port of the first electromagnetic directional valve (10) through the first speed regulating valve (11);

the positioning pneumatic air circuit comprises a second electromagnetic directional valve (20), a second speed regulating valve (21) and a positioning air cylinder (22), an air inlet of the second electromagnetic directional valve (20) is used for being connected with an air source, a first working port of the second electromagnetic directional valve (20) is connected with a first air port of the positioning air cylinder (22), and a second air port of the positioning air cylinder (22) is connected with a second working port of the second electromagnetic directional valve (20) through the second speed regulating valve (21);

the overturning pneumatic air path comprises a third electromagnetic directional valve (30), a third speed regulating valve (31) and an overturning air cylinder (32), an air inlet of the third electromagnetic directional valve (30) is used for being connected with an air source, a first working port of the third electromagnetic directional valve (30) is connected with a first air port of the overturning air cylinder (32), and a second air port of the overturning air cylinder (32) is connected with a second working port of the third electromagnetic directional valve (30) through the third speed regulating valve (31);

the pneumatic gas circuit of the residual oil discharging shifting fork comprises a fourth electromagnetic directional valve (40), a fourth speed regulating valve (41) and a residual oil discharging shifting fork cylinder (43), a gas inlet of the fourth electromagnetic directional valve (40) is used for being connected with a gas source, a first working port of the fourth electromagnetic directional valve (40) is connected with a first gas port of the residual oil discharging shifting fork cylinder (43), and a second gas port of the residual oil discharging shifting fork cylinder (43) is connected with a second working port of the fourth electromagnetic directional valve (40) through the fourth speed regulating valve (41).

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. the pneumatic air circuit comprises a clamping pneumatic air circuit, a positioning pneumatic air circuit, a turning pneumatic air circuit and a residual oil discharging shifting fork pneumatic air circuit, when the pneumatic system is used, air is used as a medium, a clamping cylinder, a positioning cylinder, a turning cylinder and a residual oil discharging shifting fork cylinder are used as executing elements, a speed regulating valve, an electromagnetic reversing valve and other elements are used for controlling and distributing a system air source, the air source controls the working state of the corresponding cylinder through the electromagnetic reversing valve, the working speed of the cylinder is controlled through the speed regulating valve, so that the cylinder acts, the functions of clamping, positioning, turning and residual oil discharging are completed, and further, the research on hybrid power is facilitated.

2. According to the pneumatic system of the hybrid power hydraulic module test platform and the construction method thereof, compressed air is used as a working medium, the air source is wide, the compressed air is discharged into the atmosphere after being used, the treatment is convenient and simple, the cleanness is realized, the environment is not threatened, and as the loss of air flow is small and the air has compressibility, conditions are provided for centralized air supply, and the long-distance conveying is facilitated; compared with hydraulic transmission and the like, the hydraulic transmission device has the advantages that the hydraulic transmission device is quick in action, sensitive in response and convenient and fast to maintain, a pipeline is not easy to block due to the fact that the working medium is air, the difficult problems of deterioration, supplement and replacement of the medium are not needed to be considered, the requirement on the working environment is not high, the hydraulic transmission device can adapt to places such as inflammability and explosiveness, and safety and reliability are guaranteed.

3. According to the pneumatic system of the hybrid power hydraulic module test platform and the construction method thereof, the pneumatic elements adopted by the pneumatic gas circuit constructed by the pneumatic system are simple in structure, do not need to consume large actions in installation and maintenance, and have low requirements on pressure, so that the pneumatic system is safe and reliable to use, and the cost of the pneumatic elements is low.

4. The pneumatic system of the hybrid power hydraulic module test platform and the construction method thereof also provide a method for selecting the types of elements forming the clamping pneumatic air circuit, the positioning pneumatic air circuit, the overturning pneumatic air circuit and the residual oil discharging shifting fork pneumatic air circuit, and elements such as an air cylinder, an electromagnetic reversing valve, a speed regulating valve and the like can be selected according to task requirements to be completed by the air cylinder by the method, so that the test requirements are met, and the pneumatic system has the advantages of safety, applicability and economy.

Drawings

Fig. 1 is a gas circuit diagram of a pneumatic system of a hybrid hydraulic module testing platform according to a preferred embodiment of the present invention.

Description of the main elements

10. A first electromagnetic directional valve; 11. a first speed regulating valve; 12. a clamping cylinder; 13. a first muffler; 14. a first main air pipe; 15. a first bronchus; 16. a first connecting air pipe; 17. a second main air pipe; 18. a second bronchus; 19. a second connecting air pipe; 20. a second electromagnetic directional valve; 21. a second speed regulating valve; 22. positioning the air cylinder; 30. a third electromagnetic directional valve; 31. a third speed regulating valve; 32. turning over the air cylinder; 33. a third main air pipe; 34. a third branch gas pipe; 35. a third connecting air pipe; 36. a fourth main air pipe; 37. a fourth bronchus; 40. a fourth electromagnetic directional valve; 41. a fourth speed regulating valve; 43. a shifting fork cylinder for discharging residual oil; 5. a second muffler; 6. a main gas supply line; 7. an air filter; 8. a control valve; 91. a pressure reducing valve; 92. a two-way valve; 93. a fine filter; 95. and a fifth speed regulating valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a preferred embodiment of the present invention provides a method for building a pneumatic system of a hybrid hydraulic module test platform, including the following steps:

s1, constructing a pneumatic air path: the pneumatic gas circuit comprises a clamping pneumatic gas circuit, a positioning pneumatic gas circuit, a turning pneumatic gas circuit and a residual oil discharging shifting fork pneumatic gas circuit, wherein,

the clamping pneumatic air circuit comprises a first electromagnetic directional valve 10, a first speed regulating valve 11 and a clamping cylinder 12, an air inlet of the first electromagnetic directional valve 10 is used for being connected with an air source, a first working port of the first electromagnetic directional valve 10 is connected with a first air port of the clamping cylinder 12, and a second air port of the clamping cylinder 12 is connected with a second working port of the first electromagnetic directional valve 10 after passing through the first speed regulating valve 11.

In the present embodiment, the first electromagnetic directional valve 10 is a two-position five-way electromagnetic directional valve, and the two-position five-way electromagnetic directional valve is an automatic basic element for controlling fluid, and in a pneumatic circuit, the on-off of a gas flow pipeline is controlled or the flow direction of gas is changed. One side of the two-position five-way electromagnetic reversing valve is provided with two interfaces, namely a first working port and a second working port, and the first working port and the second working port are used for being connected with the cylinder and are reversing working ports; the other side of the two-position five-way electromagnetic directional valve is provided with three ports, namely an air inlet and two air outlets, wherein the air inlet is used for being connected with an air source, and in the embodiment, the air inlet of the first electromagnetic directional valve 10 is connected with the air source through a main air supply pipeline 6. When the air cylinder is used, the magnet coil in the two-position five-way electromagnetic reversing valve is electrified to attract the valve body in the two-position five-way electromagnetic reversing valve to move, and the valve body is adjusted to move to control the covering or lifting of each interface, so that compressed air can enter the cylinder body of the air cylinder, and the piston of the air cylinder is pushed to move back and forth. The structure of the two-position five-way electromagnetic directional valve belongs to the prior art, and is not described herein for brevity. In the present embodiment, the first electromagnetic directional valve 10 is further connected to a first muffler 13, and specifically, two exhaust ports of the first electromagnetic directional valve 10 are respectively connected to a first muffler 13.

In this embodiment, the number of the clamping cylinders 12 is plural, and the first working port of the first electromagnetic directional valve 10 is connected to the first air ports of the plurality of clamping cylinders 12 through the first air path, specifically: the first air path comprises a first main air pipe 14 and a plurality of first branch air pipes 15 connected with the first main air pipe 14 at one end, the first main air pipe 14 is connected with a first working port of the first electromagnetic directional valve 10 through a first connecting air pipe 16, and the other ends of the plurality of first branch air pipes 15 are respectively connected with first air ports of the plurality of clamping cylinders 12; the second working port of the first electromagnetic directional valve 10 is connected with the second air ports of the plurality of clamping cylinders 12 through a second air path, the second air path comprises a second main air pipe 17 and a plurality of second branch air pipes 18 connected with the second main air pipe 17 at one end, the second main air pipe 17 is connected with the second working port of the first electromagnetic directional valve 10 through a second connecting air pipe 19, and the other ends of the plurality of second branch air pipes 18 are respectively connected with the second air ports of the plurality of clamping cylinders 12. The first speed regulating valves 11 are provided in plural corresponding to the clamping cylinders 12, and the plural first speed regulating valves 11 are respectively installed on the corresponding second branch air pipes 18.

The construction of the clamping cylinder 12 is well known in the art and will not be described herein for brevity. When the compressed gas enters the cylinder body of the clamping cylinder 12 from the first gas port, the clamping cylinder 12 is in a state of clamping the workpiece, and when the compressed gas enters the cylinder body of the clamping cylinder 12 from the second gas port, the clamping cylinder 12 is restored to the original state, and the workpiece is separated from the clamping state. The first speed regulating valve 11, i.e. the speed control valve, is a flow control valve formed by combining a check valve and a throttle valve in parallel, so it is also called a check throttle valve, and the structure of the first speed regulating valve 11 belongs to the prior art, and is not described herein for brevity.

The positioning pneumatic air circuit comprises a second electromagnetic directional valve 20, a second speed regulating valve 21 and a positioning air cylinder 22, an air inlet of the second electromagnetic directional valve 20 is used for being connected with an air source, a first working port of the second electromagnetic directional valve 20 is connected with a first air port of the positioning air cylinder 22, and a second air port of the positioning air cylinder 22 is connected with a second working port of the second electromagnetic directional valve 20 after passing through the second speed regulating valve 21.

In this embodiment, the second electromagnetic directional valve 20 is a two-position five-way electromagnetic directional valve, and one side of the two-position five-way electromagnetic directional valve is provided with two ports, i.e., a first working port and a second working port, which are used for being connected with the cylinder and are directional working ports; the other side of the two-position five-way electromagnetic directional valve is provided with three ports, namely an air inlet and two air outlets, wherein the air inlet is used for being connected with an air source, and in the embodiment, the air inlet of the second electromagnetic directional valve 20 is connected with the air source through the main air supply pipeline 6. The structure of the two-position five-way electromagnetic directional valve belongs to the prior art, and is not described herein for brevity.

In the present embodiment, the number of the positioning cylinders 22 is one, the number of the second speed control valves 21 is two, the first working port of the second electromagnetic directional valve 20 is connected to the first port of the positioning cylinder 22 through one second speed control valve 21, and the second working port of the first electromagnetic directional valve 10 is connected to the second port of the positioning cylinder 22 through the other second speed control valve 21. The structure of the positioning cylinder 22 is prior art and will not be described herein for brevity. When the compressed gas enters the cylinder body of the positioning cylinder 22 from the first port of the positioning cylinder 22, the positioning cylinder 22 is in a positioning state, and when the compressed gas enters the cylinder body of the positioning cylinder 22 from the second port of the positioning cylinder 22, the positioning cylinder 22 is restored to the original state and is separated from the positioning state. The second speed regulating valve 21, i.e. the speed control valve, is a flow control valve formed by combining a check valve and a throttle valve in parallel, so the structure of the second speed regulating valve 21 is also called a check throttle valve, and the structure belongs to the prior art, and is not described herein for brevity. According to the experimental requirement of the positioning cylinder 22, the speed of the positioning and resetting process of the positioning cylinder 22 can be controlled by arranging the two second speed regulating valves 21, so that the positioning precision is further improved.

The overturning pneumatic air path comprises a third electromagnetic directional valve 30, a third speed regulating valve 31 and an overturning air cylinder 32, an air inlet of the third electromagnetic directional valve 30 is used for being connected with an air source, a first working port of the third electromagnetic directional valve 30 is connected with a first air port of the overturning air cylinder 32, and a second air port of the overturning air cylinder 32 is connected with a second working port of the third electromagnetic directional valve 30 after passing through the third speed regulating valve 31.

In the present embodiment, the third electromagnetic directional valve 30 is a two-position five-way electromagnetic directional valve, and one side of the third electromagnetic directional valve is provided with two ports, i.e., a first working port and a second working port, which are used for connecting with a cylinder and are directional working ports; the other side of the two-position five-way electromagnetic directional valve is provided with three ports, namely an air inlet and two air outlets, wherein the air inlet is used for being connected with an air source, and in the embodiment, the air inlet of the third electromagnetic directional valve 30 is connected with the air source through the main air supply pipeline 6.

In this embodiment, the number of the turnover cylinders 32 is plural, and the first working port of the third electromagnetic directional valve 30 is connected to the first air ports of the plurality of turnover cylinders 32 through the third air path, specifically: the third air path comprises a third main air pipe 33 and a plurality of third branch air pipes 34 connected with the third main air pipe 33 at one end, the third main air pipe 33 is connected with the first working port of the third electromagnetic directional valve 30 through third connecting air pipes 35, and the other ends of the plurality of third branch air pipes 34 are respectively connected with the first air ports of the plurality of turnover air cylinders 32; the second working port of the third electromagnetic directional valve 30 is connected with the second air ports of the plurality of turnover cylinders 32 through a fourth air path, specifically: the fourth air path comprises a fourth main air pipe 36 and a plurality of fourth branch air pipes 37 connected with the fourth main air pipe 36 at one end, the free tail ends, far away from the fourth branch air pipes 37, of the fourth main air pipes 36 are connected with the second working ports of the third electromagnetic directional valves 30, and the other ends of the fourth branch air pipes 37 are respectively connected with the second air ports of the overturning air cylinders 32. The fourth speed control valves 41 are provided in plural corresponding to the reversing cylinders 32, and the plural fourth speed control valves 41 are respectively installed on the corresponding fourth branch air pipes 37. The fourth speed regulating valve 41, i.e. the speed control valve, is a flow control valve formed by combining a check valve and a throttle valve in parallel, so the structure of the fourth speed regulating valve 41 is also called a check throttle valve, and the structure belongs to the prior art, and is not described herein for brevity.

The structure of the tilt cylinder 32 is well known in the art and will not be described herein for brevity. When the compressed gas enters the cylinder body of the turnover cylinder 32 from the first gas port of the turnover cylinder 32, the turnover cylinder 32 can rotate 180 ° in a first direction to realize turnover operation of the workpiece, and when the compressed gas enters the cylinder body of the turnover cylinder 32 from the second gas port, the turnover cylinder 32 can rotate in a second direction opposite to the first direction to restore the original shape.

The residual oil discharging shifting fork pneumatic air circuit comprises a fourth electromagnetic directional valve 40, a fourth speed regulating valve 41 and a residual oil discharging shifting fork air cylinder 43, an air inlet of the fourth electromagnetic directional valve 40 is used for being connected with an air source, a first working port of the fourth electromagnetic directional valve 40 is connected with a first air port of the residual oil discharging shifting fork air cylinder 43, and a second air port of the residual oil discharging shifting fork air cylinder 43 is connected with a second working port of the fourth electromagnetic directional valve 40 after passing through the fourth speed regulating valve 41.

In this embodiment, the fourth electromagnetic directional valve 40 is a two-position five-way electromagnetic directional valve, and one side of the fourth electromagnetic directional valve is provided with two ports, i.e., a first working port and a second working port, which are used for connecting with a cylinder and are directional working ports; the other side of the two-position five-way electromagnetic directional valve is provided with three ports, namely an air inlet and two air outlets, wherein the air inlet is used for being connected with an air source, and in the embodiment, the air inlet of the fourth electromagnetic directional valve 40 is connected with the air source through the main air supply pipeline 6. The number of the fourth speed regulating valves 41 is two, the first working port of the fourth electromagnetic directional valve 40 is connected with the first air port of the residual oil discharging shift fork cylinder 43 through one fourth speed regulating valve 41, and the second working port of the fourth electromagnetic directional valve 40 is connected with the second air port of the residual oil discharging shift fork cylinder 43 through the other fourth speed regulating valve 41. In this embodiment, by providing two fourth speed control valves 41, the switching speeds of the valves for discharging residual oil in the pneumatic system of the hybrid hydraulic module test platform can be controlled respectively, and the damage to the valves for discharging residual oil is reduced.

The structure of the fork cylinder 43 for discharging the residual oil belongs to the prior art, and is not described herein for brevity. When the compressed gas enters the cylinder body of the residual oil discharging shift fork cylinder 43 from the first gas port, the residual oil discharging shift fork cylinder 43 is in a residual oil discharging state, and when the compressed gas enters the cylinder body of the residual oil discharging shift fork cylinder 43 from the second gas port, the residual oil discharging shift fork cylinder 43 is restored to the original state, and the residual oil discharging is stopped.

In the present embodiment, the third electromagnetic directional valve 30 and the fourth electromagnetic directional valve 40 are further connected to the second muffler 5, specifically: in the present embodiment, the number of the second mufflers 5 is two, the first exhaust port of the third electromagnetic directional valve 30 and the first exhaust port of the fourth electromagnetic directional valve 40 are both connected to one of the second mufflers 5, and the second exhaust port of the third electromagnetic directional valve 30 and the second exhaust port of the fourth electromagnetic directional valve 40 are both connected to the other second muffler 5.

In the present embodiment, the air inlet of the first electromagnetic directional valve 10, the air inlet of the second electromagnetic directional valve 20, the air inlet of the third electromagnetic directional valve 30, and the air inlet of the fourth electromagnetic directional valve 40 are connected to the air supply through the main air supply line 6. The pneumatic system further comprises an air filter 7 and a control valve 8 which are installed on the main air supply pipeline 6, an air inlet of the first electromagnetic directional valve 10 is connected with an air source sequentially through the control valve 8 and the air filter 7, an air inlet of the second electromagnetic directional valve 20 is connected with the air source sequentially through the control valve 8 and the air filter 7, an air inlet of the third electromagnetic directional valve 30 is connected with the air source sequentially through the control valve 8 and the air filter 7, and an air inlet of the fourth electromagnetic directional valve 40 is connected with the air source sequentially through the control valve 8 and the air filter 7. The control valve 8 may be a gas valve or the like in the prior art, which is used for controlling the on/off of the gas transmission and the ventilation volume of the main gas supply pipeline 6, and will not be described herein for brevity.

The pneumatic system further comprises an external air supply circuit, and the external air supply circuit comprises a pressure reducing valve 91, a two-way valve 92, a fine filter 93 and a fifth speed regulating valve 95 which are connected in sequence. An air inlet of the pressure reducing valve 91 is connected with the main air supply pipeline 6, and an air outlet of the fifth speed regulating valve 95 is used for being connected with other air-using equipment such as an air bin of the hybrid power hydraulic module test platform. In the present embodiment, the number of the fine filters 93 is two, and the two fine filters 93 are connected in series in the external air supply path. During the use, through the outlet pressure of relief pressure valve 91 control air feed gas circuit, through the break-make that two-way valve 92 control air feed gas circuit passed gas, filter out clean air through two-stage fine filter 93, after adjusting the gas flow rate through fifth governing valve 95 again to gas appliances such as the gas storehouse for hybrid hydraulic module test platform provide cleaner, safer air supply. The structures of the pressure reducing valve 91, the two-way valve 92, the fine filter 93 and the fifth speed regulating valve 95 are all in the prior art, and are not described herein for brevity.

And S2, selecting the types of the elements forming the clamping pneumatic air circuit, the positioning pneumatic air circuit, the turning pneumatic air circuit and the residual oil discharging shifting fork pneumatic air circuit.

In the present embodiment, the model selection method for the clamping cylinder 12, the positioning cylinder 22, the overturning cylinder 32 and the residual oil discharging fork cylinder 43 comprises the following steps:

s21, determining the load factor of the cylinder according to the preset working state of the cylinder; specifically, the load factor of each cylinder may be determined according to table 1:

table 1 load factor selection table

In the present embodiment, the load factor η is taken to be 0.7 according to the preset operating states of the clamp cylinder 12, the positioning cylinder 22, the tumble cylinder 32, and the residual oil discharge fork cylinder 43.

S22, determining the working pressure and the output force of each cylinder; specifically, the working pressure and the cylinder output force of the cylinder need to be determined according to the preset use conditions of the cylinder, in this embodiment, the preset use conditions of the clamp cylinder 12, the positioning cylinder 22, the turnover cylinder 32, and the residual oil discharge fork cylinder 43 are shown in table 2, and the working pressures of the clamp cylinder 12, the positioning cylinder 22, the turnover cylinder 32, and the residual oil discharge fork cylinder 43 are all preset to be p ═ 0.5 MPa.

Table 2: conditions of use of the cylinder

Name (R)	Clamping cylinder	Positioning cylinder	Overturning air cylinder	Shift fork cylinder for discharging residual oil
					Output force/N	250	60	250	250
Stroke/mm	50	20	100	20

S23, calculating according to the output force, the load factor and the working pressure of the cylinder to obtain the cylinder inner diameter, specifically, calculating according to the following formula to obtain the cylinder inner diameter D:

in the formula: f, outputting force by a cylinder; p-working pressure; eta-load rate.

Specifically, the cylinder bore D of the clamp cylinder 12 is calculated as follows:

therefore, according to the GB/T2348-1993 standard, the cylinder bore D of the clamping cylinder 12 is selected to be 32 mm.

The cylinder bore D of the positioning cylinder 22 is calculated as follows:

therefore, according to the GB/T2348-1993 standard, the cylinder inner diameter D of the positioning cylinder 22 is selected to be 16 mm.

The cylinder bore D of the tumble cylinder 32 is calculated as follows:

therefore, according to the GB/T2348-1993 standard, the cylinder inner diameter D of the overturning cylinder 32 is 32 mm.

The cylinder bore of the residual oil discharge fork cylinder 43 is calculated as follows:

therefore, according to the GB/T2348-1993 standard, the cylinder inner diameter D of the residual oil discharging shifting fork cylinder 43 is selected to be 32 mm.

And S24, selecting the air cylinder of the corresponding type meeting the requirement of the inner diameter of each air cylinder according to the task requirement to be completed by each air cylinder.

Specifically, the clamp cylinder 12 and the tumble cylinder 32 are required to have no impact and no noise when reaching the stroke end, and therefore, the clamp cylinder 12 and the tumble cylinder 32 of the pneumatic system both select an air cushion type cylinder, and in addition, because piston rods of the clamp cylinder 12 and the tumble cylinder 32 do linear motion and swing along with the cylinder body, the clamp cylinder 12 and the tumble cylinder 32 of the pneumatic system both select a cylinder with a rod side trunnion type mounting mode. Because the stroke of location cylinder 22 and row's residual oil shift fork cylinder 43 is short, and installation space is narrow, consequently, thin CQ formula cylinder is all selected to this pneumatic system's location cylinder 22 and row's residual oil shift fork cylinder 43. In this embodiment, the clamp cylinder 12 is a clamp cylinder of CDG1UA32-50-M9B, the positioning cylinder 22 is a positioning cylinder of CDQ2B16-20D-M9B, the tilt cylinder 32 is a tilt cylinder of CDG1UA32-100-M9B, and the residual oil removing fork cylinder 43 is a residual oil removing fork cylinder of CDQ2B32-20DZ-M9B, which can meet the cylinder inside diameter requirement of each cylinder calculated in step S23, specifically please refer to table 3.

TABLE 3

Serial number	Name (R)	Model number	Manufacturer of the product
				1	Clamping cylinder	CDG1UA32-50-M9B	SMC
2	Positioning cylinder	CDQ2B16-20D-M9B	SMC
				3	Overturning air cylinder	CDG1UA32-100-M9B	SMC
4	Shift fork cylinder for discharging residual oil	CDQ2B32-20DZ-M9B	SMC

The first speed regulating valve 11, the second speed regulating valve 21, the third speed regulating valve 31 and the fourth speed regulating valve 41 are respectively used for regulating the flowing speed of gas in the corresponding cylinder, namely controlling the working speed of the corresponding cylinder, and in the embodiment, the model selection method of the first speed regulating valve 11, the second speed regulating valve 21, the third speed regulating valve 31 and the fourth speed regulating valve 41 comprises the following steps:

s31, calculating and obtaining the instantaneous flow of the cylinder according to the cylinder inner diameter, the maximum moving speed and the working pressure of the cylinder: in the present embodiment, the instantaneous flow rate Q of the cylinder is obtained by calculation according to the following formula:

wherein, D-cylinder bore, unit: mm; vmax-cylinder maximum movement speed, unit: mm/s, which can be obtained according to the parameters of the selected cylinder; p-working pressure of cylinder, unit: 10⁵Pa。

Specifically, the instantaneous flow rate Q of the clamp cylinder 12 is calculated as follows:

the instantaneous flow Q of the positioning cylinder 22 is calculated as follows:

the instantaneous flow Q of the tumble cylinder 32 is calculated as follows:

the instantaneous flow Q of the residual oil removing fork cylinder 43 is calculated as follows:

and S32, determining the flow of the corresponding speed regulating valve according to the instantaneous flow of the air cylinder, and selecting the model of the corresponding speed regulating valve according to the flow of the speed regulating valve. In the embodiment, the maximum flow rate of the adopted speed regulating valve cannot be smaller than the instantaneous flow rate Q of the corresponding cylinder, specifically, the speed regulating valves with the models AS2201F-01-06S are adopted for the first speed regulating valve 11 and the third speed regulating valve 31, the speed regulating valves with the models AS1201F-M5-04 are adopted for the second speed regulating valve 21, and the speed regulating valves with the models AS2201F-01-08S are adopted for the fourth speed regulating valve 41, and specific parameters are shown in table 4.

TABLE 4

The selected speed regulating valves have the following advantages:

(1) the structure is small and the weight is light;

(2) the flow rate characteristic is good, the height is small, the design can be compact, and the effective area meets the requirement;

(3) the working pressure can be up to 1 MPa;

(4) the material suitable for the pipe is as follows: nylon, soft nylon, polyurethane;

(5) in the low flow rate range, the speed control becomes easy, and the constant speed control is possible.

The two-position five-way electromagnetic reversing valve consists of an electromagnetic control part and a reversing valve. The electromagnet is a main component of the two-position five-way electromagnetic reversing valve and consists of a coil, a static iron core and a movable iron core. Electromagnetic energy is converted into mechanical energy according to the electromagnetic principle, so that the iron core pushes the valve core to move, and the flowing direction of gas is changed. The clamping cylinder 12, the positioning cylinder 22, the overturning cylinder 32 and the residual oil discharging shifting fork cylinder 43 are double-acting piston cylinders, and the two-position five-way electromagnetic reversing valve can control the double-acting piston cylinders to reciprocate back and forth and cannot stop the cylinders from moving at any position in a stroke range, so that the two-position five-way electromagnetic reversing valve is selected to control the flowing direction of gas.

In the present embodiment, the model selection method for the first electromagnetic directional valve 10, the second electromagnetic directional valve 20, the third electromagnetic directional valve 30, and the fourth electromagnetic directional valve 40 includes the steps of:

and S41, calculating and obtaining the maximum air consumption of the air cylinder according to the inner diameter, the maximum movement speed and the working pressure of the air cylinder, and selecting the model of the corresponding electromagnetic directional valve according to the maximum air consumption of the air cylinder. Specifically, in the present embodiment, the maximum gas consumption G of the cylinder is obtained by calculation according to the following formula:

G＝0.046D²V_max(p +0.102), wherein D-cylinder bore, unit: mm; vmax-maximum speed of movement of the cylinder, unit: mm/s; p-working pressure of cylinder, unit: MPa.

The maximum gas consumption G of the clamping cylinder 12 is calculated as follows:

G＝0.046D²V_max(p+0.102)＝0.046×3.2²×700×0.602＝198.50L/min

the maximum gas consumption G of the positioning cylinder 22 is calculated as follows:

G＝0.046D²V_max(p+0.102)＝0.046×1.6²×700×0.602＝49.63L/min

the maximum gas consumption G of the tumble cylinder 31 is calculated as follows:

G＝0.046D²V_max(p+0.102)＝0.046×3.2²×700×0.602＝198.50L/min

the maximum gas consumption G of the residual oil removing fork cylinder 43 is calculated as follows:

G＝0.046D²V_max(p+0.102)＝0.046×3.2²×700×0.602＝198.50L/min

selecting the model SY7140-5D-02 of the first electromagnetic directional valve 10 according to the obtained maximum air consumption G of the clamping cylinder 12; selecting the model SY3120-5L-M5 of the second electromagnetic directional valve 20 according to the obtained maximum air consumption G of the positioning cylinder 22; selecting the model SY7140-5D-02 of the third electromagnetic directional valve 30 according to the obtained maximum air consumption G of the overturning cylinder 32; according to the maximum gas consumption G of the residual oil removing shifting fork cylinder 43, the model SY7140-5D-02 of the fourth electromagnetic directional valve 40 is selected, and specific parameters are shown in the table 5.

TABLE 5

Use of	Model number	Rated pressure	Whether or not to carry a wire	With or without brackets
					First, third and fourth electromagnetic directional valves	SY7140-5D-02	24V	Is free of	Is free of
Second electromagnetic directional valve	SY3120-5L-M5	24V	With wire	Is free of

In the present embodiment, the structure of the air filter 7 belongs to the related art. Considering that the clamping cylinder 12, the positioning cylinder 22, the overturning cylinder 32 and the residual oil discharging fork cylinder 43 adopted in the embodiment are all common standard cylinders, the requirement on the filtering precision is general, and in order to reduce the external dimension, save the space and facilitate the centralized management and maintenance, the air filter 7 of SMC with model AW30-03BE is selected for the purpose, and the filtering precision is about 5 um.

When compressed air enters a pneumatic system and reaches the electromagnetic directional valve, the compressed air needs to pass through a plurality of straight pipes and elbows with different pipe diameters, so that the air in the pipeline is severely disturbed, and noise is radiated. The noise generated when the pneumatic system operates is eliminated by the silencer in the embodiment from interfering with the test. In the present embodiment, the basic requirements for the selection of the muffler type are:

firstly, the noise reduction performance is good, namely the noise reduction performance is required to be good, and the general range of noise is controlled between 74 dB and 80 dB;

secondly, the silencer has better aerodynamic performance, and has small resistance loss to airflow when being applied;

the silencer structure should be simple, be favorable to processing conveniently, and economy and durable, no regenerative noise produces.

According to the above requirements, the SMC metal main body type muffler with model number AN200-02 is selected because of its small ventilation resistance, small size, simple installation and capability of eliminating 30dB of noise. The structural dimensions are shown in table 6:

TABLE 6 muffler structural dimensions

Size of the opening	Effective area/mm2	Mass/g
			1/4	35	17

The air passes through the air filter 7 to obtain clean compressed air, and the air passes through a five-way electromagnetic directional valve for controlling the clamping cylinder 12, a five-way electromagnetic directional valve for controlling the overturning cylinder 32, a five-way electromagnetic directional valve for controlling displacement and a five-way electromagnetic directional valve for controlling an oil discharge shifting fork to control the reciprocating motion of the corresponding cylinders. Specifically, the method comprises the following steps:

when the clamping air path works, after the air source is connected, the air removes the oil, water, dust and other impurity particles in the air through the air filter 7, the control valve 8 controls the supply amount of the air source, the flow direction of the compressed air is changed and controlled through the first electromagnetic directional valve 10, namely, the reciprocating motion of the piston in the clamping cylinder 12 is controlled, in the process, the gas flow speed in the clamping cylinder 12 is adjusted through the first speed regulating valve 11, namely, the motion speed of the clamping cylinder 12 is controlled, so that the piston in the clamping cylinder 12 is pushed to operate, and the clamping cylinder 12 is enabled to perform the clamping or releasing action.

When the positioning gas circuit works, after the air source is connected, the air removes the oil, water, dust and other impurity particles in the air through the air filter 7, the control valve 8 controls the supply amount of the air source, the flow direction of the compressed air is changed and controlled through the second electromagnetic directional valve 20, namely, the reciprocating motion of the piston in the positioning cylinder 22 is controlled, in the process, the gas flow speed in the positioning cylinder 22 is adjusted through the second speed regulating valve 21, namely, the motion speed of the positioning cylinder 22 is controlled, so that the piston in the positioning cylinder 22 is pushed to operate, and the positioning function is achieved by matching with a displacement sensor carried by the positioning cylinder 22.

During the operation of upset gas circuit, after the switch-on air supply, the air gets rid of impurity particle such as oil, water, dust in the air through air cleaner 7, control valve 8 control air supply volume, the flow direction of back change and control compressed air through third solenoid directional valve 30, the reciprocating motion of piston in the upset cylinder 32 of control promptly, at this in-process, adjust the speed of gas flow in the upset cylinder 32 through third governing valve 31, the movement speed of control upset cylinder 32 promptly to promote the piston operation in the upset cylinder 32, realize the function of upset.

When the residual oil discharging gas circuit is operated, after the gas source is connected, the air removes oil, water, dust and other impurity particles in the air through the air filter 7, the control valve 8 controls the supply amount of the gas source, the flowing direction of compressed air is changed and controlled through the fourth electromagnetic directional valve 40, namely, the reciprocating motion of the residual oil discharging fork pulling cylinder 43 is controlled, the residual oil discharging fork enters the shifting fork part, in the process, the gas flowing speed in the residual oil discharging fork pulling cylinder 43 is adjusted through the fourth speed regulating valve 41, namely, the moving speed of the residual oil discharging fork pulling cylinder 43 is controlled, and the residual oil discharging action is completed.

The embodiment of the invention also provides a pneumatic system of the hybrid power hydraulic module test platform, which comprises a clamping pneumatic air passage, a positioning pneumatic air passage, a turning pneumatic air passage and a residual oil discharging shifting fork pneumatic air passage, wherein,

the clamping pneumatic air circuit comprises a first electromagnetic directional valve 10, a first speed regulating valve 11 and a clamping cylinder 12, wherein an air inlet of the first electromagnetic directional valve 10 is used for being connected with an air source, a first working port of the first electromagnetic directional valve 10 is connected with a first air port of the clamping cylinder 12, and a second air port of the clamping cylinder 12 is connected with a second working port of the first electromagnetic directional valve 10 through the first speed regulating valve 11;

the positioning pneumatic air circuit comprises a second electromagnetic directional valve 20, a second speed regulating valve 21 and a positioning air cylinder 22, wherein an air inlet of the second electromagnetic directional valve 20 is used for being connected with an air source, a first working port of the second electromagnetic directional valve 20 is connected with a first air port of the positioning air cylinder 22, and a second air port of the positioning air cylinder 22 is connected with a second working port of the second electromagnetic directional valve 20 through the second speed regulating valve 21;

the overturning pneumatic air path comprises a third electromagnetic directional valve 30, a third speed regulating valve 31 and an overturning air cylinder 32, an air inlet of the third electromagnetic directional valve 30 is used for being connected with an air source, a first working port of the third electromagnetic directional valve 30 is connected with a first air port of the overturning air cylinder 32, and a second air port of the overturning air cylinder 32 is connected with a second working port of the third electromagnetic directional valve 30 through the third speed regulating valve 31;

the residual oil discharging shifting fork pneumatic air circuit comprises a fourth electromagnetic directional valve 40, a fourth speed regulating valve 41 and a residual oil discharging shifting fork air cylinder 43, an air inlet of the fourth electromagnetic directional valve 40 is used for being connected with an air source, a first working port of the fourth electromagnetic directional valve 40 is connected with a first air port of the residual oil discharging shifting fork air cylinder 43, and a second air port of the residual oil discharging shifting fork air cylinder 43 is connected with a second working port of the fourth electromagnetic directional valve 40 through the fourth speed regulating valve 41.

The method for building the pneumatic system of the hybrid power hydraulic module test platform comprises the steps of clamping the pneumatic gas circuit, positioning the pneumatic gas circuit, turning the pneumatic gas circuit and discharging residual oil, wherein the pneumatic gas circuit comprises a pneumatic gas circuit, a turning pneumatic gas circuit and a shifting fork pneumatic gas circuit.

According to the method for building the pneumatic system of the hybrid power hydraulic module test platform, compressed air is used as a working medium, the air source is wide, the compressed air is discharged into the atmosphere after being used, the treatment is convenient and simple, the air is clean, and the environment is not threatened; compared with hydraulic transmission and the like, the hydraulic transmission device has the advantages that the hydraulic transmission device is quick in action, sensitive in response and convenient and fast to maintain, a pipeline is not easy to block due to the fact that the working medium is air, the difficult problems of deterioration, supplement and replacement of the medium are not needed to be considered, the requirement on the working environment is not high, the hydraulic transmission device can adapt to places such as inflammability and explosiveness, and safety and reliability are guaranteed.

According to the method for building the pneumatic system of the hybrid power hydraulic module test platform, the pneumatic elements adopted by the constructed pneumatic air circuit are simple in structure, and large actions are not required to be consumed for installation and maintenance. The requirement on pressure is not high, so the pneumatic element is safe and reliable to use, and the cost of the pneumatic element is low.

The method for building the pneumatic system of the hybrid power hydraulic module test platform also provides a method for selecting the types of elements forming the clamping pneumatic air circuit, the positioning pneumatic air circuit, the overturning pneumatic air circuit and the residual oil discharging shifting fork pneumatic air circuit.

The building method of the pneumatic system of the hybrid power hydraulic module test platform is further provided with an external air supply circuit, the external air supply circuit comprises a pressure reducing valve 91, a two-way valve 92, a fine filter 93 and a fifth speed regulating valve 95 which are sequentially connected, an air inlet of the pressure reducing valve 91 is connected with the main air supply circuit 6, the outlet pressure of the air supply circuit is controlled through the pressure reducing valve 91, the on-off of air transmission of the external air supply circuit is controlled through the two-way valve 92, clean air is filtered out through two-stage filtration, and after the air flow rate is regulated through the fifth speed regulating valve 95, cleaner and safer air sources are provided for air-using equipment such as an air cabin of the hybrid power hydraulic module test platform.

According to the method for building the pneumatic system of the hybrid power hydraulic module test platform, the first silencer 13 and the second silencer 5 are arranged to control noise, so that interference of the generated noise to a test when the pneumatic system operates is eliminated, the requirement of the clamping cylinder 12, the overturning cylinder 32 and the residual oil discharging fork pulling cylinder 43 on no noise when the stroke end is reached is met, and the positioning cylinder 21 with no noise requirement is not connected with a silencer, so that the cost can be further saved on the premise of meeting the test. In this embodiment, the second muffler 5 is also connected to the third electromagnetic directional valve 30 and the fourth electromagnetic directional valve 40 at the same time, so that the number of mufflers used can be reduced, the cost can be further reduced, the occupied space of the muffler can be reduced, and the muffler is allowed to be installed in a narrow space.

The method for building the pneumatic system of the hybrid power hydraulic module test platform further comprises an air filter 7 and a control valve 8, after the air source is connected, oil, water, dust and other impurity particles in the air are removed through the air filter 7, the supply amount of the air source can be controlled through the control valve 8, the flow direction of compressed air can be changed and controlled through an electromagnetic directional valve, further control over operation of each air cylinder is achieved, the speed of the air flowing in the corresponding air cylinder can be adjusted through a speed regulating valve, namely the movement speed of the air cylinder is controlled, different experiment requirements are met, and therefore the pneumatic system can be used for comprehensively researching the pneumatic technology.

The above description is intended to describe in detail the preferred embodiments of the present invention, but the embodiments are not intended to limit the scope of the claims of the present invention, and all equivalent changes and modifications made within the technical spirit of the present invention should fall within the scope of the claims of the present invention.