阅读说明：本技术 一种恒压变容式气动系统储气装置 (Constant-pressure variable-volume type pneumatic system gas storage device ) 是由 王志文 王虎 熊伟 童郑人 董欣 于 2020-04-21 设计创作，主要内容包括：本发明提供一种恒压变容式气动系统储气装置,恒压储气气缸的无杆腔侧用于接收来自空压机的压缩空气并向用气回路输出恒压压缩空气；受压气缸的无杆腔侧密封有压缩惰性气体；所述异形凸轮为中空结构；所述异形凸轮设置有豁口Ⅰ和豁口Ⅱ,所述豁口Ⅰ包括限位边Ⅰ以及曲线滑动边,活塞杆Ⅰ端部设置横杆Ⅰ,所述横杆Ⅰ两端分别位于两个所述豁口Ⅰ内且能够沿所述曲线滑动边滑动；所述豁口Ⅱ包括限位边Ⅱ以及直线滑动边,所述受压气缸的活塞杆Ⅱ端部设置横杆Ⅱ,所述横杆Ⅱ两端分别位于两个所述豁口Ⅱ内且能够沿所述直线滑动边滑动。本发明的技术方案解决了传统定容式储气罐功能单一,无法实现恒压输出压缩空气特性,不能满足降压节能需求的问题。(The invention provides a constant-pressure variable-volume pneumatic system air storage device.A rodless cavity side of a constant-pressure air storage cylinder is used for receiving compressed air from an air compressor and outputting constant-pressure compressed air to an air use loop; compressed inert gas is sealed at the side of the rodless cavity of the pressurized cylinder; the special-shaped cam is of a hollow structure; the special-shaped cam is provided with a gap I and a gap II, the gap I comprises a limiting edge I and a curve sliding edge, a cross rod I is arranged at the end part of a piston rod I, and two ends of the cross rod I are respectively positioned in the two gaps I and can slide along the curve sliding edge; opening II includes spacing limit II and the limit that slides of straight line, II tip of the piston rod of pressurized cylinder set up horizontal pole II, II both ends of horizontal pole are located two respectively in opening II and can follow the limit that slides of straight line. The technical scheme of the invention solves the problems that the traditional constant volume type air storage tank has single function, cannot realize the characteristic of outputting compressed air at constant pressure and cannot meet the requirements of pressure reduction and energy conservation.)

1. A constant-pressure variable-volume type pneumatic system air storage device is characterized by comprising a constant-pressure air storage cylinder, a pressure cylinder and a special-shaped cam;

the rodless cavity side of the constant-pressure air storage cylinder is a compressed air storage area and is used for receiving compressed air from an air compressor and outputting constant-pressure compressed air to an air using loop;

compressed inert gas is sealed at the side of the rodless cavity of the pressurized cylinder;

the special-shaped cam is of a hollow structure, and the constant-pressure air storage cylinder and the pressure cylinder are respectively arranged on two sides of the special-shaped cam;

the special-shaped cam is provided with two centrosymmetric notches I towards one end of the constant-pressure gas storage cylinder, each notch I comprises a limiting edge I parallel to a piston rod I of the constant-pressure gas storage cylinder and a curved sliding edge, the end part of the piston rod I is provided with a cross rod I perpendicular to the piston rod I, and two ends of the cross rod I are respectively positioned in the two notches I and can slide along the curved sliding edges;

one end, facing the compressed air cylinder, of the special-shaped cam is provided with two centrosymmetric notches II, each notch II comprises a limiting edge II parallel to the piston rod II of the compressed air cylinder and a linear sliding edge, the end part of the piston rod II is provided with a cross rod II perpendicular to the piston rod II, and two ends of the cross rod II are respectively located in the two notches II and can slide along the linear sliding edges;

and the positions of the opening I and the opening II correspond one to one.

2. The air storage device of the constant-pressure variable-volume pneumatic system according to claim 1, wherein the shaped cam satisfies the following relation:

wherein theta is a corner of the special-shaped cam; k is a radical of₁The slope of a tangent line at a certain point on the sliding edge of the curve; k is a radical of₂Is the slope of the linear sliding edge; r is the special-shaped camThe radius of rotation of (a); p is a radical of_close0Pre-charging the pressurized cylinder with an inert gas pressure value; v. of_close0A volume of inert gas pre-charged into the pressurized cylinder; p_openThe air pressure value of the constant-pressure compressed air required to be output in the constant-pressure air storage cylinder is obtained; n is a polytropic exponent; the cross-sectional area of the constant-pressure air storage cylinder is equal to that of the pressure cylinder, and the piston area of the constant-pressure air storage cylinder is equal to that of the pressure cylinder, namely A in the formula.

3. The air storage device of claim 1, wherein the compressed air storage area is provided with two air passage through holes, namely an air inlet communicated with an air compressor and an air outlet communicated with an air using loop; the air inlet is used for receiving compressed air from an air compressor, and the air outlet is used for outputting constant-pressure compressed air to the air using loop; one side of the rod cavity of the constant-pressure gas storage cylinder is directly communicated with the atmosphere.

4. The air storage device of the constant-pressure variable-volume pneumatic system according to claim 1, wherein a sealable air passage hole is provided on the rodless chamber side of the pressurized cylinder, and compressed air is introduced into the rodless chamber of the pressurized cylinder through the air passage hole before the air passage hole is sealed; and a rod cavity of the pressurized cylinder is directly communicated with the atmosphere.

Technical Field

The invention relates to the technical field of mechanical components, in particular to a constant-pressure variable-volume type pneumatic system gas storage device.

Background

The pneumatic technology uses compressed air as a working medium, the air is cheap, but the compressed air is an expensive energy carrier, a large amount of electric energy is consumed for producing the compressed air, and 50% -85% of the electric energy is wasted in the form of heat energy. In whole pneumatic system, need obtain the great compressed air of pressure through the air compressor machine, with compressed air storage in the gas holder, then through the relief pressure valve, send compressed air into the working gas circuit again, it is located between air compressor machine and the relief pressure valve that the pressure interval that is the highest among the pneumatic system is seen, the air compressor machine increases air pressure, and the relief pressure valve reduces compressed air pressure and stabilizes at the required pressure value of working gas circuit, and the centre must have the gas holder to compressed air storage buffering. During the change of the pressure of the compressed air from high to low, the consumption of energy is increased. The most ideal situation is that the gas production side pressure is equal to the gas use side pressure, while the traditional constant volume gas storage tank is mainly used for storing gas, buffering and stabilizing pressure and separating impurities, so that the dynamic balance of the gas production side and the gas use side in a pneumatic system cannot be realized, and ideal pressure reduction and energy saving cannot be realized.

The method for realizing depressurization and energy conservation which is researched at present mainly realizes the near real-time balance of compressed air and flow at a gas production side and a gas utilization side through advanced control of an air compressor (cluster), but the actual application effect of the constant-pressure variable energy-saving control of the current pneumatic system is not ideal, and the following four defects mainly exist: (1) the pressure flow prediction algorithm is not accurate enough, the core of the advanced control technology lies in the high-precision pressure flow prediction algorithm, but no good prediction algorithm is proposed at present; (2) the control technology has no universality, the existing compressor (cluster) control technology has poor universality, and the practical application limit conditions are more; (3) the heavy large-volume air storage tank is used, the traditional air storage tank in the constant-pressure variable control system has low air storage pressure and low energy density, and the air storage tank with the capacity much larger than that of the traditional control system is required to meet the requirement of intermittent large-flow working condition; (4) the compressed air production cost is high, and most of small and medium-sized enterprises still do not realize that the high cost of the compressed air production is the absolute dominant factor of the total cost of the whole life cycle of the pneumatic system.

Disclosure of Invention

According to the technical problems that the traditional constant-volume air storage tank is single in function, cannot realize the characteristic of outputting compressed air at constant pressure and cannot meet the requirements of pressure reduction and energy conservation, the constant-pressure variable-volume air storage device of the pneumatic system is provided. The invention mainly uses the special-shaped cam to realize constant pressure variable capacity gas storage, can realize pressure reduction and energy saving of a pneumatic system without a high-level control mode, and can replace the traditional constant volume gas storage tank.

The technical means adopted by the invention are as follows:

a constant-pressure variable-volume type pneumatic system air storage device comprises a constant-pressure air storage cylinder, a pressure cylinder and a special-shaped cam;

the rodless cavity side of the constant-pressure air storage cylinder is a compressed air storage area and is used for receiving compressed air from an air compressor and outputting constant-pressure compressed air to an air using loop;

compressed inert gas is sealed at the side of the rodless cavity of the pressurized cylinder;

the special-shaped cam is of a hollow structure, and the constant-pressure air storage cylinder and the pressure cylinder are respectively arranged on two sides of the special-shaped cam;

the special-shaped cam is provided with two centrosymmetric openings I towards one end of the constant-pressure gas storage cylinder, each opening I comprises a limiting edge I parallel to a piston rod I of the constant-pressure gas storage cylinder and a curved sliding edge, the end part of the piston rod I is provided with a cross rod I perpendicular to the piston rod I, and two ends of the cross rod I are respectively positioned in the two openings I and can slide along the curved sliding edges;

one end, facing the compressed air cylinder, of the special-shaped cam is provided with two centrosymmetric notches II, each notch II comprises a limiting edge II parallel to the piston rod II of the compressed air cylinder and a linear sliding edge, the end part of the piston rod II is provided with a cross rod II perpendicular to the piston rod II, and two ends of the cross rod II are respectively located in the two notches II and can slide along the linear sliding edges;

and the positions of the opening I and the opening II correspond one to one.

Further, the special-shaped cam satisfies the following relational expression:

wherein theta is a corner of the special-shaped cam; k is a radical of₁The slope of a tangent line of a certain point on the sliding edge of the curve; k is a radical of₂Is the slope of the linear sliding edge; r is the rotating radius of the special-shaped cam; p is a radical of_close0Pre-charging the pressurized cylinder with an inert gas pressure value; v. of_close0A volume of pre-charged inert gas in the pressurized cylinder; p_openThe air pressure value of the constant-pressure compressed air required to be output in the constant-pressure air storage cylinder is obtained; n is a polytropic exponent; the cross-sectional area of the constant-pressure air storage cylinder is equal to that of the pressure cylinder, and the piston area of the constant-pressure air storage cylinder is equal to that of the pressure cylinder, namely A in the formula.

Furthermore, the compressed air storage area is provided with two air path through holes which are respectively an air inlet communicated with the air compressor and an air outlet communicated with the air using loop; the air inlet is used for receiving compressed air from an air compressor, and the air outlet is used for outputting constant-pressure compressed air to the air using loop; one side of the rod cavity of the constant-pressure air storage cylinder is directly communicated with the atmosphere.

Furthermore, a gas path through hole which can be sealed is arranged at the side of the rodless cavity of the pressure cylinder, and compressed air is introduced into the rodless cavity of the pressure cylinder through the gas path through hole before the gas path through hole is sealed; and a rod cavity of the pressurized cylinder is directly communicated with the atmosphere.

Compared with the prior art, the invention has the following advantages:

the constant-pressure variable-volume type pneumatic system gas storage device provided by the invention can replace the traditional constant-volume type gas storage tank to complete the functions of gas storage, pressure buffering and stabilization and impurity separation; the invention can realize pressure reduction and energy saving without using a traditional constant volume type air storage tank and adding a high-level control method, increases the capacity of outputting compressed air at constant pressure compared with the traditional constant volume type air storage tank, can meet the pressure reduction and energy saving requirements of a pneumatic system at the present stage only by using a simple two-position control method, has simple structure, is easy to upgrade the traditional constant volume type air storage tank into the product of the invention, and meets the requirements of medium and small enterprises for completing product transformation and upgrading at extremely low cost.

In conclusion, the technical scheme of the invention realizes constant-pressure variable-volume gas storage by using the special-shaped cam, can realize pressure reduction and energy saving of a pneumatic system without a high-level control mode, and can replace the traditional constant-volume gas storage tank. Therefore, the technical scheme of the invention solves the problems that the traditional constant volume type air storage tank has single function, cannot realize the characteristic of outputting compressed air at constant pressure, and cannot meet the requirements of pressure reduction and energy conservation.

Based on the reasons, the invention can be widely popularized in the fields of energy storage, pneumatic energy conservation and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the constant-pressure variable-volume pneumatic gas storage device of the present invention.

Fig. 2 is a longitudinal sectional view of the constant-pressure variable-volume pneumatic gas storage device according to the present invention.

Fig. 3 is a schematic structural diagram of the special-shaped cam of the invention.

In the figure: 1. a constant pressure gas storage cylinder; 2. a piston rod I; 3. a shaped cam; 4. a piston rod II; 5. A pressurized cylinder; 6. a cross bar I; 7. a limiting edge I; 8. a curved sliding edge; 9. a cross bar II; 10. a limiting edge II; 11. a linear sliding edge.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and further it is to be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Also, it should be understood that the dimensions of the various features shown in the drawings are not drawn to scale in practice for ease of illustration. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion of it is not necessary in subsequent figures.

In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings for the convenience of description and simplicity of description, and that the directional terms do not indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation without being described to the contrary, and therefore, should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.