阅读说明：本技术 一种节能双驱动耦合动态作动器 (Energy-saving dual-drive coupling dynamic actuator ) 是由 郭玉宝 谷春华 姬战国 孙宝瑞 尹廷林 陈云超 于 2021-08-02 设计创作，主要内容包括：本发明公开了一种节能双驱动耦合动态作动器,包括做功组件和蓄能组件,做功组件包括活塞杆、第一液压作动器和第二液压作动器,活塞杆设置为第一液压作动器同轴使用的活塞杆,第一液压作动器与第二液压作动器通过管道串联安装,第一液压作动器邻近活塞杆的油腔设置为第一加载缸,第二液压作动器邻近活塞杆的油腔设置为第二加载缸,蓄能组件包括第一蓄能器、第二蓄能器和两个固定架,第一蓄能器和第二蓄能器分别安装在两个固定架上方,第一蓄能器、第一液压作动器、第二蓄能器和第二液压作动器均通过管道互相连接。本发明中对加载缸发生的微小均值力变化进行补充,从而达到总体加载力不变的功能,进而减少能耗。(The invention discloses an energy-saving dual-drive coupling dynamic actuator, which comprises a working assembly and an energy storage assembly, wherein the working assembly comprises a piston rod, a first hydraulic actuator and a second hydraulic actuator, the piston rod is a piston rod coaxially used by the first hydraulic actuator, the first hydraulic actuator and the second hydraulic actuator are installed in series through a pipeline, an oil cavity of the first hydraulic actuator, which is adjacent to the piston rod, is provided with a first loading cylinder, an oil cavity of the second hydraulic actuator, which is adjacent to the piston rod, is provided with a second loading cylinder, the energy storage assembly comprises a first energy accumulator, a second energy accumulator and two fixing frames, the first energy accumulator and the second energy accumulator are respectively installed above the two fixing frames, and the first energy accumulator, the first hydraulic actuator, the second energy accumulator and the second hydraulic actuator are all mutually connected through pipelines. The invention supplements the tiny mean force change of the loading cylinder, thereby achieving the function of keeping the total loading force unchanged and further reducing the energy consumption.)

1. An energy efficient dual drive coupled dynamic actuator, comprising:

a working assembly (100), wherein the working assembly (100) comprises a piston rod (110), a first hydraulic actuator (120) and a second hydraulic actuator (130), the piston rod (110) is arranged to be a piston rod coaxially used by the first hydraulic actuator (120) and the second hydraulic actuator (130), the first hydraulic actuator (120) and the second hydraulic actuator (130) are installed in series through a pipeline, an oil cavity of the first hydraulic actuator (120) adjacent to the piston rod (110) is arranged to be a first loading cylinder (140), and an oil cavity of the second hydraulic actuator (130) adjacent to the piston rod (110) is arranged to be a second loading cylinder (150);

energy storage subassembly (200), energy storage subassembly (200) includes first energy storage ware (210), second energy storage ware (220) and two mount (230), first energy storage ware (210) with second energy storage ware (220) are installed two respectively mount (230) top, first energy storage ware (210), first hydraulic actuator (120) second energy storage ware (220) with second hydraulic actuator (103) all interconnect through the pipeline.

2. The energy efficient dual drive coupled dynamic actuator of claim 1, wherein: one end of the first hydraulic actuator (120) is connected with a plurality of first oil cavity pipelines (370), the first oil cavity pipelines (370) are connected with a first outer pipeline (350), and the tail end of the first outer pipeline (350) is connected with the first energy accumulator (210).

3. The energy efficient dual drive coupled dynamic actuator of claim 1, wherein: one end of the second hydraulic actuator (130) is connected with a plurality of second oil cavity pipelines (380), the second oil cavity pipelines (380) are connected with a second outer pipeline (360) together, and the tail end of the second outer pipeline (360) is connected with the second energy accumulator (220).

4. The energy efficient dual drive coupled dynamic actuator of claim 1, wherein: a plurality of overflow pipelines are arranged between the first hydraulic actuator (120) and the second hydraulic actuator (130).

5. The energy efficient dual drive coupled dynamic actuator of claim 4, wherein: the overflow assemblies (300) are arranged, each overflow assembly (300) comprises a first overflow pipe (310), a second overflow pipe (320) and a third overflow pipe (330), one end of each first overflow pipe (310) is communicated with the outer cavity of the corresponding first loading cylinder (140), the other end of each first overflow pipe (310) is communicated with the corresponding second loading cylinder (150), one end of each second overflow pipe (320) is communicated with the inner cavity of the corresponding first loading cylinder (140), the other end of each second overflow pipe (320) is communicated with the outer cavity of the corresponding second loading cylinder (150), one end of each third overflow pipe (330) is communicated with the inner cavity of the corresponding first loading cylinder (140), and the other end of each third overflow pipe (330) is communicated with the outer cavity of the corresponding second loading cylinder (150).

6. The energy efficient dual drive coupled dynamic actuator of claim 5, wherein: the first overflow pipe (310) has a load sensor (340) and a control valve (390) mounted on its conduit adjacent to the second loading cylinder (150).

7. The energy efficient dual drive coupled dynamic actuator of claim 5, wherein: and a pressure gauge (391) is arranged on the pipeline of the second overflow pipe (320).

Technical Field

The invention relates to the technical field of actuators, in particular to an energy-saving dual-drive coupling dynamic actuator.

Background

When a mechanical test is carried out, because the tonnage of the test force demand value is very large, if the actuator of the test system adopts a conventional mode, namely a single large hydraulic actuator provides test force for the test system under the coordination and servo control of hydraulic oil, the structure needs the diameter of an oil cylinder, a system valve and flow to be very large, so that the economy of the test system is poor, and the energy consumption is too high.

The invention discloses a Chinese invention with the publication number of CN201779089U, which discloses a double-energy-storage inner-type and outer-type plunger oil cylinder, comprising an outer oil cylinder, an oil cylinder cover and an outer plunger rod, wherein an oil cylinder cavity is arranged between the outer oil cylinder and the outer plunger rod, an outer plunger sealing element is arranged at the matching part of the outer oil cylinder and the outer plunger rod, an inner plunger rod is arranged in an inner cavity of the outer plunger rod, an outer plunger cavity is arranged between the outer plunger rod and the inner plunger rod, the outer plunger cavity is communicated with an inner oil delivery hole in the inner plunger rod, the inner oil delivery hole in the inner plunger rod is connected with an oil pipe A and is communicated with an energy accumulator No. 1 through a control valve group, and the oil pipe connected with an oil accumulator No. 2 and an oil pump through the control valve group. As shown in fig. 6, the main feature is that the inner plunger rod is arranged in the inner cavity of the outer plunger rod; and secondly, two groups of energy accumulators, namely an energy accumulator 1 and an energy accumulator 2, are adopted, the energy of the two groups of energy accumulators is stored by utilizing pressure oil released from a plunger piston of an oil cylinder when the elevator descends, all the energy is stored for free, and when the elevator ascends, the two groups of energy accumulators of the energy accumulator 1 and the energy accumulator 2 release energy simultaneously.

The above-mentioned existing oil cylinder and the mode that the energy storage ware cooperateed and use have realized the basic effect of the energy conversion of energy storage ware, but do not discern the accurate pressure of oil cylinder and keep pressure control. In order to achieve the purpose of energy conservation, the structure of an actuator is required to be changed by improving the existing structure, a series connection mode of two actuators is adopted, and an external energy accumulator is required to perform pressure compensation.

Disclosure of Invention

The invention aims to provide an energy-saving dual-drive coupling dynamic actuator to solve the problems of poor economy and high energy consumption of a test system in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an energy-saving dual-drive coupling dynamic actuator comprises a working component and an energy storage component.

The working assembly comprises a piston rod, a first hydraulic actuator and a second hydraulic actuator, the piston rod is arranged to be the piston rod coaxially used by the first hydraulic actuator, the first hydraulic actuator and the second hydraulic actuator are installed in series through a pipeline, an oil cavity of the first hydraulic actuator, which is adjacent to the piston rod, is arranged to be a first loading cylinder, and an oil cavity of the second hydraulic actuator, which is adjacent to the piston rod, is arranged to be a second loading cylinder;

the energy storage component comprises a first energy accumulator, a second energy accumulator and two fixing frames, the first energy accumulator and the second energy accumulator are respectively arranged above the two fixing frames, and the first energy accumulator, the first hydraulic actuator, the second energy accumulator and the second hydraulic actuator are all connected with each other through pipelines.

In one embodiment of the present invention, one end of the first hydraulic actuator is connected to a plurality of first oil chamber pipelines, the plurality of first oil chamber pipelines are commonly connected to a first outer pipeline, and the tail end of the first outer pipeline is connected to the first accumulator.

In one embodiment of the present invention, one end of the second hydraulic actuator is connected to a plurality of second oil chamber pipes, the plurality of second oil chamber pipes are commonly connected to a second outer pipe, and the tail end of the second outer pipe is connected to the second accumulator.

In one embodiment of the present invention, a plurality of relief conduits are disposed between the first hydraulic actuator and the second hydraulic actuator.

In one embodiment of the invention, the overflow pipelines are arranged as an overflow assembly, the overflow assembly comprises a first overflow pipe, a second overflow pipe and a third overflow pipe, one end of the first overflow pipe is communicated with the outer cavity of the first loading cylinder, the other end of the first overflow pipe is communicated with the second loading cylinder, one end of the second overflow pipe is communicated with the inner cavity of the first loading cylinder, the other end of the second overflow pipe is communicated with the outer cavity of the second loading cylinder, one end of the third overflow pipe is communicated with the inner cavity of the first loading cylinder, and the other end of the third overflow pipe is communicated with the outer cavity of the second loading cylinder.

In one embodiment of the invention, the first overflow tube has a load cell and control valve mounted on the tube adjacent the second loading cylinder.

In one embodiment of the invention, a pressure gauge is mounted on the conduit of the second overflow tube.

In summary, due to the adoption of the technology, the invention has the beneficial effects that:

in the invention, the first loading cylinder is added to the required mean value, the first energy accumulator and the second energy accumulator are simultaneously filled with hydraulic oil, after the numerical value is stabilized, the second loading cylinder is adopted for amplitude loading, because the first loading cylinder and the second loading cylinder use the same piston rod, when the second loading cylinder is loaded, the piston rod of the first loading cylinder can move, the volume of the front cavity and the rear cavity of the first loading cylinder is changed, so that the pressure of the front cavity and the rear cavity of the first loading cylinder is changed, because the front cavity and the rear cavity of the first loading cylinder are respectively connected with the first energy accumulator and the second energy accumulator, the two energy accumulators respectively balance the pressure of the front cavity and the rear cavity of the first loading cylinder, the pressure of the front cavity and the rear cavity is only slightly changed under the condition that the piston cylinder moves, so that the loaded mean value of the first loading cylinder is only slightly changed, meanwhile, the second loading cylinder supplements the small mean force change of the first loading cylinder, so that the function of keeping the total loading force unchanged is achieved, and the energy consumption is reduced;

when the first tonnage actuator is subjected to a tensile test and reaches the limit, the piston can move towards the rear part at a high speed when a test piece is broken, the pressure in an oil cavity of the second tonnage actuator rises sharply at the moment, meanwhile, the second loading cylinder discharges redundant pressure to the second energy accumulator, the safety of the second tonnage actuator is guaranteed, and meanwhile, when the first tonnage actuator is subjected to a reverse test, the safety of the second tonnage actuator is guaranteed by adopting the mode.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional perspective view of the present invention;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic side view of the present invention;

FIG. 5 is a schematic view of an overflow assembly of the present invention;

fig. 6 is a prior art schematic diagram of the background of the invention.

In the figure: 100. a work applying component; 110. a piston rod; 120. a first hydraulic actuator; 130. a second hydraulic actuator; 140. a first loading cylinder; 150. a second loading cylinder; 200. an energy storage assembly; 210. a first accumulator; 220. a second accumulator; 230. a fixed mount; 300. an overflow assembly; 310. a first overflow pipe; 320. a second overflow tube; 330. a third overflow pipe; 340. a load sensor; 350. a first outer line; 360. a second outer pipe; 370. a first oil cavity conduit; 380. a second oil cavity conduit; 390. a control valve; 391. and a pressure gauge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating an orientation or positional relationship are based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art from the specification.

Example 1

Referring to fig. 1 to 5, the invention provides an energy-saving dual-drive coupling dynamic actuator, which includes a working assembly 100 and an energy storage assembly 200, wherein the working assembly 100 is used for providing a test force to a test system under the coordination and servo control of hydraulic oil, and the energy storage assembly 200 is used for storing energy and reducing energy consumption generated during working.

Work assembly 100 includes a piston rod 110, a first hydraulic actuator 120, and a second hydraulic actuator 130, where piston rod 110 is configured as a piston rod for use with first hydraulic actuator 120 and second hydraulic actuator 130 coaxially, first hydraulic actuator 120 and second hydraulic actuator 130 are mounted in series via a conduit, an oil chamber of first hydraulic actuator 120 adjacent to piston rod 110 is configured as a first loading cylinder 140, and an oil chamber of second hydraulic actuator 130 adjacent to piston rod 110 is configured as a second loading cylinder 150. Wherein the first hydraulic actuator 120 is configured as a large tonnage actuator and the second hydraulic actuator 130 is configured as a small tonnage actuator.

The large and small tonnage actuators are connected in series, share the same piston rod 110, and the two oil inlet cavities of the large tonnage actuators are additionally connected with an energy storage assembly 200 respectively except a normal oil path. The tonnage value of the large-tonnage actuator is A, the dynamic force can be generated +/-A, and the tonnage value of the small-tonnage actuator is B, the dynamic force can be generated +/-B. The dynamic force value C can be obtained by combining the two, the dynamic force value requirement of the dynamic force value C of the required dynamic force value in a test system can be realized, and the C is A + B.

The energy storage assembly 200 includes a first energy storage device 210, a second energy storage device 220 and two fixing brackets 230, the first energy storage device 210 and the second energy storage device 220 are respectively installed above the two fixing brackets 230, and the first energy storage device 210, the first hydraulic actuator 120, the second energy storage device 220 and the second hydraulic actuator 103 are all connected with each other through pipes.

The first accumulator 210 and the second accumulator 220 respectively balance the pressures of the front and rear chambers of the first loading cylinder 140, so that the pressures of the front and rear chambers only slightly change under the condition that the piston cylinder moves, thereby maintaining that the mean force loaded by the first loading cylinder 140 only slightly changes, and meanwhile, the second loading cylinder 150 performs closed-loop control on the load through a high-speed response controller, so as to supplement the change of the small mean force generated by the first loading cylinder 140, thereby achieving the function of keeping the total loading force unchanged.

Specifically, one end of the first hydraulic actuator 120 is connected to a plurality of first oil chamber pipelines 370, the plurality of first oil chamber pipelines 370 are connected to a first outer pipeline 350, and the tail end of the first outer pipeline 350 is connected to the first accumulator 210. One end of the second hydraulic actuator 130 is connected with a plurality of second oil chamber pipelines 380, the plurality of second oil chamber pipelines 380 are connected with a second outer pipeline 360 together, and the tail end of the second outer pipeline 360 is connected with the second accumulator 220.

Referring to fig. 3, a plurality of overflow pipes are disposed between the first hydraulic actuator 120 and the second hydraulic actuator 130. Referring to fig. 5, a plurality of overflow pipes are provided as the overflow assembly 300, the overflow assembly 300 includes a first overflow pipe 310, a second overflow pipe 320, and a third overflow pipe 330, one end of the first overflow pipe 310 communicates with the outer chamber of the first loading cylinder 140, the other end of the first overflow pipe 310 communicates with the second loading cylinder 150, one end of the second overflow pipe 320 communicates with the inner chamber of the first loading cylinder 140, the other end of the second overflow pipe 320 communicates with the outer chamber of the second loading cylinder 150, one end of the third overflow pipe 330 communicates with the inner chamber of the first loading cylinder 140, and the other end of the third overflow pipe 330 communicates with the outer chamber of the second loading cylinder 150.

The first overflow pipe 310 has a load sensor 340 and a control valve 390 mounted on its piping adjacent to the second loading cylinder 150 for overflow. The conduit of the second overflow pipe 320 is fitted with a pressure gauge 391 for knowing the internal pressure of the two loading cylinders and sending a signal to the processor and controller.

When the large-tonnage actuator is controlled by the load sensor 340 to keep a rated output value A, and the small-tonnage actuator in the same direction is loaded to a rated output value B, the pressure value in the oil cavity of the large-tonnage actuator can be changed when the small-tonnage actuator is loaded, and the total force generated at the moment is not equal to C, so that the error is avoided.

The first loading cylinder 140 is added to the required average value, the first accumulator 210 and the second accumulator 220 are filled with hydraulic oil, after the value of the load sensor 340 is stabilized, the second loading cylinder 150 is used for loading the amplitude, and because the same piston rod 110 is used for the first loading cylinder 140 and the second loading cylinder 150, when the second loading cylinder 150 is loaded, the piston rod 110 of the first loading cylinder 140 moves, so that the volume of the front cavity and the rear cavity of the first loading cylinder 140 is changed, and the pressure of the front cavity and the rear cavity of the first loading cylinder 140 is changed. Since the front and rear chambers of the first loading cylinder 140 are respectively connected to the first accumulator 210 and the second accumulator 220, the two accumulators respectively balance the pressures of the front and rear chambers of the first loading cylinder 140, so that the pressures of the front and rear chambers only slightly change when the piston cylinder moves, thereby maintaining that the average force loaded by the first loading cylinder 140 only slightly changes.

Meanwhile, the second loading cylinder 150 supplements the small mean force change of the first loading cylinder 140 through the closed-loop control of the control valve 390 and the load sensor 340, so as to achieve the function of keeping the total loading force unchanged.

The relationship between the pressures in the front and rear chambers of the first loading cylinder 140 and the volumes of the first accumulator 210 and the second accumulator 220 during the loading process is calculated by the following formula:

ΔP＝P2-P1②

in the test, because of the big effort of equipment, the testpieces can produce very big impact force to the actuator when breaking, destroys the actuator very easily. The bidirectional overflow device is designed, so that the actuator can be protected. When the large-tonnage actuator is subjected to a tensile test and reaches the limit, the piston of the test piece moves towards the rear part at a high speed at the moment of fracture, the pressure in an oil cavity of the small-tonnage actuator rises sharply at the moment, meanwhile, the control valve 390 on the small-tonnage actuator is opened, redundant pressure overflows, the safety of the small-tonnage actuator is ensured, and meanwhile, when the large-tonnage actuator is subjected to a reverse test, the control valve 390 on the small-tonnage actuator towards the other direction also adopts the mode to ensure the safety of the small-tonnage actuator.

Meanwhile, the system adopts two sets of independent high-response digital control and sampling intelligent controllers, the closed-loop control and data acquisition frequency is adjustable, signals of the load sensor 340 and the displacement sensor can be stably switched between the two controllers according to the test process, and accurate coordination control of the mean value and the amplitude value in the static test and the combined dynamic test is realized.

The working principle is as follows: when the loading device is used, the first loading cylinder 140 is added to a required average value, meanwhile, the first energy accumulator 210 and the second energy accumulator 220 are filled with hydraulic oil, after the numerical value of the load sensor 340 is stabilized, the second loading cylinder 150 is used for loading the amplitude, because the same piston rod 110 is used for the first loading cylinder 140 and the second loading cylinder 150, when the second loading cylinder 150 is used for loading, the piston rod 110 of the first loading cylinder 140 can move, so that the front cavity volume and the rear cavity volume of the first loading cylinder 140 are changed, and the front cavity pressure and the rear cavity pressure of the first loading cylinder 140 are changed. Because the front and rear cavities of the first loading cylinder 140 are respectively connected to the first accumulator 210 and the second accumulator 220, the two accumulators respectively balance the pressures of the front and rear cavities of the first loading cylinder 140, so that the pressures of the front and rear cavities only slightly change under the condition of piston cylinder movement, thereby maintaining that the mean force loaded by the first loading cylinder 140 only slightly changes, and meanwhile, the second loading cylinder 150 supplements the small mean force change of the first loading cylinder 140 through the closed-loop control of the control valve 390 and the load sensor 340, thereby achieving the function of keeping the total loading force unchanged.

It should be noted that: the model specifications of the load sensor 340, the pressure gauge 391 and the control valve 390 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art, so detailed description is omitted.

The load sensor 340, pressure gauge 391 and control valve 390, their power supply and their principle will be clear to the skilled person and will not be described in detail here.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.