CN219888412U

CN219888412U - Distributed electrohydraulic actuator

Info

Publication number: CN219888412U
Application number: CN202321039817.0U
Authority: CN
Inventors: 丁孺琦; 李青波; 赵杨; 蒋涵琦; 郭言
Original assignee: Jiangsu Hengli Hydraulic Technology Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Technology Co Ltd
Priority date: 2023-05-05
Filing date: 2023-05-05
Publication date: 2023-10-24
Anticipated expiration: 2033-05-05

Abstract

The utility model discloses a distributed electrohydraulic executing device, comprising: the motor body is sleeved with a water-cooling shell, a cooling liquid inlet and a shell cooling loop are arranged on the water-cooling shell, and the cooling liquid inlet is communicated with the shell cooling loop; the valve block is connected with one end of the water-cooled shell, a valve block cooling loop is arranged in the valve block, and the valve block cooling loop is communicated with the shell cooling loop; and the plunger pump is arranged in the valve block and is connected with the motor body. According to the utility model, through improvement of the heat dissipation structure, hydraulic oil in the electrohydraulic actuator can be rapidly cooled, so that the execution precision and the service life of a hydraulic system are improved.

Description

Distributed electrohydraulic actuator

Technical Field

The utility model relates to the technical field of electrohydraulic execution devices, in particular to a distributed electrohydraulic execution device and a heat dissipation method thereof.

Background

The electrohydraulic actuator is an actuator which converts standard input signals into angular displacement output moment or linear displacement output force corresponding to the input signals through electrohydraulic conversion and hydraulic amplification. Currently, in order to improve the integration level of various engineering machines and reduce the connection dew point of pipelines in a system, and in order to reduce the time of hysteresis response among all components as much as possible, electro-hydraulic actuators are also developing in the direction of compact designs.

Although the traditional electrohydraulic actuator well accords with the development direction in the aspect of compact structure, the heat productivity among all parts of the traditional electrohydraulic actuator is large, and the intervals among the parts are small, so that the traditional electrohydraulic actuator has poor heat dissipation performance and serious local heat accumulation, thereby causing the rapid rise of the temperature of hydraulic oil in a hydraulic system and greatly influencing the working state of the system; also, excessive temperatures can reduce the useful life between components in the system.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to solve the technical problem that the existing electrohydraulic actuator is poor in heat dissipation effect. The distributed electro-hydraulic execution device and the heat dissipation method thereof can quickly cool hydraulic oil in the electro-hydraulic execution device through improvement of a heat dissipation structure, so that execution accuracy of a hydraulic system is improved, and service life of the hydraulic system is prolonged.

The technical scheme adopted for solving the technical problems is as follows: a distributed electro-hydraulic execution device, comprising:

the motor comprises a motor body, wherein a water-cooling shell is sleeved outside the motor body, a cooling liquid inlet and a shell cooling loop are arranged on the water-cooling shell, and the cooling liquid inlet is communicated with the shell cooling loop;

the valve block is connected with one end of the water-cooled shell, a valve block cooling loop is arranged in the valve block, and the valve block cooling loop is communicated with the shell cooling loop;

the plunger pump is arranged in the valve block and is connected with the motor body.

Further, the casing cooling circuit is spiral, and the valve block cooling circuit comprises a first cooling channel which is communicated with one end of the casing cooling circuit.

Further, the valve block cooling circuit further includes: the second cooling channel is communicated with the first cooling channel, the third cooling channel is communicated with the second cooling channel, the fourth cooling channel is communicated with the third cooling channel, and the fourth cooling channel is communicated with a cooling liquid outlet on the valve block.

Further, the first cooling channel, the second cooling channel, the third cooling channel, and the fourth cooling channel are disposed around the plunger pump.

Further, a first hydraulic oil cooling channel is further arranged on the water-cooling shell, one end of the first hydraulic oil cooling channel is communicated with the inner cavity of the water-cooling shell, and the other end of the first hydraulic oil cooling channel is communicated with the valve block.

Further, a second hydraulic oil cooling channel, a third hydraulic oil cooling channel and a hydraulic oil outlet are further arranged in the valve block, the second hydraulic oil cooling channel is communicated with the other end of the first hydraulic oil cooling channel, one end of the third hydraulic oil cooling channel is communicated with the second hydraulic oil cooling channel, and the other end of the third hydraulic oil cooling channel is communicated with the hydraulic oil outlet.

Further, an installation cavity is formed in the valve block, the plunger pump is installed in the installation cavity, and one end of the plunger pump is communicated with the inner cavity.

Further, one end of the plunger pump is provided with a mounting flange, and after the plunger pump is installed in the mounting cavity, the mounting flange is fixedly connected with the valve block so as to fix the plunger pump.

Further, the method further comprises the following steps: the hydraulic cylinder is located at the bottom of the valve block, a rodless cavity oil port and a rod cavity oil port are further formed in the valve block, the rodless cavity oil port is communicated with a rodless cavity of the hydraulic cylinder, and the rod cavity oil port is communicated with a rod cavity of the hydraulic cylinder.

The utility model has the beneficial effects that the motor and the plunger pump can be cooled by improving the internal structure of the electro-hydraulic actuating device; compared with the natural convection heat dissipation mode of the traditional electrohydraulic actuator, the heat exchange efficiency of the utility model is greatly increased, the problems of poor heat dissipation performance and rapid rise of oil temperature caused by local heat accumulation due to integrated layout are solved, and the service lives of the motor and the pipelines in the system are prolonged.

Drawings

The present utility model will be further described with reference to the drawings and examples.

FIG. 1 is a perspective view of a distributed electro-hydraulic actuator of the present utility model.

FIG. 2 is a cross-sectional view of a distributed electro-hydraulic actuator of the present utility model.

FIG. 3 is a partial cross-sectional view of a distributed electro-hydraulic actuator of the present utility model.

Fig. 4 is a schematic diagram of a valve block cooling circuit of the present utility model.

Fig. 5 is a schematic view of a first hydraulic oil cooling passage of the present utility model.

Fig. 6 is a schematic view of a second hydraulic oil cooling passage of the present utility model.

Fig. 7 is a schematic view of a third hydraulic oil cooling passage of the present utility model.

Fig. 8 is a perspective view of the plunger pump of the present utility model.

In the figure: 1. a motor body; 2. a water-cooled shell; 3. a valve block; 4. a plunger pump; 5. a hydraulic cylinder; 21. a cooling liquid inlet; 22. a cabinet cooling circuit; 23. a first hydraulic oil cooling passage; 24. an inner cavity; 31. a valve block cooling circuit; 32. a second hydraulic oil cooling passage; 33. a third hydraulic oil cooling passage; 34. a hydraulic oil outlet; 35. a mounting cavity; 36. an oil port of the rodless cavity; 37. the oil port of the rod cavity is arranged; 38. a cooling liquid outlet; 311. a first cooling channel; 312. a second cooling channel; 313. a third cooling channel; 314. a fourth cooling channel; 41. and (5) mounting a flange.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 8, the distributed electro-hydraulic actuator of the present utility model includes: the motor comprises a motor body 1, a water-cooling shell 2, a valve block 3 and a plunger pump 4, wherein the water-cooling shell 2 is sleeved outside the motor body 1, a cooling liquid inlet 21 and a shell cooling loop 22 are arranged on the water-cooling shell 2, the cooling liquid inlet 21 is communicated with the shell cooling loop 22, the valve block 3 is connected with one end of the water-cooling shell 2, a valve block cooling loop 31 is arranged in the valve block 3, the valve block cooling loop 31 is communicated with the shell cooling loop 22, the plunger pump 4 is arranged in the valve block 3, and the plunger pump 4 is connected with the motor body 1. After the cooling liquid enters the shell cooling circuit 22 from the cooling liquid inlet 21, the hydraulic oil in the water-cooled shell 2 and the hydraulic oil in the motor body 1 can be cooled, and then the cooling liquid enters the valve block cooling circuit 31 through the shell cooling circuit 22, and the hydraulic oil in the plunger pump 4 can be cooled. Therefore, on one hand, the heat dissipation effect and the heat dissipation efficiency can be remarkably improved, and on the other hand, the plunger pump 4 is integrated in the valve block 3, so that the compactness of the electro-hydraulic execution device can be further improved, the cooling path can be shortened, and the cooling effect can be further improved.

For example, the casing cooling circuit 22 is spiral, and the valve block cooling circuit 31 includes a first cooling passage 311, and the first cooling passage 311 communicates with one end of the casing cooling circuit 22. From this, can realize the intercommunication between casing cooling circuit 22 and the valve piece cooling circuit 31 to, the cooling circuit of spiral can more comprehensive cool down motor body 1's hydraulic oil, is favorable to promoting the cooling effect.

The valve block cooling circuit 31 further includes: a second cooling channel 312, a third cooling channel 313 and a fourth cooling channel 314, the second cooling channel 312 being in communication with the first cooling channel 311, the third cooling channel 313 being in communication with the second cooling channel 312, the fourth cooling channel 314 being in communication with the third cooling channel 313, the fourth cooling channel 314 being in communication with the cooling fluid outlet 38 on the valve block 3. In other words, the cooling fluid flows from the cooling fluid outlet 38 after passing through the casing cooling circuit 22, the first cooling channel 311, the second cooling channel 312, the third cooling channel 313, and the fourth cooling channel 314 in order from the cooling fluid inlet 21, and in this process, the cooling fluid can simultaneously cool the hydraulic oil of the motor body 1 and the hydraulic oil of the plunger pump 4. According to the utility model, through improving the cooling loop structure, the heat dissipation effect and the heat dissipation efficiency can be improved, and the utilization rate of the cooling liquid can be improved.

The first cooling passage 311, the second cooling passage 312, the third cooling passage 313, and the fourth cooling passage 314 are provided around the plunger pump 4. Thus, when the coolant passes through the first cooling passage 311, the second cooling passage 312, the third cooling passage 313, and the fourth cooling passage 314, the hydraulic oil of the plunger pump 4 can be sufficiently cooled, and the cooling rate can be increased.

For example, the water-cooled casing 2 is further provided with a first hydraulic oil cooling channel 23, one end of the first hydraulic oil cooling channel 23 is communicated with an inner cavity 24 of the water-cooled casing 2, and the other end of the first hydraulic oil cooling channel 23 is communicated with the valve block 3. The valve block 3 is also internally provided with a second hydraulic oil cooling channel 32, a third hydraulic oil cooling channel 33 and a hydraulic oil outlet 34, the second hydraulic oil cooling channel 32 is communicated with the other end of the first hydraulic oil cooling channel 23, one end of the third hydraulic oil cooling channel 33 is communicated with the second hydraulic oil cooling channel 32, and the other end of the third hydraulic oil cooling channel 33 is communicated with the hydraulic oil outlet 34. The shaft end of the plunger pump 4 is not provided with a sealing structure, that is, the hydraulic oil of the plunger pump 4 can enter the first hydraulic oil cooling channel 23 through the inner cavity 24 of the water-cooling shell 2 and then returns to the oil tank from the hydraulic oil outlet 34 for cooling after passing through the second hydraulic oil cooling channel 32 and the third hydraulic oil cooling channel 33.

The distributed electro-hydraulic execution device can cool the hydraulic oil of the motor body 1 and the plunger pump 4 through the cooling loop, can realize heat exchange between the hydraulic oil and the outside through the hydraulic oil cooling channel, and can realize more efficient heat balance through the combination of the two aspects, thereby improving the problems of poor heat dissipation performance and concentrated local heat of the electro-hydraulic execution mechanism.

Specifically, a mounting cavity 35 is arranged in the valve block 3, the plunger pump 4 is mounted in the mounting cavity 35, and one end of the plunger pump 4 is communicated with the inner cavity 24. One end of the plunger pump 4 is provided with a mounting flange 41, and when the plunger pump 4 is installed in the mounting cavity 35, the mounting flange 41 is fixedly connected with the valve block 3 to fix the plunger pump 4. In this way, the plunger pump 4 can be integrated with the valve block 3, and compared with the existing electro-hydraulic actuating mechanism (the plunger pump is arranged between the motor and the valve block), the electro-hydraulic actuating mechanism not only can reduce the volume, improve the compactness of the device, but also can reduce the connection leakage points of pipelines in the electro-hydraulic actuating mechanism and shorten the lengths of a cooling loop and a cooling channel.

The distributed electro-hydraulic execution device of the utility model further comprises: the hydraulic cylinder 5, the hydraulic cylinder 5 is located the valve piece 3 bottom, still is equipped with rodless chamber hydraulic fluid port 36 and has pole chamber hydraulic fluid port 37 on the valve piece 3, and rodless chamber hydraulic fluid port 36 is linked together with the rodless chamber of hydraulic cylinder 5, has pole chamber hydraulic fluid port 37 to be linked together with the pole chamber of hydraulic cylinder 5. The hydraulic cylinder 5 is able to compensate for the asymmetric flow in the hydraulic circuit and the oil leaking out of the plunger pump 4.

The heat dissipation process of the utility model is that,

s1, cooling liquid enters the shell cooling loop 22 from the cooling liquid inlet 21, and at the moment, the cooling liquid can cool hydraulic oil in the motor body 1 and the water-cooled shell 2. The coolant enters the valve block cooling circuit 31 through the casing cooling circuit 22, and at this time, the hydraulic oil of the plunger pump 4 can be cooled. Step S3, the coolant is returned from the coolant outlet 38 to the external cooling device. S4, repeating the steps S1 to S3 to realize the circulation cooling of the distributed electro-hydraulic executing device. The heat dissipation process further comprises the following steps: the hydraulic oil of the plunger pump 4 enters the inner cavity 24 and then returns to the oil tank through the first hydraulic oil cooling channel 23, the second hydraulic oil cooling channel 32, the third hydraulic oil cooling channel 33 and the hydraulic oil outlet 34 to realize cooling.

In other words, the cooling of the hydraulic oil according to the present utility model comprises two ways, namely passive cooling (corresponding to the cooling circuit) and active cooling (corresponding to the hydraulic oil cooling channel). The passive cooling process is that the cooling liquid enters the shell cooling circuit 22 and the valve block cooling circuit 31 from the cooling liquid inlet 21, the hydraulic oil on the motor side and the hydraulic oil on the plunger pump 4 side are cooled in sequence, and finally the cooling liquid flows back into the external cooling device. The active cooling process is that the hydraulic oil at the plunger pump 4 side can enter the inner cavity 24, the hydraulic oil at the motor side is also in the inner cavity 24, the inner cavity 24 is communicated with the first hydraulic oil cooling channel 23, and the hydraulic oil in the electrohydraulic actuator can return to the oil tank through the first hydraulic oil cooling channel 23, the second hydraulic oil cooling channel 32, the third hydraulic oil cooling channel 33 and the hydraulic oil outlet 34 to realize cooling. The two heat dissipation modes can be parallel, so that the heat dissipation efficiency and the heat dissipation performance of the electro-hydraulic execution device are greatly improved, and the temperature of the motor body 1 can be remarkably reduced, so that the motor can select larger input power when in operation.

In summary, the distributed electro-hydraulic execution device of the utility model has at least the following advantages:

1. according to the utility model, through improving the internal structure of the electrohydraulic actuator, the motor and the plunger pump can be cooled; compared with the natural convection heat dissipation mode of the traditional electrohydraulic actuator, the heat exchange efficiency of the utility model is greatly increased, the problems of poor heat dissipation performance and rapid rise of oil temperature caused by local heat accumulation due to integrated layout are solved, and the service lives of the motor and the pipelines in the system are prolonged.

2. According to the utility model, through integrating two heat dissipation modes, the heat balance of the whole mechanism can be ensured, the heat dissipation efficiency of the motor body 1 and the plunger pump 4 is greatly improved, and the temperature of the motor body 1 is remarkably reduced, so that a larger input power range can be selected when the motor works.

3. When the plunger pump is installed, the installation flange 41 of the plunger pump 4 is connected with the installation surface of the valve block 3 through the bolts, so that the integration level of the device is higher, meanwhile, the pipeline connection leakage point is reduced, and the length of a control oil duct is shortened.

With the above-described preferred embodiments according to the present utility model as a teaching, the worker can make various changes and modifications without departing from the scope of the technical idea. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims

1. A distributed electro-hydraulic execution device, comprising:

the motor comprises a motor body (1), wherein a water-cooling machine shell (2) is sleeved outside the motor body (1), a cooling liquid inlet (21) and a machine shell cooling loop (22) are arranged on the water-cooling machine shell (2), and the cooling liquid inlet (21) is communicated with the machine shell cooling loop (22);

the valve block (3), the said valve block (3) is connected with one end of the said water-cooled chassis (2), there is a valve block cooling circuit (31) in the said valve block (3), the said valve block cooling circuit (31) is linked with the said chassis cooling circuit (22);

the plunger pump (4), the plunger pump (4) is installed in the valve block (3), and the plunger pump (4) is connected with the motor body (1).

2. The distributed electro-hydraulic actuator of claim 1, wherein the housing cooling circuit (22) is spiral, and the valve block cooling circuit (31) includes a first cooling passage (311), the first cooling passage (311) being in communication with one end of the housing cooling circuit (22).

3. The distributed electro-hydraulic execution apparatus of claim 2, wherein the valve block cooling circuit (31) further comprises: -a second cooling channel (312), a third cooling channel (313) and a fourth cooling channel (314), said second cooling channel (312) being in communication with said first cooling channel (311), said third cooling channel (313) being in communication with said second cooling channel (312), said fourth cooling channel (314) being in communication with said third cooling channel (313), said fourth cooling channel (314) being in communication with a cooling fluid outlet (38) on said valve block (3).

4. A distributed electro-hydraulic actuator according to claim 3, wherein the first cooling channel (311), the second cooling channel (312), the third cooling channel (313) and the fourth cooling channel (314) are arranged around the plunger pump (4).

5. The distributed electro-hydraulic execution device according to claim 1, wherein the water-cooled casing (2) is further provided with a first hydraulic oil cooling channel (23), one end of the first hydraulic oil cooling channel (23) is communicated with an inner cavity (24) of the water-cooled casing (2), and the other end of the first hydraulic oil cooling channel (23) is communicated with the valve block (3).

6. The distributed electro-hydraulic execution device according to claim 5, wherein a second hydraulic oil cooling channel (32), a third hydraulic oil cooling channel (33) and a hydraulic oil outlet (34) are further arranged in the valve block (3), the second hydraulic oil cooling channel (32) is communicated with the other end of the first hydraulic oil cooling channel (23), one end of the third hydraulic oil cooling channel (33) is communicated with the second hydraulic oil cooling channel (32), and the other end of the third hydraulic oil cooling channel (33) is communicated with the hydraulic oil outlet (34).

7. The distributed electro-hydraulic actuator according to claim 5, wherein a mounting cavity (35) is provided in the valve block (3), the plunger pump (4) is mounted in the mounting cavity (35), and one end of the plunger pump (4) is communicated with the inner cavity (24).

8. The distributed electro-hydraulic actuator according to claim 7, wherein one end of the plunger pump (4) is provided with a mounting flange (41), and the mounting flange (41) is fixedly connected with the valve block (3) to fix the plunger pump (4) after the plunger pump (4) is installed in the mounting cavity (35).

9. The distributed electro-hydraulic execution apparatus of claim 1, further comprising: the hydraulic cylinder (5), pneumatic cylinder (5) are located valve piece (3) bottom, still be equipped with rodless chamber hydraulic fluid port (36) and have pole chamber hydraulic fluid port (37) on valve piece (3), rodless chamber hydraulic fluid port (36) with the rodless chamber of pneumatic cylinder (5) is linked together, have pole chamber hydraulic fluid port (37) with the pole chamber of pneumatic cylinder (5) is linked together.