Static pressure hydraulic station

Abstract

The utility model discloses a static pressure hydraulic station which is at least used for supplying oil to a preset machine tool, the preset machine tool comprises an oil inlet and an oil return groove, and the static pressure hydraulic station comprises an oil tank, an oil supply assembly, an oil return pipeline and a vacuumizing device. The oil tank is used for storing hydraulic oil; the oil supply assembly is connected between the oil tank and the oil inlet through a pipeline assembly and used for conveying hydraulic oil in the oil tank to the oil inlet. The oil return pipeline is connected between the oil return groove and the oil tank, and a port, located at one end of the oil tank, of the oil return pipeline is located above the liquid level of hydraulic oil in the oil tank. The vacuumizing device is connected with the oil tank through a first pipeline, and a port of the end, communicated with the oil tank, of the first pipeline is located above the liquid level of hydraulic oil in the oil tank and used for vacuumizing the oil tank. The static pressure hydraulic station at least solves the problems that hydraulic oil return is not smooth and oil supply of the hydraulic station is insufficient.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic stations, in particular to a static pressure hydraulic station. Background Art

[0002] Liquid hydrostatic technology is a sliding bearing technology that uses liquid static pressure to support loads. Compared with traditional rolling bearings, liquid hydrostatic bearings have the advantages of high transmission efficiency and long service life, so they are widely used in precision mechanical equipment.

[0003] When the hydraulic station is applied to the machine tool, due to the compact structure and low bed of the machine tool, the height difference between the return oil port of the hydrostatic guide rail of the machine tool and the return oil port of the hydraulic station is small, resulting in poor hydraulic oil return, which accumulates in the return oil tank of the machine tool and even overflows the return oil tank. The overflow of hydraulic oil from the return oil tank leads to insufficient hydraulic oil in the hydraulic station tank, resulting in insufficient oil supply to the hydraulic station. Utility Model Content

[0004] The main purpose of the utility model is to provide a static pressure hydraulic station, which at least solves the problems of poor hydraulic oil return and insufficient oil supply of the hydraulic station.

[0005] According to one aspect of the utility model, a hydrostatic hydraulic station is provided, the hydrostatic hydraulic station is used at least to supply oil to a predetermined machine tool, the predetermined machine tool comprises an oil inlet and an oil return tank, the hydrostatic hydraulic station comprises:

[0006] An oil tank, wherein the oil tank is used to store hydraulic oil;

[0007] An oil supply assembly, the oil supply assembly being connected between the oil tank and the oil inlet through a pipeline assembly so as to transport the hydraulic oil in the oil tank to the oil inlet;

[0008] an oil return pipe, the oil return pipe being connected between the oil return groove and the oil tank, and a port of the oil return pipe located at one end of the oil tank being located above the liquid level of the hydraulic oil in the oil tank;

[0009] A vacuum pumping device is connected to the oil tank through a first pipe, and a port at one end of the first pipe connected to the oil tank is located above the liquid level of the hydraulic oil in the oil tank for vacuuming the oil tank.

[0010] Furthermore, the vacuum extraction device includes a vacuum generating device or a vacuum pump.

[0011] Furthermore, a first filter is arranged on the first pipe.

[0012] Furthermore, the oil supply assembly includes an oil supply module and an oil circuit block, and the oil supply module and the oil circuit block are sequentially connected between the oil tank and the oil inlet through the pipeline assembly.

[0013] Further, the pipeline assembly includes a first delivery pipe, a second delivery pipe and a tee pipe, the tee pipe includes a first port, a second port and a third port, the first port is connected to the oil tank; the oil supply module includes a first pump body, a second pump body, a first check valve and a second check valve;

[0014] The inlet end of the first pump body is connected to the oil tank through the first delivery pipe, the outlet end of the first pump body is connected to the second port, the inlet end of the second pump body is connected to the third port, and the outlet end of the second pump body is connected to the inlet end of the oil block through the second delivery pipe;

[0015] The first one-way valve is arranged on the pipe section of the three-way pipe close to the outlet end of the first pump body, and the second one-way valve is arranged on the second delivery pipe.

[0016] Furthermore, the oil supply module also includes a heat exchanger, and the heat exchanger is arranged on a pipe section of the three-way pipe close to the outlet end of the first pump body.

[0017] Furthermore, a second filter is provided on the first delivery pipe.

[0018] Furthermore, a third filter is provided on the second delivery pipe, and a detection device is provided on the third filter.

[0019] Further, the pipeline assembly further comprises a third delivery pipe and a fourth delivery pipe, and the oil circuit block comprises a pressure detection device, a temperature detection device and a pressure relief valve;

[0020] Among them, the pressure detection device and the temperature detection device are respectively arranged on the oil circuit block, one end of the pressure relief valve is connected to the outlet end of the oil circuit block, the other end of the pressure relief valve is connected to the oil tank through the third delivery pipe, and the fourth delivery pipe is connected between the outlet end of the oil circuit block and the oil inlet.

[0021] Furthermore, the pipeline assembly further includes a fifth delivery pipe, and the static pressure hydraulic station further includes an accumulator, and the accumulator is connected to the inlet end of the oil circuit block through the fifth delivery pipe.

[0022] In the utility model, when the hydrostatic hydraulic station supplies oil to a predetermined machine tool, the oil supply assembly can deliver the hydraulic oil stored in the oil tank to the predetermined machine tool through the pipeline assembly, and the hydraulic oil can enter the hydrostatic guide rail of the predetermined machine tool from the oil inlet to assist the predetermined machine tool to complete the work, and the hydraulic oil that has completed the work will flow into the return oil tank of the predetermined machine tool. When the hydrostatic hydraulic station returns oil, the vacuum pumping device is started, and the vacuum pumping device can extract the air inside the oil tank from the oil tank through the first pipeline, thereby generating negative pressure inside the oil tank. The oil tank is connected to the return oil tank through the return oil pipeline, so when negative pressure is generated inside the oil tank, the hydraulic oil in the return oil tank can be pumped back into the oil tank.

[0023] That is to say, compared with the existing hydrostatic hydraulic station, the hydrostatic hydraulic station of the present application can draw the hydraulic oil back into the oil tank through a vacuum device, thereby solving the problem of poor hydraulic oil return and insufficient oil supply of the hydraulic station when the hydrostatic hydraulic station is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 The oil circuit diagram of the static pressure hydraulic station disclosed in the embodiment of the utility model;

[0026] Figure 2 It is a structural diagram of the static pressure hydraulic station disclosed in the embodiment of the utility model from a first perspective;

[0027] Figure 3 It is a structural diagram of the static pressure hydraulic station disclosed in the embodiment of the utility model from a second perspective;

[0028] Figure 4 This is a structural diagram of the static pressure hydraulic station disclosed in the embodiment of the utility model from the third perspective.

[0029] The above drawings include the following reference numerals:

[0030] 10. Oil tank; 20. Oil supply assembly; 21. Oil supply module; 211. First pump body; 212. Second pump body; 213. First non-return valve; 214. Second non-return valve; 215. Heat exchanger; 22. Oil block; 221. Pressure detection device; 222. Temperature detection device; 223. Pressure relief valve; 30. Oil return pipeline; 40. Vacuum extraction device; 41. First pipeline; 42. Vacuum generating device; 43. First filter; 50. Pipeline assembly; 51. First delivery pipe; 52. Second delivery pipe; 53. Third delivery pipe; 54. Fourth delivery pipe; 55. Fifth delivery pipe; 56. Tee; 561. First port; 562. Second port; 563. Third port; 57. Second filter; 58. Third filter; 59. Detection device; 60. Accumulator; 70. Predetermined machine tool; 71. Oil inlet; 72. Oil return tank. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] In order to solve the problems of poor hydraulic oil return and insufficient oil supply in the existing hydrostatic hydraulic station, a hydrostatic hydraulic station is provided according to an embodiment of the present application. The hydrostatic hydraulic station of the present application will be described in detail below in conjunction with the accompanying drawings.

[0035] See also Figures 1 to 4 As shown, according to an embodiment of the utility model, a hydrostatic hydraulic station is provided, which is used at least to supply oil to a predetermined machine tool 70. The predetermined machine tool 70 includes an oil inlet 71 and an oil return groove 72. The hydrostatic hydraulic station of the present application includes an oil tank 10, an oil supply assembly 20, an oil return pipe 30 and a vacuum device 40.

[0036] Among them, the oil tank 10 is used to store hydraulic oil; the oil supply assembly 20 is connected between the oil tank 10 and the oil inlet 71 through the pipeline assembly 50 to transport the hydraulic oil in the oil tank 10 to the oil inlet 71; the return oil pipeline 30 is connected between the return oil groove 72 and the oil tank 10, and the port of the return oil pipeline 30 at one end of the oil tank 10 is located above the liquid level of the hydraulic oil in the oil tank 10; the vacuum device 40 is connected to the oil tank 10 through the first pipeline 41, and the port of one end of the first pipeline 41 connected to the oil tank 10 is located above the liquid level of the hydraulic oil in the oil tank 10 to vacuum the oil tank 10.

[0037] In the present application, when the hydrostatic hydraulic station supplies oil to the predetermined machine tool 70, the oil supply assembly 20 can deliver the hydraulic oil stored in the oil tank 10 to the predetermined machine tool 70 through the pipeline assembly 50, and the hydraulic oil can enter the hydrostatic guide rail (not shown in the figure) of the predetermined machine tool 70 from the oil inlet 71 to assist the predetermined machine tool 70 to complete the work, and the hydraulic oil that has completed the work will flow into the return oil tank 72 of the predetermined machine tool 70. When the hydrostatic hydraulic station returns oil, the vacuum pumping device 40 is started, and the vacuum pumping device 40 can extract the air inside the oil tank 10 from the oil tank 10 through the first pipeline 41, so that negative pressure is generated inside the oil tank 10. The oil tank 10 is connected to the return oil tank 72 through the return oil pipeline 30. Therefore, when negative pressure is generated inside the oil tank 10, the hydraulic oil in the return oil tank 72 can be pumped back into the oil tank 10.

[0038] That is to say, compared with the existing hydrostatic hydraulic station, the hydrostatic hydraulic station of the present application can draw the hydraulic oil back into the oil tank 10 through the vacuum pumping device 40, thereby solving the problem of poor hydraulic oil return and insufficient oil supply of the hydraulic station when the hydrostatic hydraulic station is working.

[0039] Further, see Figure 1 and Figure 2As shown, the vacuum device 40 includes a vacuum generating device 42 or a vacuum pump. Specifically, in the present embodiment, the air inlet of the vacuum generating device 42 is connected to an air supply station (not shown in the figure) through a pipeline, and the air supply station can provide high-speed flowing gas for the vacuum generating device 42. The vacuum port (not shown in the figure) of the vacuum generating device 42 is connected to the inside of the oil tank 10 from the top of the oil tank 10 through a first pipeline 41. Driven by the high-speed flowing gas, the vacuum generating device 42 can gradually extract the air inside the oil tank 10 from the oil tank 10, so that negative pressure is gradually generated inside the oil tank 10. In addition, in another embodiment of the present application, the vacuum device 40 can be a vacuum pump (not shown in the figure). The vacuum pump can directly extract the air inside the oil tank 10 from the oil tank 10, so that negative pressure is gradually generated inside the oil tank 10.

[0040] Further, see Figure 1 and Figure 2 As shown, a first filter 43 is provided on the first pipe 41. Exemplarily, the first filter 43 can be provided in the middle part of the first pipe 41, or can be provided at the end of the first pipe 41. When the vacuum device 40 extracts the air inside the oil tank 10, the air extracted by the vacuum device 40 contains hydraulic oil mist. If the extracted air is directly discharged to the external space of the oil tank 10, it will cause a certain degree of pollution to the environment. Therefore, the first filter 43 is provided on the first pipe 41, so that the oil mist of the hydraulic oil in the extracted air can be filtered out, and then discharged to the external space of the oil tank 10 through the vacuum device 40.

[0041] Further, see Figure 1 As shown, the oil supply assembly 20 includes an oil supply module 21 and an oil circuit block 22, and the oil supply module 21 and the oil circuit block 22 are sequentially connected between the oil tank 10 and the oil inlet 71 through the pipeline assembly 50. Specifically, the oil supply module 21 extracts the hydraulic oil from the inside of the oil tank 10 through the pipeline assembly 50, and the extracted hydraulic oil is transported to the oil circuit block 22 through the pipeline assembly 50. The hydraulic oil coming out of the oil circuit block 22 is then transported to the oil inlet 71 of the predetermined machine tool 70 through the pipeline assembly 50, and the hydraulic oil finally enters the interior of the predetermined machine tool 70 to assist the predetermined machine tool 70 in working.

[0042] Further, see Figure 1 As shown, the pipeline assembly 50 includes a first delivery pipe 51, a second delivery pipe 52 and a three-way pipe 56. The three-way pipe 56 includes a first port 561, a second port 562 and a third port 563, and the first port 561 is connected to the oil tank 10. The oil supply module 21 includes a first pump body 211, a second pump body 212, a first check valve 213 and a second check valve 214.

[0043] The inlet end of the first pump body 211 is connected to the oil tank 10 through the first delivery pipe 51, the outlet end of the first pump body 211 is connected to the second port 562, the inlet end of the second pump body 212 is connected to the third port 563, and the outlet end of the second pump body 212 is connected to the inlet end of the oil circuit block 22 through the second delivery pipe 52. The first check valve 213 is arranged on the pipeline section of the three-way pipe 56 close to the outlet end of the first pump body 211, and the second check valve 214 is arranged on the second delivery pipe 52.

[0044] Exemplarily, the first pump body 211 and the second pump body 212 can be separately arranged and driven by different motors respectively, or can be arranged in duplex and driven by the same motor. This embodiment shows the case where the first pump body 211 and the second pump body 212 are arranged in duplex and driven by the same motor. Specifically, when the hydrostatic hydraulic station supplies oil, first, the first pump body 211, driven by the motor, extracts the hydraulic oil from the inside of the oil tank 10 through the first delivery pipe 51. At this time, the first one-way valve 213 is in a conducting state, and the hydraulic oil enters the three-way pipe 56 from the second port 562 of the three-way pipe 56 through the first one-way valve 213. Then, a part of the hydraulic oil enters the second pump body 212 from the third port 563, and the other part of the hydraulic oil returns to the inside of the oil tank 10 through the first port 561. Finally, the hydraulic oil entering the second pump body 212 is delivered to the second delivery pipe 52 under the pumping of the second pump body 212. At this time, the second one-way valve 214 is in the conducting state, and the hydraulic oil passes through the second one-way valve 214 and then is delivered to the oil circuit block 22 through the second delivery pipe 52. It should be noted that: considering the difference in power between the first pump body 211 and the second pump body 212, when the hydraulic oil output of the first pump body 211 is greater than the hydraulic oil input of the second pump body 212, the hydraulic oil output from the first pump body 211 that cannot be immediately sucked by the second pump body 212 can be returned to the inside of the oil tank 10 from the first port 561 of the three-way pipe 56, which is also a significant advantage of using the three-way pipe 56 in this application. In addition, the first one-way valve 213 and the second one-way valve 214 have the function of one-way conduction. The first one-way valve 213 and the second one-way valve 214 used in this application can prevent the hydraulic oil in the pipeline assembly 50 from flowing back to the oil tank 10. At the same time, when the hydrostatic hydraulic station returns oil, the provision of the first one-way valve 213 and the second one-way valve 214 can also prevent the hydraulic oil from returning to the oil tank 10 via the oil supply assembly 20 .

[0045] Further, see Figures 1 to 4 As shown, the oil supply module 21 further includes a heat exchanger 215 , which is disposed on a pipe section of the three-way pipe 56 close to the outlet end of the first pump body 211 .

[0046] Specifically, in the present application, when the hydrostatic hydraulic station supplies oil, the hydraulic oil sucked by the first pump body 211 is delivered to the heat exchanger 215, and the heat exchanger 215 can cool down the hydraulic oil flowing through the heat exchanger 215. A portion of the cooled hydraulic oil enters the second pump body 212 and is finally delivered to the predetermined machine tool 70, and the other portion returns to the oil tank 10 via the three-way pipe 56. The setting of the heat exchanger 215 can not only prevent the predetermined machine tool 70 from not being able to work normally due to the excessively high temperature of the hydraulic oil, but also play a certain degree of cooling effect on the hydraulic oil in the oil tank 10, thereby preventing the temperature of the oil tank 10 from being too high.

[0047] Further, see Figure 1 As shown, a second filter 57 is provided on the first delivery pipe 51. The second filter 57 can be provided in the middle position of the first delivery pipe 51, or can be provided at the end of the first delivery pipe 51. This embodiment shows that the second filter 57 is provided on the end of the first delivery pipe 51 away from the first pump body 211. When the hydrostatic hydraulic station supplies oil, the hydraulic oil is first filtered through the second filter 57. After the second filter 57 filters the impurities in the hydraulic oil, the filtered hydraulic oil enters the first pump body 211 through the first delivery pipe 51.

[0048] Further, see Figures 1 to 4 As shown, a third filter 58 is disposed on the second delivery pipe 52 , and a detection device 59 is disposed on the third filter 58 .

[0049] Specifically, when the hydrostatic hydraulic station supplies oil, the hydraulic oil output from the second pump body 212 can be filtered through the third filter 58, and the third filter 58 can filter out the remaining impurities in the hydraulic oil, and then deliver it to the oil circuit block 22 through the second delivery pipe 52. In addition, the present application sets a detection device 59 on the third filter 58, and the detection device 59 has the functions of detection and alarm. The detection device 59 can detect the amount of impurity accumulation in the third filter 58 in real time. When the amount of impurity accumulation in the third filter 58 reaches the level that needs to be cleaned, the detection device 59 can issue an alarm to remind the user to clean the impurities in the third filter 58, thereby avoiding the problem that the third filter 58 affects the normal operation of the hydrostatic hydraulic station due to excessive accumulation of impurities.

[0050] The pipeline assembly 50 further includes a third delivery pipe 53 and a fourth delivery pipe 54 , and the oil circuit block 22 includes a pressure detection device 221 , a temperature detection device 222 and a pressure relief valve 223 .

[0051] Among them, the pressure detection device 221 and the temperature detection device 222 are respectively arranged on the oil circuit block 22, one end of the pressure relief valve 223 is connected to the outlet end of the oil circuit block 22, the other end of the pressure relief valve 223 is connected to the oil tank 10 through the third delivery pipe 53, and the fourth delivery pipe 54 is connected between the outlet end of the oil circuit block 22 and the oil inlet 71.

[0052] Specifically, in the present application, when the static pressure hydraulic station supplies oil, the pressure relief valve 223 is in a blocking state. The pressure detection device 221 can detect the pressure of the hydraulic oil in the oil circuit block 22, and the user can reasonably adjust the pressure of the hydraulic oil in the oil circuit block 22 according to the pressure value measured on the pressure detection device 221. When the hydraulic oil pressure value measured by the pressure detection device 221 is too large, the user can control the pressure relief valve 223 to be in a conducting state to transport part of the hydraulic oil in the oil circuit block 22 back to the oil tank 10 through the third delivery pipe 53. When the hydraulic oil pressure value measured by the pressure detection device 221 is too small, the user can reasonably adjust the pressure of the hydraulic oil by increasing the power of the first pump body 211 or the second pump body 212, and can also make reasonable adjustments by using hydraulic oil with a larger static pressure. In addition, the temperature detection device 222 can detect the temperature of the hydraulic oil in the oil block 22. When the hydraulic oil pressure temperature measured by the temperature detection device 222 is too high, the user can reduce the temperature of the hydraulic oil by increasing the heat dissipation power of the heat exchanger 215 or installing a heat sink (not shown) on the outer surface of the oil tank 10. Finally, the hydraulic oil from the outlet end of the oil block 22 is delivered to the predetermined machine tool 70 through the fourth delivery pipe 54.

[0053] Further, see Figures 1 to 4 As shown, the pipeline assembly 50 further includes a fifth delivery pipe 55 , and the static pressure hydraulic station further includes an accumulator 60 , which is connected to the inlet end of the oil circuit block 22 through the fifth delivery pipe 55 .

[0054] Specifically, when the hydrostatic hydraulic station supplies oil, if the pressure of the hydraulic oil in the oil supply assembly 20 is too high, the accumulator 60 is in a storage state to store part of the pressure of the hydraulic oil. If the pressure of the hydraulic oil in the oil supply assembly 20 is too low, the accumulator 60 is in a release state to increase the pressure of the hydraulic oil in the oil supply assembly 20, so that the hydrostatic hydraulic station can supply oil normally. In addition, the accumulator 60 also has the functions of buffering and shock absorption, emergency energy supply and energy saving.

[0055] From the above statements, it can be known that the present application can solve the problems of poor hydraulic oil return and insufficient oil supply in the hydraulic station by setting up a hydrostatic hydraulic station composed of an oil tank 10, an oil supply assembly 20, an oil return pipe 30, a vacuum pumping device 40, a pipe assembly 50 and an accumulator 60. The hydrostatic hydraulic station of the present application is provided with a vacuum pumping device 40 on the hydraulic station to vacuum the interior of the oil tank 10, and the hydraulic oil in the oil return tank 72 of the predetermined machine tool 70 is drawn back to the oil tank 10 through the oil return pipe 30 by the vacuum. The embarrassing situation that the hydraulic oil in the oil return tank 72 overflows the oil return tank 72 due to the untimely oil return of the hydraulic station is avoided, thereby solving the problem of insufficient oil supply in the hydrostatic hydraulic station due to insufficient hydraulic oil in the oil tank 10.

[0056] It can be seen that the hydrostatic hydraulic station of the present application optimizes the design of the previous hydrostatic hydraulic station, and cleverly utilizes the effect of atmospheric pressure by adding a vacuum pumping device 40 to draw the hydraulic oil in the return oil tank 72 back to the oil tank 10, and has the advantages of simple structure, easy maintenance and low cost.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydrostatic hydraulic station, the hydrostatic hydraulic station being used at least to supply oil to a predetermined machine tool (70), the predetermined machine tool (70) comprising an oil inlet (71) and an oil return tank (72), characterized in that: The static pressure hydraulic station comprises: An oil tank (10), wherein the oil tank (10) is used to store hydraulic oil; an oil supply assembly (20), the oil supply assembly (20) being connected between the oil tank (10) and the oil inlet (71) via a pipeline assembly (50) so as to transport the hydraulic oil in the oil tank (10) to the oil inlet (71); an oil return pipe (30), the oil return pipe (30) being connected between the oil return groove (72) and the oil tank (10), and a port of the oil return pipe (30) located at one end of the oil tank (10) being located above the liquid level of the hydraulic oil in the oil tank (10); A vacuum pumping device (40) is connected to the oil tank (10) via a first pipe (41), and a port at one end of the first pipe (41) communicating with the oil tank (10) is located above the liquid level of the hydraulic oil in the oil tank (10) so as to vacuum the oil tank (10).

2. The hydrostatic hydraulic station according to claim 1, characterized in that: The vacuum extraction device (40) includes a vacuum generating device (42) or a vacuum pump.

3. The hydrostatic hydraulic station according to claim 1, characterized in that: The first pipe (41) is provided with a first filter (43).

4. The hydrostatic hydraulic station according to claim 1, characterized in that: The oil supply assembly (20) comprises an oil supply module (21) and an oil passage block (22); the oil supply module (21) and the oil passage block (22) are sequentially connected between the oil tank (10) and the oil inlet (71) via the pipeline assembly (50).

5. The hydrostatic hydraulic station according to claim 4, characterized in that: The pipeline assembly (50) comprises a first delivery pipe (51), a second delivery pipe (52) and a three-way pipe (56); the three-way pipe (56) comprises a first port (561), a second port (562) and a third port (563); the first port (561) is connected to the oil tank (10); the oil supply module (21) comprises a first pump body (211), a second pump body (212), a first one-way valve (213) and a second one-way valve (214); The inlet end of the first pump body (211) is connected to the oil tank (10) through the first delivery pipe (51), the outlet end of the first pump body (211) is connected to the second port (562), the inlet end of the second pump body (212) is connected to the third port (563), and the outlet end of the second pump body (212) is connected to the inlet end of the oil circuit block (22) through the second delivery pipe (52); The first one-way valve (213) is arranged on a pipe section of the three-way pipe (56) close to the outlet end of the first pump body (211), and the second one-way valve (214) is arranged on the second delivery pipe (52).

6. The hydrostatic hydraulic station according to claim 5, characterized in that: The oil supply module (21) further comprises a heat exchanger (215), and the heat exchanger (215) is arranged on a pipe section of the three-way pipe (56) close to the outlet end of the first pump body (211).

7. The hydrostatic hydraulic station according to claim 5, characterized in that: The first delivery pipe (51) is provided with a second filter (57).

8. The hydrostatic hydraulic station according to claim 5, characterized in that: The second conveying pipe (52) is provided with a third filter (58), and the third filter (58) is provided with a detection device (59).

9. The hydrostatic hydraulic station according to claim 5, characterized in that: The pipeline assembly (50) further comprises a third delivery pipe (53) and a fourth delivery pipe (54), and the oil circuit block (22) comprises a pressure detection device (221), a temperature detection device (222) and a pressure relief valve (223); The pressure detection device (221) and the temperature detection device (222) are respectively arranged on the oil circuit block (22); one end of the pressure relief valve (223) is connected to the outlet end of the oil circuit block (22); the other end of the pressure relief valve (223) is connected to the oil tank (10) through the third delivery pipe (53); and the fourth delivery pipe (54) is connected between the outlet end of the oil circuit block (22) and the oil inlet (71).

10. The hydrostatic hydraulic station according to claim 9, characterized in that: The pipeline assembly (50) further comprises a fifth delivery pipe (55), and the static pressure hydraulic station further comprises an accumulator (60), wherein the accumulator (60) is connected to the inlet end of the oil circuit block (22) through the fifth delivery pipe (55).

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