A dual-drive vacuum compression device and a drive control method

Abstract

The present invention relates to the technical field of vacuum equipment, and discloses a dual-drive vacuum compression device, which includes a main machine housing. A dual-drive vacuum pump device and an oil-water cooling system are arranged inside the main machine housing. Since this device adopts a dual-drive vacuum pump device, during operation, the working noise of compression can be reduced. Meanwhile, under the action of an improved muffler, the working noise of the entire device is significantly reduced by 10%. Moreover, by using the drive control method of the present invention, the drive speeds of the two motors can be more reasonably allocated, enabling the two vacuum pumps to maintain a better compression balance, thereby improving the working efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum compression, and in particular to a dual-drive vacuum compression device and a drive control method thereof. Background Art

[0002] In the field of vacuum compression, it is quite common to use a motor to drive a vacuum pump for vacuuming operations. Most of the existing vacuuming devices use a single motor to drive a vacuum pump to extract air to form a vacuum. And in current devices, there is also a technology of using a single motor to drive two vacuum pumps for two-stage vacuuming. This kind of device has better vacuuming efficiency compared with the single-stage vacuuming technology. However, the existing vacuum compression devices still have the problem of excessive noise. In view of this, the inventor has made a new invention. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-drive vacuum compression device to reduce the operating noise of the device, and at the same time provide a drive control method to improve the working efficiency of the device for the deficiencies of the existing technology.

[0004] To achieve the above purpose, a dual-drive vacuum compression device of the present invention includes a main machine housing. A dual-drive vacuum pump device and an oil-water cooling system are arranged inside the main machine housing. A storage tank is arranged on one side of the main machine housing. The storage tank is connected to the dual-drive vacuum pump device through a first pipeline. A silencer is arranged on the other side of the main machine housing. The dual-drive vacuum pump device is connected to the silencer through a second pipeline. It further includes a control device. The dual-drive vacuum pump device is electrically connected to the control device. The control device includes a display control screen.

[0005] Further, the dual-drive vacuum pump device includes a first base. A first vacuum pump and a second vacuum pump are sequentially arranged on the first base. The first vacuum pump is provided with an air inlet a and an air outlet a. The second vacuum pump is provided with an air inlet b and an air outlet b. The air outlet a is communicated with the air inlet b. Above the first vacuum pump and the second vacuum pump, there is a second base. The second base is provided with a first motor for driving the first vacuum pump and a second motor for driving the second vacuum pump. The control device controls the first motor and the second motor.

[0006] Preferably, the air outlet a is arranged on the upper surface of the first vacuum pump, and the air inlet b is arranged on the upper surface of the second vacuum pump.

[0007] Preferably, the second base is provided with air holes corresponding to the air outlet a and the air inlet b one by one. It further includes an air hood. The air hood is connected to the second base and forms an air flow communication channel for the two air holes.

[0008] Preferably, a first sensor is provided on the first pipeline, and a second sensor is provided at the air outlet a.

[0009] Furthermore, the silencer includes a device housing, and also includes a sound-absorbing inner housing disposed inside the device housing. A concrete layer is filled between the sound-absorbing inner housing and the device housing. The sound-absorbing inner housing is provided with a primary sound-absorbing cavity and a secondary sound-absorbing cavity communicating with the primary sound-absorbing cavity. A noise reflection device is provided in the primary sound-absorbing cavity. Gas-liquid noise is transmitted from the primary sound-absorbing cavity to the secondary sound-absorbing cavity. The secondary sound-absorbing cavity is provided with a first water filter pipe; the bottom of the device housing is provided with an air inlet pipe and a drain pipe communicating with the primary sound-absorbing cavity.

[0010] Preferably, the noise reflection device includes a first reflection tile and a second reflection tile. The concave surface of the first reflection tile faces the air inlet pipe and air gaps are reserved on both sides. The second reflection tile is symmetrically arranged with the first reflection tile.

[0011] Preferably, the air duct is connected with a final-stage silencer.

[0012] Furthermore, the oil-water cooling system includes a radiator and a fan for accelerating the air flow of the radiator. The radiator is provided with at least a first cooling chamber and a second cooling chamber. The first cooling chamber is respectively connected with a first cooling water pipe and a second cooling water pipe; the second cooling chamber is connected with an oil pipeline conveying device.

[0013] The present invention also provides a driving control method for a vacuum compression device, which is characterized by including the following control steps:

[0014] S1. The control device obtains the air flow pressure value N1 before the first-stage compression through the first sensor;

[0015] S2. The control device automatically distributes a preset first-stage air flow negative pressure value M1 and a second-stage air flow negative pressure value M2 according to the air flow pressure value N1;

[0016] S3. The control device adjusts the rotation speed S1 of the first-stage compression motor according to the first-stage air flow negative pressure value M1, and adjusts the rotation speed S2 of the second-stage compression motor according to the second-stage air flow negative pressure value M2;

[0017] S4. The control device obtains the air flow pressure value N2 after the first-stage compression through the second sensor;

[0018] S5. When the value of N2 exceeds the negative pressure value range of M1, the control device corrects the rotation speed S2 of the second-stage compression motor.

[0019] Beneficial effects: Compared with the prior art, a dual-drive vacuum compression device of the present invention includes a main machine housing, a dual-drive vacuum pump device and an oil-water cooling system are arranged in the main machine housing, a storage tank is arranged on one side of the main machine housing, the storage tank is connected to the dual-drive vacuum pump device through a first pipeline, a silencer is arranged on the other side of the main machine housing, and the dual-drive vacuum pump device is connected to the silencer through a second pipeline; a control device is also included, the dual-drive vacuum pump device is electrically connected to the control device, and the control device includes a display control screen; since this device adopts a dual-drive vacuum pump device, during operation, the working noise of compression can be reduced. At the same time, under the action of the improved silencer, the working noise of the entire device is significantly reduced by 10%. And by using the drive control method of the present invention, the driving speeds of the two motors can be more reasonably distributed, so that the two vacuum pumps can maintain a better compression balance, thereby improving the working efficiency. Brief Description of the Drawings

[0020] Figure 1 It is an overall assembly drawing of the invention device.

[0021] Figure 2 It is a perspective view of the dual-drive vacuum pump device of the present invention.

[0022] Figure 3 It is an exploded view of the structure of the dual-drive vacuum pump device of the present invention.

[0023] Figure 4 It is a perspective view of the silencer of the present invention.

[0024] Figure 5 It is a cross-sectional view of the silencer of the present invention.

[0025] Figure 6 It is a schematic structural diagram of the first reflection tile of the present invention.

[0026] Figure 7 It is an application diagram of the oil-water cooling system of the present invention.

[0027] Figure 8 It is a schematic structural diagram of the radiator of the present invention.

[0028] The reference numerals include:

[0029] Main body housing - 1, first pipeline - 11, second pipeline - 12, storage tank - 4, dual - drive vacuum pump device - 2, first base - 21, first vacuum pump - 22, air inlet a - 221, air outlet a - 222, second vacuum pump - 23, air inlet b - 231, air outlet b - 232, second base - 24, first support frame - 241, second support frame - 242, air hole - 243, first motor - 25, second motor - 26, air hood - 27, hood body - 271, skirt - 272;

[0030] Silencer - 3, device housing - 31, intake pipe - 311, drain pipe - 312, air guide pipe - 313, second filter water pipe - 314, sound - proof inner shell - 32, concrete layer - 321, primary sound - proof cavity - 33, secondary sound - proof cavity - 34, first filter water pipe - 341, noise reflection device - 35, first reflection tile - 351, second reflection tile - 352, notch - 353, sound - filtering cylinder - 36, tertiary sound - proof cavity - 37, conversion cavity a - 381, conversion cavity b - 382, final - stage silencer - 39, silencer housing - 391, exhaust port - 392, first sound - proof board - 393, second sound - proof board - 394;

[0031] Oil - water cooling system - 5, radiator - 51, first cooling chamber - 511, second cooling chamber - 512, fan - 52, first cooling water pipe - 53, second cooling water pipe - 54, oil - path conveying device - 55, first cooling oil pipe - 551, second cooling oil pipe - 552, oil pump - 553, filter - 554, first fin group - 561, second fin group - 562, first heat - dissipating pipe - 563, second heat - dissipating pipe - 564, dust - proof net - 57; Filter valve - 6, water container - 7. Detailed implementation mode

[0032] The following combines the attached Figures 1 to 8 to elaborate on the present invention in detail.

[0033] A dual-drive vacuum compression device of the present invention includes a main body housing 1. Inside the main body housing 1, there are arranged a dual-drive vacuum pump device 2 and an oil-water cooling system 5. On one side of the main body housing, there is a storage tank. The storage tank 4 is connected to the dual-drive vacuum pump device through a first pipeline 11. On the other side of the main body housing, there is a silencer 3. The dual-drive vacuum pump device 2 is connected to the silencer through a second pipeline 12. It also includes a control device. The dual-drive vacuum pump device is electrically connected to the control device. The control device includes a display control screen. This device is mainly used to provide a negative pressure adsorption force and is applied to generate negative pressure adsorption in pulp production enterprises. During operation, after using negative pressure adsorption, the negative pressure value in the storage tank 4 decreases. The storage tank can be conveniently docked with the working negative pressure pipeline. More importantly, it can be used to store the water generated by negative pressure adsorption. A drain port or pipeline is arranged at the bottom of the storage tank to discharge excessive water. The dual-drive vacuum pump device compresses the airflow in the storage tank through the first pipeline, so as to keep the required negative pressure value in the storage tank. It is preferably to install a filter valve 6 at the inlet end of the first pipeline to filter impurities in the airflow, thus avoiding the entry of impurities into the vacuum pump and causing damage to mechanical parts. The airflow compressed by the dual-drive vacuum pump device enters the silencer for noise elimination.

[0034] Since this device adopts a dual-drive vacuum pump device, during operation, the working noise of compression can be reduced. At the same time, under the action of the improved silencer, the working noise of the whole device is significantly reduced by 10%.

[0035] The dual-drive vacuum pump device 2 includes a first base 21. The first base 21 is preferably formed by metal casting to reduce machining and material waste. The first base 21 is successively provided with a first vacuum pump 22 and a second vacuum pump 23. The first vacuum pump 22 is provided with an air inlet a221 and an air outlet a222. The second vacuum pump 23 is provided with an air inlet b231 and an air outlet b232. The air outlet a222 is communicated with the air inlet b231. Above the first vacuum pump 22 and the second vacuum pump 23, there is a second base 24. The second base 24 is provided with a first motor 25 for driving the first vacuum pump 22 and a second motor 26 for driving the second vacuum pump 23. The control device controls the first motor 25 and the second motor 26. During operation of this device, the control device respectively controls the first motor 25 to drive the first vacuum pump 22 for primary compression according to different negative pressure values, and then controls the second motor 26 to drive the second vacuum pump 23 for secondary compression. The advantage of this structure is that it can reduce the resonance of the device, reduce the running noise, and avoid the idling phenomenon of a single motor driving a double vacuum pump.

[0036] In this technical solution, the second base 24 is fixedly connected to the first vacuum pump 22 and the second vacuum pump 23 by bolts. Fixing the second base 24 to the first vacuum pump 22 and the second vacuum pump 23 by bolts is not only convenient for installation and disassembly, but also has a good fixing effect.

[0037] Specifically, a first support frame 241 and a second support frame 242 are connected above the second base 24. The first motor 25 is fixedly arranged on the first support frame 241, and the second motor 26 is fixedly arranged on the second support frame 242. The motors are fixed respectively by using the two support frames, and it is beneficial for the air supply hood 27 or the pipeline below the motors to connect the air outlet a222 and the air inlet b231.

[0038] In this embodiment, the air outlet a222 is arranged on the upper surface of the first vacuum pump 22, and the air inlet b231 is arranged on the upper surface of the second vacuum pump 23. The second base 24 is provided with air holes 243 corresponding to the air outlet a222 and the air inlet b231 one by one. It further includes an air hood 27. The air hood 27 is connected to the second base 24 and forms an air flow communication channel for the two air holes 243. This connection method using the air hood 27 can save space utilization to the greatest extent, and is also beneficial for connecting and fixing the two vacuum pumps, thereby forming an upper and lower clamping fixation and making the two vacuum pumps form a compact whole.

[0039] More preferably, the air hood 27 includes a hood body 271 and a skirt 272 arranged at the edge of the hood body 271. A sealing member is arranged between the skirt 272 and the second base 24. The skirt 272 is provided with screw holes for connecting to the second base 24. The middle of the hood body 271 is hollow, which is convenient for gas to pass through. The sealing member is used for sealing to prevent leakage, and the connection and assembly of the skirt 272 are convenient.

[0040] In order to detect the negative pressure value of the air flow, a first sensor is arranged at the air inlet a221, and a second sensor is arranged at the air outlet a222. The control device is used to detect the negative pressure value of the first sensor, thereby controlling the first motor 25 to drive the first vacuum pump 22 to evacuate. Then, the negative pressure value after the first vacuum pressure suction is detected by the second sensor, thereby controlling the second motor 26 to drive the second vacuum pump 23 to perform the evacuation operation. This method can achieve dynamic control and distribution.

[0041] The muffler 3 of the present invention includes a device housing 31, and also includes a muffling inner housing 32 disposed inside the device housing 31. A concrete layer 321 is filled between the muffling inner housing 32 and the device housing 31. The thickness of the concrete layer 321 is generally set to about 5-10 cm. The muffling inner housing 32 is provided with a primary muffling cavity 33 and a secondary muffling cavity 34 communicating with the primary muffling cavity 33. The primary muffling cavity 33 is provided with a noise reflection device 35. The gas-liquid noise is transmitted from the primary muffling cavity 33 to the secondary muffling cavity 34. The secondary muffling cavity 34 is provided with a first water filter pipe 341. The bottom of the device housing 31 is provided with an air inlet pipe 311 and a drain pipe 312 communicating with the primary muffling cavity 33. During operation, the air inlet pipe 311 introduces the air flow into the primary muffling cavity 33, and the noise reflection device 35 performs a primary reflection on the air flow, thereby forming multiple rotations. Then, it enters the secondary muffling cavity 34 for sound attenuation using the sound filter cylinder 36. In the secondary muffling cavity 34, the moisture in part of the air flow accumulates and is discharged into the primary muffling cavity 33 through the first water filter pipe 341.

[0042] The inventor of the present invention conducted tests on the above improved technical solution: By testing two mufflers, one with ordinary sound-absorbing cotton and the other with the concrete layer 321, the following noise data was measured at the air flow outlet of the muffler under different operating powers:

[0043]

[0044] Obviously, from the test comparison of the two mufflers using sound-absorbing cotton and concrete above, it can be found that the noise of the muffler using concrete is reduced by about 10%. At the same time, the present muffler uses the concrete layer 321 to replace the traditional sound-absorbing cotton filling, which can not only save the manufacturing cost, but also increase the weight of the muffler, thereby reducing the vibration noise of the equipment. This concrete layer 321 also has the sound-absorbing effect of sound-absorbing cotton.

[0045] For the water collection improvement scheme of the muffler, a water guide pipe is connected to the primary muffling cavity 33. The water guide pipe is connected to a water container 7. The water container 7 is provided with a floating ball automatic valve (the floating ball automatic valve is a prior art). When the water level rises to a specified height, the floating ball automatic valve will automatically open to discharge the excess water, thereby avoiding the influence on the sound attenuation effect due to too much water accumulating in the primary muffling cavity 33.

[0046] Specifically, the noise reflection device 35 includes a first reflection tile 351 and a second reflection tile 352. The concave surface of the first reflection tile 351 faces the intake pipe 311, and air gaps are reserved on both sides. The second reflection tile 352 is symmetrically arranged with the first reflection tile 351. The airflow enters the first-stage silencing cavity 33 and forms a reflection with the first reflection tile 351, and then forms a reflection with the second reflection tile 352 through the air gaps reserved on both sides. Both the first reflection tile 351 and the second reflection tile 352 are provided with notches 353. With the function of the notches 353, the main airflow can pass through the notches to the second reflection tile 352, rather than all passing through the air gaps on both sides, which can balance and reduce noise.

[0047] Certainly, as a preference, in this embodiment, there are two first reflection tiles 351 and two second reflection tiles 352 respectively.

[0048] As a better improvement scheme, a third-stage silencing cavity 37 is further provided. A conversion cavity a381 for transferring the noise of the first-stage silencing cavity 33 to the second-stage silencing cavity 34 is arranged between the second-stage silencing cavity 34 and the third-stage silencing cavity 37. A conversion cavity b382 for transferring the noise of the second-stage silencing cavity 34 to the third-stage silencing cavity 37 is arranged between the first-stage silencing cavity 33 and the second-stage silencing cavity 34. The air guide pipe 313 communicates with the third-stage silencing cavity 37. A sound filtering cylinder 36 and a second water filter pipe 314 passing through the conversion cavity a381, the second-stage silencing cavity 34, the conversion cavity b382 to the first-stage silencing cavity 33 in sequence are arranged in the third-stage silencing cavity 37. The third-stage silencing cavity 37 not only increases the suppression of noise, but also makes the sound absorption stroke of the whole flow longer through the conversion cavity a381 and the conversion cavity b382, thereby improving the sound absorption effect.

[0049] In this technical solution, the air guide pipe 313 is connected with a final-stage silencer 39. The final-stage silencer 39 includes a silencing outer shell 391. The silencing outer shell 391 is provided with an exhaust port 392, and a first silencing plate 393 and a second silencing plate 394 are arranged in the silencing outer shell 391. The final-stage silencer 39 can assist in silencing the final-stage airflow to achieve the purpose of comprehensively reducing noise.

[0050] The oil-water cooling system 5 of the present invention includes a radiator 51 and also includes a fan 52 for accelerating the air flow of the radiator 51. The radiator 51 is provided with at least a first cooling chamber 511 and a second cooling chamber 512. The first cooling chamber 511 is respectively connected with a first cooling water pipe 53 and a second cooling water pipe 54. The first cooling water pipe is connected to a water container to achieve automatic adsorption without a pumping mechanism. The second cooling chamber 512 is connected with an oil path conveying device 55. When the system is working, under the negative pressure adsorption of a vacuum device, since the second cooling water pipe is connected to a first pipe, the water in the second cooling water pipe 54 is automatically adsorbed, so that a negative pressure adsorption is formed in the second cooling water pipe 54 and the first cooling water pipe 53, and further the purpose of automatically cooling the water through the first cooling chamber 511 by the radiator 51 is achieved. The cooled water together with the adsorbed air flow enters the compression vacuum pump (Roots vacuum pump) of the vacuum device to form a water seal auxiliary compression. When the vacuum pump is working, the internal lubricating oil path needs to be cooled. Therefore, the lubricating oil is conveyed to the radiator 51 by the oil path conveying device 55 for cooling, and further the purpose of cooling the lubricating oil at the same time is achieved, avoiding the overheating phenomenon of the vacuum pump. This cooling system can simultaneously cool water and oil through a radiator 51, and combined with the active acceleration of the air flow by the fan 52, the heat dissipation efficiency is improved.

[0051] Specifically, the oil path conveying device 55 includes a first cooling oil pipe 551 and a second cooling oil pipe 552. The first cooling oil pipe 551 is connected with an oil pump 553. The oil pump 553 pumps the oil in the vacuum pump into the first cooling oil pipe 551, and the first cooling oil pipe 551 sends the oil to the radiator 51 for cooling and then sends it back to the vacuum pump through the second cooling pipe.

[0052] In order to improve the quality of the lubricating oil, the second cooling oil pipe 552 is connected with a filter 554. The filter 554 can filter the oil product, and after a certain period of time, the filter 554 can also be cleaned.

[0053] In this technical solution, the radiator 51 includes an outer frame. A first heat sink group 561 and a first heat sink pipe 563 passing through the first heat sink group 561 are arranged in the first cooling chamber 511. A second heat sink group 562 and a second heat sink pipe 564 passing through the second heat sink group 562 are arranged in the second chamber. The first heat sink pipe 563 exchanges heat with the water to the first heat sink group 561, and under the rapid driving of the air flow by the fan 52, the water is dissipated. Similarly, the second heat sink pipe 564 exchanges heat with the second heat sink, and under the rapid driving of the air flow by the fan 52, the oil product is dissipated.

[0054] In this technical solution, the first heat sink group 561 and the second heat sink group are both composed of a plurality of metal heat sinks arranged in parallel, and an air flow gap is left between every two metal heat sinks. These air flow gaps can ensure that the air blower 52 blows out air flow, enabling the air to quickly carry away the heat.

[0055] Meanwhile, a dust-proof net 57 is arranged at the air outlet of the radiator 51 for dust prevention, and the air blower 52 is arranged at the air inlet end of the radiator 51.

[0056] The present invention also provides a drive control method for a vacuum compression device, which is characterized by including the following control steps:

[0057] S1. The control device obtains the air flow pressure value N1 before the first-stage compression through the first sensor;

[0058] S2. The control device automatically distributes the preset first-stage air flow negative pressure value M1 and the second-stage air flow negative pressure value M2 according to the air flow pressure value N1; wherein, both M1 and M2 are range values.

[0059] S3. The control device adjusts the rotation speed S1 of the first-stage compression motor according to the first-stage air flow negative pressure value M1, and adjusts the rotation speed S2 of the second-stage compression motor according to the second-stage air flow negative pressure value M2;

[0060] S4. The control device obtains the air flow pressure value N2 after the first-stage compression through the second sensor;

[0061] S5. When the value of N2 exceeds the negative pressure value range of M1, the control device corrects the rotation speed S2 of the second-stage compression motor.

[0062] By adopting the drive control method of the present invention, the drive speeds of the two motors can be more reasonably distributed, enabling the two vacuum pumps to maintain a better compression balance, thereby improving the working efficiency.

[0063] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, based on the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A dual-drive vacuum compression device, comprising a main body housing, characterized in that: A double-drive vacuum pump device and an oil-water cooling system are arranged inside the main housing. A storage tank is arranged on one side of the main housing. The storage tank is connected to the double-drive vacuum pump device through a first pipeline. A muffler is arranged on the other side of the main housing. The double-drive vacuum pump device is connected to the muffler through a second pipeline; The muffler includes a device housing and a sound-absorbing inner housing arranged inside the device housing. A concrete layer is filled between the sound-absorbing inner housing and the device housing. The sound-absorbing inner housing is provided with a primary sound-absorbing cavity and a secondary sound-absorbing cavity communicated with the primary sound-absorbing cavity. A noise reflection device is arranged in the primary sound-absorbing cavity. The gas-liquid noise is transmitted from the primary sound-absorbing cavity to the secondary sound-absorbing cavity. The secondary sound-absorbing cavity is provided with a first water filter pipe; An air inlet pipe and a drain pipe communicated with the primary sound-absorbing cavity are arranged at the bottom of the device housing; A tertiary sound-absorbing cavity is also arranged. A conversion cavity a for transferring the noise in the primary sound-absorbing cavity to the secondary sound-absorbing cavity is arranged between the secondary sound-absorbing cavity and the tertiary sound-absorbing cavity. A conversion cavity b for converting the noise in the secondary sound-absorbing cavity to the tertiary sound-absorbing cavity is arranged between the primary sound-absorbing cavity and the secondary sound-absorbing cavity. An air guide pipe is communicated with the tertiary sound-absorbing cavity. A sound filter cylinder and a second water filter pipe passing through the conversion cavity a, the secondary sound-absorbing cavity, the conversion cavity b to the primary sound-absorbing cavity in sequence are arranged in the tertiary sound-absorbing cavity; The noise reflection device includes a first reflection tile and a second reflection tile. The concave surface of the first reflection tile faces the air inlet pipe and air gaps are reserved on both sides. The second reflection tile is symmetrically arranged with the first reflection tile. Both the first reflection tile and the second reflection tile are provided with notches; A control device is also included. The double-drive vacuum pump device is electrically connected to the control device. The control device includes a display control screen.

2. The double-drive vacuum compression device according to claim 1, wherein: The double-drive vacuum pump device includes a first base. A first vacuum pump and a second vacuum pump are arranged on the first base in sequence. The first vacuum pump is provided with an air inlet a and an air outlet a. The second vacuum pump is provided with an air inlet b and an air outlet b. The air outlet a is communicated with the air inlet b; A second base is arranged above the first vacuum pump and the second vacuum pump. The second base is provided with a first motor for driving the first vacuum pump and a second motor for driving the second vacuum pump; The control device controls the first motor and the second motor.

3. A dual-drive vacuum compression device according to claim 2, characterized in that: The air outlet a is arranged on the upper surface of the first vacuum pump, and the air inlet b is arranged on the upper surface of the second vacuum pump.

4. The double-drive vacuum compression device according to claim 3, wherein: The second base is provided with air holes corresponding to the air outlet a and the air inlet b one by one. An air hood is also included. The air hood is connected to the second base and forms an air flow communication channel for the two air holes.

5. A dual-drive vacuum compression device according to claim 2, characterized in that: A first sensor is arranged on the first pipeline, and a second sensor is arranged on the air outlet a.

6. A dual-drive vacuum compression device according to claim 1, characterized in that: The air guide pipe is connected with a final-stage muffler.

7. A dual-drive vacuum compression device according to claim 1, characterized in that: The oil-water cooling system includes a radiator and a fan for accelerating the air flow of the radiator. The radiator is at least provided with a first cooling chamber and a second cooling chamber. The first cooling chamber is respectively connected with a first cooling water pipe and a second cooling water pipe; The second cooling chamber is connected with an oil pipeline conveying device.

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