A kind of water ring vacuum pump performance detection equipment

Abstract

The present application relates to the technical field of vacuum pump testing, and particularly relates to a delivery performance detection device for a water ring vacuum pump. The device comprises a detection pool, wherein the detection pool is provided with an electric sliding rail, the electric sliding rail is slidably connected with an electric sliding block, the electric sliding block of the electric sliding rail is provided with a sliding frame, the sliding frame is fixedly connected with a supporting frame and a compressor, the supporting frame is rotatably connected with symmetrical and uniformly distributed limiting wheels, the detection pool is provided with a rotating motor, and the output shaft of the rotating motor is provided with an inner sleeve located in the detection pool. The inner sleeve is connected with the output shaft of the pump to be detected, so that the impeller of the pump to be detected rotates through the inner sleeve, the internal rotor rotation simulates the state of the pump body under real working conditions, the leakage points that appear during operation are exposed, the detection result is closer to the use scene, and the detection effect of the water ring vacuum pump is significantly improved to ensure the qualified rate of finished products.

Description

Technical Field

[0001] This invention relates to the field of vacuum pump testing technology, and in particular to a factory performance testing device for a water ring vacuum pump. Background Technology

[0002] The bubble observation method is one of the most intuitive and reliable leak detection methods currently available. It is widely used in the current water ring vacuum pump tightness testing. The principle is to first inject gas at a certain pressure into the pump body, and then immerse the pump body in the test pool. After that, the operator observes the water surface. If there is a leak, the gas will overflow and form bubbles on the water surface. Then the leaking water ring vacuum pump is marked.

[0003] Since traditional bubble detection methods are performed under static conditions, there is a significant difference between the detection state of the existing bubble observation method and the actual operating conditions of the pump. When the water ring vacuum pump is running, its impeller rotates at high speed. If there is leakage at the sealing connection or iron crack of the pump body itself, these leakage points will only be exposed when the pump is in motion. This means that some pump bodies may still leak when running even if they pass the static test, which affects the final pass rate of the pump body. Summary of the Invention

[0004] This invention provides a factory performance testing device for a water ring vacuum pump to overcome the shortcomings mentioned in the background.

[0005] The technical solution of the present invention is as follows: a factory performance testing device for a water ring vacuum pump, comprising a testing tank, an electric slide rail installed in the testing tank, an electric slider slidably connected to the electric slide rail, a sliding frame installed on the electric slider of the electric slide rail, a support frame and a compressor fixedly connected to the sliding frame, the compressor being used to provide compressed air to the pump, symmetrically and evenly distributed limiting wheels being rotatably connected to the support frame, the limiting wheels being used to limit the pump body, a rotating motor installed in the testing tank, an inner sleeve located within the testing tank being provided on the output shaft of the rotating motor, and a docking assembly being provided within the testing tank, the docking assembly being used to transmit the power of the rotating motor to the inner sleeve.

[0006] Furthermore, the docking assembly includes an outer sleeve, which is rotatably connected to the detection pool. The outer sleeve is fixedly connected to the output shaft of the rotating motor. The outer sleeve is slidably and rotatably connected to the inner sleeve. An electric push rod is fixedly connected inside the detection pool. A fixing frame is fixedly connected to the output shaft of the electric push rod. The fixing frame is rotatably connected to the inner sleeve and is used to drive the inner sleeve to move. A first circumferentially distributed limiting block is fixedly connected to the inner sleeve, and a second circumferentially distributed limiting block is fixedly connected to the outer sleeve. The second circumferentially distributed limiting block and the first circumferentially distributed limiting block are used together to rotate the inner sleeve.

[0007] Furthermore, both the first limiting block and the second limiting block have an inclined surface and a straight surface, and the straight surface of the first limiting block is used to press against the straight surface of the corresponding second limiting block.

[0008] Furthermore, the inner sleeve is provided with a guide surface for guiding when it is connected to the output shaft of the pump.

[0009] Furthermore, symmetrically distributed fixing plates are fixedly connected inside the detection pool, and each of the symmetrically distributed fixing plates is rotatably connected to a symmetrically distributed clamping plate. A first elastic element is provided between each fixing plate and the adjacent clamping plate, and the clamping plate is used to fix the pump body.

[0010] Furthermore, the clamping plate has an arc-shaped cross-section.

[0011] Furthermore, it also includes a gearbox, which is fixedly connected inside the detection pool. The input shaft of the gearbox is driven by a pulley and belt to the outer sleeve. A drive shaft and a driven shaft are rotatably connected inside the detection pool. A transmission assembly is provided on the output shaft of the gearbox. The transmission assembly is used to drive the drive shaft to rotate. The drive shaft and the driven shaft are driven by a pulley and belt. Both the drive shaft and the driven shaft are rotatably connected to evenly distributed transmission wheels. Each transmission wheel corresponds to a limit wheel and is used to drive the corresponding limit wheel to rotate.

[0012] Furthermore, the transmission assembly includes mirror-distributed full-tooth bevel gears, all of which are fixedly connected to the drive shaft. The output shaft of the gearbox is fixedly connected to a missing-tooth bevel gear, and the missing-tooth bevel gear and the mirror-distributed full-tooth bevel gears are all connected in a transmission manner.

[0013] Furthermore, each of the adjacent clamping plates on different fixed plates is provided with uniformly distributed extrusion rollers, which are used to reduce the friction between the pump body and the clamping plates when the pump body rotates.

[0014] Furthermore, each of the opposite sides of the adjacent clamping plates on different fixed plates is slidably connected to a uniformly distributed sliding base, the extrusion roller corresponds to the sliding base, the sliding base is rotatably connected to the corresponding extrusion roller, and a second elastic element is provided between the sliding base and the adjacent clamping plate.

[0015] The present invention has the following advantages: The present invention connects the inner sleeve to the output shaft of the pump under test, so that the impeller of the pump under test rotates through the inner sleeve. The rotation of the internal rotor simulates the state of the pump body under real working conditions, so that leakage points that only appear during operation can be exposed, and the test results can be closer to the usage scenario, which significantly improves the test effect of water ring vacuum pumps and ensures the finished product qualification rate.

[0016] This invention uses the cooperation of a transmission wheel and a limiting wheel to make the pump body rotate. At the same time, the combination of a full-tooth bevel gear and a missing-tooth bevel gear makes the pump body reciprocate, exposing the leakage point located at the bottom of the pump body. This makes it easier for inspectors to observe, ensuring the accuracy of leakage point location and greatly improving the accuracy of leakage point determination.

[0017] This invention uses multiple squeezing rollers on a clamping plate to clamp the pump body. All the squeezing rollers are in closer contact with the surface of the pump body under the action of adjacent sliding bases, realizing the contact between the squeezing rollers and the pump body. This allows the device to adapt to different pump body models and also improves the stability of the pump body during rotation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a three-dimensional structural diagram of the sliding frame and limiting wheel of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the electric push rod and fixing frame of the present invention;

[0021] Figure 4 This is a three-dimensional structural cross-sectional view of the inner sleeve and outer sleeve of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the drive shaft, transmission wheel, and full-tooth bevel gear of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of the clamping plate and extrusion roller of the present invention;

[0024] Figure 7 This is a three-dimensional structural diagram of the extrusion roller and sliding base of the present invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Detection pool; 2. Electric slide rail; 3. Sliding frame; 4. Support frame; 5. Compressor; 6. Limiting wheel; 7. Rotating motor; 8. Inner sleeve; 201. Outer sleeve; 202. Electric push rod; 203. Fixing frame; 204. First limiting block; 205. Second limiting block; 301. Fixing plate; 302. Clamping plate; 401. Gearbox; 402. Drive shaft; 403. Driven shaft; 404. Transmission wheel; 501. Full-tooth bevel gear; 502. Missing-tooth bevel gear; 601. Extrusion roller; 701. Sliding base. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Because the detection conditions of the existing bubble observation method are significantly different from the actual operating conditions of the pump, if there is leakage at the sealing connection or iron crack of the pump body during the operation of the water ring vacuum pump, these leakage points will only be exposed when the pump is in motion. This results in some pump bodies leaking even when they pass the static test, affecting the final pass rate of the pump body.

[0028] Example 1

[0029] A device for testing the factory performance of a water ring vacuum pump, such as... Figures 1-4 As shown, the system includes a detection pool 1, on which two electric slide rails 2 are installed. Each electric slide rail 2 is slidably connected to an electric slider. The electric sliders of the two electric slide rails 2 are jointly mounted on a sliding frame 3. The sliding frame 3 is fixedly connected to the electric sliders on the electric slide rails 2. The sliding frame 3 is fixedly connected to a support frame 4 and a compressor 5. The compressor 5 is used to provide compressed air to the pump. Four symmetrically and evenly distributed limit wheels 6 are rotatably connected to the support frame 4. When the pump body is placed on the limit wheels 6, the four limit wheels 6 jointly guide the pump body towards the center and limit the pump body. A rotary motor 7 is installed on the right side of the detection pool 1. The output shaft of the rotary motor 7 is provided with an inner sleeve 8 located inside the detection pool 1. A docking assembly is provided inside the detection pool 1. The docking assembly is used to transmit the power of the rotary motor 7 to the inner sleeve 8.

[0030] like Figures 2-5As shown, the docking assembly includes an outer sleeve 201, which is rotatably connected to the detection pool 1. The outer sleeve 201 is fixedly connected to the output shaft of the rotating motor 7. The outer sleeve 201 is slidably and rotatably connected to the inner sleeve 8. An electric push rod 202 is fixedly connected to the right side of the detection pool 1. A fixing frame 203 is fixedly connected to the output shaft of the electric push rod 202. The fixing frame 203 consists of a connecting plate and a ring plate. The ring plate of the fixing frame 203 is rotatably connected to the inner sleeve 8. The fixing frame 203 is used to drive the inner sleeve 8 to move. The inner sleeve 8 is a replaceable part and can be replaced according to the keyway size of different batches of pumps. A guide surface is provided in the cavity of the inner sleeve 8 for guiding when it contacts the keyway of the pump's output shaft. Several circumferentially distributed first limiting blocks 204 are fixedly connected to the inner sleeve 8. The outer sleeve 201 is fixed with a plurality of circumferentially distributed second limiting blocks 205, and the number of first limiting blocks 204 is the same as the number of second limiting blocks 205. The circumferentially distributed second limiting blocks 205 and the circumferentially distributed first limiting blocks 204 cooperate to drive the inner sleeve 8 to rotate. When the outer sleeve 201 rotates, the inner sleeve 8 drives all the first limiting blocks 204 to press the corresponding second limiting blocks 205, thereby enabling the second limiting blocks 205 to drive the first limiting blocks 204 to rotate. Both the first limiting blocks 204 and the second limiting blocks 205 have inclined surfaces and straight surfaces. The cross-sections of the first limiting blocks 204 and the second limiting blocks 205 are both right-angled trapezoids, and the straight surface of the first limiting block 204 is used to press the straight surface of the corresponding second limiting block 205.

[0031] like Figure 2 and Figures 5-7 As shown, two symmetrically distributed fixed plates 301 are fixedly connected in the detection pool 1. Each symmetrically distributed fixed plate 301 is rotatably connected to a symmetrically distributed clamping plate 302. The clamping plate 302 is located on the moving path of the pump body. The cross section of the clamping plate 302 is arc-shaped. Two adjacent clamping plates 302 on different fixed plates 301 are used to clamp the two sides of the pump body together. A first elastic element is provided between the fixed plate 301 and the adjacent clamping plate 302. The first elastic element is a torsion spring.

[0032] The working principle of this embodiment is as follows:

[0033] When using this device to test the airtightness of a water ring vacuum pump, first place the water ring vacuum pump to be tested on the support 4. During this process, the water ring vacuum pump first contacts the limiting wheels 6. The limiting wheels 6 in contact with the water ring vacuum pump guide the pump body until the pump body is in complete contact with all four limiting wheels 6. At this time, the state of the limiting wheels 6 and the water ring vacuum pump is as follows: Figure 1 As shown, the water ring vacuum pump is in place. Then, the air pipe of compressor 5 is connected to the interface of the pump body, and a specific amount (specifically referring to the pressure value required for detection, but not limited here) of compressed air is injected into the cavity of the water ring vacuum pump.

[0034] After the water ring vacuum pump is placed, the two electric slide rails 2 are activated. The sliding frame 3 moves downward under the drive of the electric sliders on the two electric slide rails 2. The sliding frame 3 drives the support frame 4, compressor 5 and limit wheel 6 to move together. During the downward movement, the pump body contacts all the clamping plates 302. Two adjacent clamping plates 302 on different fixed plates 301 begin to swing in opposite directions under the action of the pump body's gravity until the rotation axis of the output shaft of the water ring vacuum pump coincides with the rotation axis of the inner sleeve 8. At this time, the first elastic element torsional storage force is achieved, and the state of the clamping plate 302 at this time is as follows. Figure 7 As shown, the pump body is completely clamped by all the clamping plates 302, and the electric slide rail 2 is closed.

[0035] After the water ring vacuum pump is clamped, the electric push rod 202 and the rotary motor 7 are started. The output shaft of the rotary motor 7 drives the outer sleeve 201 to rotate, and the outer sleeve 201 drives all the second limit blocks 205 to rotate. The telescopic end of the electric push rod 202 drives the fixed frame 203 to move to the left, and the fixed frame 203 drives the inner sleeve 8 to move together. At this time, the outer sleeve 201 and the inner sleeve 8 slide relative to each other, and the inner sleeve 8 drives the first limit block 204 to move together. The inner sleeve 8 contacts the output shaft of the water ring vacuum pump until the inner sleeve 8 contacts the keyway of the output shaft of the water ring vacuum pump. After the keyway presses against the inner sleeve 8, the guide on the inner sleeve 8... The inner sleeve 8 rotates under the pressure of the pressure. At this time, the fixed frame 203 rotates relative to the inner sleeve 8. Then, the second limiting block 205 engages with the first limiting block 204. All the second limiting blocks 205 drive the inner sleeve 8 to rotate through the first limiting block 204. At this time, the inner sleeve 8 rotates relative to the fixed frame 203. The inner sleeve 8 connects with the output shaft of the pump under test, so that the impeller of the pump under test rotates through the inner sleeve 8. The rotation of the internal rotor simulates the state of the pump body under real working conditions. The leakage points that occur during operation are exposed, so that the test results are closer to the usage scenario, which significantly improves the quality level of the water ring vacuum pump.

[0036] After the inner sleeve 8 is connected to the output shaft of the water ring vacuum pump, the operator observes whether bubbles are generated on the water surface and records them. Then, after the rotor of the water ring vacuum pump rotates for a period of time under the action of the inner sleeve 8 (this period is the total testing time and is not strictly limited), the water ring vacuum pump test is completed. The rotating motor 7 is turned off, and the outer sleeve 201 and inner sleeve 8 stop rotating. Then, the electric push rod 202 is activated. The telescopic end of the electric push rod 202 drives the fixed frame 203 to move to the right, and the first limit block 204 loses contact with the second limit block 205. Subsequently, the inner sleeve 8 loses contact with the output shaft of the water ring vacuum pump, and the inner sleeve 8 completely moves out of the output shaft of the water ring vacuum pump until the outer sleeve 201 and inner sleeve 8 reach the desired position. Figure 4 After reaching the indicated state, the telescopic end of the electric push rod 202 stops moving.

[0037] After the outer sleeve 201 and inner sleeve 8 are reset, the two electric slide rails 2 are activated. The sliding frame 3 moves upward under the drive of the electric sliders of the two electric slide rails 2. The support frame 4 drives the water ring vacuum pump to move together through all the limit wheels 6. The water ring vacuum pump gradually loses its pressure on all the clamping plates 302, and all the clamping plates 302 lose their clamping on the water ring vacuum pump. Two adjacent clamping plates 302 on different fixed plates 301 begin to swing back to back under the action of the corresponding first elastic elements, until the water ring vacuum pump loses contact with all the clamping plates 302. As the support frame 4 continues to move upward, until the support frame 4 and the limit wheels 6 reach the desired position... Figure 1 After the indicated state is reached, turn off the electric slide rail 2. Then, the operator removes the air pipe of the compressor 5 from the interface of the pump body. After that, remove the water ring vacuum pump that has been tested. Until the next time this device is used to check the water ring vacuum pump, place the water ring vacuum pump on the support frame 4, and then repeat the above steps.

[0038] Example 2

[0039] Based on Example 1, such as Figure 2 and Figure 5 As shown, it also includes a gearbox 401, which is fixedly connected inside the detection pool 1. The gearbox 401 is a reduction gearbox. The right side of the gearbox 401 is the input shaft, and the left front part is the output shaft. The input shaft of the gearbox 401 is connected to the outer sleeve 201 by a pulley and belt. A drive shaft 402 and a driven shaft 403 are rotatably connected inside the detection pool 1. The axis of the drive shaft 402 and the axis of the driven shaft 403 are at the same height and parallel. A transmission assembly is provided on the output shaft of the gearbox 401, which is used to drive the drive shaft. When shaft 402 rotates, the drive shaft 402 and the driven shaft 403 are driven by a belt and pulley. Both the drive shaft 402 and the driven shaft 403 are rotatably connected to evenly distributed drive wheels 404. Each drive wheel 404 corresponds to a limit wheel 6. The drive wheel 404 and the limit wheel 6 are both made of rubber to increase the friction between the drive wheel 404, the adjacent limit wheel 6, and all the limit wheels 6 and the pump body. The drive wheel 404 is located on the movement path of the corresponding limit wheel 6 and is used to drive the corresponding limit wheel 6 to rotate.

[0040] like Figure 2 and Figures 5-7 As shown, the transmission assembly includes mirror-distributed full-tooth bevel gears 501, all of which are fixedly connected to the drive shaft 402. The output shaft of the gearbox 401 is fixedly connected to a missing-tooth bevel gear 502. The missing-tooth bevel gear 502 and the mirror-distributed full-tooth bevel gears 501 are both connected in a transmission manner. The full-tooth bevel gears 501 and the missing-tooth bevel gears 502 cause the pump body to rotate back and forth, which facilitates observation by inspection personnel and improves the location and judgment of leakage points.

[0041] like Figures 5-7 As shown, five evenly distributed extrusion rollers 601 are provided on the opposite sides of adjacent clamping plates 302 on different fixed plates 301. The surface of the extrusion rollers 601 is made of rubber. The extrusion rollers 601 are used to reduce the friction between the pump body and the clamping plate 302 when the pump body rotates. The extrusion rollers 601 are used to rotate relative to the pump body when it rotates.

[0042] like Figure 6 and Figure 7 As shown, five evenly distributed sliding bases 701 are slidably connected to the opposing sides of adjacent clamping plates 302 on different fixed plates 301. The extrusion rollers 601 correspond one-to-one with the sliding bases 701, and the sliding bases 701 are rotatably connected to the corresponding extrusion rollers 601. A second elastic element is provided between the sliding bases 701 and the adjacent clamping plates 302. The second elastic element is a spring. The second elastic element is used to extrude the adjacent sliding bases 701, so that the extrusion rollers 601 contact the surface of the pump body.

[0043] The working principle of this embodiment is as follows:

[0044] After the clamping plate 302 clamps the water ring vacuum pump, the four transmission wheels 404 contact the adjacent limiting wheels 6 respectively. After the inner sleeve 8 connects with the output shaft of the water ring vacuum pump, when the outer sleeve 201 rotates, the outer sleeve 201 drives the input shaft of the gearbox 401 to rotate via a belt. The output shaft of the gearbox 401 drives the missing tooth bevel gear 502 to rotate. The missing tooth bevel gear 502 drives the right full tooth bevel gear 501 to rotate. The right full tooth bevel gear 501 drives the drive shaft 402 to rotate. The drive shaft 402 drives the left full tooth bevel gear 501 to rotate. The drive shaft 402 drives the driven shaft 403 to rotate together via a belt. The drive shaft 402 and the driven shaft 403 respectively drive the transmission wheels 404 on them to rotate. The transmission wheel 404 drives the adjacent limit wheel 6 to rotate. All the limit wheels 6 together drive the water ring vacuum pump on them to rotate. As the missing tooth bevel gear 502 rotates, the missing tooth bevel gear 502 loses transmission with the right full tooth bevel gear 501. At the same time, the missing tooth bevel gear 502 transmits transmission with the left full tooth bevel gear 501. The missing tooth bevel gear 502 drives the left full tooth bevel gear 501 to rotate in the opposite direction. At this time, the left full tooth bevel gear 501 drives all the parts on it to move and rotate. The pump body reciprocates through the two full tooth bevel gears 501 and the missing tooth bevel gear, which makes it convenient for the inspection personnel to observe and ensures the accuracy of the leak point location. At the same time, it also greatly improves the accuracy of the leak point determination.

[0045] During the clamping process of the water ring vacuum pump, adjacent clamping plates 302 on different fixed plates 301 begin to swing in opposite directions. Each clamping plate 302 drives its five sliding bases 701 to move together. The sliding bases 701 then drive adjacent extrusion rollers 601 to move together until the extrusion rollers 601 contact the pump body. Under the extrusion action of the pump body, the extrusion rollers 601 cause the sliding bases 701 to slide along adjacent clamping plates 302. The second elastic element is compressed and stores force until the water ring vacuum pump is completely clamped. All extrusion rollers 601 are in contact with the pump body and clamp it. When the limiting wheel 6 drives the water ring vacuum pump on it to rotate, all the extrusion rollers 601 are driven to rotate together by the pump body. When they encounter protrusions such as fins on the pump, the extrusion rollers 601 are squeezed by the pump and push the sliding base 701 to move. The sliding base 701 squeezes the corresponding second elastic element. After the protrusions such as fins separate from the extrusion rollers 601, the extrusion rollers 601 still stick tightly to the pump body under the action of the sliding base 701 and the elastic element. The extrusion rollers 601 and the pump body are always in contact, which makes the device adaptable to different types of pump bodies and also improves the stability of the pump body during rotation.

[0046] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A factory performance testing device for a water ring vacuum pump, comprising a testing tank (1), wherein an electric slide rail (2) is installed in the testing tank (1), an electric slider is slidably connected to the electric slide rail (2), a sliding frame (3) is installed on the electric slider of the electric slide rail (2), a support frame (4) and a compressor (5) are fixedly connected to the sliding frame (3), and the compressor (5) is used to provide compressed air to the pump, characterized in that: The support frame (4) is rotatably connected with symmetrical and evenly distributed limiting wheels (6), which are used to limit the pump body. The detection pool (1) is equipped with a rotating motor (7), and the output shaft of the rotating motor (7) is provided with an inner sleeve (8) located in the detection pool (1). The detection pool (1) is provided with a docking assembly, which is used to transmit the power of the rotating motor (7) to the inner sleeve (8). The docking assembly includes an outer sleeve (201), which is rotatably connected to the detection pool (1). The outer sleeve (201) is fixedly connected to the output shaft of the rotating motor (7). The outer sleeve (201) is slidably and rotatably connected to the inner sleeve (8). An electric push rod (202) is fixedly connected inside the detection pool (1). A fixing frame (203) is fixedly connected to the output shaft of the electric push rod (202). The fixing frame (203) is rotatably connected to the inner sleeve (8). The fixing frame (203) is used to drive the inner sleeve (8) to move. A first limiting block (204) is fixedly connected to the inner sleeve (8). A second limiting block (205) is fixedly connected to the outer sleeve (201). The second limiting block (205) and the first limiting block (204) are used together to make the inner sleeve (8) rotate. Both the first limiting block (204) and the second limiting block (205) have inclined surfaces and flat surfaces, and the flat surface of the first limiting block (204) is used to press against the flat surface of the corresponding second limiting block (205).

2. The factory performance testing equipment for a water ring vacuum pump according to claim 1, characterized in that: The inner sleeve (8) is provided with a guide surface for guiding when it is connected to the output shaft of the pump.

3. The factory performance testing equipment for a water ring vacuum pump according to claim 1, characterized in that: The detection pool (1) is fixed with symmetrically distributed fixing plates (301), and each of the symmetrically distributed fixing plates (301) is rotatably connected with a symmetrically distributed clamping plate (302). A first elastic element is provided between each fixing plate (301) and the adjacent clamping plate (302), and the clamping plate (302) is used to fix the pump body.

4. The factory performance testing equipment for a water ring vacuum pump according to claim 3, characterized in that: The clamping plate (302) has an arc-shaped cross section.

5. The factory performance testing equipment for a water ring vacuum pump according to claim 3, characterized in that: It also includes a gearbox (401), which is fixedly connected to the detection pool (1). The input shaft of the gearbox (401) is driven by a pulley belt to the outer sleeve (201). The detection pool (1) is rotatably connected to a drive shaft (402) and a driven shaft (403). The output shaft of the gearbox (401) is provided with a transmission assembly, which is used to drive the drive shaft (402) to rotate. The drive shaft (402) and the driven shaft (403) are driven by a pulley belt. The drive shaft (402) and the driven shaft (403) are rotatably connected to evenly distributed transmission wheels (404). The transmission wheels (404) correspond one-to-one with the limit wheels (6). The transmission wheels (404) are used to drive the corresponding limit wheels (6) to rotate.

6. The factory performance testing equipment for a water ring vacuum pump according to claim 5, characterized in that: The transmission assembly includes a mirror-distributed full-tooth bevel gear (501), all of which are fixed to the drive shaft (402). The output shaft of the gearbox (401) is fixed to a missing-tooth bevel gear (502), and the missing-tooth bevel gear (502) and the mirror-distributed full-tooth bevel gear (501) are both connected in a transmission manner.

7. The factory performance testing equipment for a water ring vacuum pump according to claim 4, characterized in that: On the opposite sides of the clamping plates (302) adjacent to the fixed plates (301), there are uniformly distributed extrusion rollers (601). The extrusion rollers (601) are used to reduce the friction between the pump body and the clamping plates (302) when the pump body rotates.

8. The factory performance testing equipment for a water ring vacuum pump according to claim 7, characterized in that: Each of the fixed plates (301) and the adjacent clamping plates (302) is slidably connected to a uniformly distributed sliding base (701). The extrusion roller (601) corresponds one-to-one with the sliding base (701). The sliding base (701) is rotatably connected to the corresponding extrusion roller (601). A second elastic element is provided between the sliding base (701) and the adjacent clamping plate (302).

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