A water pump hydrostatic pressure sealing test bench

Abstract

The present invention relates to the technical field of pump testing equipment, specifically a water pump hydrostatic pressure sealing test bench, which includes a main body mechanism. The main body mechanism includes a pedestal, and a limiting mechanism is arranged on the pedestal. The limiting mechanism includes an air pump, the air pump is fixedly connected through a conduit and a connector, and a pressing mechanism is arranged inside the connector. In the present invention, when the air pump fills the water pump with gas to form pressure, a part of the gas enters the air duct, and then the high-pressure gas pushes the piston disc to drive the push rod to move. When the push rod drives the slider to move, it drives the pressing rod to drive the pressing block to squeeze the water pump water outlet upward, so that the water pump water outlet and the sealing sleeve are further in close contact, preventing gas leakage and affecting the test effect. At the same time, the sealing sleeve and the connector are designed in a frustum shape, which can meet the water pump water outlets of various specifications, and the abutting rod and the pressing block slide along with the slider, and can squeeze the water pump water outlets of various specifications, thereby ensuring the sealing performance.

Description

Technical Field

[0001] The invention relates to the technical field of pump testing equipment, in particular to a water pump water pressure resistance and sealing performance testing platform. Background Art

[0002] As an essential component of modern construction, water pumps' safe operation is directly linked to the proper functioning of the entire building. Therefore, ensuring stable operation under various operating conditions is crucial. A pump's water pressure resistance and sealing performance are crucial for ensuring stable operation. Poor sealing performance can easily lead to water leakage, reduced efficiency, and, in severe cases, even safety accidents.

[0003] The purpose of the water pump water pressure sealing test is to evaluate the sealing performance of the water pump when it is subjected to a certain water pressure, to ensure that the water pump will not leak under normal operating pressure, thereby ensuring the stability and safety of the water pump. In the existing technology, the test of water pumps generally involves blocking the water outlet or water inlet of the water pump, submerging it in water, and then injecting air into one of the ports for a certain period of time to observe whether there is any leakage, thereby measuring the sealing performance. However, because the specifications of the pumps are different, the diameters of the water outlet and water inlet are also different. Therefore, the existing testing equipment needs to replace the connectors of different sizes during measurement in order to test water pumps of various specifications. This process is relatively cumbersome.

[0004] In view of this, the present invention proposes a water pump water pressure resistance and sealing test bench to solve the above technical problems. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] A water pump water pressure resistance and sealing test bench, comprising a main body, the main body comprising a base, the base being provided with a limiting mechanism, the limiting mechanism comprising an air pump, the air pump being fixedly connected to a joint via an air guide tube, the joint being provided with a tightening mechanism;

[0007] Among them, the pressing mechanism includes sliding grooves. There are multiple sliding grooves, and the multiple sliding grooves are evenly arranged on the inner wall of the joint. A slider is slidably connected in the sliding groove. A pressing rod is fixedly connected to the slider. A pressing block is fixedly connected to the end of the pressing rod in contact with the water pump outlet. A push-pull rod is fixedly connected to one side of the slider. The push-pull rod extends towards the direction close to the air duct. An air duct is provided on the side wall of the joint. The push-pull rod extends into the interior of the air duct. A piston disk is fixedly connected to the end of the push-pull rod away from the slider. The piston disk is slidably connected to the air duct. One end of the air duct close to the slider is sealed by a sealing ring. The push-pull rod slidably passes through the sealing ring. An exhaust hole for exhausting air is provided at the end of the air duct away from the slider. An air inlet duct is provided on the side surface of the air duct close to the slider. One end of the air inlet duct away from the air duct extends out of the inner wall of the joint.

[0008] As a preferred solution of the water pump hydrostatic pressure sealing test bench provided by the present invention, the main body mechanism further includes a test pool. The test pool is fixedly connected to the pedestal. A lifting plate is arranged in the test pool. Threaded rods are connected to both sides of the lifting plate. One end of the threaded rod is fixedly connected to a lifting motor. The lifting motor is fixedly connected to the test pool. The lifting plate is slidably connected to the test pool.

[0009] As a preferred solution of the water pump hydrostatic pressure sealing test bench provided by the present invention, a fixed clamping mechanism is arranged in the test pool. The fixed clamping mechanism includes a first cylinder. The first cylinder is fixedly connected to the upper end surface of the lifting plate. The output end of the first cylinder is fixedly connected to a clamping plate. The clamping plate is slidably connected to the upper end surface of the lifting plate. A fixing plate is arranged on one side of the clamping plate. The fixing plate is fixedly connected to the upper end surface of the lifting plate.

[0010] As a preferred solution of the water pump hydrostatic pressure sealing test bench provided by the present invention, a sealing gasket is fixedly connected to the end of the fixing plate close to the clamping plate.

[0011] As a preferred solution of the water pump hydrostatic pressure sealing test bench provided by the present invention, the limiting mechanism further includes a second cylinder. The second cylinder is fixedly connected to the outer wall of the joint. The output end of the second cylinder extends into the interior of the joint. The output end of the second cylinder is fixedly connected to a limiting block.

[0012] As a preferred solution of the water pump hydrostatic pressure sealing test bench provided by the present invention, a sealing sleeve is fixedly connected to the inner wall of the joint.

[0013] As a preferred embodiment of the water pump hydrostatic pressure sealing test bench provided by the present invention, during the test, the outer ring of the water pump outlet is in contact with the sealing sleeve, and a sealed space is formed among the water pump outlet, the sealing sleeve, and the joint. Meanwhile, the pressing block presses the water pump outlet, so that the water pump outlet closely adheres to the sealing sleeve.

[0014] As a preferred embodiment of the water pump hydrostatic pressure sealing test bench provided by the present invention, the position where the air inlet duct extends into the joint is above the sealing sleeve, and the connection position between the air inlet duct and the air duct is always below the piston disc.

[0015] Advantages of the present invention:

[0016] In the present invention, when the air pump fills the water pump with gas through the air duct and the joint, a part of the gas enters the air duct from the air inlet duct. Due to the sealing of the sealing ring, the gas accumulates in the air duct. Subsequently, the high-pressure gas pushes the piston disc to slide in the air duct. When the piston disc slides, it drives the push rod to move. When the push rod moves, it drives the slider to move in the chute. When the slider moves, it drives the pressing rod to drive the pressing block to upwardly press the water pump outlet, so that the water pump outlet and the sealing sleeve are further in close contact, preventing gas leakage and affecting the test effect. At the same time, the sealing sleeve and the joint are designed in a frustum shape, which can meet the water pump outlets of various specifications. Moreover, the pressing rod and the pressing block slide along with the slider, and can press the water pump outlets of various specifications, thereby ensuring the sealing performance. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Among them:

[0019] Figure 1 is a schematic diagram of the overall structure of a water pump hydrostatic pressure sealing test bench;

[0020] Figure 2 is a schematic diagram of the internal connection structure of the test pool in a water pump hydrostatic pressure sealing test bench;

[0021] Figure 3 is a schematic diagram of the connection structure between the fixed clamping mechanism and the main body mechanism in a water pump hydrostatic pressure sealing test bench;

[0022] Figure 4 is Figure 3 an enlarged schematic diagram of the structure at A in

[0023] Figure 5 It is a schematic diagram of the connection structure of the limiting mechanism and the pressing mechanism in a water pump hydrostatic pressure sealing test bench;

[0024] Figure 6 is Figure 5 an enlarged schematic diagram of the structure at position B in

[0025] In the figure:

[0026] 1. Main body mechanism; 11. Pedestal; 12. Test pool; 13. Lifting plate; 14. Lifting motor; 15. Lead screw;

[0027] 2. Fixed clamping mechanism; 21. First cylinder; 22. Clamping plate; 23. Fixed plate; 24. Sealing gasket;

[0028] 3. Limiting mechanism; 31. Air pump; 32. Air duct; 33. Connector; 34. Second cylinder; 35. Limiting block; 36. Sealing sleeve;

[0029] 4. Pressing mechanism; 41. Pressing rod; 42. Slide groove; 43. Slide block; 44. Pressing block; 45. Push-pull rod; 46. Air duct; 47. Sealing ring; 48. Piston disc; 49. Exhaust hole; 410. Intake air duct;

[0030] 99. Water pump outlet. Specific implementation manners

[0031] In order to make the invention objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment: As Figures 1-6 shown, a water pump hydrostatic pressure sealing test bench includes a main body mechanism 1. The main body mechanism 1 includes a pedestal 11. It is characterized in that a limiting mechanism 3 is provided on the pedestal 11. The limiting mechanism 3 includes an air pump 31. The air pump 31 is fixedly connected through an air duct 32 and a connector 33. A pressing mechanism 4 is provided in the connector 33;

[0033] Among them, the pressing mechanism 4 includes a chute 42. There are multiple chutes 42, and the multiple chutes 42 are evenly arranged on the inner wall of the joint 33. A slider 43 is slidably connected in the chute 42. A pressing rod 41 is fixedly connected to the slider 43. A pressing block 44 is fixedly connected to the end of the pressing rod 41 in contact with the water pump outlet 99. A push-pull rod 45 is fixedly connected to one side of the slider 43. The push-pull rod 45 extends towards the direction close to the air duct 32. An air duct 46 is provided on the side wall of the joint 33. The push-pull rod 45 extends into the interior of the air duct 46. A piston disc 48 is fixedly connected to the end of the push-pull rod 45 away from the slider 43. The piston disc 48 is slidably connected to the air duct 46. One end of the air duct 46 close to the slider 43 is sealed by a sealing ring 47. The push-pull rod 45 slidably passes through the sealing ring 47. An exhaust hole 49 for exhausting air is provided at the end of the air duct 46 away from the slider 43. An air inlet duct 410 is provided on the side of one end of the air duct 46 close to the slider 43. The end of the air inlet duct 410 away from the air duct 46 extends out of the inner wall of the joint 33;

[0034] A sealing sleeve 36 is fixedly connected to the inner wall of the joint 33;

[0035] During the test, the outer ring of the water pump outlet 99 abuts against the sealing sleeve 36. The water pump outlet 99, the sealing sleeve 36 and the joint 33 form a sealed space. At the same time, the pressing block 44 presses the water pump outlet 99, so that the water pump outlet 99 closely adheres to the sealing sleeve 36;

[0036] The position where the air inlet duct 410 extends into the joint 33 is above the sealing sleeve 36, and the connection position of the air inlet duct 410 and the air duct 46 is always below the piston disc 48.

[0037] In the embodiment, after the water pump is installed and fixed, then the air pump 31 is started. The air pump 31 fills the gas into the air duct 32. The air duct 32 fills the gas into the water pump through the joint 33. Since the water inlet of the water pump abuts against the fixing plate 23 and the sealing gasket 24 to form a seal, at this time, a sealed space is formed inside the water pump and the joint 33, the air duct 32 and the air pump 31.

[0038] Subsequently, the lifting motor 14 operates, and the output shaft of the lifting motor 14 drives the lead screw 15 to rotate. Under the combined action of the rotation of the lead screw 15 and the limiting effect of the test pool 12 on the lifting plate 13, the lifting plate 13 slides downward in the test pool 12. Since the test pool 12 is filled with water, the lifting plate 13 needs to drive the water pump to be completely submerged in the water, and then stop descending. At this time, it can be observed whether there are bubbles on the pump body of the water pump. Because the air pump 31 fills the gas into the water pump through the air duct 32 and the connector 33, and at the same time, both the water inlet and the water outlet of the water pump are sealed, if the pump body has poor sealing performance, internal gas leakage will occur. At the same time, the user can control the power of the air pump 31 to adjust the pressure inside the water pump, so as to complete the sealing performance of the water pump under different gas pressures.

[0039] It should be noted that when the air pump 31 fills the gas into the water pump through the air duct 32 and the connector 33, a part of the gas enters the air duct 46 from the air inlet channel 410. Due to the sealing of the sealing ring 47, the gas accumulates in the air duct 46. Subsequently, the high-pressure gas pushes the piston disk 48 to slide in the air duct 46. When the piston disk 48 slides, it drives the push rod 45 to move. When the push rod 45 moves, it drives the slider 43 to move in the chute 42. When the slider 43 moves, it drives the abutting rod 41 to drive the abutting block 44 to squeeze the water outlet 99 of the water pump upward, so that the water outlet 99 of the water pump and the sealing sleeve 36 are in closer contact, preventing gas leakage and affecting the test effect.

[0040] At the same time, it should be understood that when the air pump 31 fills the pump body with gases of different pressures, the sealing performance of the water pump under different pressures can be tested. Therefore, when the gas pressure in the pump body is higher, more gas enters the air duct 46 through the air inlet channel 410, and the greater the thrust received by the piston disk 48. Eventually, the greater the thrust of the abutting block 44 on the water outlet 99 of the water pump, so that the sealing performance between the water outlet 99 of the water pump and the sealing sleeve 36 is higher.

[0041] At the same time, the sealing sleeve 36 and the connector 33 are designed in a frustum shape, which can meet the water outlets 99 of various specifications of water pumps. Moreover, the abutting rod 41 and the abutting block 44 slide along with the slider 43, and can squeeze the water outlets 99 of various specifications of water pumps, so as to ensure the sealing performance, and has the characteristic of high adaptability.

[0042] The present invention can fill the gas into the body through the air pump 31, and read the gas pressure value from the air pump 31. Then stop inflating and observe the change of the pressure value, so as to judge the sealing performance of the pump body.

[0043] Such as Figure 1 、 Figure 2 and Figure 3As shown, the main body mechanism 1 further includes a test pool 12, the test pool 12 is fixedly connected to the pedestal 11, a lifting plate 13 is arranged in the test pool 12, screw rods 15 are threadedly connected to both sides of the lifting plate 13, one end of each screw rod 15 is fixedly connected to a lifting motor 14, the lifting motor 14 is fixedly connected to the test pool 12, and the lifting plate 13 is slidably connected to the test pool 12;

[0044] A fixed clamping mechanism 2 is arranged in the test pool 12, the fixed clamping mechanism 2 includes a first cylinder 21, the first cylinder 21 is fixedly connected to the upper end surface of the lifting plate 13, the output end of the first cylinder 21 is fixedly connected to a clamping plate 22, the clamping plate 22 is slidably connected to the upper end surface of the lifting plate 13, and a fixing plate 23 is arranged on one side of the clamping plate 22, the fixing plate 23 is fixedly connected to the upper end surface of the lifting plate 13;

[0045] A sealing gasket 24 is fixedly connected to one end of the fixing plate 23 close to the clamping plate 22.

[0046] In the embodiment, first, place the water pump to be tested on the lifting plate 13, make the water suction end of the water pump face the fixing plate 23, and make the water outlet end of the water pump face upward. Then start the first cylinder 21 to work. The output end of the first cylinder 21 pushes the clamping plate 22 to slide on the lifting plate 13. When the clamping plate 22 slides, it pushes the water pump on the lifting plate 13 to move. Then the water suction end of the water pump contacts the sealing gasket 24 on the fixing plate 23. Finally, the water suction end of the water pump abuts against the sealing gasket 24 to form a seal, and the water pump is fixed.

[0047] As Figure 3 、 Figure 4 and Figure 5 shown, the limiting mechanism 3 further includes a second cylinder 34, the second cylinder 34 is fixedly connected to the outer wall of the joint 33, the output end of the second cylinder 34 extends into the joint 33, and a limiting block 35 is fixedly connected to the output end of the second cylinder 34.

[0048] In the embodiment, after the water pump is fixed by the clamping plate 22 and the fixing plate 23, the user holds the joint 33 and slews the joint 33 on the water outlet of the water pump (when slewing, the user should apply enough force to make the water outlet of the water pump and the sealing sleeve 36 on the inner wall of the joint 33 fully contact to form a seal). Then start the second cylinder 34 to work. The output shaft of the second cylinder 34 drives the limiting block 35 to move. Then the limiting block 35 fits with the neck of the water outlet of the water pump (at this time, it is not completely fixed. The limiting block 35 and the neck of the water outlet of the water pump can slide relative to each other, but there is a frictional force for movement and they need to be pulled to slide relative to each other), completing the preliminary fixing of the joint 33 and the water outlet 99 of the water pump.

[0049] The working process is as follows:

[0050] First, place the water pump to be tested on the lifting plate 13, with the suction end of the water pump facing the fixed plate 23 and the outlet end of the water pump facing upward. Then, start the first cylinder 21 to work. The output end of the first cylinder 21 pushes the clamping plate 22 to slide on the lifting plate 13. When the clamping plate 22 slides, it pushes the water pump on the lifting plate 13 to move. Subsequently, the suction end of the water pump contacts the sealing gasket 24 facing the fixed plate 23, and finally, the suction end of the water pump abuts against the sealing gasket 24 to form a seal, and the water pump is fixed. After the water pump is fixed by the clamping plate 22 and the fixed plate 23, the user holds the joint 33 and slews the joint 33 on the water outlet of the water pump. Then, start the second cylinder 34 to work. The output shaft of the second cylinder 34 drives the limiting block 35 to move. Subsequently, the limiting block 35 fits with the neck of the water outlet of the water pump, completing the preliminary fixation of the joint 33 and the water outlet 99 of the water pump. After the water pump is installed and fixed, then start the air pump 31. The air pump 31 fills the gas into the air duct 32. The air duct 32 fills the gas into the water pump through the joint 33. Because the water inlet of the water pump abuts against the fixed plate 23 and the sealing gasket 24 to form a seal, at this time, a sealed space is formed inside the water pump and between the joint 33, the air duct 32, and the air pump 31. At the same time, when the air pump 31 fills the gas into the water pump through the air duct 32 and the joint 33, a part of the gas enters the air duct 46 from the air inlet duct 410. Because of the seal of the sealing ring 47, the gas accumulates in the air duct 46. Subsequently, the high-pressure gas pushes the piston disk 48 to slide in the air duct 46. When the piston disk 48 slides, it drives the push rod 45 to move. When the push rod 45 moves, it drives the slider 43 to move in the chute 42. When the slider 43 moves, it drives the abutting rod 41 to drive the abutting block 44 to squeeze the water outlet 99 of the water pump upward, making the water outlet 99 of the water pump and the sealing sleeve 36 contact more closely to prevent gas leakage and affect the test effect. Subsequently, the lifting motor 14 works. The output shaft of the lifting motor 14 drives the lead screw 15 to rotate. Under the limiting effect of the lead screw 15 rotating and the test pool 12 on the lifting plate 13, the lifting plate 13 slides downward in the test pool 12. Because there is water in the test pool 12, the lifting plate 13 needs to drive the water pump to be completely submerged in the water, and then stop descending. At this time, it can be observed whether there are water bubbles on the pump body of the water pump. Because after the air pump 31 fills the gas into the water pump through the air duct 32 and the joint 33, and at the same time, both the water inlet and the water outlet of the water pump are sealed, if the pump body has poor sealing performance, the situation of internal gas leakage will occur. At the same time, the user can control the power of the air pump 31 to adjust the pressure inside the water pump, so as to complete the sealing performance of the water pump under different gas pressures.

[0051] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0052] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above-described embodiments and descriptions in the specification are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all such changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A water pump hydrostatic pressure sealing test bench, comprising a main body mechanism (1), the main body mechanism (1) includes a pedestal (11), characterized in that, A limiting mechanism (3) is provided on the pedestal (11). The limiting mechanism (3) includes an air pump (31). The air pump (31) is fixedly connected through an air duct (32) and a connector (33). A tightening mechanism (4) is provided inside the connector (33). Among them, the tightening mechanism (4) includes a plurality of sliding grooves (42). The plurality of sliding grooves (42) are evenly formed on the inner wall of the connector (33). A slider (43) is slidably connected in the sliding groove (42). A tightening rod (41) is fixedly connected to the slider (43). A tightening block (44) is fixedly connected to the end of the tightening rod (41) in contact with the water pump outlet (99). A push-pull rod (45) is fixedly connected to one side of the slider (43). The push-pull rod (45) extends in the direction close to the air duct (32). An air passage (46) is provided on the side wall of the connector (33). The push-pull rod (45) extends into the interior of the air passage (46). A piston disk (48) is fixedly connected to the end of the push-pull rod (45) away from the slider (43). The piston disk (48) is slidably connected to the air passage (46). One end of the air passage (46) close to the slider (43) is sealed by a sealing ring (47). The push-pull rod (45) slidably passes through the sealing ring (47). An exhaust hole (49) for exhausting air is provided at the end of the air passage (46) away from the slider (43). An air inlet passage (410) is provided on the side of one end of the air passage (46) close to the slider (43). The end of the air inlet passage (410) away from the air passage (46) extends out of the inner wall of the connector (33). A sealing sleeve (36) is fixedly connected to the inner wall of the connector (33). The sealing sleeve (36) and the connector (33) are designed in a frustum shape. During the test, the outer ring of the water pump outlet (99) abuts against the sealing sleeve (36). The water pump outlet (99), the sealing sleeve (36) and the connector (33) form a sealed space. At the same time, the tightening block (44) presses the water pump outlet (99) so that the water pump outlet (99) closely adheres to the sealing sleeve (36).

2. The water pump hydrostatic pressure sealing test bench as described in claim 1, wherein The main body mechanism (1) further includes a test pool (12). The test pool (12) is fixedly connected to the pedestal (11). A lifting plate (13) is provided inside the test pool (12). Threaded rods (15) are connected to both sides of the lifting plate (13). One end of the threaded rod (15) is fixedly connected to a lifting motor (14). The lifting motor (14) is fixedly connected to the test pool (12). The lifting plate (13) is slidably connected to the test pool (12).

3. The water pump hydrostatic pressure sealing performance test bench as described in claim 2, wherein, A fixed clamping mechanism (2) is provided in the test pool (12). The fixed clamping mechanism (2) includes a first cylinder (21). The first cylinder (21) is fixedly connected to the upper end surface of the lifting plate (13). The output end of the first cylinder (21) is fixedly connected to a clamping plate (22). The clamping plate (22) is slidably connected to the upper end surface of the lifting plate (13). One side of the clamping plate (22) is provided with a fixed plate (23). The fixed plate (23) is fixedly connected to the upper end surface of the lifting plate (13).

4. The water pump hydrostatic pressure sealing performance test bench as described in claim 3, characterized in that, A sealing gasket (24) is fixedly connected to one end of the fixed plate (23) close to the clamping plate (22).

5. The water pump hydrostatic pressure sealing performance test bench as described in claim 4, characterized in that, The limiting mechanism (3) further includes a second cylinder (34). The second cylinder (34) is fixedly connected to the outer wall of the joint (33). The output end of the second cylinder (34) extends into the joint (33). The output end of the second cylinder (34) is fixedly connected to a limiting block (35).

6. The water pump hydrostatic pressure sealing performance test bench as described in claim 5, wherein A sealing sleeve (36) is fixedly connected to the inner wall of the joint (33).

7. The water pump hydrostatic pressure sealing performance test bench according to claim 6, wherein, During the test, the outer ring of the water pump outlet (99) abuts against the sealing sleeve (36). The water pump outlet (99), the sealing sleeve (36) and the joint (33) form a sealed space. At the same time, the pressing block (44) presses the water pump outlet (99) so that the water pump outlet (99) closely adheres to the sealing sleeve (36).

8. The water pump hydrostatic pressure sealing performance test bench according to claim 6, characterized in that, The position where the air inlet duct (410) extends into the joint (33) is above the sealing sleeve (36). The connection position of the air inlet duct (410) and the air duct (46) is always below the piston disc (48).

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