Hydrogen fuel cell air compressor sealing performance test bench

Abstract

The utility model belongs to the technical field of hydrogen fuel cell air compressors, and particularly relates to a hydrogen fuel cell air compressor sealing performance test board, which comprises an air source rack, a lifting rack, an air compressor mounting rack, a motor shell mounting rack, a pipeline system and a connection relation thereof. According to the utility model, the test bench can carry out an early-stage sealing test on the motor housing in a quality inspection warehousing link, so that defects in an early-stage processing and manufacturing process can be found in time, and hidden dangers are prevented from being brought into a whole machine assembling link; in the whole machine assembly link, the whole air compressor can be subjected to a sealing test before delivery, problems occurring in the assembly process can be found in time, and unnecessary hidden dangers of products are avoided; the test board moves the air compressor or the motor shell to be tested through the slide rail, and is simple and labor-saving; and the test bench is provided with a plurality of sealing limiting assemblies, so that fingers of the assembly personnel can be protected from being injured by collision or clamping.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel cell air compressors, in particular to a hydrogen fuel cell air compressor sealing performance test bench. Background Art

[0002] As an important component, the air compressor (hereinafter referred to as "air compressor") mainly provides a steady stream of compressed air for hydrogen fuel cells and is known as the lungs of hydrogen fuel cell engines. The typical air compressor structure is mainly composed of internal impellers, main shafts, bearings, motor stators, and external volutes, interstage pipes, motor housings, sockets, joints and other components; when the air compressor is working, the internal cavity is filled with flowing compressed air. In addition to supplying the battery stack to the outside, this air also plays many roles such as cooling the main shaft and motor stator, supporting and cooling bearings; at the same time, the interlayer channel on the outer wall of the air compressor motor housing is filled with flowing low-pressure coolant, which plays the role of cooling important components such as the motor housing and motor stator, and the coolant can be recycled. The air cavity and the coolant cavity are two independent fluid areas. Whether the air compressor is stationary or working, no leakage is allowed, and compressed air and low-pressure coolant are not allowed to leak from each other.

[0003] At present, domestic air compressors for hydrogen fuel cells are mainly customized based on customer needs. There are certain differences in the structure and installation methods of air compressors at different power levels and different application scenarios, which makes it difficult to achieve uniformity in the test bench when testing the sealing performance of motor housings and air compressors. Therefore, if the control is not strict during the processing of manufacturing, quality inspection and warehousing, whole machine assembly, and sealing testing, the following problems are likely to occur:

[0004] 1. The motor housing of the air compressor generally needs to go through multiple process steps such as casting, machining, anodizing, etc., and has a complex shape and a small wall thickness. There are often complex and fine channels inside, which are prone to defects such as micropores, cracks, collapse, deformation, and channel penetration. It is not easy to observe from the surface, which ultimately leads to potential leakage risks of the coolant;

[0005] 2. When assembling the whole machine of the air compressor, sealing rings, gaskets, sealing rings, sealants and other seals are generally installed at the joints of multiple parts or the matching of shaft holes. It is easy to be improperly assembled or damaged, and it is impossible to directly check, which eventually leads to potential leakage risks of compressed air or coolant at the sealing position;

[0006] 3. Different models of motor housings and air compressors have different structural dimensions, interface forms, interface positions, etc., making it difficult to directly conduct sealing performance tests;

[0007] 4. When testing the seal of the motor housing and air compressor, they are generally in an open or semi-open area and are not fixed. The pipe openings and heads lack safety protection, and it is easy for the seal test heads and pipes to fly out and injure the operators. Utility Model Content

[0008] The purpose of the utility model is to solve the technical problems existing in the background technology, and for this purpose, a hydrogen fuel cell air compressor sealing performance test bench is provided.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0010] A hydrogen fuel cell air compressor sealing performance test bench, comprising an air source stand, a lifting stand, an air compressor mounting stand, a motor housing mounting stand and a pipeline system, wherein a lifting stand is installed between the air compressor mounting stand and the motor housing mounting stand;

[0011] The air compressor installation stand comprises an air compressor support frame, a first cast iron platform, a first slide rail system and a first support plate which are placed in sequence from bottom to top, the first slide rail system is fixedly mounted on the first cast iron platform by screws, the first slide rail system and the first support plate are slidably connected, and the air compressor to be measured is placed on the first support plate;

[0012] The motor housing mounting stand comprises a motor housing support frame, a second cast iron platform, a second slide rail system and a second support plate which are sequentially placed from bottom to top, the second slide rail system is fixedly mounted on the second cast iron platform by screws, the second slide rail system and the second support plate are slidably connected, and a motor housing of a test object is placed on the second support plate;

[0013] The lifting platform comprises a water tank support frame, a water storage tank, a base, a lifting platform, a third support plate and a third slide rail system which are placed in sequence from bottom to top, and the base, the lifting platform, the third support plate and the third slide rail system are all in the water storage tank;

[0014] Under the action of the lifting platform's ascending operation, the third slide rail system is located outside the top of the water tank and is aligned parallel to the first slide rail system and the second slide rail system. The first slide rail system and the second slide rail system both include slide rails and sliders, and the third slide rail system only includes sliders, and the slide rails of the three are aligned parallel.

[0015] The following is a technical solution further defined by the utility model, wherein the air source stand includes an air pump support frame, a high-pressure air pump and a pressure tester, wherein the high-pressure air pump is installed at the lower part of the air pump support frame, and the pressure tester is installed at the upper part of the air pump support frame, and the high-pressure air pump and the pressure tester are connected by pipelines.

[0016] The following is a technical solution further defined by the present utility model, wherein the pipeline system includes a sealing test gas main circuit, a first test joint, a second test joint and a third test joint, wherein the sealing test gas main circuit is connected to a pressure tester pipeline, wherein the first test joint, the second test joint and the third test joint are respectively connected to the sealing test gas main circuit pipeline, wherein the first test joint is connected to an air compressor sealing test inner cavity air inlet pipeline, wherein the second test joint is connected to an air compressor sealing test outer cavity air inlet pipeline, wherein the third test joint is connected to a motor housing sealing test outer cavity air inlet pipeline.

[0017] The following is a technical solution further defined by the present utility model, wherein the pipeline system further includes a first branch of sealing test gas, a second branch of sealing test gas, a third branch of sealing test gas, a fourth branch of sealing test gas, a fifth branch of sealing test gas, a first purge gas circuit, a second purge gas circuit, a first purge gun, and a second purge gun; the sealing test gas main circuit and the first test joint are connected by a pipeline via the first branch of sealing test gas, the sealing test gas main circuit and the second test joint are connected by a pipeline via the second branch of sealing test gas, the sealing test gas main circuit and the third test joint are connected by a pipeline via the third branch of sealing test gas, the fourth branch of sealing test gas is connected to the first purge gun pipeline via the first purge gas circuit, and the fifth branch of sealing test gas is connected to the second purge gun pipeline via the second purge gas circuit.

[0018] The following is a technical solution further defined by the utility model, wherein the gas source stand also includes a first pressure gauge, a second pressure gauge, a first manual valve, a second manual valve, a third manual valve, a cushion block and a riding card; the air pressure of the high-pressure air pump is detected by the first pressure gauge, a first manual valve is arranged on the pipeline between the high-pressure air pump and the pressure tester, a second manual valve is arranged on the pipeline between the high-pressure air pump and the second purge air circuit, a third manual valve is arranged on the pipeline between the high-pressure air pump and the first purge air circuit, the riding card is installed on the cushion block by screws, and the riding card is used to fix the first manual three-way valve and the second manual three-way valve.

[0019] The following is a technical solution further defined by the present utility model, wherein the lifting platform also includes a ratchet wrench and a drain valve, the ratchet wrench is connected to the lifting platform for controlling the lifting of the lifting platform, and the drain valve is connected to the water tank.

[0020] The following is a technical solution further defined by the utility model, wherein the air compressor mounting stand also includes a limit plate and a locking wrench, wherein the locking wrench is used to fix or loosen the slider in the first slide rail system, wherein the limit plate is fixed to the end of the slide rail in the first slide rail system, and wherein the limit plate cooperates with the slide rail of the third slide rail system.

[0021] Compared with the prior art, the utility model has the following technical effects:

[0022] 1. In the quality inspection and warehousing stage, the test bench of the utility model can be used to conduct preliminary sealing tests on the motor housing part, so as to timely discover defects in the early processing and manufacturing process and avoid bringing hidden dangers into the whole machine assembly stage;

[0023] 2. In the whole machine assembly process, the test bench of the utility model can be used to conduct a sealing test on the air compressor as a whole before delivery, so as to timely discover problems in the assembly process and avoid unnecessary hidden dangers of the product;

[0024] 3. The test bench moves the air compressor or motor housing to be tested through the slide rail, which is simple and labor-saving; the test bench is equipped with multiple sealing limit components to protect the fingers of the assembler from being bumped or pinched;

[0025] 4. The test bench can also meet the sealing test of motor housings and air compressors of different models through simple interface modification, thus improving the versatility of the test bench.

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 : Schematic diagram of the hydrogen fuel cell air compressor sealing performance test bench;

[0029] Figure 2 : Structure diagram of the gas source frame of the hydrogen fuel cell air compressor sealing performance test bench;

[0030] Figure 3 : Structure diagram of the lifting platform for the hydrogen fuel cell air compressor sealing performance test bench;

[0031] Figure 4 : The first view of the structure diagram of the air compressor installation stand of the hydrogen fuel cell air compressor sealing performance test bench;

[0032] Figure 5 : The second view of the structure diagram of the air compressor installation stand of the hydrogen fuel cell air compressor sealing performance test bench;

[0033] Figure 6: The first view of the structure diagram of the motor housing installation stand of the hydrogen fuel cell air compressor sealing performance test stand;

[0034] Figure 7 : The second view of the structure diagram of the motor housing installation stand of the hydrogen fuel cell air compressor sealing performance test bench;

[0035] Figure 8 : Pipeline system structure diagram of hydrogen fuel cell air compressor sealing performance test bench;

[0036] Fig. 9 : Main view of the hydrogen fuel cell air compressor sealing performance test bench;

[0037] Fig.10 : Top view of the hydrogen fuel cell air compressor sealing performance test bench;

[0038] Fig.11 : The first-person perspective isometric view of the hydrogen fuel cell air compressor sealing performance test bench;

[0039] Fig.12 : The second perspective isometric view of the hydrogen fuel cell air compressor sealing performance test bench.

[0040] Reference numerals:

[0041] 100-gas source stand;

[0042] 200-lifting platform;

[0043] 300-Air compressor installation stand;

[0044] 400-Motor housing mounting stand;

[0045] 500-pipeline system;

[0046] 101-air pump support frame;

[0047] 102- high pressure air pump;

[0048] 103- Withstand voltage tester;

[0049] 104- first pressure gauge;

[0050] 105- second pressure gauge;

[0051] 106-first manual valve;

[0052] 107- second manual valve;

[0053] 108-third manual valve;

[0054] 109- pad;

[0055] 110- Horse riding card;

[0056] ON / OFF-Start / stop switch of the withstand voltage tester;

[0057] 201-water tank support frame;

[0058] 202- water storage tank;

[0059] 203-base;

[0060] 204-lifting platform;

[0061] 205-third supporting plate;

[0062] 206-third slide rail system;

[0063] 207-Ratchet wrench;

[0064] 208-drain valve;

[0065] 301-air compressor support frame;

[0066] 302-first cast iron platform;

[0067] 303-first slide rail system;

[0068] 304-limiting piece;

[0069] 305-locking wrench;

[0070] 306-first supporting plate;

[0071] 307-Air compressor;

[0072] 308-First level side lifting lug fixing assembly;

[0073] 309-Secondary side lifting lug fixing assembly;

[0074] 310-socket sealing assembly;

[0075] 311-First-stage volute seal assembly;

[0076] 312-First-stage volute seal limit assembly;

[0077] 313-Secondary volute seal assembly;

[0078] 314-Secondary volute seal limit assembly;

[0079] 315-Coolant outlet seal assembly;

[0080] 316-Coolant outlet sealing limit assembly;

[0081] A-Air compressor sealing test cavity air inlet;

[0082] B-Air compressor sealing test outer cavity air inlet;

[0083] 401-motor housing support frame;

[0084] 402-second cast iron platform;

[0085] 403-second slide rail system;

[0086] 404-limiting piece;

[0087] 405-locking wrench;

[0088] 406 - second supporting plate;

[0089] 407-motor housing;

[0090] 408-First level side lifting lug fixing assembly;

[0091] 409-Secondary side lifting lug fixing assembly;

[0092] 410-Coolant outlet seal assembly;

[0093] 411-Coolant outlet sealing limit assembly;

[0094] C-motor housing seal test outer cavity air inlet;

[0095] 501- Main sealing test gas line;

[0096] 502-first purge gas path;

[0097] 503-second purge gas path;

[0098] 504-seal test gas first branch;

[0099] 505-Second branch of sealing test gas;

[0100] 506-seal test gas third branch;

[0101] 507- fourth branch of sealing test gas;

[0102] 508-seal test gas fifth branch;

[0103] 509-first manual three-way valve;

[0104] 510-second manual three-way valve;

[0105] 511-first purge gun;

[0106] 512-second purge gun;

[0107] 513-first test connector;

[0108] 514-second test connector;

[0109] 515-third test connector;

[0110] 516-first fixed adjustable bracket;

[0111] 517-second fixed adjustable bracket;

[0112] 518-third fixed adjustable bracket;

[0113] 519-Fourth fixed adjustable bracket;

[0114] 520 - Fifth fixed adjustable bracket. DETAILED DESCRIPTION

[0115] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0116] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0117] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0118] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0119] like Figure 1-12 As shown, a hydrogen fuel cell air compressor sealing performance test bench is provided to assist in the sealing performance test of the motor housing and the air compressor.

[0120] like Figure 1 As shown, a hydrogen fuel cell air compressor sealing performance test bench specifically includes: an air source stand 100, a lifting stand 200, an air compressor mounting stand 300, a motor housing mounting stand 400, and a pipeline system 500, which are composed of five parts in total.

[0121] Specific working principle:

[0122] Turn on the power supply, the high-pressure air pump 102 starts to work, fills in a certain pressure of high-pressure air and stores it; open the first manual valve 106, the high-pressure air enters the pressure tester 103, and the pressure of the high-pressure air is reduced to the sealing performance test pressure value by adjustment; the water storage tank 202 of the lifting platform 200 is filled with clean water, and the lifting platform 204 is in the lifting state;

[0123] When the air compressor 307 in the air compressor installation stand 300 is used as the object to be tested, the object to be tested is pushed onto the lifting stand 200 along the slide rail, the A port of the air compressor 307 is connected to the first test joint 513, and the B port is connected to the second test joint 514, and then the air compressor 307 is lowered into the water along with the lifting stand 204; the first manual three-way valve 509 is pointed to M1, the second manual three-way valve 510 is pointed to N2, the start / stop switch of the pressure tester 103 is pressed to ON, and the second pressure is observed. When the pressure value of the gauge 105 meets the sealing requirement, press it to OFF, perform the pressure-maintaining operation, and observe whether the air compressor 307 has air leakage; after observing for a period of time, if bubbles appear in the water, the sealing test is qualified, and if no bubbles appear in the water, the sealing test fails; after the sealing test, the air compressor 307 under test returns to the air compressor mounting stand 300, and at this time, the second manual valve 107 is opened, and the attached water on the surface of the air compressor 307 is purged through the P1 port of the first purge gun 511;

[0124] When the motor housing 407 in the air compressor mounting stand 400 is used as the object to be tested, the object to be tested is pushed onto the lifting stand 200 along the slide rail, the C port of the motor housing 407 is connected to the third test joint 515, and then the motor housing 407 is lowered into the water along with the lifting platform 204; the first manual three-way valve 509 is pointed to M3, the second manual three-way valve is pointed to N3, the start / stop switch of the pressure tester is pressed to ON, and when the pressure value of the second pressure gauge 105 meets the sealing requirement, it is pressed to OFF, and the pressure holding operation is performed to observe whether there is leakage in the motor housing 407; after observing for a period of time, if bubbles appear in the water, the sealing test is qualified, and if no bubbles appear in the water, the sealing test fails; after the sealing test is completed, the motor housing 407 of the object to be tested returns to the motor housing mounting stand 400, at this time, the third manual valve 108 is opened, and the attached water on the surface of the motor housing 407 is purged through the P2 port of the second purge gun 512;

[0125] When the first pressure gauge 104 shows that the air source pressure is insufficient, the high-pressure air pump 102 will automatically start to replenish air.

[0126] like Figure 2 As shown, the air source stand 100 mainly provides stable and reliable pressurized air for the test bench, and mainly includes the following components: a high-pressure air pump 102 is placed at the lower part of the air pump support frame 101, and mainly provides a stable and reliable high-pressure air source for the sealing test of the test bench and the purging of the object to be tested, and is fed back by the first pressure gauge 104. If the air source pressure is insufficient, the high-pressure air pump 102 will automatically start to replenish air; a pressure tester 103 is placed at the upper part of the air pump support frame 101, and mainly performs pressure reduction and pressure maintenance on the high-pressure air from the high-pressure air pump 102, and is fed back by the second pressure gauge 105. The start and stop of the pressure tester 103 is controlled by the start / stop switch ON / OFF of the pressure tester; when performing continuous sealing test tasks, the first manual valve 106, the second manual valve 107, and the third manual valve 108 can be in a normally open state; the pad 109 and the riding card 110 are mainly used to fix the first manual three-way valve 509 and the second manual three-way valve 510.

[0127] like Figure 3As shown, the lifting platform 200 mainly provides the function of raising and lowering the air compressor and motor housing of the test object, and mainly includes the following components: the water tank 202 is placed on the upper part of the water tank support frame 201, and the base 203, the lifting platform 204, the third support plate 205, and the third slide rail system 206 are placed in the water tank in a bottom-up order and fixed with screws; the third slide rail system 206 is used to place and fix the air compressor 307 and the motor housing 407 of the test object; the lifting and lowering of the lifting platform 204 is controlled by the ratchet wrench 207; if the test bench performs a continuous sealing test task, the water tank should be filled with clean water. If there is no sealing test task, all the water is drained through the drain valve 208, and the first purge gun 511 or the second purge gun 512 is used to completely purge the inside of the water tank.

[0128] like Figure 4 and 5 As shown, the air compressor mounting stand 300 is mainly used to fix the air compressor 307 to be tested, and mainly includes the following components: the air compressor support frame 301, the first cast iron platform 302, the first slide rail system 303, and the first support plate 306 are placed in a bottom-up order and fixed with screws; the air compressor 307 to be tested is fixed above the first support plate 306 through the first-level side ear fixing component 308 and the second-level side ear fixing component 309; the first-level volute inlet, the second-level volute outlet, the coolant outlet, and the socket outlet of the air compressor 307 are respectively blocked through the first-level volute sealing component 311, the second-level volute sealing component 313, the coolant outlet sealing component 315, and the socket sealing component 310; when performing the sealing test task, the air inlet A of the air compressor sealing test cavity is connected to the first test joint 513, the air compressor The air inlet B of the outer cavity of the machine seal test is connected to the second test joint 514. In order to prevent the pressurized air in the inner cavity from blowing the seal component away and injuring the operator, three safety auxiliary units are added, namely, the first-level volute seal limit assembly 312, the second-level volute seal limit assembly 314, and the coolant outlet seal limit assembly 316; the locking wrench 305 is used to fix and loosen the slider in the first slide rail system 303 to control the advance and retreat of the air compressor 307 under test; the limit plate 304 is fixed to the end of the slide rail in the first slide rail system 303 and extends a distance. The purpose is to use the limit plate 304 to enable the third slide rail system 206 in the lifting platform 200 to rise to the same height as the first slide rail system 303, thereby ensuring that the air compressor 307 under test can slide back and forth freely in the lifting platform 200 and the air compressor installation platform 300.

[0129] like Figure 6 and 7As shown, the motor housing mounting stand 400 is mainly used to fix the motor housing 407 of the object to be tested, and mainly includes the following components: the motor housing support frame 401, the second cast iron platform 402, the second slide rail system 403, and the second support plate 406 are placed in a bottom-up order and fixed with screws; the motor housing 407 of the object to be tested is fixed above the second support plate 406 through the primary side lifting ear fixing component 408 and the secondary side lifting ear fixing component 409; the coolant outlet of the motor housing 407 is blocked by the coolant outlet sealing component 410; when performing the sealing test task, the air inlet C of the outer cavity of the motor housing sealing test is connected to the third test connector 515, in order to In order to prevent the pressurized air in the external cavity from blowing the sealing component away and injuring the operator, a safety auxiliary unit, a coolant outlet sealing limit assembly 411, is added; the locking wrench 405 is used to fix and loosen the slider in the second slide rail system 403 to control the advance and retreat of the motor housing 407 of the object to be measured; the limit plate 404 is fixed to the end of the slide rail in the second slide rail system 403 and extends a certain distance. The purpose is to use the limit plate 404 to enable the third slide rail system 206 in the lifting platform 200 to rise to the same height as the second slide rail system 403, thereby ensuring that the motor housing 407 of the object to be measured can slide back and forth freely in the lifting platform 200 and the motor housing mounting platform 400.

[0130] like Figure 8 As shown, the pipeline system 500 is mainly responsible for the on-off function of the sealing gas and the purge gas, and mainly includes the following components:

[0131] When the first manual three-way valve 509 points to M1, the first branch 504, the second branch 505, and the third branch 506 of the sealing test gas are all opened; when it points to M2, the first branch 504, the second branch 505 of the sealing test gas are opened; when it points to M3, the first branch 504, the third branch 506 of the sealing test gas are opened; when the second manual three-way valve 510 points to N1, the third branch 506, the fourth branch 507, and the fifth branch 508 of the sealing test gas are all opened; when it points to N2, the third branch 506, the fifth branch 508 of the sealing test gas are opened; when it points to N3, the third branch 506, the fourth branch 507 of the sealing test gas are opened; 09 and the second manual three-way valve 510 can be used in combination to adjust the different air outlet modes of the first test joint 513, the second test joint 514, and the third test joint 515, so as to meet different sealing test requirements; the first purge gun 511 is always connected to the first purge air circuit 502 to perform the purge task for the air compressor 307 of the object to be tested; the second purge gun 512 is always connected to the second purge air circuit 503 to perform the purge task for the motor housing 407 of the object to be tested; the first fixed adjustable bracket 516, the second fixed adjustable bracket 517, the third fixed adjustable bracket 518, the fourth fixed adjustable bracket 519, and the fifth fixed adjustable bracket 520 are all repeatable bendable metal hoses. While fixing the air test joint and the purge gun, the angle and height can be adjusted arbitrarily to meet the sealing test and purge tasks of different objects to be tested.

[0132] like Figure 9-12 As shown, the air compressor sealing performance test bench 1000 has a specific structure consisting of five parts, namely, the air source stand 100, the lifting stand 200, the air compressor mounting stand 300, the motor housing mounting stand 400, and the pipeline system 500. Among them, the air source stand 100, the lifting stand 200, the air compressor mounting stand 300, and the motor housing mounting stand 400 are placed in sequence according to the positions shown in the figure, ensuring that the front end frames of the four stands are aligned and the top tables are adjusted to the same height; ensuring that the slide rails of the lifting stand 200, the air compressor mounting stand 300, and the motor housing mounting stand 400 are aligned in parallel. The sealing test gas main circuit 501 is connected to the first manual valve 106 and the pressure tester 103, the first purge gas circuit 502 is connected to the third manual valve 108, the second purge gas circuit 503 is connected to the second manual valve 107, the sealing test gas first branch circuit 504 is connected to the pressure tester 103, the first fixed adjustable bracket 516, the second fixed adjustable bracket 517, and the third fixed adjustable bracket 518 are fixed on the edge of the water tank 202 in sequence, the fourth fixed adjustable bracket 519 is fixed on the edge of the air compressor mounting stand 300, and the fifth fixed adjustable bracket 520 is fixed on the edge of the motor housing mounting stand 400.

[0133] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the utility model by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the utility model without departing from the content of the technical solution of the utility model should be included in the protection scope of the utility model.

Claims

1. A hydrogen fuel cell air compressor sealing performance test bench, characterized in that: It includes an air source stand, a lifting stand, an air compressor mounting stand, a motor housing mounting stand and a piping system, and a lifting stand is installed between the air compressor mounting stand and the motor housing mounting stand; The air compressor installation stand comprises an air compressor support frame, a first cast iron platform, a first slide rail system and a first support plate which are placed in sequence from bottom to top, the first slide rail system is fixedly mounted on the first cast iron platform by screws, the first slide rail system and the first support plate are slidably connected, and the air compressor to be measured is placed on the first support plate; The motor housing mounting stand comprises a motor housing support frame, a second cast iron platform, a second slide rail system and a second support plate which are sequentially placed from bottom to top, the second slide rail system is fixedly mounted on the second cast iron platform by screws, the second slide rail system and the second support plate are slidably connected, and a motor housing of a test object is placed on the second support plate; The lifting platform comprises a water tank support frame, a water storage tank, a base, a lifting platform, a third support plate and a third slide rail system which are placed in sequence from bottom to top, and the base, the lifting platform, the third support plate and the third slide rail system are all in the water storage tank; Under the ascending action of the lifting platform, the third slide rail system is located outside the top of the water tank and is aligned parallel to the first slide rail system and the second slide rail system.

2. A hydrogen fuel cell air compressor sealing performance test bench as claimed in claim 1, characterized in that: The air source stand includes an air pump support frame, a high-pressure air pump and a pressure tester. The high-pressure air pump is installed at the lower part of the air pump support frame, and the pressure tester is installed at the upper part of the air pump support frame. The high-pressure air pump and the pressure tester are connected by pipelines.

3. A hydrogen fuel cell air compressor sealing performance test bench as claimed in claim 2, characterized in that: The pipeline system includes a sealing test gas main line, a first test joint, a second test joint and a third test joint. The sealing test gas main line is connected to the pressure tester pipeline, the first test joint, the second test joint and the third test joint are respectively connected to the sealing test gas main line pipeline, the first test joint is connected to the air compressor sealing test inner cavity air inlet pipeline, the second test joint is connected to the air compressor sealing test outer cavity air inlet pipeline, and the third test joint is connected to the motor housing sealing test outer cavity air inlet pipeline.

4. A hydrogen fuel cell air compressor sealing performance test bench as claimed in claim 3, characterized in that: The pipeline system also includes a first branch of sealing test gas, a second branch of sealing test gas, a third branch of sealing test gas, a fourth branch of sealing test gas, a fifth branch of sealing test gas, a first purge gas circuit, a second purge gas circuit, a first purge gun, and a second purge gun; the sealing test gas main circuit and the first test joint are connected by a pipeline via the first branch of sealing test gas, the sealing test gas main circuit and the second test joint are connected by a pipeline via the second branch of sealing test gas, the sealing test gas main circuit and the third test joint are connected by a pipeline via the third branch of sealing test gas, the fourth branch of sealing test gas is connected to the first purge gun pipeline via the first purge gas circuit, and the fifth branch of sealing test gas is connected to the second purge gun pipeline via the second purge gas circuit.

5. A hydrogen fuel cell air compressor sealing performance test bench as claimed in claim 2, characterized in that: The gas source stand also includes a first pressure gauge, a second pressure gauge, a first manual valve, a second manual valve, a third manual valve, a cushion block and a riding card; the air pressure of the high-pressure air pump is detected by the first pressure gauge, a first manual valve is arranged on the pipeline between the high-pressure air pump and the pressure tester, a second manual valve is arranged on the pipeline between the high-pressure air pump and the second purge air circuit, a third manual valve is arranged on the pipeline between the high-pressure air pump and the first purge air circuit, the riding card is installed on the cushion block by screws, and the riding card is used to fix the first manual three-way valve and the second manual three-way valve.

6. A hydrogen fuel cell air compressor sealing performance test bench as claimed in claim 1, characterized in that: The lifting platform also includes a ratchet wrench and a drain valve. The ratchet wrench is connected to the lifting platform for controlling the lifting of the lifting platform, and the drain valve is connected to the water tank.

7. A hydrogen fuel cell air compressor sealing performance test bench as claimed in claim 1, characterized in that: The air compressor mounting stand also includes a limit plate and a locking wrench, wherein the locking wrench is used to fix or loosen the slider in the first slide rail system, the limit plate is fixed to the end of the slide rail in the first slide rail system, and the limit plate cooperates with the slide rail of the third slide rail system.

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