Air compressor test device for hydrogen fuel cell of new energy automobile

Abstract

The invention relates to an air compressor test device for a hydrogen fuel cell of a new energy automobile. The test device comprises a rack, a control module, a gas loop system and a cooling water loop system, the gas loop system comprises a gas inlet path and a gas outlet path; the air inlet path comprises an air inlet pipe, an air suction filter, a first flow meter, a first temperature sensor and a first pressure sensor; the exhaust path comprises an exhaust pipe, a back pressure valve, a first gate valve, a second temperature sensor and a second pressure sensor; the cooling water loop system is used for providing cooling water to cool the air compressor; the control module is connected with the first temperature sensor, the first pressure sensor, the second temperature sensor, the second pressure sensor and the first flow meter, the control module is further connected with the back pressure valve and used for adjusting the opening degree of the back pressure valve, and the control module is further connected with the air compressor and used for adjusting and controlling the rotating speed of the air compressor. Manual testing can be replaced, and therefore parameters such as the flow and the compression ratio of the air compressor can be detected.

Description

Technical Field

[0001] The invention relates to an air compressor testing device for a new energy vehicle hydrogen fuel cell. Background Art

[0002] In the related technology, air compressor tests are mainly conducted manually, usually recording data while testing, then manually filling out forms, and calculating the results before issuing an air compressor test report; not only is the workload large, time-consuming and labor-intensive, but data recording and query are also inconvenient. Moreover, the test process often requires the cooperation of multiple people, resulting in high labor costs and low test efficiency. Summary of the invention

[0003] In view of this, the present invention provides an air compressor test device for new energy vehicle hydrogen fuel cells, which can replace manual testing to detect parameters such as the flow rate and compression ratio of the air compressor.

[0004] In order to achieve the above object, the present invention is implemented by the following technical solutions: An air compressor test device for a hydrogen fuel cell of a new energy vehicle, characterized in that it comprises a frame, a control module, and an air circuit system and a cooling water circuit system arranged on the frame; The gas circuit system includes an air intake path and an exhaust path; The air intake circuit includes an air intake pipe connected to the air intake port of the air compressor, and an air intake filter and a first flow meter sequentially arranged on the air intake pipe along the air intake direction. A first temperature sensor and a first pressure sensor are also arranged on the air intake pipe between the first flow meter and the air compressor. The exhaust path includes an exhaust pipe connected to the exhaust port of the air compressor, and a back pressure valve and a first gate valve sequentially arranged on the exhaust pipe along the exhaust direction, and a second temperature sensor and a second pressure sensor are also arranged on the exhaust pipe between the back pressure valve and the air compressor; The cooling water circuit system is connected to the cooling water inlet and cooling water outlet of the air compressor to provide cooling water to cool the air compressor; The control module is connected to the first temperature sensor, the first pressure sensor, the second temperature sensor, the second pressure sensor and the first flow meter to obtain the values ​​of each parameter; The control module is also connected to the back pressure valve to adjust the opening of the back pressure valve, thereby adjusting the exhaust pressure; The control module is also connected to the air compressor to adjust the rotation speed of the air compressor.

[0005] The cooling water circuit system includes a main waterway, a second waterway, a bypass waterway and a return waterway; The main water circuit includes a water tank, a water inlet pipe connected between the water tank and the cooling water inlet of the air compressor, a second gate valve, a water pump, a third gate valve, a water temperature three-way valve and a second flow meter arranged on the water inlet pipe in sequence along the water inlet direction, a third temperature sensor and a third pressure sensor are arranged on the water inlet pipe between the second flow meter and the air compressor, and an electric heater is arranged in the water tank; The second water circuit includes a side pipe and a dry cooler arranged on the side pipe, one end of the side pipe is connected to the water inlet pipe between the water pump and the third gate valve and the other end is connected to the water temperature three-way valve; The bypass waterway includes a bypass pipe and a water flow regulating valve arranged on the bypass pipe, one end of the bypass pipe is connected to the water inlet pipe between the water pump and the third gate valve and the other end is connected to the water tank; The return water circuit comprises a return pipe connected between the cooling water outlet of the air compressor and the water tank, and a fourth temperature sensor and a fourth pressure sensor are arranged on the return pipe.

[0006] The control module is connected to the third temperature sensor, the third pressure sensor, the fourth temperature sensor, the fourth pressure sensor and the second flow meter, and is used to monitor the cooling water temperature, the cooling water pressure and the cooling water flow; The control module is also connected to the water flow regulating valve, and is used to control the opening of the water flow regulating valve to adjust the cooling water flow; The control module is also connected to the water temperature three-way valve and the electric heater to adjust the cooling water temperature.

[0007] The first pressure sensor and the first temperature sensor are the suction pressure and suction temperature measurement points respectively, and the second pressure sensor and the second temperature sensor are the exhaust pressure and exhaust temperature measurement points respectively. The air enters the air compressor through the suction filter, and after being compressed by the twin-screw structure of the air compressor, it is first discharged into the exhaust pipe, and finally discharged into the atmosphere through the back pressure valve and the first gate valve. The first gate valve is manually set to a certain opening in advance to achieve the effect of coarse adjustment, so that the back pressure valve can complete the working condition in a relatively medium state with higher accuracy. The exhaust pressure is controlled by the back pressure valve. The action of the back pressure valve changes the flow area of ​​the exhaust pipe, thereby adjusting the size of the exhaust pressure. The opening of the back pressure valve is inversely proportional to the exhaust pressure. The size of the air flow is determined by the speed of the air compressor. By changing the speed of the air compressor, the suction flow is controlled.

[0008] The cooling water circuit system is mainly used to cool the air compressor. The exhaust temperature of the air compressor during operation is ≤140℃.

[0009] The above-mentioned air compressor test device for a new energy vehicle hydrogen fuel cell of the present invention adjusts the speed of the air compressor through a control module, and detects the flow of the air compressor at different speeds through a first flow meter, and detects the intake pressure and the exhaust pressure respectively through a first pressure sensor and a second sensor, thereby calculating important parameters such as the air compressor pressure ratio (ratio of exhaust pressure to intake pressure) .

[0010] The third temperature sensor and the third pressure sensor are the measuring points of the inlet water temperature and the inlet water pressure respectively, and the fourth temperature sensor and the fourth pressure sensor are the measuring points of the outlet water pressure and the outlet water temperature respectively. The water circuit of the test bench is mainly used for cooling the air compressor. In the main cooling water circuit, the cooling water from the water tank flows directly to the cooling water channel of the air compressor, and monitors the cooling water temperature, cooling water pressure drop and cooling water flow of the air compressor. The cooling water temperature is controlled by the dry cooler and the electric heater, and the cooling water flow is controlled by the opening of the water flow regulating valve of the bypass water circuit. The second gate valve and the third gate valve are pre-set to an opening so that the water flow can change smoothly.

[0011] When the cooling water temperature is higher than the set value xx℃, the dry cooler fan starts, and the water temperature regulating valve opening increases to allow more cooling water to dissipate heat through the dry cooler, reducing the cooling water temperature so that the cooling water temperature meets the set value. The cooling water temperature is inversely proportional to the water temperature regulating valve opening.

[0012] When the cooling water temperature is lower than the set value xx℃, the electric heating on the water tank starts and the cooling water temperature in the water tank rises to meet the setting.

[0013] In some embodiments, the first flowmeter is a vortex flowmeter, and the second flowmeter is an electromagnetic flowmeter. Both the vortex flowmeter and the electromagnetic flowmeter have digital pulse signal outputs, and are easy to be used in conjunction with the control module.

[0014] In some embodiments, a detection frame is fixedly installed on the frame, and the frame is provided with a lifting mechanism for lifting the air compressor into the detection frame, a pressing mechanism arranged above the detection frame for inserting the air intake connector from top to bottom into the air intake port of the air compressor, a lifting mechanism arranged below the detection frame for connecting the exhaust connector from bottom to top to the exhaust port of the air compressor, and a side pushing mechanism arranged next to the detection frame for driving the water inlet connector and the return connector to connect to the cooling water inlet and cooling water outlet of the air compressor from the side.

[0015] Compared with the test device of the above-mentioned embodiment, the main feature is the addition of an automatic docking mechanism for each pipeline. This can improve the automation of the test device, thereby improving the detection efficiency. When each joint is docked with the corresponding interface of the air compressor, it can be squeezed and sealed by a sealing ring. A hose can be added between the joint and the corresponding pipeline to facilitate the relative movement of the joint. For example, a section of flexible hose, such as a bellows, is provided between the air intake joint and the air intake pipe.

[0016] In some embodiments, the air compressor is positioned and placed on a positioning plate, and the lifting mechanism includes a lifting frame for placing the positioning plate and a vertical linear module fixedly mounted on the frame for driving the lifting frame to vertically lift and lower the frame. The frame is also provided with a lifting mechanism for lifting the positioning plate in the detection frame. In order to ensure the mutual positioning between the air compressor and the positioning plate, a positioning pin can be provided on the positioning plate to be plugged into the corresponding hole position on the air compressor, and a pin hole structure can also be provided between the positioning plate and the lifting frame for positioning. In order to facilitate the insertion of the exhaust joint into the air compressor, a corresponding through hole is provided at the bottom of the positioning plate.

[0017] In some embodiments, the lifting mechanism includes two symmetrically arranged lifting components, and the lifting components include a lifting cylinder slidably connected to the bottom of the detection frame and fixedly installed on the detection frame for driving the telescopic movement of the lifting plate. When the two lifting plates are extended, they are inserted into the bottom of the positioning plate from both sides.

[0018] The sliding connection between the lifting plate and the detection frame can be achieved through a slide rail slider assembly. The lifting mechanism is mainly used to support the positioning plate lifted into the detection frame, so that the positioning plate remains in the set position, which facilitates the lifting frame to reset downward.

[0019] In some embodiments, the pressing mechanism includes a pressing bracket fixedly mounted on the frame, a pressing plate fixedly connected to the air inlet connector, and a pressing cylinder fixedly mounted on the pressing bracket for driving the pressing plate to move up and down. The pressing plate is also provided with a plurality of elastic pressing blocks. When the pressing plate is lowered, the elastic pressing blocks first press the air compressor, and then the air inlet connector is inserted into the air inlet of the air compressor. The guiding of the pressing plate can be achieved through guide rods and guide sleeves. When the pressing plate is lowered, the elastic pressing blocks first press the air compressor to keep the air compressor fixed, avoid displacement of the air compressor, and facilitate subsequent joint docking.

[0020] In some embodiments, the elastic pressure block includes a top pressure head, a seat block fixedly arranged on the lower pressure plate, a column fixedly connected to the top pressure head and vertically movable relative to the seat block, a spring installed on the column and supporting the top pressure head and the seat block at both ends respectively, and a circular stopper fixedly arranged on the seat block for preventing the column from slipping out upward.

[0021] In some embodiments, the lifting mechanism includes a lifting bracket, a avoidance cylinder fixedly mounted on the frame for pushing the lifting bracket from the side to directly below the detection frame, a lifting plate fixedly mounted with the exhaust joint and movable up and down relative to the lifting bracket, and a lifting cylinder fixedly mounted on the lifting bracket for driving the lifting plate to move up and down. The avoidance cylinder is used to allow the lifting mechanism to avoid interference with the lifting mechanism.

[0022] In some embodiments, the side thrust mechanism includes a side mounting block for fixedly mounting a water inlet joint and a return joint, and a sliding cylinder fixedly mounted on a frame for driving the side mounting block to telescopically move. When the side mounting block is extended, the water inlet joint and the return joint are respectively plugged into the cooling water inlet and cooling water outlet of the air compressor.

[0023] It can be seen from the above technical solution that the present invention has at least the following advantages and positive effects: 1. The present invention provides an air compressor test device for a new energy vehicle hydrogen fuel cell. The speed of the air compressor is adjusted by a control module, and the flow rate of the air compressor at different speeds is detected by a first flow meter. The intake pressure and the exhaust pressure are detected by a first pressure sensor and a second pressure sensor respectively, so as to calculate important parameters such as the air compressor pressure ratio (ratio of exhaust pressure to intake pressure).

[0024] 2. The air compressor test device for a new energy vehicle hydrogen fuel cell of the present invention can realize automatic docking of pipelines, and has high automation and detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention; Figure 2 It is a structural schematic diagram of the air compressor of the present invention; Figure 3 It is a schematic diagram of the structure of the gas circuit system in the first embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the cooling water circuit system in the first embodiment of the present invention; Figure 5 The water and gas circuit diagrams in the first embodiment of the present invention; Figure 6 is a schematic structural diagram of a second embodiment of the present invention; Figure 7 It is a structural schematic diagram of a lifting mechanism in a second embodiment of the present invention; Figure 8 It is a structural schematic diagram of the lifting mechanism in the second embodiment of the present invention; Fig. 9 It is a structural schematic diagram of the pressing mechanism in the second embodiment of the present invention; Fig.10It is a schematic structural diagram of an elastic pressing block in a second embodiment of the present invention; Fig.11 It is a structural schematic diagram of the jacking mechanism in the second embodiment of the present invention; Fig.12 It is a structural schematic diagram of the side thrust mechanism in the second embodiment of the present invention.

[0026] Explanation of reference numerals: 1, rack; 11, detection frame; 2, air circuit system; 21, air intake circuit; 211, air intake pipe; 212, air intake filter; 213, first flow meter; 214, first temperature sensor; 215, first pressure sensor; 22, exhaust circuit; 221, exhaust pipe; 222, second temperature sensor; 223, second pressure sensor; 224, back pressure valve; 225, first gate valve; 3, cooling water circuit system; 31, main water 311, water tank; 312, water inlet pipe; 313, second gate valve; 314, water pump; 315, third gate valve; 316, water temperature three-way valve; 317, second flow meter; 318, third temperature sensor; 319, third pressure sensor; 310, electric heater; 32, second water circuit; 321, side pipe; 322, dry cooler; 33, bypass water circuit; 331, bypass pipe; 332, water flow regulating valve; 34, return water circuit; 3 41. Reflux pipe; 342. Fourth temperature sensor; 343. Fourth pressure sensor; 4. Lifting mechanism; 41. Lifting frame; 42. Vertical linear module; 5. Pressing mechanism; 51. Pressing bracket; 52. Pressing plate; 53. Pressing cylinder; 54. Elastic pressing block; 541. Pressing head; 542. Seat block; 543. Column; 544. Spring; 545. Round block; 55. Air inlet joint; 6. Lifting mechanism; 61. Lifting bracket; 62 , avoidance cylinder; 63, lifting plate; 64, lifting cylinder; 65, exhaust joint; 7, side thrust mechanism; 71, side mounting block; 72, slide cylinder; 73, water inlet joint; 74, return joint; 8, positioning plate; 81, through hole; 9, lifting mechanism; 91, lifting plate; 92, lifting cylinder; 93, slide rail slider assembly; 10, air compressor; 101, air inlet; 102, exhaust port; 103, cooling water inlet; 104, cooling water outlet. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The terms used in the embodiments of the present invention are only used to explain the specific embodiments of the present invention, and are not intended to limit the present invention.

[0028] See also Figure 2The structure of the air compressor for hydrogen fuel cells of new energy vehicles is shown in the figure, wherein the air inlet 101 of the air compressor 10 is on the upper surface, the air outlet is on the bottom surface, and the cooling water inlet 103 and the cooling water outlet 104 are located on the same side.

[0029] Based on this air compressor 10, refer to Figures 1 to 5 The embodiment of the present invention provides an air compressor test device for a new energy vehicle hydrogen fuel cell; comprising a frame 1, a control module, and an air circuit system 2 and a cooling water circuit system 3 arranged on the frame 1; The gas circuit system 2 includes an air intake path 21 and an air exhaust path 22; The air intake path 21 includes an air intake pipe 211 connected to the air intake port 101 of the air compressor 10, and an air intake filter 212 and a first flow meter 213 sequentially arranged on the air intake pipe 211 along the air intake direction. A first temperature sensor 214 and a first pressure sensor 215 are also arranged on the air intake pipe 211 between the first flow meter 213 and the air compressor 10. The exhaust path 22 includes an exhaust pipe 221 connected to the exhaust port 102 of the air compressor 10, and a back pressure valve 224 and a first gate valve 225 sequentially arranged on the exhaust pipe 221 along the exhaust direction. A second temperature sensor 222 and a second pressure sensor 223 are also arranged on the exhaust pipe 221 between the back pressure valve 224 and the air compressor 10. The frame 1 includes an upper frame and a lower frame. The air compressor 10 is fixedly installed on the upper frame. The air circuit system 2 includes an air inlet 21 which is also installed on the upper frame and connected to the upward air inlet 101. The air outlet 22 is located on the lower frame and connected to the downward air inlet 101. The cooling water circuit system 3 is installed on the lower frame. The cooling water circuit system 3 is connected to the cooling water inlet 103 and the cooling water outlet 104 of the air compressor 10, and is used to provide cooling water to cool the air compressor 10; The control module is connected to the first temperature sensor 214, the first pressure sensor 215, the second temperature sensor 222, the second pressure sensor 223 and the first flow meter 213 to obtain the values ​​of each parameter; The control module is also connected to the back pressure valve 224 to adjust the opening of the back pressure valve 224, thereby adjusting the exhaust pressure; The control module is also connected to the air compressor 10 for adjusting the rotation speed of the air compressor 10 .

[0030] The first pressure sensor 215 and the first temperature sensor 214 are respectively the suction pressure and suction temperature measuring points, and the second pressure sensor 223 and the second temperature sensor 222 are respectively the exhaust pressure and exhaust temperature measuring points. The air enters the air compressor 10 through the suction filter 212, and after being compressed by the twin screw structure of the air compressor 10, it is first discharged into the exhaust pipe 221, and finally discharged to the atmosphere through the back pressure valve 224 and the first gate valve 225. The first gate valve 225 is manually set to a certain opening in advance to achieve the effect of rough adjustment, so that the back pressure valve 224 can complete the working condition in a relatively medium state with high accuracy. The exhaust pressure is controlled by the back pressure valve 224. The back pressure valve 224 changes the flow area of ​​the exhaust pipe 221 to adjust the size of the exhaust pressure. The opening of the back pressure valve 224 is inversely proportional to the exhaust pressure. The size of the air flow is determined by the speed of the air compressor 10. By changing the speed of the air compressor 10, the suction flow is controlled.

[0031] The cooling water circuit system 3 is mainly used for cooling the air compressor 10. The exhaust temperature of the air compressor 10 is ≤140°C during operation.

[0032] The air compressor test device for new energy vehicle hydrogen fuel cell adjusts the speed of the air compressor 10 through the control module, and detects the flow of the air compressor 10 at different speeds through the first flow meter 213, and detects the intake pressure and exhaust pressure respectively through the first pressure sensor 215 and the second sensor, so as to calculate important parameters such as the air compressor pressure ratio (ratio of exhaust pressure to intake pressure).

[0033] The cooling water circuit system 3 includes a main water channel 31, a second water channel 32, a bypass water channel 33 and a return water channel 34; The main water circuit 31 includes a water tank 311, a water inlet pipe 312 connected between the water tank 311 and the cooling water inlet 103 of the air compressor 10, a second gate valve 313, a water pump 314, a third gate valve 315, a water temperature three-way valve 316 and a second flow meter 317 which are sequentially arranged on the water inlet pipe 312 along the water inlet direction, a third temperature sensor 318 and a third pressure sensor 319 are arranged on the water inlet pipe 312 between the second flow meter 317 and the air compressor 10, and an electric heater 310 is arranged in the water tank 311; The second water circuit 32 includes a side pipe 321 and a dry cooler 322 disposed on the side pipe 321. One end of the side pipe 321 is connected to the water inlet pipe 312 between the water pump 314 and the third gate valve 315, and the other end is connected to the water temperature three-way valve 316. The bypass waterway 33 includes a bypass pipe 331 and a water flow regulating valve 332 disposed on the bypass pipe 331. One end of the bypass pipe 331 is connected to the water inlet pipe 312 between the water pump 314 and the third gate valve 315, and the other end is connected to the water tank 311. The return water circuit 34 includes a return pipe 341 connected between the cooling water outlet 104 of the air compressor 10 and the water tank 311 , and a fourth temperature sensor 342 and a fourth pressure sensor 343 are provided on the return pipe 341 .

[0034] The control module is connected to the third temperature sensor 318, the third pressure sensor 319, the fourth temperature sensor 342, the fourth pressure sensor 343 and the second flow meter 317 to monitor the cooling water temperature, cooling water pressure and cooling water flow; The control module is also connected to the water flow regulating valve 332, and is used to control the opening of the water flow regulating valve 332 to adjust the cooling water flow; The control module is also connected to the water temperature three-way valve 316 and the electric heater 310 for adjusting the cooling water temperature.

[0035] The third temperature sensor 318 and the third pressure sensor 319 are respectively the measuring points of the inlet water temperature and the inlet water pressure, the fourth temperature sensor 342 and the fourth pressure sensor 343 are respectively the measuring points of the outlet water pressure and the outlet water temperature, the water circuit of the test bench is mainly used for cooling the air compressor 10, in the cooling water main circuit, the cooling water from the water tank 311 flows directly to the cooling water channel of the air compressor 10, and monitors the cooling water temperature, cooling water pressure drop and cooling water flow of the air compressor 10. The cooling water temperature is controlled by the dry cooler 322 and the electric heater, the cooling water flow is controlled by the opening of the water flow regulating valve 332 of the bypass water circuit 33, and the second gate valve 313 and the third gate valve 315 are pre-set to an opening so that the water flow can change smoothly.

[0036] When the cooling water temperature is higher than the set value xx℃, the fan of the dry cooler 322 starts, and the opening of the water temperature regulating valve increases so that more cooling water can dissipate heat through the dry cooler 322, and the cooling water temperature decreases so that the cooling water temperature meets the set value. The cooling water temperature is inversely proportional to the opening of the water temperature regulating valve.

[0037] When the cooling water temperature is lower than the set value xx°C, the electric heating on the water tank 311 is started, and the cooling water temperature in the water tank 311 rises to meet the setting.

[0038] The first flowmeter 213 is a vortex flowmeter, and the second flowmeter 317 is an electromagnetic flowmeter. Both the vortex flowmeter and the electromagnetic flowmeter have digital pulse signal outputs, and are easy to be used in conjunction with the control module.

[0039] The test device may also be provided with a rotation speed sensor, a noise sensor and a vibration sensor as required.

[0040] The following table shows a specific test parameter of this embodiment.

[0041] Test results of air compressor for hydrogen fuel cell

[0042] Note: 1.The symbol “ / ” in the table indicates that there is no content in that item.

[0043] 2. Test conditions: 2.1. Inhalation temperature: 24.8℃; 2.2. Water inlet temperature: 31.9℃; 2.3. Exhaust pressure: 2.41 bar (0.241 MPa); 2.4. Exhaust temperature: 122.6℃; 2.5. Suction pressure: 0.95 Bar (0.095 MPa); 2.6. Speed: 20000 r / min 2.7. Cooling water flow rate: 9.9L / h.

[0044] See also Figures 6 to 12 Another embodiment of the present invention is shown, and the main improvement of this embodiment is that: a detection frame 11 is fixedly arranged on the frame 1, and a lifting mechanism 4 for lifting the air compressor 10 into the detection frame 11 is arranged on the frame 1, a pressing mechanism 5 arranged above the detection frame 11 for inserting the air intake joint 55 from top to bottom into the air intake port 101 of the air compressor 10, a lifting mechanism 6 arranged below the detection frame 11 for docking the exhaust joint 65 from bottom to top to the exhaust port 102 of the air compressor 10, and a side thrust mechanism 7 arranged beside the detection frame 11 for driving the water intake joint 73 and the return joint 74 to dock from the side to the cooling water inlet 103 and the cooling water outlet 104 of the air compressor 10, respectively. The air intake joint 55 is connected to the air intake pipe 211, the exhaust joint 65 is connected to the exhaust pipe 221, the water intake joint 73 is connected to the water intake pipe 312, and the return joint 74 is connected to the return pipe.

[0045] Compared with the test device of the above-mentioned embodiment, the automatic docking mechanism of each pipeline is mainly added. This can improve the automation degree of the test device, thereby improving the detection efficiency. When each joint is docked with the corresponding interface of the air compressor 10, it can be squeezed and sealed by a sealing ring. A hose can be added between the joint and the corresponding pipeline to facilitate the relative movement of the joint. For example, a section of flexible hose, such as a bellows, is provided between the air intake joint 55 and the air intake pipe 211.

[0046] The air compressor 10 is positioned and placed on the positioning plate 8. The lifting mechanism 4 includes a lifting frame 41 for placing the positioning plate 8 and a vertical linear module 42 fixedly mounted on the frame 1 for driving the lifting frame 41 to move vertically up and down. The frame 1 is also provided with a lifting mechanism 9 for lifting the positioning plate 8 in the detection frame 11. In order to ensure the mutual positioning between the air compressor 10 and the positioning plate 8, a positioning pin can be provided on the positioning plate 8 to be plugged into the corresponding hole position on the air compressor 10, and a pin hole structure can also be provided between the positioning plate 8 and the lifting frame 41 for positioning. In order to facilitate the insertion of the exhaust joint 65 into the air compressor 10, a corresponding through hole 81 is provided at the bottom of the positioning plate 8.

[0047] The lifting mechanism 9 includes two symmetrically arranged lifting components, which include a lifting cylinder 92 slidably connected to the bottom of the detection frame 11 and fixedly installed on the detection frame 11 for driving the lifting plate 91 to extend and retract. When the two lifting plates 91 are extended, they are inserted into the bottom of the positioning plate 8 from both sides.

[0048] The sliding connection between the lifting plate 91 and the detection frame 11 can be achieved through a slide rail slider assembly 93. The lifting mechanism 9 is mainly used to support the positioning plate 8 lifted into the detection frame 11, so that the positioning plate 8 remains in the set position, making it convenient for the lifting frame 41 to reset downward.

[0049] The pressing mechanism 5 includes a pressing bracket 51 fixedly mounted on the frame 1, a pressing plate 52 fixedly connected to the air inlet connector 55, and a pressing cylinder 53 fixedly mounted on the pressing bracket 51 for driving the pressing plate 52 to move up and down. The pressing plate 52 is also provided with a plurality of elastic pressing blocks 54. When the pressing plate 52 is lowered, the elastic pressing blocks 54 first press the air compressor 10, and then the air inlet connector 55 is inserted into the air inlet 101 of the air compressor 10. The guiding of the pressing plate 52 can be achieved by a guide rod and a guide sleeve. When the pressing plate 52 is lowered, the elastic pressing blocks 54 first press the air compressor 10 to keep the air compressor 10 fixed, avoid the air compressor 10 from deflecting, and facilitate the subsequent joint docking.

[0050] The elastic pressure block 54 includes a top pressure head 541, a seat block 542 fixedly arranged on the lower pressure plate 52, a column 543 fixedly connected to the top pressure head 541 and vertically movable relative to the seat block 542, a spring 544 installed on the column 543 and with its two ends respectively supporting the top pressure head 541 and the seat block 542, and a circular stopper 545 fixedly arranged on the seat block 542 for preventing the column 543 from slipping out upward.

[0051] The lifting mechanism 6 includes a lifting bracket 61, a circumvention cylinder 62 fixedly mounted on the frame 1 for pushing the lifting bracket 61 from the side to the bottom of the detection frame, a lifting plate 63 fixedly mounted with an exhaust joint 65 and movable up and down relative to the lifting bracket 61, and a lifting cylinder 64 fixedly mounted on the lifting bracket 61 for driving the lifting plate 63 to move up and down. The circumvention cylinder 62 is used to allow the lifting mechanism 6 to circumvent the lifting mechanism 4 to avoid interference.

[0052] The side thrust mechanism 7 includes a side mounting block 71 for fixing a water inlet joint 73 and a return joint 74, and a slide cylinder 72 fixedly mounted on the frame 1 for driving the side mounting block 71 to extend and retract. When the side mounting block 71 is extended, the water inlet joint 73 and the return joint 74 are respectively plugged into the cooling water inlet 103 and the cooling water outlet 104 of the air compressor 10.

[0053] The following briefly describes the working process and usage of the test device in the above embodiment: The air compressor 10 and the positioning plate 8 are transferred from the side to the lifting frame 41 by a manipulator or other transport mechanism. The positioning plate 8 is positioned with the lifting frame 41. The vertical linear module 42 drives the lifting frame 41 to move upward and stop in the detection frame 11 of the frame 1. The two lifting plates 91 of the lifting mechanism 9 are extended from the left and right sides under the drive of the lifting cylinder 92 to lift the bottom of the positioning plate 8, and the lifting frame 41 is lowered and reset. The lower pressing plate 52 of the pressing mechanism 5 moves downward under the drive of the pressing cylinder 53, and the elastic pressing block 54 presses the air compressor 10 downward, and then the air intake connector 55 is inserted into the air intake port 101 of the air compressor 10. The avoidance cylinder 62 of the lifting mechanism 6 extends out, driving the exhaust connector 65 to move to the bottom of the air compressor 10, and the lifting cylinder 64 drives the lifting plate 63 to rise, and inserts the exhaust connector 65 into the exhaust port 102 of the air compressor 10. The slide cylinder 72 of the side thrust mechanism 7 drives the side mounting block 71 to extend, and the water inlet joint 73 and the return joint 74 are respectively inserted into the cooling water inlet 103 and the cooling water outlet 104, thus completing the connection of the pipelines. The air compressor 10 is started, and the corresponding parameters are tested. After the test is completed, each mechanism is reset, and the lifting mechanism moves the air compressor 10 downward.

[0054] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be 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.

[0055] The terms "first," "second," "third," "fourth," etc., if any, are used to distinguish between similar objects and not necessarily to describe a particular order or precedence.

[0056] In the description of the embodiments of the present invention, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, rather than to limit them. Although the embodiments of the present invention have been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air compressor test device for new energy vehicle hydrogen fuel cells, characterized in that: It comprises a rack (1), a control module, and an air circuit system (2) and a cooling water circuit system (3) arranged on the rack (1); The gas circuit system (2) comprises an air intake path (21) and an air exhaust path (22); The air intake path (21) comprises an air intake pipe (211) connected to an air intake port (101) of an air compressor (10), and an air intake filter (212) and a first flow meter (213) arranged on the air intake pipe (211) in sequence along an air intake direction; a first temperature sensor (214) and a first pressure sensor (215) are also arranged on the air intake pipe (211) between the first flow meter (213) and the air compressor (10); The exhaust path (22) comprises an exhaust pipe (221) connected to an exhaust port (102) of an air compressor (10), and a back pressure valve (224) and a first gate valve (225) arranged in sequence on the exhaust pipe (221) along an exhaust direction; a second temperature sensor (222) and a second pressure sensor (223) are also arranged on the exhaust pipe (221) between the back pressure valve (224) and the air compressor (10); The cooling water circuit system (3) is connected to the cooling water inlet (103) and the cooling water outlet (104) of the air compressor (10) and is used to provide cooling water to cool the air compressor (10); The control module is connected to the first temperature sensor (214), the first pressure sensor (215), the second temperature sensor (222), the second pressure sensor (223) and the first flow meter (213) to obtain various parameter values; The control module is also connected to the back pressure valve (224) and is used to adjust the opening of the back pressure valve (224), thereby adjusting the exhaust pressure; The control module is also connected to the air compressor (10) and is used to control the rotation speed of the air compressor (10); The cooling water circuit system (3) comprises a main water path (31), a second water path (32), a bypass water path (33) and a return water path (34); The main water path (31) comprises a water tank (311), a water inlet pipe (312) connected between the water tank (311) and a cooling water inlet (103) of an air compressor (10), a second gate valve (313), a water pump (314), a third gate valve (315), a water temperature three-way valve (316) and a second flow meter (317) arranged in sequence on the water inlet pipe (312) along the water inlet direction, a third temperature sensor (318) and a third pressure sensor (319) being arranged on the water inlet pipe (312) between the second flow meter (317) and the air compressor (10), and an electric heater (310) being arranged in the water tank (311); The second water circuit (32) comprises a side pipe (321) and a dry cooler (322) arranged on the side pipe (321); one end of the side pipe (321) is connected to the water inlet pipe (312) between the water pump (314) and the third gate valve (315), and the other end is connected to the water temperature three-way valve (316); The bypass water path (33) comprises a bypass pipe (331) and a water flow regulating valve (332) arranged on the bypass pipe (331); one end of the bypass pipe (331) is connected to the water inlet pipe (312) between the water pump (314) and the third gate valve (315), and the other end is connected to the water tank (311); The return water circuit (34) comprises a return pipe (341) connected between the cooling water outlet (104) of the air compressor (10) and the water tank (311), and a fourth temperature sensor (342) and a fourth pressure sensor (343) are provided on the return pipe (341); The control module is connected to the third temperature sensor (318), the third pressure sensor (319), the fourth temperature sensor (342), the fourth pressure sensor (343) and the second flow meter (317), and is used to monitor the cooling water temperature, cooling water pressure and cooling water flow; The control module is also connected to the water flow regulating valve (332) and is used to control the opening of the water flow regulating valve (332) so as to adjust the cooling water flow; The control module is also connected to the water temperature three-way valve (316) and the electric heater (310) for adjusting the cooling water temperature.

2. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 1 is characterized in that: The first flow meter (213) is a vortex flow meter, and the second flow meter (317) is an electromagnetic flow meter.

3. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 1 is characterized in that: A detection frame (11) is fixedly arranged on the frame (1), and the frame (1) is provided with a lifting mechanism (4) for lifting the air compressor (10) into the detection frame (11), a pressing mechanism (5) arranged above the detection frame (11) for inserting the air intake connector (55) from top to bottom into the air intake port (101) of the air compressor (10), a lifting mechanism (6) arranged below the detection frame (11) for docking the exhaust connector (65) from bottom to top to the exhaust port (102) of the air compressor (10), and a side thrust mechanism (7) arranged beside the detection frame (11) for driving the water intake connector (73) and the return connector (74) to dock from the side to the cooling water inlet (103) and the cooling water outlet (104) of the air compressor (10), respectively.

4. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 3 is characterized in that: The air compressor (10) is positioned and placed on the positioning plate (8); the lifting mechanism (4) comprises a lifting frame (41) for placing the positioning plate (8) and a vertical linear module (42) fixedly mounted on the frame (1) for driving the lifting frame (41) to move vertically up and down; the frame (1) is also provided with a lifting mechanism (9) for lifting the positioning plate (8) in the detection frame (11).

5. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 4 is characterized in that: The lifting mechanism (9) comprises two symmetrically arranged lifting components, the lifting components comprising a lifting plate (91) slidably connected to the bottom of the detection frame (11) and a lifting cylinder (92) fixedly mounted on the detection frame (11) for driving the lifting plate (91) to move in a telescopic manner. When the two lifting plates (91) are extended, they are inserted into the bottom of the positioning plate (8) from both sides.

6. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 5, characterized in that: The pressing mechanism (5) comprises a pressing bracket (51) fixedly mounted on the frame (1), a pressing plate (52) fixedly connected to an air inlet connector (55), and a pressing cylinder (53) fixedly mounted on the pressing bracket (51) for driving the pressing plate (52) to move up and down. The pressing plate (52) is also provided with a plurality of elastic pressing blocks (54). When the pressing plate (52) is lowered, the elastic pressing blocks (54) first press the air compressor (10), and then the air inlet connector (55) is inserted into the air inlet (101) of the air compressor (10).

7. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 6 is characterized in that: The elastic pressure block (54) comprises a top pressure head (541), a seat block (542) fixedly arranged on the lower pressure plate (52), a column (543) fixedly connected to the top pressure head (541) and vertically movable relative to the seat block (542), a spring (544) installed on the column (543) and with its two ends respectively supporting the top pressure head (541) and the seat block (542), and a circular stopper (545) fixedly arranged on the seat block (542) for preventing the column (543) from falling out upwards.

8. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 3 is characterized in that: The lifting mechanism (6) comprises a lifting bracket (61), an avoidance cylinder (62) fixedly mounted on the frame (1) and used for pushing the lifting bracket (61) from the side to directly below the detection frame, a lifting plate (63) fixedly mounted with an exhaust joint (65) and movable up and down relative to the lifting bracket (61), and a lifting cylinder (64) fixedly mounted on the lifting bracket (61) and used for driving the lifting plate (63) to move up and down.

9. The air compressor test device for new energy vehicle hydrogen fuel cell according to claim 3, characterized in that: The side thrust mechanism (7) comprises a side mounting block (71) for fixedly mounting a water inlet joint (73) and a return joint (74), and a slide cylinder (72) fixedly mounted on the frame (1) for driving the side mounting block (71) to telescopically move. When the side mounting block (71) is extended, the water inlet joint (73) and the return joint (74) are respectively plugged into a cooling water inlet (103) and a cooling water outlet (104) of the air compressor (10).

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