A compressor valve plate performance testing device

Abstract

This invention discloses a compressor valve plate performance testing device, relating to the field of compressor valve plate testing technology. It includes a workbench assembly, with an upper testing unit disposed on the top inner side of the workbench assembly. A lifting unit extending inwards from the top of the workbench assembly is disposed on the bottom inner side of the lifting unit, and a testing component is rotatably disposed therein. A shifting unit, capable of rotating the testing component, is driven to its left side. A test piece is placed on top of the testing component. The upper testing unit includes an upper valve seat. This invention forms two independent detection paths through the upper testing unit and the testing component, thereby enabling simultaneous testing of the sealing performance of the intake and exhaust valve plates, effectively improving testing efficiency. Furthermore, it effectively simplifies testing steps, reduces testing costs, and further improves testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of compressor valve plate testing technology, and in particular to a compressor valve plate performance testing device. Background Technology

[0002] Compressor valves are the core one-way valves of compressors, divided into intake valves and exhaust valves. They are thin, elastic metal sheets, usually made of 65Mn spring steel or stainless steel. During operation, they automatically open and close by relying on the pressure difference between the inside and outside of the cylinder to control the one-way flow of gas and complete the intake, compression and exhaust cycles. Because they need to withstand high-frequency impacts, they require high fatigue strength and sealing performance.

[0003] As disclosed in the invention patent CN112697358A, when the prior art tests the sealing performance of two valve plates of a compressor, due to the limitations of the valve seat structure, it usually tests one of the two valve plates first, and then tests the remaining valve plate after the former has been tested. The testing efficiency is relatively low. In addition, before the test begins, the two valve seats need to be evacuated, and during the test, the gas pipeline needs to be adjusted. The testing steps are relatively cumbersome, which not only increases the testing cost, but also further reduces the testing efficiency.

[0004] Therefore, it is necessary to invent a compressor valve plate performance testing device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a compressor valve plate performance testing device. By forming two independent detection paths through the upper testing unit and testing components, the sealing performance of the intake and exhaust valve plates can be tested simultaneously, effectively improving testing efficiency. Furthermore, it simplifies the testing steps, reduces testing costs, and further improves testing efficiency. This addresses the problem mentioned in the background art where, due to valve seat structure limitations, the existing technology for testing the sealing performance of two compressor valve plates mostly tests one valve plate first, and then tests the remaining valve plate after the former is completed. This results in relatively low testing efficiency. Additionally, before testing, both valve seats need to be evacuated, and during testing, the gas pipeline needs to be adjusted, making the testing steps relatively cumbersome, increasing testing costs, and further reducing testing efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a compressor valve plate performance testing device, comprising a workbench assembly, an upper testing unit provided on the top inner side of the workbench assembly, a lifting unit extending to the inner side of the top of the workbench assembly, a testing component rotatably provided on the bottom inner side of the lifting unit, a shifting unit that can drive the testing component to rotate on the left side of the testing component, and a test piece placed on the top of the testing component. The upper test unit includes an upper valve seat. The bottom center of the upper valve seat has an annular inner groove A and an annular outer groove A in concentric circles from the inside to the outside. A pressure gauge A is fixedly installed through the right side of the upper valve seat and is connected to the annular inner groove A. An air inlet pipe A is fixedly installed through the left side of the upper valve seat and is connected to the annular outer groove A. A vacuum pump A is fixedly connected to the output end of the air inlet pipe A. The test assembly includes an intermediate plate, with lower test units provided at both the top and bottom of the intermediate plate. Each set of lower test units includes a lower valve seat fixedly connected to the intermediate plate. A positioning groove is provided on the side of the lower valve seat away from the intermediate plate. An annular inner groove B and an annular outer groove B are concentrically formed from the center of the inner side of the positioning groove. A pressure gauge B connected to the annular outer groove B and an air inlet pipe B connected to the annular inner groove B are fixedly installed through the side of the lower valve seat. A hollow shaft fixedly installed on the side of the intermediate plate is fixedly connected to the output end of the air inlet pipe B. A connecting pipe is connected to the output end of the hollow shaft through a rotary joint. A vacuum pump B is fixedly connected to the output end of the connecting pipe. The vacuum pump B, connecting pipe, hollow shaft, air inlet pipe B, annular inner groove B, annular inner groove A and pressure gauge A form a first detection path, and the vacuum pump A, air inlet pipe A, annular outer groove A, annular outer groove B and pressure gauge B form a second detection path.

[0007] Preferably, the workbench assembly includes a workbench, and a top frame is fixedly installed on both sides of the top of the workbench. Both sides of the top frame are provided with clearance grooves, and a cushioning pad is placed at the center of the top of the workbench.

[0008] Preferably, each of the four corners of the top of the upper valve seat is fixedly provided with a fixing rod, and the four fixing rods are fixedly provided on the top inner side of the top frame, and the vacuum pump A is fixedly provided on the middle left side of the top frame.

[0009] Preferably, the lifting unit includes a hydraulic cylinder fixedly mounted on the top of the top frame, the output shaft of the hydraulic cylinder extending to the inner side of the top frame and fixedly connected to a lifting frame, and guide shafts that slide vertically through the top of the hydraulic cylinder on both sides.

[0010] Preferably, the lifting frame is rotatably sleeved on the outside of the two hollow shafts via ball bearings, and a fixed magnet is fixedly nested on the right side of the lifting frame. The lifting unit also includes a movable disk fixedly sleeved on the outside of the adjacent hollow shafts, and two moving magnets are fixedly nested on the side of the movable disk, with any one of the moving magnets magnetically attracted and fixed to the fixed magnet.

[0011] Preferably, the shifting unit includes a support base fixedly installed on the top left side of the workbench, a guide column fixedly installed on the top rear side of the support base, and a counterweight beam slidably sleeved on the outer side of the guide column in the vertical direction via a linear bearing.

[0012] Preferably, the counterweight beam is fixedly provided with a lower limiting plate, a rack and an upper limiting plate from bottom to top on its front side, and the rack has a gear meshing on its front side, which is sleeved on the outside of the adjacent hollow shaft through a one-way bearing and blocked from below by the lower limiting plate.

[0013] Preferably, the test piece includes a cylinder head located inside an adjacent positioning groove, and the top of the cylinder head has a plurality of outer and inner channels evenly distributed in a ring from the inside to the outside.

[0014] Preferably, an intake valve plate that blocks multiple external channels is fixedly installed on the top of the cylinder head, and an exhaust valve plate that blocks multiple internal channels is fixedly installed on the bottom of the cylinder head. Multiple clearance channels are evenly opened on the top of the exhaust valve plate.

[0015] The technical effects and advantages of this invention are as follows:

[0016] This invention sets up an upper test unit and a test component to form two independent detection paths, thereby enabling simultaneous testing of the sealing performance of the intake valve plate and the exhaust valve plate, effectively improving testing efficiency. In addition, it effectively simplifies the testing steps, reduces testing costs, and further improves testing efficiency.

[0017] This invention incorporates a switching unit, which allows the test component to rotate as it descends and resets after testing, causing the test piece to actively fall out. Simultaneously, as the test piece falls out, the tester can place the next test piece into the lower test unit above for positioning, thus achieving synchronous loading and unloading operations. This further shortens the interval between two adjacent test processes and improves testing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the workbench assembly structure of the present invention; Figure 3This is a schematic diagram of the upper test unit structure of the present invention; Figure 4 This is a schematic diagram of the lifting unit structure of the present invention; Figure 5 This is a schematic diagram of the test component structure of the present invention; Figure 6 This is a schematic diagram of the transposition unit structure of the present invention; Figure 7 This is a schematic diagram of the test piece structure of the present invention.

[0019] In the diagram: 1. Workbench assembly; 11. Workbench; 12. Top frame; 13. Clearance groove; 14. Buffer pad; 2. Upper test unit; 21. Upper valve seat; 22. Annular inner groove A; 23. Annular outer groove A; 24. Pressure gauge A; 25. Inlet pipe A; 26. Vacuum pump A; 27. Fixed rod; 3. Lifting unit; 31. Hydraulic cylinder; 32. Lifting frame; 33. Guide shaft; 34. Fixed magnet; 35. Movable plate; 36. Moving magnet; 4. Test assembly; 41. Intermediate plate; 42. Lower valve seat; 43. Positioning groove; 44. Inner annular groove B; 45. Outer annular groove B; 46. Pressure gauge B; 47. Intake pipe B; 48. Hollow shaft; 49. Connecting pipe; 410. Vacuum pump B; 5. Switching unit; 51. Support base; 52. Guide column; 53. Counterweight beam; 54. Lower limit plate; 55. Rack; 56. Upper limit plate; 57. Gear; 6. Test piece; 61. Cylinder head; 62. Inner channel; 63. Outer channel; 64. Intake valve plate; 65. Exhaust valve plate; 66. Clearance channel. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides, for example Figures 1-7 The compressor valve plate performance testing device shown includes a workbench assembly 1, an upper testing unit 2 is provided on the top inner side of the workbench assembly 1, a lifting unit 3 extending to the inner side of the top of the workbench assembly 1, a testing component 4 is rotatably provided on the bottom inner side of the lifting unit 3, a shifting unit 5 that can drive the testing component 4 to rotate is provided on the left side of the testing component 4, and a test piece 6 is placed on the top of the testing component 4.

[0022] like Figure 2As shown, the workbench assembly 1 includes a workbench 11 made of Q235A carbon steel, which is high in strength, has stable load-bearing capacity, and is not easily deformed. A top frame 12 is fixedly installed on both sides of the top of the workbench 11. Both sides of the top frame 12 are provided with clearance grooves 13. A cushioning pad 14 is placed in the center of the top of the workbench 11. The pad is made of polyurethane (PU) elastomer, which is highly elastic, wear-resistant, and anti-aging, protecting the test piece 6 from impact and scratches when it falls.

[0023] By setting the above structure, when the test component 4 actively outputs the test piece 6 after testing by flipping, the buffer pad 14 can support the test piece 6 after testing, so as to avoid damage to the test piece 6.

[0024] like Figure 4 As shown, the lifting unit 3 includes a hydraulic cylinder 31 fixedly mounted on the top of the top frame 12. The output shaft of the hydraulic cylinder 31 extends to the inside of the top frame 12 and is fixedly connected to a lifting frame 32. The lifting frame 32 is made of Q355 low alloy high strength steel, which has strong load-bearing capacity, does not deform, and slides smoothly with linear bearings. Guide shafts 33 are fixedly mounted on both sides of the top of the hydraulic cylinder 31, which slide vertically through the top frame 12 via linear bearings. The lifting frame 32 is rotatably sleeved on the outside of two hollow shafts 48 via ball bearings. A fixed magnet 34 is fixedly nested on the right side of the lifting frame 32. The lifting unit 3 also includes a movable disk 35 fixedly sleeved on the outside of adjacent hollow shafts 48. Two moving magnets 36 are fixedly nested on the side of the movable disk 35. Both the fixed magnet 34 and the moving magnet 36 are neodymium iron boron high strength magnets, and both are wrapped with stainless steel sheaths. They have strong magnetic attraction, accurate positioning, and are not easy to demagnetize. Any one of the moving magnets 36 is magnetically attracted and fixed to the fixed magnet 34.

[0025] By setting the above structure, the lifting frame 32, guided by the guide shaft 33, can be raised and lowered by the hydraulic cylinder 31. In turn, the lifting frame 32 can drive the two lower valve seats 42 to rise and fall through the intermediate plate 41. In addition, when the right hollow shaft 48 drives the movable disk 35 to rotate synchronously, the movable disk 35 drives the two moving magnets 36 to rotate synchronously. At this time, the moving magnet 36, which was originally magnetically attracted to the fixed magnet 34, separates from the fixed magnet 34. After the two lower valve seats 42 are switched, the other moving magnet 36 is magnetically attracted and fixed to the fixed magnet 34, thereby preventing the two hollow shafts 48 from driving the intermediate plate 41 to rotate arbitrarily inside the lifting frame 32.

[0026] like Figure 3As shown, the upper test unit 2 includes an upper valve seat 21. The bottom center of the upper valve seat 21 has an annular inner groove A22 and an annular outer groove A23 arranged in concentric circles from the inside to the outside. A pressure gauge A24, which is connected to the annular inner groove A22, is fixedly installed through the right side of the upper valve seat 21. An air inlet pipe A25, which is connected to the annular outer groove A23, is fixedly installed through the left side of the upper valve seat 21. A vacuum pump A26 is fixedly connected to the output end of the air inlet pipe A25. Fixing rods 27 are fixedly installed at the four corners of the top of the upper valve seat 21. The four fixing rods 27 are fixedly installed on the top inner side of the top frame 12. The vacuum pump A26 is fixedly installed in the middle of the left side of the top frame 12.

[0027] like Figure 5 As shown, the test assembly 4 includes an aluminum alloy intermediate plate 41. Lower test units are provided at both the top and bottom of the intermediate plate 41. Each lower test unit includes a lower valve seat 42 fixedly connected to the intermediate plate 41. A positioning groove 43 is provided on the side of the lower valve seat 42 away from the intermediate plate 41. An annular inner groove B44 and an annular outer groove B45 are concentrically formed from the center of the inner side of the positioning groove 43 outwards. A sealing coating is provided on the inner sides of the annular inner groove A22, the annular outer groove A23, the positioning groove 43, the annular inner groove B44, and the annular outer groove B45 to ensure a seal with the test piece 6 during testing. A sealing coating is fixedly provided through the side of the lower valve seat 42 and is connected to the annular outer groove B45. The pressure gauge B46 is connected to the groove B45 and the air inlet pipe B47 is connected to the inner annular groove B44. The output end of the air inlet pipe B47 is fixedly connected to a hollow shaft 48 fixedly installed on the side of the intermediate plate 41. The output end of the hollow shaft 48 is connected to a connecting pipe 49 through a rotary joint. The output end of the connecting pipe 49 is fixedly connected to a vacuum pump B410. The vacuum pump B410, connecting pipe 49, hollow shaft 48, air inlet pipe B47, inner annular groove B44, inner annular groove A22 and pressure gauge A24 form a first detection path. The vacuum pump A26, air inlet pipe A25, outer annular groove A23, outer annular groove B45 and pressure gauge B46 form a second detection path.

[0028] By setting up the upper test unit 2 and test component 4, the test piece 6 can be positioned using the positioning groove 43 on the top of the lower valve seat 42 during actual testing. This allows the lifting frame 32 to lift the intermediate plate 41 via the two hollow shafts 48. As the intermediate plate 41 rises, it simultaneously lifts the lower valve seat 42 with the test piece 6 on its top and the lower valve seat 42 without the test piece 6 on its bottom, until the upper lower valve seat 42 is in contact with the bottom of the upper valve seat 21. At this point, the top of the cylinder head 61 is tightly fitted with the bottom opening of the annular inner groove A22 and the annular outer groove A23. The readings of the pressure gauge A24 and the right-side pressure gauge B46 are recorded. Simultaneously, vacuum pump A26 and right-side vacuum pump B410 are started. At this time, vacuum pump A26 evacuates the interior of the annular outer groove A23 through the inlet pipe A25, and vacuum pump B410 evacuates the interior of the annular inner groove B44 through the connecting pipe 49, hollow shaft 48 and inlet pipe B47. During the evacuation process, the readings of pressure gauges A24 and B46 are checked. If the reading of pressure gauge A24 decreases during this process, the sealing performance of the inlet valve plate 64 to the external channel 63 is unqualified. If the reading of the right-side vacuum pump B410 decreases during this process, the sealing performance of the exhaust valve plate 65 to the internal channel 62 is unqualified.

[0029] like Figure 6 As shown, the shifting unit 5 includes a support base 51 fixedly installed on the top left side of the workbench 11. The support base 51 is made of HT200 gray cast iron, which provides high support reliability. A guide column 52 is fixedly installed on the top rear side of the support base 51. A counterweight beam 53 made of No. 45 steel is slidably sleeved on the outside of the guide column 52 in the vertical direction via a linear bearing. The counterweight is evenly distributed, the drop is stable, and the meshing of the gear 57 and the rack 55 is accurate. A lower limit plate 54, a rack 55, and an upper limit plate 56 are fixedly installed on the front of the counterweight beam 53 from bottom to top. A gear 57 is meshed on the front of the rack 55 and is sleeved on the outside of the adjacent hollow shaft 48 via a one-way bearing and blocked from below by the lower limit plate 54.

[0030] By setting the above structure, during the upward movement of the intermediate plate 41, the left hollow shaft 48 drives the gear 57 to rise synchronously. During the upward movement, the gear 57 is driven to rotate by the rack 55. At this time, the gear 57 does not drive the adjacent hollow shaft 48 to rotate. At the same time, when the gear 57 contacts the bottom of the upper limit plate 56 due to its upward movement, as the gear 57 continues to rise, the gear 57 drives the counterweight beam 53 to slide upward on the outside of the guide column 52 through the upper limit plate 56. During the downward movement of the intermediate plate 41, the left hollow shaft 48 drives the gear 57 to descend synchronously. The counterweight beam 53 drives the lower limit plate 54, rack 55 and upper limit plate 56 to descend synchronously. When the bottom end of the counterweight beam 53 is attached to the top of the support base 51, as the intermediate plate 41 continues to descend, the rack 55 drives the gear 57 to rotate. At this time, the gear 57 drives the intermediate plate 41 to rotate clockwise through the left hollow shaft 48. When the intermediate plate 41 rotates, it drives the two lower valve seats 42 to rotate synchronously.

[0031] like Figure 7 As shown, the test piece 6 includes a cylinder head 61 located inside the adjacent positioning groove 43. The top of the cylinder head 61 has multiple outer channels 63 and inner channels 62 evenly distributed in a ring from the inside to the outside. An intake valve plate 64 is fixedly installed on the top of the cylinder head 61 to block the multiple outer channels 63. An exhaust valve plate 65 is fixedly installed on the bottom of the cylinder head 61 to block the multiple inner channels 62. Multiple clearance channels 66 are evenly opened on the top of the exhaust valve plate 65. It should be noted that the above-mentioned test piece 6 belongs to the prior art.

[0032] The specific working process of this invention is as follows: During the actual test, the test piece 6 is positioned in the positioning groove 43 on the top of the upper lower valve seat 42. Then, the hydraulic cylinder 31 drives the lifting frame 32 to rise continuously. The lifting frame 32 drives the intermediate plate 41 to rise through two hollow shafts 48. When the intermediate plate 41 rises, it drives the lower valve seat 42 with the test piece 6 on its top and the lower valve seat 42 without the test piece 6 on its bottom to rise synchronously until the upper lower valve seat 42 is in contact with the bottom of the upper valve seat 21. Then, the hydraulic cylinder 31 stops driving the lifting frame 32 to rise. At this time, the top of the cylinder head 61 is tightly in contact with the bottom opening of the annular inner groove A22 and the annular outer groove A23. During the upward movement of the intermediate plate 41, the hollow shaft 48 on the left side drives the gear 57 to rise synchronously. During the upward movement of the gear 57, it is driven to rotate by the rack 55. At this time, the gear 57 does not drive the adjacent hollow shaft 48 to rotate. At the same time, when the gear 57 contacts the bottom of the upper limit plate 56 due to the upward movement, as the gear 57 continues to rise, the gear 57 drives the counterweight beam 53 to slide upward on the outside of the guide column 52 through the upper limit plate 56. Record the readings of pressure gauge A24 and right-side pressure gauge B46. Simultaneously start vacuum pump A26 and right-side vacuum pump B410. At this time, vacuum pump A26 evacuates the inside of the annular outer groove A23 through the inlet pipe A25, and vacuum pump B410 evacuates the inside of the annular inner groove B44 through the connecting pipe 49, hollow shaft 48 and inlet pipe B47. During the evacuation process, check the readings of pressure gauge A24 and pressure gauge B46. If the reading of pressure gauge A24 decreases during this process, the sealing performance of the inlet valve plate 64 to the external channel 63 is unqualified. If the reading of the right-side vacuum pump B410 decreases during this process, the sealing performance of the exhaust valve plate 65 to the internal channel 62 is unqualified. After the test is completed, vacuum pumps A26 and B410 are stopped. At this time, outside air re-enters the annular outer groove A23 and annular inner groove B44 through vacuum pumps A26 and B410. Take the next test piece 6 and make the hydraulic cylinder 31 drive the lifting frame 32 to descend continuously. At this time, the lifting frame 32 drives the intermediate plate 41 to descend through the two hollow shafts 48. When the intermediate plate 41 descends, it drives the two lower valve seats 42 to descend synchronously. At this time, the upper lower valve seat 42 is separated from the bottom of the upper valve seat 21. During the descent of the intermediate plate 41, the hollow shaft 48 on the left side drives the gear 57 to descend synchronously, while the counterweight beam 53 drives the lower limit plate 54, rack 55 and upper limit plate 56 to descend synchronously. When the bottom end of the counterweight beam 53 is attached to the top of the support base 51, as the intermediate plate 41 continues to descend, the rack 55 drives the gear 57 to rotate. At this time, the gear 57 drives the intermediate plate 41 to rotate clockwise through the hollow shaft 48 on the left side. When the intermediate plate 41 rotates, it drives the two lower valve seats 42 to rotate synchronously. When gear 57 contacts the top of the lower limit plate 54 again, the hydraulic cylinder 31 stops driving the lifting frame 32 to descend. At this time, the two lower valve seats 42 are switched, and the test piece 6 that has completed the test falls from the lower positioning groove 43 to the top of the buffer pad 14. During this process, the next test piece 6 to be tested is placed in the positioning groove 43 at the top of the upper lower valve seat 42 for positioning. When the left hollow shaft 48 drives the middle plate 41 to rotate, the middle plate 41 drives the right hollow shaft 48 to rotate synchronously. When the right hollow shaft 48 rotates, it drives the movable disk 35 to rotate synchronously, which in turn causes the movable disk 35 to drive the two moving magnets 36 to rotate synchronously. At this time, the moving magnet 36, which was originally magnetically attracted to the fixed magnet 34, separates from the fixed magnet 34. After the two lower valve seats 42 are switched, the other moving magnet 36 is magnetically attracted and fixed to the fixed magnet 34, thereby preventing the two hollow shafts 48 from driving the middle plate 41 to rotate arbitrarily inside the lifting frame 32.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compressor valve plate performance testing device, comprising a workbench assembly (1), characterized in that: The upper test unit (2) is provided on the top inner side of the workbench assembly (1). The lifting unit (3) extending to the inner side of the top of the workbench assembly (1) is provided. The test component (4) is rotatably provided on the bottom inner side of the lifting unit (3). The left side of the test component (4) is provided with a shifting unit (5) that can drive it to rotate. The test piece (6) is placed on the top of the test component (4). The upper test unit (2) includes an upper valve seat (21). The bottom center of the upper valve seat (21) is provided with an annular inner groove A (22) and an annular outer groove A (23) in concentric circles from the inside to the outside. A pressure gauge A (24) is fixedly installed through the right side of the upper valve seat (21) and communicates with the annular inner groove A (22). An air inlet pipe A (25) is fixedly installed through the left side of the upper valve seat (21) and communicates with the annular outer groove A (23). A vacuum pump A (26) is fixedly connected to the output end of the air inlet pipe A (25). The test assembly (4) includes an intermediate plate (41). The intermediate plate (41) is provided with a lower test unit at its top and bottom. Each set of the lower test units includes a lower valve seat (42) fixedly connected to the intermediate plate (41). The lower valve seat (42) is provided with a positioning groove (43) on the side away from the intermediate plate (41). The positioning groove (43) is provided with an annular inner groove B (44) and an annular outer groove B (45) in concentric circles from the inside to the outside. The lower valve seat (42) is fixedly provided with a pressure gauge B (46) connected to the annular outer groove B (45) and an air inlet pipe B (47) connected to the annular inner groove B (44). The output end of the air inlet pipe B (47) is fixedly connected to a hollow shaft (48) fixedly provided on the side of the intermediate plate (41). The output end of the hollow shaft (48) is connected to a connecting pipe (49) through a rotary joint. The output end of the connecting pipe (49) is fixedly connected to a vacuum pump B (410). The vacuum pump B (410), connecting pipe (49), hollow shaft (48), air inlet pipe B (47), annular inner groove B (44), annular inner groove A (22) and pressure gauge A (24) form a first detection path, and the vacuum pump A (26), air inlet pipe A (25), annular outer groove A (23), annular outer groove B (45) and pressure gauge B (46) form a second detection path.

2. The compressor valve plate performance testing device according to claim 1, characterized in that: The workbench assembly (1) includes a workbench (11), and a top frame (12) is fixedly installed on both sides of the top of the workbench (11). A clearance groove (13) is opened on both sides of the top frame (12), and a cushioning pad (14) is placed at the center of the top of the workbench (11).

3. The compressor valve plate performance testing device according to claim 2, characterized in that: The upper valve seat (21) is fixedly provided with four fixed rods (27) at the top corners. The four fixed rods (27) are fixedly provided on the top inner side of the top frame (12). The vacuum pump A (26) is fixedly provided on the middle left side of the top frame (12).

4. The compressor valve plate performance testing device according to claim 3, characterized in that: The lifting unit (3) includes a hydraulic cylinder (31) fixedly installed on the top of the top frame (12). The output shaft of the hydraulic cylinder (31) extends to the inside of the top frame (12) and is fixedly connected to the lifting frame (32). Guide shafts (33) that slide through the top frame (12) in the vertical direction via linear bearings are fixedly installed on both sides of the top of the hydraulic cylinder (31).

5. The compressor valve plate performance testing device according to claim 4, characterized in that: The lifting frame (32) is rotatably sleeved on the outside of two hollow shafts (48) via ball bearings. A fixed magnet (34) is fixedly nested on the right side of the lifting frame (32). The lifting unit (3) also includes a movable disk (35) fixedly sleeved on the outside of adjacent hollow shafts (48). Two moving magnets (36) are fixedly nested on the side of the movable disk (35). Any one of the moving magnets (36) is magnetically attracted to the fixed magnet (34).

6. The compressor valve plate performance testing device according to claim 5, characterized in that: The shifting unit (5) includes a support base (51) fixedly installed on the top left side of the workbench (11). A guide column (52) is fixedly installed on the top rear side of the support base (51). A counterweight beam (53) is slidably sleeved on the outside of the guide column (52) in the vertical direction through a linear bearing.

7. The compressor valve plate performance testing device according to claim 6, characterized in that: The counterweight beam (53) is fixedly provided with a lower limit plate (54), a rack (55) and an upper limit plate (56) from bottom to top on the front side. The rack (55) has a gear (57) meshing on the front side, which is sleeved on the outside of the adjacent hollow shaft (48) through a one-way bearing and blocked from below by the lower limit plate (54).

8. The compressor valve plate performance testing device according to claim 7, characterized in that: The test piece (6) includes a cylinder head (61) located inside the adjacent positioning groove (43). The top of the cylinder head (61) is evenly provided with a plurality of outer channels (63) and inner channels (62) arranged in a ring from the inside to the outside.

9. The compressor valve plate performance testing device according to claim 8, characterized in that: The cylinder head (61) is fixedly provided with an intake valve plate (64) that blocks multiple external channels (63) at the top, and the cylinder head (61) is fixedly provided with an exhaust valve plate (65) that blocks multiple internal channels (62) at the bottom, and multiple clearance channels (66) are evenly provided on the top of the exhaust valve plate (65).

Images