A sealing performance testing device for a harvester drive axle

Abstract

The present invention provides a harvester drive axle sealing performance detection device, which relates to the technical field of fluid sealing test, and includes a detection device body and a drive axle housing to be tested, the detection device body includes a detection water tank, a test platform, a top seal and an end seal, columns are welded on the outer sides of both ends of the detection water tank, the top of the column is integrally formed with a support plate, the bottom of the support plate is screwed with an electric lifting rod, the test platform is screwed to the bottom end of the electric lifting rod, the test platform includes a top plate and a placement table, and the drive axle housing to be tested is placed on the surface of the placement table. The sealing performance detection device can detect extremely small leakages, and can accurately determine the specific location where the leakage occurs, reduce external interference, and can also simulate the actual operating sealing conditions under use, provide a vibration simulation effect, and the detection result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of fluid sealing test, and in particular to a sealing performance detection device for a harvester drive axle. Background Art

[0002] The drive axle of the harvester is an important part of the harvester. It is mainly used to connect the wheels and the engine to transmit power, thereby driving the harvester forward and operating the cutting system. It also has a steering function to ensure the stability and reliability of the harvester during operation. The sealing of the drive axle will directly affect the stability and reliability of the harvester during driving. Therefore, the sealing of the drive axle needs to be tested during the production and processing.

[0003] In the prior art, the sealing detection device used in the drive axle of the harvester generally judges the airtightness by inflating and then detecting whether the inflated air pressure changes. However, this solution can only detect the overall sealing of the drive axle to be tested. When a leak occurs, it is impossible to accurately and directly determine the more detailed leakage location. Although the location of the leak can be determined by observing the location of the bubble generation through immersion, it is difficult to observe the bubbles generated in extremely small leaks, which further increases the difficulty of determining the leakage location. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a harvester drive axle sealing performance detection device to solve the problems raised in the above-mentioned background technology. The present invention can detect extremely small leakage situations and can accurately determine the specific location where the leakage occurs. At the same time, it can also simulate the actual operating sealing conditions under use, provide a vibration simulation effect, and the detection results are more accurate.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a harvester drive axle sealing performance detection device, including a detection device body and a drive axle shell to be tested, the detection device body includes a detection water trough, a test platform, a top seal and an end seal, columns are welded on the outer sides of both ends of the detection water trough, the top of the column is integrally formed with a support plate, the bottom of the support plate is screwed with an electric lifting rod, the test platform is screwed at the bottom end of the electric lifting rod, the test platform includes a top plate and a placement table, the drive axle shell to be tested is placed on the surface of the placement table, the two ends of the drive axle shell to be tested are integrally formed with a first sealing plate, the end seals are inserted into the inner sides of the two ends of the drive axle shell to be tested, the top seal passes downward from the middle position of the top plate, and the bottom end of the top seal is pressed on the middle position of the surface of the drive axle shell to be tested.

[0006] Furthermore, connecting plates are welded at both ends of the surface of the placing table, a groove is opened on the inner side of the connecting plate, a ring is welded on the inner wall of the groove, a rotating base is installed in the middle of the surface of the placing table, an air pump is screwed on the surface of the top plate, and both ends of the air pump are respectively connected to an exhaust pipe and an inflation pipe.

[0007] Furthermore, an observation tube is installed on the surface of the top plate, a water inlet is integrally formed on the top of the observation tube, a sealing cover is installed on the top of the water inlet, and scale lines are printed on the side of the observation tube.

[0008] Furthermore, the inflation pipe penetrates downward from the surface of the top plate into the interior of the groove, and the inflation pipe passes through the inside of the ring, the bottom end of the electric lifting rod is fixedly connected to the surface corner of the top plate, the edge of the top plate is aligned with the edge of the detection water tank, a drain outlet is opened on one side of the bottom of the detection water tank, and a valve is installed on the surface of the drain outlet.

[0009] Furthermore, the end seal includes a second sealing plate, a plug-in sleeve and a blocking mechanism, an air inlet is opened in the middle of the second sealing plate, the end of the inflation pipe is embedded in the interior of the air inlet, and the surface of the second sealing plate is fixedly connected to the first sealing plate by bolts.

[0010] Furthermore, the blocking mechanism is installed on the surface of the plug-in sleeve, and the plug-in sleeve is integrally embedded in the interior of the drive axle housing to be tested, and the blocking mechanism includes an airbag and an elastic sponge layer.

[0011] Furthermore, a connecting hole is opened on the surface of the plug-in sleeve, the airbag is bonded to the outside of the connecting hole, the elastic sponge layer covers the side of the airbag, and the inflation pipe conveys the high-pressure airflow to the inside of the plug-in sleeve.

[0012] Furthermore, the top seal includes a support sleeve, a motor and a third sealing plate, the top of the support sleeve is integrally formed with a fixing plate, the side of the support sleeve is integrally formed with an extension sleeve, and the end of the exhaust pipe is fixedly connected to the end of the extension sleeve.

[0013] Furthermore, a driving shaft is plugged into the output end of the motor, a hose is bonded to the bottom of the support sleeve, and a center frame is integrally formed in the middle of the surface of the third sealing plate.

[0014] Furthermore, a plurality of air exhaust ports are provided inside the center frame, the end of the drive shaft is welded to the middle position of the center frame as a whole, the third sealing plate is screwed to the middle position of the drive axle housing to be tested, and the end of the hose is attached to the edge of the top of the center frame.

[0015] Beneficial effects of the present invention:

[0016] 1. The harvester drive axle sealing performance detection device forms a low-pressure cavity by extracting the internal air and immersing it in a water tank for a long time. By observing the water level line inside the water tank, it can determine whether there is a leak and can detect even the smallest leak.

[0017] 2. The harvester drive axle sealing performance detection device connects multiple barrier mechanisms through plug-in sleeves in the end seals at both ends. After leakage occurs, it can be observed whether each barrier mechanism absorbs water and the specific position of the barrier mechanism where water absorption occurs, so as to accurately determine the specific location of the leakage.

[0018] 3. The harvester drive axle sealing performance testing device supports the drive axle housing to be tested through a test platform, and provides an additional reciprocating rotation drive effect through the top seal, so as to simulate the actual operating sealing conditions under use, provide a vibration simulation effect, and make the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the appearance of a sealing performance detection device for a harvester drive axle of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the drive axle housing to be tested after installation of the present invention;

[0021] Figure 3 It is a schematic structural diagram of the end seal part of the present invention;

[0022] Figure 4 A side cross-sectional view of the barrier mechanism portion of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the test platform part of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the top sealing part of the present invention;

[0025] In the figure: 1. test water tank; 2. column; 3. support plate; 4. drain outlet; 5. drive axle housing to be tested; 6. test platform; 7. top seal; 8. end seal; 9. placement table; 10. rotating base; 11. top plate; 12. air pump; 13. exhaust pipe; 14. inflation pipe; 15. electric lifting rod; 16. first sealing plate; 17. second sealing plate; 18. air inlet; 19. plug-in sleeve; 20. blocking mechanism; 21. connecting hole; 22. air bag; 23. elastic sponge layer; 24. connecting plate; 25. groove; 26. collar; 27. observation tube; 28. water injection port; 29. ​​support sleeve; 30. fixing plate; 31. extension sleeve; 32. motor; 33. hose; 34. drive shaft; 35. third sealing plate; 36. center frame; 37. exhaust port. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0027] See also Figures 1 to 6 The present invention provides the following technical solutions: a harvester drive axle sealing performance detection device, comprising a detection device body and a drive axle housing 5 to be tested, the detection device body comprising a detection water tank 1, a test platform 6, a top seal 7 and an end seal 8, the two ends of the detection water tank 1 are welded with columns 2 on the outside, the top of the column 2 is integrally formed with a support plate 3, the bottom of the support plate 3 is screwed with an electric lifting rod 15, the test platform 6 is screwed at the bottom of the electric lifting rod 15, the test platform 6 comprises a top plate 11 and a placement table 9, the drive axle housing 5 to be tested is placed on the surface of the placement table 9, the two ends of the drive axle housing 5 to be tested are integrally formed with a first sealing plate 16, the end seal 8 is inserted into the inner side of the two ends of the drive axle housing 5 to be tested, the top seal 7 passes downward from the middle position of the top plate 11, and the bottom end of the top seal 7 is pressed on the middle position of the surface of the drive axle housing 5 to be tested. The harvester drive axle sealing performance detection device is used to check whether there is a leak on the surface of the drive axle housing 5 to be tested.

[0028] When the present invention is used, the test platform 6 is first lifted upward by the electric lifting rod 15, and then the drive axle housing 5 to be tested is installed on the placement table 9 of the test platform 6, and the ends of the drive axle housing 5 to be tested are sealed by the end seals 8 at both ends. At the same time, the middle transmission port part of the drive axle housing 5 to be tested is sealed and connected with the help of the top seal 7, and the top air pump 12 is started to extract the air inside the drive axle housing 5 to be tested and transport it to the inside of the end seal 8. In this process, it is not necessary to form a complete vacuum state inside the drive axle housing 5 to be tested, and it is only necessary to ensure that the inside of the drive axle housing 5 to be tested forms a low vacuum state. The pneumatic electric lifting rod 15 drives the test platform 6 and the drive axle housing 5 to be tested to move downward until the top plate 11 of the test platform 6 is pressed on the top of the test water tank 1, and the test water tank 1 is sealed, and the external water source can be injected into the inside of the test water tank 1 from the water inlet 28 on the top until the water level line reaches any position inside the observation tube 27. After standing for a period of time, by checking whether the water level line inside the observation tube 27 has dropped, it can be judged whether the water inside the test water tank 1 has flowed into the inside of the drive axle housing 5 to be tested, and then it can be judged whether the sealing of the drive axle housing 5 to be tested is qualified.

[0029] In this embodiment, connecting plates 24 are welded at both ends of the surface of the placing table 9, a groove 25 is provided on the inner side of the connecting plate 24, a collar 26 is welded on the inner wall of the groove 25, a rotating base 10 is installed in the middle of the surface of the placing table 9, an air pump 12 is screwed on the surface of the top plate 11, and the two ends of the air pump 12 are respectively connected to the exhaust pipe 13 and the inflation pipe 14. An observation tube 27 is installed on the surface of the top plate 11, and a water injection port 28 is integrally formed on the top of the observation tube 27, a sealing cover is installed on the top of the water injection port 28, and scale lines are printed on the side of the observation tube 27. The air-filled pipe 14 penetrates downward from the surface of the top plate 11 into the interior of the groove 25, and the air-filled pipe 14 passes through the interior of the collar 26. The bottom end of the electric lifting rod 15 is fixedly connected to the surface corner of the top plate 11. The edge of the top plate 11 is aligned with the edge of the detection water tank 1. A drain port 4 is provided on one side of the bottom of the detection water tank 1, and a valve is installed on the surface of the drain port 4. By extracting the internal air, a low-pressure cavity is formed, and it is immersed in the water tank for a long time. By observing the water level line inside the water tank, it is possible to determine whether there is a leak, and it is possible to detect extremely small leaks.

[0030] Specifically, the placement table 9 is used to install the drive axle housing 5 to be tested, and the docking process of the two ends of the drive axle housing 5 to be tested and the middle transmission hole part is completed on the surface of the placement table 9. After all the installation is completed, the entire test platform 6 can be driven to descend through the electric lifting rod 15 until the detection water tank 1 part is sealed. After the test platform 6 is installed, the entire detection water tank 1 will be directly sealed. Subsequently, the test solution will be injected into the interior along the water injection port 28, and the drive axle housing 5 to be tested can be completely immersed. Therefore, if there is leakage at any position on the surface of the drive axle housing 5 to be tested, it can be checked and judged through the observation tube 27.

[0031] In this embodiment, the end seal 8 includes a second sealing plate 17, a plug-in sleeve 19 and a blocking mechanism 20. An air inlet 18 is provided in the middle of the second sealing plate 17. The end of the inflation pipe 14 is embedded in the air inlet 18. The surface of the second sealing plate 17 is fixedly connected to the first sealing plate 16 by bolts. The blocking mechanism 20 is installed on the surface of the plug-in sleeve 19. The plug-in sleeve 19 is integrally embedded in the interior of the drive axle housing 5 to be tested. The blocking mechanism 20 includes an airbag 22 and an elastic sponge layer 23. A connecting hole 21 is provided on the surface of the plug-in sleeve 19. The airbag 22 is bonded to the outside of the connecting hole 21. The elastic sponge layer 23 covers the side of the airbag 22. The inflation pipe 14 delivers the high-pressure airflow to the interior of the plug-in sleeve 19. By connecting a plurality of barrier mechanisms 20 via plug-in sleeves 19 in the end seals 8 at both ends, after leakage occurs, it is possible to observe whether each barrier mechanism 20 absorbs water and the specific position of the barrier mechanism 20 where water absorption occurs, thereby accurately determining the specific position of the leakage.

[0032] Specifically, after the plug-in sleeve 19 is inserted into the interior of the drive axle housing 5 to be tested, the first sealing plate 16 and the second sealing plate 17 are fitted and sealed with bolts, and after the high-pressure airflow is filled, each airbag 22 can be expanded until the elastic sponge layer 23 attached to the side is pressed against the inner wall of the drive axle housing 5 to be tested, so as to achieve the effect of layered treatment of the inner wall of the drive axle housing 5 to be tested. When there is a leak at any position of the drive axle housing 5 to be tested during the subsequent test process, the solution entering the interior of the drive axle housing 5 to be tested will be blocked by the two adjacent barrier mechanisms. The blocking of the structure 20 makes only the elastic sponge layer 23 on the barrier mechanisms 20 on both sides absorb water and soak. After checking the liquid level drop through the observation tube 27 on the outside, the drive axle housing 5 to be tested can be directly taken out, and the end seals 8 at both ends can be opened to directly observe the specific position of the barrier mechanism 20 where moisture appears. At this time, the corresponding area of ​​the drive axle housing 5 to be tested where leakage occurs can be determined. If leakage occurs in the middle position of the drive axle housing 5 to be tested, the liquid level in the observation tube 27 will drop, but each barrier mechanism 20 will not absorb liquid.

[0033] In this embodiment, the top seal 7 includes a support sleeve 29, a motor 32 and a third sealing plate 35. The top of the support sleeve 29 is integrally formed with a fixing plate 30, the side of the support sleeve 29 is integrally formed with an extension sleeve 31, and the end of the exhaust pipe 13 is fixedly connected to the end of the extension sleeve 31. The output end of the motor 32 is plugged with a drive shaft 34, the bottom of the support sleeve 29 is bonded with a hose 33, and the middle of the surface of the third sealing plate 35 is integrally formed with a center frame 36. The center frame 36 is provided with a plurality of exhaust ports 37, the end of the drive shaft 34 is welded to the middle position of the center frame 36 as a whole, the third sealing plate 35 is screwed to the middle position of the drive axle housing 5 to be tested, and the end of the hose 33 is attached to the edge of the top of the center frame 36. The drive axle housing 5 to be tested is supported by the test platform 6, and the top seal 7 provides an additional reciprocating rotation drive effect, so that the actual running sealing condition under the use state can be simulated, the vibration simulation effect is provided, and the detection result is more accurate.

[0034] Specifically, after starting the motor 32 at the top, the third sealing plate 35 at the bottom is driven to rotate through the driving shaft 34, and the third sealing plate 35 drives the entire drive axle housing 5 to be tested to rotate, which can provide a certain vibration effect, simulating the impact of the drive axle housing 5 to be tested on the sealing during normal driving. In this process, the top hose 33 part is always connected to the center frame 36 in a rotating state, ensuring that the middle transmission port part of the drive axle housing 5 to be tested always remains in a sealed state.

[0035] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A harvester drive axle sealing performance testing device, comprising a testing device body and a drive axle housing (5) to be tested, characterized in that: The detection device body comprises a detection water tank (1), a test platform (6), a top seal (7) and an end seal (8); columns (2) are welded to the outer sides of both ends of the detection water tank (1); a support plate (3) is integrally formed on the top of the column (2); an electric lifting rod (15) is screwed to the bottom of the support plate (3); the test platform (6) is screwed to the bottom end of the electric lifting rod (15); the test platform (6) comprises a top plate (11) and a placement table (9); the drive axle housing (5) to be tested is placed on the surface of the placement table (9); first sealing plates (16) are integrally formed on both ends of the drive axle housing (5) to be tested; the end seals (8) are inserted into the inner sides of both ends of the drive axle housing (5) to be tested; the top seal (7) passes downward from the middle position of the top plate (11), and the bottom end of the top seal (7) is pressed against the middle position of the surface of the drive axle housing (5) to be tested.

2. A harvester drive axle sealing performance detection device according to claim 1, characterized in that: Connecting plates (24) are welded at both ends of the surface of the placement table (9), a groove (25) is formed on the inner side of the connecting plate (24), a collar (26) is welded on the inner wall of the groove (25), a rotating base (10) is installed in the middle of the surface of the placement table (9), an air pump (12) is screwed on the surface of the top plate (11), and both ends of the air pump (12) are respectively connected to an exhaust pipe (13) and an air charging pipe (14).

3. The sealing performance detection device for a harvester drive axle according to claim 2, characterized in that: An observation tube (27) is installed on the surface of the top plate (11), a water injection port (28) is integrally formed on the top of the observation tube (27), a sealing cover is installed on the top of the water injection port (28), and scale lines are printed on the side of the observation tube (27).

4. The sealing performance detection device for a harvester drive axle according to claim 3, characterized in that: The inflation pipe (14) penetrates downward from the surface of the top plate (11) into the interior of the groove (25), and the inflation pipe (14) passes through the interior of the collar (26); the bottom end of the electric lifting rod (15) is fixedly connected to the surface corner of the top plate (11); the edge of the top plate (11) is aligned with the edge of the detection water tank (1); a drain outlet (4) is provided on one side of the bottom of the detection water tank (1), and a valve is installed on the surface of the drain outlet (4).

5. The sealing performance detection device for a harvester drive axle according to claim 2, characterized in that: The end seal (8) comprises a second sealing plate (17), a plug-in sleeve (19) and a blocking mechanism (20); an air inlet (18) is provided in the middle of the second sealing plate (17); the end of the inflation pipe (14) is embedded in the air inlet (18); and the surface of the second sealing plate (17) is fixedly connected to the first sealing plate (16) by bolts.

6. The sealing performance detection device for a harvester drive axle according to claim 5, characterized in that: The blocking mechanism (20) is mounted on the surface of a plug-in sleeve (19); the plug-in sleeve (19) is integrally embedded in the interior of a drive axle housing (5) to be tested; and the blocking mechanism (20) comprises an airbag (22) and an elastic sponge layer (23).

7. The sealing performance detection device for a harvester drive axle according to claim 6, characterized in that: A communication hole (21) is formed on the surface of the plug-in sleeve (19), the airbag (22) is bonded to the outside of the communication hole (21), the elastic sponge layer (23) covers the side of the airbag (22), and the inflation pipe (14) conveys high-pressure airflow to the interior of the plug-in sleeve (19).

8. The sealing performance detection device for a harvester drive axle according to claim 5, characterized in that: The top sealing member (7) comprises a supporting sleeve (29), a motor (32) and a third sealing plate (35); a fixing plate (30) is integrally formed on the top of the supporting sleeve (29); an extension sleeve (31) is integrally formed on the side of the supporting sleeve (29); and the end of the exhaust pipe (13) is fixedly connected to the end of the extension sleeve (31).

9. The sealing performance detection device for a harvester drive axle according to claim 8, characterized in that: The output end of the motor (32) is plugged with a drive shaft (34), the bottom of the support sleeve (29) is bonded with a hose (33), and a center frame (36) is integrally formed in the middle of the surface of the third sealing plate (35).

10. The sealing performance detection device for a harvester drive axle according to claim 9, characterized in that: A plurality of air extraction ports (37) are provided inside the center frame (36); the end of the drive shaft (34) is welded to the middle of the center frame (36) as a whole; the third sealing plate (35) is screwed to the middle of the drive axle housing (5) to be tested; and the end of the hose (33) is attached to the edge of the top of the center frame (36).

Images