Bearing sealing performance detection device

Abstract

The utility model discloses a bearing sealing performance detection device, which comprises a tool frame, a sealing assembly is arranged in the tool frame, the sealing assembly comprises a base, a sealing cylinder is arranged at the top of the base, the sealing cylinder is formed by splicing a lower sealing cylinder and an upper sealing cylinder, the lower sealing cylinder is arranged on the upper end surface of the base, and the upper sealing cylinder is arranged on the lower end surface of the base. A nozzle communicated with an external air source is arranged on the upper end face of the base and located in an inner cavity of the lower sealing cylinder, and a limiting supporting plate used for lifting the bearing and sealing an opening in the lower end face of the bearing is arranged outside the inner cavity of the lower sealing cylinder and surrounds the nozzle. The upper sealing cylinder is arranged over the lower sealing cylinder, and the upper sealing cylinder can be driven by the air cylinder to be tightly pressed above the lower sealing cylinder to seal an inner cavity of the lower sealing cylinder. The bearing leakproofness detection device disclosed by the utility model can quickly detect the leakproofness of the bearing, prevents the bearing with unqualified leakproofness from flowing out for use, solves the problem of leakproofness detection before the bearing is installed and used in the prior art, and is suitable for production detection of large-batch bearings.

Description

Technical Field

[0001] This utility model relates to the technical field of bearing sealing testing equipment, and specifically to a bearing sealing performance testing device. Background Technology

[0002] Bearings are crucial components in modern machinery. Their primary function is to support rotating parts, reduce friction during operation, and ensure rotational accuracy. Sealing performance testing is a vital step in ensuring proper operation and extending service life. Effective sealing prevents external contaminants (such as dust and moisture) from entering the bearing, while also preventing grease leakage, thus maintaining lubrication stability, reducing wear, and extending service life. If the seal fails, contaminants can cause abnormal wear on the rolling elements and raceways, and grease loss exacerbates friction and temperature increases, ultimately leading to bearing seizure, vibration, or premature failure, directly impacting equipment reliability and safety. Therefore, it is necessary to test the sealing performance of bearings before installation and use. Consequently, those skilled in the art have provided a bearing sealing performance testing device to address the problems mentioned in the background section. Utility Model Content

[0003] The purpose of this invention is to provide a bearing sealing performance testing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A bearing sealing performance testing device includes: a tooling frame, with a sealing assembly inside the tooling frame. The sealing assembly includes a base, and a sealing cylinder is provided on the top of the base. The sealing cylinder is composed of a lower sealing cylinder and an upper sealing cylinder. The lower sealing cylinder is located on the upper end face of the base. A nozzle communicating with an external air source is provided on the upper end face of the base within the inner cavity of the lower sealing cylinder. A limiting support plate for lifting the bearing and closing its lower end face opening is provided around the nozzle within the inner cavity of the lower sealing cylinder. The upper sealing cylinder is located directly above the lower sealing cylinder and can be pressed tightly against the upper sealing cylinder by a cylinder to close its inner cavity. A differential pressure sensor for detecting the air pressure within the lower sealing cylinder is provided on the inner wall of the lower sealing cylinder. A sealing end plate is provided within the inner cavity of the upper sealing cylinder, covering the upper end face of the bearing and closing its opening.

[0006] Preferably, the base has an air passage connected to a nozzle inside, and the outer wall of the base is provided with an air pipe connected to the air passage, which is connected to the output end of an external air compressor.

[0007] Preferably, a through hole is provided at the middle position of the limiting plate, the limiting plate is fitted onto the outside of the nozzle through the through hole, and a sealing ring is filled between the inner wall of the through hole and the outer wall of the nozzle.

[0008] Preferably, the upper end face of the limiting plate is provided with an annular groove for defining the bearing position around the outside of the through hole. The bearing is engaged and installed inside the annular groove. Furthermore, the inner wall of the annular groove is provided with a second sealing gasket for fitting against the lower end face of the bearing. The limiting plate is provided in several ways, and the annular grooves on the upper end face of the several limiting plates correspond to various models of bearings.

[0009] Preferably, the lower end face of the closed end plate is provided with an annular groove, the closed end plate is engaged with the upper end face of the bearing through the annular groove and the opening is closed, and the inner wall of the annular groove is provided with a third sealing gasket for fitting with the upper end face of the bearing, and there are several closed end plates, the annular grooves on the lower end face of the several closed end plates correspond to various models of the bearing.

[0010] Preferably, a threaded rod is threadedly installed on the upper end face of the closed end plate, and a sleeve is provided at the middle position of the inner cavity of the upper sealing cylinder. The inner cavity of the sleeve has a threaded groove. The end of the threaded rod away from the closed end plate is threadedly installed in the inner cavity of the sleeve through the threaded groove. Furthermore, there are several threaded rods, and the length of the several threaded rods is adapted to the thickness of the bearing.

[0011] Preferably, the lower end face of the upper sealing tube is provided with an annular support ear, and the upper end face of the lower sealing tube is provided with a slot at the position corresponding to the annular support ear. The annular support ear is inserted into the inside of the slot, and the inner wall of the slot is provided with a first sealing gasket.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] By setting up a sealing cylinder, the bearing can be clamped inside the sealing cylinder using a limiting plate and a closing end plate, sealing the openings at both ends of the bearing. Then, air is injected into the inner cavity of the bearing, and the bearing leakage is confirmed by detecting the change in air pressure inside the sealing cylinder through a differential pressure sensor. This achieves the purpose of bearing sealing performance testing, which can quickly detect the sealing performance of the bearing and prevent bearings with unqualified sealing performance from being released for use. It solves the problem of bearing sealing performance testing before installation and use in the existing technology and is suitable for mass production testing of bearings.

[0014] By setting limit plates and sealing end plates, the limit plates and sealing end plates that are compatible with the bearing model can be replaced. The upper and lower ends of the bearing are respectively engaged in the annular groove and annular slot, and the bearing opening is sealed by the second sealing gasket and the third sealing gasket. This method is suitable for sealing tests of different bearing models. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bearing sealing performance testing device according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of a bearing sealing performance test according to an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram showing the disassembled upper sealing cylinder and the closed end plate according to an embodiment of the present utility model;

[0018] Figure 4 This is a perspective view of a limiting tray according to an embodiment of the present utility model.

[0019] In the diagram: 1. Tooling frame; 2. Sealing assembly; 21. Base; 211. Nozzle; 212. Inflation channel; 22. Lower sealing cylinder; 221. Slot; 222. First sealing gasket; 23. Upper sealing cylinder; 231. Annular support lug; 24. Limiting plate; 241. Through hole; 242. Sealing ring; 243. Annular groove; 244. Second sealing gasket; 25. Sealing end plate; 251. Annular slot; 252. Third sealing gasket; 26. Threaded rod; 27. Sleeve; 271. Threaded groove; 28. Air pipe; 3. Cylinder; 4. Differential pressure sensor. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0021] Combination Figures 1-4As shown, a bearing sealing performance testing device includes: a fixture 1, with a sealing assembly 2 disposed inside the fixture 1. The sealing assembly 2 includes a base 21, and a sealing cylinder is disposed on the top of the base 21. The sealing cylinder is composed of a lower sealing cylinder 22 and an upper sealing cylinder 23. The lower sealing cylinder 22 is disposed on the upper end face of the base 21, and a nozzle 211 communicating with an external air source is disposed on the upper end face of the base 21 within the inner cavity of the lower sealing cylinder 22. The inner cavity of the lower sealing cylinder 22 surrounds the nozzle. The outer side of 211 is provided with a limiting plate 24 for lifting the bearing and closing the opening of its lower end face; the upper sealing cylinder 23 is located directly above the lower sealing cylinder 22, and the upper sealing cylinder 23 can be pressed tightly against the upper part of the lower sealing cylinder 22 by the drive of the cylinder 3 to close its inner cavity. The inner wall of the lower sealing cylinder 22 is provided with a differential pressure sensor 4 for detecting the air pressure in its inner cavity, and the inner cavity of the upper sealing cylinder 23 is provided with a sealing end plate 25, which covers the upper end face of the bearing and closes its opening.

[0022] In one embodiment, the base 21 has an air passage 212 connected to a nozzle 211 inside, and the outer wall of the base 21 is provided with an air pipe 28 connected to the air passage 212. The air pipe 28 is connected to the output end of an external air compressor. The high-pressure air output from the external air compressor can be transported into the air passage 212 through the air pipe 28, so that the high-pressure air flows through the air passage 212 and is sprayed out from the nozzle 211 to the inner cavity of the bearing, which plays an auxiliary role in the sealing test of the bearing.

[0023] In one embodiment, a through hole 241 is provided at the middle position of the limiting plate 24. The limiting plate 24 is fitted onto the outside of the nozzle 211 through the through hole 241, and a sealing ring 242 is filled between the inner wall of the through hole 241 and the outer wall of the nozzle 211. When installing the limiting plate 24, the limiting plate 24 can be fitted onto the outside of the nozzle 211 through the through hole 241, and the sealing ring 242 seals the gap between the nozzle 211 and the inner wall of the through hole 241, which can prevent high-pressure air from leaking from the gap and ensure the use of the limiting plate 24.

[0024] In one embodiment, a threaded rod 26 is threadedly mounted on the upper end face of the closed end plate 25, and a sleeve 27 is provided at the middle position of the inner cavity of the upper sealing cylinder 23. The inner cavity of the sleeve 27 has a threaded groove 271. The end of the threaded rod 26 away from the closed end plate 25 is threadedly mounted on the inner cavity of the sleeve 27 through the threaded groove 271. When installing the closed end plate 25, the threaded rod 26 can be installed in the sleeve 27 through the threaded groove 271, so that the closed end plate 25 located at the other end of the threaded rod 26 extends to the lower part of the upper sealing cylinder 23. This allows the closed end plate 25 to follow the displacement of the upper sealing cylinder 23 and engage with the upper end face of the bearing, which facilitates the use of the closed end plate 25.

[0025] In one embodiment, since there are several threaded rods 26, and the length of several threaded rods 26 is adapted to the thickness of the bearing, threaded rods 26 of different lengths can be replaced according to the change in the thickness of the bearing, thereby changing the position of the closed end plate 25 extending from the threaded rods 26 to the lower part of the upper sealing cylinder 23, so that the closed end plate 25 is always locked and tightly pressed against the upper end face of the bearing to close the opening of its upper end face, thus ensuring the use of the closed end plate 25.

[0026] In one embodiment, since there are several limiting plates 24 and several closed end plates 25, the annular grooves 243 on the upper end face of the several limiting plates 24 and the annular slots 251 on the lower end face of the several closed end plates 25 correspond to various models of bearings. The limiting plates 24 and closed end plates 25 can be replaced according to the model of the bearing to fit the bearing. The upper and lower ends of the bearing are respectively engaged in the annular grooves 243 and annular slots 251. The openings at the upper and lower ends of the bearing are sealed by the second sealing gasket 244 and the third sealing gasket 252 to prevent high-pressure air from leaking from the gap between the bearing and the inner wall of the annular grooves 243 and annular slots 251. This is suitable for the sealing performance testing of bearings of different models.

[0027] In one embodiment, the lower end face of the upper sealing cylinder 23 is provided with an annular support ear 231, and the upper end face of the lower sealing cylinder 22 is provided with a slot 221 at a position corresponding to the annular support ear 231. The annular support ear 231 is inserted into the inside of the slot 221, and the inner wall of the slot 221 is provided with a first sealing gasket 222. When the upper sealing cylinder 23 and the lower sealing cylinder 22 are spliced ​​together, the upper sealing cylinder 23 can be driven by the cylinder 3 to move downward and press tightly against the upper end face of the lower sealing cylinder 22, so that the annular support ear 231 on the end face of the upper sealing cylinder 23 can be inserted into the slot 221. The first sealing gasket 222 in the slot 221 seals the gap between the upper sealing cylinder 23 and the lower sealing cylinder 22, preventing air leakage inside the sealed cylinder formed by splicing the upper sealing cylinder 23 and the lower sealing cylinder 22, and ensuring the bearing sealing performance test.

[0028] The working principle of this utility model is as follows: When testing the sealing performance of a bearing, the bearing can be directly engaged in the annular groove 243 on the upper end face of the limiting plate 24 and surround the outside of the nozzle 211. The limiting plate 24 lifts the bearing and closes the opening on the lower end face. Then, the cylinder 3 drives the upper sealing cylinder 23 to move downward, pressing the upper sealing cylinder 23 tightly against the upper end face of the lower sealing cylinder 22, forming a sealing cylinder composed of the upper sealing cylinder 23 and the lower sealing cylinder 22. At the same time, the sealing end plate 25, which is installed through the threaded rod 26 and extends to the lower part of the upper sealing cylinder 23, is pressed tightly against the upper end face of the bearing and closes the opening on its upper end face, thereby sealing the bearing. The bearing is clamped in the sealing cylinder for positioning. Finally, high-pressure air from an external air compressor is delivered into the inflation channel 212 via the air pipe 28. The high-pressure air flows through the inflation channel 212 and is ejected from the nozzle 211 into the inner cavity of the bearing. The differential pressure sensor 4 detects the change in air pressure inside the sealing cylinder to confirm whether the bearing is leaking, thus achieving the purpose of bearing sealing test. This method can quickly detect the sealing performance of the bearing and prevent unqualified bearings from being used. It solves the problem of sealing performance testing of bearings before installation and use in the prior art and is suitable for mass production testing of bearings.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bearing sealing performance testing device, comprising: A tooling frame (1), characterized in that a sealing assembly (2) is provided inside the tooling frame (1), the sealing assembly (2) including a base (21), a sealing cylinder being provided on the top of the base (21), the sealing cylinder being composed of a lower sealing cylinder (22) and an upper sealing cylinder (23), wherein the lower sealing cylinder (22) is provided on the upper end face of the base (21), the upper end face of the base (21) is located in the inner cavity of the lower sealing cylinder (22) and a nozzle (211) communicating with an external air source is provided, and the inner cavity of the lower sealing cylinder (22) surrounds the nozzle (211). The outer side of 211) is provided with a limiting plate (24) for lifting the bearing and closing the opening of its lower end face; the upper sealing cylinder (23) is located directly above the lower sealing cylinder (22), and the upper sealing cylinder (23) can be pressed tightly above the lower sealing cylinder (22) by the drive of the cylinder (3) to close its inner cavity. The inner wall of the lower sealing cylinder (22) is provided with a differential pressure sensor (4) for detecting the air pressure in its inner cavity, and the inner cavity of the upper sealing cylinder (23) is provided with a sealing end plate (25), which covers the upper end face of the bearing and closes its opening.

2. The bearing sealing performance testing device according to claim 1, characterized in that, The base (21) has an air passage (212) connected to the nozzle (211) inside, and the outer wall of the base (21) is provided with an air pipe (28) connected to the air passage (212), and the air pipe (28) is connected to the output end of an external air compressor.

3. The bearing sealing performance testing device according to claim 1, characterized in that, The limiting plate (24) has a through hole (241) at the middle position. The limiting plate (24) is fitted onto the outside of the nozzle (211) through the through hole (241). A sealing ring (242) is filled between the inner wall of the through hole (241) and the outer wall of the nozzle (211).

4. The bearing sealing performance testing device according to claim 3, characterized in that, The upper end face of the limiting plate (24) is provided with an annular groove (243) for defining the bearing position around the outside of the through hole (241). The bearing is engaged and installed inside the annular groove (243). The inner wall of the annular groove (243) is provided with a second sealing gasket (244) for fitting with the lower end face of the bearing. There are several limiting plates (24), and the annular grooves (243) on the upper end face of the several limiting plates (24) correspond to various models of bearings.

5. The bearing sealing performance testing device according to claim 1, characterized in that, The lower end face of the closed end plate (25) is provided with an annular groove (251). The closed end plate (25) is engaged with the upper end face of the bearing and its opening is closed by the annular groove (251). The inner wall of the annular groove (251) is provided with a third sealing gasket (252) for fitting with the upper end face of the bearing. There are several closed end plates (25), and the annular grooves (251) on the lower end face of the several closed end plates (25) correspond to various models of the bearing.

6. The bearing sealing performance testing device according to claim 1, characterized in that, A threaded rod (26) is threadedly installed on the upper end face of the closed end plate (25). A sleeve (27) is provided at the middle position of the inner cavity of the upper sealing cylinder (23). A threaded groove (271) is opened in the inner cavity of the sleeve (27). The end of the threaded rod (26) away from the closed end plate (25) is threadedly installed in the inner cavity of the sleeve (27) through the threaded groove (271). Furthermore, there are several threaded rods (26), and the length of several threaded rods (26) is adapted to the thickness of the bearing.

7. The bearing sealing performance testing device according to claim 1, characterized in that, The lower end face of the upper sealing cylinder (23) is provided with an annular support ear (231), and the upper end face of the lower sealing cylinder (22) is provided with a slot (221) at the position corresponding to the annular support ear (231). The annular support ear (231) is inserted into the inside of the slot (221), and the inner wall of the slot (221) is provided with a first sealing gasket (222).

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