High seal bearing

Abstract

The utility model relates to a kind of high sealing bearing, including outer ring, inner ring and ball, retaining cage is equipped between outer ring and inner ring, first ring groove is equipped on outer ring, second ring groove is equipped on inner ring, sealing element is installed between first ring groove and second ring groove, second ring groove includes step and baffle, sealing element includes metal plate and sealing ring, sealing ring includes body, inner lip and outer lip, inner lip includes the first sealing lip that with step is abutted, and the second sealing lip that with baffle is abutted;The utility model has the advantages that: the sealing ring formed by body, outer lip and inner lip, rely on the first sealing lip with step is abutted, and the second sealing lip with baffle is abutted, to realize the double sealing of sealing element, ensure that bearing interior and external environment are completely isolated, so that external medium cannot enter, internal medium cannot leak, improve the sealing performance of bearing, so that the entire bearing can satisfy motor high efficiency, long life operating demand, improve the use performance of bearing.

Description

Technical Field

[0001] This utility model relates to a high-sealing bearing. Background Technology

[0002] In recent years, with the rapid development of global industrialization and automation, capacitor starter motors have been increasingly widely used in various fields, especially in the starting process of single-phase asynchronous motors, where capacitor starting technology is particularly important. Capacitor starter motors not only have advantages such as high starting torque and good starting performance, but also possess characteristics such as simple structure and convenient maintenance. This has led to a continuous increase in demand for them in many industries, including home appliances, automobiles, and machinery manufacturing. At the same time, with the increasing complexity and harshness of industrial environments, higher requirements are being placed on the sealing performance of motor bearings. The demand for high-seal bearings is also increasing. High sealing of bearings ensures efficient and long-life operation of products. Ordinary double-sided single-layer sealed bearings cannot meet the sealing requirements of motor bearings, seriously affecting the operating efficiency and reliability of motors. Utility Model Content

[0003] The purpose of this invention is to solve the problem that existing bearings cannot meet the high-efficiency operation requirements of motors. It proposes a high-sealing bearing that uses a sealing ring formed by the body, outer lip, and inner lip. The sealing relies on the first sealing lip abutting against the step, and the second sealing lip abutting against the retaining edge, thus achieving double sealing. This ensures complete isolation between the bearing's interior and exterior environments, preventing external media from entering and internal media from leaking. This improves the bearing's sealing performance, enabling the entire bearing to meet the high-efficiency, long-life operation requirements of motors and enhancing the bearing's overall performance.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a high-sealing bearing, including an outer ring, an inner ring, and balls, wherein a cage for installing the balls is provided between the outer ring and the inner ring, a first annular groove is provided on the outer ring, and a second annular groove is provided on the inner ring, wherein a sealing element is installed between the first annular groove and the second annular groove, the second annular groove including a step and a retaining edge, the sealing element including a metal plate and a sealing ring disposed on the metal plate, the sealing ring including a body and an inner lip and an outer lip respectively disposed at both ends of the body, the outer lip being installed in the first annular groove, the inner lip being installed in the second annular groove, the inner lip including a first sealing lip abutting against the step, and a second sealing lip abutting against the retaining edge.

[0005] Preferably, the first sealing lip includes a first lip edge that abuts against the horizontal step surface of the step, and a second lip edge that abuts against the vertical step surface of the step, and the first sealing lip is an integral structure.

[0006] Preferably, the sealing ring is a rubber sealing ring, and the sealing ring is an integral structure.

[0007] Preferably, the metal plate includes a vertical portion and a horizontal portion, the horizontal portion is disposed at the top of the vertical portion, and a rounded chamfer is provided between the horizontal portion and the vertical portion.

[0008] Preferably, the metal plate is a one-piece structure.

[0009] Preferably, the inner ring is a high-carbon chromium bearing steel inner ring, and the outer ring is a high-carbon chromium bearing steel outer ring.

[0010] Preferably, the cage is provided with ball pocket holes for mounting balls.

[0011] Preferably, the groove curvature coefficient of the inner ring is 0.51Dw, and the groove curvature coefficient of the outer ring is 0.515Dw.

[0012] Preferably, the radial clearance of the high-sealing bearing is 24–38 μm.

[0013] Preferably, the surface roughness of both the outer surface of the inner ring and the inner surface of the outer ring is no greater than 0.08 μm.

[0014] In summary, the advantages of this utility model are as follows: The sealing ring formed by the body, outer lip, and inner lip, relying on the first sealing lip abutting against the step and the second sealing lip abutting against the retaining edge, achieves double sealing, ensuring complete isolation between the bearing's internal and external environments. This prevents external media from entering and internal media from leaking, improving the bearing's sealing performance. This allows the entire bearing to meet the high-efficiency, long-life operation requirements of the motor, enhancing its performance. Furthermore, by reducing grease loss and contamination wear, the overall service life of the bearing is extended. Secondly, the sealing ring formed by the body, outer lip, and inner lip has a compact structure, facilitating installation and disassembly. The metal plate provides rigidity and strength support for the sealing ring, ensuring the entire sealing component maintains its correct shape and position during installation and use, resisting deformation, and further improving sealing performance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a high-sealing bearing according to the present invention; Figure 2 for Figure 1 A magnified view of part A in the image; Figure 3 This is a schematic diagram of the sealing element in this utility model.

[0016] Figure label: 1 Outer ring, 11 First annular groove, 2 Inner ring, 21 Second annular groove, 22 Step, 23 Side flange, 3 Ball bearing, 4 Cage, 41 Ball pocket, 5 Seal, 51 Metal plate, 510 Vertical part, 511 Horizontal part, 512 Rounded chamfer, 52 Sealing ring, 53 Body, 54 Inner lip, 541 First sealing lip, 5411 First lip edge, 5412 Second lip edge, 542 Second sealing lip, 55 Outer lip. Detailed Implementation

[0017] like Figure 1 , Figure 2 and Figure 3 As shown, a high-sealing bearing includes an outer ring 1, an inner ring 2, and balls 3. A cage 4 for mounting the balls 3 is provided between the outer ring 1 and the inner ring 2. The outer ring 1 has a first annular groove 11, and the inner ring 2 has a second annular groove 21. A seal 5 is installed between the first annular groove 11 and the second annular groove 21. The second annular groove 21 includes a step 22 and a retaining edge 23. The seal 5 includes a metal plate 51 and a sealing ring 52 disposed on the metal plate 51. The sealing ring 52 includes a body 53 and an inner lip 54 and an outer lip 55 respectively disposed at both ends of the body 53. The outer lip 55 is installed in the first annular groove 11, and the inner lip 54 is installed in the second annular groove 21. The inner lip 54 includes a first sealing lip 541 that abuts against the step 22 and a second sealing lip 542 that abuts against the retaining edge 23.

[0018] The sealing ring 52 formed by the body 53, outer lip 55, and inner lip 54 achieves double sealing by relying on the first sealing lip 541 abutting against the step 22 and the second sealing lip 542 abutting against the retaining edge 23. This ensures complete isolation between the bearing's interior and exterior environments, preventing external media from entering and internal media from leaking, thus improving the bearing's sealing performance. This allows the entire bearing to meet the high-efficiency and long-life operation requirements of the motor, enhancing its performance. Furthermore, the reduced grease loss and contamination wear extend the overall service life of the bearing. Additionally, the sealing ring 52 formed by the body 53, outer lip 55, and inner lip 54 has a compact structure, facilitating installation and disassembly. The metal plate 51 provides rigidity and strength support for the sealing ring 52, ensuring the entire sealing element 5 maintains its correct shape and position during installation and use, resisting deformation, and further improving sealing performance.

[0019] The first sealing lip 541 includes a first lip edge 5411 that abuts against the horizontal step surface of the step 22, and a second lip edge 5412 that abuts against the vertical step surface of the step 22. The first sealing lip 541 is an integral structure. The axial sealing between the first sealing lip 541 and the step 22 is achieved by the first lip edge 5411 abutting against the horizontal step surface of the step 22, and the radial sealing between the first sealing lip 541 and the step 22 is achieved by the second lip edge 5412 abutting against the vertical step surface of the step 22. This achieves a double seal between the first sealing lip 541 and the step 22, improving the sealing reliability by 30-50%. In addition, setting the first sealing lip 541 as an integral structure simplifies the installation process between the first lip edge 5411 and the second lip edge 5412, improves the structural strength of the entire first sealing lip 541, and improves the installation efficiency of the entire sealing ring 52. The sealing ring 52 is a rubber sealing ring, and the sealing ring 52 is an integral structure. By making the sealing ring 52 a rubber sealing ring, the excellent elasticity and extensibility of rubber ensure that the sealing ring 52 can tightly fit the first annular groove 11 and the second annular groove 21, improving sealing performance. Secondly, the rubber sealing ring 52 improves the stability of the entire sealing ring 52, extending its overall service life. Furthermore, the integral structure of the sealing ring 52 ensures continuous and complete contact, avoiding gaps between the body 53, inner lip 54, and outer lip 55, further improving the sealing performance of the entire sealing ring 52. Additionally, it prevents the sealing ring 52 from falling off or shifting during operation, enhancing reliability. Finally, it simplifies the installation structure between the sealing ring 52 and the metal plate 51, improving installation efficiency, and the sealing ring 52 is less prone to deformation during installation, extending its service life. The metal plate 51 includes a vertical portion 510 and a horizontal portion 511. The horizontal portion 511 is located at the top of the vertical portion 510, and a rounded chamfer 512 is provided between the horizontal portion 511 and the vertical portion 510. This structure of vertical portion 510 and horizontal portion 511 increases the contact area between the metal plate 51 and the sealing ring 52, improving the fixing quality of the sealing ring 52. Furthermore, the rounded chamfer 512 ensures that the metal plate 51 can evenly support the sealing ring 52, improving the sealing performance of the entire sealing element 5. It also improves the installation efficiency of the sealing ring 52 and the metal plate 51, preventing damage to the sealing ring 52 during installation. The metal plate 51 is a one-piece structure, which simplifies the installation process between the vertical portion 510 and the horizontal portion 511 and improves the overall installation strength of the metal plate 51.

[0020] The inner ring 2 is made of high-carbon chromium bearing steel, and the outer ring 1 is also made of high-carbon chromium bearing steel. Using high-carbon chromium bearing steel for both the inner and outer rings effectively improves the overall wear resistance, corrosion resistance, and contact fatigue strength of the bearing, thereby increasing its service life and performance. Furthermore, high-carbon chromium bearing steel exhibits minimal deformation during heat treatment, which helps maintain the bearing's dimensional accuracy and shape stability. The cage 4 has ball pockets 41 for mounting the balls 3. The specific cage design is based on existing technology, and its exact structure is not described in detail in this embodiment. This design better guides the balls and significantly reduces noise. The groove curvature coefficient of the inner ring 2 is 0.51Dw, and that of the outer ring 1 is 0.515Dw, which balances the contact stress distribution between the inner and outer rings, thus extending fatigue life.

[0021] The radial clearance of the high-seal bearing is 24–38 μm. Setting the radial clearance of the entire high-seal bearing to 24–38 μm effectively reduces bearing noise, improves operational comfort and stability, and increases bearing rigidity, load-bearing capacity, and service life. It also ensures improved rotational accuracy during normal operation. When the radial clearance of the high-seal bearing is less than 24 μm, rotational accuracy cannot be guaranteed, increasing friction and wear, and compromising operational smoothness. When the radial clearance is greater than 38 μm, the bearing noise is excessive during operation. The surface roughness of the outer surface of the inner ring 2 and the inner surface of the outer ring 1 are both no greater than 0.08 μm, improving the overall bearing precision and thus reducing frictional torque during operation. Furthermore, it avoids stress concentration, increases rolling contact fatigue life by 20–30%, improves the overall bearing service life, and allows for a tighter fit with the seal 5, enhancing the sealing effect of the seal 5.

[0022] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined by the appended claims.

Claims

1. A high-sealing bearing, comprising an outer ring, an inner ring, and balls, wherein a cage for mounting the balls is provided between the outer ring and the inner ring, the outer ring has a first annular groove, the inner ring has a second annular groove, and a seal is installed between the first annular groove and the second annular groove, characterized in that: The second annular groove includes a step and a retaining edge. The sealing element includes a metal plate and a sealing ring disposed on the metal plate. The sealing ring includes a body and an inner lip and an outer lip disposed at both ends of the body. The outer lip is installed in the first annular groove, and the inner lip is installed in the second annular groove. The inner lip includes a first sealing lip that abuts against the step and a second sealing lip that abuts against the retaining edge.

2. The high-sealing bearing according to claim 1, characterized in that: The first sealing lip includes a first lip edge that abuts against the horizontal step surface of the step, and a second lip edge that abuts against the vertical step surface of the step. The first sealing lip is an integral structure.

3. A high-sealing bearing according to claim 2, characterized in that: The sealing ring is a rubber sealing ring, and the sealing ring is an integral structure.

4. A high-sealing bearing according to claim 1, characterized in that: The metal plate includes a vertical part and a horizontal part, the horizontal part is located at the top of the vertical part, and a rounded chamfer is provided between the horizontal part and the vertical part.

5. A high-sealing bearing according to claim 4, characterized in that: The metal plate is a one-piece structure.

6. A high-sealing bearing according to claim 1, characterized in that: The inner ring is made of high-carbon chromium bearing steel, and the outer ring is made of high-carbon chromium bearing steel.

7. A high-sealing bearing according to claim 1, characterized in that: The cage is provided with ball pockets for mounting balls.

8. A high-sealing bearing according to claim 1, characterized in that: The inner ring has a groove curvature coefficient of 0.51Dw, and the outer ring has a groove curvature coefficient of 0.515Dw.

9. A high-sealing bearing according to claim 1, characterized in that: The radial clearance of high-sealing bearings is 24–38 μm.

10. A high-sealing bearing according to claim 1, characterized in that: The surface roughness of both the outer surface of the inner ring and the inner surface of the outer ring is no greater than 0.08 μm.

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