Combined sealing structure of bearing

Abstract

The utility model discloses a combined sealing structure of a bearing, which comprises a first sealing ring fixedly arranged on an outer ring of the bearing and an L-shaped second sealing ring fixedly arranged on an inner ring of the bearing, a gap is arranged between the second sealing ring and the outer ring of the bearing, and a sealing layer is adhered on one side of the first sealing ring facing the second sealing ring. A transverse sealing lip is integrally arranged in the middle of the sealing layer and abuts against the longitudinal face of the second sealing ring, a longitudinal sealing lip is arranged at the end of the sealing layer and abuts against the transverse face of the second sealing ring, and a first sealing cavity is formed among the longitudinal sealing lip, the transverse sealing lip and the longitudinal face of the second sealing ring. A magnetic check ring is embedded in the second sealing ring; the utility model has the advantages that effective dust prevention and sealing can be realized, a magnetic field environment can be formed, and an externally matched motor rotor can reach a high running speed.

Description

Technical Field

[0001] The utility model relates to the field of bearing sealing structures, in particular to a combined sealing structure of a bearing. Background Art

[0002] The bearing seal structure is a key factor affecting bearing life and performance. Existing bearing sealing technology typically uses a combination of inner and outer seals to prevent the intrusion of dust, mud, and impurities. However, during use, dust, impurities, and mud that enter between the seals can easily enter the bearing interior and are difficult to remove.

[0003] Chinese utility model patent number CN202520789U discloses a dual-seal ring combined seal structure with an axial lip. The structure comprises an inner seal ring and an outer seal ring, forming a sealed cavity between the inner and outer seal rings. An upward-extending axial light-contact sealing lip is provided in the middle of the back of the inner seal ring, contacting the outer seal ring. While this utility model's axial light-contact sealing lip prevents the intrusion of external mud and dust, facilitating the removal of any intruded mud and dust, thus extending the life and reliability of the seal, it fails to create a magnetic field, hindering the high operating speeds of the externally coupled motor rotor. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a combined sealing structure of a bearing, which can not only realize effective dustproofing and sealing, but also form a magnetic field environment, which is conducive to the external matching motor rotor to achieve high operating speed.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a combined sealing structure of a bearing, comprising a first sealing ring fixedly mounted on the outer ring of the bearing and an L-shaped second sealing ring fixedly mounted on the inner ring of the bearing, a gap being arranged between the second sealing ring and the outer ring of the bearing, a sealing layer being bonded to the side of the first sealing ring facing the second sealing ring, a transverse sealing lip being integrally arranged on the middle part of the sealing layer, the transverse sealing lip being abutted against the longitudinal surface of the second sealing ring, a longitudinal sealing lip being arranged on the end part of the sealing layer, the longitudinal sealing lip being abutted against the transverse surface of the second sealing ring, a first sealing cavity being formed between the longitudinal sealing lip, the transverse sealing lip and the longitudinal surface of the second sealing ring; a magnetic retaining ring being embedded in the second sealing ring.

[0006] Furthermore, the transverse sealing lip is arranged at an angle.

[0007] Furthermore, the longitudinal sealing lip has an inverted Y structure and forms a second sealing cavity between the longitudinal sealing lip and the transverse surface of the second sealing ring.

[0008] Furthermore, the second sealing ring is designed as a double layer, one layer is a metal layer, and the other layer is a rubber layer, and the transverse surface of the metal layer is fixed to the inner ring of the bearing.

[0009] Compared with the existing technology, the advantage of the present invention is that two sealed cavities are formed through the special shape design of the sealing layer, which effectively improves the dustproof and sealing effects; in addition, a magnetic retaining ring is embedded in the second sealing ring, which can form a magnetic field, contributes to the efficient operation of the motor rotor, and is beneficial for the external matching motor rotor to achieve a high operating speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 for Figure 1 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0012] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1-2 As shown, a combined sealing structure of a bearing comprises a first sealing ring 3 fixedly mounted on the bearing outer ring 1 and an L-shaped second sealing ring 4 fixedly mounted on the bearing inner ring 2. The second sealing ring 4 is a double-layer design, one layer being a metal layer 42 and the other being a rubber layer 41. The transverse surface 422 of the metal layer 42 is fixed to the bearing inner ring 2. Both the metal layer 42 and the rubber layer 41 are embedded with magnetic retaining rings, thereby forming a magnetic field, which helps the high-speed operation of the externally matched motor rotor. A gap is provided between the second sealing ring 4 and the bearing outer ring 1. During the use of the bearing, impurities will pass through the gap and fall between the first sealing ring 3 and the second sealing ring 4. The first sealing ring 3 is bonded with a sealing layer 5 on the side facing the second sealing ring 4. An inclined transverse sealing lip 51 is provided in the middle of the sealing layer 5. When the bearing rotates at high speed, a gap is provided. The centrifugal force and the inclined transverse sealing lip 51 provide a guiding effect, so that impurities entering between the first sealing ring 3 and the second sealing ring 4 are more easily thrown out, and the transverse sealing lip 51 is against the longitudinal surface 421 of the second sealing ring 4. The end of the sealing layer 5 is provided with a longitudinal sealing lip 52, which is in the shape of an inverted Y. A first sealing cavity 6 is formed between the longitudinal sealing lip 52, the transverse sealing lip 51 and the longitudinal surface 421 of the second sealing ring 4. The first sealing cavity 6 can prevent external impurities from invading the interior of the bearing. At the same time, a small amount of lubricating grease is contained in the first sealing cavity 6, which can effectively slow down the dry friction between the sealing layer 5 and the second sealing ring 4, thereby extending the service life. The longitudinal sealing lip 52 is against the transverse surface 422 of the second sealing ring 4, thereby forming a second sealing cavity 7. Such a double sealing design makes the sealing and dustproof effects more obvious.

[0014] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention is based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field fall within the protection scope of the present invention.

Claims

1. A combined sealing structure for a bearing, comprising a first sealing ring fixedly mounted on a bearing outer ring and an L-shaped second sealing ring fixedly mounted on a bearing inner ring, wherein a gap is provided between the second sealing ring and the bearing outer ring, and characterized in that: The first sealing ring is bonded with a sealing layer on the side facing the second sealing ring, and a transverse sealing lip is integrally provided in the middle of the sealing layer, and the transverse sealing lip is in abutment against the longitudinal surface of the second sealing ring. The end of the sealing layer is provided with a longitudinal sealing lip, and the longitudinal sealing lip is in abutment against the transverse surface of the second sealing ring. A first sealing cavity is formed between the longitudinal sealing lip, the transverse sealing lip and the longitudinal surface of the second sealing ring; and a magnetic retaining ring is embedded in the second sealing ring.

2. The combined sealing structure of a bearing according to claim 1, characterized in that: The transverse sealing lip is arranged obliquely.

3. The combined sealing structure of a bearing according to claim 1, characterized in that: The longitudinal sealing lip is in an inverted Y structure and forms a second sealing cavity between the longitudinal sealing lip and the transverse surface of the second sealing ring.

4. The combined sealing structure of a bearing according to claim 1, characterized in that: The second sealing ring is designed as a double layer, one layer is a metal layer, and the other layer is a rubber layer. The transverse surface of the metal layer is fixed to the inner ring of the bearing.

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