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CN-224229106-U - Seal assembly and bearing assembly

CN224229106UCN 224229106 UCN224229106 UCN 224229106UCN-224229106-U

Abstract

The present disclosure relates to a seal assembly and a bearing assembly. The sealing assembly comprises a sealing body, wherein a main sealing lip is arranged at the radial inner end of the sealing body and inclines towards one axial side and the radial inner side of the sealing body, the main sealing lip is provided with a contact sealing section with a preset axial length, and the radial inner surface of the contact sealing section forms a contact sealing surface. The contact sealing section with longer axial direction increases the contact area between the main sealing lip and the bearing inner ring, forms a longer sealing interface, can more effectively block the invasion of external liquid coolant (such as cutting fluid, water and the like), and reduces the leakage risk. Meanwhile, the contact pressure can be effectively dispersed, the friction coefficient is reduced, the friction torque is reduced, and the wear resistance and the service life of the contact sealing surface of the contact sealing section of the sealing body are improved.

Inventors

  • LIU XIN
  • WU LIJUAN
  • HE SICHUAN
  • LI SHIJING
  • LU NAN

Assignees

  • 舍弗勒技术股份两合公司

Dates

Publication Date
20260512
Application Date
20250417

Claims (9)

  1. 1. A seal assembly (100) comprising a seal body (10), A main sealing lip (11) is arranged at the radial inner end of the sealing body (10), the main sealing lip (11) inclines towards one axial side and the radial inner side of the sealing body (10), wherein the main sealing lip (11) is provided with a contact sealing section (111) with a preset axial length, the radial inner surface of the contact sealing section (111) forms a contact sealing surface (112), The sealing body (10) is integrally formed by machining thermoplastic polyurethane rubber materials.
  2. 2. The seal assembly (100) of claim 1, wherein, The contact sealing surface (112) is provided with a plurality of circles of first grooves (113) which are arranged at intervals along the axial direction (A).
  3. 3. The seal assembly (100) of claim 1, wherein, The sealing assembly (100) comprises a first spring ring (21) and a second spring ring (22), the first spring ring (21) and the second spring ring (22) are tightly sleeved on the radial outer wall of the contact sealing section (111) of the main sealing lip (11), The second spring ring (22) is located at one axial end of the main sealing lip (11), and the inner diameter of the first spring ring (21) is larger than that of the second spring ring (22) and is located at the other axial end of the main sealing lip (11).
  4. 4. The seal assembly (100) of claim 3, wherein, The cross-sectional diameter of the first spring ring (21) is greater than the cross-sectional diameter of the second spring ring (22).
  5. 5. The seal assembly (100) of claim 3, wherein, The radially outer wall of the contact seal section (111) of the main seal lip (11) is provided with two fixing grooves (114) for mounting the first spring ring (21) and the second spring ring (22), respectively.
  6. 6. The seal assembly (100) of claim 1, wherein, The inner radial end of the sealing body (10) is provided with a secondary sealing lip (12), the secondary sealing lip (12) is positioned on the other axial side of the primary sealing lip (11), and the secondary sealing lip (12) is inclined towards the other axial side and the inner radial side of the sealing body (10).
  7. 7. The seal assembly (100) of claim 6, wherein, The sealing body (10) comprises an axial first end face (15) and an axial second end face (14), and the primary sealing lip (11) and the secondary sealing lip (12) are axially located within an axial length range between the axial first end face (15) and the axial second end face (14).
  8. 8. The seal assembly (100) of claim 1, wherein, The radially outer wall of the sealing body (10) is provided with a plurality of circular second grooves (16) arranged side by side in the axial direction.
  9. 9. A bearing assembly, comprising: an inner ring (300); an outer ring (200); A seal ring (400), the seal ring (400) being provided on one axial side of the outer ring (200) and forming a clamping groove (401) together with an axial end face of the outer ring (200), and The seal assembly (100) of any one of claim 1 to 8, The radial outer end of the sealing assembly (100) is clamped in the clamping groove (401) along the axial direction and is in torsion-resistant connection with the outer ring (200), the main sealing lip (11) is in interference fit with the outer wall of the inner ring (300) and forms dynamic sealing abutting joint, and the secondary sealing lip (12) is in abutting joint or clearance fit with the outer wall of the inner ring (300).

Description

Seal assembly and bearing assembly Technical Field The utility model relates to the technical field of bearing sealing, in particular to a sealing assembly and a bearing assembly. Background FIG. 1 illustrates a typical seal assembly for a rotating shaft applied to a cold rolling mill bearing. The seal assembly includes a skeleton 30 made of metal and a rubber member 40 attached thereto by a vulcanization process. The rubber member generally includes a primary seal lip 41 provided with a spring 50 mainly for preventing an external liquid coolant from penetrating into the bearing interior, and a secondary seal lip 42 for preventing grease leakage from the bearing interior. Such seal assemblies are often difficult to manufacture due to their large diameter, resulting in increased manufacturing costs. In addition, the customer's demand for such specific seal assemblies is relatively low, and thus, the cost of a single seal assembly is significantly increased by specially making expensive molds for small quantities of product, and the high mold development costs are shared among small quantities of product, resulting in a significant increase in the cost of each seal assembly. For this reason, there is a need for a seal assembly that is easy to manufacture and that is low in cost. Disclosure of utility model To overcome the problems in the related art, the present disclosure provides a seal assembly and a bearing assembly. According to a first aspect of embodiments of the present disclosure, the present disclosure provides a seal assembly, comprising a seal body, a radially inner end of the seal body being provided with a main seal lip, the main seal lip being inclined towards an axial side and a radial inner side of the seal body, wherein the main seal lip has a contact seal segment of a preset axial length, a radially inner surface of the contact seal segment forming a contact seal face. In some embodiments, the seal body is integrally formed by machining a thermoplastic polyurethane rubber material. In some embodiments, the contact sealing surface is provided with a plurality of axially spaced turns of the first groove. In some embodiments, the seal assembly comprises a first spring ring and a second spring ring compressively nested on a radially outer wall of the contact seal segment of the primary seal lip, wherein the second spring ring is located at one axial end of the primary seal lip, and the first spring ring has an inner diameter greater than an inner diameter of the second spring ring and is located at the other axial end of the primary seal lip. In some embodiments, the cross-sectional diameter of the first spring turn is greater than the cross-sectional diameter of the second spring turn. In some embodiments, the radially outer wall of the contact seal segment of the primary seal lip is provided with two securing grooves for mounting the first and second coils, respectively. In some embodiments, a radially inner end of the seal body is provided with a secondary sealing lip on the other axial side of the primary sealing lip, the secondary sealing lip being inclined towards the other axial side and radially inward side of the seal body. In some embodiments, the seal body includes an axial first end face and an axial second end face, the primary seal lip and the secondary seal lip being axially located within an axial length range between the axial first end face and the axial second end face. In some embodiments, the radially outer wall of the sealing body is provided with a plurality of circular second grooves arranged side by side in the axial direction. According to a second aspect of an embodiment of the present disclosure, there is provided a bearing assembly comprising an inner ring, an outer ring, a seal ring disposed on an axial side of the outer ring and forming a clamping groove, and a seal assembly according to the first aspect, wherein a radially outer end of the seal assembly is axially clamped within the clamping groove and torsionally connected with the outer ring, the primary seal lip is in interference fit with and forms a dynamic seal with an outer wall of the inner ring, and the secondary seal lip is in abutment or clearance fit with the outer wall of the inner ring. The technical scheme provided by the embodiment of the disclosure can have the beneficial effects that the contact area between the main sealing lip and the bearing inner ring is increased by the axially longer contact sealing section, so that a longer sealing interface is formed, the invasion of external liquid coolant (such as cutting fluid, water and the like) can be more effectively blocked, and the leakage risk is reduced. Meanwhile, the contact pressure can be effectively dispersed, the friction coefficient is reduced, the friction torque is reduced, and the wear resistance and the service life of the contact sealing surface of the contact sealing section of the sealing body are improved. Drawings The accompany