CN217633491U

CN217633491U - Sealing ring for bearing and bearing

Info

Publication number: CN217633491U
Application number: CN202220489356.6U
Authority: CN
Inventors: 蒋兴奇; 陆柳; 朱颖
Original assignee: Shanghai Aodema Electromechanical Technology Co ltd
Current assignee: Shanghai Aodema Electromechanical Technology Co ltd
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-10-21
Anticipated expiration: 2032-03-08

Abstract

The utility model discloses a sealing washer and bearing for bearing, sealing washer are used for the cover to locate between the bearing inner race and the bearing inner race of bearing, and the sealing washer has conductive structure, and conductive structure sets to: the bearing inner ring, the sealing ring and the bearing outer ring can be sequentially and electrically conducted to form a conductive loop. The conductive loop formed by sequentially electrically conducting the bearing inner ring, the sealing ring and the bearing outer ring and the loop formed by sequentially electrically conducting the bearing inner ring, the steel ball and the bearing outer ring are parallel loops, and the shaft current on the loop formed by sequentially electrically conducting the bearing inner ring, the steel ball and the bearing outer ring is shunted, so that the damage of the shaft current to the metal raceway surface and the steel ball surface of the bearing is reduced, and the probability of electric corrosion on the metal raceway surface and the steel ball surface of the bearing is reduced.

Description

Sealing ring for bearing and bearing

Technical Field

The utility model relates to a bearing seal technical field, in particular to a sealing washer and bearing for bearing.

Background

For the bearing with the sealing ring, a motor applies a potential difference called as 'shaft voltage' between an inner ring and an outer ring of the bearing, a bearing raceway grease oil film is broken down under certain specific conditions in the operation process, shaft current (discharge current, namely electric spark machining current) is generated, damage is caused to the surface of a metal raceway and the surface of a steel ball of the bearing, electric erosion is formed after the damage is accumulated, and finally the bearing generates abnormal sound. The surface of a metal raceway of a motor bearing of the household appliance and the surface of a steel ball generate electric corrosion, so that environmental noise pollution is caused, and the physical and psychological health of consumers is influenced. If the internal rolling surfaces of the bearing of a drive motor or a traction motor of a transport vehicle are subject to galvanic corrosion, the life of a consumer may be endangered.

Therefore, the metal raceway surface and the steel ball surface of the bearing with the sealing ring in the prior art have the problem of forming electric corrosion due to the breakdown and damage of the shaft current.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the metal raceway surface and the steel ball surface of the bearing with the sealing ring in the prior art are damaged by shaft current breakdown to form electric corrosion.

In order to solve the above problem, an embodiment of the present invention discloses a sealing ring for a bearing, the sealing ring is used for the cover to locate between the bearing inner race and the bearing outer race of bearing, and the sealing ring has a conductive structure, and the conductive structure sets to: the bearing inner ring, the sealing ring and the bearing outer ring can be sequentially and electrically conducted to form a conductive loop.

By adopting the technical scheme, the shaft current generated by the shaft voltage applied between the bearing inner ring and the bearing outer ring of the bearing by the motor can damage the metal raceway surface and the steel ball surface of the bearing, and the electric erosion can be formed after the damage is accumulated. The conductive structure of the sealing ring is respectively electrically connected with the bearing inner ring and the bearing outer ring, so that the bearing inner ring, the sealing ring and the bearing outer ring can be sequentially and electrically conducted to form a conductive loop. The conductive loop formed by sequentially electrically conducting the bearing inner ring, the sealing ring and the bearing outer ring and the loop formed by sequentially electrically conducting the bearing inner ring, the steel ball and the bearing outer ring are parallel loops, and the shaft current on the loop formed by sequentially electrically conducting the bearing inner ring, the steel ball and the bearing outer ring is shunted, so that the damage of the shaft current to the metal raceway surface and the steel ball surface of the bearing is reduced, and the probability of electric corrosion on the metal raceway surface and the steel ball surface of the bearing is reduced.

Furthermore, the utility model discloses an embodiment also discloses a sealing washer for bearing, the sealing washer includes the sealing washer body that has the body conductive part, the internal diameter face of sealing washer body and/or the external diameter face of sealing washer body are provided with the seal lip that has the lip conductive part, lip conductive part and body conductive part constitute a part of electrically conductive structure respectively; the sealing lip positioned on the inner diameter surface of the sealing ring body is electrically connected between the body conductive part of the sealing ring body and the bearing inner ring through the corresponding lip conductive part; the seal lip located on the outer diameter surface of the seal ring body is electrically connected between the body conductive part of the seal ring body and the bearing outer ring through the corresponding lip conductive part.

By adopting the technical scheme, the sealing ring body with the body conductive part and the sealing lip with the lip conductive part can prevent external dust and impurities from entering the inside of the bearing and prevent lubricating grease in the inside of the bearing from leaking so as to realize the sealing function. The bearing inner ring, the sealing ring and the bearing outer ring can be sequentially electrically conducted to form a conductive loop so as to realize the function of electric conduction.

Furthermore, the embodiment of the present invention also discloses a seal ring for a bearing, wherein the seal lip comprises a first elastic body and a first conductive strip, and the first conductive strip constitutes a lip conductive part; the first conductive strips are distributed in the first elastic bodies in a centralized way, or the first conductive strips are uniformly distributed in the first elastic bodies; in the sealing lip positioned on the inner diameter surface of the sealing ring body, one end of the first conductive strip is electrically connected with the conductive part of the body, so that the sealing lip is electrically connected with the inner diameter surface of the sealing ring body, and the other end of the first conductive strip is electrically connected with the outer diameter surface of the bearing inner ring; and/or one end of the first conductive strip is electrically connected with the conductive part of the body in the sealing lip positioned on the outer diameter surface of the sealing ring body, so that the sealing lip is electrically connected with the outer diameter surface of the sealing ring body, and the other end of the first conductive strip is electrically connected with the inner diameter surface of the bearing outer ring.

By adopting the technical scheme, the first conductive strip can form the conductive beam in the sealing lip, the conductive beam enables the sealing lip to have conductivity, the sealing lip with conductivity is electrically connected between the sealing ring body and the bearing inner ring and/or between the sealing ring body and the bearing outer ring, and the bearing inner ring, the sealing ring and the bearing outer ring are sequentially and electrically conducted to form a conductive loop so as to realize the function of electric conduction.

Furthermore, the embodiment of the utility model also discloses a sealing ring for a bearing, which comprises a first elastic body and a sealing lip of a first conductive bar, wherein the sealing lip is a contact sealing lip; in the contact sealing lip positioned on the inner diameter surface of the sealing ring body, the contact sealing lip is arranged to be in contact with the outer diameter surface of the bearing inner ring, so that the other end of the first conductive strip is electrically connected with the outer diameter surface of the bearing inner ring; and/or, in the contact seal lip located on the outer diameter surface of the seal ring body, the contact seal lip is arranged to be in contact with the inner diameter surface of the bearing outer ring, so that the other end of the first conductive strip is electrically connected with the inner diameter surface of the bearing outer ring.

By adopting the technical scheme, one end of the conductive contact seal lip can be directly contacted with the outer diameter surface of the bearing inner ring and/or the inner diameter surface of the bearing outer ring to form electric connection, and the other end of the conductive contact seal lip is electrically connected with the seal ring body, so that the bearing inner ring, the seal ring and the bearing outer ring are sequentially electrically conducted to form a conductive loop so as to realize the function of electric conduction.

Furthermore, the embodiment of the utility model also discloses a sealing ring for a bearing, which comprises a first elastic body and a sealing lip of a first conductive bar, wherein the sealing lip is a non-contact sealing lip; one end of the non-contact sealing lip, which is far away from the sealing ring body, is provided with a plurality of extending parts which are arranged at intervals along the circumferential direction of the non-contact sealing lip; the extension part comprises an extension part elastic body and extension part conductive strips, the extension part conductive strips are intensively or uniformly distributed in the extension part elastic body, and the extension part conductive strips also form a part of the conductive structure; in the non-contact sealing lip positioned on the inner diameter surface of the sealing ring body, the other end of the first conducting strip is electrically connected with the outer diameter surface of the bearing inner ring through the conducting strip of the extension part; in the non-contact sealing lip located on the outer diameter surface of the sealing ring body, the other end of the first conducting strip is electrically connected with the inner diameter surface of the bearing outer ring through the conducting strip of the extending part.

By adopting the technical scheme, the non-contact seal lip with conductivity can be in contact with the outer diameter surface of the bearing inner ring through the extension part and/or in contact with the inner diameter surface of the bearing outer ring to form electric connection, and the other end of the non-contact seal lip is electrically connected with the seal ring body, so that the bearing inner ring, the seal ring and the bearing outer ring are sequentially electrically conducted to form a conductive loop so as to realize the function of electric conduction.

Further, the utility model discloses an embodiment also discloses a sealing washer for bearing, the sealing washer body includes the second elastomer, second busbar and sealing washer body skeleton, the second busbar is concentrated and is distributed in the second elastomer, or evenly distributed in the second elastomer, and the second busbar has the interior tip that is located the internal diameter face position department of sealing washer body, and the outer tip that is located the external diameter face position department of sealing washer body, interior tip and external end electricity are connected, sealing washer body skeleton is inlayed and is located in the second elastomer, sealing washer body skeleton sets up along the radial of sealing washer, the material of sealing washer body skeleton is the metal; the second conductive strip forms a body conductive part, or/and the second conductive strip and the seal ring body framework together form the body conductive part; when the inner diameter surface of the sealing ring body is electrically connected with the outer diameter surface of the bearing inner ring through the corresponding sealing lip, the inner end part of the second conducting strip is electrically connected with one end of the first conducting strip in the corresponding sealing lip; when the inner diameter surface of the sealing ring body is directly and electrically connected with the outer diameter surface of the bearing inner ring, the inner end part of the second conductive strip is electrically connected with the outer diameter surface of the bearing inner ring; when the outer diameter surface of the sealing ring body is electrically connected with the inner diameter surface of the bearing outer ring through the corresponding sealing lip, the outer end part of the second conducting strip is electrically connected with one end of the first conducting strip in the corresponding sealing lip; when the outer diameter surface of the sealing ring body is directly electrically connected with the inner diameter surface of the bearing outer ring, the outer end part of the second conductive strip is electrically connected with the inner diameter surface of the bearing outer ring.

By adopting the technical scheme, the framework of the sealing ring body has conductivity, the second conductive strip can form a conductive beam in the sealing ring body, the conductive beam enables the sealing ring body to have conductivity, the inner diameter surface of the conductive sealing ring body is electrically connected with the bearing inner ring through the sealing lip or directly electrically connected with the bearing inner ring, the outer diameter surface of the sealing ring body is electrically connected with the bearing outer ring through the sealing lip or directly electrically connected with the bearing outer ring, and the bearing inner ring, the sealing ring and the bearing outer ring are sequentially electrically conducted to form a conductive loop so as to realize the function of electrical conduction.

Further, the utility model discloses an embodiment still discloses a sealing washer for bearing, and the second busbar is concentrated in one side of sealing washer body skeleton along the axial of sealing washer, and the second busbar is along the radial extension of sealing washer for the second busbar is the stripe structure, and a tip of stripe structure constitutes the interior tip of second busbar, and the other end of stripe structure constitutes the outer tip of second busbar.

By adopting the technical scheme, the conductive bundles formed by the second conductive strips are intensively distributed on one side of the framework of the sealing ring body along the axial direction of the sealing ring, the inner end parts of the second conductive strips are electrically connected with the bearing inner ring through the sealing lips or directly electrically connected with the bearing inner ring, the outer end parts of the second conductive strips are electrically connected with the bearing outer ring through the sealing lips or directly electrically connected with the bearing outer ring, and the bearing inner ring, the sealing ring and the bearing outer ring are sequentially electrically conducted to form a conductive loop so as to realize the function of electric conduction.

Further, the utility model discloses an embodiment has still disclosed a sealing washer for bearing, the second busbar includes interior busbar and the outer busbar that sets up along the radial direction interval of sealing washer, the one end that interior busbar deviates from outer busbar constitutes the interior tip of second busbar, the one end that outer busbar deviates from interior busbar constitutes the outer tip of second busbar, interior busbar passes through sealing washer body skeleton and is connected with outer busbar electricity for the interior tip of second busbar is connected with outer tip electricity.

By adopting the technical scheme, one end of the inner conductive strip is electrically connected with one end of the outer conductive strip through the seal ring body framework, the other end of the inner conductive strip is electrically connected with the bearing inner ring through the seal lip or is directly electrically connected with the bearing inner ring, the other end of the outer conductive strip is electrically connected with the bearing outer ring through the seal lip or is directly electrically connected with the bearing outer ring, and the bearing inner ring, the seal ring and the bearing outer ring are sequentially electrically conducted to form a conductive loop so as to realize the function of electrically conducting.

Furthermore, the embodiment of the utility model also discloses a sealing ring for a bearing, the first conducting strips and the second conducting strips are provided with a plurality of, the plurality of first conducting strips are arranged along the circumferential interval of the sealing lip, the plurality of second conducting strips are arranged along the circumferential interval of the sealing ring body; the first elastic body and the second elastic body are made of rubber or plastic; the first conductive strip and the second conductive strip are made of conductive magnetic powder, conductive carbon powder or conductive metal powder.

By adopting the technical scheme, when the first elastic body and the second elastic body are made of rubber, the first conductive strips and the second conductive strips are made of conductive magnetic powder, conductive carbon powder or conductive metal powder, so that the seal lip and the seal ring body have conductivity, and when the first elastic body and the second elastic body are made of plastic, the first conductive strips and the second conductive strips are made of conductive magnetic powder, conductive carbon powder or conductive metal powder, so that the seal lip and the seal ring body also have conductivity. The plurality of first conducting strips are arranged at intervals along the circumferential direction of the sealing lip and the plurality of second conducting strips are arranged at intervals along the circumferential direction of the sealing ring body, so that the shaft current can be increased to pass through a conductive loop formed by sequentially and electrically conducting the bearing inner ring, the sealing ring and the bearing outer ring, the damage of the shaft current to the metal rolling surface of the bearing is reduced, and the probability of electric corrosion on the metal raceway surface and the steel ball surface of the bearing is reduced.

Furthermore, the embodiment of the utility model also discloses a sealing ring for bearing, the sealing ring body and the sealing lip are formed integrally; the sealing lip is provided with a plurality of, and the first conducting strip is formed in at least one sealing lip.

By adopting the technical scheme, the sealing ring body and the sealing lip are integrally formed, so that the processing technology of the sealing ring can be reduced, and after the sealing ring body and the sealing lip are integrally formed, the position of the first conducting bar in the sealing lip is fixed; the position of the second conducting strip in the sealing ring body is fixed, the position of the conducting strip of the extending part in the extending part is fixed, the conducting beam formed by the first conducting strip and the second conducting strip or the conducting beam formed by the first conducting strip, the second conducting strip and the conducting strip of the extending part can enable the sealing ring to be electrically conducted with the bearing inner ring and the bearing outer ring to form a conducting loop, the damage of shaft current to the metal rolling surface of the bearing is reduced, and the probability of electric corrosion of the metal raceway surface and the steel ball surface of the bearing is reduced.

Further, the utility model discloses an embodiment has still disclosed a bearing, including bearing inner race, bearing inner race and set up the steel ball between bearing inner race and bearing inner race, be formed with annular gap between the internal diameter face of bearing inner race and the external diameter face of bearing inner race, annular gap is provided with the sealing washer along its axial both sides or unilateral, its characterized in that, the above-mentioned sealing washer that is used for the bearing of sealing washer adoption.

By adopting the technical scheme, the bearing inner ring, the sealing ring and the bearing outer ring can be sequentially and electrically conducted to form the conductive loop by adopting the structure of the sealing ring. The shaft current on the conductive loop formed by sequentially conducting the bearing inner ring, the steel ball and the bearing outer ring can be shunted, so that the damage of the shaft current to the metal raceway surface and the steel ball surface of the bearing is reduced, and the probability of electric corrosion on the metal raceway surface and the steel ball surface of the bearing is reduced.

Furthermore, the embodiment of the present invention further discloses a bearing, when only the inner diameter surface of the sealing ring body is provided with the sealing lip, the outer diameter surface of the sealing ring body and the inner diameter surface of the bearing outer ring are in interference fit, the inner diameter surface of the sealing ring body is electrically connected with the outer diameter surface of the bearing inner ring through the sealing lip, and the outer diameter surface of the sealing ring body is directly electrically connected with the inner diameter surface of the bearing outer ring; when only the outer diameter surface of the sealing ring body is provided with the sealing lip, the inner diameter surface of the sealing ring body is in interference fit with the outer diameter surface of the bearing inner ring, the outer diameter surface of the sealing ring body is electrically connected with the inner diameter surface of the bearing outer ring through the sealing lip, and the inner diameter surface of the sealing ring body is directly and electrically connected with the outer diameter surface of the bearing inner ring; when the inner diameter surface of the sealing ring body and the outer diameter surface of the sealing ring body are both provided with sealing lips, the inner diameter surface of the sealing ring body is electrically connected with the outer diameter surface of the bearing inner ring through the sealing lip positioned on the inner diameter surface of the sealing ring body, and the outer diameter surface of the sealing ring body is electrically connected with the inner diameter surface of the bearing outer ring through the sealing lip positioned on the outer diameter surface of the sealing ring body.

By adopting the technical scheme, a sealing lip is arranged between the inner diameter surface of the sealing ring body and the outer diameter surface of the bearing inner ring, or the sealing lip is arranged between the outer diameter surface of the sealing ring body and the inner diameter surface of the bearing outer ring, or the sealing lip is arranged between the inner diameter surface of the sealing ring body and the outer diameter surface of the bearing inner ring and between the outer diameter surface of the sealing ring body and the inner diameter surface of the bearing outer ring, the contact sealing lip of the sealing ring can be utilized, the non-contact sealing lip of the sealing ring can also be utilized, the contact sealing lip can also be added, the non-contact sealing lip can also be added, the bearing inner ring, the sealing ring and the bearing outer ring are sequentially electrically conducted to form a conductive loop, and the function of electrical conduction is realized.

Furthermore, the embodiment of the utility model also discloses a bearing, the position of the outer diameter surface of the bearing inner ring and/or the inner diameter surface of the bearing outer ring corresponding to the sealing lip is provided with a step-shaped sealing groove, and the sealing lip contacts with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the step-shaped sealing groove; or a groove-shaped sealing groove is formed in the position, corresponding to the sealing lip, of the outer diameter surface of the bearing inner ring and/or the inner diameter surface of the bearing outer ring, and the sealing lip is in contact with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the groove-shaped sealing groove.

By adopting the technical scheme, when the stepped sealing groove or the groove-shaped sealing groove is arranged at the position, corresponding to the sealing lip, of the outer diameter surface of the bearing inner ring and/or the inner diameter surface of the bearing outer ring, the sealing lip is contacted with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the stepped sealing groove, or the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the groove-shaped sealing groove, the bearing inner ring, the sealing ring body and the bearing outer ring are sequentially and electrically conducted to form a conductive loop.

The utility model has the advantages that:

Other features and corresponding advantages of the present invention are set forth in the following portion of the specification, and it should be understood that at least some of the advantages become apparent from the description of the present invention.

Drawings

Fig. 1 is a partial sectional view of a structure of a seal ring of a bearing according to embodiment 1 of the present invention;

fig. 2 is a partial sectional view of another structure of a seal ring of a bearing according to embodiment 1 of the present invention;

fig. 3 is a partial sectional view of still another structure of a seal ring of a bearing according to embodiment 1 of the present invention;

fig. 4a is a front view of a first structure of a seal ring for a bearing according to embodiment 1 of the present invention;

FIG. 4b is an enlarged view of the cross-section taken along the direction A-A in FIG. 4base:Sub>A, wherein the seal ring isbase:Sub>A contact seal ring, the second conductive strip and the seal ring body frame together formbase:Sub>A body conductive portion, and each seal lip is provided withbase:Sub>A conductive strip and is electrically connected directly bybase:Sub>A middle contact seal lip;

fig. 5a is a front view of a second structure of a seal ring for a bearing according to embodiment 1 of the present invention;

FIG. 5B is an enlarged cross-sectional view taken along the direction B-B in FIG. 5a, wherein the seal ring is a contact seal ring, the second conductive strip forms a conductive portion of the body, and the right non-contact seal lip is provided with a conductive strip electrically connected to the extension portion via the right non-contact seal lip;

fig. 6a is a front view of a third structure of a seal ring for a bearing according to embodiment 1 of the present invention;

FIG. 6b is an enlarged view of the cross-section taken along the direction C-C in FIG. 6a, wherein the seal ring is a contact seal ring, the second conductive strip and the seal ring body frame together form a body conductive portion, and each of the seal lips is provided with a conductive strip and electrically connected to the extension portion through the contact seal lip at the middle portion and the non-contact seal lip at the right portion;

fig. 7a is a front view of a fourth structure of a seal ring for a bearing according to embodiment 1 of the present invention;

FIG. 7b is an enlarged cross-sectional view taken along the direction D-D in FIG. 7a, in which the seal ring is a contact seal ring, the second conductive strip and the seal ring body skeleton together form a body conductive portion, and the non-contact seal lip on the right portion is provided with a conductive strip electrically connected to the extension portion through the right seal lip;

fig. 8a is a front view of a fifth structure of a seal ring for a bearing according to embodiment 1 of the present invention;

FIG. 8b is an enlarged view of the cross-section in the direction E-E of FIG. 8a, in which the seal ring is a contact seal ring, the second conductive strip and the seal ring body frame together form a body conductive part, and the left and middle seal lips are provided with conductive strips that are directly electrically connected by the middle contact seal lip;

fig. 9a is a front view of a sixth structure of a seal ring for a bearing according to embodiment 2 of the present invention;

FIG. 9b is an enlarged view of the section in the direction F-F of FIG. 9a, wherein the seal ring is a non-contact seal ring, the second conductive strip and the seal ring body frame together form a body conductive portion, and each of the seal lips is provided with a conductive strip and electrically connected to the extension portion through the non-contact seal lip in the middle;

fig. 10a is a front view of a seventh structure of a seal ring for a bearing according to embodiment 2 of the present invention;

FIG. 10b is an enlarged view of the section taken along the direction G-G in FIG. 10a, wherein the seal ring is a non-contact seal ring, the second conductive strip and the seal ring body skeleton together form a body conductive portion, and each of the seal lips is provided with a conductive strip and electrically connected to the extension portion through the non-contact seal lip at the middle portion;

fig. 11a is a front view of an eighth structure of a seal ring for a bearing according to embodiment 2 of the present invention;

FIG. 11b is an enlarged cross-sectional view taken along the direction H-H in FIG. 11a, in which the seal ring is a non-contact seal ring, the second conductive strip and the seal ring body skeleton together form a body conductive portion, and the right non-contact seal lip is provided with a conductive strip electrically connected to the extension portion via the right non-contact seal lip;

fig. 12a is a front view of a ninth structure of a seal ring for a bearing according to embodiment 2 of the present invention;

FIG. 12b is an enlarged cross-sectional view taken along the direction I-I in FIG. 12a, in which the seal ring is a non-contact seal ring, the second conductive strip and the seal ring body frame together form a body conductive portion, and the middle seal lip and the left seal lip are both provided with conductive strips electrically connected to the extension portion through the middle non-contact seal lip;

fig. 13 is a partial sectional view of a structure of a seal ring of a bearing according to embodiment 2 of the present invention;

fig. 14a is a partial cross-sectional view of a seal lip of a bearing with a seal ring according to embodiment 3 of the present invention contacting with a bottom surface of a stepped seal groove;

fig. 14b is a partial cross-sectional view of a seal lip of a bearing with a seal ring contacting with a side surface of a stepped seal groove according to embodiment 3 of the present invention;

fig. 14c is a partial cross-sectional view of a contact between a seal lip of a bearing with a seal ring and an intersection of a bottom surface and a side surface of a stepped seal groove according to embodiment 3 of the present invention;

fig. 14d is a partial cross-sectional view of a seal lip of a bearing with a seal ring according to embodiment 3 of the present invention contacting with a bottom surface of a groove-type seal groove;

fig. 14e is a partial cross-sectional view of the seal lip of the bearing with a seal ring contacting the side surface of the groove-type seal groove according to embodiment 3 of the present invention;

fig. 14f is a partial cross-sectional view of a contact between a seal lip of a bearing with a seal ring and an intersection of a bottom surface and a side surface of a groove-type seal groove according to embodiment 3 of the present invention;

fig. 15 is a flowchart of a method for manufacturing a seal ring according to embodiment 1 of the present invention.

Description of the reference numerals:

10: a bearing inner race;

100: the outer diameter surface of the bearing inner ring;

20: a bearing outer race;

200: the inner diameter surface of the bearing outer ring;

30: a steel ball;

40: a seal ring;

400: a seal ring body; 4001: a second elastomer; 4002: a framework of the sealing ring body; 4003: a second conductive strip; 4004: an inner end portion of the second conductive strip; 40041: an inner conductive strip; 4005: the outer end part of the second conductive strip; 40051: an outer conductive strip;

401: the inner diameter surface of the sealing ring body;

402: the outer diameter surface of the sealing ring body;

410: a sealing lip; 4101: a first elastic body; 4102: a first conductive strip;

411: an extension; 4111: an extension portion elastic body; 4112: an elongated conductive strip;

50: an annular gap;

60: a raceway;

70: a stepped seal groove;

700: the bottom surface of the stepped seal groove; 701: a side surface of the stepped seal groove;

80: a groove-shaped sealing groove;

800: the bottom surface of the groove type sealing groove; 801: the side surface of the groove type sealing groove;

a: axial of the annular gap;

b: the radial direction of the sealing ring;

c: the axial direction of the sealing ring.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended to limit the features of the invention to that embodiment. On the contrary, the intention of implementing the novel features described in connection with the embodiments is to cover other alternatives or modifications which may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Furthermore, some of the specific details are omitted from the description so as not to obscure or obscure the present invention. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "radial direction", "axial direction", "circumferential direction", "inner direction", "outer direction", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships which are usually arranged when the utility model is used, and are only for convenience of describing the utility model and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the utility model.

The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe embodiments of the present invention in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Example 1

The present embodiment discloses a seal ring for a bearing, please refer to fig. 1, the seal ring 40 is configured to be sleeved between a bearing inner ring 10 and a bearing outer ring 20 of the bearing, the seal ring 40 has a conductive structure, and the conductive structure is configured as follows: the bearing inner ring 10 and the bearing outer ring 20 are electrically connected, so that the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 can be electrically conducted in sequence to form a conductive loop.

Specifically, in the present embodiment, the seal ring 40 may be mounted on a deep groove ball bearing, or may be mounted on other types of roller bearings. The sealing ring 40 can be designed by those skilled in the art according to practical situations and specific needs, and the embodiment is not limited in this respect.

More specifically, in this embodiment, the sealing ring 40 may be mounted on a bearing, or may be mounted on other equipment for sealing between an inner ring and an outer ring of a similar hole. The sealing ring 40 can be designed by those skilled in the art according to practical situations and specific needs, and the embodiment is not limited in this respect.

More specifically, in the present embodiment, the conductive circuit formed by sequentially electrically conducting the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 and the circuit formed by sequentially electrically conducting the bearing inner ring 10, the steel ball 30, and the bearing outer ring 20 are parallel circuits.

In the present embodiment, the shaft current generated by the shaft voltage applied between the bearing inner ring 10 and the bearing outer ring 20 of the bearing by the motor damages the surface of the metal raceway 60 and the surface of the steel ball 30 of the bearing, and after the damages are accumulated, electric corrosion is formed. The conductive structure of the sealing ring 40 is electrically connected with the bearing inner ring 10 and the bearing outer ring 20 respectively, so that the bearing inner ring 10, the sealing ring 40 and the bearing outer ring 20 can be sequentially electrically conducted to form a conductive loop. The conductive loop formed by sequentially electrically conducting the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 and the loop formed by sequentially electrically conducting the bearing inner ring 10, the steel ball 30 and the bearing outer ring 20 are parallel loops, and the shaft current on the loop formed by sequentially electrically conducting the bearing inner ring 10, the steel ball 30 and the bearing outer ring 20 is shunted, so that the damage of the shaft current to the surface of the metal raceway 60 and the surface of the steel ball 30 of the bearing is reduced, and the probability of electric corrosion on the surface of the metal raceway 60 and the surface of the steel ball 30 of the bearing is reduced.

Further, the present embodiment also discloses a seal ring for a bearing, please refer to fig. 1-3, in which the seal ring 40 includes a seal ring body 400 having a body conductive portion, an inner diameter surface 401 of the seal ring body 400 and/or an outer diameter surface 402 of the seal ring body 400 is provided with a seal lip 410 having a lip conductive portion, and the lip conductive portion and the body conductive portion respectively form a part of the conductive structure. The seal lip 410 on the inner diameter surface 401 of the seal ring body 400 is electrically connected between the body conductive portion of the seal ring body 400 and the bearing inner ring 10 through the corresponding lip conductive portion. The seal lip 410 on the outer diameter surface 402 of the seal ring body 400 is electrically connected between the body conductive portion of the seal ring body 400 and the bearing outer ring 20 through the corresponding lip conductive portion.

Specifically, in this embodiment, the connection manner of the sealing lip 410 and the sealing ring body 400 is any one of non-detachable fixed connection manners such as integral molding, bonding, welding, and the like, which are common to those skilled in the art, and may also be one of screw connection, clamping connection, sleeving connection, or other detachable connection manners, which are common to those skilled in the art. Those skilled in the art can design the device according to practical situations and specific requirements, and the embodiment is not limited in this respect.

More specifically, in the present embodiment, the specific structures of the seal ring body 400 and the seal lip 410 are described later, and are not described again here.

In this embodiment, the seal ring body 400 having the body conductive portion and the seal lip 410 having the lip conductive portion can prevent dust and impurities from entering the inside of the bearing and prevent grease inside the bearing from leaking, thereby achieving the sealing function. The bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 can be electrically conducted in sequence to form a conductive circuit, so as to realize the function of electrical conduction.

Further, the embodiment also discloses a seal ring for a bearing, please refer to fig. 1-3 and fig. 4 a-12b, the seal lip 410 includes a first elastic body 4101 and a first conductive strip 4102, and the first conductive strip 4102 constitutes a lip conductive part. The first conductive strips 4102 are distributed in a concentrated manner in the first elastic body 4101, or the first conductive strips 4102 are distributed uniformly in the first elastic body 4101. In the seal lip 410 located on the inner diameter surface 401 of the seal ring body 400, one end of the first conductive strip 4102 is electrically connected to the body conductive portion, so that the seal lip 410 is electrically connected to the inner diameter surface 401 of the seal ring body 400, and the other end is used for electrical connection to the outer diameter surface 100 of the bearing inner ring 10. And/or, in the seal lip 410 located on the outer diameter surface 402 of the seal ring body 400, one end of the first conductive strip 4102 is electrically connected with the conductive portion of the body, so that the seal lip 410 is electrically connected with the outer diameter surface 402 of the seal ring body 400, and the other end is used for being electrically connected with the inner diameter surface 200 of the bearing outer ring 20.

Specifically, in the present embodiment, the first conductive strips 4102 are uniformly distributed in the first elastic body 4101 along the radial direction B of the sealing ring 40, and the distribution shape of the first conductive strips 4102 is similar to a disc shape. The first conductive strips 4102 are distributed concentrically in the first elastic body 4101 along the radial direction B of the sealing ring 40, and the distribution shape of the first conductive strips 4102 is similar to a strip shape, which may be specifically set according to actual design and use requirements, and this embodiment is not specifically limited thereto.

More specifically, in this embodiment, the first conductive strips 4102 are distributed in the first elastic body 4101 in a concentrated manner along the radial direction B of the sealing ring 40, and the first conductive strips 4102 are distributed in a concentrated manner along the radial direction B of the sealing ring 40 in an inner circumferential area of the first elastic body 4101, which may be one twentieth, one thirtieth, one forty-th, and so on; the specific configuration may be set according to actual design and use requirements, and this embodiment does not specifically limit this.

More specifically, in this embodiment, the first conductive strips 4102 are uniformly distributed in the first elastic body 4101 along the axial direction C of the sealing ring 40, or are intensively distributed in the first elastic body 4101 along the axial direction C of the sealing ring 40, and the axial area of the first conductive strips 4101 intensively distributed in the first elastic body 4101 may be one half, one third, one quarter, and the like; the specific configuration may be set according to actual design and use requirements, and this embodiment does not specifically limit this.

More specifically, in the present embodiment, the position of the first conductive strip 4102 distributed in the first elastic body 4101 is related to the sealing performance of the sealing lip 410, and since the sealing lip 410 with conductivity may reduce the wear resistance of the sealing lip 410, and further affect the sealing performance, in order to better realize the sealing function of the sealing lip 410, and simultaneously realize the conductivity function of the sealing lip 410. It is possible to let the first conductive strip 4102 be distributed within the first elastomer 4101 of the sealing lip 410 without affecting the sealing performance. Therefore, in the contact seal ring, the contact seal lip can be used for realizing the electric conduction function, and the non-contact seal lip and the extension part can be used for realizing the electric conduction function instead of the contact seal lip. The specific configuration may be set according to actual design and use requirements, and this embodiment does not specifically limit this.

More specifically, in the present embodiment, the distribution of the first conductive strip 4102 in the first elastic body 4101 ensures that the first conductive strip 4102 forms a conductive beam in the sealing lip 410, which can be set according to actual design and use requirements, and this embodiment is not limited thereto.

More specifically, in this embodiment, when the sealing lip 410 is integrally formed, the conductive magnetic powder or the conductive carbon powder or the conductive metal powder in the first elastic body 4101 is intensively distributed in the first elastic body 4101 under the action of the external electromagnetic force to form the first conductive strip 4102, and after the sealing lip 410 is integrally formed, the position of the first conductive strip 4102 in the sealing lip 410 is fixed. More specifically, in the embodiment, the material of the first elastic body 4101 may be rubber, plastic, etc., which may be set according to actual design and use requirements, and this embodiment is not limited thereto.

More specifically, in this embodiment, the material of the first conductive strip 4102 may be conductive magnetic powder, conductive carbon powder, conductive metal powder, etc., which may be specifically set according to actual design and use requirements, and this embodiment is not specifically limited thereto.

More specifically, in the present embodiment, the connection manner of the first elastic body 4101 and the first conductive strip 4102 is bonding, integral molding, etc., which can be set according to actual design and use requirements, and this embodiment is not limited in particular.

In this embodiment, the first conductive strip 4102 may form a conductive beam in the sealing lip 410, the conductive beam makes the sealing lip 410 electrically conductive, the electrically conductive sealing lip 410 is electrically connected between the sealing ring body 400 and the bearing inner ring 10, and/or the sealing ring body 400 and the bearing outer ring 20, and the bearing inner ring 10, the sealing ring 40, and the bearing outer ring 20 are electrically connected in sequence to form a conductive loop, so as to achieve the function of electrical conduction.

Further, the embodiment also discloses a seal ring for a bearing, please refer to fig. 1-3, and fig. 4 a-4 b, wherein a seal lip 410 including a first elastic body 4101 and a first conductive strip 4102 is a contact seal lip; of the contact seal lips located on the inner diameter surface 401 of the seal ring body 400, the contact seal lips are disposed in contact with the outer diameter surface 100 of the bearing inner ring 10 so that the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the bearing inner ring 10. And/or, in the contact seal lip located at the outer diameter surface 402 of the seal ring body 400, the contact seal lip is disposed to contact the inner diameter surface 200 of the bearing outer ring 20, so that the other end of the first conductive strip 4102 is electrically connected with the inner diameter surface 200 of the bearing outer ring 20.

As shown in fig. 4b, the inner diameter surface 401 of the seal ring body 400 has 3 sealing lips 410, which are respectively the sealing lip 410 at the left portion, the sealing lip 410 at the middle portion, and the sealing lip 410 at the right portion, and are respectively the portions shown as three areas a, b, and c in fig. 4 b. Wherein, the sealing lip 410 located in the middle part is a contact sealing lip, and the sealing lips 410 located in the left part and the right part are non-contact sealing lips. Those skilled in the art will understand that the relative positions of the left, middle and right seal lips are described below with reference to fig. 4 b.

Specifically, in one embodiment, referring to fig. 1 and 4b, when a contact seal lip is disposed between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner ring 10, the contact seal lip directly contacts the outer diameter surface 100 of the bearing inner ring 10, so that the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the bearing inner ring 10.

More specifically, in another embodiment, referring to fig. 2 and 4b, when a contact seal lip is disposed between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer ring 20, the contact seal lip directly contacts the inner diameter surface 200 of the bearing outer ring 20, so that the other end of the first conductive strip 4102 is electrically connected to the inner diameter surface 200 of the bearing outer ring 20.

More specifically, in another embodiment, referring to fig. 3 and 4b, contact sealing lips are disposed between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the inner race 10 and between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the outer race 20, and the contact sealing lips directly contact with the outer diameter surface 100 of the inner race 10 and the inner diameter surface 200 of the outer race 20, respectively, so that the other end of the first conductive strip 4102 is electrically connected with the outer diameter surface 100 of the inner race 10 and the inner diameter surface 200 of the outer race 20, respectively.

More specifically, in this embodiment, the first conductive strips 4102 of the contact seal lip are intensively distributed in the first elastic body 4101 along the radial direction B of the seal ring 40, or are uniformly distributed in the first elastic body 4101 along the axial direction C of the seal ring 40, or are intensively distributed in the first elastic body 4101 along the axial direction C of the seal ring 40, so that the contact seal lip has conductivity, and the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop.

More specifically, in this embodiment, the first conductive strips 4102 of the contact seal lip are intensively distributed in the first elastic body 4101, and the first conductive strips 4102 of the contact seal lip may be intensively distributed in the first elastic body 4101 along the radial direction B of the seal ring 40, or intensively distributed in the first elastic body 4101 along the axial direction C of the seal ring 40, on the basis of ensuring that the bearing inner ring 10, the seal ring body 40 and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop, which may be specifically set according to actual design and use requirements, and this embodiment does not specifically limit this.

In the present embodiment, one end of the conductive contact seal lip can directly contact with the outer diameter surface 100 of the bearing inner ring 10, and/or the inner diameter surface 200 of the bearing outer ring 20 can contact with and form an electrical connection, and the other end is electrically connected with the seal ring body 400, so that the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 are sequentially electrically conducted to form a conductive circuit, thereby achieving the function of electrical conduction.

Further, the embodiment also discloses a seal ring for a bearing, please refer to fig. 1-3, and fig. 5 a-5 b, wherein the seal lip 410 including the first elastic body 4101 and the first conductive strip 4102 is a non-contact seal lip; one end of the non-contact sealing lip, which is far away from the sealing ring body 400, is provided with a plurality of extending parts 411, and the plurality of extending parts 411 are arranged at intervals along the circumferential direction of the non-contact sealing lip; the extension 411 includes an extension elastic body 4111 and an extension conductive strip 4112, the extension conductive strips 4112 are centralized or uniformly distributed in the extension elastic body 4111, and the extension conductive strip 4112 also forms a part of the conductive structure; in the non-contact seal lip located on the inner diameter surface 401 of the seal ring body 400, the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the bearing inner ring 10 via an extension conductive strip 4112; in the non-contact seal lip located on the outer diameter surface 402 of the seal ring body 400, the other end of the first conductive strip 4102 is electrically connected to the inner diameter surface 200 of the bearing outer ring 20 via an extension conductive strip 4112.

Specifically, in one embodiment, referring to fig. 1, 5a and 5b, when a non-contact seal lip is disposed between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner ring 10, the non-contact seal lip contacts the outer diameter surface 100 of the bearing inner ring 10 through the extension portion 411, so that the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the bearing inner ring 10.

More specifically, in another embodiment, referring to fig. 2, 5a and 5b, when a non-contact seal lip is disposed between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer ring 20, the non-contact seal lip contacts the inner diameter surface 200 of the bearing outer ring 20 through the extension portion 411, so that the other end of the first conductive strip 4102 is electrically connected to the inner diameter surface 200 of the bearing outer ring 20.

More specifically, in another embodiment, referring to fig. 3, 5a and 5b, non-contact seal lips are disposed between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the inner race 10 and between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the outer race 20, and the non-contact seal lips are respectively in contact with the outer diameter surface 100 of the inner race 10 and the inner diameter surface 200 of the outer race 20 through the extension 411, so that the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the inner race 10 and the inner diameter surface 200 of the outer race 20.

More specifically, in this embodiment, the first conductive strips 4102 of the non-contact seal lip are collectively distributed in the first elastic body 4101 along the radial direction B of the seal ring 40, or the first conductive strips 4102 of the non-contact seal lip are uniformly distributed in the first elastic body 4101 along the axial direction C of the seal ring 40, or the first conductive strips 4102 of the non-contact seal lip are collectively distributed in the first elastic body 4101 along the axial direction C of the seal ring 40, so that the non-contact seal lip has electrical conductivity, and the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 are sequentially electrically conducted through the non-contact seal lip and the extended portion to form an electrical conduction loop.

More specifically, in this embodiment, the first conductive strips 4102 of the non-contact seal lip are distributed in the first elastic body 4101 in a centralized manner, and the first conductive strips 4102 of the non-contact seal lip may be distributed in the first elastic body 4101 in a centralized manner along the radial direction B of the seal ring 40, or may be distributed in the first elastic body 4101 in a centralized manner along the axial direction C of the seal ring 40, and on the basis of ensuring that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop, they may be specifically set according to actual design and use requirements, which is not specifically limited in this embodiment.

More specifically, in the present embodiment, the plurality of extensions 411 are provided at intervals in the circumferential direction of the non-contact seal lip; the first conductive strip 4102 of the non-contact seal lip between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner race 10 has one end electrically connected to the inner diameter surface 401 of the seal ring body 400 and the other end electrically connected to the outer diameter surface 100 of the bearing inner race 10 via the extension conductive strip 4112 of the extension 411. The first conductive strip 4102 of the non-contact seal lip between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer ring 20 has one end electrically connected to the outer diameter surface 402 of the seal ring body 400 and the other end electrically connected to the inner diameter surface 200 of the bearing outer ring 20 via the extension conductive strip 4112 of the extension 411.

More specifically, in this embodiment, the number of the extending portions 411 may be 1, 2, 3, 4, and the like, which is specifically set according to requirements of the sealing ring 40 such as conductivity, sealing performance, and bearing friction torque, and this embodiment is not limited to this.

More specifically, in this embodiment, the extension portions 411 may be disposed at uniform intervals along the circumferential direction of the non-contact seal lip, or disposed at non-uniform intervals, which is not specifically limited in this embodiment.

More specifically, in the present embodiment, the shape of the extension 411 may be a circle, a tooth shape, an approximate rectangle, etc., which may be specifically set according to actual design and use requirements, and this embodiment is not particularly limited thereto.

More specifically, in this embodiment, the circumferential width of the extending conducting strip 4112 may be greater than the circumferential width of the first conducting strip 4102 of the non-contact sealing lip, and the width of the extending conducting strip 4112 may also be less than or equal to the circumferential width of the first conducting strip 4102 of the non-contact sealing lip, which may be specifically set according to the requirements of the electrical conductivity, the sealing performance, the bearing friction torque, and the like of the sealing ring 40, which is not specifically limited in this embodiment.

In this embodiment, the non-contact seal lip having conductivity can contact the outer diameter surface 100 of the bearing inner ring 10 via the extension 411, and/or contact the inner diameter surface 200 of the bearing outer ring 20 to form electrical connection, and the other end is electrically connected to the seal ring main body 400, so that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are electrically conducted in this order to form a conductive circuit, thereby achieving the function of electrical conduction.

Further, the embodiment also discloses a seal ring for a bearing, please refer to fig. 1-3, and fig. 4 a-5B, the seal ring body 400 includes a second elastic body 4001, a second conductive strip 4003, and a seal ring body skeleton 4002, the second conductive strip 4003 is centrally distributed in the second elastic body 4001, or uniformly distributed in the second elastic body 4001, and the second conductive strip 4003 has an inner end 4004 located at the position of the inner diameter surface 401 of the seal ring body 400, and an outer end 4005 located at the position of the outer diameter surface 402 of the seal ring body 400, the inner end 4004 is electrically connected to the outer end 4005, the seal ring body skeleton 4002 is embedded in the second elastic body 4001, the seal ring body skeleton 4002 is arranged along the radial direction B of the seal ring 40, the seal ring body skeleton 4002 is made of metal, and has conductivity; the second conductive strip 4003 forms a body conductive part, or/and the second conductive strip 4003 and the seal ring body skeleton 4002 together form the body conductive part; when the inner diameter surface 401 of the seal ring body 400 is electrically connected with the outer diameter surface 100 of the bearing inner ring 10 through the corresponding seal lip 410, the inner end portion 4004 of the second conductor bar 4003 is electrically connected with one end of the first conductor bar 4102 in the corresponding seal lip 410; when the inner diameter surface 401 of the seal ring body 400 is directly electrically connected with the outer diameter surface 100 of the bearing inner ring 10, the inner end portion 4004 of the second conductive strip 4003 is electrically connected with the outer diameter surface 100 of the bearing inner ring 10; when the outer diameter surface 402 of the seal ring body 400 is electrically connected with the inner diameter surface 200 of the bearing outer ring 20 through the corresponding seal lip 410, the outer end portion 4005 of the second conductive strip 4003 is electrically connected with one end of the first conductive strip 4102 in the corresponding seal lip 410; when the outer diameter surface 402 of the seal ring body 400 is directly electrically connected to the inner diameter surface 200 of the bearing cup 20, the outer end portion 4005 of the second conductive strip 4003 is electrically connected to the inner diameter surface 200 of the bearing cup 20.

Specifically, in the embodiment, the second conductive strips 4003 are distributed in the second elastic body 4001 in a centralized manner, or are uniformly distributed in the second elastic body 4001, so that the seal ring body 400 has conductivity, and the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are electrically conducted in sequence to form a conductive loop.

More specifically, in this embodiment, the number of the second conductive strips 4003 and the number of the first conductive strips 4102 may be the same or different, as long as electrical conduction can be formed, and the number is specifically set according to requirements of the sealing ring 40 such as electrical conduction performance, sealing performance, and bearing friction torque, which is not limited in this embodiment.

More specifically, in the present embodiment, referring to fig. 4 a-4 b, the seal ring 40 is a contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, each seal lip 410 is provided with a conductive strip, and the seal ring 40 directly contacts the outer diameter surface 100 of the inner bearing ring 10 through the middle contact seal lip 410 (which is a contact seal lip and corresponds to the region b in fig. 4 b), so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner bearing ring 10.

More specifically, in this embodiment, the second conductive strips 4003 are collectively distributed in the second elastic body 4001 along the radial direction B of the sealing ring 40, and the area occupied by the second conductive strips 4003 collectively distributed in the second elastic body 4001 along the radial direction B of the sealing ring 40 may be one twentieth, one thirtieth, one forty-th, and the like, which may be specifically set according to actual design and usage requirements, and this embodiment is not particularly limited thereto.

More specifically, in the present embodiment, the second conductive strips 4003 are uniformly distributed in the second elastic body 4001 along the axial direction C of the seal ring 40, and the axial occupying area intensively distributed in the second elastic body 4001 may be one half, one third, and the like. The specific configuration may be set according to actual design and use requirements, and this embodiment does not specifically limit this.

More specifically, in this embodiment, the second conductive strip 4003 is distributed along the axial direction C of the gasket 40 and is concentrated on one side of the gasket body skeleton 4002, and the second conductive strip 4003 is distributed along the radial direction B of the gasket 40, so that the gasket body 400 has conductivity. The second conductive strip 4003 may also be disposed to concentrate the gasket body skeleton 4002 on the left or right side along the axial direction C of the gasket 40, see fig. 7b and 8b, depending on the relative positions of the first elastic body 4101 and the sealing lip 410 of the first conductive strip 4102 in the axial direction of the gasket 40, which is not particularly limited in this embodiment.

More specifically, in this embodiment, when the seal ring body 400 is formed, the second conductive strips 4003 are distributed in the second elastic body 4001 under the action of external electromagnetic force, and after the seal ring body 400 is formed, the position of the second conductive strips 4003 in the seal ring body 400 is fixed.

More specifically, in this embodiment, the material of the second elastic body 4001 may be rubber, plastic, etc., which may be set according to actual design and use requirements, and this embodiment is not limited to this.

More specifically, in this embodiment, the material of the second conductive strip 4003 may be conductive magnetic powder, conductive carbon powder, conductive metal powder, etc., which may be set according to actual design and usage requirements, and this embodiment does not specifically limit this.

More specifically, in this embodiment, the connection manner between the second elastic body 4001 and the second conductive strip 4003 is bonding, integral molding, and the like, which can be set according to actual design and usage requirements, and this embodiment is not limited in particular.

It should be noted that, in this embodiment, the second conductive strip 4003 may form a conductive beam in the seal ring body 400, the conductive beam makes the seal ring body 400 have conductivity, the inner diameter surface 401 of the conductive seal ring body 400 is electrically connected to the bearing inner ring 10 through the seal lip 410 or directly electrically connected to the bearing inner ring 10, and the outer diameter surface 402 of the seal ring body 400 is electrically connected to the bearing outer ring 20 through the seal lip 410 or directly electrically connected to the bearing outer ring 20, so that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop, so as to implement the function of electrical conduction.

Further, this embodiment also discloses a seal ring for a bearing, please refer to fig. 5 a-5 b, in which the seal ring 40 is a contact seal ring, the second conductive strip 4003 constitutes a conductive portion of the body, the right seal lip 410 is provided with a conductive strip, and the seal ring 40 contacts the outer diameter surface 100 of the inner race 10 through the right non-contact seal lip 410 (which is a non-contact seal lip and corresponds to the region c in fig. 4 b) and the extension 411, so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner race 10. The second conductive strip 4003 is concentrically distributed on one side of the gasket body skeleton 4002 along the axial direction C of the gasket 40, and the second conductive strip 4003 extends along the radial direction B of the gasket 40, so that the second conductive strip 4003 is in a strip-shaped structure, one end of the strip-shaped structure forms an inner end portion 4004 of the second conductive strip 4003, and the other end of the strip-shaped structure forms an outer end portion 4005 of the second conductive strip 4003.

It should be noted that, in this embodiment, the conductive beams formed by the second conductive strip 4003 are intensively distributed on one side of the seal ring body skeleton 4002 along the axial direction C of the seal ring 40, the inner end portion 4004 of the second conductive strip 4003 is electrically connected to the bearing inner ring 10 through the seal lip 410 or directly electrically connected to the bearing inner ring 10, and the outer end portion 4005 of the second conductive strip 4003 is electrically connected to the bearing outer ring 20 through the seal lip 410 or directly electrically connected to the bearing outer ring 20, so that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop, so as to implement the function of electrical conduction.

Further, the present embodiment also discloses a seal ring for a bearing, please refer to fig. 6 a-6 b, wherein the seal ring 40 is a contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, each seal lip 410 is provided with a conductive strip, the seal ring 40 contacts the outer diameter surface 100 of the inner bearing ring 10 through the contact seal lip 410 at the middle part and the non-contact seal lip 410 and the extension part 411 at the right part, respectively, so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner bearing ring 10. The second conductive strip 4003 includes inner conductive strips 40041 and outer conductive strips 40051 arranged at intervals along the radial direction B of the seal ring 40, one end of the inner conductive strip 40041 facing away from the outer conductive strip 40051 constitutes an inner end portion 4004 of the second conductive strip 4003, one end of the outer conductive strip 40051 facing away from the inner conductive strip 40041 constitutes an outer end portion 4005 of the second conductive strip 4003, and the inner conductive strip 40041 is electrically connected to the outer conductive strip 40051 through a seal ring body skeleton 4002, so that the inner end portion 4004 of the second conductive strip 4003 is electrically connected to the outer end portion.

Specifically, in this embodiment, the outer diameter of the inner conductive strip 40041 is greater than or equal to the inner diameter of the gasket body skeleton 4002, and the inner diameter of the outer conductive strip 40051 is less than or equal to the outer diameter of the gasket body skeleton 4002. In this embodiment, the outer diameter of the inner conductive strip 40041 and the inner diameter of the outer conductive strip 40051 are not specifically limited, and may be set according to actual design and usage requirements on the premise of ensuring that the conductive bundle is formed in the radial direction B of the sealing ring 40.

More specifically, in the present embodiment, referring to fig. 7 a-7 b, the seal ring 40 is a contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, the conductive strip is disposed on the right non-contact seal lip 410, and the seal ring 40 contacts the outer diameter surface 100 of the inner bearing ring 10 through the right non-contact seal lip 410 and the extension 411, so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner bearing ring 10.

More specifically, in this embodiment, referring to fig. 8 a-8 b, the seal ring 40 is a contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, the non-contact seal lip 410 (which is a non-contact seal lip and corresponds to the area a in fig. 4 b) located at the left part and the contact seal lip 410 located at the middle part are provided with conductive strips, and the seal ring 40 directly contacts with the outer diameter surface 100 of the inner bearing ring 10 through the contact seal lip 410 located at the middle part, so that the seal ring 40 is electrically connected with the outer diameter surface 100 of the inner bearing ring 10.

More specifically, in this embodiment, the distribution of the inner conductive bar 40041 and the outer conductive bar 40051 is not specifically limited, the inner conductive bar 40041 and the outer conductive bar 40051 may be centrally distributed along the axial direction C of the seal ring 40 on the right side of the seal ring body skeleton 4002, or on the left side of the seal ring body skeleton 4002, and it is sufficient to ensure that the inner conductive bar 40041 and the outer conductive bar 40051 are electrically connected through the seal ring body skeleton 4002 and form a conductive bundle, that is, the width C of the inner conductive bar 40041 and the outer conductive bar 40051 along the axial direction C of the seal ring 40 must be ensured to have an overlapping portion, that is, an overlapping size in width, with the width C of the seal ring body skeleton 4002 along the axial direction C of the seal ring 40, which may be specifically set according to actual design and usage requirements, and this embodiment is not specifically limited.

In this embodiment, one end of the inner conductive strip 40041 is electrically connected to one end of the outer conductive strip 40051 through the seal ring body skeleton 4002, the other end of the inner conductive strip 40041 is electrically connected to the bearing inner ring 10 through the seal lip 410 or directly electrically connected to the bearing inner ring 10, and the other end of the outer conductive strip 40051 is electrically connected to the bearing outer ring 20 through the seal lip 410 or directly electrically connected to the bearing outer ring 20, so that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop, thereby achieving the function of electrical conduction.

Further, in the embodiment, a sealing ring for a bearing is disclosed, please refer to fig. 4 a-12b, a plurality of first conductive strips 4102 and second conductive strips 4003 are provided, the plurality of first conductive strips 4102 are arranged at intervals along the circumferential direction of the sealing lip 410, and the plurality of second conductive strips 4003 are arranged at intervals along the circumferential direction of the sealing ring body 400; the first elastic body 4101 and the second elastic body 4001 are made of rubber or plastic; the first conductive strip 4102 and the second conductive strip 4003 are made of conductive magnetic powder, conductive carbon powder or conductive metal powder.

Specifically, in this embodiment, the number of the first conductive strips 4102 and the number of the second conductive strips 4003 may be 1, 2, 3, 4, etc., which are specifically set according to the requirements of the sealing ring 40, such as the conductivity, the sealing performance, and the bearing friction torque, which is not limited in this embodiment.

More specifically, in this embodiment, in the second conductive strip 4003, the number of the inner conductive strips 40041 and the number of the outer conductive strips 40051 may be the same or different, as long as electrical conduction can be formed, and the number is specifically set according to requirements of the sealing ring 40, such as electrical conduction performance, sealing performance, and bearing friction torque, and the like, which is not specifically limited in this embodiment.

More specifically, the plurality of first conductive strips 4102 and the plurality of second conductive strips 4003 may be respectively disposed at uniform intervals, or may be respectively disposed at non-uniform intervals, which is not specifically limited in this embodiment.

More specifically, in this embodiment, when the first elastic body 4101 and the second elastic body 4001 are made of rubber, the first elastic body 4101 and the first conductive strip 4102, and the second elastic body 4001 and the second conductive strip 4003 are integrally formed by vulcanization; when the first elastic body 4101 and the second elastic body 4001 are made of plastic, the first elastic body 4101 and the first conductive strip 4102, and the second elastic body 4001 and the second conductive strip 4003 are integrally injection-molded.

More specifically, in this embodiment, when the first elastic body 4101 and the second elastic body 4001 are made of rubber, the first conductive strip 4102 and the second conductive strip 4003 are made of conductive magnetic powder, conductive carbon powder, conductive metal powder, etc., and the first elastic body 4101, the first conductive strip 4102, the second elastic body 4001 and the second conductive strip 4003 are stacked to form the first conductive strip 4102 and the second conductive strip 4003 under the action of external electromagnetic force during the integral vulcanization molding process, i.e. the conductive magnetic powder, the conductive carbon powder, the conductive metal powder, etc. are distributed to form the first conductive strip 4102 and the second conductive strip 4003 in a concentrated manner. After the integral vulcanization molding is cooled, the first conductive strip 4102 and the second conductive strip 4003 are fixed in position and size in the middle of the first elastic body 4101 and the second elastic body 4001.

More specifically, in this embodiment, when the first elastic body 4101 and the second elastic body 4001 are made of plastic, the first conductive strip 4102 and the second conductive strip 4003 are made of conductive magnetic powder, conductive carbon powder, conductive metal powder, etc., and the first elastic body 4101, the first conductive strip 4102, the second elastic body 4001, and the second conductive strip 4003 are stacked to form the first conductive strip 4102 and the second conductive strip 4003 under the action of external electromagnetic force during the injection molding process, that is, the conductive magnetic powder, the conductive carbon powder, the conductive metal powder, etc. are distributed to form the first conductive strip 4102 and the second conductive strip 4003 in a concentrated manner. When the injection molding is cooled, the first conductive strip 4102 and the second conductive strip 4003 are fixed in position and size in the middle of the first elastic body 4101 and the second elastic body 4001.

It should be noted that, in this embodiment, when the first elastic body 4101 and the second elastic body 4001 are made of rubber, the first conductive strip 4102 and the second conductive strip 4003 are made of conductive magnetic powder, conductive carbon powder, or conductive metal powder, so that the sealing lip 410 and the sealing ring body 400 have conductivity, and when the first elastic body 4101 and the second elastic body 4001 are made of plastic, the first conductive strip 4102 and the second conductive strip 4003 are made of conductive magnetic powder, conductive carbon powder, or conductive metal powder, so that the sealing lip 410 and the sealing ring body 400 have conductivity. The plurality of first conductive strips 4102 are arranged at intervals along the circumferential direction of the seal lip 410, and the plurality of second conductive strips 4003 are arranged at intervals along the circumferential direction of the seal ring body 400, so that the shaft current can be increased to pass through a conductive loop formed by sequentially and electrically conducting the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20, the damage of the shaft current to the metal rolling surface of the bearing is reduced, and the probability of electric corrosion on the surface of the metal raceway 60 and the surface of the steel ball 30 of the bearing is reduced.

Further, the present embodiment also discloses a seal ring for a bearing, please refer to fig. 4 a-12b, in which the seal ring body 400 and the seal lip 410 are integrally formed; a plurality of sealing lips 410 are provided, at least one sealing lip 410 has a first conductive strip 4102 formed therein, and the first conductive strip 4102 and the second conductive strip 4003 are provided in a one-to-one correspondence.

Specifically, in this embodiment, the number of the sealing lips 410 may be 1, 2, 3, 4, and the like, which is specifically set according to the requirements of the sealing ring 40, such as the electrical conductivity, the sealing performance, and the bearing friction torque, and the like, which is not specifically limited in this embodiment.

More specifically, in the present embodiment, when at least one of the sealing lips 410 is a contact sealing lip, the sealing ring 40 is a contact sealing ring, and when all the sealing lips 410 are non-contact sealing lips, the sealing ring 40 is a non-contact sealing ring.

More specifically, in the present embodiment, all of the plurality of seal lips 410 may be contact seal lips, or all of them may be non-contact seal lips. It is also possible to have part of the contact sealing lip and part of the non-contact sealing lip. In order to realize that the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 are sequentially electrically conducted to form a conductive loop, the method can be implemented as follows: (1) The bearing inner ring 10, the sealing ring 40 and the bearing outer ring 20 are sequentially and electrically conducted to form a conductive loop by directly utilizing 1 or more contact sealing lips; the bearing inner ring 10, the sealing ring 40 and the bearing outer ring 20 can be sequentially and electrically conducted to form a conductive loop by utilizing 1 or more non-contact sealing lips and the extension 411; the 1 or more contact seal lips and the 1 or more non-contact seal lips and the extension 411 can be used simultaneously to realize the sequential electrical conduction of the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 to form a conductive loop. However, from the practical and economic points of view, only 1 contact seal lip or non-contact seal lip and the extension are needed to realize the sequential electrical conduction of the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 to form a conductive loop.

More specifically, in the present embodiment, the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are electrically conducted in sequence to form a conductive loop by directly using the contact seal lip or by using the non-contact seal lip and the extension 411, which depends on the sealing performance requirement, the conductive performance requirement, and the bearing running friction torque requirement, and those skilled in the art can design according to the actual situation and the specific requirement, which is not specifically limited in the present embodiment.

More specifically, in the present embodiment, the axial arrangement position of the plurality of sealing lips 410 in the sealing ring may be set according to actual design and use requirements, and depends on the sealing performance requirement and the running friction torque requirement, which is not specifically limited in the present embodiment.

More specifically, in the embodiment, the conductive magnetic powder or the conductive carbon powder or the conductive metal powder may be uniformly distributed in the sealing ring body 400 and the sealing lip 410, but a large amount of the conductive magnetic powder or the conductive carbon powder or the conductive metal powder is consumed, and meanwhile, the sealing lip 410 contains the conductive magnetic powder or the conductive carbon powder or the conductive metal powder, which reduces the sealing performance of the sealing lip. Therefore, in the process of integrally forming the seal ring body 400 and the seal lip 410, under the action of external electromagnetic force, the conductive magnetic powder, the conductive carbon powder, the conductive metal powder and the like move in the rubber or plastic body and are stacked to form the first conductive strip 4102 and the second conductive strip 4003 which are distributed in a concentrated manner, so that the use amount or consumption amount of the conductive magnetic powder, the conductive carbon powder and the conductive metal powder can be reduced, and the cost is reduced while the influence on the sealing performance is very little.

It should be noted that, in the embodiment, the seal ring body 400 and the seal lip 410 are integrally formed, so that the processing process of the seal ring 40 can be reduced, and after the seal ring body 400 and the seal lip are integrally formed, the position of the first conductive strip 4102 in the seal lip 410 is fixed; the position of the second conductive strip 4003 in the seal ring body 400 is fixed, the position of the extension conductive strip 4112 in the extension 411 is fixed, and the conductive beam formed by the first conductive strip 4102 and the second conductive strip 4003 or the conductive beam formed by the first conductive strip 4102, the second conductive strip 4003 and the extension conductive strip 4112 can form a conductive loop through electrical conduction between the seal ring 40 and the bearing inner ring 10 and the bearing outer ring 20, so that the damage of the shaft current to the metal rolling surface of the bearing is reduced, and the probability of the occurrence of galvanic corrosion on the surface of the metal raceway 60 of the bearing and the surface of the steel ball 30 is reduced.

Further, the present embodiment also discloses a bearing, please refer to fig. 1-3, the bearing of the present embodiment includes a bearing inner ring 10, a bearing outer ring 20, and a steel ball 30 disposed between the bearing inner ring 10 and the bearing outer ring 20, an annular gap 50 is formed between an inner diameter surface 200 of the bearing outer ring 20 and an outer diameter surface 100 of the bearing inner ring 10, the annular gap 50 is provided with a sealing ring 40 along two sides or one side of an axial direction a thereof, and the sealing ring is the sealing ring 40 for the bearing.

Specifically, in the present embodiment, the seal ring 40 for a bearing is provided on one side of the annular gap 50 in the axial direction a, the seal rings 40 for a bearing may be provided on both sides of the annular gap 50 in the axial direction a, the seal ring 40 for a bearing may be provided on one side of the annular gap 50 in the axial direction a, and a common seal ring may be used as the other side seal ring.

More specifically, in the present embodiment, the middle of the annular gap 50 in the axial direction a thereof is provided with a raceway 60 that accommodates the steel ball 30 and on which the steel ball 30 rolls, and in the axial direction a of the annular gap 50, the raceway 60 is located between the seal rings 40 on both sides.

In the present embodiment, the seal ring 40 is configured such that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are electrically conducted in sequence to form a conductive circuit. The shaft current on a conductive loop formed by sequentially conducting the bearing inner ring 10, the steel ball 30 and the bearing outer ring 20 can be shunted, so that the damage of the shaft current to the surface of the metal raceway 60 and the surface of the steel ball 30 of the bearing is reduced, and the probability of electric corrosion on the surface of the metal raceway 60 and the surface of the steel ball 30 of the bearing is reduced.

Further, referring to fig. 1, when only the inner diameter surface 401 of the seal ring body 400 is provided with the seal lip 410, the outer diameter surface 402 of the seal ring body 400 is in interference fit with the inner diameter surface 200 of the bearing outer ring 20, the inner diameter surface 401 of the seal ring body 400 is electrically connected with the outer diameter surface 100 of the bearing inner ring 10 through the seal lip 410, and the outer diameter surface 402 of the seal ring body 400 is directly electrically connected with the inner diameter surface 200 of the bearing outer ring 20; referring to fig. 2, when only the outer diameter surface 402 of the seal ring body 400 is provided with the sealing lip 410, the inner diameter surface 401 of the seal ring body 400 is in interference fit with the outer diameter surface 100 of the bearing inner ring 10, the outer diameter surface 402 of the seal ring body 400 is electrically connected with the inner diameter surface 200 of the bearing outer ring 20 through the sealing lip 410, and the inner diameter surface 401 of the seal ring body 400 is directly electrically connected with the outer diameter surface 100 of the bearing inner ring 10; referring to fig. 3, when the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 402 of the seal ring body 400 are both provided with the seal lips 410, the inner diameter surface 401 of the seal ring body 400 is electrically connected to the outer diameter surface 100 of the bearing inner race 10 through the seal lip 410 on the inner diameter surface 401 of the seal ring body 400, and the outer diameter surface 402 of the seal ring body 400 is electrically connected to the inner diameter surface 200 of the bearing outer race 20 through the seal lip 410 on the outer diameter surface 402 of the seal ring body 400.

Specifically, in one embodiment, referring to fig. 1, a sealing lip 410 is disposed between an inner diameter surface 401 of a sealing ring body 400 and an outer diameter surface 100 of a bearing inner ring 10, an outer diameter surface 402 of the sealing ring body 400 is in interference fit with an inner diameter surface 200 of a bearing outer ring 20, the inner diameter surface 401 of the sealing ring body 400 is electrically connected with the outer diameter surface 100 of the bearing inner ring 10 through the sealing lip 410, and the outer diameter surface 402 of the sealing ring body 400 is directly electrically connected with the inner diameter surface 200 of the bearing outer ring 20.

More specifically, in another embodiment, referring to fig. 2, a sealing lip 410 is disposed between an outer diameter surface 402 of the sealing ring body 400 and an inner diameter surface 200 of the bearing outer ring 20, the inner diameter surface 401 of the sealing ring body 400 is in interference fit with the outer diameter surface 100 of the bearing inner ring 10, the outer diameter surface 402 of the sealing ring body 400 is electrically connected with the inner diameter surface 200 of the bearing outer ring 20 through the sealing lip 410, and the inner diameter surface 401 of the sealing ring body 400 is directly electrically connected with the outer diameter surface 100 of the bearing inner ring 10.

More specifically, in still another embodiment, referring to fig. 3, seal lips 410 are provided between an inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner race 10, and between an outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer race 20, the inner diameter surface 401 of the seal ring body 400 is electrically connected to the outer diameter surface 100 of the bearing inner race 10 via the seal lip 410 located between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner race 10, and the outer diameter surface 402 of the seal ring body 400 is electrically connected to the inner diameter surface 200 of the bearing outer race 20 via the seal lip 410 located between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer race 20.

In the present embodiment, the seal lip 410 is provided between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner ring 10, or the seal lip 410 is provided between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer ring 20, or the seal lip 410 is provided between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the bearing inner ring 10 and between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the bearing outer ring 20, so that the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 are electrically connected in sequence to form an electrically conductive circuit, thereby achieving the function of electrical conduction.

Example 2

The present embodiment discloses a seal ring for a bearing, please refer to fig. 9a-12b, the structure of the seal ring for a bearing in the present embodiment is substantially the same as that of the seal ring for a bearing in embodiment 1, and the difference is that: the sealing ring for the bearing of the present embodiment is a non-contact sealing ring, and the sealing lips 410 are all non-contact sealing lips, and an extension 411 is disposed at one end of the non-contact sealing lips, which is away from the sealing ring body 400. Referring to fig. 13 and fig. 9a to 12b, the sealing lips 410 between the inner diameter surface 401 of the sealing ring body 400 and the outer diameter surface 100 of the bearing inner ring 10 are all non-contact sealing lips, and an extension 411 is provided at one end of the non-contact sealing lips facing away from the sealing ring body 400. The non-contact seal lip is in contact with the outer diameter surface 100 of the bearing inner race 10 through the extension 411, so that the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the bearing inner race 10. Note that, in this embodiment, the structure of the seal ring body 400 may be the structure of the seal ring body 400 in embodiment 1, and the structure of the non-contact seal lip and the extension portion may be the structure of the non-contact seal lip and the extension portion 411 in embodiment 1.

Specifically, in the present embodiment, referring to fig. 9 a-9 b, the seal ring 40 is a non-contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, each seal lip 410 is provided with a conductive strip, and the seal ring 40 contacts the outer diameter surface 100 of the inner bearing ring 10 through the middle non-contact seal lip 410 (which is a non-contact seal lip) and the extension 411, so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner bearing ring 10.

More specifically, in the present embodiment, referring to fig. 10a to fig. 10b, the seal ring 40 is a non-contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, each of the seal lips 410 is provided with a conductive strip, and the seal ring 40 contacts the outer diameter surface 100 of the inner bearing ring 10 through the middle non-contact seal lip 410 and the extension 411, so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner bearing ring 10.

More specifically, in this embodiment, referring to fig. 11 a-11 b, the seal ring 40 is a non-contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, the non-contact seal lip 410 located in the middle and the non-contact seal lip 410 located in the right are both provided with conductive strips, and the seal ring 40 is in contact with the outer diameter surface 100 of the inner race 10 through the non-contact seal lip 410 (which is a non-contact seal lip) located in the right and the extension 411, respectively, so that the seal ring 40 is electrically connected to the outer diameter surface 100 of the inner race 10.

More specifically, in this embodiment, referring to fig. 12 a-12b, the seal ring 40 is a non-contact seal ring, the second conductive strip 4003 and the seal ring body skeleton 4002 together form a body conductive part, the non-contact seal lip 410 located in the middle and the non-contact seal lip 410 located in the left (which are non-contact seal lips) are both provided with conductive strips, and the seal ring 40 contacts with the outer diameter surface 100 of the inner race 10 through the seal lip 410 in the middle and the extension 411, so that the seal ring 40 is electrically connected with the outer diameter surface 100 of the inner race 10.

More specifically, in another embodiment, referring to fig. 9a to 12b, the sealing lips 410 between the outer diameter surface 402 of the sealing ring body 400 and the inner diameter surface 200 of the bearing outer ring 20 are all non-contact sealing lips, and one end of the non-contact sealing lips facing away from the sealing ring body 400 is provided with an extension 411. The non-contact seal lip is in contact with the inner diameter surface 200 of the bearing outer race 20 via the extension 411, so that the other end of the first conductive strip 4102 is electrically connected to the inner diameter surface 200 of the bearing outer race 20.

More specifically, in another embodiment, referring to fig. 9a to 12b, the sealing lips 410 between the inner diameter surface 401 of the seal ring body 400 and the outer diameter surface 100 of the inner race 10 and between the outer diameter surface 402 of the seal ring body 400 and the inner diameter surface 200 of the outer race 20 are all non-contact sealing lips, and the non-contact sealing lips are in contact with the outer diameter surface 100 of the inner race 10 and the inner diameter surface 200 of the outer race 20 through the extension 411, respectively, so that the other end of the first conductive strip 4102 is electrically connected to the outer diameter surface 100 of the inner race 10 and the inner diameter surface 200 of the outer race 20, respectively.

In the present embodiment, when all the seal lips 410 between the inner diameter surface 401 of the seal ring main body 400 and the outer diameter surface 100 of the bearing inner ring 10 and/or between the outer diameter surface 402 of the seal ring main body 400 and the inner diameter surface 200 of the bearing outer ring 20 are non-contact seal lips, the non-contact seal lips and the extension portions 411 can electrically conduct the bearing inner ring 10, the seal ring 40, and the bearing outer ring 20 in sequence to form an electrically conductive circuit, thereby achieving the function of electrical conduction.

Example 3

In this embodiment, referring to fig. 14a to 14f, the structure of the bearing in this embodiment is substantially the same as that of the bearing in embodiment 1, and the difference is that: a stepped seal groove 70 or a groove seal groove 80 is disposed at a position of the outer diameter surface 100 of the bearing inner race 10 corresponding to the seal lip 410, wherein the seal lip 410 is disposed between the inner diameter surface of the seal ring body 400 and the outer diameter surface 100 of the bearing inner race 10. Referring to fig. 14a to 14c, in the bearing of the present embodiment, a stepped seal groove 70 is disposed at a position corresponding to the seal lip 410 on the outer diameter surface 100 of the bearing inner race 10, and the seal lip 410 contacts with the bottom surface 700, the side surface 701, or the intersection of the bottom surface 700 and the side surface 701 of the stepped seal groove 70. Referring to fig. 14d to 14f, in an alternative embodiment, a groove-type seal groove 80 is disposed at a position of the outer diameter surface 100 of the bearing inner race 10 corresponding to the seal lip 410, and the seal lip 410 contacts with a bottom surface 800, a side surface 801 or an intersection of the bottom surface 800 and the side surface 801 of the groove-type seal groove 80.

It should be noted that, in another alternative embodiment, when a seal lip is disposed between the outer diameter surface of the seal ring body 400 and the inner diameter surface 200 of the bearing outer ring 20, a stepped seal groove is disposed at a position of the inner diameter surface 200 of the bearing outer ring 20 corresponding to the seal lip, and the seal lip contacts with a bottom surface, a side surface, or an intersection of the bottom surface and the side surface of the stepped seal groove; or, a groove-type sealing groove is arranged at a position of the inner diameter surface 200 of the bearing outer ring 20 corresponding to the sealing lip, and the sealing lip is in contact with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the groove-type sealing groove.

In an alternative further embodiment, when sealing lips are simultaneously disposed between the inner diameter surface of the sealing ring body 400 and the outer diameter surface 100 of the bearing inner ring 10 and between the outer diameter surface of the sealing ring body 400 and the inner diameter surface 200 of the bearing outer ring 20, a step-type sealing groove is disposed at a position corresponding to the sealing lips of the outer diameter surface 100 of the bearing inner ring 10 and the inner diameter surface 200 of the bearing outer ring 20, and the sealing lips contact with the bottom surface, the side surfaces or the intersection of the bottom surface and the side surfaces of the step-type sealing groove; or, a groove-type sealing groove is arranged at the position of the outer diameter surface 100 of the bearing inner ring 10 and the inner diameter surface 200 of the bearing outer ring 20 corresponding to the sealing lip, and the sealing lip is contacted with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the groove-type sealing groove.

More specifically, in the present embodiment, referring to fig. 14a, a stepped seal groove 70 is disposed at a position of the outer diameter surface 100 of the bearing inner race 10 corresponding to the seal lip 410, and the seal lip 410 contacts with a bottom surface 700 of the stepped seal groove 70.

More specifically, in the present embodiment, referring to fig. 14b, a stepped sealing groove 70 is disposed at a position of the outer diameter surface 100 of the bearing inner ring 10 corresponding to the sealing lip 410, and the sealing lip 410 contacts with a side surface 701 of the stepped sealing groove 70.

More specifically, in the present embodiment, referring to fig. 14c, a stepped seal groove 70 is disposed at a position of the outer diameter surface 100 of the bearing inner race 10 corresponding to the seal lip 410, and the seal lip 410 contacts an intersection of the bottom surface 700 and the side surface 701 of the stepped seal groove 70.

More specifically, in the present embodiment, referring to fig. 14d, a groove-type seal groove 80 is disposed at a position of the outer diameter surface 100 of the bearing inner ring 10 corresponding to the seal lip 410, and the seal lip 410 contacts with the bottom surface 800 of the groove-type seal groove 80.

More specifically, in the present embodiment, referring to fig. 14e, a groove-type seal groove 80 is disposed at a position of the outer diameter surface 100 of the bearing inner ring 10 corresponding to the seal lip 410, and the seal lip 410 contacts with a side surface 801 of the groove-type seal groove 80.

More specifically, in the present embodiment, referring to fig. 14f, a groove-type seal groove 80 is disposed at a position of the outer diameter surface 100 of the bearing inner ring 10 corresponding to the seal lip 410, and the seal lip 410 contacts with an intersection of the bottom surface 800 and the side surface 801 of the groove-type seal groove 80.

In the present embodiment, when the stepped seal groove 70 or the groove-type seal groove 80 is provided at a position corresponding to the seal lip 410 on the outer diameter surface 100 of the bearing inner ring 10, the seal lip 410 contacts with the bottom surface 700, the side surface 701, or the intersection between the bottom surface 700 and the side surface 701 of the stepped seal groove 70, or the bottom surface 800, the side surface 801, or the intersection between the bottom surface 800 and the side surface 801 of the groove-type seal groove 80, the bearing inner ring 10, the seal ring body 400, and the bearing outer ring 20 are sequentially electrically conducted to form an electrically conductive circuit.

The utility model provides a take bearing of sealing washer is at practical application process:

for applications with higher sealing requirements, such as an automotive alternator, the bearing should use a contact-type seal ring, please refer to fig. 1 and fig. 2, for the contact-type seal ring, the seal lip 410 contacts with the inner diameter surface 200 of the outer race 20 or the outer diameter surface 100 of the inner race 10, and the specific implementation process is as follows:

when only one sealing lip 410 is provided in the contact type seal ring, a first conductive strip 4102 may be directly formed in the sealing lip 410, a second conductive strip 4003 corresponding to the first conductive strip 4102 may be formed in the seal ring body 400, and the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 are electrically connected in sequence to form a conductive loop through the electrical connection between the first conductive strip 4102 and the second conductive strip 4003.

When the contact type seal ring has a plurality of seal lips 410, please refer to fig. 4 a-8 b, for example, when there are 3 seal lips 410, one of the seal lips 410 contacts with the inner diameter surface 200 of the outer race 20 or the outer diameter surface 100 of the inner race 10, and the other two seal lips 410 do not contact with the inner diameter surface 200 of the outer race 20 or the outer diameter surface 100 of the inner race 10. Referring to fig. 8b, a first conductive strip 4102 may be directly formed in the contact seal lip (the middle seal lip 410), and a second conductive strip 4003 corresponding to the first conductive strip 4102 is formed in the seal ring body 400; referring to fig. 7b, an extension 411 may be disposed at the edge of the non-contact seal lip (the right seal lip 410), a first conductive strip 4102 and an extension conductive strip 4112 are formed in the non-contact seal lip and the extension 411, and a second conductive strip 4003 corresponding to the first conductive strip 4102 is formed in the seal ring body 400; referring to fig. 6b, it is also possible to form the first conductive strip 4102 and the extension portion 411 at the same time on the edge of the contact seal lip (the middle seal lip 410), the first conductive strip 4102 and the extension portion conductive strip 4112 are formed in the non-contact seal lip and the extension portion 411, and the second conductive strip 4003 corresponding to the first conductive strip 4102 is formed in the seal ring body 400. Through the electrical connection of the first conductive strip 4102, the extension conductive strip 4112 and the second conductive strip 4003, the bearing inner ring 10, the seal ring 40 and the bearing outer ring 20 are electrically conducted in sequence to form a conductive loop. Preferably, in order not to affect the sealing function of the contact seal lip 410, an extension 411 may be disposed at an edge of the non-contact seal lip, and a first conductive strip 4102 and an extension conductive strip 4112 are formed in the non-contact seal lip 410 and the extension 411, a second conductive strip 4003 corresponding to the first conductive strip 4102 is formed in the seal ring body 400, and the first conductive strip 4102, the extension conductive strip 4112 and the second conductive strip 4003 are electrically connected to form a conductive loop in sequence, so that the sealing performance of the seal ring 40 and the conductive performance of the seal ring 40 can be ensured, the number of the extensions 411 disposed on the non-contact seal lip depends on the requirements of the conductive performance, the sealing performance, the bearing friction torque, etc. of the seal lip 410, and this embodiment is not limited in this embodiment.

For a scene with low sealing requirements, such as sealing for an air conditioner motor, the bearing should use a non-contact sealing ring, and for the non-contact sealing ring, the sealing lip 410 does not contact with the inner diameter surface 200 of the bearing outer ring 20 or the outer diameter surface 100 of the bearing inner ring 10, which is implemented by the following specific processes:

one or more of the sealing lips 410 is not in contact with the inner diameter surface 200 of the outer race 20 or the outer diameter surface 100 of the inner race 10, see fig. 9a-12b, an extension 411 is directly provided at an edge of the one or more non-contact sealing lips, a first conductive strip 4102 and an extension conductive strip 4112 are formed in the non-contact sealing lips and the extension 411, a second conductive strip 4003 corresponding to the first conductive strip 4102 is formed in the seal body 400, and the inner race 10, the seal ring 40 and the outer race 20 are electrically connected in sequence to form a conductive loop through the electrical connection of the first conductive strip 4102, the extension conductive strip 4112 and the second conductive strip 4003. The number of the extending portions 411 provided on the non-contact seal lip depends on the requirements of the seal lip 410 such as electrical conductivity, sealing performance, and bearing friction torque, which is not particularly limited in this embodiment.

Referring to fig. 15, the seal ring in the bearing with the seal ring according to the present invention is manufactured by the following steps:

s1: the sealing ring body skeleton 4002, rubber or heated plastic mixed with conductive magnetic powder or conductive carbon powder or conductive metal powder uniformly is put into or extruded into the mold of the sealing ring 40.

S2: the mold is heated and pressurized to form the sealing ring 40, and external electromagnetic acting force is applied during the forming process of the sealing ring 40, so that the conductive magnetic powder or conductive carbon powder or conductive metal powder moves and accumulates in the liquid rubber or plastic under the action of electromagnetic force.

S3: when the molding of the seal ring 40 is completed, the conductive magnetic powder or conductive carbon powder or conductive metal powder forms the first conductive bar 4102 and the second conductive bar 4003 in a concentrated distribution in the seal lip 410 and the seal ring body 400. And rubber or plastic is formed into the first elastic body 4101 and the second elastic body 4001 in the seal lip 410 and the seal ring body 400. When the integral vulcanization molding of rubber is completed or the injection molding of plastic is completed, the stacked first conductive strip 4102 and second conductive strip 4003 are cooled to form a solid rubber or plastic member, and the positions of the two are fixed.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the invention, and it is not intended to limit the invention to the specific embodiments described. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a sealing washer for bearing, the sealing washer is used for the cover to be located between the bearing inner race and the bearing inner race of bearing, its characterized in that: the sealing ring has a conductive structure configured to: the bearing inner ring, the sealing ring and the bearing outer ring can be sequentially electrically conducted to form a conductive loop;

the seal ring comprises a seal ring body with a body conductive part, a seal lip with a lip conductive part is arranged on the inner diameter surface of the seal ring body and/or the outer diameter surface of the seal ring body, and the lip conductive part and the body conductive part respectively form part of the conductive structure;

the sealing lip positioned on the inner diameter surface of the sealing ring body is electrically connected between the body conductive part of the sealing ring body and the bearing inner ring through the corresponding lip conductive part;

the seal lip located on the outer diameter surface of the seal ring body is electrically connected between the body conductive part of the seal ring body and the bearing outer ring through the corresponding lip conductive part.

2. The seal ring for a bearing of claim 1, wherein said seal lip comprises a first elastomer and a first conductive strip, said first conductive strip forming said lip conductive portion; the first conductive strips are distributed in the first elastic bodies in a centralized way, or the first conductive strips are uniformly distributed in the first elastic bodies;

one end of the first conductive strip in the sealing lip located on the inner diameter surface of the sealing ring body is electrically connected with the body conductive part, so that the sealing lip is electrically connected with the inner diameter surface of the sealing ring body, and the other end of the first conductive strip is used for being electrically connected with the outer diameter surface of the bearing inner ring; and/or the presence of a gas in the gas,

in the seal lip located on the outer diameter surface of the seal ring body, one end of the first conductive strip is electrically connected with the body conductive part, so that the seal lip is electrically connected with the outer diameter surface of the seal ring body, and the other end of the first conductive strip is electrically connected with the inner diameter surface of the bearing outer ring.

3. The seal ring for a bearing of claim 2, wherein said seal lip comprising the first elastomer and the first conducting strip is a contact seal lip;

in a contact seal lip located on an inner diameter surface of the seal ring body, the contact seal lip is arranged to contact with an outer diameter surface of the bearing inner ring so that the other end of the first conductive strip is electrically connected with the outer diameter surface of the bearing inner ring; and/or the presence of a gas in the gas,

in the contact seal lip located on the outer diameter surface of the seal ring body, the contact seal lip is disposed in contact with the inner diameter surface of the bearing outer race so that the other end of the first conductive strip is electrically connected to the inner diameter surface of the bearing outer race.

4. The seal ring for a bearing of claim 2, wherein said seal lip comprising the first elastomer and the first conducting strip is a non-contact seal lip;

an extension part is arranged at one end, away from the sealing ring body, of the non-contact sealing lip, a plurality of extension parts are arranged, and the extension parts are arranged at intervals along the circumferential direction of the non-contact sealing lip; the extension part comprises an extension part elastic body and extension part conductive strips, the extension part conductive strips are intensively or uniformly distributed in the extension part elastic body, and the extension part conductive strips also form a part of the conductive structure;

in the non-contact sealing lip positioned on the inner diameter surface of the sealing ring body, the other end of the first conducting strip is electrically connected with the outer diameter surface of the bearing inner ring through the conducting strip of the extending part;

and in the non-contact sealing lip positioned on the outer diameter surface of the sealing ring body, the other end of the first conductive strip is electrically connected with the inner diameter surface of the bearing outer ring through the extending part conductive strip.

5. The seal ring for a bearing according to claim 4, wherein the seal ring body includes a second elastic body, a second conductive strip and a seal ring body framework, the second conductive strip is distributed in the second elastic body in a centralized manner or uniformly distributed in the second elastic body, the second conductive strip has an inner end located at an inner diameter surface of the seal ring body and an outer end located at an outer diameter surface of the seal ring body, the inner end is electrically connected with the outer end, the seal ring body framework is embedded in the second elastic body, the seal ring body framework is disposed along a radial direction of the seal ring, and the seal ring body framework is made of metal; the second conductive strip forms the body conductive part, or/and the second conductive strip and the seal ring body framework together form the body conductive part;

when the inner diameter surface of the sealing ring body is electrically connected with the outer diameter surface of the bearing inner ring through the corresponding sealing lip, the inner end part of the second conductive strip is electrically connected with one end of the first conductive strip in the corresponding sealing lip;

when the inner diameter surface of the sealing ring body is directly and electrically connected with the outer diameter surface of the bearing inner ring, the inner end part of the second conducting bar is electrically connected with the outer diameter surface of the bearing inner ring;

when the outer diameter surface of the seal ring body is electrically connected with the inner diameter surface of the bearing outer ring through the corresponding seal lip, the outer end part of the second conductive strip is electrically connected with one end of the first conductive strip in the corresponding seal lip;

when the outer diameter surface of the sealing ring body is directly electrically connected with the inner diameter surface of the bearing outer ring, the outer end part of the second conductive strip is electrically connected with the inner diameter surface of the bearing outer ring.

6. The gasket ring for a bearing of claim 5, wherein the second conductive strips are distributed on one side of the gasket ring body framework in a concentrated manner along the axial direction of the gasket ring, the second conductive strips extend along the radial direction of the gasket ring, so that the second conductive strips are in a strip-shaped structure, one end part of the strip-shaped structure forms an inner end part of the second conductive strip, and the other end part of the strip-shaped structure forms an outer end part of the second conductive strip.

7. The gasket ring for a bearing of claim 5, wherein the second conductive strip includes an inner conductive strip and an outer conductive strip spaced apart in a radial direction of the gasket ring, an end of the inner conductive strip facing away from the outer conductive strip constitutes an inner end portion of the second conductive strip, an end of the outer conductive strip facing away from the inner conductive strip constitutes an outer end portion of the second conductive strip, and the inner conductive strip is electrically connected to the outer conductive strip through the gasket ring body frame such that the inner end portion of the second conductive strip is electrically connected to the outer end portion.

8. The seal ring for bearings according to any one of claims 5 to 7, wherein the first conductive strips and the second conductive strips are provided in plural numbers, the plural first conductive strips are provided at intervals along the circumferential direction of the seal lip, and the plural second conductive strips are provided at intervals along the circumferential direction of the seal ring body;

the first elastic body and the second elastic body are made of rubber or plastic; the first conductive strip and the second conductive strip are made of conductive magnetic powder, conductive carbon powder or conductive metal powder.

9. The seal ring for a bearing of claim 8, wherein said seal ring body is integrally formed with said seal lip; the sealing lips are provided with a plurality of sealing lips, and the first conductive strip is formed in at least one sealing lip.

10. A bearing, including bearing inner race, bearing outer race and set up in the bearing inner race with the steel ball between the bearing outer race, be formed with the annular clearance between the internal diameter face of bearing outer race and the external diameter face of bearing inner race, the annular clearance is along its axial both sides or unilateral setting up the sealing washer, characterized in that, the sealing washer adopts the sealing washer for bearing of any claim 1-9.

11. The bearing of claim 10, wherein when a seal lip is provided only on the inner diameter surface of the seal ring body, the outer diameter surface of the seal ring body is in interference fit with the inner diameter surface of the bearing outer race, the inner diameter surface of the seal ring body is electrically connected with the outer diameter surface of the bearing inner race through the seal lip, and the outer diameter surface of the seal ring body is directly electrically connected with the inner diameter surface of the bearing outer race;

when only the outer diameter surface of the sealing ring body is provided with the sealing lip, the inner diameter surface of the sealing ring body is in interference fit with the outer diameter surface of the bearing inner ring, the outer diameter surface of the sealing ring body is electrically connected with the inner diameter surface of the bearing outer ring through the sealing lip, and the inner diameter surface of the sealing ring body is directly and electrically connected with the outer diameter surface of the bearing inner ring;

when the inside diameter face of sealing washer body with when the outside diameter face of sealing washer body all is provided with the seal lip, the inside diameter face of sealing washer body is through being located on the inside diameter face of sealing washer body the seal lip with bearing inner race's external diameter face electricity is connected, just the outside diameter face of sealing washer body is through being located on the outside diameter face of sealing washer body the seal lip with bearing outer race's internal diameter face electricity is connected.

12. The bearing of claim 10 or 11, wherein a stepped seal groove is formed in a position, corresponding to the seal lip, of the outer diameter surface of the bearing inner ring and/or the inner diameter surface of the bearing outer ring, and the seal lip is in contact with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the stepped seal groove; or,

the outer diameter surface of the bearing inner ring and/or the position of the inner diameter surface of the bearing outer ring corresponding to the seal lip are provided with groove type seal grooves, and the seal lip is in contact with the bottom surface, the side surface or the intersection of the bottom surface and the side surface of the groove type seal groove.