CN110748568A - Box type bearing sealing ring and bearing - Google Patents

Abstract

The embodiment of the invention provides a box-type bearing sealing ring and a bearing. Wherein box bearing seal ring includes: the static sealing ring comprises a static sealing ring radial part and a static axial lip; a dynamic seal ring comprising a dynamic seal ring radial portion; and the movable sealing ring is arranged between the radial part of the movable sealing ring and the radial part of the static sealing ring, is close to one side of the outer peripheral surface of the box-type bearing sealing ring relative to the static axial lip, and is suitable for rotating along with the rotation of the movable sealing ring. The box type bearing sealing ring provided by the embodiment of the invention can timely discharge impurities entering between the static sealing ring and the dynamic sealing ring, reduce the probability of the impurities further entering the bearing, slow down the abrasion of the box type bearing sealing ring, prolong the service life of the box type bearing sealing ring and also prolong the service life of the bearing.

Description

Box type bearing sealing ring and bearing

Technical Field

The embodiment of the invention relates to the field of bearing equipment, in particular to a box-type bearing sealing ring and a bearing.

Background

The bearing is an important part in the modern mechanical equipment. Its main function is to support the mechanical rotator, reduce the friction coefficient in its motion process and ensure its rotation precision, including inner ring, outer ring and rolling element. In order to reduce friction, lubricating oil or lubricating grease is filled between the outer ring and the inner ring and on one side close to the rolling bodies. In order to prevent leakage of lubricating oil or grease, a cartridge bearing seal ring is usually installed between the outer ring and the inner ring and at the end of the rolling element.

The existing cartridge bearing seal generally comprises a static seal ring and a dynamic seal ring. The static sealing ring comprises a static sealing ring radial part, a static axial lip, a static radial lip and a static sealing ring axial part; the static axial lip, the static radial lip and the static sealing ring axial portion are fixedly connected with the static sealing ring radial portion. The dynamic sealing ring comprises a dynamic sealing ring radial part and a dynamic sealing ring axial part which are fixedly connected with each other. The static axial lip and the radial part of the dynamic sealing ring are contacted with each other; the static radial lip and the axial part of the dynamic sealing ring are contacted with each other. When the box-type bearing sealing ring is installed, the static sealing ring is fixedly connected with the outer ring of the bearing, and the dynamic sealing ring is fixedly connected with the inner ring of the bearing.

Because the bearing is in a working state, the inner ring and the outer ring move relatively, complete sealing is difficult to achieve, and when external impurities enter the box type bearing sealing ring, the box type bearing sealing ring is abraded, so that the abrasion of the box type bearing sealing ring is reduced.

Therefore, how to discharge the impurities in the sealing ring of the cartridge bearing in time becomes a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

The technical problem solved by the embodiment of the invention is how to discharge impurities in the sealing ring of the box type bearing in time.

In order to solve the above problem, an embodiment of the present invention provides a box-type bearing seal ring, including:

the static sealing ring comprises a static sealing ring radial part and a static axial lip, and the static axial lip is fixedly connected with the static sealing ring radial part;

the dynamic sealing ring comprises a dynamic sealing ring radial part, the dynamic sealing ring radial part is parallel to the static sealing ring radial part, and the static axial lip is contacted with the dynamic sealing ring radial part;

the movable sealing ring is arranged between the radial part of the movable sealing ring and the radial part of the static sealing ring, and is close to one side of the outer peripheral surface of the box-type bearing sealing ring relative to the static axial lip, the first end of the movable sealing ring is contacted with the radial part of the static sealing ring, the second end of the movable sealing ring is contacted with the radial part of the movable sealing ring, and the movable sealing ring is suitable for rotating along with the rotation of the movable sealing ring.

Optionally, the longitudinal section of the movable sealing ring is in two symmetrical V-shapes, and the V-shape of the longitudinal section of each movable sealing ring faces the outer circumferential surface of the cartridge bearing sealing ring.

Optionally, the size of the V-shaped opening angle of the longitudinal section of the movable sealing ring ranges from 60 ° to 120 °.

Optionally, the second end of the movable sealing ring and the radial part of the movable sealing ring are in friction transmission.

Optionally, the longitudinal section of each static axial lip is in a shape of two symmetrical V, and the V shape of the longitudinal section of each static axial lip faces the outer peripheral surface of the box-type bearing sealing ring;

the V-shaped apex portion of the longitudinal section of the stationary axial lip is in contact with the V-shaped apex portion of the longitudinal section of the movable seal ring.

Optionally, the movable sealing ring and the movable sealing ring are made of rubber.

Optionally, the machining process of the movable sealing ring is an integral molding process.

Optionally, the movable sealing ring comprises:

the two ends of the elastic part are respectively contacted with the static sealing ring and the dynamic sealing ring;

the supporting part is wrapped inside the elastic part by the elastic part.

Optionally, the material of the elastic part is rubber; the material of the supporting part is steel.

An embodiment of the present invention further provides a bearing, including:

an inner ring;

an outer ring;

a rolling body;

the box type bearing sealing ring;

the box type bearing sealing ring is arranged between the inner ring and the outer ring and is positioned at the end part of the rolling body;

the inner ring is fixedly connected with a movable sealing ring of the box type bearing sealing ring;

and the outer ring is fixedly connected with the static sealing ring of the box-type bearing sealing ring.

Compared with the prior art, the technical scheme of the embodiment of the invention has the following advantages and effects:

the embodiment of the invention provides a box type bearing sealing ring, which comprises: the static sealing ring comprises a static sealing ring radial part and a static axial lip, and the static axial lip is fixedly connected with the static sealing ring radial part; the dynamic sealing ring comprises a dynamic sealing ring radial part, and the dynamic sealing ring radial part is parallel to the static sealing ring radial part; a movable seal ring provided between the movable seal ring radial portion and the stationary seal ring radial portion, on a side close to an outer ring of the bearing with respect to the stationary axial lip; the first end of the movable sealing ring is in contact with the radial part of the static sealing ring, and the second end of the movable sealing ring is in contact with the radial part of the movable sealing ring; the movable seal ring is adapted to rotate with rotation of the movable seal ring.

It can be seen that, in the box-type bearing seal ring provided in the embodiment of the present invention, the movable seal ring capable of rotating along with the rotation of the movable seal ring is disposed between the static seal ring and the movable seal ring, when the box-type bearing seal ring is in a working state, impurities enter between the static seal ring and the movable seal ring and are deposited on the movable seal ring, however, the movable seal ring can rotate along with the rotation of the movable seal ring, so that the impurities deposited on the movable seal ring rotate along with the movable seal ring, and when the impurities rotate to a position below the bearing, the impurities are separated from the movable seal ring under the action of gravity and can be discharged from a gap between the static seal ring and the movable seal ring. Therefore, the box type bearing sealing ring provided by the embodiment of the invention can timely discharge impurities entering between the static sealing ring and the dynamic sealing ring, reduce the probability of the impurities further entering the interior of the bearing, slow down the abrasion of the box type bearing sealing ring, prolong the service life of the box type bearing sealing ring and prolong the service life of the bearing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic longitudinal sectional view of a cartridge-type bearing seal ring;

FIG. 2 is a schematic longitudinal sectional view of a seal ring of a cartridge bearing according to an embodiment of the present invention;

FIG. 3 is a schematic longitudinal sectional view of a sealing ring of a cartridge bearing according to an embodiment of the present invention before impurities move in a working state;

FIG. 4 is an axial view illustrating the sealing ring of the cartridge bearing according to an embodiment of the present invention before the movement of impurities in the operating state;

FIG. 5 is an axial schematic view of the sealing ring of the cartridge bearing provided in the embodiment of the present invention during the movement of impurities in the operating state;

FIG. 6 is a schematic longitudinal sectional view of a sealing ring of a cartridge bearing according to an embodiment of the present invention, illustrating the completion of the movement of impurities in the operating state;

fig. 7 is an axial schematic view of the cartridge bearing seal ring according to the embodiment of the present invention at the end of the movement of the foreign matter in the operating state.

Legend: 1. a static seal ring; 11. a static seal ring radial portion; 12. a static axial lip; 13. a static radial lip; 14. a static seal ring axial portion; 2. a movable sealing ring; 21. a dynamic seal ring radial portion; 22. a dynamic seal ring axial portion; 3. a movable seal ring.

Detailed Description

As known from the background art, impurities in the sealing ring of the existing box type bearing are not easy to discharge in time.

A description will now be given in conjunction with a cartridge type bearing seal ring.

Referring to fig. 1, fig. 1 is a schematic longitudinal sectional view of a box-type bearing seal ring.

The longitudinal section of the box type bearing sealing ring is a section obtained along the radial direction of the box type bearing sealing ring and passing through the axis of the box type bearing sealing ring.

As shown in fig. 1, the cartridge type bearing seal ring includes a stationary seal ring 1 and a movable seal ring 2.

The static sealing ring 1 comprises a static sealing ring radial part 11, a static axial lip 12, a static radial lip 13 and a static sealing ring axial part 14; and the static axial lip 12, the static radial lip 13 and the static sealing ring axial part 14 are fixedly connected with the static sealing ring radial part 11. The dynamic seal ring 2 comprises a dynamic seal ring radial part 21 and a dynamic seal ring axial part 22 which are fixedly connected with each other.

The static axial lip 12 and the dynamic sealing ring radial part 21 are contacted with each other; the static radial lip 13 and the dynamic seal ring axial portion 22 are in contact with each other.

When the box-type bearing sealing ring is installed, the static sealing ring 1 is fixedly connected with the outer ring of the bearing, and the dynamic sealing ring 2 is fixedly connected with the inner ring of the bearing.

The box-type bearing sealing ring is mainly applied to the condition that a bearing is vertically arranged, an outer ring of the bearing is a static ring of the bearing, and an inner ring of the bearing is a rotating ring of the bearing. In this case, since the static seal ring 1 is fixedly connected with the outer ring of the bearing, the static seal ring 1 remains static when the bearing is in a working state; because the movable sealing ring 2 is fixedly connected with the inner ring of the bearing, when the bearing is in a working state, the movable sealing ring 2 rotates along with the inner ring of the bearing.

When the bearing is vertically arranged, the arrow G direction in the figure is the gravity direction; the side B is close to the bearing rolling body; the side a is a side away from the bearing rolling elements with respect to the side B, i.e., the outside side.

In the working state of the bearing, part of foreign matters outside enter between the static sealing ring 1 and the dynamic sealing ring 2 of the box type bearing sealing ring through a gap between the static sealing ring axial part 14 and the dynamic sealing ring radial part 21. Since the static seal ring 1 is kept stationary and the static axial lip 12 and the dynamic seal ring radial portion 21 are in contact with each other, foreign matters entering into the cartridge type bearing seal ring are accumulated vertically above the static axial lip 12, i.e., at C in fig. 1. When the accumulated impurities are too much, the impurities can reach the position where the static axial lip 12 is contacted with the radial part 21 of the dynamic sealing ring, and because the dynamic sealing ring 2 continuously rotates, the impurities can continuously wear the static axial lip 12 and the radial part 21 of the dynamic sealing ring, even can drop to the inside of the static axial lip 12, and further wear other structures of the box-type bearing sealing ring. Therefore, it is necessary to discharge impurities entering the cartridge bearing seal ring in time.

In order to discharge impurities in a cartridge bearing seal ring in time, an embodiment of the present invention provides a cartridge bearing seal ring, including: the static sealing ring comprises a static sealing ring radial part and a static axial lip, and the static axial lip is fixedly connected with the static sealing ring radial part; the dynamic sealing ring comprises a dynamic sealing ring radial part, the dynamic sealing ring radial part is parallel to the static sealing ring radial part, and the static axial lip is contacted with the dynamic sealing ring radial part; the movable sealing ring is arranged between the radial part of the movable sealing ring and the radial part of the static sealing ring, and is close to one side of the outer peripheral surface of the box-type bearing sealing ring relative to the static axial lip, the first end of the movable sealing ring is contacted with the radial part of the static sealing ring, the second end of the movable sealing ring is contacted with the radial part of the movable sealing ring, and the movable sealing ring is suitable for rotating along with the rotation of the movable sealing ring.

It can be seen that, in the box-type bearing seal ring provided in the embodiment of the present invention, the movable seal ring capable of rotating along with the rotation of the movable seal ring is disposed between the static seal ring and the movable seal ring, when the box-type bearing seal ring is in a working state, impurities enter between the static seal ring and the movable seal ring and are deposited on the movable seal ring, however, the movable seal ring can rotate along with the rotation of the movable seal ring, so that the impurities deposited on the movable seal ring rotate along with the movable seal ring, and when the impurities rotate to a position below the bearing, the impurities are separated from the movable seal ring under the action of gravity and can be discharged from a gap between the static seal ring and the movable seal ring. Therefore, the box type bearing sealing ring provided by the embodiment of the invention can timely discharge impurities entering between the static sealing ring and the dynamic sealing ring, reduce the probability of the impurities further entering the interior of the bearing, slow down the abrasion of the box type bearing sealing ring, prolong the service life of the box type bearing sealing ring and prolong the service life of the bearing.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 2, fig. 2 is a schematic longitudinal sectional view of a sealing ring of a cartridge bearing according to an embodiment of the present invention.

As shown in the drawings, a cartridge type bearing seal ring according to an embodiment of the present invention includes:

the static sealing ring comprises a static sealing ring 1, wherein the static sealing ring 1 comprises a static sealing ring radial part 11 and a static axial lip 12, and the static axial lip 12 is fixedly connected with the static sealing ring radial part 11;

the dynamic seal ring 2 comprises a dynamic seal ring radial part 21, and the dynamic seal ring radial part 21 is parallel to the static seal ring radial part 11;

a movable seal ring 3 provided between the movable seal ring radial portion 21 and the stationary seal ring radial portion 11 and on a side closer to an outer ring of the bearing than the stationary axial lip 12;

a first end of the movable seal ring 3 is in contact with the stationary seal ring radial portion 11, and a second end of the movable seal ring 3 is in contact with the movable seal ring radial portion 21;

the movable seal ring 3 is adapted to rotate with the rotation of the movable seal ring 2.

When the cartridge bearing sealing ring is mounted, the static sealing ring 1 is fixedly connected with an outer ring of the bearing, and the dynamic sealing ring 2 is fixedly connected with an inner ring of the bearing. The box-type bearing sealing ring is mainly applied to the condition that a bearing is vertically arranged, an outer ring of the bearing is a static ring of the bearing, and an inner ring of the bearing is a rotating ring of the bearing. At the moment, the static sealing ring 1 is fixedly connected with the outer ring of the bearing, so that the static sealing ring 1 keeps static when the bearing is in a working state; because the movable sealing ring 2 is fixedly connected with the inner ring of the bearing, when the bearing is in a working state, the movable sealing ring 2 rotates along with the inner ring of the bearing.

The static axial lip 12 is a sealing lip on the static sealing ring 1, which extends along the axial direction of the box type bearing sealing ring. It is understood that, in order to improve the sealing performance, the static seal ring 1 may further include a static radial lip 13, and the static radial lip 13 is a seal lip on the static seal ring 1 extending in the radial direction of the cartridge bearing seal ring.

In order to make the static seal ring 1 and the outer ring of the bearing better fixedly connected, the static seal ring 1 may further comprise a static seal ring axial portion 14; the static radial lip 13 and the static sealing ring axial portion 14 are fixedly connected with the static sealing ring radial portion 11.

Of course, for better fixed connection of the dynamic seal ring 2 with the inner ring of the bearing, the dynamic seal ring 2 may further comprise a dynamic seal ring axial portion 22, and the dynamic seal ring axial portion 22 is fixedly connected with the dynamic seal ring radial portion 21.

When the static seal ring 1 further comprises the static radial lip 13 and the dynamic seal ring 2 further comprises the dynamic seal ring axial portion 22, the static radial lip 13 and the dynamic seal ring axial portion 22 are in contact with each other to further improve the sealing performance.

When the bearing is vertically arranged, the arrow G direction in the figure is the gravity direction; the side B is close to the bearing rolling body; the side a is a side away from the bearing rolling elements with respect to the side B, i.e., the outside side.

Referring to fig. 3 to fig. 4, fig. 3 is a schematic longitudinal sectional view of a sealing ring of a cartridge bearing according to an embodiment of the present invention before impurities move in a working state; fig. 4 is an axial schematic view of the cartridge bearing sealing ring according to the embodiment of the present invention before the movement of the foreign matter in the operating state.

In the working state of the bearing, part of impurities outside enter the box type bearing sealing ring through a gap between the static sealing ring axial part 14 and the dynamic sealing ring radial part 21. Because the static seal ring 1 keeps still, the movable seal ring 3 is arranged between the movable seal ring radial part 21 and the static seal ring radial part 11, relative to the side of the static axial lip 12 close to the outer ring of the bearing, the first end of the movable seal ring 3 is contacted with the static seal ring radial part 11, and the second end of the movable seal ring 3 is contacted with the movable seal ring radial part 21. Impurities entering the cartridge bearing seal ring are accumulated vertically above the movable seal ring 3, i.e. D in the drawing.

Referring to fig. 5, fig. 5 is an axial schematic view illustrating a movement process of impurities in a sealing ring of a cartridge bearing according to an embodiment of the present invention.

Since the movable seal ring 3 is rotatable in accordance with the rotation of the movable seal ring 2, the accumulated foreign matter is gradually moved from above the movable seal ring 3 to the side of the movable seal ring 3 and further to below the movable seal ring 3 in the rotational direction of the inner ring of the bearing by the combined action of gravity and the frictional force of the rotation of the movable seal ring 3.

Referring to fig. 6 to 7, fig. 6 is a schematic longitudinal sectional view illustrating an end of movement of impurities in a sealing ring of a cartridge bearing according to an embodiment of the present invention; fig. 7 is an axial schematic view of the cartridge bearing seal ring according to the embodiment of the present invention at the end of the movement of the foreign matter in the operating state.

When the accumulated foreign matter moves to the lower side of the movable seal ring 3, the foreign matter is discharged to the outside of the cartridge bearing seal ring through the gap between the seal ring axial portion 14 and the movable seal ring radial portion 21 by the gravity.

It can be seen that, in the box-type bearing seal ring provided in the embodiment of the present invention, the movable seal ring capable of rotating along with the rotation of the movable seal ring is disposed between the static seal ring and the movable seal ring, when the box-type bearing seal ring is in a working state, impurities enter between the static seal ring and the movable seal ring and are deposited on the movable seal ring, however, the movable seal ring can rotate along with the rotation of the movable seal ring, so that the impurities deposited on the movable seal ring rotate along with the movable seal ring, and when the impurities rotate to a position below the bearing, the impurities are separated from the movable seal ring under the action of gravity and can be discharged from a gap between the static seal ring and the movable seal ring. Therefore, the box type bearing sealing ring provided by the embodiment of the invention can timely discharge impurities entering between the static sealing ring and the dynamic sealing ring, reduce the probability of the impurities further entering the interior of the bearing, slow down the abrasion of the box type bearing sealing ring, prolong the service life of the box type bearing sealing ring and prolong the service life of the bearing.

In the cartridge bearing seal ring provided by the embodiment of the invention, the shape of the longitudinal section of the movable seal ring 3 can be set according to requirements.

However, since the rotational speed of the movable seal ring 3 is not constant; when the rotation speed of the movable seal ring 3 is slow, a part of the impurities may be accumulated vertically above the movable seal ring 3, and when the accumulated impurities are excessive, the impurities may reach the position where the movable seal ring 3 contacts the stationary seal ring radial portion 11 and the movable seal ring radial portion 21, so that, in the operating state, the movable seal ring 3 and the stationary seal ring radial portion 11 keep rotating relatively, and therefore the impurities reaching the positions of the movable seal ring 3 and the stationary seal ring radial portion 11 may continuously wear the movable seal ring 3 and the stationary seal ring radial portion 11. The movable sealing ring 3 and the radial part 21 of the movable sealing ring can keep rotating at the same speed, namely relatively static; but also relative rotation with the dynamic seal ring radial portion 21.

When the movable seal ring 3 and the movable seal ring radial portion 21 are held stationary relative to each other, the foreign matter reaching the positions of the movable seal ring 3 and the movable seal ring radial portion 21 does not wear the movable seal ring 3 and the movable seal ring radial portion 21.

When the movable seal ring 3 and the movable seal ring radial portion 21 keep rotating relative to each other, the impurities that reach the positions of the movable seal ring 3 and the movable seal ring radial portion 21 wear the movable seal ring 3 and the movable seal ring radial portion 21.

Therefore, in order to prevent the foreign matter from reaching the position where the movable seal ring 3 contacts the static seal ring radial portion 11 and the movable seal ring radial portion 21 and reduce the abrasion of the cartridge type bearing seal ring, it is necessary to accommodate the movable seal ring 3 with as much foreign matter as possible, and in one embodiment, the longitudinal section of the movable seal ring 3 has two V-shapes symmetrical to each other, and the V-shape of the longitudinal section of each movable seal ring 3 faces the outer peripheral surface of the cartridge type bearing seal ring.

When the longitudinal section of the movable sealing ring 3 is in two symmetrical V-shapes, and the V-shape of the longitudinal section of each movable sealing ring 3 faces the outer circumferential surface of the cassette bearing sealing ring, the impurities entering the cassette bearing sealing ring will preferentially accumulate at the vertex angle of the V-shape until the V-shape is fully accumulated, and the impurities will not reach the position where the movable sealing ring 3 contacts the radial part 11 of the static sealing ring and the radial part 21 of the movable sealing ring. And because the movable sealing ring 3 keeps rotating all the time in the working state, the impurities are difficult to be stored in the movable sealing ring 3, thereby slowing down the abrasion of the box type bearing sealing ring and prolonging the service life of the box type bearing sealing ring.

Of course, in other embodiments, the longitudinal section of the movable sealing ring 3 may have other shapes, such as: in one embodiment, the movable sealing ring 3 has a rectangular longitudinal section; in another embodiment, the movable sealing ring 3 has a wave-shaped longitudinal section.

In the cartridge bearing seal ring provided by the embodiment of the present invention, the V-shaped opening angle of the longitudinal section of the movable seal ring 3 may be set as required. However, in order to increase the amount of impurities that can be accumulated in the movable seal ring 3 as much as possible, the area of the triangle formed by the V-shape of the longitudinal section of the movable seal ring 3 may be increased. When the opening angle of the V-shape of the longitudinal section of the movable seal ring 3 is too large or too small, the area of the triangle formed by the V-shape of the longitudinal section of the movable seal ring 3 is relatively small, so, in one embodiment, the size of the opening angle of the V-shape of the longitudinal section of the movable seal ring 3 is in the range of 60 ° to 120 °.

Further, in one embodiment, the size of the V-shaped opening angle of the longitudinal section of the movable seal ring 3 is 90 °.

When the size range of the V-shaped opening angle of the longitudinal section of the movable sealing ring 3 is 60-120 degrees, the area of a triangle formed by the V-shaped longitudinal section of the movable sealing ring 3 is larger, more impurities can be accumulated, and therefore the abrasion of the box type bearing sealing ring is favorably reduced. When the size of the V-shaped opening angle of the longitudinal section of the movable seal ring 3 is 90 °, the area of the triangle formed by the V-shaped longitudinal section of the movable seal ring 3 becomes the largest, and the largest amount of impurities can be accumulated.

Of course, the movable seal ring 3 may rotate with the rotation of the movable seal ring 2 in various ways. In one embodiment, the second end of the movable seal ring 3 and the movable seal ring radial portion 21 are in contact with each other and are not fixedly connected through friction transmission.

In this way, the movable seal ring 3 and the movable seal ring 2 are provided separately, so that the processing of the movable seal ring 3 of the cartridge bearing seal ring can be facilitated, and when the use time is long and the wear occurs, only one of the movable seal ring and the movable seal ring can be replaced. On the one hand, the convenience of replacement can be improved, and on the other hand, the cost can be reduced.

When the movable seal ring 3 is in contact with only the stationary seal ring radial portion 11 and the movable seal ring radial portion 21, vertical sliding is likely to occur in the operating state, and abrasion of the cartridge type bearing seal ring is accelerated, so that vertical sliding in the operating state can be reduced when the movable seal ring 3 is kept in contact with the other portions of the bearing. Therefore, in one embodiment, the longitudinal section of the static axial lip 12 has two symmetrical V-shapes, and the V-shape of the longitudinal section of each static axial lip 12 faces the outer circumferential surface of the cartridge bearing seal ring; the V-shaped apex of the longitudinal section of the stationary axial lip 12 is in contact with the V-shaped apex of the longitudinal section of the movable seal ring 3.

Since the V-shaped apex portion of the longitudinal section of the stationary axial lip 12 is in contact with the V-shaped apex portion of the longitudinal section of the movable seal ring 3, the stationary axial lip 12 can support the movable seal ring 3 in an operating state, and the stationary axial lip 12 is prevented from sliding in the direction of the inner ring of the bearing, so that the abrasion of each part of the seal ring of the cartridge bearing can be reduced.

When the movable sealing ring 3 and the movable sealing ring 2 are separately arranged, the movable sealing ring 3 can be processed by adopting an integral forming process. Therefore, in one embodiment, the machining process of the movable sealing ring 3 is an integral molding process. The movable sealing ring 3 is processed by an integral forming process, and all parts of the obtained movable sealing ring 3 are connected and fastened, and the movable sealing ring is simple and convenient to process and low in cost.

In the box-type bearing sealing ring provided by the embodiment of the invention, the material of the movable sealing ring 3 can be selected according to the requirement. Therefore, in one embodiment, the material of the movable sealing ring 3 is rubber. When the movable sealing ring 3 is made of rubber, impurities entering the sealing ring of the box-type bearing can be discharged in time after the movable sealing ring 3 bears deformation and abrasion in a large degree, and the sealing of the bearing is guaranteed, so that the service life of the sealing ring of the box-type bearing is prolonged.

Although the movable seal ring 3 can still perform its corresponding function after undergoing a large degree of deformation and abrasion when the movable seal ring 3 is made of rubber, in order to improve the structural strength of the movable seal ring 3, an elastic portion contacting the stationary seal ring 1 and the movable seal ring 2 and a supporting portion wrapped in the elastic portion may be provided in the movable seal ring 3. The elasticity and the wear resistance of the elastic part are better, so that the durability of the movable sealing ring 3 is improved; the supporting part is wrapped in the elastic part, the structural strength of the supporting part is high, so that the elastic part can be supported, the overall structural strength of the movable sealing ring 3 is improved, and the movable sealing ring 3 can bear stronger acting force without being greatly deformed. Therefore, in one embodiment, the movable sealing ring 3 comprises: the two ends of the elastic part are respectively contacted with the static sealing ring 1 and the dynamic sealing ring 2; the supporting part is wrapped inside the elastic part by the elastic part.

The materials of the elastic part and the supporting part can be selected according to the needs.

In order to improve the sealing performance and durability of the movable seal ring 3, both ends of the elastic portion need to have good elasticity and wear resistance, since both ends of the elastic portion are in contact with the stationary seal ring 1 and the movable seal ring 2, respectively, in an operating state. Therefore, in one embodiment, the material of the elastic portion is rubber. Because the material of elastic part chooses for use rubber for the elasticity and the wearability of elastic part are better, have improved movable sealing ring 3's leakproofness and durability, and then have improved box bearing sealing ring's durable degree.

Since the support portion functions to support the elastic portion, the support function can be more effectively exerted when the structural strength of the support portion is high. In one embodiment, the material of the support is steel. Because the material of the supporting part is steel, the supporting part has higher structural strength, so that the elastic part can be better supported, the overall structural strength of the movable sealing ring 3 is improved, and the movable sealing ring 3 can bear stronger acting force without large deformation.

An embodiment of the present invention further provides a bearing, including: an inner ring; an outer ring; a rolling body; the box type bearing sealing ring; the box type bearing sealing ring is arranged between the inner ring and the outer ring and is positioned at the end part of the rolling body; the inner ring is fixedly connected with a movable sealing ring 2 of the box type bearing sealing ring; and the outer ring is fixedly connected with the static sealing ring 1 of the box-type bearing sealing ring.

It can be seen that the bearing provided by the embodiment of the invention comprises the box type bearing sealing ring with the movable sealing ring, and when the bearing is in a working state, impurities enter between the static sealing ring and the movable sealing ring of the box type bearing sealing ring and are deposited on the movable sealing ring. The movable sealing ring can rotate along with the rotation of the movable sealing ring, so that impurities deposited on the movable sealing ring can rotate along with the movable sealing ring, and when the impurities rotate to the lower part of the bearing, the impurities are separated from the movable sealing ring under the action of gravity and can be discharged from a gap between the static sealing ring and the movable sealing ring. Therefore, the bearing provided by the embodiment of the invention can discharge impurities entering between the static sealing ring and the dynamic sealing ring in time, reduce the probability of the impurities further entering the bearing, slow down the abrasion of the sealing ring of the box type bearing, prolong the service life of the sealing ring of the box type bearing and prolong the service life of the bearing.

Although the embodiments of the present invention are disclosed above, the embodiments of the present invention are not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present embodiments, and it is intended that the scope of the present embodiments be defined by the appended claims.

Claims (10)

1. A cartridge bearing seal ring comprising:

the static sealing ring comprises a static sealing ring radial part and a static axial lip, and the static axial lip is fixedly connected with the static sealing ring radial part;

the dynamic sealing ring comprises a dynamic sealing ring radial part, the dynamic sealing ring radial part is parallel to the static sealing ring radial part, and the static axial lip is contacted with the dynamic sealing ring radial part;

the movable sealing ring is arranged between the radial part of the movable sealing ring and the radial part of the static sealing ring, and is close to one side of the outer peripheral surface of the box-type bearing sealing ring relative to the static axial lip, the first end of the movable sealing ring is contacted with the radial part of the static sealing ring, the second end of the movable sealing ring is contacted with the radial part of the movable sealing ring, and the movable sealing ring is suitable for rotating along with the rotation of the movable sealing ring.

2. The cartridge bearing seal ring according to claim 1, wherein a longitudinal section of said movable seal ring has two V-shapes symmetrical to each other, the V-shape of the longitudinal section of each of said movable seal rings being directed toward an outer peripheral surface of said cartridge bearing seal ring.

3. The cartridge bearing seal ring according to claim 2, wherein the size of the V-shaped opening angle of the longitudinal section of the movable seal ring is in the range of 60 ° to 120 °.

4. The cartridge bearing seal ring of claim 3, wherein the second end of the movable seal ring is frictionally engaged with the radial portion of the movable seal ring.

5. The cartridge type bearing seal ring according to any one of claims 1 to 4, wherein a longitudinal section of said static axial lip has two V-shapes symmetrical to each other, the V-shape of the longitudinal section of each of said static axial lips being directed toward an outer peripheral surface of said cartridge type bearing seal ring;

the V-shaped apex portion of the longitudinal section of the stationary axial lip is in contact with the V-shaped apex portion of the longitudinal section of the movable seal ring.

6. The cartridge bearing seal ring according to claim 5 wherein the machining process of the movable seal ring is an integral molding process.

7. The cartridge bearing seal ring of claim 6 wherein the material of the movable seal ring is rubber.

8. The cartridge bearing seal ring of claim 5, wherein the movable seal ring comprises:

the two ends of the elastic part are respectively contacted with the static sealing ring and the dynamic sealing ring;

the supporting part is wrapped inside the elastic part by the elastic part.

9. The cartridge bearing seal ring according to claim 8, wherein the material of the elastic portion is rubber; the material of the supporting part is steel.

10. A bearing, comprising:

an inner ring;

an outer ring;

a rolling body;

the cartridge bearing seal ring according to any one of claims 1 to 9;

the box type bearing sealing ring is arranged between the inner ring and the outer ring and is positioned at the end part of the rolling body;

the inner ring is fixedly connected with a movable sealing ring of the box type bearing sealing ring;

and the outer ring is fixedly connected with the static sealing ring of the box-type bearing sealing ring.

Images