CN219366804U

CN219366804U - Low-friction long-service-life rubber oil seal

Info

Publication number: CN219366804U
Application number: CN202320257053.6U
Authority: CN
Inventors: 沈金
Original assignee: Hangzhou Shenjin Rubber And Plastic Products Co ltd
Current assignee: Hangzhou Shenjin Rubber And Plastic Products Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-18
Anticipated expiration: 2033-02-20

Abstract

The utility model discloses a low-friction long-service-life rubber oil seal, which relates to the technical field of oil seals and comprises a framework and a rubber body arranged outside the framework, wherein the rubber body comprises static rubber arranged outside the framework and dynamic rubber arranged inside the framework, a main sealing lip is arranged on the upper part of the inner wall of the dynamic rubber, a plurality of auxiliary sealing lips are also arranged on the inner wall of the dynamic rubber, and the auxiliary sealing lips are positioned below the main sealing lips. According to the utility model, the contact area between the rubber body and the rotating shaft is reduced, so that the friction force between the rubber body and the shaft is reduced, the abrasion generated after the rubber body works with the rotating shaft for a long time is reduced, the service life of the oil seal is further prolonged, the oil seal and the rotating shaft are ensured to be in a lubrication state for a long time, and the friction force between the oil seal and the shaft is further reduced.

Description

Low-friction long-service-life rubber oil seal

Technical Field

The utility model relates to the technical field of oil seals, in particular to a low-friction and long-service-life rubber oil seal.

Background

The oil seal is a sealing member of the mechanism rotation shaft, and has the functions of preventing oil from leaking outwards along the rotation shaft and preventing external sundries from invading the inside of the machine body. As a sealing means for a rotary shaft, there are conventional means such as mechanical seal, contact type and soft packing seal, in addition to a flap oil seal. However, in these sealing devices, the packing seal and the flap oil seal are simple in structure, easy to install, low in cost and wide in application, and have the disadvantage that failure leakage is easy to occur, and the packing seal wears the shaft.

The prior patent (publication number: CN 206246678U) proposes a rotary shaft oil seal, which comprises a fastening spring, an inner framework, a sealing outer ring and a dustproof oil seal lip, wherein the inner framework is arranged on the inner side of the sealing outer ring, one end of the bottom of the inner framework is embedded into the dustproof oil seal lip on one side of the sealing outer ring, one end of the dustproof oil seal lip is wrapped with the fastening spring, the influence of the inner surface quality of the inner framework and the surface quality of the rotary shaft on the sealing effect is reduced, the processing requirement on the surface quality of the inner framework, the assembly process requirement of the oil seal and the manufacturing cost of the oil seal are reduced, the sealing effect is good, impurities such as dust are more difficult to enter lubricating oil, and the rotary shaft oil seal has good economic and social benefits and is suitable for popularization and use.

The oil seal has the following defects in use: the spring is utilized to enable the oil seal to tightly hold the shaft to rotate along with the shaft at a high speed, abrasion is generated due to the fact that friction between the oil seal and the shaft is increased, accordingly, gaps are generated between the oil seal and the rotating shaft, tightness of the oil seal is affected, the service life of the oil seal is shortened, and therefore the low-friction and long-service-life rubber oil seal is provided to solve the problems.

Disclosure of Invention

The utility model provides a low-friction and long-service-life rubber oil seal, which solves the technical problems that a spring is used for tightly holding a shaft of the oil seal to rotate along with the shaft at a high speed, abrasion is generated by the friction between the oil seal and the shaft, so that a gap is generated between the oil seal and a rotating shaft, the tightness of the oil seal is influenced, and the service life of the oil seal is shortened.

In order to solve the technical problems, the low-friction long-service-life rubber oil seal comprises a framework and a rubber body arranged outside the framework, wherein the rubber body comprises static rubber arranged outside the framework and dynamic rubber arranged inside the framework, a main sealing lip is arranged on the upper portion of the inner wall of the dynamic rubber, a plurality of auxiliary sealing lips are further arranged on the inner wall of the dynamic rubber, and the auxiliary sealing lips are located below the main sealing lips.

Preferably, a plurality of oil return grooves are formed in the inner wall of the main sealing lip, and the oil return grooves are spiral.

Preferably, the auxiliary sealing lips are of a sheet structure, and a plurality of auxiliary sealing lips are distributed along the inner wall of the dynamic rubber in an equidistant manner.

Preferably, the rubber body is made of ternary fluororubber.

Preferably, a plurality of grooves are formed in the outer wall of the static rubber, and the grooves are formed in the outer wall of the static rubber at equal intervals.

Preferably, the side wall of the dynamic rubber is provided with an annular cavity, the inside of the annular cavity is provided with oil absorbing cotton, the side wall of the dynamic rubber is also provided with an oil outlet channel communicated with the annular cavity, and the dynamic rubber is also provided with a plurality of oil supply holes communicated with the oil outlet channel.

Preferably, the dynamic rubber upper part is also provided with an oil filling hole communicated with the annular cavity, and a sealing plug is inserted into the oil filling hole.

Preferably, the oil absorbing cotton is of a circular ring structure, and the oil absorbing cotton is made of sponge.

Compared with the related art, the low-friction and long-service-life rubber oil seal provided by the utility model has the following beneficial effects:

1. according to the utility model, the dynamic rubber and the main sealing lip and the plurality of auxiliary sealing lips arranged in the dynamic rubber play a role in sealing with the shaft, and the spring is not used any more, so that the friction torque between the oil seal and the rotating shaft is reduced, the abrasion of the oil seal is reduced, and meanwhile, the contact area between the rubber body and the rotating shaft is reduced through the plurality of auxiliary sealing lips, so that the friction force between the rubber body and the shaft is reduced, the abrasion of the rubber body generated after the rubber body works with the rotating shaft for a long time is reduced, and the service life of the oil seal is prolonged.

2. According to the utility model, a certain amount of lubricating oil can be stored in the dynamic rubber through the matching of the annular cavity and the oil absorbing cotton, and the radial vibration force of the dynamic rubber can squeeze the oil absorbing cotton in the rotating process of the shaft, so that the lubricating oil in the annular cavity flows into the oil outlet channel and slowly enters the outside of the auxiliary sealing lip from the oil supply hole, the lubricating state between the oil seal and the rotating shaft can be ensured for a long time, and the friction force between the oil seal and the shaft is further reduced.

Drawings

FIG. 1 is a schematic diagram of a low friction, long life rubber oil seal;

FIG. 2 is a schematic cross-sectional view of a low friction, long life rubber oil seal;

fig. 3 is an enlarged view of the structure at a in fig. 2.

Reference numerals in the drawings: 1. a skeleton; 2. static rubber; 3. dynamic rubber; 4. a primary seal lip; 5. an oil return groove; 6. a secondary seal lip; 7. an annular cavity; 8. oil absorbing cotton; 9. an oil outlet channel; 10. an oil supply hole; 11. an oil filling hole; 12. a sealing plug; 13. a groove.

Detailed Description

Embodiments of the present utility model are described in detail below.

The first embodiment is shown in fig. 1-3, a low-friction and long-service-life rubber oil seal comprises a framework 1 and a rubber body arranged outside the framework 1, wherein the rubber body comprises static rubber 2 arranged outside the framework 1 and dynamic rubber 3 arranged inside the framework 1, a main sealing lip 4 is arranged on the upper portion of the inner wall of the dynamic rubber 3, a plurality of auxiliary sealing lips 6 are further arranged on the inner wall of the dynamic rubber 3, the auxiliary sealing lips 6 are positioned below the main sealing lip 4, the oil seal is in contact with an installation shell through the static rubber 2, the static sealing function is achieved, the main sealing lips 4 and the auxiliary sealing lips 6 arranged inside the dynamic rubber 3 play a role in sealing a shaft, a spring is not used any more, friction torque between the oil seal and a rotating shaft is reduced on the premise of ensuring sealing, oil seal abrasion is reduced, meanwhile, the contact area between the rubber body and the rotating shaft is reduced through the plurality of the auxiliary sealing lips 6, and abrasion generated after the rubber body works for a long time with the rotating shaft is reduced, and the service life of the oil seal is further improved.

In addition, in order to store the lubricating oil and prevent the lubricating oil from leaking, a plurality of oil return grooves 5 are formed in the inner wall of the main seal lip 4, and the oil return grooves 5 are spiral.

In addition, in order to enhance the sealability between the dynamic rubber 3 and the shaft, the sub-seal lips 6 have a thin plate structure, and a plurality of sub-seal lips 6 are arranged at equal intervals along the inner wall of the dynamic rubber 3.

The rubber body is made of ternary fluororubber, and the ternary fluororubber has the performance characteristics of stable elasticity at a higher temperature, so that the holding force of the dynamic rubber 3 on the shaft is stable and reliable.

In addition, in order to increase the friction force of the outer wall of the static rubber 2 and improve the stability of oil seal installation, a plurality of grooves 13 are formed in the outer wall of the static rubber 2, and the grooves 13 are formed in the outer wall of the static rubber 2 at equal intervals.

In the second embodiment, given by fig. 1-3, a low friction and long service life rubber oil seal, including skeleton 1 and the rubber body of setting outside skeleton 1, the rubber body is including setting up at the outside static rubber 2 of skeleton 1 and setting up at the inside dynamic rubber 3 of skeleton 1, the inner wall upper portion of dynamic rubber 3 is provided with main seal lip 4, dynamic rubber 3 inner wall still is provided with a plurality of vice seal lips 6, vice seal lip 6 is located the below of main seal lip 4, annular chamber 7 has been seted up on the dynamic rubber 3 lateral wall, annular chamber 7's inside is provided with oil absorption cotton 8, still set up on the lateral wall of dynamic rubber 3 with annular chamber 7 intercommunication's oil outlet channel 9, still set up a plurality of oil feed holes 10 with oil outlet channel 9 intercommunication on dynamic rubber 3, on the basis of reducing the frictional force between oil seal and axle, can store a certain amount of lubricating oil in dynamic rubber 3's inside through annular chamber 7 and oil absorption cotton 8 cooperation of setting up, and its radial vibration power can extrude oil absorption cotton 8 in the inside annular chamber 7, make the inside lubricating oil inflow oil outlet channel 9's inside, the inside of annular chamber 7, the inside is opened with annular chamber 7, the oil seal is further from annular chamber 10 to the inside the oil seal is sealed to the inside the side oil seal, the time is long enough to be in between the seal and the further lubrication state, the shaft is guaranteed.

In addition, in order to conveniently add lubricating oil to the inside of the annular cavity 7, an oil filling hole 11 communicated with the annular cavity 7 is further formed in the upper portion of the dynamic rubber 3, and a sealing plug 12 is inserted into the oil filling hole 11.

In addition, in order to enable the oil absorbing cotton 8 to fully absorb lubricating oil, the oil absorbing cotton 8 is of a circular ring-shaped structure, and the oil absorbing cotton 8 is made of sponge.

Working principle: the oil seal is contacted with the installation shell through the static rubber 2, the static seal effect is achieved, the main sealing lip 4 and the plurality of auxiliary sealing lips 6 arranged in the dynamic rubber 3 play a role in sealing a shaft, the spring is not used any more, friction torque between the oil seal and the rotating shaft is reduced on the premise of ensuring sealing, oil seal abrasion is reduced, meanwhile, the contact area between the rubber body and the rotating shaft is reduced through the plurality of auxiliary sealing lips 6, friction force between the rubber body and the shaft is reduced, abrasion generated after the rubber body works for a long time with the rotating shaft is reduced, the service life of the oil seal is further prolonged, a certain amount of lubricating oil can be stored in the dynamic rubber 3 through the cooperation of the annular cavity 7 and the oil absorbing cotton 8, the radial vibration force of the oil absorbing cotton 8 can extrude the oil absorbing cotton 8 in the rotating process of the shaft, the lubricating oil in the annular cavity 7 flows into the oil outlet channel 9, the lubricating force between the oil seal and the rotating shaft can be ensured to be in a lubricating state for a long time by slowly entering the auxiliary sealing lips 6 in the oil supply hole 10, and the friction force between the oil seal and the shaft is further reduced.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a low friction high life rubber oil blanket, includes skeleton (1) and sets up the rubber body in skeleton (1) outside, its characterized in that, the rubber body is including setting up at the outside static rubber (2) of skeleton (1) and setting up in the inside dynamic rubber (3) of skeleton (1), the inner wall upper portion of dynamic rubber (3) is provided with main seal lip (4), dynamic rubber (3) inner wall still is provided with a plurality of vice seal lips (6), vice seal lip (6) are located the below of main seal lip (4).

2. The low-friction long-service-life rubber oil seal according to claim 1, wherein a plurality of oil return grooves (5) are formed in the inner wall of the main sealing lip (4), and the oil return grooves (5) are spiral.

3. The low-friction long-service-life rubber oil seal according to claim 1, wherein the auxiliary sealing lips (6) are of a sheet structure, and a plurality of the auxiliary sealing lips (6) are distributed along the inner wall of the dynamic rubber (3) in an equidistant manner.

4. The low-friction long-life rubber oil seal according to claim 1, wherein the rubber body is made of ternary fluororubber.

5. The low-friction long-service-life rubber oil seal according to claim 1, wherein a plurality of grooves (13) are formed in the outer wall of the static rubber (2), and the grooves (13) are formed at equal intervals along the outer wall of the static rubber (2).

6. The low-friction long-service-life rubber oil seal according to claim 1, wherein an annular cavity (7) is formed in the side wall of the dynamic rubber (3), oil absorbing cotton (8) is arranged in the annular cavity (7), an oil outlet channel (9) communicated with the annular cavity (7) is further formed in the side wall of the dynamic rubber (3), and a plurality of oil supply holes (10) communicated with the oil outlet channel (9) are further formed in the dynamic rubber (3).

7. The low-friction long-service-life rubber oil seal according to claim 6, wherein an oil filling hole (11) communicated with the annular cavity (7) is further formed in the upper portion of the dynamic rubber (3), and a sealing plug (12) is inserted into the oil filling hole (11).

8. The low-friction long-service-life rubber oil seal according to claim 6, wherein the oil absorbing cotton (8) is of a circular ring structure, and the oil absorbing cotton (8) is made of sponge.