CN217927126U

CN217927126U - Oil seal

Info

Publication number: CN217927126U
Application number: CN202221768031.8U
Authority: CN
Inventors: 倪立伟; 周欢; 张晓雷
Original assignee: Shanghai Jieying Sealing Technology Co ltd
Current assignee: Shanghai Jieying Sealing Technology Co ltd
Priority date: 2022-07-09
Filing date: 2022-07-09
Publication date: 2022-11-29
Anticipated expiration: 2032-07-09

Abstract

The utility model relates to a field of sealing device technique especially relates to an oil blanket, and it includes supporting framework, sealing member and from tight spring, be provided with the seal lip on the sealing member, still be provided with the elastic oil seal piece on the supporting framework, the one side slope of elastic oil seal piece bottom towards being close to the seal lip, elastic oil seal piece bottom surface offsets tightly with the rotation axis lateral wall. This application has dual seal, the long-term, effectual sealing performance's of guarantee skeleton oil blanket effect.

Description

Oil seal

Technical Field

The application relates to the technical field of sealing devices, in particular to an oil seal.

Background

A skeleton oil seal, also called skeleton shaft seal, is a device part arranged at the joint between a machine and a rotating shaft thereof and used for preventing liquid such as lubricating oil from overflowing.

In the related art, there is a skeleton oil seal including a support skeleton, a sealing member disposed on the support skeleton, and a self-tightening spring disposed on the sealing member, the sealing member is divided into a bottom portion, an inner waist portion, and an outer waist portion according to different portions, and the self-tightening spring is disposed on the inner waist portion and has an effect of contracting the inner waist portion inward. The inner side of the inner waist part is convexly provided with a sealing lip, the inner diameter of the encircled inner waist part is smaller than the diameter of the shaft under the natural state of the self-tightening spring, and the sealing lip is attached to the outer wall of the rotating shaft to play a role in sealing.

In view of the above-mentioned related technologies, the inventor found that, in the rotation process of the rotating shaft, the friction causes the abrasion of the seal lip, which causes the leakage phenomenon of the framework oil seal due to the reduction of the sealing performance, and the good sealing effect cannot be achieved, and the long-term use requirement cannot be well satisfied.

SUMMERY OF THE UTILITY MODEL

In order to slow down the condition emergence that the wearing and tearing of skeleton oil blanket lead to the weeping, improve sealed effect, this application provides an oil blanket.

The application provides an oil blanket adopts following technical scheme:

the utility model provides an oil seal, includes support chassis, sealing member and from the tight spring, be provided with the seal lip on the sealing member, still be provided with the elasticity oil seal piece on the support chassis, the one side slope of elasticity oil seal piece bottom towards being close to the seal lip, elasticity oil seal piece bottom surface and rotation axis lateral wall offset tightly.

By adopting the technical scheme, the elastic oil seal piece generates elastic deformation and is abutted against the side wall of the rotating shaft, so that the elastic oil seal piece and the sealing lip act together and play a role in double sealing, and the elastic oil seal piece also plays a role in sealing when the sealing lip is worn due to long-term use, and the sealing performance of the framework oil seal is guaranteed;

and through setting up elasticity oil seal lip bottom slope to resume elastic deformation gradually along with wearing and tearing, make and remain throughout between its and the rotation axis and support tightly, make elasticity oil seal lip under long-term wearing and tearing, still keep and the rotation axis lateral wall between the butt, thereby realize the long-term effectual sealed effect of skeleton oil blanket.

Optionally, the elastic oil seal is a polytetrafluoroethylene lip.

By adopting the technical scheme, the polytetrafluoroethylene has the advantages of high wear resistance, elasticity, heat resistance, corrosion resistance and the like, can adapt to the working environment of long-term friction, heat generation and liquid corrosion in the framework oil seal, and is favorable for prolonging the service life of the framework oil seal.

Optionally, an included angle between the inclined part of the elastic oil seal piece and the vertical direction is 45-60 degrees.

Through adopting above-mentioned technical scheme, when the contained angle of the slope of elasticity oil blanket and vertical direction was in above-mentioned within range, the sealed effect of elasticity oil blanket was better. When the included angle is too small, the contact area between the elastic oil seal part and the rotating shaft is small, and when the included angle is too large, the sealing effect of the elastic oil seal part is poor.

Optionally, still be provided with protection framework on support framework's the lateral wall, the elasticity oil seal is located support framework with between the protection framework.

Through adopting above-mentioned technical scheme, the setting of protection skeleton plays the protection to elasticity oil blanket spare and to the reinforcement effect of skeleton oil blanket, prolongs the life of skeleton oil blanket.

Optionally, one side of the elastic oil seal part far away from the support framework is provided with a dust lip, and the bottom surface of the dust lip is attached to the rotating shaft.

Through adopting above-mentioned technical scheme, through setting up the dustproof lip, be favorable to isolated external dust, reduce the interference of external dust to skeleton oil blanket and rotation axis, the normal operating of guarantee rotation axis.

Optionally, the bottom end of the dust lip is inclined towards the side far away from the elastic oil seal piece.

Through adopting above-mentioned technical scheme, prevent the mutual interference between dust lip and the elasticity oil seal piece, guarantee that the dust lip is effectively dustproof, the elasticity oil seal piece is effectively sealed.

Optionally, an included angle between the inclined portion of the dust lip and the inclined portion of the elastic oil seal is 100-150 °.

Through adopting above-mentioned technical scheme, when the rake of dust lip with contained angle between the rake of elasticity oil seal is in above-mentioned within range, light contact between dust lip and the rotation axis this moment has the less wearing and tearing volume of production when effectively dirt-proof, is favorable to prolonging the life of dust lip. When the included angle is too small, the inclined part of the dust lip tends to be in a vertical state, and when the included angle is too large, the inclined part of the dust lip tends to be in a horizontal state, so that the dust lip is not in contact with the rotating shaft easily, and the sealing performance is poor.

Optionally, the width of the inclined portion of the dust lip decreases from top to bottom in sequence.

Through adopting above-mentioned technical scheme, the dust lip bottom contacts with the rotation axis and plays dirt-proof effect, can lead to the wearing and tearing of dust lip at the rotatory in-process of rotation axis, reduces the width of dust lip rake through top-down, reduces the interference value between dust lip and the rotation axis, and then reduces wearing and tearing between each other, is favorable to prolonging the life of skeleton oil blanket.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the elastic oil seal part which is matched with the sealing lip together and has a double sealing effect, the actual sealing effect is provided after the sealing lip is worn, and the long-term and good sealing performance of the framework oil seal is ensured;

2. the included angle between the inclined part of the elastic oil seal part and the vertical direction is controlled, so that the sealing performance of the framework oil seal is favorably ensured;

3. through the contained angle between control dust lip and the elasticity oil seal piece, reduce the interference value between dust lip and the rotation axis, reduce the degree of wear of dust lip, prolong its life.

Drawings

FIG. 1 is a schematic diagram of an overall structure of an oil seal according to an embodiment of the present application;

fig. 2 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A in fig. 1.

Reference numerals: 1. a support framework; 2. a seal member; 3. a self-tightening spring; 4. a sealing lip; 5. an elastomeric oil seal; 6. a protective framework; 7. and (4) dust lip prevention.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses an oil seal. Referring to fig. 1 and 2, the oil seal comprises a supporting framework 1, wherein the supporting framework 1 is a steel framework with an L-shaped cross section. The sealing device comprises a supporting framework 1 and is characterized in that a sealing element 2 is fixed on the inner side wall of the supporting framework 1, the sealing element 2 is a sealing ring with the cross section shaped like Contraband, an annular groove is formed in the inner side wall of the waist part in the sealing element 2, a self-tightening spring 3 is embedded in the annular groove, a sealing lip 4 is convexly formed on the outer side wall of the waist part in the sealing element 2, the sealing element 2 is folded inwards in the self-tightening spring 3 in a natural state, and the sealing lip 4 is abutted against the outer wall of a rotating shaft and has a sealing effect.

Referring to fig. 1 and 2, in order to improve long-term friction and lead to the wearing and tearing back of seal lip 4, the sealed effect of skeleton oil blanket is fixed with elasticity oil seal 5 on the lateral wall of support chassis 1, and the support chassis 1 bottom is stretched out to elasticity oil seal 5 bottom, and elasticity oil seal 5 bottom surface offsets tightly with the rotation axis lateral wall to under the cooperation with seal lip 4, play double seal's effect. In the embodiment of the present application, the elastic oil seal 5 is a teflon lip, and the teflon lip has the advantages of wear resistance, heat resistance, corrosion resistance, high elasticity, and the like, and gives the framework oil seal good sealing performance.

Referring to fig. 1 and 2, the bottom end of the elastic oil seal 5 is inclined toward the side close to the seal lip 4, and the inclined portion of the elastic oil seal 5 forms an angle of 55 ° with the vertical direction. In this application, the contained angle of the rake of elasticity oil seal 5 and vertical direction can be selected at 45-60 within ranges to ensure the good sealing performance of elasticity oil seal 5.

Referring to fig. 1 and 2, in order to improve the structural strength of the framework oil seal, a protective framework 6 is sleeved and fixed on the outer side wall of the support framework 1, and the protective framework 6 is a steel framework with a cross section in a shape of Contraband. The elastic oil seal piece 5 is far away from the side face of the support framework 1, the dust lip 7 is compounded in a hot pressing mode, the dust lip 7 is located between the protection framework 6 and the elastic oil seal piece 5, and the side face, far away from the elastic oil seal piece 5, of the dust lip 7 is fixedly connected with the side wall of the protection framework 6.

Referring to fig. 1 and 2, the bottom end of the dust lip 7 extends out of the bottom end of the protective framework 6, and inclines towards one side away from the elastic oil seal piece 5, the width of the inclined part of the dust lip 7 is reduced from top to bottom in sequence, the bottom surface of the dust lip 7 is attached to the side wall of the rotating shaft, external dust is isolated, and a dust prevention effect is achieved. And the width of the joint of the dust lip 7 and the rotating shaft is reduced, so that the interference value between the dust lip 7 and the rotating shaft is reduced, the abrasion is reduced, and the service life of the dust lip 7 is prolonged.

Referring to fig. 1 and 2, similarly, the angle between the inclined portion of the dust lip 7 and the inclined portion of the elastic oil seal 5 may be selected within the range of 100 to 150 °, 120 ° in the present embodiment.

The implementation principle of an oil blanket of this application embodiment does: in the rotation axis operation in-process, elastic oil seals 5 and seal lip 4 produce elastic deformation and offset tightly with the rotation axis lateral wall, thereby play double seal's effect, thereby when long-term use leads to seal lip 4 wearing and tearing, elastic oil seals 5 resumes elastic deformation gradually along with wearing and tearing, make and remain throughout between the rotation axis to tightly, make elastic oil seals 5 under long-term wearing and tearing, still keep and the rotation axis lateral wall between the butt, thereby realize the long-term effectual sealed effect of skeleton oil blanket, make the skeleton oil blanket have for a long time, good sealing performance.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an oil blanket, includes supporting framework (1), sealing member (2) and self-tightening spring (3), be provided with seal lip (4) on sealing member (2), its characterized in that: the supporting framework (1) is further provided with an elastic oil seal piece (5), the bottom end of the elastic oil seal piece (5) inclines towards one side close to the sealing lip (4), and the bottom surface of the elastic oil seal piece (5) is tightly abutted to the side wall of the rotating shaft.

2. An oil seal according to claim 1, wherein: the elastic oil seal piece (5) is a polytetrafluoroethylene lip.

3. An oil seal as defined in claim 1, wherein: the included angle between the inclined part of the elastic oil seal part (5) and the vertical direction is 45-60 degrees.

4. An oil seal as defined in claim 1, wherein: still be provided with protection skeleton (6) on the lateral wall of support skeleton (1), elasticity oil seal spare (5) are located support skeleton (1) with between protection skeleton (6).

5. An oil seal as defined in claim 1, wherein: one side of the elastic oil seal piece (5) far away from the supporting framework (1) is provided with a dust lip (7), and the bottom surface of the dust lip (7) is attached to the rotating shaft.

6. An oil seal as defined in claim 5, wherein: the bottom end of the dust lip (7) inclines towards one side far away from the elastic oil seal piece (5).

7. An oil seal as defined in claim 6, wherein: the included angle between the inclined part of the dust lip (7) and the inclined part of the elastic oil seal part (5) is 100-150 degrees.

8. An oil seal according to claim 5, wherein: the width of the inclined part of the dust lip (7) is reduced from top to bottom in sequence.