CN219755340U

CN219755340U - Self-lubricating oil seal

Info

Publication number: CN219755340U
Application number: CN202321019163.5U
Authority: CN
Inventors: 吴志毅; 文建兴; 朱涛; 刘雪梅; 朱小飞
Original assignee: Nanjing Shahe Industrial Technology Co ltd; Ningbo Taijiasheng New Material Technology Co ltd
Current assignee: Nanjing Shahe Industrial Technology Co ltd; Ningbo Taijiasheng New Material Technology Co ltd
Priority date: 2023-04-26
Filing date: 2023-04-26
Publication date: 2023-09-26
Anticipated expiration: 2033-04-26

Abstract

The utility model relates to the technical field of oil seals and discloses a self-lubricating oil seal, which comprises an outer oil seal (100), wherein an inner oil seal (200) is connected to the outer oil seal (100), and an oil storage cavity (101) is formed in a region surrounded by the inner oil seal (200) and the outer oil seal (100); at least one oil filler hole (102) is formed in the outer oil seal (100), and the oil filler hole (102) is used for supplementing lubricating medium into the oil storage cavity (101); the outer oil seal (100) is provided with a first supporting piece (300). The utility model has the advantages of good lubrication and sealing performance and capability of supplementing lubricating medium according to the requirement, and is suitable for the application occasions with insufficient lubrication of the oil seal lip under high-speed operation.

Description

Self-lubricating oil seal

Technical Field

The utility model relates to the technical field of oil seals, in particular to a self-lubricating oil seal.

Background

Oil seals are mechanical elements typically used to seal grease (oil is the most common liquid substance in transmission systems, also referred to generally as liquid substance) and isolate the parts of the transmission components that require lubrication from adjacent components or from the external space, and not allow the lubrication to leak.

The more common oil seal is a TC oil seal, and is a rubber-coated double-lip oil seal with a self-tightening spring. In practical use, the oil seal is usually installed in the matched assembly hole, and conventionally, the lip of the oil seal is lubricated by a sealing medium in a soaking or splashing manner. However, in the prior art, especially in the field of fan equipment assembly and application, based on the requirement of tightness, the design of the labyrinth channel and the oil drain hole are matched at the front part of the corresponding transparent cover, so that most of lubricating oil is prevented from entering the sealing part of the oil seal lip to a certain extent, and meanwhile, the body structure of the transparent cover also prevents part of the lubricating oil from entering the part of the oil seal lip, so that the lubricating oil at the part of the oil seal lip is insufficient to a certain extent.

Under the general condition, the oil seal is of a standard structure, and in actual work, the interference between the oil seal and the main shaft is relatively large, so that the radial force borne by the oil seal is large, the friction between the lip and the main shaft is increased, and the linear speed is high due to the general large shaft diameter, so that the abrasion of the oil seal is large; and certain heat can be generated during friction, and when friction is serious, the generated heat can lead to carbonization of part of lubricating oil and even cause carbon deposition.

In order to make up the problem of lubricating oil shortage in the prior art, the radial force is reduced by reducing the interference of assembly so as to reduce friction heat generation and abrasion, but the axial diameter is generally larger, the surface linear speed is higher, and the dynamic eccentricity in the running process is higher, so that the sealing performance is relatively unstable under the condition of small interference, the initial lubricating oil leakage is easy to be caused, and the normal running work of equipment is not facilitated.

Disclosure of Invention

The self-lubricating oil seal provided by the utility model has good lubrication and sealing performance, can supplement lubricating medium according to requirements, and is suitable for application occasions with insufficient lubrication of the oil seal lip under high-speed operation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the self-lubricating oil seal comprises an outer oil seal, wherein an inner oil seal is connected to the outer oil seal, and an oil storage cavity is formed in an area surrounded by the inner oil seal and the outer oil seal; the outer oil seal is provided with at least one oil filling hole which is used for supplementing lubricating medium into the oil storage cavity; the outer oil seal is provided with a first supporting piece.

The principle and the advantages of the scheme are as follows: by adopting the scheme of matching the outer oil seal and the inner oil seal, a double-sealing lip structure is conveniently formed, and the tightness of the whole structure can be improved; the technical scheme that the oil storage cavity is formed by adopting the area surrounded by the inner oil seal and the outer oil seal enables the oil storage cavity to be pre-filled with more lubricating medium so as to realize long-term self-lubrication at the sealing lip under the working condition of insufficient lubrication; through setting up the oil filler point, can be according to the timely lubrication medium of supplying to the oil storage intracavity of demand.

Preferably, as a modification, the side face of the inner oil seal is press-fitted into the outer oil seal.

The beneficial effects are that: by adopting the technical scheme, the connection between the inner oil seal and the outer oil seal is convenient to realize.

Preferably, as a modification, a first elastic member is provided on the sealing lip on the outer oil seal.

The beneficial effects are that: the first elastic piece is arranged, so that the outer oil seal is connected to the main shaft relatively stably, and meanwhile, a first seal is formed between the main lip on the outer oil seal and the main shaft.

Preferably, as a modification, a second elastic member is provided on the sealing lip on the inner oil seal.

The beneficial effects are that: the second elastic piece is arranged, so that the inner oil seal is conveniently and relatively stably connected to the main shaft through the second elastic piece, and meanwhile, a second seal is formed between the main lip on the inner oil seal and the main shaft, so that the tightness of the whole structure is further improved.

Preferably, as a modification, a nipple is mounted on each oil filling hole.

The beneficial effects are that: the corresponding oil nozzle is arranged on the oil filling hole, so that lubricating medium can be conveniently supplemented into the oil storage cavity through the oil nozzle.

Preferably, as an improvement, the inner end face of the inner oil seal is pressed on the inner end face of the outer oil seal.

Preferably, as a modification, the inner oil seal is provided with a second supporting member.

The beneficial effects are that: through setting up the second support piece, be convenient for promote the support strength of interior oil blanket.

Drawings

Fig. 1 is a schematic diagram of a self-lubricating oil seal according to a first embodiment of the present utility model.

Fig. 2 is an exploded view of a self-lubricating oil seal according to an embodiment of the present utility model.

Fig. 3 is a schematic cross-sectional view of a self-lubricating oil seal according to a first embodiment of the present utility model.

Fig. 4 is a schematic cross-sectional view of an outer oil seal according to an embodiment of the present utility model.

Fig. 5 is a schematic cross-sectional view of a self-lubricating oil seal according to a second embodiment of the present utility model.

Fig. 6 is a schematic cross-sectional view of a self-lubricating oil seal according to a third embodiment of the present utility model.

Fig. 7 is a schematic cross-sectional view of a self-lubricating oil seal according to a fourth embodiment of the present utility model.

Fig. 8 is a schematic cross-sectional view of an inner oil seal in a fourth embodiment of the present utility model.

Fig. 9 is an exploded view of a fourth embodiment of the present utility model.

Fig. 10 is a schematic cross-sectional view of a self-lubricating oil seal according to a fifth embodiment of the present utility model.

Fig. 11 is a schematic cross-sectional view of a self-lubricating oil seal according to a sixth embodiment of the present utility model.

Fig. 12 is a schematic view of the structure of the oil nozzle in the present utility model.

Detailed Description

The following is a further detailed description of the embodiments:

the labels in the drawings of this specification include:

100. an outer oil seal; 101. an oil storage chamber; 102. an oil filling hole; 103. the root of the inner hole of the first framework; 104. a first framework opening; 105. a first spring groove; 106. a third spring groove; 110. a nipple; 120. a first elastic member; 130. a third elastic member; 200. an inner oil seal; 201. a second spring groove; 202. the root of the inner hole of the second framework; 203. a second framework opening; 204. a fourth spring groove; 210. a second elastic member; 220. a fourth elastic member; 300. a first support; 400. and a second support.

Example 1

This embodiment is basically as shown in fig. 1-4, and fig. 12:

the self-lubricating oil seal comprises an outer oil seal 100, wherein an inner oil seal 200 is connected to the outer oil seal 100, and an oil storage cavity 101 is formed in an area surrounded by the inner oil seal 200 and the outer oil seal 100; the outer oil seal 100 is provided with at least one oil filling hole 102, and the oil filling hole 102 is used for supplementing lubricating medium into the oil storage cavity 101; the outer oil seal 100 is provided with a first support 300. Specifically, the first support 300 is a metal skeleton, and the inner oil seal 200 and the outer oil seal 100 are rubber members.

In the above-described scheme, six oil holes 102 are uniformly distributed on the side surface of the outer oil seal 100.

Further, in this embodiment, the oil nozzles 110 are installed on each oil filling hole 102, and by installing the corresponding oil nozzle 110 on the oil filling hole 102, the lubrication medium can be more conveniently supplied to the oil storage cavity 101 through the oil nozzle 110.

To facilitate the installation of the first supporting element 300, in this embodiment, the outer oil seal 100 is provided with a first framework inner hole root 103, and the outer oil seal 100 is provided with a first framework mouth 104; one end of the first support 300 is arranged in the first skeleton inner hole root 103, and the other end of the first support 300 abuts against the first skeleton opening 104. Preferably, the vertical cross section of the first support 300 is "L" shaped. Preferably, the first support 300 is integrally formed with the outer oil seal 100 using a vulcanization process.

Specifically, in the present embodiment, the side surface of the inner oil seal 200 is press-fitted into the outer oil seal 100.

It should be noted that: the nipple 110 in this embodiment is a prior art, and the structure and operation thereof will not be described in detail herein.

Example two

This embodiment is substantially as shown in fig. 5:

the present embodiment is different from the first embodiment in that a first elastic member 120 is provided on a sealing lip portion of the outer oil seal 100.

Specifically, in the above-mentioned scheme, the first elastic member 120 is an annular spring, and the outer oil seal 100 is provided with a first spring groove 105 adapted to the first elastic member 120.

Example III

This embodiment is substantially as shown in fig. 6:

the present embodiment is different from the first embodiment in that a second elastic member 210 is provided on a sealing lip portion of the inner oil seal 200.

Specifically, in the above-mentioned scheme, the second elastic member 210 is an annular spring, and the inner oil seal 200 is provided with a second spring groove 201 adapted to the second elastic member 210.

Example IV

This embodiment is substantially as shown in fig. 7-9:

the present embodiment is different from the first embodiment in that the connection positions of the inner oil seal 200 and the outer oil seal 100 are different.

Specifically, the inner end surface of the inner oil seal 200 is press-fitted to the inner end surface of the outer oil seal 100.

Further, in order to enhance the supporting strength of the inner oil seal 200, the inner oil seal 200 is provided with a second supporting member 400, and preferably, the second supporting member 400 is a metal skeleton.

In this embodiment, the inner oil seal 200 is provided with a second skeleton inner hole root 202, and the inner oil seal 200 is provided with a second skeleton opening 203; one end of the second support 400 is disposed within the second carcass bore root 202, and the other end of the second support 400 rests on the second carcass mouth 203. Preferably, the second support 400 is integrally formed with the inner oil seal 200 using a vulcanization process.

Example five

This embodiment is substantially as shown in fig. 10:

the present embodiment is different from the fourth embodiment in that a third elastic member 130 is provided on a seal lip portion of the outer oil seal 100. Specifically, in the above-mentioned scheme, the third elastic member 130 is an annular spring, and the outer oil seal 100 is provided with a third spring groove 106 adapted to the third elastic member 130.

Example six

This embodiment is substantially as shown in fig. 11:

the present embodiment is different from the fourth embodiment in that a fourth elastic member 220 is provided on a sealing lip portion of the inner oil seal 200. Specifically, in the above solution, the fourth elastic member 220 is an annular spring, and the inner oil seal 200 is provided with a fourth spring groove 204 adapted to the fourth elastic member 220.

So that it is mentioned that: by adopting the scheme of matching the outer oil seal 100 and the inner oil seal 200, a double-sealing lip structure is conveniently formed, and the tightness of the whole structure can be improved; by adopting the technical scheme that the oil storage cavity 101 is formed in the area surrounded by the inner oil seal 200 and the outer oil seal 100, more lubricating medium can be pre-filled in the oil storage cavity 101, so that long-term self-lubrication at the sealing lip under the working condition of insufficient lubrication is realized; by providing the oil filling hole 102, the lubricating medium can be timely supplemented into the oil storage cavity 101 according to the requirement.

Specifically, the utility model has the following beneficial effects:

1. due to the adoption of the technical scheme of the oil storage cavity, the lubricating medium is convenient to store, and the condition that the lubricating medium is insufficient can be relatively avoided, so that the oil seal lip can be sufficiently lubricated.

2. Based on the scheme of adopting oil storage chamber and two seal lips, under the circumstances that guarantee can fully lubricate, can reduce the assembly interference between oil blanket and the main shaft according to actual conditions, can reduce radial force to the wearing and tearing have been reduced.

3. Especially under the working conditions of dry grinding caused by insufficient lubrication and higher relative linear speed, based on the scheme of the utility model, not only can full lubrication be realized, but also the phenomenon of carbonization of a lubricating medium caused by high-speed friction heat generation is avoided to a certain extent.

The foregoing is merely exemplary of the present utility model, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present utility model, and these should also be regarded as the protection scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the practical applicability of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a self-lubricating oil blanket, includes outer oil blanket (100), its characterized in that:

an inner oil seal (200) is connected to the outer oil seal (100), and an oil storage cavity (101) is formed in the area surrounded by the inner oil seal (200) and the outer oil seal (100);

at least one oil filler hole (102) is formed in the outer oil seal (100), and the oil filler hole (102) is used for supplementing lubricating medium into the oil storage cavity (101);

the outer oil seal (100) is provided with a first supporting piece (300).

2. A self-lubricating oil seal as defined in claim 1, wherein: the side surface of the inner oil seal (200) is pressed into the outer oil seal (100).

3. A self-lubricating oil seal as defined in claim 1, wherein: a first elastic piece (120) is arranged on a sealing lip part on the outer oil seal (100).

4. A self-lubricating oil seal as defined in claim 1, wherein: and a second elastic piece (210) is arranged on the sealing lip part on the inner oil seal (200).

5. A self-lubricating oil seal as defined in claim 1, wherein: and each oil filling hole (102) is provided with an oil nozzle (110).

6. A self-lubricating oil seal as defined in claim 1, wherein: the inner end face of the inner oil seal (200) is pressed on the inner end face of the outer oil seal (100).

7. The self-lubricating oil seal of claim 6, wherein: the inner oil seal (200) is provided with a second supporting piece (400).