CN217898774U

CN217898774U - Integrated labyrinth type PTFE framework oil seal used on engine

Info

Publication number: CN217898774U
Application number: CN202221936973.2U
Authority: CN
Inventors: 高文岐; 张义山; 杜喜林
Original assignee: Qingdao Xinkaishi Sealing Industry Co ltd; Gaoke Rubber & Plastic Industrial Co ltd
Current assignee: Qingdao Xinkaishi Sealing Industry Co ltd; Gaoke Rubber & Plastic Industrial Co ltd
Priority date: 2022-07-26
Filing date: 2022-07-26
Publication date: 2022-11-25
Anticipated expiration: 2032-07-26

Abstract

The utility model provides an integrated labyrinth type PTFE framework oil seal used on an engine, which comprises an outer oil seal and an inner oil seal, wherein the inner oil seal is arranged inside the outer oil seal and is connected into a whole through an outer baffle ring; the inner oil seal comprises an inner metal framework and an inner rubber layer, and the inner rubber layer is wrapped outside the inner metal framework. The utility model discloses with the inner rubber layer parcel in the inner metal framework outside, rubber has certain compression capacity, is favorable to carrying out interference fit with the mechanical axis, in addition, because the outer inner rubber layer of wrapping up, so require on the size processing of inner metal framework will reduce, easy processing.

Description

Integrated labyrinth type PTFE framework oil seal used on engine

Technical Field

The utility model relates to a skeleton oil blanket specifically is an integral type labyrinth type PTFE skeleton oil blanket that uses on the engine.

Background

PTFE oil seals are commonly used for engine crankshaft seals. Compared with rubber lip-shaped oil seals, the rubber lip-shaped oil seal has greatly improved temperature resistance, medium resistance, sealing reliability, service life and the like, and has gained good public praise in the industry for over ten years.

The existing PTFE oil seal is mostly split, but the inner oil seal of the split oil seal is in interference fit with a mechanical shaft, so that the split oil seal is difficult to install and has higher requirement on the size processing of the inner oil seal. Therefore, the technical personnel in the field provide an integrated labyrinth type PTFE framework oil seal used on the engine to solve the problems in the background technology.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an integral type labyrinth type PTFE skeleton oil blanket that uses on engine, with the inner rubber layer parcel in the inner metal skeleton outside, rubber has certain compression capacity, is favorable to carrying out interference fit with the mechanical axis, in addition, because the outside is wrapping up in the inner rubber layer, so will reduce to require on the size processing of inner metal skeleton, easy processing to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an integrated labyrinth type PTFE framework oil seal used on an engine comprises an outer oil seal and an inner oil seal, wherein the inner oil seal is arranged in the outer oil seal and is connected into a whole through an outer baffle ring; the inner oil seal comprises an inner metal framework and an inner rubber layer, and the inner rubber layer is wrapped outside the inner metal framework.

As a further aspect of the present invention: and a sealing lip is arranged on the inner wall of the outer oil seal, and one end of the sealing lip is abutted to the outer wall of the inner oil seal.

As a further aspect of the present invention: the sealing lip is made of PTFE material.

As a further aspect of the present invention: and an inner check ring is fixedly connected to the inner wall of the outer oil seal on one side of the sealing lip.

As a further aspect of the present invention: and an annular spiral thread is arranged on one surface of the sealing lip sheet contacting with the outer wall of the inner oil seal.

As a further aspect of the present invention: and a sealing channel is formed between the outer oil seal and the inner oil seal, and a dustproof felt is arranged in the sealing channel.

As a further aspect of the present invention: the outer oil seal comprises an outer metal framework and an outer rubber layer, and the outer rubber layer is wrapped outside the outer metal framework.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this application is outside including metal framework with the parcel of inner rubber layer, and rubber has certain decrement, is favorable to carrying out interference fit, easy to assemble with the mechanical axis.

2. The inner metal framework is wrapped by the inner rubber layer, so that the requirement on size processing of the inner metal framework is reduced, and the processing is easy.

3. This application will be outer oil blanket and interior oil blanket through outer retainer ring even as an organic wholely, can effectually prevent interior oil blanket when the installation with outer oil blanket separation.

4. This application has effectively blockked the pollution of inside fatlute to the seal lip through having add an interior retaining ring in seal lip one side, and then effectively improves the sealing performance of seal lip.

5. This application has increased dustproof felt on the sealed passageway between outer oil blanket and the interior oil blanket, can effectively adsorb and block outside dust and debris entering, improves dustproof and sealing performance.

6. The outer metal framework is wrapped by the outer rubber layer, so that the requirement on size processing of the outer metal framework is reduced, and the outer metal framework is easy to process.

Drawings

Fig. 1 is a schematic structural diagram of an integrated labyrinth type PTFE framework oil seal used on an engine.

In the figure: 1. an outer oil seal; 101. an inner metal skeleton; 102. an inner rubber layer; 2. an inner oil seal; 201. an outer metal skeleton; 202. an outer rubber layer; 3. an outer retainer ring; 4. sealing the lip; 5. an inner retainer ring; 6. dustproof felt.

Detailed Description

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

Referring to fig. 1, in an embodiment of the present invention, an integrated labyrinth type PTFE framework oil seal used in an engine includes an outer oil seal 1 and an inner oil seal 2, where the inner oil seal 2 is disposed inside the outer oil seal 1 and connected to the outer oil seal through an outer retainer ring 3; the inner oil seal 2 comprises an inner metal framework 101 and an inner rubber layer 102, and the inner rubber layer 102 is wrapped outside the inner metal framework 101. The inner rubber layer 102 is wrapped outside the inner metal framework 101, the rubber has a certain compression amount, interference fit with a mechanical shaft is facilitated, and in addition, the inner rubber layer 102 is wrapped outside, so the requirement on size processing of the inner metal framework 101 is reduced, and processing is easy.

In this embodiment: the inner wall of the outer oil seal 1 is provided with a sealing lip 4, and one end of the sealing lip 4 is propped against the outer wall of the inner oil seal 2.

In this embodiment: the sealing lip 4 is made of PTFE material. Compared with the common rubber material, the sealing lip 4 made of PTFE material has better performance, and has high temperature resistance, wear resistance and self-lubricating performance.

In this embodiment: an inner retainer ring 5 is fixedly connected on the inner wall of the outer oil seal 1 at one side of the sealing lip 4. The inner collar 5 can effectively prevent the pollution of the inner oil sludge to the sealing lip 4.

In this embodiment: the sealing lip 4 is provided with an annular spiral line on the surface contacted with the outer wall of the inner oil seal 2, and the oil return effect is achieved.

In this embodiment: a sealing channel is formed between the outer oil seal 1 and the inner oil seal 2, and a dustproof felt 6 is arranged in the sealing channel. The dustproof felt 6 can effectively adsorb and block external dust and sundries from entering, and dustproof and sealing performance is improved.

In this embodiment: the outer oil seal 1 comprises an outer metal framework 201 and an outer rubber layer 202, and the outer rubber layer 202 is wrapped outside the outer metal framework 201. This arrangement makes it possible to reduce the size processing requirements for the outer metal frame 201, and to facilitate the processing.

The utility model discloses a theory of operation is: during the use, carry out interference fit with this PTFE skeleton oil blanket and mechanical axis, because interior metal framework 101 takes the rubber coating form, rubber has certain compressive capacity, is favorable to carrying out interference fit with the mechanical axis, in addition, because this PTFE skeleton oil blanket is the integral type, can effectually prevent interior oil blanket 2 when the installation with outer oil blanket 1 separation. And the PTFE skeleton oil blanket of this application has increased dustproof felt 6 on the sealed passageway between outer oil blanket 1 and interior oil blanket 2, can effectively adsorb and block outside dust and debris entering, improves dustproof and sealing performance to set up an interior retaining ring 5 in sealed lip 4 one side, can effectively block the pollution of inside fatlute to sealed lip 4, and then effectively improve sealed lip 4's sealing performance.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An integrated labyrinth type PTFE framework oil seal used on an engine is characterized by comprising an outer oil seal and an inner oil seal, wherein the inner oil seal is arranged in the outer oil seal and is connected into a whole through an outer retaining ring;

the inner oil seal comprises an inner metal framework and an inner rubber layer, and the inner rubber layer wraps the outer portion of the inner metal framework.

2. The integrated labyrinth type PTFE framework oil seal used on the engine as claimed in claim 1, wherein a sealing lip is arranged on the inner wall of the outer oil seal, and one end of the sealing lip abuts against the outer wall of the inner oil seal.

3. The one-piece labyrinth type PTFE framework oil seal used on the engine as claimed in claim 2, wherein the sealing lip is made of PTFE material.

4. The integrated labyrinth type PTFE framework oil seal used on the engine as claimed in claim 2, wherein an inner retainer ring is fixedly connected to the inner wall of the outer oil seal on one side of the sealing lip.

5. The integrated labyrinth type PTFE framework oil seal used on the engine as claimed in claim 2, wherein the face of the sealing lip contacting with the outer wall of the inner oil seal is provided with an annular spiral thread.

6. The integrated labyrinth type PTFE framework oil seal used on the engine as claimed in claim 1, wherein a sealing channel is formed between the outer oil seal and the inner oil seal, and a dustproof felt is arranged in the sealing channel.

7. The integrated labyrinth type PTFE framework oil seal used on the engine as claimed in claim 1, wherein the outer oil seal comprises an outer metal framework and an outer rubber layer, and the outer rubber layer is wrapped outside the outer metal framework.