CN200975485Y

CN200975485Y - PTFE oil seal

Info

Publication number: CN200975485Y
Application number: CNU2006200092061U
Authority: CN
Inventors: 杜杰; 孙敢; 孙少俊; 孙志远; 梁延忠
Original assignee: Individual
Current assignee: YanTai Runfuxiang Oil Seal Co Ltd
Priority date: 2006-11-01
Filing date: 2006-11-01
Publication date: 2007-11-14
Anticipated expiration: 2016-11-01

Abstract

The utility model discloses a PTFE oil cover consists of a polyfluortetraethylene lip, a rubber body, an outer framework and an inner framework. The inner framework is positioned in the outer framework to form the oil cover body with only the inside open. The bottom part of the polyfluortetraethylene lip is fixed on the rubber body which covers the outer framework and with the other end extending upwards. The main part of the polyfluortetraethylene lip is provided with a spring which fixes with the inner framework. The utility model can meet different demands of the different oil which can endure the high temperature, the low temperature and low friction force as the polyfluortetraethylene. The utility model overcomes the disadvantage that the polyfluortetraethylene lip can not recovered immediately as the low reboundness after the shape change as the spring in the polyfluortetraethylene lip. Therefore the service life of the oil cover is prolonged. The utility model has the advantages of quick recovery, good sealing effect and long service life.

Description

A kind of PTFE oil sealing

One, technical field

The utility model belongs to back and forth and the oil seal technique field is used in rotation, especially relates to the teflon seal that uses under a kind of high speed, high temperature and the low temperature environment.

Two, background technique

At present, in the design of reciprocal and rotary oil seal, exist many application schemes, but because the influence of its structural reason and material, thereby cause the accommodation of oil sealing narrow, for example on reciprocating oil seal uses, exist low temperature resistant simultaneously, the requirement of high temperature resistant and low-frictional force, the material of reciprocating oil seal use at present can not satisfy above requirement basically simultaneously, back and forth, in the use of rotary oil seal, because the oil seal lip that makes of PTFE (teflon) sheet is being subjected under the situation that the external force effect causes being out of shape, the rebound elasticity of PTFE (teflon) sheet is relatively poor, can not effectively compensate the influence of distortion, thereby cause sealing effect poor.

Three, goal of the invention

The purpose of this utility model be to improve the deficiency of prior art and provide that a kind of oil sealing deformation recovers rapidly, the back and forth efficient and rotation PTFE oil sealing of good sealing effect, long service life.

The purpose of this utility model is to realize like this, a kind of PTFE oil sealing, form by teflon lip sheet, rubber body, outer skeleton and inner frame, be characterized in that the inner frame interference is installed in the outer skeleton, formation has only the main body of the oil sealing of interior side opening, teflon lip sheet lower end is fixed on the rubber body of wrapping up outer skeleton and the other end extends upward, and the outside, main lip position of lip sheet is provided with spring, the inner skeletal fixation of spring.

In order further to realize the purpose of this utility model, can be that the sealing procheilon of teflon lip sheet and the distance of spring center are R, the R value is between-5～5mm.

In order further to realize the purpose of this utility model, can be to form angle α between inboard straight flange of upwardly extending teflon lip sheet oil sealing lip and axis.

In order further to realize the purpose of this utility model, can be to form angle α between 0～60 ° between inboard straight flange of teflon lip sheet oil sealing lip and axis.

In order further to realize the purpose of this utility model, can be that teflon lip sheet thickness is between 1～5mm.

In order further to realize the purpose of this utility model, can be that the procheilon position of teflon lip sheet contacts with axial plane.

In order further to realize the purpose of this utility model, can be teflon lip sheet the procheilon position with spool the width of surface of contact between 0.5～2mm.

In order further to realize the purpose of this utility model, can be that the rubber body of the outer skeleton of parcel is extended the sealed running shaft of contact downwards, form dust excluder lips.

Compared with the prior art the utility model has following distinguishing feature and good effect: the utility model master lip adopts PTFE (teflon) material, PTFE (teflon) material itself has low-frictional force, high temperature resistant, low temperature resistant advantage, so effectively solved the different working condition requirement of adaptation that oil sealing can be wider, increasing a spring at the lip position of oil sealing has effectively avoided PTFE (teflon) material low after generation deformation because of rebound elasticity again, can not in time rapid restorable shortcoming, the increase of spring simultaneously can better improve the agreeableness at oil seal lip position, increases the validity of sealing; The angle α of inboard straight flange of PTFE (teflon) lip sheet oil sealing lip and axis is between 0～60 °, can adopt different angles according to the sealing needs, adjusts surface of contact, increases the service life; PTFE (teflon) lip sheet thickness is between 0.3～3mm; The application operating mode concrete according to oil sealing, distance R between the procheilon of spring center and PTFE (teflon) sheet can on the occasion of or negative value, the R value is generally between-5～5mm, be higher than spring center at the oil sealing procheilon, this kind situation generally is applied to the occasion of big sealing load, this moment R be on the occasion of, be lower than spring center at the oil sealing procheilon, this kind situation generally is applied to not have the occasion of too big sealing load, a spring redeeming, and this moment, R was a negative value; The interface width of PTFE (teflon) sheet procheilon position and axle can keep good sealing effect between 0.5～2mm; The rubber body of the outer skeleton of parcel is extended the sealed running shaft of contact downwards, forms dust excluder lips, plays the dust-tight effect.

Four, description of drawings

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is an another kind of structural representation of the present utility model.

Fig. 3 is another structural representation of the present utility model.

Five, specific embodiments

Embodiment 1, a kind of PTFE oil sealing, referring to Fig. 1, be to be enclosed with rubber body 2 on the outer skeleton 3, inner frame 4 interference are installed in the outer skeleton 3, formation has only the main body of the oil sealing of an inboard side opening, opening is towards running shaft one side, outer skeleton 3 turns over pushes down inner frame 4 in order to fixing inner frame 4, and teflon lip sheet 1 lower end is fixed on the rubber body 2 of the outer skeleton 3 of parcel and the other end extends upward with running shaft and contacts, and is provided with spring 5 outside the main lip position of teflon lip sheet 1, spring 5 is fixed by inner frame 4, the distance at the sealing procheilon of teflon lip sheet 1 and spring 5 centers is R, and the R value is between-5～5mm, and teflon lip sheet 1 thickness is between 1～5mm, the R value is negative value 3mm in the present embodiment, be spring center than procheilon height, lip sheet 1 thickness is 2mm, this constitutes a kind of structure of the present utility model.

Embodiment 2, a kind of PTFE oil sealing, referring to Fig. 2, be on embodiment 1 basis, teflon lip sheet 1 extends the sealed running shaft of contact downwards, form dust excluder lips 6, form angle α between inboard straight flange of upwardly extending teflon lip sheet 1 oil sealing lip and axis, angle α is between 0～60 °, the distance R at the sealing procheilon of lip sheet 1 and spring 5 centers is that promptly spring center is lower than procheilon on the occasion of 3mm in the present embodiment, and lip sheet 1 thickness is 5mm, angle α is 60 °, and other are identical with embodiment 1.

Embodiment 3, a kind of PTFE oil sealing, specifically referring to Fig. 3, be on embodiment 2 basis, the rubber body of the outer skeleton of parcel is extended the sealed running shaft of contact downwards, form dust excluder lips 6, the procheilon position of teflon lip sheet 1 contacts with axial plane, the width of surface of contact is between 0.5～2mm, and the distance R at the sealing procheilon of lip sheet 1 and spring 5 centers is 0 in the present embodiment, and promptly spring center and procheilon are contour, lip sheet 1 thickness is 3mm, angle α is 10 °, and the width of surface of contact is 2mm, and other are identical with embodiment 2.

Claims

1, a kind of PTFE oil sealing, form by teflon lip sheet (1), rubber body (2), outer skeleton (3) and inner frame (4), it is characterized in that inner frame (4) interference is installed in the outer skeleton (3), formation has only the main body of the oil sealing of interior side opening, lip sheet (1) lower end is fixed on the rubber body (2) of wrapping up outer skeleton (3) and the other end extends upward, the outside, main lip position of teflon lip sheet (1) is provided with spring (5), and the inner skeleton of spring (5) (4) is fixing.

2, a kind of PTFE oil sealing according to claim 1 is characterized in that the sealing procheilon of teflon lip sheet (1) and the distance at spring (5) center are R, and the R value is between-5～5mm.

3, a kind of PTFE oil sealing according to claim 1 is characterized in that forming angle α between inboard straight flange of upwardly extending teflon lip sheet (1) oil sealing lip and axis.

4, a kind of PTFE oil sealing according to claim 3 is characterized by between inboard straight flange of teflon lip sheet (1) oil sealing lip and axis and forms angle α between 0～60 °.

5, a kind of PTFE oil sealing according to claim 1 is characterized in that teflon lip sheet (1) thickness is between 1～5mm.

6, a kind of PTFE oil sealing according to claim 1 is characterized in that the procheilon position of teflon lip sheet (1) contacts with axial plane.

7, a kind of PTFE oil sealing according to claim 6, the width of surface of contact that it is characterized in that the procheilon position of teflon lip sheet (1) and axle is between 0.5～2mm.

8, a kind of PTFE oil sealing according to claim 1, the rubber body (2) or the teflon lip sheet (1) that it is characterized in that wrapping up outer skeleton (3) extend the sealed running shaft of contact downwards, form dust excluder lips (6).