CN201100411Y

CN201100411Y - High-pressure resisting oil seal

Info

Publication number: CN201100411Y
Application number: CNU2007201913385U
Authority: CN
Inventors: 常卫华
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-16
Filing date: 2007-11-16
Publication date: 2008-08-13
Anticipated expiration: 2017-11-16

Abstract

The utility model relates to an extreme pressure oil seal, comprising a framework, a rubber body which is wrapped on the surface of the framework, and a locking spring which is arranged on the radial outer side of an inner working face, wherein an inner surface part of the framework is added with a polytetrafluoroethylene gasket which is stuck with the rubber body. The extreme pressure oil seal has the functions of loading, cushioning and decomposing through adding a polytetrafluoroethylene gasket, thereby largely advancing the loading property of the oil seal, preventing the oil seal from extruding, breaking and abrading, and prolonging the utilizing life of the oil seal.

Description

High pressure resistant oil sealing

Technical field

The utility model relates to a kind of shaft sealing oil sealing, the high pressure resistant oil sealing that especially a kind of bearing capacity is big.

Background technique

Be used for the oil sealing that motor, various machinery or analog use at present,, come oil sealing by spring locking rubber by rubber-coated the making in metal frame surface.But rubber abrasive-resistance is relatively poor, non-deformability is little, thereby this oil sealing pressure-bearing is not high, in case inner because refuel too much, rotating speed improves or operating temperature raises causes the pressure increase, the phenomenon that will cause that oil sealing damages, extrudes etc., thereby cause the sealing failure, cause leakage.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of high pressure resistant oil sealing that can improve the bearing capacity of oil sealing greatly at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: comprise skeleton, be coated on the rubber body on skeleton surface, and the locking spring that places the inner working face radial outside, it is characterized in that table portion is provided with and the gluing teflon gasket that is connected together of rubber body in described skeleton.

Compared with prior art, advantage of the present utility model is: because polytetrafluoroethylene (PTFE) has excellent in chemical characteristics such as wear-resisting, withstand voltage, corrosion resistant food, acid resistant alkali, the utility model is by setting up the polytetrafluoroethylene (PTFE) pad, can play the effect of carrying, buffering, decomposition to pressure, thereby improved the bearing capacity of oil sealing greatly, prevent the extruding of oil sealing, damaged and wearing and tearing, prolong the working life of oil sealing.

Description of drawings

Fig. 1 wraps the structural representation of state entirely for the utility model embodiment skeleton.

Fig. 2 partly wraps the structural representation of state for the utility model embodiment skeleton.

Fig. 3 is the utility model embodiment's a profile schematic representation.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

High pressure resistant oil sealing of the present utility model is to have set up a polytetrafluoroethylene (PTFE) pad 4 on the architecture basics of former oil sealing.Concrete Fig. 1-shown in Figure 3, it comprises the metal frame 1 of a circle, be coated with rubber body 2 at metal frame, and table portion also is added with one " O " shape polytetrafluoroethylene (PTFE) pad 4 in metal frame, and this teflon gasket 4 is to be connected together with rubber body is gluing in rubber body thermoforming process.Radial outside at inner working face is equipped with a locking spring 3.Wherein said rubber body can adopt fluorine rubber (FPM) and two kinds of materials of butyronitrile rubber (NBR), and profile can be half bag skeleton or wraps two kinds on skeleton entirely, respectively as Fig. 2, shown in Figure 1.By the design of this kind special construction, improved the bearing capacity of oil sealing, its bearing capacity can reach 5-20Mpa, wherein:

Fluorine rubber: rotating speed≤6000 changes, operating temperature≤250 ℃;

Butyronitrile rubber: rotating speed≤2000 changes, operating temperature≤130 ℃.

Claims

1, a kind of high pressure resistant oil sealing, comprise skeleton (1), be coated on the rubber body (2) on skeleton surface, and the locking spring (3) that places the inner working face radial outside, it is characterized in that: table portion is provided with and the gluing teflon gasket that is connected together of rubber body (4) in described skeleton.