CN2302356Y

CN2302356Y - Special-shaped seal components using for gear pump

Info

Publication number: CN2302356Y
Application number: CN 97211603
Authority: CN
Inventors: 白洪涛; 王翼清; 侯金艳
Original assignee: TIANJIN HYDRAULIC MACHINERY (GROUP) CO Ltd
Current assignee: TIANJIN HYDRAULIC MACHINERY (GROUP) CO Ltd
Priority date: 1997-02-05
Filing date: 1997-02-05
Publication date: 1998-12-30
Anticipated expiration: 2007-02-05

Abstract

The utility model relates to a special-shaped seal component for gear pumps. The special-shaped seal component for gear pumps is mainly characterized in that the outer ear of an ear-shaped seal component is provided with a boss, and the cross section of the ear-shaped seal component is L-shaped. The utility model has the advantages that the special-shaped seal component for gear pumps can nicely make use of hydraulic pressure to attach a shaft sleeve face onto a gear face; the amount of compression of the seal component can be met besides only regulating the axial clearance of a pump. Besides, the utility model has a good sealing effect, and meanwhile, can improve the mechanical efficiency and the manufacturability.

Description

A kind of profiled seal spare that is used for gear pump

The utility model belongs to F16J class technology, particularly relates to a kind of profiled seal spare that is used for gear pump.

At the known Sealing that is used in the gear pump, be that to select the cross section for use be rectangle mostly, be shaped as the Sealing of ear shape, because surface of contact own is big, so mechanical efficiency reduces, limit owing to this body structure of Sealing again, so will satisfy the decrement of Sealing merely by the axial clearance of adjusting pump, especially under the effect of pressure oil, easily the rectangular edges corner wear, rubber itself is also easily aging, so along with impacting force diminishes, and bring the deficiency of sealing difference, make its manufacturability also poor.

The purpose of this utility model is to overcome the deficiency in the known technology and provides a kind of axial clearance of strict controlling that do not need just can satisfy good seal performance and the profiled seal spare that is used for gear pump that improves mechanical efficiency.

The purpose of this utility model is achieved in that

At the outer boss that is shaped in one's ear of the Sealing of the ear shape of being made by rubber-plastics material, the sectional shape of Sealing is the L type.

The utlity model has advantage and good effect is:

Owing to have the profiled seal groove on axle sleeve, in its groove sectional shape being installed is the utility model of L type, so need not satisfy the decrement of Sealing merely by the axial clearance of adjusting pump, just can reach the purpose of good airproof performance.Owing in the working procedure of pump, pressure oil can be introduced the seal groove bottom,, all can guarantee good manufacturability and improve mechanical efficiency again, also guarantee high reliability simultaneously so can more effectively utilize hydraulic coupling that axle sleeve end face and gear face are better fitted.

The utility model has following accompanying drawing:

Fig. 1 is the utility model structural representation;

Fig. 2 is the A-A cross-sectional view of Fig. 1;

Fig. 3 is loaded on structural representation in the axle sleeve for the utility model;

Fig. 4 is the B-B cross-sectional view of Fig. 3.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

Referring to Fig. 1 and Fig. 2, ear shape Sealing 1 is to select for use rubber or rubber-plastics material to make, and is shaped on boss 2 at the outer of Sealing 1 in one's ear, and the sectional shape of Sealing is the L type.Referring to Fig. 3 and Fig. 4, Sealing is loaded in the special-shaped groove 4 that has on the axle sleeve 3 again.In the working procedure of pump, because the special-shaped groove on the utility model and the axle sleeve forms the oil pocket of pressure oil jointly, so pressure oil can be incorporated into the special-shaped groove bottom on the axle sleeve, utilized hydraulic coupling that axle sleeve end face and gear face are better fitted well, make gear pump no matter under high pressure and low pressure situation, all can guarantee high volumetric efficiency and mechanical efficiency, good manufacturability guarantees high sealing reliability.

Claims

1. a profiled seal spare that is used for gear pump is made up of the Sealing that is shaped as ear shape that rubber-plastics material is made, and it is characterized in that: be shaped on boss at the outer of ear shape Sealing in one's ear, the sectional shape of Sealing is the L type.