CN201753763U

CN201753763U - Low-friction oil seal

Info

Publication number: CN201753763U
Application number: CN2010202065510U
Authority: CN
Inventors: 范德波; 刘跃云
Original assignee: CHENGDU SHENGBANG SEALING MEMBER Co Ltd
Current assignee: CHENGDU SHENGBANG SEALING MEMBER Co Ltd
Priority date: 2010-05-26
Filing date: 2010-05-26
Publication date: 2011-03-02
Anticipated expiration: 2020-05-26

Abstract

The utility model discloses low-friction oil seal, which comprises a framework (1) and a rubber body (2) supported by the framework (1). A main rubber lip (3) with a sealing function is arranged on an inner ring of the rubber body (2), the trend of the cross section of a sealed section of the main rubber lip (3) is in a structure inclined towards a central shaft from bottom to top, and a spiral oil groove (4) is arranged on the inner surface of the main rubber lip (3). The low-friction oil seal has the advantages of simple structure, light integral weight, fine sealing effect, small friction of a sealed surface, and capability of achieving the purpose of reducing energy consumption of an engine.

Description

A kind of low friction oil sealing

Technical field

The utility model belongs to motor car engine component technical field, relates to a kind of low friction oil sealing that is used for the motor car engine main shaft concretely.

Background technique

Automotive industry has played important supporting effect as China's emphasis new industry of shaking in the national economic development.China has become the big automobile making of the first in the world country at present, but because technical merit integral body is comparatively backward, problems such as the ample resources waste of automobile making, environmental pollution also further show especially.Development is put in face of the vast parts manufacturer with the problem of environmental protection harmony.

The automobile engine crankshaft oil sealing is in order to prevent the functor of crankcase lubrication oil leakage, the tradition oil sealing is the structure of rubber, skeleton, spring, although can play the effect of sealing, but because its power of holding tightly to bent axle is bigger, as if it is the same to have added a brake on bent axle, and the motor energy loss is bigger; Part producer has released the oil sealing of rubber, skeleton, PTFE sheet structure, and its power of holding tightly to bent axle reduces to some extent, but its lip seal main body is plastics, the ability of its anti-eccentric shaft and to the follow-up capability of bent axle not as good as rubber oil sea.

The model utility content

The purpose of this utility model has been to provide that a kind of simple in structure, oeverall quality is light, good sealing effect, the little low friction oil sealing of sealing surface friction.

The technical solution of the utility model is as follows:

A kind of low friction oil sealing, comprise skeleton, by the rubber body of described skeleton supporting, being positioned at described rubber body inner ring is the main lip rubber with seal action, the structure of seal section cross section trend for tilting to axis from the bottom up of this main lip rubber, the internal surface of described main lip rubber has spiral helicine oil duct.

Adopt said structure: the sealing principle of this structure is, after oil sealing is packed main shaft into, because the structure of the seal section cross section of main lip rubber trend for tilting to axis from the bottom up, main shaft be to the expansion of main lip rubber, thereby make main lip produce radially package power to main shaft conversely;

The oil sealing of this programme only is 1/4 to 1/5 of a common oil sealing to the main shaft package power, and main lip is that face contacts with the sealing of spindles face, and area of contact is more than 5 times of traditional oil sealing, so the force-bearing situation of oil sealing and main shaft is better than common oil sealing and main shaft.

Spiral helicine oil duct, its oil storage is effective, easily forms oil film at main lip rubber and main shaft surface of contact, and friction ractor reduces greatly.

This scheme has also been simplified the structure of oil sealing simultaneously, and without spring, the oil sealing of same size uses material still less, and weight only is the 70-80% of original oil sealing weight, can realize the light-weight design of Sealing, promotes whole automobile lightweight development; Because oil sealing do not use spring, the seal part only be the sheet rubber that approaches, and only is about the 20-30% of traditional oil sealing to the frictional force (square) of bent axle, can reduce the energy loss of motor significantly, and is significant to energy-saving and emission-reduction;

Main lip rubber is thin rubbery sealed body, and the ability of its anti-crankshaft eccentric oil sealing than before all is greatly improved;

Described rubber body is made by ternary fluorine glue.

The rubber mass material is a ternary fluororubber, and its performance characteristics is for still having stable elasticity when higher temperature; Thereby make main lip reliable and stable to the package power of main shaft.

Beneficial effect: the utility model is simple in structure, oeverall quality is light, the friction of good sealing effect, sealing surface is little, can reach the purpose that reduces the motor energy consumption.

Description of drawings

The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:

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

Fig. 2 be oil sealing with main shaft to the sealing state figure that combines;

Fig. 3 is the enlarged view at A place among Fig. 2.

Embodiment

Embodiment: as shown in Figure 1, 2, 3:

A kind of low friction oil sealing, comprise skeleton 1, lean on the rubber body 2 of described skeleton 1 supporting, being positioned at described rubber body 2 inner rings is the main lip rubber 3 with seal action, the structure of seal section cross section trend for tilting to axis from the bottom up of this main lip rubber 3, the internal surface of described main lip rubber 3 has spiral helicine oil duct 4.Described rubber body 2 is made by ternary fluorine glue.Main lip rubber 3 parts wherein and the main shaft of motor car engine 5 form sealing surface.

Claims

1. one kind is hanged down the friction oil sealing, comprise skeleton (1), lean on the rubber body (2) of described skeleton (1) supporting, it is characterized in that: being positioned at described rubber body (2) inner ring is the main lip rubber (3) with seal action, the structure of seal section cross section trend for tilting to axis from the bottom up of this main lip rubber (3), the internal surface of described main lip rubber (3) has spiral helicine oil duct (4).

2. a kind of low friction oil sealing according to claim 1, it is characterized in that: described rubber body (2) is made by ternary fluorine glue.