CN2430300Y

CN2430300Y - Oil seal

Info

Publication number: CN2430300Y
Application number: CN00216340U
Authority: CN
Inventors: 徐益淼
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-01-25
Filing date: 2000-01-25
Publication date: 2001-05-16
Anticipated expiration: 2010-01-25

Abstract

The utility model relates to an oil seal, which comprises an outer frame, an inner frame, a polytetrafluoroethylene main lip, and a polytetrafluoroethylene subsidiary lip. One end of each of the polytetrafluoroethylene main lip and the polytetrafluoroethylene subsidiary lip is clamped and positioned between the outer frame and a main frame; all the exposed positions of the outer frame are coated with a rubber layer; a rubber subsidiary lip connected into a whole with the rubber layer is formed at the opposite corner point of the rubber layer and the polytetrafluoroethylene main lip. The utility model overcomes the defects of the common oil seal of poor high and low temperature resistant performance, not strong corrosion resistance, short service life, low linear velocity, and poor sealing performance, and has the advantages of simple structure, long service life, wide operating temperature range, good sealing performance, and low friction coefficient. According to the test, the primary sealing performance of the utility model is 30-50 times higher than the sealing performance of the similar rubber oil seals.

Description

Oil sealing

The utility model relates to a kind of oil sealing.

Known oil sealing, the oil sealing that is suitable for of automobile engine crankshaft particularly, generally be divided into two kinds, a kind of is the caoutchous oil sealing, there is anti-height in it, poor performance at low temperatures, corrosion stability is not strong, service life is short, the motor coefficient is big, use defectives such as the linear velocity degree is low, and another teflon seal, only cladding rubber layer on the cylindrical of outrigger, the time of seasoning is long slightly, oxidative phenomena will occur, influence the use of product, and its secondary lip is to adopt polytetrafluoroethylmaterial material split setting, like this when Front oil seal is installed, easily secondary lip is also seen in, cause leakage of oil, have a strong impact on product design.

The purpose of this utility model is the above-mentioned defective that overcomes prior art, thereby a kind of simple in structure, oil sealing of being difficult for oxidation, good seal performance, long service life is provided.

The utility model comprises outrigger, internal frame, polytetrafluoroethylene master lip and secondary lip, one end of polytetrafluoroethylene master lip and secondary lip is installed between outrigger and the internal frame locatees, the whole cladding rubber layers of the exsertion part of outrigger, the corner that rubber layer is relative with polytetrafluoroethylene master lip forms the secondary lip of the rubber that fuses with rubber layer.

Further illustrate particular content of the present utility model below in conjunction with drawings and Examples.

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

Fig. 2 is the A-A cutaway view of Fig. 1.

As shown in the figure, the utility model comprises outrigger 1, internal frame 2, polytetrafluoroethylene master lip 3 and secondary lip 4, one end of polytetrafluoroethylene master lip 3 and secondary lip 4 is installed in location between outrigger 1 and the interior folder 2, the whole cladding rubber layers 5 of the exsertion part of outrigger 1, rubber layer 5 and polytetrafluoroethylene master lip 3 relative corners form the secondary lip of the rubber that fuses with rubber layer 5.Under running condition,,, keep excellent sealing performance thereby still can tightly embrace axle even after the axle wearing and tearing because intrinsic " memory effect " and the elasticity of polytetrafluoroethylmaterial material itself makes lip can produce a suitable convergent force automatically.

The utility model is by above-mentioned specific design, have that simple in structure, long service life, working temperature range are wide, operating line speed height, sealing property is strong, friction coefficient is low advantage, according to test, its dependable service time was up to 8000 hours, can long-term work under-200 ℃-300 ℃ ambient temperature, linear velocity is up to 30 meter per seconds, and the initial stage sealing property than the high 30-50 of similar rubber oil sea doubly.

Claims

1, a kind of oil sealing, comprise outrigger, internal frame, polytetrafluoroethylene master lip and secondary lip, a polytetrafluoroethylene master lip and an end of cutting lip to pieces are installed between outrigger and the internal frame locatees, it is characterized in that: the whole cladding rubber layers of exsertion part (5) of outrigger (1), the corner that rubber layer (5) is relative with polytetrafluoroethylene master lip (3) forms the secondary lip of the rubber that fuses with rubber layer (5)