Composite two-lip threaded lip oil seal

Abstract

The invention relates to a composite two-lip threaded lip oil seal, which comprises a metal framework and a rubber body. The inner side of the rubber body is provided with a main lip which has a composite two-lip structure and consists of a threaded lip, a sealing lip and an R-shaped oil storage groove; the threaded lip is positioned at the inner end of the sealing lip; the R-shaped oil storage groove is positioned between the threaded lip and the sealing lip; the thread direction of the threaded lip is opposite to the rotating direction of a working shaft. Because of the threaded multi-lip sealing structure, the oil seal can work under the conditions of high pressure and high rotating speed, has high wear resistance and obvious oil return effect, is more stable and reliable than an oil seal of which the lip is directly provided with an oil return line structure, achieves better durability under the condition that the rubber material is not changed, has longer service life and wider application range, reduces material cost, improves use value and keeps higher economic benefit.

Description

technical field [0001] The invention relates to a double-lip structure oil seal, in particular to a composite double-lip oil seal with a threaded lip structure. Background technique [0002] With the rapid development of science and technology in the 21st century, the technological content of today's automobiles continues to increase, and more pursuit of the power performance of automobiles, through the improvement of engine structure, the automatic adjustment of electronic systems to optimize the maximum output performance, etc., the evolution of these performance improvements It is inseparable from the sealing parts in the engine at all times, and directly affects the entire power system and safety system of the engine, which is related to the sealing performance of the oil seal assembled in each engine. [0003] The higher the performance of the engine, the higher the working pressure, speed and other conditions will be. At present, there are many types of oil seals. Alth...

AI Technical Summary

Problems solved by technology

The general multi-lip structure oil seal adopts the method of increasing the sealing contact area to resist high pressure and increase the amount of wear to meet the harsh working conditions. However, once the first lip seal fails, the lubricating oil will be brought to the next one. In the lip, at high speed, the leaked lubricating oil is easily brought to other sealing surfaces by negative pressure generated by thermal expansion, so it cannot work for a long time, otherwise it will accelerate the penetration of lubricating oil into each lip, and eventually lead to accelerated leakage. seal failure

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