Oil seal for engine

Abstract

The invention discloses an oil seal for an engine, belonging to the field of automobile engine accessories, comprising a skeleton ring and a sealing lip formed on the inner wall of the skeleton ring, the cross section of the sealing lip is V-shaped, and the outer circular surface of the skeleton ring has two A ring groove, a metal wire ring is embedded in the ring groove; the skeleton ring is prepared from the following parts by mass: 26-type fluororubber: 60-80 parts, polytetrafluoroethylene 10-20 parts, magnesium oxide: 5-6 parts, calcium hydroxide: 7-9 parts, reinforcing agent carbon black 20-35 parts, barium sulfate: 10-15 parts, processing aid: 2-3 parts, vulcanizing agent: 1.5-2.5 parts, hard 1-2 parts of fatty acid, accelerator: 1.2-1.5 parts; the sealing lip is prepared from the following parts by mass: polytetrafluoroethylene: 60-75 parts, fluororubber 30-45 parts, aramid fiber : 7‑12 parts, glass fiber: 5‑12 parts, graphite: 7‑15 parts. Ensure proper hardness and strength, have high sealing performance, effectively avoid leakage, improve temperature and oil resistance and aging performance, high wear resistance, small friction coefficient, high reliability and durability of oil seal.

Description

technical field [0001] The invention relates to the field of automobile engine accessories, in particular to an engine oil seal. Background technique [0002] Oil seals are important parts in automobile engines, such as oil seals are installed at both ends of the crankshaft. The oil seal is supported by the skeleton, and the rubber wraps the skeleton to form, and the lip is used as the sealing working part, and the wear resistance is very important. The fluorine rubber composition method prepared in the prior art and its process method, due to the material and composition of the composition, the reliability and durability of the skeleton oil seal produced have been improved, but it is still difficult to meet the large mileage without leakage. The need for leaks, and the production cost is high, and the temperature and oil resistance are not good. Contents of the invention [0003] The object of the present invention is to provide an engine oil seal to solve the above-men...

AI Technical Summary

Problems solved by technology

The fluorine rubber composition method and its process method prepared in the prior art, due to the material and composition of the composition, the reliability and durability of the skeleton oil seal produced have been improved, but it is still difficult to meet the large mileage without leakage. Leakage requirements, and the production cost is high, and the temperature and oil resistance are not good