Rubber sealing ring

Abstract

The invention discloses a rubber sealing ring. The rubber sealing ring comprises an annular skeleton 2, a silica layer, an inner sealing ring 1 and an outer sealing ring 3, wherein the section shape of the annular skeleton 2 is L-shaped; the outer side of the annular skeleton 2 is coated with the silica layer; the inner sealing ring 1 and the outer sealing ring 3 are arranged on the inner side of the annular skeleton 2; the silica layer, the inner sealing ring and the outer sealing ring are integrally formed; the silica layer, the inner sealing ring and the outer sealing ring are formed by mixing the following raw materials in parts by weight: 100 parts of raw rubber, 20 to 25 parts of an active agent, 5 parts of a plasticizer, 3 parts of an anti-ageing agent, 10 parts of a reinforcing agent, 10 parts of a plasticizer, 5 parts of an accelerant and 1 part of a vulcanizing agent; the inner sealing ring and the outer sealing ring are arranged on the inner side and the outer side of the L-shaped skeleton correspondingly; the inner sealing ring realizes oil seal and the outer sealing ring realizes gas seal; meanwhile, the inner sealing ring and the outer sealing ring adopt rubber materials with high oil resistance, have high surface polarity and high stability, are insusceptible to swelling, and meet the requirements of oil seal and gas seal.

Description

technical field [0001] The invention relates to the technical field of sealing rings, in particular to a rubber sealing ring. Background technique [0002] The rubber sealing ring is an annular cover composed of one or several parts, which is fixed on a ring or washer of the bearing and contacts with another ring or washer or forms a narrow labyrinth gap to prevent the leakage of lubricating oil and the intrusion of foreign objects. Rubber sealing rings can be divided into O-shaped sealing rings, Y-shaped sealing rings and V-shaped sealing rings according to their cross-sectional shapes. However, the above-mentioned various sealing rings can only achieve a single function, such as oil seal or air seal. The sealing of the rotating shaft in the occasion needs to apply radial force to the rotating shaft to prevent the leakage of fluid or lubricating oil, and also to prevent the intrusion of dust or sand from the outside. In order to achieve the above functions, the end of the e...

AI Technical Summary

Problems solved by technology

[0002] The rubber sealing ring is an annular cover composed of one or several parts, which is fixed on a ring or washer of the bearing and contacts with another ring or washer or forms a narrow labyrinth gap to prevent the leakage of lubricating oil and the intrusion of foreign objects. Rubber sealing rings can be divided into O-shaped sealing rings, Y-shaped sealing rings and V-shaped sealing rings according to their cross-sectional shapes. However, the above-mentioned various sealing rings can only achieve a single function, such as oil seal or air seal. The sealing of the rotating shaft in the occasion needs to apply radial force to the rotating shaft to prevent the leakage of fluid or lubricating oil, and also to prevent the intrusion of dust or sand from the outside. In order to achieve the above functions, the end of the existing rotating shaft is equipped with two The seal ring is used to realize the functions of oil seal and air seal respectively, which is inconvenient to install and maintain, and the existing seal ring has poor oil resistance and short service life

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