Outside mounted type two-lip framework oil seal

Abstract

The invention relates to a bearing box or gear box lubricating oil (grease) sealing device for a rotating shaft of mechanical equipment, in particular to an outside mounted type two-lip framework oil seal. The outside mounted type two-lip framework oil seal comprises a sealing lip, a crown part, a spring groove, a limiting step, a shoulder part, a back part, a waist part, a secondary lip and a locating groove, wherein an integral structure of the outside mounted type two-lip framework oil seal is formed by the sealing lip, the crown part, the spring groove, the limiting step, the shoulder part, the back part, the waist part, the secondary lip and the locating groove; the sealing lip is arranged on the outer side of the crown part; the spring groove is formed in the inner side of the crown part; the secondary lip is arranged on the outer side of the waist part; the outside mounted type two-lip framework oil seal further comprises a circular pad type framework and an L-shaped framework; the limiting step is integrally connected with the shoulder part, the back part, the secondary lip, the waist part, the crown part, the sealing lip, the spring groove, the circular pad type framework and the L-shaped framework; a spring is arranged in the spring groove. The secondary lip is used for preventing external impurities such as water vapor and smoke from entering a sealing cavity; the sealing lip is used for preventing oil (grease) in the sealing cavity from leaking outside. The oil seal thoroughly solves the problem of inconvenient online dismounting, has the advantages of simple structure, low cost, high adaptability and convenience in online replacement, and can totally replace a standard framework oil seal.

Description

technical field [0001] The invention relates to a lubricating oil (grease) sealing device for a bearing box or a gear box of a rotating shaft in mechanical equipment, in particular to an externally mounted double-lip skeleton oil seal. Background technique [0002] The oil seals on the market (as stipulated in the national standard GB / T9877.1-9877.3--1998) have an overall annular closed structure, which has good overall sealing performance and is easy to install, but it is difficult to disassemble online. When disassembling on-line, special tools must be used to dig it out from the narrow space between the sealing chamber and the rotating shaft, which is very difficult and easy to cause damage to the rotating shaft. Therefore, the traditional standard skeleton oil seal is no longer suitable for the requirements of online replacement. [0003] The double-split combined oil seal (Patent No. ZL 201120490390.7) and the self-positioning split skeleton oil seal (Patent No. ZL...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of inconvenient online disassembly in the prior art, and provide a sealing lip, a crown, a spring groove, a ring pad-shaped frame, an L-shaped frame, a limit step, a shoulder, a back, a waist, an auxiliary The lip and the positioning groove are connected as one structure, and the spring is installed in the spring groove to apply pre-tightening force to the sealing lip, which is easy to install and disassemble, and has a reliable seal.

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