External double lip skeleton oil seal

Abstract

A lubricating oil (grease) sealing device for a bearing box or a gear box for a rotating shaft in mechanical equipment, in particular an external double-lip skeleton oil seal. Including the sealing lip, crown, spring groove, limit step, shoulder, back, waist, auxiliary lip, and positioning groove that constitute the integrated structure of the external double-lip skeleton oil seal. The sealing lip is located outside the crown, and the spring groove is located inside the crown. , the auxiliary lip is located on the outside of the waist, and also includes a ring cushion-shaped skeleton and an L-shaped skeleton. As a whole, a spring is arranged in the spring groove. The auxiliary lip is used to prevent impurities such as water vapor and dust from entering the sealing cavity, and the sealing lip is used to prevent the oil (grease) in the sealing cavity from leaking out. This oil seal completely solves the problem of inconvenient disassembly on-line. It has simple structure, low cost, strong adaptability, easy on-line replacement, and can completely replace the standard skeleton 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. ZL201120490390.7) and the self-positioning split skeleton oil seal (patent No. ZL20122...

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.

Images