Automobile water pump bearing sealing device

Abstract

The invention relates to an automobile water pump bearing sealing device. A sealing member of the device is arranged at a joint on an open end part of a space formed between a rotating shaft and a bearing and arranged in a sealing groove on the outer ring of the bearing under the action of pressure. The sealing member consists of a sealing body, a metal frame and a water throwing ring; the sealing body has a three-lip structure, is elastically pressed against the water throwing ring 30 through a main lip and a second secondary lip respectively and is sealed by contacting a first secondary lip with the bearing; a circular arc water discharge groove is formed on the outer ring of the water throwing ring; centrifugal water throwing effect is produced during rotation, so that substances such as water vapor and the like can be effectively prevented from being immersed into the bearing; the device is used in a high temperature environment so as to prevent lubricating grease leakage caused by pressure rise due to heating inside the bearing; meanwhile, a sealing ring does not deform when contacted with cold water, so that the absorption phenomenon of vapor and dust outside the bearing, which is caused by abrupt pressure drop inside the bearing, can be avoided when the temperature of the bearing is decreased to room temperature from a high temperature.

Description

technical field [0001] The invention relates to a sealing device for an automobile water pump bearing, in particular to a sealing device for an automobile water pump bearing with a three-lip structure and a novel water throwing ring. Background technique [0002] Commonly used automotive water pump bearing sealing devices such as figure 1 As shown: the water pump bearing is evenly installed with a plurality of rolling elements 1b (ie steel balls) between the rotating shaft 3 and the bearing outer ring 1a, and its function is to bear the load; a cage 1c is used to fix the above rolling elements and separate them open. A seal 2 is composed of a rubber seal 2a and a metal skeleton 2b, wherein the rubber seal 2a is installed in the seal groove 1d of the bearing outer ring 1a to prevent the seal from moving; the lip of the rubber seal 2a is close to Shaft distribution, the main lip 2d is in interference fit with the surface of the rotating shaft 3 to prevent the leakage of grea...

AI Technical Summary

Problems solved by technology

[0006] In view of the importance of water pump bearing seals, and the fact that the current bearing seal structure is still not the best, it is necessary to develop a new type of automobile water pump bearing seal structure with better sealing effect and water rejection effect.

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