A sealing device for an engine water pump shaft-connected bearing

Abstract

The invention belongs to a sealing device of a water pump inner integral ball bearing, and discloses a sealing device of an engine water pump inner integral ball bearing. The sealing device of the engine water pump inner integral ball bearing is used for an automobile engine water pump. According to the technical scheme, a water retaining ring inner diameter protrusion extends into the bearing, and a water retaining ring outer diameter protrusion extends into the bearing and is in clearance seal with the inner diameter of an outer ring; a sealing ring inner lip is inclined into the bearing andis in interference fit with a shaft, a sealing ring outer lip is inclined outwards the bearing and is in interference fit with the inner surface of the water retaining ring inner diameter protrusion,and a sealing ring side lip is inclined toward direction of a bearing outer ring outside the bearing and is in interference fit with the inner side wall of a water retaining ring; and on the side, provided with an impeller, of engine water pump inner integral ball bearing, the outer side wall of the water retaining ring protrudes from the bearing end face on one side of a water seal, and on the other side of the engine water pump inner integral ball bearing, the outer side wall of the water retaining ring is recessed in the bearing end face of the side. The technical problem that the bearingsealing effect and the service life are reduced due to the fact that a coolant of an existing engine water pump inner integral ball bearing enters a water-throwing ring and the sealing performance onthe other side of the bearing is poor is solved.

Description

technical field [0001] The invention belongs to a sealing device for a shaft-connected bearing of a water pump, in particular to a sealing device for a shaft-connected bearing of an engine water pump. Background technique [0002] The shaft-connected bearing of the engine water pump is equipped with a water seal at the end where the impeller is installed. The water seal relies on the friction between the moving ring and the static ring to form a dynamic seal. The engine coolant lubricates the friction surfaces. Therefore, it is inevitable that the coolant will leak into the water between the seal and the bearing. Although the bearing of the engine water pump shaft is sealed with a sealing ring, due to the infiltration effect, the liquid is easy to penetrate into the bearing, and the coolant entering the bearing will damage the bearing lubrication, reduce the reliability of the bearing, and greatly reduce the bearing life. service life. Chinese utility model patent, authori...

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Problems solved by technology

[0003] The invention aims to solve the technical problems that the existing engine water pump shaft-connected bearing cannot prevent the engine coolant from entering the water throwing ring, and the sealing performance of the other side of the bearing installation pulley or the flange is poor, which reduces the sealing effect and service life of the bearing. Provide a sealing device that can effectively enhance the sealing effect, improve the sealing performance on both sides of the bearing, and use a reliable engine water pump shaft-connected bearing

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