Engine water pump with double seal structure

Abstract

The invention discloses an engine water pump of a double-sealing structure. The engine water pump comprises a pump body, a water pump shaft and a mechanical sealing device and further comprises a coaxially-arranged padding sealing device. The padding sealing device comprises a shaft seal cavity sleeve and padding. The shaft seal cavity sleeve forms radial compression force to the padding. Besides the mechanical sealing device, the padding sealing device is arranged. The padding sealing device can be used together with the mechanical sealing device, so that the sealing performance of the water pump is greatly improved. The padding sealing device can seal the working process of the water pump conveying cooling liquid independently when the mechanical sealing device is damaged due to axial float of the water pump shaft, so that the sealing performance of the water pump is always ensured, and cooling liquid leakage is reduced to a largest degree. Moreover, the shaft seal cavity sleeve forms the radial compression force to the padding, so that the padding is made to be in direct contact with the water pump shaft and rotate along with the water pump shaft to form a water pump shaft protecting layer. Consequently, abrasion on the water pump shaft or a shaft sleeve is reduced, and power consumption is greatly reduced.

Description

technical field [0001] The invention relates to an engine cooling component, in particular to an engine water pump with a double sealing structure. Background technique [0002] The engine water pump is an important component of the water-cooled engine cooling system. Its function is to pump the coolant, so that the coolant flows quickly in the cooling water channel of the engine, so as to take away the heat generated when the engine is working, and maintain the normal operating temperature of the engine. [0003] In the prior art, the engine water pump mostly adopts a mechanical seal method, which consists of a moving ring body and a static ring body. The static ring body is fixed on the pump base, and the moving ring body is a concentric rotating body with the water pump shaft, which rotates at high speed with the water pump shaft. The use of a single mechanical seal structure makes it difficult to guarantee the sealing performance of the engine water pump, because during ...

AI Technical Summary

Problems solved by technology

The use of a single mechanical seal structure makes it difficult to guarantee the sealing performance of the engine water pump, because during the working process of the water pump, due to insufficient machining accuracy, large vibration or large axial displacement of the pump shaft, it is often easy to cause mechanical seals. wear, which affects the sealing effect, causes coolant leakage, and pollutes the engine fuel

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