Water pump sealing mechanism

Abstract

The invention discloses a sealing mechanism for a water pump. The sealing mechanism for the water pump comprises a water chamber positioned in the water pump, a driving shaft which extends into the water chamber and is used for driving an impeller of the water pump, an oil chamber positioned at the outer side of the driving shaft, and a sealing device which is arranged between the water chamber and the oil chamber and used for performing shaft sealing on the driving shaft; the sealing device comprises a first framework water seal and a second framework oil seal which are axially arranged from outside to inside; a first lip port for sealing the water chamber is arranged at the first framework water seal; a second lip port for sealing the oil chamber is arranged at the second framework oil seal; the first lip is provided with a polytetrafluoroethylene coating. According to the sealing mechanism for the water pump, the water chamber side is subjected to shaft sealing through the first lip port; the first lip port can be effectively prevented from being worn according to the wear resistance, the high temperature resistance and the low frictional coefficients of polytetrafluoroethylene, and moreover, the water sealing effect is good; the first framework oil seal is arranged at the oil chamber side and used for sealing the oil chamber; the sealing structure is compact, and the assembling is easy, so that the production efficiency can be improved.

Description

technical field [0001] The invention relates to the sealing field, in particular to a water pump sealing mechanism. Background technique [0002] The cylinder of the automobile engine is equipped with a water jacket to cool the cylinder block. The cooling water in the water jacket circulates and cools the cylinder block under the drive of the water pump to ensure that the engine temperature will not be too high; and the power of the water pump is usually directly from the output power of the engine. The drive shaft drives the impeller in the water pump to rotate and then drives the cooling water circulation, and the two ends of the drive shaft respectively pass through the water chamber of the water pump and the oil chamber of the engine, so a shaft seal is arranged on the drive shaft. In the prior art, according to the water The properties of oil and oil require separate water seals and oil seals. The oil seal generally adopts a skeleton oil seal, while the water seal adopt...

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Problems solved by technology

[0002] The cylinder of the automobile engine is equipped with a water jacket to cool the cylinder block. The cooling water in the water jacket circulates and cools the cylinder block under the drive of the water pump to ensure that the engine temperature will not be too high; and the power of the water pump is usually directly from the output power of the engine. The drive shaft drives the impeller in the water pump to rotate and then drives the cooling water circulation, and the two ends of the drive shaft respectively pass through the water chamber of the water pump and the oil chamber of the engine, so a shaft seal is arranged on the drive shaft. In the prior art, according to the water The properties of oil and oil require separate water seals and oil seals. The oil seal generally adopts a skeleton oil seal, while the water seal adopts a structure that matches the moving ring and the static ring. The structure of the water seal is relatively complicated, the volume is large, and the assembly process requires high requirements. low assembly efficiency,

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