Sealing structure with clearance compensation function for duplicate gear pump

Abstract

The invention discloses a sealing structure with a clearance compensation function for a duplicate gear pump. The sealing structure comprises a front pump cover, a pump body and a rear pump cover which are assembled in sequence, wherein a rear driving gear and a rear driven gear are arranged in a pump cavity formed by the pump body and the rear pump cover; floating side plates are arranged on thefront end face of the rear driving gear and the front end face of the rear driven gear, and rubber sealing rings are arranged between the floating side plates and the end face of the pump body; and the rubber sealing rings comprise outer sealing ring bodies on the peripheries and inner sealing ring bodies integrally connected to the inner sides of the outer sealing ring bodies, the outer sealing ring bodies are pressed between the pump body and the rear pump cover and used for achieving sealing between the pump body and the rear pump cover, and the inner sealing ring bodies are pressed betweenthe floating side plates and the end face of the pump body and used for providing pressing force for the floating side plates and isolating a low-pressure area from a high-pressure area of the pump.The sealing structure with the clearance compensation function for the duplicate gear pump is simple in structure, economical and practical, and good in sealing effect, and automatic compensation of the end face gap between the front end faces of the gears and the pump body can be achieved without introducing pressure oil.

Description

technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to a sealing structure of a double gear pump with gap compensation function. Background technique [0002] Among the parts that constitute the closed volume of the gear pump, the end face gap between the gear end face and the front and rear cover plates is the most likely to leak under the action of the pump suction and oil pressure difference. Due to the limitation of processing and assembly technology, it is impossible to make the end face clearance value small at present, especially after the wear and tear of use, the clearance will become larger and larger, resulting in increased leakage. In order to maintain a small end face clearance value after wear, at present, the gap compensation method is often used to realize the automatic compensation of the end face gap, but the traditional method needs to introduce pressure oil from the pressure oil chamber to use the pressure...

AI Technical Summary

Problems solved by technology

This method needs to introduce pressure oil, and the structure is relatively complicated

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