Radial static pressure balance floating type gear pump

Abstract

The invention relates to a radial static pressure balance floating type gear pump which comprises an upper plate, a middle plate, a lower plate, a driving gear shaft, a driven gear shaft and floating shaft sleeves, wherein the driving gear shaft, the driven gear shaft and the floating shaft sleeve are located in a cavity of the middle plate, the two sides of the middle plate are fixedly connected with the upper plate and the lower plate respectively, the upper plate is provided with a connector and a blanking cap, and gears on the driving gear shaft and the driven gear shaft are meshed with each other. The driving gear shaft and the driven gear shaft are mounted in the floating shaft sleeves at the two ends; each floating shaft sleeve is 8-shaped and comprises two symmetrical circular arc bodies, and the circular arc radius of the middle part of each circular arc body is smaller than the circular arc radiuses of the two sides; two sides of each circular arc body are respectively provided with a first groove and a second groove which have the same radius as the middle circular arc, the length of the first groove is the same as that of the circular arcs on two sides of the circular arc body, and two end areas are communicated; and the length of the second groove is smaller than the circular-arc length of the two sides of each circular arc body; one end of the second groove is communicated with the middle part of the circular arc body. The volume efficiency of the gear pump can be remarkably improved, and oil leakage of the gear pump is reduced.

Description

technical field [0001] The invention relates to a gear pump, in particular to a radial static pressure balanced floating gear pump. Background technique [0002] As a typical hydraulic pump, the gear pump has the advantages of large displacement, high power, compact rhythm, small flow pulsation, and low noise. It is widely used in aerospace, aviation, ships, construction machinery and other fields. A gear pump is usually equipped with a floating sleeve structure, and the gap between the floating sleeve and the gear end surface is reduced by the axial displacement of the floating sleeve. However, under severe working conditions such as high temperature environment (above 100°C), high inlet pressure, large dynamic range of rotational speed, and large vibration level, the housing of the gear pump will be deformed under the action of high-pressure oil, resulting in floating bushings There is jamming between the gear pump and the housing, which cannot adjust the axial clearance,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a radial static pressure balanced floating gear pump, which can solve the problems of jamming of the floating sleeve and increased oil leakage at the end face of the gear under high pressure and high temperature conditions, and has high temperature resistance and long working life. Features of long length and high volumetric efficiency

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