A crescent block assembly for adjusting flow distribution of a pump base and an internal meshing gear pump

Abstract

The application provides a crescent block assembly for adjusting the flow distribution of a pump base, comprising a pump base, a main crescent block and auxiliary crescent blocks arranged on both sides of the main crescent block, the auxiliary crescent blocks are driven to retract and extend by two separately controlled hydraulic oil chambers, so as to change the shape and size of the crescent block, and the crescent block has the function of adjusting the flow distribution, and the harmful problems of excessive unbalanced force and pressure impact caused by the unadjustable flow distribution process of the traditional internal gear pump are solved. The control of the extension and retraction of the auxiliary crescent blocks adopts micro hydraulic cylinders, which can save a large amount of horizontal space, and has the characteristics of compact structure, sensitive and rapid response, stable extension and retraction state, timely response to the adjustment of the flow distribution process. In addition, the application also provides an internal gear pump assembled with the crescent block assembly.

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