Internal engaged tooth profile pair

Abstract

The invention discloses an internal engaged tooth profile pair. A single tooth profile of an internal gear comprises a cosine-based composite curve of a straight line section I, a cosine curve I, a straight line section II and a cosine curve II which meet the first-order continuation in a polar coordinate; a single conjugated tooth profile, which corresponds to the single tooth profile of the internal gear, of an external gear is obtained through a engagement theory, so as to form a conjugated tooth profile pair; and a complete conjugated tooth profile pair is obtained by uniformly distributing the single tooth profiles of the internal gear and the external gear respectively around the centers of the internal gear and the external gear according to the gear numbers. The complete conjugated tooth profile pair is obtained by firstly sequentially determining the straight line section I, the cosine curve I, the straight line section II and the cosine curve II which meet the first-order continuation and form the single tooth profile of the internal gear, subsequently converting into a rectangular coordinate system, obtaining the single tooth profile corresponding to the external gear conjugated with the internal gear through the single tooth profile according to the engagement theory so as to form the single conjugated tooth profile pair, and finally uniformly distributing the single tooth profiles of the internal gear and the external gear respectively around the centers of the internal gear and the external gear according to the gear numbers.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and in particular relates to an internal meshing tooth profile pair in the field of fluid machinery. Background technique [0002] Gear pumps mainly include external gear pumps and internal gear pumps. Internal gear pumps are widely used for their advantages of compact structure, small relative slip rate, long life, small flow pulsation, low noise, and high volumetric efficiency at high speed. The core component of the internal meshing pump is a pair of internal and external meshing gear pairs with conjugate tooth profiles. Whether the design of the tooth profile pair is reasonable or not will directly affect the performance of the pump. At present, internal gear pumps mainly include involute internal gear pumps, cycloid internal gear pumps and linear conjugated tooth profile internal gear pumps. The common design method is generally to directly design the tooth profile pair in the Cartesia...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an internal meshing tooth profile pair, which solves the problem that the existing internal meshing gear pair has few design parameters and can only be designed as an internal meshing pump with a symmetrical tooth profile.

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