Pulsation-free high-order elliptical cam pump

Abstract

A pulsation-free high-order elliptical cam pump mainly comprises a motor, a transmission and a cam pump; the cam pump is composed of a high-order elliptical cam rotor A, a high-order elliptical cam rotor B, a high-order elliptical gear pump driving shaft, a high-order elliptical gear driven shaft, a driving synchronous high-order elliptical gear, a driven synchronous high-order elliptical gear anda pump block; the transmission is composed of a driving noncircular gear, a driven noncircular gear, a transmission input shaft, a transmission output shaft and a transmission housing; one end of thetransmission input shaft is connected with an output shaft of the motor through coupler B. On the basis of not changing pump block structure, the pair of external noncircular gear mechanisms are usedto drive the high-order elliptical cam rotor to vary speed and rotate, so that flow pulsation is inhibited; compared with traditional gear pumps, the pulsation-free high-order elliptical cam pump hasthe advantage that the pump herein has larger displacing capacity while inner diameter of a pump cavity and input speed are identical; compared with a cycloidal pump, the pump herein allows its rotorto be easier to process; compared with eccentric pulsating rotor pumps, the pump herein has more stable transient flow.

Description

technical field [0001] The invention belongs to the field of fluid transmission, in particular to a high-order elliptical cam pump with large displacement and no pulsation. Background technique [0002] The high-order elliptical cam pump uses a pair of conjugate high-order elliptical cams as the rotor. When the radius of the pump cavity is constant, the displacement of the high-order elliptical cam pump can be increased by more than 4 times compared with the ordinary circular gear pump. At the same time , Compared with the ordinary arc type rotor lobe pump, the rotor shape of the high-order elliptical lobe pump is easier to process. However, high-order elliptical cam pumps increase displacement and are easy to process, while flow pulsation also increases, resulting in a significant increase in vibration and noise, which cannot be used normally. Therefore, effective smoothing of flow pulsation has become a constraint for high-order elliptical cam Key issues of pump practical...

AI Technical Summary

Problems solved by technology

[0004] In order to stabilize the flow pulsation of the elliptical rotor pump, Tan Weiming and others adopted a flow complementary method, including three elliptical rotors in series and two oval rotors in parallel. These two methods can reduce the pulsation while increasing the displacement. The performance improvement of the pump is of positive significance, but after the introduction of the new rotor, the structure of the pump becomes complicated, the manufacturing difficulty increases, the overall weight also increases, and the interna

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