Planetary rotor hydraulic machine with two central gearwheels having similar tooth number

Abstract

The paper is devoted to issues of improving the planetary rotor hydraulic machine (PRHM) applied for pumps and hydraulic motors. It is proposed that the same number of waves (and teeth) for the central gearwheel with internal teeth and the central gearwheel with external teeth be provided. First, the maximum parameters of the effective volume of working spaces are achieved, and, second, there is a possibility of a series type connection of two working sections of the hydraulic machine. The latter circumstance essentially allows for increasing the section of channels for feed and return of the working medium, the channels being made in the stationary central gearwheel. This results in increasing the performance of the hydraulic machine in the pump mode and its specific power in the motor mode.