A stepped blade hydraulic machine

Abstract

The invention discloses step blade type hydraulic machinery which comprises a shaft, a front shell, a rear shell, and a stator, a rotor, blades, an inlet oil distribution disc and an outlet oil distribution disc, which are arranged inside the front shell and the rear shell, wherein a plurality of rotor grooves are uniformly formed in the rotor, the blades are movably arranged in the rotor grooves, the thickness of the roots of the blades is more than that of the tops of the blades, bottom cavities are formed between the blades and the bottoms of the rotor grooves, control cavities are formed between the blades and the walls of the rotor grooves, and kidney slots are respectively formed in the inlet oil distribution disc and the outlet oil distribution disc and correspond to the control cavities. The step blade type hydraulic machinery works stably and is little in abrasion because the pressures of the blades on the inner surface of the stator are balanced, and is capable of realizing idling and avoiding reactive loss after unloading so as to ensure low energy loss.

Description

technical field [0001] The invention relates to the technical field of hydraulic machinery, in particular to a stepped blade hydraulic machinery. Background technique [0002] The vane hydraulic pump or motor is small in size, small in moment of inertia, and sensitive in action. It is suitable for occasions with high commutation frequency, but the leakage is large and unstable at low speed. Therefore, vane hydraulic motors are generally used in occasions with high speed, small torque and sensitive action requirements. For traditional hydraulic pumps or motors, in order to ensure that the vane hydraulic motor can start normally after the pressure oil is introduced, the top of the vane must be in close contact with the inner surface of the stator to ensure a good seal, so pre-tension springs are provided at the root of the vane , but in this traditional hydraulic motor and pump, since the blade root is provided with a preload spring, the top of the blade is always in close co...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the vane-type hydraulic machinery in the prior art still needs energy transmission in the non-working stage, and cannot avoid reactive power loss after unloading, and reduce energy loss. The pressure is balanced, the work is stable, the wear is small, and it can realize idling, avoid the reactive power loss after unloading, and reduce the energy loss of the stepped blade hydraulic machinery

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