Double-blade swinging hydraulic motor

Abstract

The invention discloses a double-blade swinging hydraulic motor and belongs to the field of hydraulic servo driving. A blade shaft, a first end cover, a first bearing end cover, a first bearing pedestal, a motor cylinder body, a second bearing pedestal, a second bearing end cover, a second end cover, two fixed blades and two conical roller bearings are included. The first bearing pedestal and thesecond bearing pedestal are fixed to the two ends of the cylinder body; the blade shaft is arranged around a center axis of the cylinder body; the shaft shoulder positions of the blade shaft and the first bearing pedestal and the second bearing pedestal are provided with the pair of conical roller bearings used in pairs; the fixed blades are positioned through cylindrical pins; and screws are fixed to the inner wall of the motor cylinder body at the interval of 180 degrees. Optimization design is performed on the blade shaft and the fixed blades, so that the double-blade swinging hydraulic motor is larger in output torque, wider in rotating range, and better in sealing effect relative to a transmission motor.

Description

technical field [0001] The invention belongs to the field of hydraulic servo drives, and in particular relates to a double-blade swing hydraulic motor. Background technique [0002] Hydraulic transmission has the advantages of small size, light weight, high rigidity, high power density, and large output force (torque). Hydraulic servo control has the performance of fast frequency response, wide speed range and low stable speed, which makes hydraulic transmission and its Servo control is widely used in weapons industry, aerospace, shipbuilding industry, equipment manufacturing industry, construction machinery and other fields. The existing double-vane swing hydraulic motor has the output torque and the range of motion of the rotation angle that cannot meet the industrial needs, and the sealing performance is obviously reduced under high pressure. [0003] Chinese patent CN90203233.X proposes a "vane type swing motor", which uses positioning pins to link the stator with the f...

AI Technical Summary

Problems solved by technology

However, this scheme does not take into account the leakage between the root of the rotor and the output shaft, and the leakage between the root of the stator and the cylinder, so there are serious leakage problems

At the same time, the motor also has a series of problems such as too small range of angular motion, too low rated pressure resulting in too small output torque, complex assembly, and bulky (relative to its output torque)

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