Speed regulation type hydraulic motor based on digital distribution

Abstract

A speed regulation type hydraulic motor based on digital distribution which belongs to the technical field of hydraulic motors comprises high-speed electromagnetic switch valves, an electronic control unit, an angle coder, a coder support, an elastic coupling, plunger cavity end caps, a motor end face cover plate, an angular contact ball bearing and a distribution connecting shaft, wherein each two of the ten high-speed electromagnetic switch valves form a group to be arranged on each one of the five plunger cavity end caps, the distribution connecting shaft and the angle coder are respectively connected with the elastic coupling, the angle coder is arranged on the coder support and is connected with the motor end face cover plate, the motor end face cover plate is fixedly arranged on a hydraulic motor body, the input end of the electronic control unit is connected with the angle coder and receives an angle signal, and the output end of the electronic control unit is connected with the high-speed electromagnetic switch valves and outputs a PWM (pulse-width modulation) signal. The speed regulation type hydraulic motor based on digital distribution provided by the invention integrates a distribution function and a speed regulation function, and adopts the high-speed electromagnetic switch valves distributed on the plunger cavity end caps to replace the traditional pintle valve or the traditional thrust plate, so that digital distribution and speed regulation can be formed.

Description

technical field [0001] The invention relates to a device in the technical field of hydraulic motors, in particular to a speed-regulating hydraulic motor based on digital flow distribution. Background technique [0002] Currently widely used crankshaft-connecting rod low-speed high-torque hydraulic motors have two flow distribution methods, radial shaft flow distribution and end face flow distribution, both of which are essentially mechanical position control flow distribution methods; moreover, their structures are very complicated, and the size requirements The precision is high, the machining is difficult, and the speed adjustment of the hydraulic motor cannot be realized. [0003] After searching the existing technical documents, it is found that the Chinese patent publication number CN2079226, the disclosure date is June 19, 1991, and the title of the patent is: an ultra-high pressure valve type flow distribution axial plunger pump. Chinese Patent Publication No. CN2221...

AI Technical Summary

Problems solved by technology

These two patents cannot be directly applied to the crankshaft connecting rod low-speed high-torque hydraulic motor, because the crankshaft-connecting rod low-speed high-torque hydraulic motor is a radial piston hydraulic motor

Chinese Patent Publication No. CN2361871, the date of publication is February 2, 2000. The title of this patent is: valve flow distribution roller plunger pump. Furthermore, the crankshaft-connecting rod structure, this patent cannot be directly applied to the crankshaft-connecting rod low-speed high-torque hydraulic motor

The flow distribution mechanism using a two-position three-way valve cannot perform an emergency stop during the operation of the hydraulic motor without an additional brake device, which is not conducive to the protection of the hydraulic motor

In addition, if an inductive proximity switch is used for position detection, the angle of the crankshaft cannot be accurately obtained, which brings difficulties to the realization of the flow meter.

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