Servo motor pump

Abstract

The invention belongs to the technical field of servo hydraulic pressure, and particularly relates to a servo motor pump. The servo motor pump comprises a shell, an oil distributing disc, a plunger pump core, a motor pump shaft, a motor rotor, a motor stator, a rotary transformer, a mounting seat, a rear end cover, a rotary transformer electric connector, a filter element and a wave spring; the oil distributing disc is fixed to the interior of the shell; the plunger pump core is connected with the motor pump shaft; the wave spring is mounted between the axial direction of a deep groove ball bearing and the mounting seat; the mounting seat is connected with the shell; the filter element is inserted into the shell; the motor rotor is arranged on the motor pump shaft in a sliding and interference manner; the motor stator is fixed to the interior of the shell; a stator of the rotary transformer is fixed to the mounting seat; a rotor of the rotary transformer is fixed to the tail end of the motor pump shaft; and the rear end cover is fixedly connected with the mounting seat. According to the servo motor pump, a power unit with energy converting and controlling functions can be provided, and high-pressure oil with different flow rates and directions can be output to a hydraulic system according to a driving control command.

Description

technical field [0001] The invention belongs to the technical field of servo hydraulics, and in particular relates to a servo motor pump. Background technique [0002] The pump-controlled closed volume servo hydraulic system of power transmission, with its high energy utilization rate, avoids the redundant hydraulic transmission pipeline and has the technical characteristics of high rigidity and high efficiency of hydraulic drive, is widely used in my country's aerospace, aviation, marine Ships, military reconnaissance and other fields have huge military and economic benefits; they have been highly valued by domestic and foreign researchers. [0003] In the power-by-wire pump-controlled volumetric servo hydraulic system, the motor pump is its core power and control unit. Relevant experts, scholars and research institutions at home and abroad have carried out extensive research on motor pumps, including motor vane pumps researched by Lanzhou University of Technology, motor in...

AI Technical Summary

Problems solved by technology

However, the various motor pumps currently studied have the following deficiencies: 1. The motor speed is low, resulting in a relatively low power-quality ratio of the entire motor pump; 2. Generally, the servo motor shaft is connected to the pump shaft through a coupling, resulting in a During the reversing rotation of the pump, the hydraulic pulsation at the zero position is relatively large; 3. Generally, the volumetric efficiency of the developed motor pump cannot be too high. Compared with the traditional plunger pump, the volumetric efficiency is low; style-based

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