Intelligent aviation variable displacement piston pump pressure flow self-adaptive control system

Abstract

The invention discloses an intelligent aviation variable displacement piston pump pressure flow self-adaptive control system. The intelligent aviation variable displacement piston pump pressure flow self-adaptive control system comprises a motor, a variable displacement piston pump, a servo valve, a valve element displacement sensor, a swash plate displacement LVDT sensor, a pressure sensor, a controller, a pressurization oil tank and a shell, wherein the variable displacement piston pump is provided with a variable piston main cylinder, the output end of the motor is connected to the variable displacement piston pump, the variable piston main cylinder moves under the action of oil liquid of the servo valve, the controller receives valve element displacement Sa1, swash plate displacement Sa2, actual pressure Pa, actual current Ia, a pressure instruction Pc, a displacement instruction Vc and a power instruction Wc, and instruction current Ic is output to an electromagnet of the servo valve through operation. According to the intelligent aviation variable displacement piston pump pressure flow self-adaptive control system, triple closed-loop control is adopted, the control precision of an aviation pump is improved, the pump output power is limited by limiting the product of pressure flow, a pressure flow self-adaptive selector is adopted, automatic switching of flow pressure control is completed, overflow heating is avoided, and the efficiency of the aviation pump is improved.

Description

technical field [0001] The invention relates to the field of plunger pump control, in particular to an intelligent aviation variable plunger pump pressure and flow self-adaptive control system. Background technique [0002] The variable displacement plunger pump is a hydraulic pump whose output displacement can be adjusted steplessly by controlling the inclination direction and angle of the swash plate of its variable mechanism. The variable displacement plunger pump has the characteristics of high volumetric efficiency, stable operation, good flow uniformity, low noise and high working pressure, which makes the variable displacement pump applied in more and more occasions. The aviation pump is the core component of the aircraft control system. Due to its narrow space and poor heat dissipation conditions, the aviation pump needs to have small size and high power, high speed and high power density, strong and strong impact resistance, and Strong environmental protection and ...

AI Technical Summary

Problems solved by technology

The first method will obviously cause overflow and heat, which will reduce the system efficiency, and is not suitable for aviation pumps. The second method of adding a constant pressure valve can reduce the overflow to a certain extent, but the pressure required by the system does not reach the constant pressure. When the pressure is set by the valve, the pump will output at the maximum flow rate. In this case, the excess flow rate will also cause additional overflow loss.

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