Hydraulic drive system of inertial friction welding machine for key parts of aero-engine

Abstract

The invention relates to a hydraulic driving system for an inertial friction welding machine of an aero-engine key component. The action process of the hydraulic driving system is realized by a computer, a servo controller, a servo valve and a three-position four-way electro-hydraulic directional control valve through closed-loop control, hydraulic system power is 75 kW, pressure of energy accumulators is 23 MPa, upsetting pressure is 20 MPa, combined oil supply is performed while 4.5 L of high-pressure oil output by the three energy accumulators instantaneously and 2.6 L of high-pressure oil output by a high-pressure high-flow plunger pump are subjected to upsetting, and the requirement of upsetting rate is met; installed power is reduced by three quarters, and the cost performance is remarkable. According to the hydraulic driving system, the installed power is substantially reduced, and energy consumption is reduced; actions such as high-pressure work feed, high-pressure rapid upsetting and rapid retreating and the like of an upsetting oil cylinder are realized, the action process of the upsetting oil cylinder is controlled by the three-position four-way electro-hydraulic directional control valve, displacement and pressure of the upsetting oil cylinder are subjected to closed-loop control by the servo valve, the closed-loop control is realized by the computer through the servo controller according to set values by the aid of real-time detection and real-time feedback, and the system has the advantages that the control precision is high, the values are accurate and free of errors and the actions are stable and reliable.

Description

Technical field [0001] The invention relates to a hydraulic drive system of an inertial friction welding machine for key parts of an aeroengine. Background technique [0002] The hydraulic drive system of the inertial friction welding machine, which is the key part of aero engine, basically adopts a single-pump oil supply method abroad, which requires a high-pressure and large-flow plunger pump, which has high installed power and high cost. There is no such technology in China, but by developing the hydraulic drive system of the inertial friction welding machine, which is a key part of aero-engine, can the technology be developed from scratch and realize the technology upgrade; through the high-pressure large-flow plunger pump and three auxiliary accumulators Reasonable matching and combination of oil supply, greatly reducing installed power and saving energy consumption; the action process is realized by the closed-loop control of the computer, servo controller, servo valve, thr...

AI Technical Summary

Problems solved by technology

[0002] The existing hydraulic drive system of inertial friction welding machine, a key part of aero-engine, basically adopts a single-pump oil supply mode in foreign countries, which requires a high-pressure and large-flow plunger pump, which has high installed power and high cost.

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