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

Abstract

The invention relates to a hydraulic drive system for an inertial friction welding machine for key parts of an aerospace engine. The action process of the invention is realized by closed-loop control of a computer, a servo controller, a servo valve, and a three-position four-way electro-hydraulic reversing valve. The hydraulic system has a power of 75kW and energy storage. Device pressure 23M Pa, the upsetting pressure is 20MPa. At the moment of upsetting, 4.5L high-pressure oil output from the three accumulators and 2.6L high-pressure oil output from the high-pressure large-flow plunger pump are combined to supply oil at the same time to meet the upsetting rate requirements; the installed power is reduced by four points. Third, the price / performance ratio is very outstanding. The invention greatly reduces the installed power and saves energy consumption; at the same time, it also realizes the high-pressure working feed of the upsetting cylinder, high-pressure rapid upsetting and rapid retreat. The action process of the upsetting cylinder is controlled by a three-position four-way electro-hydraulic reversing valve. The displacement and pressure of the forging cylinder are controlled by the servo valve in a closed loop. Through real-time detection and real-time feedback, the computer controls the servo controller in a closed loop according to the set value. The system has the advantages of high control precision, accurate numerical values ​​and error-free operation, and stable and reliable action.

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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