Blade non-contact local rapid heating constant speed breaking test technology for casing containment test

Abstract

The invention discloses a blade non-contact local rapid heating constant speed fly-off test technology for casing containment test. A non-contact induction heating coil is installed on the end face of one side of the blade, and cracks are prefabricated on the other side of the blade. When the test rotor accelerates to the target speed and rotates stably, the control equipment is started, and the temperature in the local area of ​​the weakened part of the blade rises rapidly. The ultimate tensile strength decreases, and the blade breaks and flies out under the action of centrifugal force. The method has high speed control accuracy, good reliability, short heating time, simple operation, high test precision, low test period and cost. The blade induction heating fly-off device includes induction heating control equipment, high-frequency induction coils, insulating fixing brackets, cooling water pipes, power lines, transfer ports, and infrared thermometers, etc., to monitor the surface temperature of the blade induction heating area under high-speed rotation Realized by infrared thermometer.

Description

technical field [0001] The invention relates to a blade non-contact local rapid heating constant-speed fly-off test technology for aero-engine fan and compressor casing containment tests, in particular to a blade fly-off speed accurate and predictable based on the principle of prefabricated cracks and induction heating Controlled vane break-off test technology at constant speed for casing containment test. Background technique [0002] For modern aviation aircraft, the flying off of fan blades is one of the most dangerous accidents. Flying off of the fan blades of an aeroengine can lead to engine damage, which may seriously endanger the integrity of the entire aircraft and the safety of passengers. The high-energy flying blade fragments may penetrate the casing, cut off the control cables, and penetrate the fuel tank and cabin. These may cause secondary damage such as aircraft control failure, fuel tank leakage and fire, and loss of pressure in the cabin, resulting in aircr...

AI Technical Summary

Problems solved by technology

However, it is complicated to operate through the lead wire of the conductive slip ring. The lead wire of the thermocouple and the heater are easy to be disengaged or even broken during the high-speed rotation of the rotor. After the blades fly off, the unbalanced load of the rotor will damage the conducti

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