Active Control Mechanism for Quick Response Rotor Support Stiffness

Abstract

The present disclosure provides a quick-response rotor support stiffness active control mechanism, including: an elastic support structure, a rotor bearing, an annular wedge, an action mechanism, a plurality of connecting rods and a recovery mechanism; the rotor bearing is supported by an elastic support structure with an open end The inner rotating surface of the ring; the ring wedge is sleeved on the rotor bearing; one end of the connecting rod is connected with the ring wedge, and the other end of the connecting rod is connected with the action mechanism; the action mechanism is used to move the ring wedge in the axial direction and break away from the elastic The opening of the support structure; the return mechanism is sheathed on the connecting rod, and the return mechanism is used to embed and stably hold the annular wedge in the opening of the elastic support structure. The disclosure controls the stiffness of the supporting structure at the rotor bearing, and when the rotor speed passes the critical speed, quickly controls the support stiffness at the rotor fulcrum to adjust the critical speed, thereby effectively suppressing the short-term resonance when the rotor speed passes the critical speed, and thus Caused rotor friction, fatigue cracks and other problems.

Description

technical field [0001] The disclosure relates to the field of active control of vibration in rotor dynamics of aero-engines (or ground gas turbines), in particular to a fast-response active control mechanism for rotor support stiffness. Background technique [0002] Modern aeroengines (or ground gas turbines) require higher and higher rotor speeds to meet their thrust (or power) requirements, and their rotors are generally flexible rotors, that is, the rotor operating speed is higher than the low-order critical speed. Therefore, during the process of starting or stopping the rotor, the rotor speed must pass its critical speed, resulting in resonance of the rotor system, which threatens the safe and reliable operation of the engine. [0003] In traditional aero-engine rotor design, an elastic support structure is usually used to reduce the support stiffness at the fulcrum of the rotor bearing, change the critical speed of the rotor system, and achieve the purpose of not havin...

AI Technical Summary

Problems solved by technology

However, this technology needs to energize and heat the shape memory alloy wire, and the response time of the control system is long, which is not conducive to the rapid response requirement of the rotor support stiffness control

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