An intelligent structural spring-supported dry friction damper

Abstract

The invention discloses an elastic support dry-friction damper with an intelligent structure. The elastic support dry-friction damper comprises a fold-back type elastic support, a supporting base, piezoelectric ceramic, a movable friction plate, a static friction plate, a plurality of strain gauges and three regulating bolts. The two ends of an inner mouse cage elastic support are respectively connected to the outer mouse cage elastic support and a rotary shaft. The end surface of one end, matched with a rolling bearing, of the inner mouse cage elastic support and the movable friction plate are connected through bolts. The end surface of one end, matched with the rolling bearing, of the inner mouse cage elastic support is connected to the movable friction plate. The static friction plate is arranged at one end of the rotary shaft in a sleeving mode. The movable friction plate is arranged on the rotary shaft in the sleeving mode. The outer mouse cage elastic support is arranged at the outer circumference of the inner mouse cage elastic support. After the elastic support dry-friction damper with the intelligent structure is introduced, a rotor is effectively controlled through vibration at a critical rotation speed, and unstable vibration of the rotor and sudden vibration increase caused by other unknown reasons further can be restrained, and therefore, the elastic support dry-friction damper has a wide application prospect in the fields of aviation and spaceflight.

Description

technical field [0001] The invention relates to the field of rotor vibration control, and relates to a dry friction damper device which adopts an intelligent structure to control rotor vibration. Background technique [0002] High-speed rotating machines such as aero-engines often adopt flexible rotor systems, and the working speed of the rotor is often above the first-order or several-order critical speed. The rotor must pass through the critical speed many times during the process of starting, accelerating or decelerating to stop. At this time, the rotor system will resonate, resulting in strong vibration. The vibration of the rotor system is an important factor in determining the reliability of an aero-engine. Therefore, the vibration control of rotor system has become a main research field of rotordynamics. [0003] Dry friction dampers have been widely used as vibration reduction means in engineering fields such as railways, highway bridges, and high-rise buildings. ...

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