Rigidity and damping adjustable active vibration reduction support

Abstract

The invention discloses a rigidity and damping adjustable active vibration reduction support. The rigidity and damping adjustable active vibration reduction support comprises a fixed support unit and an adjustable support unit, wherein the fixed support unit comprises a base, a bearing, a sleeve and an elastic washer, the bearing is installed in the sleeve, and the elastic washer is installed between the sleeve and the base; the adjustable support unit comprises two internal friction discs, two external friction discs, at least two acting mechanisms and ejecting nuts, the two external friction discs are symmetrically installed at the two ends of the sleeve of the fixed support unit, the two internal friction discs are symmetrically installed on the two side end faces of the base of the fixed support unit, and a primary clearance exists between each external friction disc and the corresponding internal friction disc; and the acting mechanisms are installed in the base and axially fixed through the ejecting nuts. According to the rigidity and damping adjustable active vibration reduction support, on the basis that only one support space is occupied, active control over rotor support rigidity and damping is achieved; and the rigidity and damping adjustable active vibration reduction support is simple and compact in structure, large in adjustment range of the support rigidity and damping and high in reliability.

Description

technical field [0001] The invention belongs to the field of vibration reduction of a rotor system, in particular to an active vibration reduction support with adjustable stiffness and damping for a rotor. Background technique [0002] The vibration problem of the rotor system widely exists in aviation, ships, vehicles, energy and other fields. The vibration will cause fatigue and even failure of the key components of the equipment, which seriously threatens the safety of daily production. The noise it generates is harmful to the physical and mental health of the production site personnel. It also caused great harm, so the vibration control of the rotor system has always been the focus of experts and scholars in related fields at home and abroad. [0003] The vibration reduction design of the rotor support is one of the most commonly used means to achieve rotor vibration reduction. In general, the rotor support can be simplified as a combination of a constant stiffness coef...

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Problems solved by technology

[0005] Most of the existing active damping supports for rotor systems that introduce dry friction dampers contain additional supports. The literature (Ni De. Vibration damping method based on smart springs and its application in multi-pivot shafting [D]. Nanjing: Nanjing University of Aeronautics and Astronautics, 2014.) proposed an active damping support for the rotor system containing friction pairs, including main support, auxiliary support, friction plates and actuators, and Chinese patent ZL200710017593. The electric control device of the branch friction damper includes the static friction plate, the armature, the support and the electromagnet. Existing equipment needs for compact space and quality control

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