Electromagnetic self-balance dry-friction damper with elastic bearing and used for rotor bearing structure of rotary machine

Abstract

The invention discloses an electromagnetic self-balance dry-friction damper with an elastic bearing and used for a rotor bearing structure of a rotary machine. The electromagnetic self-balance dry-friction damper with the elastic bearing and used for the rotor bearing structure of the rotary machine comprises the elastic bearing comprises the elastic bearing, a dynamical friction sheet, a dynamical friction sheet support, a static friction sheet, a static friction sheet support, a force sensor and an electromagnet assembly. The dynamical friction sheet is installed on the dynamical friction sheet support of the elastic bearing, and carries out radial movement along with the elastic bearing. The static friction sheet is located at one side of the dynamical friction sheet, and capable of moving in the axial direction. A control current is applied onto a coil on the electromagnet assembly, an axial attraction force is generated on the dynamical friction sheet, the dynamical friction sheetis close to the static friction sheet, a positive pressure is generated on a friction pair formed by the dynamical friction sheet and the static friction sheet, and then a friction force is generated, so that control over the vibration and stability of a rotor system of the rotary machine is realized. Real-time accurate control can be carried out on the friction force between the dynamical friction sheet and the static friction sheet through the control current in the electromagnet coil; and the electromagnetic self-balance dry-friction damper with the elastic bearing and used for the rotor bearing structure of the rotary machine has a wide application prospect in the field of active control over the vibration and stability of the rotor system of the rotary machine.

Description

technical field [0001] The invention relates to the field of rotating machinery, in particular to an electromagnetic self-balancing elastically supported dry friction damper of a rotating machinery rotor supporting structure. Background technique [0002] With the development of various rotating machinery, such as aeroengines, gas turbines, energy recovery devices, etc., towards high power, high speed, and light structure, the vibration of the rotor system is more sensitive to various excitation factors, especially for those working in a For the flexible rotor system above the first or several critical critical speeds, how the rotor system can pass through each order of bending critical speed with less vibration is a very important issue. Due to its simple structure and the ability to easily adjust the critical speed of the rotor system, the elastic support structure has been widely used in the support structure of many rotating machinery rotors. However, the general elasti...

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Problems solved by technology

[0004] In order to overcome the deficiencies in the prior art, such as the complex structure of the dry friction damper, the small adjustment range of the friction force, the difficulty in preci

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