A sealed damping and vibration reduction device with eccentric self-adaptive adjustment

Abstract

The invention discloses a seal damping vibration attenuation device with a self-adaptive eccentricity adjustment function, and belongs to the field of vibration control. The seal damping vibration attenuation device with the self-adaptive eccentricity adjustment function comprises a signal detection analysis and control system and an execution system. An active closed-loop control mode is adopted, the radial position of a sealing stator can be adjusted in a self-adaptive mode according to the eccentric magnitude, the rotation speed, the vibration energy and other states of a rotor system, eccentricity of a rotor is reduced, and accordingly sealing excitation force is reduced; and meanwhile, timely and proper damping force is provided to act on the sealing stator, unstable energy of fluid in a sealing gap is dissipated, the action of sealing self-excited force on the rotor is reduced, and accordingly active vibration control over a rotor sealing system is achieved. The seal damping vibration attenuation device with the self-adaptive eccentricity adjustment function can effectively reduce eccentricity caused by different reasons and dissipate the sealing excitation energy generated under different working conditions, vibration control over the rotor sealing system under variable working conditions is achieved, excitation of sealing fluid is restrained, and stability of the rotor is improved.

Description

technical field [0001] The invention is an eccentric self-adaptive adjustment damping and vibration reduction device applied to non-contact sealing of rotating machinery, mainly used in labyrinth seals, honeycomb seals and hole-type seals to suppress the excitation of sealing fluid, and belongs to the technical field of vibration control. technical background [0002] Fluid-excited vibration in the sealing gap is a common problem in impeller machinery such as gas turbines, steam turbines, and centrifugal compressors, which is not easy to solve. With the development of turbomachinery in the direction of high efficiency, stability and high power, the harm of fluid excitation in traditional sealing gaps has become increasingly prominent. It has become one of the key technologies in the development of modern turbomachinery to reduce the leakage of the sealing gap, suppress the fluid excitation in the sealing gap, and ensure the stability of the unit operation. [0003] It is ge...

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Problems solved by technology

[0007] The current method of suppressing the excitation of the sealing fluid is mainly to reduce the circumferential velocity of the fluid, and there are few related technical means for the adjustment of the rotor eccentricity, which is another cause of the excitation.

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