Rotor adaptive continuous frequency shifting tuned mass damper (TMD) for rotary machinery

Abstract

Disclosed is a rotor adaptive continuous frequency TMD for rotary machinery. The TMD is in a cage structure and comprises a mechanical structure and a control system. The mechanical structure comprises a connection transmission mechanism and a rigidity continuous adjustable tuning mass mechanism. According to the damper, a screw is driven by a stepping motor to rotate, an annular mass block is pulled by a nut matched with the screw to reciprocate to adjust the frequency of the TMD to achieve real-time tracking continuous adjustment of the inherent frequency of a TMD subsystem, so that the frequency of the subsystem is consistent with the main vibration frequency of the rotor to be adapted to the frequency changes of the rotor in the actual condition. The TMD is adaptable to vibration of various frequency components of rotary machinery and has the advantages of being apparent in damping effect, compact in structure, small in required space, high in reliability, large in rigidity adjusting range and the like.

Description

technical field [0001] The invention relates to a vibration damping device used in rotating machinery, which is mainly used to control the vibration of rotating machinery rotors such as fans, compressors, and steam turbines, and belongs to the technical field of vibration control, in particular to the adaptive continuous frequency shift tuning quality of rotating machinery rotors damper. technical background [0002] Rotating machinery is the most widely used mechanical equipment in the industrial sector, such as aero engines, compressors, steam turbines, gas turbines, etc., and plays an important role in aerospace, energy, petrochemical and other industrial fields. As the core component of rotating machinery, the rotor system vibrates unavoidably. Since the vibration of the rotor system is an important factor determining the performance reliability of rotating machinery products, how to reduce the vibration of the rotor system, improve the life of the rotor, and ensure the...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an adaptive continuous frequency-shift tuning mass damper for rotating machinery rotors, aiming at the characteristics of various frequency components and strong randomness of characteristic main frequency during the working process of rotating machinery rotors, through online real-time continuous adjustment Stiffness, so that the frequency of the TMD subsystem is always consistent with the frequency of the main rotor system, so as to meet the current requirements of continuous real-time vibration suppression for rotating machinery rotors with multiple frequency component vibration expectations

This cage-type tuned mass damper has outstanding advantages such as obvious vibration reduction effect, compact structure, small installation space, high reliability, and large stiffness adjustment range, and can overcome the problem that it is difficult to use springs when TMD requires high stiffness.

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