Electromagnetic type two freedom degree semi-active vibration absorber

Abstract

The invention aims at providing an electromagnetic type two-degree-of-freedom semi-active vibration absorber which comprises a stator, rotors and magnet exciting coils, wherein the rotors comprise a first rotor and a second rotor; the stator is installed outside the first rotor, and the magnet exciting coils are respectively arranged inside and outside the stator; the second rotor is installed outside the stator; and end caps are installed on both ends of the first rotor, the stator and the second rotor, and the first rotor and the second rotor axially move in relative to the end caps. The number of vibration absorbers used for controlling a plurality of exciting force frequencies is greatly reduced, installation space and cost are saved, a control link is simplified, and the vibration absorber has broad application prospect.

Description

technical field [0001] The invention relates to a vibration absorber, in particular to a vibration absorber capable of reducing mechanical vibrations at two frequencies, fundamental frequency and multiplied frequency, of power machinery such as a diesel engine. Background technique [0002] Vibration is a common phenomenon in production and life. Vibration problems of ship power plant and other mechanical equipment have attracted more and more attention. Vibration not only easily causes structural fatigue damage, affects the life of equipment, but also reduces the measurement accuracy of instruments and meters. At the same time, vibration inevitably generates noise, which affects the normal work of operators and even endangers health. In order to suppress harmful vibrations, people have carried out a lot of research for a long time. The principle of the actuator of the electromagnetic dynamic vibration absorber disclosed in the patent document of Chinese Patent Publication...

AI Technical Summary

Problems solved by technology

However, this study, like most other related studies, can only track a single frequency, and the vibration of most power machinery is usually in a multiplied frequency relationship, and the vibration of the second-order natural frequency is also relatively large, which needs to be controlled simultaneously with the first-order natural frequency. Under such circumstances, the previous electromagnetic actuators cannot meet the practical application of engineering.

Images