Coil external type semiactive vibration absorber in enclosed structure

Abstract

The invention aims to provide a coil external type semiactive vibration absorber in an enclosed structure, which comprises an upper cover, a base, a shell, an armature, a shaft, a coil winding, a spring and an internal magnetic circuit, wherein the internal magnetic circuit comprises an upper internal magnetic circuit and a lower internal magnetic circuit; the base is fixedly connected with the shell; the coil winding, the upper internal magnetic circuit and the lower internal magnetic circuit are connected to the inner wall of the shell; the coil winding is arranged in a duct formed by the upper internal magnetic circuit and the lower internal magnetic circuit; the armature is arranged on the upper and lower internal magnetic circuits; the outer side of the armature is connected with the upper and lower internal magnetic circuits; the shaft passes through the armature and is arranged on the base; the spring is arranged in the space between the armature and the shaft; and the upper cover, the base and the shell form an enclosed structure. The base is adopted for supporting, so that the center of gravity is lowered, the supporting area is increased, the installation stability is improved, and the anti-swing ability is within 45 degrees by adopting the supporting way. The coil winding is embedded on the inner wall of a cylindrical shell of a stator, the coil winding is relatively fixed with a wire loop, and the reliability of the vibration absorber is improved.

Description

technical field [0001] The invention relates to a shock absorber in the technical field of shock and noise reduction. Background technique [0002] In the field of vibration control engineering, dynamic vibration absorbers are commonly used to suppress the vibration of a certain frequency of the system. The working principle of the dynamic vibration absorber is to attach a structure with mass and stiffness to a specific part of the system. When the total energy input by the excitation source to the system including the additional structure remains constant, the original system and the vibration absorber will be at each frequency. The sum of the absorbed energy also remains the same. When the motion energy of the vibration absorber reaches the maximum value (resonance) at a certain frequency, the motion energy of the original system at this frequency reaches the minimum value correspondingly, which plays the role of "vibration absorption". The working principle of the vibra...

AI Technical Summary

Problems solved by technology

[0007] In the structure of the whole machine, axis 1 is used as both a supporting structure and a guiding role, so it is only suitable for a position with good verticality, and cannot resist swaying, nor can it be used horizontally;

[0008] The way shaft 1 protrudes from both ends is not conducive to sealing, and it is greatly affected by salt spray in the marine environment, and the internal components are easy to corrode;

[0009] The external design of the spring 3 makes the balance position and preload state of the spring change every time it is installed, and the actual state of the toothed magnetic circuit between the internal stator and the mover is different from the calibration state, resulting in the control program not being able to Execute the corresponding frequency

Experiments show that the natural frequency-current characteristics of the electric semi-active vibration absorber with the traditional structure are greatly affected by the installation pretightening force of the spring pressure plates 2 at both ends, and the working characteristics have strong nonlinearity, which has caused serious problems to the working process of the control system. bad influence

Images