Combined laminated frictional damping vibration absorber under magnetic constraint

Abstract

The invention discloses a combined laminated frictional damping vibration absorber under magnetic constraint. The combined laminated frictional damping vibration absorber comprises a friction laminate, a base plate, permanent magnets, a fixing groove, an arc-shaped base plate, a steel wire and a mass block. The friction laminate is internally provided with a cavity. A plate body of the base plateis embedded into the cavity. The multiple permanent magnets are fixedly arranged on the surface of the friction laminate. The arc-shaped base plate is arranged at the head end of the base plate. End points of the two ends of the arc-shaped base plate are connected through the steel wire. The mass block is fixed to the middle of the steel wire. A fixing groove which is sunken inwards is formed in the tail end of the friction laminate. By means of the combined laminated frictional damping vibration absorber under magnetic constraint, the great vibration absorption and the vibration reduction effects can be achieved under special conditions; a traditional power vibration absorber is replaced with a spring mass vibrator of the cubic rigidity and a multilayer flexible cantilever structure, andthe wide matching frequency is achieved; the combined laminated frictional damping vibration absorber can well adapt to random vibration frequency; and vibration energy transmitted from affected equipment to a combined structure can be remarkably dissipated.

Description

technical field [0001] The present disclosure relates generally to vibration absorbers, and more particularly to a combined laminate friction damping vibration absorber under magnetic confinement. Background technique [0002] Various types of equipment installed on motion platforms or facilities are always in a vibration environment. In most cases, vibration is harmful, and it will cause dynamic deformation and alternating stress of the mechanical mechanism. These deformations and stresses will make the equipment structure Fatigue and damage to internal components shorten the service life of parts or components, so active or passive vibration control of equipment and its internal components is a necessity. [0003] According to different vibration reduction measures for vibration sources and affected equipment / components, vibration control can be divided into three categories: suppression of vibration sources, vibration isolation, and vibration elimination or vibration abso...

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Problems solved by technology

[0004] In a random vibration environment, mechanical equipment is always excited by wide-band frequency vibration, and it becomes difficult to design the natural frequency of mechanical equipment away from the frequency of the vibration source

In the current passive vibration reduction design practice of mechanical equipment, measures such as adjusting the structural stiffness, pasting viscoelastic damping layers on the surface, and using vibration absorbers are mainly adopted. The vibration effect is not ideal

[0005] Although the traditional damping and vibration reduction technology is widely used, there are still many shortcomings. For example, the performance of the viscoelastic damper is easily affected by external environmental factors such as corrosion and temperature, and the viscoelastic material will also be affected by aging, creep, embrittlement, etc. resulting in a decrease in damping performance

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