Intelligent damping device and working process based on sma variable stiffness spring

Abstract

The invention discloses an intelligent vibration damping device based on an SMA variable-rigidity spring and a working process. The device comprises a vibration monitoring part, a working chamber temperature control part and a vibration damper main body part. The vibration monitoring part is composed of an oscilloscope, a cable and a sensor probe, the working chamber temperature control part is composed of a temperature display, a temperature regulator, a wire, a temperature sensor, a miniature refrigerator and a heater, and the vibration damper main body part is composed of an aluminum spring, a center moving shaft, a rubber gasket, a high damping tension sleeve, an NiTi-SMA spring, a movable sliding block, a hinged short bar and a metal shell. According to the intelligent vibration damping device based on the SMA variable-rigidity spring and the working process, a rigidity change rule presented by the NiTi-SMA spring which has the temperature sensitive characteristic under different temperatures is utilized, and the functions of intelligent vibration damping and vibration avoiding of a novel vibration damper are achieved; the intelligent vibration damping device has the advantages that the device is intelligent and controllable, the effect is obvious, the structure is simple, and machining is convenient; and the device is suitable for vibration damping systems of various large, medium and small scales industries and equipment for civil use.

Description

technical field [0001] The invention relates to the field of shock absorbers, in particular to an intelligent shock absorber and a working process based on SMA variable stiffness springs. Background technique [0002] Vibration is one of the most common phenomena in nature. It is caused by factors such as external disturbance and mechanical vibration. It permeates all aspects of human production and life, bringing many benefits to human beings, but also causing many harms. For example, continuous productive vibration will affect the human nervous system, cardiovascular system and bone tissue, and even cause permanent damage; some external disturbances will cause resonance of instruments, especially some precision instruments, which seriously affect the performance of instruments. use. In response to these situations, the general method is to add a shock absorber to the equipment structure. When vibration occurs, the vibration damping element can be used to achieve the effec...

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Problems solved by technology

Patent 2011102636770 utilizes the energy dissipation and vibration reduction effect produced by the superelasticity of SMA to invent a sliding-type performance-adjustable SMA damper, which solves the problem that the stiffness and energy dissipation capacity of the existing SMA damper cannot be adjusted. Mainly used for reset after structural deformation and energy dissipation and vibration reduction

However, this design only adjusts the system performance by adjusting the length of the SMA wire, and does not consider the excellent temperature-sensitive characteristics of SMA, nor does it propose a temperature-vibration feedback adjustment mechanism, so there are still many areas for improvement in this design

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