A sma wire split sleeve large stroke active adjustment damper

Abstract

The invention provides a large-travel active adjusting damper of a SMA wire split sleeve. The large-travel active adjusting damper of the SMA wire split sleeve comprises a split sleeve, a super-elasticity SMA wire, a piston, two external bolts, two damping rings and a mounting frame; the inner wall of the split sleeve is a periodic diameter change cylindrical surface, and is complementary with the outer wall of the piston in shape; two ends of the piston are connected with the external bolts for connecting the damper with other parts; two sides of the piston are respectively provided with one damping ring; and the super-elasticity SMA wire is uniformly wound on the insulation outer wall surface of the split sleeve. The large-travel active adjusting damper of the SMA wire split sleeve fuses the material damping of a super-elasticity memory alloy, the dry friction damping and the damping ring damping to improve the vibration reducing performance, uses the structure of the periodic friction surface to enable once travel of the damper to include multiple loading and unloading processes of the super-elasticity SMA wire to effectively increase the vibration amplitude borne by the damper, can realize self-adaption rigidity and damping adjusting functions through control of the SMA wire, prevents the failure problem of a sealing piece, and is long in service life, wide in application range and high in reliability.

Description

technical field [0001] The invention relates to the technical field of dampers, in particular to an SMA wire split sleeve large-stroke active adjustment damper, which simultaneously uses materials such as dry friction between the split sleeve and the contact surface of the piston and superelastic shape memory alloy wire The high damping characteristics absorb the external energy, thereby playing the role of vibration reduction. Background technique [0002] Shock absorption is a very common and important topic in daily life, engineering field, and even aerospace field. Natural disasters such as earthquakes and typhoons pose a serious threat to the safety of human buildings. It is of great significance to study how to effectively reduce the response of buildings under the load generated by natural disasters and improve the ability to resist earthquakes and winds; Excessive vibration loads pose a threat to the safety of drivers and operators, and will cause immeasurable losse...

AI Technical Summary

Problems solved by technology

Natural disasters such as earthquakes and typhoons pose a serious threat to the safety of human buildings. It is of great significance to study how to effectively reduce the response of buildings under the load generated by natural disasters and improve the ability to resist earthquakes and winds; Excessive vibration loads pose a threat to the safety of drivers and operators, and will cause immeasurable losses to the reputation and economic benefits of automobiles and equipment manufacturers; while the aircraft lands and the moment the artillery is fired, due to its own weight, the ground or the base will produce Strong impact force, although they are equipped with various shock absorbers, they are prone to problems such as spring plastic deformation, seal aging, oil leakage, etc., which will reduce safety and reliability

[0003] At present, relatively mature shock absorption technologies include hydraulic shock absorption, high damping solid material shock absorption, friction shock absorption, etc., but any single-principle damper has its own defects, such as sealing problems of hydraulic dampers, high damping solid material shock absorption, etc. The aging problem of the friction damper, the loss problem of the friction damper, etc., the memory alloy is a relatively new type of intelligent material, which has the characteristics of shape memory effect, superelasticity and high damping, and its performance has obvious advantages compared with other materials. Shock-absorbing materials, the shock-absorbing effect is limited by factors such as the deformation of the memory alloy and the strength of the material

Images