The phenomenon of joint heating often occurs when the current flows through the power joint. The heating of the connector will lead to safety accidents of the power grid or customers. Memory alloy smart gasket is an intelligent gasket integrating "sensing" and "execution". The product can automatically increase the elasticity of the gasket, reduce the contact resistance of the joint, and effectively relieve the heat of the joint according to the increase of the joint temperature.
The shape memory alloy connection fastening kit is a fastening connector equipped with shape memory alloy fastening elements, which is composed of bolts, nuts and fastening rings. Due to the unique properties of the materials, they can be widely used in electrical, high-speed railway, automobile, maritime, chemical, aerospace, engineering machinery and other fields.
Aviation hydraulic pipe joint is one of the important components that affect aircraft safety. Highly reliable and lightweight pipe joint is an important guarantee for aircraft safety and economy. Shape memory alloy (SMA) pipe joint is a high-performance aviation pipe joint made of shape memory alloy (nitife, NiTiNb), which can be used in 13.8mpa ~ 55.2mpa pressure systems. When the memory alloy pipe joint is in the martensite state (liquid nitrogen / alcohol / petroleum ether), use the preformed pipe joint (the inner diameter is slightly smaller than the outer diameter of the pipe) with the corresponding diameter expanding mandrel to make the inner diameter slightly larger than the outer diameter of the pipe. During installation, take out the pipe joint from the liquid nitrogen and put it in the installation position. When the temperature of the pipe joint gradually rises, it will shrink and generate sufficient restoring force to clamp the pipe. At the same time, the inner ridge of the pipe joint is embedded into the pipe, A gold to metal seal is formed so that the connection has high connection strength and excellent sealing performance.
The memory alloy drive wire is a wire material with no less than 2%two-way memory effect or no less than 6%one-way memory effect,which is made by using the memory recovery characteristics of TiNi shape memory alloy,and can be electrically heated to achieve driving work.It is also called electrically contracted titanium wire or muscle wire.By energizing the shape memory alloy wire,the alloy wire will undergo phase transformation and its length will be shortened,so as to achieve the driving effect.By controlling the magnitude and time of the current loaded on the alloy wire,the contraction speed can be controlled. The energy density of memory alloy driving wire is 1000 times higher than that of human muscle and 4000 times higher than that of electromagnetic motor.Therefore,the shape memory alloy driving wire can be made into a device with small volume and weight but large driving force.Compared with electromagnetic motor,SMA motor made of shape memory alloy driving wire has the characteristics of small volume,low power consumption,fast response,quiet and long service life.
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