シリンダ型気液相変化アクチュエータにおける作動流体の検討

抄録

This paper describes fabrication of a cylinder type gas-liquid phase change actuator. Pneumatic actuator is used for endoscopic surgery support robot. However pneumatic actuator have some faults. Its peripheral equipment is large and makes oscillation and electromagnetic noise. These adversely affect medical equipments. We think that new actuator which does not have those faults is necessary. We suggest a gas-liquid phase change actuator. It is an actuator which big power is got from in the small size. And it can work only with DC power supply such as dry cells. Its device is small and has a small influence to give medical equipments. In this study, we aim to improve the cooling characteristics of the actuator by comparing and examining several working fluids in the actuator. We created a cylinder-type actuator that can move a piston using a gas-liquid phase change. Actuators and a DC power supply were used to apply voltages to six different working fluids and check their displacement response. As a result, it was determined that the best fluid at present is liquid II.