管路における空気の温度変化が空気圧シリンダ応答へ与える影響

抄録

Pneumatic cylinder systems design has been conducted treating pipes only as a restriction using the equivalent effective area method, neglecting the air temperature change in the pipes. According to this method, the cylinder velocity is the same when restrictions along the pneumatic line are the same. However, this paper shows different results using the same restrictions when only the position of the speed control valve along the outlet pipe is changed. These results are explained by the air temperature change in the outlet pipe and impossible to predict with the equivalent effective area method. To verify the air temperature change, air temperature is measured using thermocouples and experiments are simulated using a pipe model with consideration given to heat transfer. The influence of the air temperature change in the pipe on cylinder response is clarified. Simulation results using a previously proposed pipe model show that cylinder response can be predicted accurately.