Measurement of the Relative Behavior of a Rotary Engine Apex Seal to the Side of a Slot using Magnetic Induction

抄録

Behavior measurements have been made of an aluminum-impregnated carbon apex seal of 6mm in thickness and a chilled cast iron apex seal of 3mm in thickness. A new magnetic induction system consisting of transmitting, resonance and receiving printed-board coils was devised. An inductive-type sensor was connected with the resonance coil, being intermediate between the others. Quantitative measurements with high frequency response became possible with this system. It was found that at speeds higher than about 3000rpm and loads higher than 2/4, the cast iron apex seal had a tendency to vibrate after the shift from trailing to the leading side of the slot after the minor axis of the rotor housing on the ignition side.