| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sealing device for a rotary part of an engine, having high sealing performance and easy to manufacture a cylindrical sleeve. <P>SOLUTION: In the sealing device for the rotary part of the engine, the cylindrical sleeve 51 is fitted in the rotary part 50 of the engine and an oil seal 53 fixed to the engine abuts on the outer peripheral surface 52 of the cylindrical sleeve 51, As the cylindrical sleeve 51, a cylindrical sleeve formed by performing quenching to the outer peripheral surface 52 of a cylindrical steel material to improve the surface hardness and, thereafter, not performing tempering or performing low-temperature tempering thereto is used. As a quenching processing, laser quenching, high-frequency quenching and carburizing quenching are used. <P>COPYRIGHT: (C)2011,JPO&INPIT |
