ROTATING MACHINE SEAL DEVICE

摘要

Rotating machine seal device is improved so that seal plate is fitted to rotating portion firmly, thereby self-induced vibration of the seal plate is reduced and occurrence of abrasion or thinning of the seal plate due to the self-induced vibration and sealing deterioration accompanying therewith are prevented. In rotating machine seal device having seal plate (2) inserted into groove (1a) provided in disc: portion (1) driven rotationally, said seal device being for sealing fluid between fluid passage (12) on outer circumferential side of said groove (1a) and fluid passage (14) on inner circumferential side of said groove (1a), said seal plate (2) is divided into plural pieces along circumferential direction thereof to be inserted into said groove (1a) of the disc portion (1) and spring plate (3) is disposed on inner eircumferential side of said seal plate (2) so that said seal plate (2) is pressed against seal surface (1b) of said groove (la) by spring force of said spring plate (3). Also, said seal plate is divided into plural pieces and one piece (2d') has projection portion (5) and another piece (2d) has groove portion (6) so that they are mated with each other to be inserted into said groove (1a).