| 摘要 |
A shaft-sealing device is provided with: a rotating ring (51) fixed to the outer circumference of a shaft (30); a fixed ring (52) fixed on the circumference of a shaft hole (41c) of a housing (40) and in surface contact with the rotating ring (51); a lip seal (53), the outer circumference of which is fixed to the housing (40) and the inner circumference of which contacts the shaft (30); and a bimetal (54) for changing the lip seal (53) from a shape that contacts the shaft (30) to a shape that does not contact same as temperature increases. As a result, when a compressor (10) is stopped and the bimetal (54) has a low temperature, sealing is improved by bringing the lip seal (53) into contact with the shaft (30) and when the compressor (10) is operating and the bimetal has a high temperature, the lip seal (53) is protected by keeping the lip seal (53) from contacting the shaft (30). |
