Patent ID: 7540725
Filing Date: 2009-06-02
Classification: F04D,F16J

Abstract:
1. A seal mechanism for a fluid machine for preventing a fluid from leaking out of a high-pressure space into a low-pressure space in the fluid machine, said seal mechanism comprising: an annular seal member movable in a radial direction, said annular seal member having a first surface on a side of the low-pressure space in the fluid machine; a housing disposed between a body of the fluid machine and a rotatable member located inside the body of the fluid machine so as to receive said annular seal member, said housing having a second surface facing said first surface of said annular seal member; and at least one passage formed in at least one of said first surface and said second surface such that a negative pressure of the low-pressure space is introduced into said at least one passage to bring said annular seal member into close contact with said second surface of said housing.