Rotary type fluid machine

Abstract

A rotary fluid machine is provided that includes a rotary valve ( 61 ) for controlling the intake and discharge of a working medium to and from an operating part ( 49, 57 ) formed from an axial piston cylinder group, a steam supply pipe ( 77 ) that is disposed on an axis (L) of a rotor ( 27 ) and supplies steam to the rotary valve ( 61 ), the steam supply pipe ( 77 ) being provided separately from a rotary valve main body ( 62 ), and gland packing sealing means ( 97 ) disposed between the steam supply pipe ( 77 ) and the rotary valve main body ( 62 ). Since the sealing means ( 97 ), which is flexible, has the function of preventing movement in the direction of the axis (L) of the steam supply pipe ( 77 ) from being transmitted to the rotary valve ( 61 ), it is possible to ensure the intimacy of contact of sliding surfaces ( 68 ) of the rotary valve ( 61 ) while minimizing the leakage of steam past the outer periphery of the steam supply pipe ( 77 ) by means of the sealing means ( 97 ), thereby enabling the steam to be supplied and discharged reliably.

1 . A rotary fluid machine comprising: 
 a casing ( 11 );    a rotor ( 27 ) rotatably supported in the casing ( 11 );    an operating part ( 49 ,  57 ) provided in the rotor ( 27 ); and    a rotary valve ( 61 ) that is provided between the casing ( 11 ) and the rotor ( 27 ) and controls the intake and discharge of a working medium to and from the operating part ( 49 ,  57 ) via sliding surfaces ( 68 ) that are perpendicular to the axis (L) of the rotor ( 27 );    wherein a working medium supply pipe ( 77 ) is provided separately from the rotary valve ( 61 ), the working medium supply pipe being positioned on the axis (L) of the rotor ( 27 ) and supplying the working medium to the rotary valve ( 61 ), and sealing means ( 97 ) is disposed between the working medium supply pipe ( 77 ) and the rotary valve ( 61 ), the sealing means ( 97 ) having the function of preventing movement of the working medium supply pipe ( 77 ) in the axial (L) direction of the rotor ( 27 ) from being transmitted to the rotary valve ( 61 ).    
   
   
       2 . The rotary fluid machine according to  claim 1 , wherein the sealing means ( 97 ) is a gland packing.  
   
   
       3 . The rotary fluid machine according to  claim 2 , wherein the rotary fluid machine further comprises working medium recovery means ( 94 ,  18   e ) for recovering working medium that has leaked past the sealing means ( 97 ).  
   
   
       4 . The rotary fluid machine according to  claim 3 , wherein the working medium recovery means ( 94 ,  18   e ) returns the recovered working medium to a downstream side of the operating part ( 49 ,  57 ).