Fluid Machine

Abstract

A fluid machine ( 29 A) including: a casing section ( 56 ) including a suction port ( 55 ); a housing section ( 54 ) including a discharge port ( 53 ); and scrolls ( 51, 52 ) driven by a working fluid suctioned from the suction port ( 55 ). In the fluid machine ( 29 A), a bypass section ( 80 ), which includes a bypass passage ( 81 ) guiding the working fluid to the discharge port ( 53 ) while allowing the working fluid to bypass the scrolls ( 51, 52 ) and a valve mechanism ( 83 ) opening and closing the bypass passage ( 81 ), is supported between the casing section ( 56 ) and the housing section ( 54 ). The valve mechanism ( 83 ) is a solenoid valve which displaces a valve body in a radial direction of a rotating shaft ( 28 ), and an accommodating portion of a coil ( 83 d ) is exposed to the outside of the casing section ( 56 ) and the housing section ( 54 ).

1 . A fluid machine comprising:
 a suction port into which a working fluid that becomes a heated vapor and has a high pressure flows;   a casing section including the suction port;   a driving section which is driven by expansion of the working fluid suctioned from the suction port;   a discharge port from which the working fluid that has passed through the driving section and has a low pressure flows; and   a housing section including the discharge port,   wherein a bypass section, in which a bypass passage that guides the working fluid suctioned from the suction port to the discharge port while allowing the working fluid to bypass the driving section is formed and a valve mechanism that opens and closes the bypass passage is included, is supported between the casing section and the housing section.   
     
     
         2 . The fluid machine according to  claim 1 ,
 wherein the valve mechanism is a solenoid valve which opens and closes the bypass passage by displacing a valve body in a radial direction of a rotating shaft of the driving section using magnetic force of a coil.   
     
     
         3 . The fluid machine according to  claim 2 ,
 wherein an accommodating portion of the coil of the bypass section is exposed to the outside of the casing section and the housing section.   
     
     
         4 . The fluid machine according to  claim 1 ,
 wherein one end of the bypass passage is sealed by a cylindrical seal, and the other end thereof is sealed by a flat seal.   
     
     
         5 . The fluid machine according to  claim 1 ,
 wherein the suction port and the discharge port extend in a radial direction of a rotating shaft of the driving section and are arranged in an axial direction of the rotating shaft, and   wherein the bypass section is disposed between the suction port and the discharge port so that the suction port and the discharge port are allowed to communicate with each other via the bypass passage.   
     
     
         6 . The fluid machine according to  claim 1 ,
 wherein one end of the bypass passage is connected to the suction port, the other end of the bypass passage is connected to a space that is on a discharge side of the driving section and communicates with the discharge port.   
     
     
         7 . The fluid machine according to  claim 1 ,
 wherein the fluid machine is a scroll type expander including the driving section constituted by a fixed scroll and an orbiting scroll, and is incorporated in a Rankine cycle device which recovers waste heat of an engine for a vehicle for use.   
     
     
         8 . The fluid machine according to  claim 1 ,
 wherein the fluid machine is a scroll type expander including an anti-rotation mechanism,   wherein the anti-rotation mechanism is a ball coupling type anti-rotation mechanism which uses balls as rolling elements.