Rotating fluid machine

Abstract

In a rotating fluid machine, a high-pressure working medium introducing hole, for introducing high-temperature high-pressure steam to a slide surface, is opened to a fixed side valve plate. Therefore, when a single first high-pressure working medium passage which opens from the fixed side valve plate to the slide surface and a plurality of second high-pressure working medium passages which open from a movable side valve plate to the slide surface, sequentially communicate with each other with rotation of a rotor, the high-temperature high-pressure steam from the first high-pressure working medium passage and the high-temperature high-pressure steam from the high-pressure working medium introducing hole are uniformly introduced to the entirety of the slide surface, and a change in the surface pressure of the slide surface is suppressed to stabilize the behavior of the fixed side valve plate, thus preventing leakage of the high-temperature high-pressure steam and the occurrence of abnormal wear.

1 . A rotating fluid machine comprising: 
 a casing;    a rotor rotatably supported by the casing;    a working section provided in the rotor; and    a rotary valve provided between the casing and the rotor for controlling the supply and discharge of a working medium to and from the working section,    the rotary valve having a fixed side valve plate supported at the casing side and a movable side valve plate supported at the rotor side which are in contact with each other on a slide surface,    a single first high-pressure working medium passage which opens from the fixed side valve plate to the slide surface and a plurality of second high-pressure working medium passages which open from the movable side valve plate to the slide surface, sequentially communicating with each other with rotation of the rotor, and    a high-pressure working medium introducing hole for introducing a high-pressure working medium to the slide surface being opened to the fixed side valve plate.    
   
   
       2 . The rotating fluid machine according to  claim 1 , wherein the first high-pressure working medium passage and the high-pressure working medium introducing hole are disposed at equal angles in a circumferential direction.  
   
   
       3 . The rotating fluid machine according to  claim 1 , wherein the high-pressure working medium which is introduced from the high-pressure working medium introducing hole to the slide surface is a high-pressure working medium which is supplied from the first high-pressure working medium passage to the second high-pressure working medium passage in an expansion stroke, or a high-pressure working medium which is discharged from the second high-pressure working medium passage in a compression stroke to the first high-pressure working medium passage.  
   
   
       4 . The rotating fluid machine according to  claim 2 , wherein the high-pressure working medium which is introduced from the high-pressure working medium introducing hole to the slide surface is a high-pressure working medium which is supplied from the first high-pressure working medium passage to the second high-pressure working medium passage in an expansion stroke, or a high-pressure working medium which is discharged from the second high-pressure working medium passage in a compression stroke to the first high-pressure working medium passage.  
   
   
       5 . The rotating fluid machine according to  claim 2 , wherein the first high-pressure working medium passage is disposed in a first position on said fixed side valve plate and two high-pressure working medium introducing holes are disposed at equal angles in a circumferential direction for stabilizing the fixed side valve plate.  
   
   
       6 . The rotating fluid machine according to  claim 5 , wherein said fixed side valve plate is supported in a floating state and further including a pressure chamber for biasing said fixed side valve plate into contact with said movable side valve plate.  
   
   
       7 . The rotating fluid machine according to  claim 6 , and further including a high-pressure supply operatively connected to said pressure chamber and being spaced a predetermined distance relative to said fixed side valve plate for supplying pressure to said first high-pressure working medium passage.  
   
   
       8 . The rotating fluid machine according to  claim 7 , and further including a packing retainer operatively positioned relative to said high-pressure supply and the fixed side valve plate for sealing the space therebetween.  
   
   
       9 . The rotating fluid machine according to  claim 8 , wherein said packing retainer includes a conical surface and further including a V-packing disposed adjacent to said conical surface for providing two sealing lips for sealing said space between the high-pressure supply and the fixed side valve plate.  
   
   
       10 . A valve for use in a rotating fluid machine comprising: 
 a rotary valve adapted to be provided between a casing and a rotor for controlling the supply and discharge of a working medium to and from a working section of the rotor,    a fixed side valve plate adapted to be supported at a casing side;    a movable side valve plate adapted to be supported at a rotor side, said fixed side valve plate and said movable side valve plate being in contact with each other with a slide surface formed therebetween;    a single first high-pressure working medium passage opening from the fixed side valve plate to the slide surface;    a plurality of second high-pressure working medium passages opening from the movable side valve plate to the slide surface, said single first high-pressure working medium passage and said plurality of second high-pressure working medium passages being sequentially brought into communicating with each other with rotation of the rotor; and    a high-pressure working medium introducing hole for introducing a high-pressure working medium to the slide surface is in communication with the fixed side valve plate for stabilizing the fixed side valve plate.    
   
   
       11 . The valve for use in a rotating fluid machine according to  claim 10 , wherein the first high-pressure working medium passage and the high-pressure working medium introducing hole are disposed at equal angles in a circumferential direction.  
   
   
       12 . The valve for use in a rotating fluid machine according to  claim 10 , wherein the high-pressure working medium which is introduced from the high-pressure working medium introducing hole to the slide surface is a high-pressure working medium which is supplied from the first high-pressure working medium passage to the second high-pressure working medium passage in an expansion stroke, or a high-pressure working medium which is discharged from the second high-pressure working medium passage in a compression stroke to the first high-pressure working medium passage.  
   
   
       13 . The valve for use in a rotating fluid machine according to  claim 11 , wherein the high-pressure working medium which is introduced from the high-pressure working medium introducing hole to the slide surface is a high-pressure working medium which is supplied from the first high-pressure working medium passage to the second high-pressure working medium passage in an expansion stroke, or a high-pressure working medium which is discharged from the second high-pressure working medium passage in a compression stroke to the first high-pressure working medium passage.  
   
   
       14 . The valve for use in a rotating fluid machine according to  claim 11 , wherein the first high-pressure working medium passage is disposed in a first position on said fixed side valve plate and two high-pressure working medium introducing holes are disposed at equal angles in a circumferential direction for stabilizing the fixed side valve plate.  
   
   
       15 . The valve for use in a rotating fluid machine according to  claim 14 , wherein said fixed side valve plate is supported in a floating state and further including a pressure chamber for biasing said fixed side valve plate into contact with said movable side valve plate.  
   
   
       16 . The valve for use in a rotating fluid machine according to  claim 15 , and further including a high-pressure supply operatively connected to said pressure chamber and being spaced a predetermined distance relative to said fixed side valve plate for supplying pressure to said first high-pressure working medium passage.  
   
   
       17 . The valve for use in a rotating fluid machine according to  claim 16 , and further including a packing retainer operatively positioned relative to said high-pressure supply and the fixed side valve plate for sealing the space therebetween.  
   
   
       18 . The valve for use in a rotating fluid machine according to  claim 17 , wherein said packing retainer includes a conical surface and further including a V-packing disposed adjacent to said conical surface for providing two sealing lips for sealing said space between the high-pressure supply and the fixed side valve plate.