Rotating machinery

Abstract

There is provided a rotating machinery including: a rotating body R which is rotatable around an axis O and has a first facing surface P1 that widens in a plane intersecting the axis O; a stationary body S which faces the first facing surface P1 from the axial direction O, and has a second facing surface P2 forming a flow path F1 through which a fluid flows from a radially inner side toward the radially outer side between the first facing surface P1 and the second facing surface P2; and a rotation side projection portion 80 which projects from the first facing surface P1 toward the second facing surface P2, has an annular shape around the axis O, and faces the second facing surface P2 via a clearance C.

1 - 21  (canceled) 
     
     
         22 . A rotating machinery comprising:
 a rotating body which is rotatable around an axis and has a first facing surface that widens in a plane intersecting the axis;   a stationary body has a second facing surface which faces the first facing surface in an axial direction and forms a flow path through which a fluid flows from a radially inner side toward a radially outer side between the first facing surface and the second facing surface; and   at least one rotation side projection portion which projects from the first facing surface toward the second facing surface, has an annular shape around the axis, and faces the second facing surface via a clearance,   wherein a first outer region which is a region on the radially outer side with respect to the at least one rotation side projection portion on the first facing surface widens to a position further away from the second facing surface in the axial direction than a first inner region which is a region on the radially inner side with respect to the at least one rotation side projection portion on the first facing surface.   
     
     
         23 . The rotating machinery according to  claim 22 ,
 wherein positions of a first inner region which is a region on the radially inner side with respect to the at least one rotation side projection portion and a first outer region which is a region on the radially outer side with respect to the at least one rotation side projection portion on the first facing surface, are the same in the axial direction.   
     
     
         24 . The rotating machinery according to  claim 22 ,
 wherein the at least one rotation side projection portion has a radial dimension that decreases going from the first facing surface side toward the second facing surface side.   
     
     
         25 . The rotating machinery according to  claim 22 ,
 wherein the second facing surface is formed in a planar shape intersecting the axis.   
     
     
         26 . The rotating machinery according to  claim 22 , wherein
 the rotating body is a rotating shaft which has a plurality of impellers, and   the stationary body is a casing that forms a fluid flow path by covering the periphery of the rotating shaft.