Compressor

Abstract

A compressor includes a rotary shaft, a rotating body, a fixed body, a vane, and a compression chamber. The vane has a vane end that contacts the surface of fixed body. The fixed body surface includes two curved surfaces. The curved surface includes a convex surface and a concave surface. The convex surface has a convex surface inner end and a convex surface outer end. The curvature of the convex surface inner end is greater than the curvature of the convex surface outer end. The concave surface has a concave surface inner end and a concave surface outer end. The curvature of the concave surface inner end is greater than the curvature of the concave surface outer end.

What is claimed is: 
     
         1 . A compressor comprising:
 a rotary shaft;   a rotating body that is configured to rotate together with the rotary shaft and includes a rotating body surface, which intersects with an axial direction of the rotary shaft, and a vane groove and;   a fixed body that is configured not to rotate together with the rotary shaft and includes a fixed body surface, which faces the rotating body surface in the axial direction;   a vane that is inserted in the vane groove and configured to rotate together with the rotating body while moving in the axial direction; and   a compression chamber that is defined by the rotating body surface and the fixed body surface and in which suction and compression of fluid is performed when the vane rotates while moving in the axial direction, wherein   the vane has a vane end at an end in the axial direction, the vane end contacting the fixed body surface,   the vane end is curved to be convex toward the fixed body surface and extends in a direction orthogonal to the axial direction,   the fixed body surface includes
 a fixed body contact surface that contacts the rotating body surface, and 
 two curved surfaces respectively provided on opposite sides of the fixed body contact surface in a circumferential direction of the rotary shaft, each curved surface being curved such that a distance to the rotating body surface increases as a distance to the fixed body contact surface increases, and 
   each curved surface includes
 a convex surface continuous with the fixed body contact surface, the convex surface being curved to be convex toward the rotating body surface, and 
 a concave surface continuous with the convex surface, the concave surface being curved to be concave with respect to the rotating body surface, wherein 
   the convex surface includes a convex surface inner end and a convex surface outer end at opposite ends in a radial direction of the rotary shaft,   a curvature in the axial direction of the convex surface inner end is greater than a curvature in the axial direction of the convex surface outer end,   the concave surface includes a concave surface inner end and a concave surface outer end at opposite ends in the radial direction, and   a curvature in the axial direction of the concave surface inner end is greater than a curvature in the axial direction of the concave surface outer end.   
     
     
         2 . The compressor according to  claim 1 , wherein
 the vane is plate-shaped and has a thickness in a direction that is orthogonal to both of the axial direction and an extending direction of the vane end, and   the thickness of the vane is set such that the vane end contacts the curved surface in a range from an inner end to an outer end of the curved surface regardless of an angular position on the curved surface.   
     
     
         3 . The compressor according to  claim 1 , wherein
 the rotating body includes
 a rotating body tube in which the rotary shaft is inserted, the rotating body tube having a tube outer circumferential surface, and 
 a rotating body ring portion that extends radially outward from the tube outer circumferential surface, the rotating body ring portion including the rotating body surface and the vane groove, 
   the fixed body includes a fixed body insertion hole,   the rotating body tube is inserted in the fixed body insertion hole so that the rotating body is supported by the fixed body,   a boundary between the tube outer circumferential surface and the rotating body surface is curved, and   a chamfered portion that avoids interference with the boundary is provided at a corner portion of the fixed body surface and an inner wall surface of the fixed body insertion hole.   
     
     
         4 . The compressor according to  claim 1  further comprising a cylinder portion, wherein
 the cylinder portion includes a cylinder inner circumferential surface that cooperates with the rotating body surface and the fixed body surface to define the compression chamber, and accommodates the rotating body and the fixed body, 
 the vane includes
 a vane outer end face that is an outer end face in the radial direction of the rotary shaft and contacts the cylinder inner circumferential surface, and 
 a vane inner end face that is an inner end face in the radial direction of the rotary shaft and contacts a groove inner end face that is an inner end face of the vane groove in the radial direction, 
 
 the vane inner end face and the groove inner end face are curved in the same direction, and 
 a curvature of the vane inner end face is smaller than a curvature of the groove inner end face. 
 
     
     
         5 . The compressor according to  claim 4 , wherein
 the vane inner end face includes
 a first part inner end face that has a curvature smaller than that of the groove inner end face, and 
 a second part inner end face located on a leading side of the first part inner end face in a rotation direction of the rotating body, the second part inner end face having a curvature smaller than that of the first part inner end face. 
   
     
     
         6 . The compressor according to  claim 1  further comprising a cylinder portion, wherein
 the cylinder portion 
 includes a cylinder inner circumferential surface that cooperates with the rotating body surface and the fixed body surface to define the compression chamber, and 
 accommodates the rotating body and the fixed body, 
 the vane includes a vane outer end face that is an outer end face in the radial direction of the rotary shaft, 
 the vane outer end face contacts the cylinder inner circumferential surface, 
 the vane outer end face is curved in the same direction as the cylinder inner circumferential surface, and 
 a curvature of the vane outer end face is greater than a curvature of the cylinder inner circumferential surface. 
 
     
     
         7 . The compressor according to  claim 6 , wherein
 the vane outer end face includes   a first part outer end face having a curvature greater than that of the cylinder inner circumferential surface, and   a second part outer end face located on a leading side of the first part outer end face in a rotation direction of the rotating body, the second part outer end face having a curvature greater than that of the first part outer end face.   
     
     
         8 . The compressor according to  claim 1 , wherein
 the convex surface is configured such that a curvature of a displacement curve in the axial direction of the convex surface inner end in relation to changes in an angle is greater than a curvature of a displacement curve in the axial direction of the convex surface outer end in relation to changes in an angle, and   the concave surface is configured such that a curvature of a displacement curve in the axial direction of the concave surface inner end in relation to changes in an angle is smaller than a curvature of a displacement curve in the axial direction of the concave surface outer end in relation to changes in an angle.   
     
     
         9 . A compressor comprising:
 a rotary shaft;   a rotating body that is configured to rotate together with the rotary shaft and includes a rotating body surface, which intersects with an axial direction of the rotary shaft, and a vane groove;   a fixed body that is configured not to rotate together with the rotary shaft and includes a fixed body surface, which faces the rotating body surface in the axial direction, and a fixed body insertion hole;   a vane that is inserted in the vane groove and configured to rotate together with the rotating body while moving in the axial direction; and   a compression chamber that is defined by the rotating body surface and the fixed body surface and in which suction and compression of fluid is performed when the vane rotates while moving in the axial direction, wherein   the rotating body includes
 a rotating body tube in which the rotary shaft is inserted, the rotating body tube having a tube outer circumferential surface, and 
 a rotating body ring portion that is provided on the tube outer circumferential surface to protrude outward in a radial direction of the rotary shaft, the rotating body ring portion including the rotating body surface and the vane groove, 
   the rotating body tube is inserted in the fixed body insertion hole so that the rotating body is supported by the fixed body,   a boundary between the tube outer circumferential surface and the rotating body surface is curved, and   a chamfered portion that avoids interference with the boundary is provided at a corner portion of the fixed body surface and an inner wall surface of the fixed body insertion hole.