Compressor

Abstract

A compressor includes a rotary shaft, a front rotor including a front rotor surface, an intermediate wall portion including a first wall surface opposed to the front rotor surface in an axial direction, and a vane that is inserted into a vane groove formed in the intermediate wall portion and is moved in the axial direction with rotation of the front rotor. The vane includes a first vane end that is an end in the axial direction and contacts the front rotor surface. The first vane end is curved so as to be convex toward the front rotor surface and extends in the direction perpendicular to the axial direction. The front rotor surface includes a front curving surface curved in the axial direction so as to be displaced in the axial direction in accordance with its angular position.

1 . The compressor according to  claim 10 , wherein
 the curving surface includes
 a concave surface curved in the axial direction so as to be concave toward the wall surface, and 
 a convex surface curved in the axial direction so as to be convex toward the wall surface, 
   the concave surface includes a concave surface radially inner end and a concave surface radially outer end as opposite ends in the radial direction,   in the concave surface, a radius of curvature of the concave surface radially inner end in the axial direction is smaller than a radius of curvature of the concave surface radially outer end,   the convex surface includes a convex surface radially inner end and a convex surface radially outer end as opposite ends in the radial direction, and   in the convex surface, a radius of curvature of the convex surface radially inner end in the axial direction is smaller than a radius of curvature of the convex surface radially outer end.   
     
     
         2 . The compressor according to  claim 1 , wherein
 the vane includes a tabular shape having a thickness in a direction perpendicular to both the axial direction and the longitudinal direction of the vane end, and   the thickness of the vane is set such that the vane end contacts the curving surface from a radially inner end to a radially outer end irrespective of the angular position of the curving surface.   
     
     
         3 . The compressor according to  claim 1 , wherein
 the rotor surface includes a first flat surface and a second flat surface that are perpendicular to the axial direction,   the first flat surface is separated from the wall surface in the axial direction,   the second flat surface is provided at a position separated from the first flat surface in a circumferential direction and contacts the wall surface,   the curving surface connects the first flat surface to the second flat surface and is curved in the axial direction so as to be gradually closer to the wall surface from the first flat surface toward the second flat surface,   the concave surface is arranged closer to the first flat surface than the second flat surface,   the convex surface is arranged closer to the second flat surface than the first flat surface, and   the concave surface is connected to the convex surface.   
     
     
         4 . The compressor according to  claim 1 , comprising:
 as the rotor, a first rotor and a second rotor that are arranged to be opposed to each other in the axial direction,   as the cylindrical portion, a first cylindrical portion and a second cylindrical portion, wherein
 the first cylindrical portion includes a first inner circumferential surface opposed to the outer circumferential surface of the first rotor in the radial direction and houses the first rotor, and 
 the second cylindrical portion includes a second inner circumferential surface opposed to the outer circumferential surface of the second rotor in the radial direction and houses the second rotor, and 
   as the compression chamber, a first compression chamber and a second compression chamber, wherein   the first rotor includes a first rotor surface as the rotor surface,   the second rotor includes, as the rotor surface, a second rotor surface opposed to the first rotor surface in the axial direction,   the vane is arranged between the rotor surfaces and includes, as the vane end, a first vane end contacting the first rotor surface and a second vane end contacting the second rotor surface,   the wall portion is arranged between the first rotor and the second rotor and includes, as the wall surface, a first wall surface opposed to the first rotor surface in the axial direction and a second wall surface opposed to the second rotor surface in the axial direction,   the first compression chamber is defined by the first rotor surface, the first wall surface, and the first inner circumferential surface, and is a chamber in which volume change is caused by the vane with rotation of the first rotor such that suction and compression of the fluid are performed,   the second compression chamber is defined by the second rotor surface, the second wall surface, and the second inner circumferential surface, and is a chamber in which volume change is caused by the vane with rotation of the second rotor such that suction and compression of the fluid are performed,   the first rotor surface includes a first curving surface including a first concave surface and a first convex surface that are connected to each other,   the second rotor surface includes, as the curving surface, a second curving surface including a second concave surface and a second convex surface that are connected to each other,   the first concave surface and the second convex surface are opposed to each other in the axial direction,   the first convex surface and the second concave surface are opposed to each other in the axial direction,   the first curving surface and the second curving surface include inflection points at an identical angle position and are inclined such that the radially inner ends of the curving surfaces are more separated from each other than the radially outer ends at least at the inflection point, and   when the vane is arranged at an angular position corresponding to the inflection point, the first vane end contacts a radially inner end of the first curving surface, and the second vane end contacts a radially inner end of the second curving surface.   
     
     
         5 . The compressor according to  claim 1 , wherein
 the concave surface is formed such that the radius of curvature in the axial direction gradually becomes smaller from the concave surface radially outer end toward the concave surface radially inner end, and   the convex surface is formed such that the radius of curvature in the axial direction gradually becomes smaller from the convex surface radially outer end toward the convex surface radially inner end.   
     
     
         6 . The compressor according to  claim 1 , wherein
 a radially inside end face of the vane contacts an outer circumferential surface of the rotor cylindrical portion into which the rotary shaft is inserted and that is rotated with rotation of the rotary shaft, and   a curvature of the radially inside end face of the vane is smaller than a curvature of the outer circumferential surface of the rotor cylindrical portion.   
     
     
         7 . The compressor according to  claim 1 , wherein
 a radially inside end face of the vane contacts an outer circumferential surface of the rotary shaft, and   a curvature of the radially inside end face of the vane is smaller than a curvature of the outer circumferential surface of the rotary shaft.   
     
     
         8 . The compressor according to  claim 1 , wherein
 a radially outside end face of the vane contacts the inner circumferential surface of the cylindrical portion, and   a curvature of the radially outside end face of the vane is larger than a curvature of the inner circumferential surface of the cylindrical portion.   
     
     
         9 . The compressor according to  claim 8 , wherein the radially outside end face of the vane includes
 a first outer end face that is arranged on a leading side in the rotation direction of the rotary shaft and has a curvature larger than the curvature of the inner circumferential surface of the cylindrical portion, and   a second outer end face that is arranged on a trailing side in the rotation direction of the rotary shaft and has a curvature larger than the curvature of the first outer end face.   
     
     
         10 . A compressor comprising:
 a rotary shaft;   a rotor including a rotor surface formed into a ring-shape and rotated with rotation of the rotary shaft;   a cylindrical portion including an inner circumferential surface opposed to an outer circumferential surface of the rotor in a radial direction of the rotary shaft, and housing the rotor;   a wall portion including a wall surface opposed to the rotor surface in an axial direction of the rotary shaft;   a vane that is inserted into a vane groove formed in the wall portion, and is moved in the axial direction with rotation of the rotor; and   a compression chamber defined by the rotor surface, the wall surface, and the inner circumferential surface of the cylindrical portion, and volume change of the compression chamber being caused by the vane with rotation of the rotor such that suction and compression of fluid are performed, wherein   the vane includes a vane end that is an end in the axial direction and contacts the rotor surface,   the vane end is curved so as to be convex toward the rotor surface and extends in a direction perpendicular to the axial direction,   the rotor surface includes a curving surface curved in the axial direction,   the curving surface is curved so as to be displaced in the axial direction in accordance with its angular position, and   the curving surface includes a part in which a radius of curvature with respect to the axial direction differs in accordance with a position in the radial direction such that at least a part of a contact line between the curving surface and the vane end is curved in a circumferential direction of the rotor.