Turbo compressor and turbo refrigerator

Abstract

A turbo compressor having an impeller and a rotary shaft connected to the impeller, the turbo compressor including: a positioning unit that positions the impeller and the rotary shaft in a direction orthogonal to an axis of the rotary shaft; and a rotation regulating unit installed at a location different from the positioning unit and regulating relative rotation between the impeller and the rotary shaft around the axis, in which the rotation regulating unit includes an impeller-side regulating unit integrally formed with the impeller and a shaft-side regulating unit integrally formed with the rotary shaft and locked to the impeller-side regulating unit.

1 . A turbo compressor having an impeller and a rotary shaft connected to the impeller, the turbo compressor comprising:
 a positioning unit that positions the impeller and the rotary shaft in a direction orthogonal to an axis of the rotary shaft; and   a rotation regulating unit installed at a location different from the positioning unit and regulating relative rotation between the impeller and the rotary shaft around the axis,   wherein the rotation regulating unit includes an impeller-side regulating unit integrally formed with the impeller and a shaft-side regulating unit integrally formed with the rotary shaft and locked to the impeller-side regulating unit.   
     
     
         2 . The turbo compressor according to  claim 1 , wherein an outer peripheral shape of a cross section of the shaft-side regulating unit in a surface orthogonal to the axis includes a plurality of first arcs arranged around the axis and curving outward in a radial direction and second arcs inscribed to the adjacent first arcs to connect the plurality of first arcs and curving outward in a radial direction so as to have a smaller diameter than the first arcs. 
     
     
         3 . The turbo compressor according to  claim 2 , wherein the plurality of first arcs is arranged at regular intervals around the axis. 
     
     
         4 . The turbo compressor according to  claim 1 , wherein the impeller is fastened to the rotary shaft by a fastening member screwed to the rotary shaft, and the rotation regulating unit is installed to the impeller at a side opposite to the side fastened with the fastening member. 
     
     
         5 . The turbo compressor according to  claim 2 , wherein the impeller is fastened to the rotary shaft by a fastening member screwed to the rotary shaft, and the rotation regulating unit is installed to the impeller at a side opposite to the side fastened with the fastening member. 
     
     
         6 . The turbo compressor according to  claim 3 , wherein the impeller is fastened to the rotary shaft by a fastening member screwed to the rotary shaft, and the rotation regulating unit is installed to the impeller at a side opposite to the side fastened with the fastening member. 
     
     
         7 . The turbo compressor according to  claim 1 , wherein the impeller is formed so that a first end thereof has a smaller outer diameter than a second end in the direction of the axis, and the positioning unit is installed at a location closer to the first end than to the second end. 
     
     
         8 . The turbo compressor according to  claim 2 , wherein the impeller is formed so that a first end thereof has a smaller outer diameter than a second end in the direction of the axis, and the positioning unit is installed at a location closer to the first end than to the second end. 
     
     
         9 . The turbo compressor according to  claim 3 , wherein the impeller is formed so that a first end thereof has a smaller outer diameter than a second end in the direction of the axis, and the positioning unit is installed at a location closer to the first end than to the second end. 
     
     
         10 . The turbo compressor according to  claim 4 , wherein the impeller is formed so that a first end thereof has a smaller outer diameter than a second end in the direction of the axis, and the positioning unit is installed at a location closer to the first end than to the second end. 
     
     
         11 . The turbo compressor according to  claim 5 , wherein the impeller is formed so that a first end thereof has a smaller outer diameter than a second end in the direction of the axis, and the positioning unit is installed at a location closer to the first end than to the second end. 
     
     
         12 . The turbo compressor according to  claim 6 , wherein the impeller is formed so that a first end thereof has a smaller outer diameter than a second end in the direction of the axis, and the positioning unit is installed at a location closer to the first end than to the second end. 
     
     
         13 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 1 .   
     
     
         14 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 2 .   
     
     
         15 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 3 .   
     
     
         16 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 4 .   
     
     
         17 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 5 .   
     
     
         18 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 6 .   
     
     
         19 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 7 .   
     
     
         20 . A turbo refrigerator, comprising:
 a condenser that cools and liquefies a compressed refrigerant;   an evaporator that evaporates the liquefied refrigerant and cools an object to be cooled by taking evaporation heat from the object to be cooled; and   a compressor that compresses the refrigerant evaporated by the evaporator and supplies the refrigerant to the condenser,   wherein the compressor is the turbo compressor according to  claim 8 .