Turbo compressor and turbo refrigerator

Abstract

A turbo compressor according to the present invention supports a rotational shaft fixed to an impeller by a bearing in a freely rotatable manner, and supplies the lubricant oil to a plurality of sliding portions that are slid due to the rotation of the rotational shaft. Furthermore, the turbo compressor includes a oil supply nozzle in which a first injection hole, which injects the lubricant oil toward a predetermined first fueling place among a plurality of sliding portions to be supplied with the lubricant oil, and a second injection hole, which injects the lubricant oil toward a second fueling place different from the first fueling place, are provided. According to the present invention, it is possible to provide a turbo compressor capable of reducing the labor and the costs of manufacturing and a turbo refrigerator including the same.

1 . A turbo compressor which supports a rotational shaft to be fixed to an impeller by a bearing in a freely rotatable manner, and supplies a lubricant oil to a plurality of sliding portions that are slid due to the rotation of the rotational shaft, the compressor comprising:
 a oil supply nozzle in which a first injection hole, which injects the lubricant oil toward a predetermined first fueling place among a plurality of sliding portions to be supplied with the lubricant oil, and a second injection hole, which injects the lubricant oil toward a second fueling place different from the first fueling place, are provided.   
     
     
         2 . The turbo compressor according to  claim 1 , further comprising:
 a driving portion that generates a rotational power, and a pair of gears that transmits the rotational power of the driving portion to the rotational shaft,   wherein the first fueling place is the bearing, and the second fueling place is an engagement portion of the pair of gears.   
     
     
         3 . The turbo compressor according to  claim 2 , wherein a rolling bearing is used as the bearing, and the first fueling place is an inner ring of the rolling bearing. 
     
     
         4 . The turbo compressor according to  claim 1 , wherein the oil supply nozzle includes a first plane orthogonal to the extension direction of the first injection hole, and a second plane orthogonal to the extension direction of the second injection hole, the first injection hole is opened to the first plane, and the second injection hole is opened to the second plane. 
     
     
         5 . The turbo compressor according to  claim 2 , wherein the oil supply nozzle includes a first plane orthogonal to the extension direction of the first injection hole, and a second plane orthogonal to the extension direction of the second injection hole, the first injection hole is opened to the first plane, and the second injection hole is opened to the second plane. 
     
     
         6 . The turbo compressor according to  claim 3 , wherein the oil supply nozzle includes a first plane orthogonal to the extension direction of the first injection hole, and a second plane orthogonal to the extension direction of the second injection hole, the first injection hole is opened to the first plane, and the second injection hole is opened to the second plane. 
     
     
         7 . A turbo refrigerator according to the present invention which includes a condenser that cools and liquefies a compressed refrigerant, an evaporator that evaporates the liquefied refrigerant and removes vaporization heat from a cooling object to cool the cooling object, and a compressor that compresses the refrigerant evaporated by the evaporator and supplies the condenser with the refrigerant, wherein the turbo compressor according to  claim 1  is employed as the compressor. 
     
     
         8 . A turbo refrigerator according to the present invention which includes a condenser that cools and liquefies a compressed refrigerant, an evaporator that evaporates the liquefied refrigerant and removes vaporization heat from a cooling object to cool the cooling object, and a compressor that compresses the refrigerant evaporated by the evaporator and supplies the condenser with the refrigerant, wherein the turbo compressor according to  claim 2  is employed as the compressor. 
     
     
         9 . A turbo refrigerator according to the present invention which includes a condenser that cools and liquefies a compressed refrigerant, an evaporator that evaporates the liquefied refrigerant and removes vaporization heat from a cooling object to cool the cooling object, and a compressor that compresses the refrigerant evaporated by the evaporator and supplies the condenser with the refrigerant, wherein the turbo compressor according to  claim 3  is employed as the compressor. 
     
     
         10 . A turbo refrigerator according to the present invention which includes a condenser that cools and liquefies a compressed refrigerant, an evaporator that evaporates the liquefied refrigerant and removes vaporization heat from a cooling object to cool the cooling object, and a compressor that compresses the refrigerant evaporated by the evaporator and supplies the condenser with the refrigerant, wherein the turbo compressor according to  claim 4  is employed as the compressor. 
     
     
         11 . A turbo refrigerator according to the present invention which includes a condenser that cools and liquefies a compressed refrigerant, an evaporator that evaporates the liquefied refrigerant and removes vaporization heat from a cooling object to cool the cooling object, and a compressor that compresses the refrigerant evaporated by the evaporator and supplies the condenser with the refrigerant, wherein the turbo compressor according to  claim 5  is employed as the compressor. 
     
     
         12 . A turbo refrigerator according to the present invention which includes a condenser that cools and liquefies a compressed refrigerant, an evaporator that evaporates the liquefied refrigerant and removes vaporization heat from a cooling object to cool the cooling object, and a compressor that compresses the refrigerant evaporated by the evaporator and supplies the condenser with the refrigerant, wherein the turbo compressor according to  claim 6  is employed as the compressor.