Rotor of rotary machine and rotary machine

Abstract

A rotor ( 10 ) of a rotary machine (T 1 ) according to the invention includes a plurality of rotor members ( 20, 30, and 40 ) which are joined to each other in the axial direction in which the axis (P) extends, and among the plurality of rotor members ( 20, 30 and 40 ), the first rotor member ( 30 ) in hydraulic fluid injection portions ( 3 a and 3 b ) of a passageway ( 3 ) is formed of Ni-based alloy so that the inside thereof is hollow throughout the entire length in the axial direction.

1 . A rotor of a rotary machine of which an outer peripheral portion extending about an axis is surrounded by a stator and in which a hydraulic fluid circulates in a passageway defined between the stator and the outer peripheral portion, the rotor comprising:
 a plurality of rotor members that are joined to each other in the axial direction in which the axis extends,   wherein a first rotor member which is included in the plurality of rotor members and which is located in a hydraulic fluid injection portion of the passageway is formed of an Ni-based alloy, and   the inside of the first rotor member is hollow throughout the entire length in the axial direction.   
     
     
         2 . The rotor of the rotary machine according to  claim 1 ,
 wherein the plurality of rotor members include a second rotor member that is adjacent to the first rotor member in the axial direction and is formed of high Cr-steel.   
     
     
         3 . The rotor of the rotary machine according to  claim 1 ,
 wherein the first rotor member is formed so that the thickness of the center portion in the axial direction is greater than or equal to the thickness of the end portion in the axial direction and a value of a ratio between the inner diameter and the outer diameter at the center portion in the axial direction is greater than or equal to ½.   
     
     
         4 . The rotor of the rotary machine according to  claim 1 ,
 wherein a plurality of the hydraulic fluid injection portions is formed, and   wherein the inner diameters of at least two or more of the plurality of hydraulic fluid injection portions are different from each other in the first rotor member.   
     
     
         5 . The rotor of the rotary machine according to  claim 1 ,
 wherein the inner diameters of a plurality of portions in the axial direction are different from each other in the first rotor member.   
     
     
         6 . The rotor of the rotary machine according to  claim 1 ,
 wherein in at least part of the first rotor member in the axial direction, a hole is formed in a tapered shaped so that the inner diameter gradually decreases toward one end side of the rotor member from the other end side.   
     
     
         7 . The rotor of the rotary machine according to  claim 1 ,
 wherein the Ni-based alloy includes 0.15 wt % or less of C, 1 wt % or less of Si, 1 wt % or less of Mn, 5 to 15 wt % of Cr, 17 to 25 wt % of including one or two or more of Mo, W, and Re; Mo+(W+Re)/2, 0.2 to 2 wt % of Al, 0.5 to 4.5 wt % of Ti, 10 wt % or less of Fe, including one or two of 0.02 wt % or less of B and 0.2 wt % or less of Zr, 2.5 to 7.0 at % of Al+Ti, and the remainder of Ni and inevitable impurities.   
     
     
         8 . The rotor of the rotary machine according to  claim 1 ,
 wherein the Ni-based alloy includes 0.15 wt % or less of C, 1 wt % or less of Si, 1 wt % or less of Mn, 5 to 20 wt % of Cr, 17 to 26 wt % of Mo, 17 to 27 wt % of Mo+(W+Re)/2, 0.1 to 2 wt % of Al, 0.1 to 2 wt % of Ti, 10 wt % or less of Fe, 0.02 wt % or less of B, 0.2 wt % or less of Zr, 1 to 5.5 at % of Al+Ti, and the remainder of Ni and inevitable impurities.   
     
     
         9 . The rotor of the rotary machine according to  claim 1 ,
 wherein the Ni-based alloy includes 0.15 wt % or less of C, 1 wt % or less of Si, 1 wt % or less of Mn, 5 to 20 wt % of Cr, 17 to 27 wt % of including one or two or more of Mo, W, and Re; Mo+(W+Re)/2, 0.1 to 2 wt % of Al, 0.1 to 2 wt % of Ti, 10 wt % or less of Fe, 0.001 to 0.02 wt % of B, 0.001 to 0.2 wt % of Zr, 1.5 wt % or less of Nb+Ta/2, 5 wt % or less of Co, and the remainder of Ni and inevitable impurities.   
     
     
         10 . The rotor of the rotary machine according to  claim 1 ,
 wherein the Ni-based alloy includes 0.15 wt % or less of C, 1 wt % or less of Si, 1 wt % or less of Mn, 5 to 20 wt % of Cr, 10 wt % or less of W, 5 to 20 wt % of including one or two or more of Mo, W, and Re; Mo+(W+Re)/2, 0.1 to 2.5 wt % of Al, 0.10 to 0.95 wt % of Ti, 4 wt % or less of Fe, 0.001 to 0.02 wt % of B, 0.001 to 0.2 wt % of Zr, 1.5 wt % or less of Nb+Ta/2, 2.0 to 6.5 at % of Al+Ti+Nb+Ta, and the remainder of Ni and inevitable impurities.   
     
     
         11 . The rotor of the rotary machine according to  claim 1 ,
 wherein the Ni-based alloy includes 0.005 to 0.1 wt % of C, 8 to 15 wt % of Cr, 5 to 20 wt % of W, 1 to 7 wt % of Mo, 0.5 to 1.0 wt % of Al, 1.0 to 2.5 wt % of Ti, and the remainder of Ni and inevitable impurities.   
     
     
         12 . The rotor of the rotary machine according to  claim 1 ,
 wherein the Ni-based alloy includes 0.005 to 0.15 wt % of C, 8 to 22 wt % of Cr, 5 to 30 wt % of Co, 5 to 20 wt % of W, 1 to 9 wt % of Mo, 0.1 to 2.0 wt % of Al, 0.3 to 2.5 wt % of Ti, 0.015 wt % or less of B, 0.01 wt % or less of Mg, and the remainder of Ni and inevitable impurities.   
     
     
         13 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 1 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         14 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 2 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         15 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 3 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         16 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 4 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         17 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 5 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         18 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 6 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         19 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 7 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.   
     
     
         20 . A rotary machine comprising:
 the rotor of the rotary machine according to  claim 8 , and   a stator which surrounds the rotor and in which a hydraulic fluid is injected into a passageway defined between the stator and the rotor.