Compressor system

Abstract

A compressor system includes: a compressor provided with a rotor and a stator forming, by covering the rotor, a flow path of a fluid to be compressed; and a sacrificial member disposed in an accommodation space in communication with the flow path. The sacrificial member includes a portion to be measured disposed in the accommodation space and strained by a pressure of the fluid.

1 . A compressor system, comprising:
 a compressor provided with a rotor and a stator forming, by covering the rotor, a flow path of a fluid to be compressed; and   a sacrificial member disposed in an accommodation space in communication with the flow path, wherein   the sacrificial member includes a portion to be measured disposed in the accommodation space and strained by a pressure of the fluid.   
     
     
         2 . The compressor system according to  claim 1 , wherein the portion to be measured is formed of a metal material having a composition identical to a composition of a metal material forming the rotor. 
     
     
         3 . The compressor system according to  claim 1 , wherein
 the fluid is a hydrogen gas, and   the accommodation space is connected to an outlet flow path.   
     
     
         4 . The compressor system according to  claim 3 , wherein the outlet flow path is, in the flow path, a flow path through which the fluid compressed and having the highest pressure flows. 
     
     
         5 . The compressor system according to  claim 1 , wherein
 the fluid is a corrosive gas, and   the accommodation space is connected to an inlet flow path.   
     
     
         6 . The compressor system according to  claim 5 , wherein the inlet flow path is, in the flow path, a flow path through which the fluid having the lowest pressure before compression flows. 
     
     
         7 . The compressor system according to  claim 1 , wherein
 the accommodation space is open at an outer surface of the stator facing outside, and   the compressor system further includes an inspection cover that is attachable to and detachable from the stator and closes an opening of the accommodation space.   
     
     
         8 . The compressor system according to  claim 1 , further comprising a strain gauge attached to the portion to be measured and configured to detect a strain amount of the portion to be measured. 
     
     
         9 . The compressor system according to  claim 1 , wherein
 the sacrificial member includes
 a plate-like C-ring portion that is convexly curved, disposed in a C shape, and has a plate shape and 
 a pressing and retaining portion that retains the C-ring portion with both ends of the C-ring portion being pressed to be made close to each other, 
   a convex portion of the C-ring portion is the portion to be measured, and   the pressing and retaining portion presses the C-ring portion to apply a higher stress to the portion to be measured than a maximum stress acting on the rotor during a rated operation of the compressor with the portion to be measured being disposed therebetween.   
     
     
         10 . The compressor system according to  claim 1 , wherein
 the sacrificial member includes a diaphragm plate configured to partition the accommodation space into a first space in communication with the flow path and a second space open to the atmosphere, and   at least part of the diaphragm plate is the portion to be measured.   
     
     
         11 . The compressor system according to  claim 1 , wherein
 the sacrificial member includes
 a piston ring portion configured to partition the accommodation space into a first space in communication with the flow path and a second space open to the atmosphere, 
 a fixed plate portion disposed immovably in the first space, and 
 a rod portion formed in a columnar shape and connecting the piston ring portion and the fixed plate portion, and 
   at least part of the rod portion is the portion to be measured.   
     
     
         12 . The compressor system according to  claim 1 , wherein
 the accommodation space is formed in the stator in an annular shape surrounding a rotor shaft of the rotor,   the sacrificial member includes a columnar portion fixed to the rotor, and   the columnar portion includes, as the portion to be measured, a recessed portion recessed while being constricted from an outer surface of the columnar portion.   
     
     
         13 . The compressor system according to  claim 12 , wherein
 the fluid is a hydrogen gas,   the rotor includes a plurality of stages of impellers rotatably attached to the rotor shaft and configured to compress the fluid while being arranged in a direction in which the rotor shaft extends, and   the accommodation space is connected to a compression flow path of a rearmost-stage impeller among the plurality of stages of the impellers.   
     
     
         14 . The compressor system according to  claim 12 , wherein
 the fluid is a corrosive gas,   the rotor includes a plurality of stages of impellers rotatably attached to the rotor shaft and configured to compress the fluid in a state of being arranged in a direction in which the rotor shaft extends, and   the accommodation space is connected to a compression flow path of a foremost-stage impeller among the plurality of stages of impellers.   
     
     
         15 . The compressor system according to  claim 12 , wherein
 a scope hole that extends from the accommodation space to an outer surface of the stator and is open to the outer surface of the stator is formed in the stator, and   the compressor system further includes an inspection cover that is attachable to and detachable from the outer surface of the stator and closes an opening of the scope hole.