Rotary machine and mounting method of atmosphere relief mechanism for rotary machine

摘要

A rotary machine is provided with a casing and an atmosphere relief mechanism (20) for closing an opening (12) for atmospheric release formed in the casing and relieving pressure of inner fluid to atmosphere when a pressure in the casing rises. The atmosphere relief mechanism includes: a rupture disc (24) configured to rupture when the pressure in the casing reaches a predetermined pressure; a pair of annular holding parts (22, 27) arranged to hold an outer edge of the rupture disc from both sides; a plurality of fastening members (29) for fastening the pair of annular holding parts to each other so as to hold the rupture disc between the pair of annular holding parts; and an annular spacer part (25) provided along an outer circumference of the rupture disc.

主权项

1. A rotary machine comprising:
a casing; and an atmosphere relief mechanism for closing an opening for atmosphere relief formed in the casing and relieving pressure of inner fluid to atmosphere when a pressure in the casing rises, wherein the atmosphere relief mechanism comprises: a rupture disc configured to rupture when the pressure in the casing reaches a predetermined pressure; a pair of annular holding parts arranged to hold an outer edge of the rupture disc from both sides; a plurality of fastening members for fastening the pair of annular holding parts to each other so as to hold the rupture disc between the pair of annular holding parts, the plurality of fastening members being arranged in a fastening member arrangement area which is disposed on an outer circumferential side of the rupture disc; and an annular spacer part provided along an outer circumference of the rupture disc, and wherein the annular spacer part is a plate-like liner formed separately from the pair of annular holding parts, wherein the fastening member arrangement area is an annular-shaped area between the rupture disc and the liner.