Rotary machine and mounting method of atmosphere relief mechanism for rotary machine
View Patent ↗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.
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.
2. The rotary machine according to claim 1 , wherein between the rupture disc and a first holding part of the pair of annular holding parts that is disposed on a side of an interior space of the casing, a liquid gasket is provided.
3. The rotary machine according to claim 2 , wherein the liner has elastic coefficient approximately the same as or higher than the rupture disc.
4. The rotary machine according to claim 1 , wherein the plate-like liner has an elastic coefficient approximately the same as or higher than the rupture disc.
5. 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 stepped portion formed by an outer rim of one of the pair of annular holding parts protruding toward the other of the pair of annular holding parts on an outer circumferential side of the fastening members,
wherein the fastening member arrangement area is an annular-shaped area between the rupture disc and the stepped portion.
6. The rotary machine according to claim 5 , wherein the stepped portion is formed to have a height corresponding to thickness of the rupture disc.
7. The rotary machine according to claim 6 , wherein a holding part of the pair of annular holding parts that is disposed on a side of an interior space of the casing is formed separately from the casing.
8. The rotary machine according to claim 5 , wherein a holding part of the pair of annular holding parts that is disposed on a side of an interior space of the casing is formed separately from the casing.
9. A method for attaching to a rotary machine an atmosphere relief mechanism which comprises a rupture disc configured to close an opening formed in a casing of the rotary machine and to rupture when a pressure in the casing reaches a predetermined pressure, and a pair of annular holding parts for holding an outer edge of the rupture disc from both sides, the method comprising the steps of:
placing the rupture disc and a liner on a first holding part of the pair of annular holding parts that is disposed on a side of an interior space of the casing;
placing on the rupture disc and the liner, a second holding part of the pair of annular holding parts that is disposed on an atmosphere side; and
fastening the first holding part and the second holding part to each other by a plurality of fastening members arranged in a fastening member arrangement area which is disposed on an outer circumferential side of the rupture disc and which is an annular-shaped area between the rupture disc and the liner,
wherein in the step of placing the rupture disc and the liner, the liner is placed along an outer circumference of the rupture disc.