Fixing device, rotary machine, manufacturing method of rotary machine, assembling method of rotary machine, and disassembling method of rotary machine

A manufacturing method of a rotary machine for fixing a relative position in a rotational direction of an outer member and an inner member of a stationary body of a rotary machine and manufacturing the rotary machine, the manufacturing method comprising the steps of:

• inserting, into a through hole passing through the outer member in a radial direction of the rotary machine and having a stepped portion formed therein to have a larger diameter at a portion on an outer side in the radial direction of the rotary machine than at a portion on an inner side in the radial direction, a radial pin that includes a flange portion with an outside diameter larger than a diameter of the through hole at the portion on the inner side in the radial direction of the rotary machine and smaller than a diameter of the through hole at the portion on the outer side in the radial direction of the rotary machine, bringing the stepped portion and the flange portion into contact, and inserting an end of the radial pin on the inner side in the radial direction of the rotary machine into a concave portion of the inner member placed on the inner side of the outer member in the radial direction of the rotary machine;
• inserting a seal unit into the through hole having the radial pin inserted therein;
• and
• biasing the seal unit inserted into the through hole inward in the radial direction of the rotary machine, and bringing the seal unit into contact with an inner circumferential surface of the through hole along the radial direction of the rotary machine to seal the through hole.

A disassembling method of a rotary machine for disassembling a rotary machine having an inner member and an outer member of a stationary body fixed with a fixing device,

• the fixing device including, in a through hole formed in the outer member, a radial pin that includes a part on an inner side in a radial direction of the rotary machine inserted into a concave portion of the inner member, a seal unit that is located farther on an outer side in the radial direction of the rotary machine than the radial pin, and that is in contact with an inner circumferential surface of the through hole along the radial direction of the rotary machine to seal the through hole, and a cap member fixed to the outer member farther on the outer side in the radial direction of the rotary machine than the seal unit, the disassembling method comprising the steps of:
• disassembling the cap member inserted into the through hole;
• taking the seal unit out of the through hole;
• and
• taking the radial pin out of the through hole, wherein
• the seal unit includes a sleeve being in contact with the through hole,
• the step of taking the seal unit out of the through hole includes the steps of
• attaching a jig to an engagement portion of a target member that is in direct or indirect contact with a surface of the sleeve on the inner side in the radial direction of the rotary machine and that includes the engagement portion to which the jig is attachable from the outer side in the radial direction of the rotary machine formed on a surface on the outer side in the radial direction of the rotary machine, and
• taking the sleeve out of the through hole along with the target member, and
• the jig is inserted into the sleeve and the jig is attached to the engagement portion at the step of taking the seal unit out of the through hole.

A disassembling method of a rotary machine for disassembling a rotary machine having an inner member and an outer member of a stationary body fixed with a fixing device,

• the fixing device including, in a through hole formed in the outer member, a radial pin that includes a part on an inner side in a radial direction of the rotary machine inserted into a concave portion of the inner member, a seal unit that is located farther on an outer side in the radial direction of the rotary machine than the radial pin, and that is in contact with an inner circumferential surface of the through hole along the radial direction of the rotary machine to seal the through hole, and a cap member fixed to the outer member farther on the outer side in the radial direction of the rotary machine than the seal unit, the disassembling method comprising the steps of:
• disassembling the cap member inserted into the through hole;
• taking the seal unit out of the through hole;
• and
• taking the radial pin out of the through hole, wherein
• the outer member includes a structure divided into an outer-member upper half and an outer-member lower half,
• the disassembling method includes the steps of
• passing a tool through the through hole of the outer-member upper half or the outer-member lower half from which the radial pin has been taken out, and holding the inner member with the tool, and
• relatively moving the outer-member upper half or the outer-member lower half from which the radial pin has been taken out with respect to the inner member in a state where the inner member is held with the tool.