Sealing fin fixing apparatus and sealing fin fixing method

Patent metadata

Field	Value
Publication number	US-11534875-B2
Application number	US-202117349542-A
Country	US
Kind code	B2
Filing date	Jun 16, 2021
Priority date	Jun 17, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A sealing fin fixing apparatus can fix a sealing fin to a rotor in a shortened period of time to minimize variations of the pullout strength of the sealing fin. In the sealing fin fixing apparatus that fixes the sealing fin in a sealing groove defined in the outer circumference of the rotor of a rotary machine and includes a headstock for setting a rotor thereon, a Z-stage movable along a Z-axis, an X-stage movable along an X-axis, a tool rest supported on the X-stage, and a caulking tool mounted on the tool rest and including a shank and a pressing roller, while the pressing roller is being held against a caulking wire inserted, together with the sealing fin, in the sealing groove in the rotor that is set on the headstock, the headstock is actuated to rotate the rotor, thereby caulking the caulking wire to fix the sealing fin to the rotor.

First claim

What is claimed is:

1. A sealing fin fixing apparatus for fixing a sealing fin in a sealing groove defined in an outer circumference of a rotor of a rotary machine, the sealing fin fixing apparatus comprising:
a headstock for setting the rotor thereon;
a Z-stage movable along a Z-axis extending parallel to a rotational shaft of the headstock;
an X-stage supported on the Z-stage and movable along an X-axis in a direction perpendicular to the Z-axis;
a tool rest supported on the X-stage; and
a caulking tool mounted on the tool rest, wherein
the caulking tool includes a shank mounted on the tool rest and a pressing roller rotatably supported on the shank, the pressing roller having a rotational shaft mounted on the tool rest in a posture parallel to the rotational shaft of the headstock, and
while the pressing roller is being held against a caulking wire inserted, together with the sealing fin, in the sealing groove in the rotor that is set on the headstock, the headstock is actuated to rotate the rotor, thereby caulking the caulking wire to fix the sealing fin to the rotor.

2. The sealing fin fixing apparatus according to claim 1 , further comprising:
a holding roller for contacting the caulking wire before the pressing roller contacts the caulking wire.

3. The sealing fin fixing apparatus according to claim 1 , further comprising:
a cutting tool for, in place of the caulking tool, being mounted on the tool rest.

4. The sealing fin fixing apparatus according to claim 1 , further comprising:
a measuring instrument fixed to either the caulking tool or the tool rest, for measuring an outer diameter of the caulking wire or the sealing fin.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Segawa Kiyoshi
• Yanase Yuta
• Izumi Takeshi
• Saito Shoichi
• Yoshida Takashi
• Tachibana Shin

Classifications

• Y10T29/53687

  by rotation of work part · CPC title

• F05D2230/80

  Repairing, retrofitting or upgrading methods · CPC title

• F01D5/005

  Repairing methods or devices · CPC title

• Y10T29/5114

  Lathe and tool · CPC title

• B23P19/084 Primary

  for placing resilient or flexible rings, e.g. O-rings, circlips · CPC title