Generator inspection method

Patent metadata

Field	Value
Publication number	US-9780628-B2
Application number	US-201414908007-A
Country	US
Kind code	B2
Filing date	Sep 4, 2014
Priority date	Oct 30, 2013
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

In the present invention, the following are carried out: a shaft disconnecting step of disconnecting rotary machines that are respectively connected to both ends of a shaft of a generator; a gap forming step of forming a gap in a vertical direction between the generator and an installation stand; a pathway installing step of inserting into the gap a portion of a movement pathway member extending in a lateral direction which includes a horizontal direction component and a radial direction component of the shaft; a moving step of moving the generator in the lateral direction on the movement pathway member; and an inspecting step of inspecting the generator having undergone the moving step.

First claim

The invention claimed is:

1. A generator inspection method of inspecting a generator in which rotary machines are respectively connected to both ends of a shaft, the method comprising:
a shaft disconnecting step of disconnecting the rotary machines respectively connected to the ends of the shaft;
a gap forming step of forming a gap, in a vertical direction, between an installation stand of the generator and the generator;
a pathway installing step of inserting into the gap a portion of a movement pathway member extending in a lateral direction, the lateral direction including a horizontal direction component and a radial direction component of the shaft;
a moving step of moving the generator in the lateral direction on the movement pathway member; and
an inspecting step of inspecting the generator having undergone the moving step.

2. The generator inspection method according to claim 1 , wherein
following the gap forming step and before the moving step, a roller arranging step is carried out to arrange a roller, which rolls in the lateral direction, between the movement pathway member and the generator.

3. The generator inspection method according to claim 2 , wherein
in the roller arranging step, a roller carriage is arranged, the roller carriage being provided with at least one roller and a base which has a placement portion, on which an object is placed, above the at least one roller and which rotatably supports the at least one roller.

4. The generator inspection method according to claim 2 , wherein
the movement pathway member has a roller guide member that regulates a movement of the roller in a horizontal direction perpendicular to the lateral direction.

5. The generator inspection method according claim 2 , wherein
in the moving step, a rolling of the roller is restricted after moving the generator to an intended position in the lateral direction.

6. The generator inspection method according to claim 1 , wherein
in the gap forming step, the generator is lifted upward using a jack, and a gap is formed in the vertical direction between the installation stand of the generator and the generator.

7. The generator inspection method according to claim 1 , wherein
a structure that supports the movement pathway member is installed in advance at a position in the lateral direction of the generator, and
in the pathway installing step, the portion of the movement pathway member is inserted into the gap and then the movement pathway member is placed on the installation stand and the structure.

8. The generator inspection method according to claim 7 , wherein
the structure has a floor board and a support structure that supports the floor board from below, and
a portion of the floor board is cut out along a section on which the movement pathway member is placed above the support structure.

9. The generator inspection method according to claim 8 , wherein
the structure has a lid board that closes the cutout section of the floor board.

10. The generator inspection method according to claim 1 , wherein
in the inspecting step, the shaft is pulled out, in an axial direction, from a casing that covers the shaft.

11. The generator inspection method according to claim 1 , wherein,
after the inspecting step, the following steps are carried out:
a return moving step of returning the generator to an original position thereof above the installation stand in the horizontal direction by moving the generator in the lateral direction on the movement pathway member;
a gap forming step of forming a gap in the vertical direction between the movement pathway member and the generator;
a pathway removing step of removing the movement pathway member;
a placing step of placing the generator on the installation stand; and
a shaft connecting step of connecting the rotary machines respectively to the ends of the shaft.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Murata Yuichi

Classifications

• H02K15/00 Primary

  Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title

• H02K15/0006

  Electricity · mapped topic

• G01M13/00

  Testing of machine parts · CPC title

• H02K7/1815

  structurally associated with reciprocating piston engines (general aspects of generating sets, e.g. housing, F02B63/04) · CPC title

• H02K15/50

  Disassembling, repairing or modifying dynamo-electric machines (repairing of cooling fluid boxes H02K15/38) · CPC title