Rotor turning device for large turbine/generator in-situ rotors

Patent metadata

Field	Value
Publication number	US-9784136-B2
Application number	US-201414507879-A
Country	US
Kind code	B2
Filing date	Oct 7, 2014
Priority date	Jul 30, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A tool assembly for safely rotating a heavy turbine generator rotor for alignment and maintenance purposes. The tool assembly includes a plurality of segments mounted to an outer face of a coupling affixed to an end of a shaft of the rotor, where the segments include a plurality of segment teeth extending beyond an outer edge of the coupling. A tool is positioned adjacent to the coupling and includes a support assembly, a hydraulic ram and a ratcheting pawl. The ratcheting pawl includes a drive pin positioned to engage the teeth of the segments, where extension of a piston rod from the hydraulic ram causes the coupling and shaft to rotate.

First claim

What is claimed is:

1. A tool assembly operatively connected to and rotating a shaft of a rotor associated with a high power generator, said rotor shaft including a shaft coupling mounted at an end thereof, said tool assembly comprising:
at least one segment mounted to an outer face of the coupling, said at least one segment including a plurality of segment teeth extending beyond an outer edge of the coupling;
a tool positioned adjacent to the coupling, said tool including a lower support and an upper support secured together by a first pivot pin, said upper support having an L-shaped portion comprising a bottom plate and a vertical plate, and including a horizontal load bar mounted to the vertical plate, the horizontal load bar configured to be positioned on a vertical support member such that the upper support rests on top of the support member, said tool further including a hydraulic ram secured to the upper support by a second pivot pin, said hydraulic ram including a piston rod, said tool further including a ratcheting pawl mounted to the piston rod by a third pivot pin, said ratcheting pawl including a drive pin positioned to engage the teeth of the at least one segment, where extension of the piston rod from the hydraulic ram causes the coupling and shaft to rotate; and
a tensioning member mounted to the hydraulic ram and the horizontal load bar and being configured to provide tension to hold the ratcheting pawl to the segment as the piston rod is being retracted.

2. The tool assembly according to claim 1 wherein the vertical support member is a wall of a generator housing.

3. The tool assembly according to claim 1 wherein the position of the first pivot pin coupled to the upper and lower supports and the vertical offset of the position of the second pivot pin coupled to the upper support and the hydraulic ram is selected so that a higher percentage of a vertical load from the shaft is on the lower support than on the vertical support member.

4. The tool assembly according to claim 3 wherein the position of the first and second pins causes about 80% of the vertical load to be on the lower support and about 20% of the vertical load to be on the support member.

5. The tool assembly according to claim 1 wherein the ratcheting pawl includes a reaction pin mounted to a separate one of the teeth than the drive pin and being configured to hold the ratcheting pawl in place as the coupling rotates.

6. The tool assembly according to claim 1 wherein the at least one segment is four segments mounted to the front face of the coupling to form a ring.

7. The tool assembly according to claim 1 further comprising a plurality of support pads mounted to the lower support, said support pads being adjustable so as to level the tool.

Assignees

• Siemens Energy Inc

Inventors

• Campbell Ira J
• Wasileski Robert F
• Dickson Johnny R
• Payan Gabriel A

Classifications

• F05D2230/72

  Maintenance · CPC title

• F16H31/005

  with pawls driven by a reciprocating or oscillating transmission member (F16H31/002, F16H31/004 take precedence) · CPC title

• F02C7/32

  Arrangement, mounting, or driving, of auxiliaries · CPC title

• F01D25/285 Primary

  Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures · CPC title

• F01D25/34 Primary

  Turning or inching gear · CPC title