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Title: Shaft balancing

Abstract

A gas turbine engine has an internal drive shaft including one end connected to a driven load and an opposite end connected to a turbine wheel and wherein the shaft has an in situ adjustable balance system near the critical center of a bearing span for the shaft including two 360.degree. rings piloted on the outer diameter of the shaft at a point accessible through an internal engine panel; each of the rings has a small amount of material removed from its periphery whereby both of the rings are precisely unbalanced an equivalent amount; the rings are locked circumferentially together by radial serrations thereon; numbered tangs on the outside diameter of each ring identify the circumferential location of unbalance once the rings are locked together; an aft ring of the pair of rings has a spline on its inside diameter that mates with a like spline on the shaft to lock the entire assembly together.

Inventors:
 [1]
  1. Greenwood, IN
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
863464
Patent Number(s):
4177692
Assignee:
General Motors Corporation (Detroit, MI)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16F - SPRINGS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
shaft; balancing; gas; turbine; engine; internal; drive; including; connected; driven; load; opposite; wheel; situ; adjustable; balance; near; critical; center; bearing; span; 360; degree; rings; piloted; outer; diameter; accessible; panel; amount; material; removed; periphery; whereby; precisely; unbalanced; equivalent; locked; circumferentially; radial; serrations; thereon; tangs; outside; identify; circumferential; location; unbalance; pair; spline; inside; mates; lock; entire; assembly; outside diameter; turbine wheel; drive shaft; turbine engine; gas turbine; entire assembly; inside diameter; outer diameter; shaft including; material removed; circumferential location; /74/

Citation Formats

Irwin, John A. Shaft balancing. United States: N. p., 1979. Web.
Irwin, John A. Shaft balancing. United States.
Irwin, John A. Mon . "Shaft balancing". United States. https://www.osti.gov/servlets/purl/863464.
@article{osti_863464,
title = {Shaft balancing},
author = {Irwin, John A},
abstractNote = {A gas turbine engine has an internal drive shaft including one end connected to a driven load and an opposite end connected to a turbine wheel and wherein the shaft has an in situ adjustable balance system near the critical center of a bearing span for the shaft including two 360.degree. rings piloted on the outer diameter of the shaft at a point accessible through an internal engine panel; each of the rings has a small amount of material removed from its periphery whereby both of the rings are precisely unbalanced an equivalent amount; the rings are locked circumferentially together by radial serrations thereon; numbered tangs on the outside diameter of each ring identify the circumferential location of unbalance once the rings are locked together; an aft ring of the pair of rings has a spline on its inside diameter that mates with a like spline on the shaft to lock the entire assembly together.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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