Accession Number:

AD0679729

Title:

FROM THE EXPERIENCE OF EQUILIBRATING TURBINE ROTORS AT THE KALUGA TURBINE PLANT,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1968-01-25

Pagination or Media Count:

6.0

Abstract:

Some practical experiences gained during balancing of turbine rotors are discussed briefly and qualitatively. Since the balancing machinery for flexible shafts is not yet available, the factory balances the rotors prior to mounting. Use of conical centering heads on the rotors results in very low accuracy because the rotors have no shoulders. To eliminate this difficulty, the rotors are press fitted on a temporary hub. To decrease initial unbalance, the turbine blades are weighed, and equal weights are placed at diametrically opposed locations. It has been found that preliminary static balancing is unsatisfactory for some impellers up to 8000 newtons. In these cases, preliminary dynamic balancing is performed prior to assembly of the outer disk, impeller blades are machined to get initial balance. After assembly, a final dynamic balancing is performed. In the balancing of welded rotors with hollow internal chambers, it has been found useful to make sure that each section is concentric with respect to an outer control surface. During welding these control surfaces are used to obtain proper alignment. Author

Subject Categories:

  • Manufacturing and Industrial Engineering and Control of Production Systems
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE