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RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Improved Turbine Cylinder Bolting System

[+] Author and Article Information
M. C. Gosling

Total Quality and Manufacturing Technology, Westinghouse Canada Inc., P.G.M.D. (Hamilton) P.G.B.U., Hamilton, Ontario, Canada

J. Eng. Gas Turbines Power 119(4), 973-977 (Oct 01, 1997) (5 pages) doi:10.1115/1.2817085 History: Received February 01, 1996; Online November 19, 2007

Abstract

This paper describes the design and development of a new cylinder bolting system to replace the main joint hardware for both combustion (and steam) turbine applications. The new bolts are designed to be hydraulically tensioned to the specified preload and utilize ultrasonic verification of elongation. The new bolting system uses a reduced number of components in each assembly and the individual components themselves are of a simplified design. The new hardware can be applied to new equipment without modification and retrofitted to customer-owned equipment as a direct replacement for existing joint hardware. The prototype, production, and field testing of this hardware, the installation tooling; and ultrasonic elongation measuring equipment are described. This testing has shown significant savings in assembly and disassembly cycle times even after prolonged exposure to turbine operating temperatures in a corrosive environment. The new design of bolting is now standard equipment for the CW251B11/B12 combustion turbine manufactured by Westinghouse P.G.B.U.

Copyright © 1997 by The American Society of Mechanical Engineers
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