TECHNICAL PAPERS: Gas Turbines: Marine Applications

Development, Testing, and Implementation of a Gas Turbine Starting Clutch With Manual Turning Feature for U.S. Navy Ships

[+] Author and Article Information
Morgan L. Hendry

 SSS Clutch Company, Inc., 610 West Basin Road, New Castle, DE 19720engineering@sssclutch.com

Matthew G. Hoffman

 Surface Combatant Gas Turbine Engineering Branch, NAVSEA Philadelphia, Code 934, Philadelphia, PA 19112matthew.g.hoffman@navy.mil

J. Eng. Gas Turbines Power 129(3), 785-791 (Jul 26, 2006) (7 pages) doi:10.1115/1.2434347 History: Received June 14, 2006; Revised July 26, 2006

Most gas turbine generators rely on an automatic-engaging, free-wheel clutch to connect a starting motor to accelerate the gas turbine generator from zero to some intermediate speed to enable ignition and then provide torque assistance to a higher speed until the gas turbine is self-sustaining. The U.S. Navy has used various designs of starter motors and clutches for its gas turbine fleet. In addition, there has been a requirement to periodically borescope each gas turbine, which has necessitated removal of the starting system and clutch assembly in each instance. This paper examines the U.S. Navy experience with starting clutches and provides details of the development and testing of a synchronous-self-shifting clutch with an additional, stationary, manual turning feature to provide very slow and precise gas turbine rotor rotation for borescope purposes. This paper also gives details of the installation of the first two prototype clutches on the USS Ramage, DDG 61, operating experience for approximately four years, and possible future installations of this type of clutch in U.S. Navy gas turbine generator sets.

Copyright © 2007 by American Society of Mechanical Engineers
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Grahic Jump Location
Figure 2

U.S. Navy starter installations

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Figure 3

RIMSS gearbox design

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Figure 4

Failure and parts cost analysis

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Figure 1

SSGTG Model AG9140 RF

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Figure 5

Undamaged starter clutch

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Figure 6

Failed starter clutch

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Figure 7

SSS clutch principle of operation

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Figure 8

Primary and secondary pawls (PRISEC)

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Figure 9

Size 54T SSS clutch for DD 963 Class starters

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Figure 10

Size 45T SSS clutch for DDG 51 Class starters

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Figure 13

RIMSS transfer gearbox installation

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Figure 14

Size 38T SSS clutch with turning tool

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Figure 15

Size 38T SSS clutch without turning tool

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Figure 11

Installation onboard USS Ramage

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Figure 12

Experience onboard USS Ramage



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