Harry R Martin

US Patent:

41738691, Nov 13, 1979

Filed:

Feb 9, 1978

Appl. No.:

5/876396

Inventors:

James A. Martin - Newtown Township, Delaware County PA
Harry F. Martin - Middletown PA
William R. Berry - Camden NJ

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

F01K 1302

US Classification:

60646

Abstract:

Apparatus and method for automatically determining and indicating that the rotor of a steam turbine has attained a predetermined minimal temperature. Means are utilized for measuring axial dimensional changes of the steam turbine cylinder and rotor due to an increased temperature and summing pertinent axial dimensional changes thereby determining the axial expansion of the rotor which in turn, through known physical properties of the rotor material, corresponds to a temperature increase. This increase of the temperature added to the initial temperature of the rotor provides the total temperature, and upon the total temperature reaching a predetermined value, the steam turbine is available to be brought up to speed and loaded.