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TEMPERATURE MEASURING SYSTEM FOR ROTATING MACHINES

  • US 3,824,857 A
  • Filed: 08/07/1972
  • Issued: 07/23/1974
  • Est. Priority Date: 08/07/1972
  • Status: Expired due to Term
First Claim
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1. A temperature monitoring system for monitoring the rotor temperature of a machine having a rotation portion and a stationary portion, said system being independent of axial movements of the rotor shaft, comprising:

  • a. temperature sensing means associated with the rotating portion for producing a temperature signal indicative of the temperature of the rotating portion;

    b. signal conversion means associated with the rotating portion and connected to receive the temperature signal from the temperature sensing means, the signal conversion means operable to produce an intermediate signal having a frequency indicative of the value of the temperature signal;

    c. signal coupling means associated with the rotating portion and the stationary portion of the machine and connected to receive the intermediate signal, the signal coupling means operable to convey the intermediate signal from the rotating portion to the stationary portion of the machine; and

    d. output means associated with the stationary portion of the machine and connected to receive the intermediate signal from the signal coupling means, the output means responsive only to the frequency of the intermediate signal and operable to produce output signals indicative of the temperature of the rotating portion, whereby the output signals are not affected by axial movements of the rotor.

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