INDUCTIVE METHOD FOR MEASURING ROTOR BLADE VIBRATIONS ON TURBOMACHINES

An account is given here of further development of the method for measuring vibrations on a turbomachine rotor blade by means of a magnet let into the blade tip and a meandering winding bedded in the stator. In the successive transverse conductors of the winding, the rotating blade induces an ac voltage of a few millivolts and a few kilohertz, which is modulated with the frequency of the blade vibration. The frequency deviation is a direct measure for the vibration amplitude. By demodulation in a linear frequency discriminator, the analog plot of the vibration curve is obtained directly, true to amplitude and frequency.

• Corporate Authors:

  Sulzer Brothers Limited

  CH-8401
  Winterthur,   Switzerland 
• Authors:
  • Staeheli, W
• Publication Date: 1975

Media Info

• Features: References;
• Pagination: p. 177-185
• Serial:
  • Sulzer Technical Review
  • Volume: 57
  • Issue Number: 3
  • Publisher: Sulzer Brothers Limited

Subject/Index Terms

• TRT Terms: Blades (Machinery); Machinery; Measurement; Turbines; Vibration
• Old TRIS Terms: Machinery vibration; Turbine blade vibration; Turbomachinery; Vibration measurement
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00147798
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Mar 15 1977 12:00AM