Title:
CONTACT FACE BEARING PRESSURE MEASURING DEVICE FOR MOVING BLADE, AXIAL FLOW ROTARY MACHINE AND STEAM TURBINE
Document Type and Number:
Japanese Patent JP2003138910
Kind Code:
A
Abstract:
To quantitatively evaluate contact pressure (frictional reaction force) of a shroud 4 by a direct value as an electric signal.
A piezoelectric element 6 is disposed on a contact face 5 of the shroud 4 to fetch the electric signal of the contact pressure. The direct value as an electric signal of voltage generated in the piezoelectric element 6 depending on the contact pressure is evaluated, and the direct value as an electric signal of the contact pressure (frictional reaction force) of the shroud 4 is quantitatively evaluated. Therefore, it can be directly checked that the frictional reaction force is in a state where damping force at the time of operation is maximum.
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Inventors:
MORI KAZUISHI
Application Number:
JP2001333836A
Publication Date:
May 14, 2003
Filing Date:
October 31, 2001
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F01D5/16; F01D5/22; F01D25/00; F02C7/00; F04D29/38; (IPC1-7): F01D25/00; F01D5/16; F01D5/22; F02C7/00; F04D29/38
Attorney, Agent or Firm:
Toshiro Mitsuishi (2 outside)