In situ balancing of wind turbines

Details In situ balancing of wind turbines In situ balancing of wind turbines

1990-12-03

1992-08-25

Chapman, John E.

Measuring and testing

Rotor unbalance

Propeller, impeller, or fluid coupling

73458, 416144, G01M 128

Patent

active

051408562

ABSTRACT:
A slowly turning rotating mass, such as a wind turbine rotor, is balanced in situ by measuring the magnitude of a phenomenon, such as acceleration, created by rotor unbalance at a location on a mass support shaft which is close to the mass. The measurement of the phenomenon is made along a line selected to be insensitive to the bias of gravity on the mass. The measurement is made while the mass turns at its usual operating rate. The structure which supports the shaft is fixed as rigidly as possible in space while measurements of the phenomenon are made.

REFERENCES:
patent: 2108624 (1938-02-01), Thearle
patent: 2343383 (1944-03-01), Martin et al.
patent: 4510809 (1985-04-01), Fillion
patent: 4641039 (1987-02-01), Carre
"Bruel & Kjaer Application Notes: Static and Dynamic Balancing of Rigid Rotors"; 20 pps.
"Balancing Calculation Program WW 9021", Bruel & Kjaer, Mar. 1987, 15 pps.

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