Method of making blade supports

Details Method of making blade supports Method of making blade supports

1981-12-07

1983-10-11

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156245, 264258, B65H 8100

Patent

active

044090501

ABSTRACT:
Wind generator apparatus employs an induction generator with a wind-driven rotor. Connection of the induction generator to AC power lines is controlled by apparatus that compares generator rpm and line frequency. The rotor blades have a pretwisted, varying-chord inboard portion and an untwisted, constant-chord outboard portion. The blades are self-starting, operate efficiently over a range of wind speeds with constant pitch maintained by a torsional biasing mechanism, and pitch up automatically when the normal rpm operating range is exceeded. An improved blade-supporting spar of low torsional stiffness has an I-beam configuration with filament-wound flanges. A pitch damper prevents torsional oscillations while permitting the blades to pitch up readily. The rotor, which includes a teetering hub, is free to weather-vane about the axis of a supporting tower, but a yaw damper limits angular velocity. A guy wire and gin pole arrangement stabilizes the tower and permits easy relating and lowering of the tower.

REFERENCES:
patent: 3743069 (1973-07-01), Barnett
patent: 3943020 (1976-03-01), Ashton et al.
patent: 3950115 (1976-04-01), Eulen
patent: 4096012 (1978-06-01), Belko et al.
patent: 4226916 (1980-10-01), Schultz
Boing Rotors, Aviation Week & Space Technology, Mar. 20, 1978, vol. 108, No. 12.

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