Wind turbine
Abstract
A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine speed thereby setting blade pitch, is provided with a limiter (85) which restricts unwanted pitch change at operating speeds due to torsional creep of the flexible beam. The limiter allows twisting of the beam by the governor under excessive wind velocity conditions to orient the blades in stall pitch positions, thereby preventing overspeed operation of the turbine. In the preferred embodiment, the pitch governor comprises a pendulum (65,70) which responds to changing rotor speed by pivotal movement, the limiter comprising a resilient member (90) which engages an end of the pendulum to restrict further movement thereof, and in turn restrict beam creep and unwanted blade pitch misadjustment.
- Inventors:
- Issue Date:
- Research Org.:
- United Technologies Corporation, Hartford, CT (United States); Rockwell International Corp., Golden, CO (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 864354
- Patent Number(s):
- 4352629
- Application Number:
- 06/312604
- Assignee:
- United Technologies Corporation (Hartford, CT)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03D - WIND MOTORS
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
- DOE Contract Number:
- AC04-76DP03533
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1981 Oct 19
- Country of Publication:
- United States
- Language:
- English
- Subject:
- wind; turbine; type; airfoil; blade; 15; mounted; flexible; beam; 20; pitch; governor; 55; selectively; torsionally; twists; response; speed; setting; provided; limiter; 85; restricts; unwanted; change; operating; speeds; due; torsional; creep; allows; twisting; excessive; velocity; conditions; orient; blades; stall; positions; preventing; overspeed; operation; preferred; embodiment; comprises; pendulum; 65; 70; responds; changing; rotor; pivotal; movement; comprising; resilient; 90; engages; restrict; misadjustment; wind turbine; preferred embodiment; turbine speed; wind velocity; preventing overspeed; operating speed; rotor speed; flexible beam; pivotal movement; limiter comprising; /416/
Citation Formats
Cheney, Jr., Marvin C. Wind turbine. United States: N. p., 1982.
Web.
Cheney, Jr., Marvin C. Wind turbine. United States.
Cheney, Jr., Marvin C. Fri .
"Wind turbine". United States. https://www.osti.gov/servlets/purl/864354.
@article{osti_864354,
title = {Wind turbine},
author = {Cheney, Jr., Marvin C.},
abstractNote = {A wind turbine of the type having an airfoil blade (15) mounted on a flexible beam (20) and a pitch governor (55) which selectively, torsionally twists the flexible beam in response to wind turbine speed thereby setting blade pitch, is provided with a limiter (85) which restricts unwanted pitch change at operating speeds due to torsional creep of the flexible beam. The limiter allows twisting of the beam by the governor under excessive wind velocity conditions to orient the blades in stall pitch positions, thereby preventing overspeed operation of the turbine. In the preferred embodiment, the pitch governor comprises a pendulum (65,70) which responds to changing rotor speed by pivotal movement, the limiter comprising a resilient member (90) which engages an end of the pendulum to restrict further movement thereof, and in turn restrict beam creep and unwanted blade pitch misadjustment.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}