Wind turbine blade pitch control system
A pitch control system for a multibladed variable pitch wind turbine is described. Each of the turbine blades is pivotally driven about the longitudinal axis thereof independently of the other blades by at least a pair of hydraulic actuators. The actuators are supplied with pressurized hydraulic fluid from a first source thereof under conditions of normal pitch change adjustment. Under conditions wherein feathering of the blades is required, the actuators are supplied with hydraulic fluid from second sources thereof such that one of the actuators associated with each of the blades is supplied with fluid from one second source and a second actuator is provided with fluid from a redundant second source whereby blade feathering may be effected despite a malfunction of one of the redundant sources or one of the actuators. In one of the two preferred embodiments disclosed, the first and second fluid sources are maintained in mutual communication whereby fluid from the second sources thereof may supplement fluid from the first source under conditions of normal blade pitch adjustment.
- Assignee:
- United Technologies Corp
- Patent Number(s):
- US 4348155
- OSTI ID:
- 6505323
- Resource Relation:
- Patent File Date: Filed date 17 Mar 1980; Other Information: PAT-APPL-130658
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
TURBINE BLADES
CONTROL SYSTEMS
WIND TURBINES
HYDRAULIC CONTROL DEVICES
TILT MECHANISMS
ACTUATORS
INCLINATION
WIND POWER
CONTROL EQUIPMENT
ENERGY SOURCES
EQUIPMENT
MACHINERY
POWER
RENEWABLE ENERGY SOURCES
TURBINES
TURBOMACHINERY
170602* - Wind Energy Engineering- Turbine Design & Operation