5 Claims. (Cl. 170-163) This invention relates to variable pitch propellers, particularly for water craft, and it has for its object to provide an improved form and construction of variable pitch propeller mechanism which is especially robust and efficient in operation. The invention further...

A pitch control system for a multibladed variable pitch wind turbine. 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.

Variable pitch propeller, particularly for watercraft

Wind turbine blade pitch control system

Double crank controllable pitch propeller

Pitch control means for variable pitch propellers

Hydraulic variable pitch propellers

The invention relates to a device for adjusting the blades of a ship's propeller during service, its purpose being to make it possible for the device to be built into the hub or the shaft even though the adjusting forces are great. In ship's propellers, as opposed to aircraft propellers the...

Variable pitch propeller, particularly for watercraft

Citations

Wind turbine blade pitch control system

Double crank controllable pitch propeller

Pitch control means for variable pitch propellers

Hydraulic variable pitch propellers

Device for adjusting the blades of ships' propellers

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