Wind turbine rotor
AssigneeALSTOM Renewable Technologies
InventorsPierre Pasquet, Marc Cavallé, Santiago Canedo Pardo
Life of this patent
Estimating the term…
Abstract
A wind turbine rotor includes a hub, a plurality of blades, and a pitch system for rotating a blade substantially along its longitudinal axis. The pitch system includes a bearing, a motor, and a gear system, wherein the gear system has a driving pinion operationally connected with the motor, an annular gear arranged to mesh with the driving pinion. Additional gear teeth are arranged to mesh with other parts of the gear system in a predefined blade position for wind speeds at or below a nominal wind speed such that upon movement from the predefined blade position, the additional gear teeth come into contact with the other parts of the gear system before the driving pinion comes into contact with the annular gear.
Claims18
A wind turbine rotor comprising
- a hub, a plurality of blades and at least one pitch system for rotating a blade substantially along its longitudinal axis, the pitch system comprising:
- a bearing, a motor and a gear system, the gear system comprising a driving pinion operationally connected with the motor, an annular gear arranged to mesh with the driving pinion,
- additional gear teeth, the additional gear teeth being arranged to mesh with other parts of the gear system at least in a predefined blade position for wind speeds at or below a nominal wind speed, and arranged such that upon movement from the predefined blade position, the additional gear teeth come into contact with the other parts of the gear system before the driving pinion comes into contact with the annular gear;
- and
- wherein the additional gear teeth and the other parts of the gear system have less backlash than the driving pinion and the annular gear.
A wind turbine rotor comprising:
- a hub, a plurality of blades and at least one pitch system for rotating a blade substantially along its longitudinal axis, the pitch system comprising:
- a bearing, a motor and a gear system, the gear system comprising a driving pinion operationally connected with the motor, an annular gear arranged to mesh with the driving pinion, and
- additional gear teeth, the additional gear teeth being arranged to mesh with other parts of the gear system at least in a predefined blade position for wind speeds at or below a nominal wind speed, and arranged such that upon movement from the predefined blade position, the additional gear teeth come into contact with the other parts of the gear system before the driving pinion comes into contact with the annular gear;
- and
- wherein the additional gear teeth comprise an additional pinion coaxially mounted on the driving pinion and arranged to mesh with the annular gear.
A wind turbine rotor comprising:
- a hub, a plurality of blades and at least one pitch system for rotating a blade substantially along its longitudinal axis, the pitch system comprising:
- a bearing, a motor and a gear system, the gear system comprising a driving pinion operationally connected with the motor, an annular gear arranged to mesh with the driving pinion, and
- additional gear teeth, the additional gear teeth being arranged to mesh with other parts of the gear system at least in a predefined blade position for wind speeds at or below a nominal wind speed, and arranged such that upon movement from the predefined blade position, the additional gear teeth come into contact with the other parts of the gear system before the driving pinion comes into contact with the annular gear;
- and
- wherein the additional gear teeth comprise an additional annular gear segment arranged at least in a predefined blade position for wind speeds at or below the nominal wind speed, the additional annular gear segment being arranged to mesh with the driving pinion.
Dependencies are inferred from the claim text.