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A method and device for braking a wind turbine in emergency situations

An emergency, wind turbine technology, applied in the control of wind turbines, wind turbines, motors, etc., can solve problems such as the inability to adjust the pitch angle and the inability to limit the output power

Inactive Publication Date: 2017-08-29
上海乐普能源科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide "redundant" security for each blade, and to provide the following solution for the situation that the pitch angle cannot be adjusted due to the failure of the pitch control system, resulting in the inability to limit the output power: once the blade When the torque in the reverse direction is applied, each brake is opened or kept released; when the blade is subjected to the torque in the feathering direction, the brakes are immediately closed

Method used

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  • A method and device for braking a wind turbine in emergency situations
  • A method and device for braking a wind turbine in emergency situations
  • A method and device for braking a wind turbine in emergency situations

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Embodiment Construction

[0053] An additional emergency adjustment of the rotatably mounted fan blades 29 on the hub can be achieved by switching off the solenoid valve 14 . The end of the shaft of the actuating drive 13 thus has a position brake 10 with brake pads 17, said position brake 10 being fastened to the flange 12 by means of bolts 10.1.

[0054] In addition, if figure 1 As shown, the brake 10 comprises a release lever 11 with a small spring 19 which is pulled to the neutral position with a small force.

[0055] The flange 12 is rotatably connected to the casing of the actuator drive mechanism 13 by using a fixed connection 24 . As a result of the rotation of the flange 12 , a small rotation angle is released at the housing of the position brake 10 .

[0056] If it is necessary to go to the blade position, and in the event of failure of the electric opening of the position brake 10, and the position brake 10 blocks the motor shaft 16, or one or more actuators 13 do not generate torque, when...

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Abstract

The invention provides a method and device for braking a wind turbine in an emergency. When a standard emergency device cannot enable the draught-fan pitch angles of draught-fan blades to be adjusted to power limitation positions, an additional device is created and serves as a second emergency device. The method is used for reducing the speed of the wind turbine in the emergency by adjusting the draught-fan blades, wherein as for a wind driven generator, blade pitch control or electric control under the active stall control concept are used; as for the draught-fan blades, the position of each draught-fan blade is fixed through at least one execution driving mechanism and at least one position brake. The method comprises repetitive operation responding to the emergency so that the position brakes can be switched on according to the rotating directions of the required draught-fan blades, the position brakes fix the draught-fan blades and prevent pitching, and when the brakes are switched on, the position brakes are closed or kept closed.

Description

technical field [0001] The invention relates to the field of wind power generators, in particular to a method and device for braking a wind power machine in an emergency. [0002] The invention relates to a hub of a wind power generator and a blade connected with a rotating bearing. Through electric, wind or hydraulic actuators, each blade can be rotated around its own long axis, and stopped at a predetermined position by a brake installed on the actuator. For the actuator, there must be at least one transmission mechanism, which turns on the rotary bearing. The swivel bearing consists of an inner ring and an outer ring, one of which is fixed to the hub with a nut, and the other is fixed to the end of the blade. Rotate the ring that sleeves the paddle so that the paddle rotates around its own long axis. This ring can be the inner ring or the outer ring of the bearing. In order to limit the power generated by the wind in an emergency and reduce the power generation, the bla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/02
CPCY02E10/72
Inventor 弗里茨·法拉
Owner 上海乐普能源科技发展有限公司