127 results about "Yaw drive" patented technology

A floating wind turbine system with a tower structure that includes at least one stability arm extending therefrom and that is anchored to the sea floor with a rotatable position retention device that facilitates deep water installations. Variable buoyancy for the wind turbine system is provided by buoyancy chambers that are integral to the tower itself as well as the stability arm. Pumps are included for adjusting the buoyancy as an aid in system transport, installation, repair and removal. The wind turbine rotor is located downwind of the tower structure to allow the wind turbine to follow the wind direction without an active yaw drive system. The support tower and stability arm structure is designed to balance tension in the tether with buoyancy, gravity and wind forces in such a way that the top of the support tower leans downwind, providing a large clearance between the support tower and the rotor blade tips. This large clearance facilitates the use of articulated rotor hubs to reduced damaging structural dynamic loads. Major components of the turbine can be assembled at the shore and transported to an offshore installation site.

A floating wind turbine system with a tower structure that includes at least one stability arm extending therefrom and that is anchored to the sea floor with a rotatable position retention device that facilitates deep water installations. Variable buoyancy for the wind turbine system is provided by buoyancy chambers that are integral to the tower itself as well as the stability arm. Pumps are included for adjusting the buoyancy as an aid in system transport, installation, repair and removal. The wind turbine rotor is located downwind of the tower structure to allow the wind turbine to follow the wind direction without an active yaw drive system. The support tower and stability arm structure is designed to balance tension in the tether with buoyancy, gravity and wind forces in such a way that the top of the support tower leans downwind, providing a large clearance between the support tower and the rotor blade tips. This large clearance facilitates the use of articulated rotor hubs to reduced damaging structural dynamic loads. Major components of the turbine can be assembled at the shore and transported to an offshore installation site.

A method and system for improving power production efficiency on a wind farm having of a plurality of spatially distributed wind turbines is provided. The method includes receiving a wind measurement that includes a wind direction impinging on a turbine (20), determining a misalignment of the wind turbine with respect to the wind direction, and activating a wake steering control for the wind turbine (20) to implement the misalignment of the wind turbine (20) with the wind direction such that the misalignment is adapted to steer a wake of the wind turbine away from a neighboring wind turbine (30). A wind turbine arrangement including a nacelle, a yaw controller, and a yaw drive is also provided.

A speed reducer and a yaw drive apparatus for a wind power generation apparatus, where the speed reducer has high efficiency and a short axial length, and suitable for the yaw drive apparatus. The speed reducer has three stages for speed reduction. The total reduction gear ratio of a first stage speed reducing portion 10 and a second speed reducing portion 20 is set to 1 / 6 to 1 / 60, and a third stage speed reducing portion 30 is constructed from an eccentric oscillating-type speed reduction mechanism having an internal gear member 32, external gears 34, crankshafts 35, and a carrier 37. The reduction gear ratio of the eccentric oscillating-type speed reduction mechanism is set to 1 / 50 to 1 / 140, and the total reduction gear ratio of the speed reducer is set to 1 / 1000 to 1 / 3000. A yaw drive method and the yaw drive apparatus can reduce noise, and the yaw drive apparatus is inexpensive and reduced in size.

A lens driving device includes a lens, a moving member that supports the lens, a stationary member that movably supports the moving member, a pitch drive mechanism that drives the moving member in the pitch correction direction, and a yaw drive mechanism that drives in the yaw correction direction. The pitch drive mechanism has first and second magnets provided to the stationary member, and first and second coils provided to the moving member. The yaw drive mechanism has a third magnet provided to the stationary member, and a third coil provided to the moving member. The first and second coils are arranged on opposite sides of the lens when viewed in a third direction that is perpendicular to the pitch and yaw correction directions, and the third coil is arranged on the same side as the first coil with respect to the lens when viewed in the third direction.

A method for removing and replacing an article of wind turbine equipment, such as a yaw drive, internal to a nacelle of a wind turbine tower without use of an external windfarm site crane or external rigging on the wind tower. External rigging of wind turbine tower components may expose workers and the equipment inside the nacelle to outside weather and hazardous wind conditions. The yaw drive is internally rigged with an internal support crane within the nacelle to an internal winch capable of supporting the yaw drive during a lift to the base of the wind turbine tower.

A speed reducer and a yaw drive apparatus for a wind power generation apparatus, where the speed reducer has high efficiency and a short axial length, and suitable for the yaw drive apparatus. The speed reducer has three stages for speed reduction. The total reduction gear ratio of a first stage speed reducing portion (10) and a second stage speed reducing portion (20) is set at 1 / 6 to 1 / 60, and a third stage speed reducing portion (30) is constructed from an eccentric oscillating-type speed reducing mechanism having an internal-geared gear body (32), external gears (34), crankshafts (35), and a carrier (37). The reduction gear ratio of the eccentric oscillating-type speed reducing mechanism is set at 1 / 50 to 1 / 140, and the total reduction gear ratio of the speed reducer is set at 1 / 1000 to 1 / 3000. A yaw drive method and the yaw drive apparatus can reduce noise, and the yaw drive apparatus is inexpensive and reduced in size.

It is an object to make it possible to completely or partially eliminate a yaw driving device and to reduce power consumption in a nacelle. A moment around a wind-turbine tower axis is calculated; an angle command value around the wind-turbine tower axis is calculated by adding a yaw-control command value to a reference command value for canceling out the moment; and a pitch angle command value of each wind turbine blade is set on the basis of the angle command value around the wind-turbine tower axis.

A yaw assembly for use in a wind turbine. The yaw assembly includes a shaft coupled to a yaw drive assembly. The shaft extends outwardly from said yaw drive assembly. A pinion is operatively coupled to the shaft. A slip assembly is positioned between the pinion and the shaft. The slip assembly is configured to facilitate selectively rotating the pinion with respect to the shaft.

A wind turbine generator is provided in which a gear having a large diameter is not required in a yaw drive device (30) of a yaw system (10A). The yaw drive device (30) of the yaw system (10A), which revolves a nacelle (3) depending on the wind direction, includes a electric motor (31) which is fixedly provided on a nacelle base plate (12), with an output shaft (31a) substantially aligned with a pivot of the nacelle (3). The output shaft (31a) and a fixed-side support member (2b) provided in the vicinity of an upper end of the tower (2) are coupled by a coupling shaft (33) having couplings (32) provided at both ends thereof.

The invention relates to a yaw system of a wind generating set and the wind generating set comprising the system. The yaw system comprises a yaw cylinder section, a yaw drive, a yaw bearing, a yaw braking disc and a yaw brake, wherein the yaw cylinder section is arranged between a tower cylinder and a main machine frame of the wind generating set; the outer ring of the yaw bearing is fixed at the bottom of the yaw cylinder section; the inner ring of the yaw bearing is fixed together with the yaw brake disc and the tower cylinder; a gear hole is formed in a lower flange of the yaw cylinder section; the yaw drive is mounted in the yaw cylinder section and mounted on the lower flange of the yaw cylinder section; a yaw pinion penetrates the gear hole of the lower flange of the yaw cylinder section and is meshed with a gear ring of the inner ring of the yaw bearing. The yaw system adopts an inner meshed yaw mode and the yaw drive is separated from the main machine frame, so that a cabin and the tower cylinder are not oversized, and the problem that the generating set is difficult to transport and mount is solved. The yaw system can be widely applied to wind generating sets with the grade higher than 10 MW.

A wind-driven generator whose yaw system (10A) installed at the upper part of a support (2) is reduced in the number of its components and weight. The wind-driven generator has the yaw system (10A) equipped with a yaw driving device (30), a yaw slewing ring, and a yaw brake and slewing a nacelle installed at the upper part of the support (2) according to the direction of the wind. A yaw slewing ring fixed to a nacelle table plate (12) through a bracket (23A) having a nearly L-shaped cross section functions as the slide bearing (20A). Thus, the slide bearing (20A) slidably supports a flange part (2a) formed at the upper end of the support (2) with slide pads (22) held by the bracket (23A).

A yaw drive assembly for a rotatable system includes an input shaft configured to receive a torque from a yaw drive motor coupled within a body of the rotatable system, wherein the torque facilitates rotating the rotatable system about a yaw axis. The yaw drive assembly includes at least two output shafts configured to receive the torque and transmit a rotational yaw force to the rotatable system, and a differential gear stage operatively coupled to the two output shafts, wherein the differential gear stage includes a differential planetary gear configured to drive a pinion coupled to each of the two output shafts.

A method of adjusting a yaw angle of a wind turbine. The wind turbine includes a nacelle that is rotatably coupled to a tower. The method includes coupling a yaw drive assembly to the nacelle for adjusting an orientation of the nacelle with respect to a direction of wind. A first sensor that is coupled to the wind turbine transmits at least a first monitoring signal that is indicative of an operating condition of the wind turbine to a control system. A yaw angle of the nacelle with respect to the direction of wind is calculated by the control system based at least in part on the first monitoring signal. The yaw drives assembly is operated to adjust a yaw of the nacelle based at least in part on the calculated yaw angle.

The invention discloses a wind power generator comprising a tower, a first wind wheel, a cabin, a first wheel hub, a first main shaft, a first generator set and a yaw driving system, wherein the first wind wheel comprises a plurality of vanes, the cabin is installed on the tower, the first wheel hub is used for installing the first wind wheel, the first main shaft extends out of one end of the cabin, the first generator set is arranged in the cabin, and the yaw driving system is arranged at the lower end of the cabin; and one end of the first main shaft is connected with the first wheel hub, and the other end of the first main shaft is connected with the first generator set through a first drive system. The wind power generator also comprises a first wind wheel, a second wheel hub, a second main shaft and a second generator set, wherein the first wind wheel comprises a plurality of vanes, the second wheel hub is used for installing the second wind wheel, the second main shaft extends out of the other end of the cabin, and the second generator set is arranged in the cabin; and one end of the second main shaft is connected with the second wheel hub, and the other end of the second main shaft is connected with the second generator set through a second drive system. The wind power generator has low cost and can effectively improve the utilization rate of wind energy.

A yaw drive method of a wind power generation apparatus, in which a second gear engaged with a first gear attached to one of tower or a wind power generation unit supported to the upper end of the tower so as to be capable of yawing and supported to a tower or to the upper end of the tower is rotated by a drive motor attached to the other of the tower or the wind power generation unit for yawing the wind power generation unit. A drive energy, which is supplied to the drive motor for a predetermined time from when the supply of the drive energy to the drive motor begins to start, is made to be smaller than the drive energy supplied to the drive motor in a common yawing.

The invention provides a twelve-degree-of-freedom space simulator butt-joint performance testing device. The device includes a two-dimensional horizontal movement driving unit, an active yawing driving unit, a passive yawning driving unit, an active space simulator body and a passive space simulator body; the active and passive yawing driving units are arranged at the two ends of the two-dimensional horizontal movement driving unit respectively, the active space simulator body is arranged on the active yawing driving unit, and the passive space simulator body is arranged on the passive yawingdriving unit; the active yawing driving unit drives the active space simulator body to simulate an active end of a butt-joint mechanism; the passive yawning driving unit and the passive space simulator body simulate a passive end of the butt-joint mechanism. Movement coupling among the degrees of freedom of the space simulator is small, the implementation of each degree of freedom is sensitive andreliable, the movement range is wide, the movement track is not limited, and by adopting an air flotation technique, the simulation precision is high.

A yaw-drive system for a wind turbine housed in a movable-in-yaw nacelle affixed atop a tower on a roller bearing. A round-look high-flux core material forms the stator of a circular linear yaw motor. The stator is affixed to the tower and is stationary. A plurality of magnets is affixed to the nacelle in proximity with the core material, such that as the stator is excited in quadrature the nacelle rotates on the roller bearings about a yaw pivot.

The invention discloses a yaw driving device of a wind driven generator, relates to the technical field of wind power generating equipment, and solves the defects of complex driving mechanism and low reliability of the existing yaw driving devices of wind driven generators, reduced braking reliability of yaw braking devices, big yaw driving resistance and high cost. A driving gear arranged on a direct drive electrohydraulic servo low-speed and large-torque hydraulic motor output shaft is directly engaged with a yaw fluted disc; a locking part of a yaw braking device is directly arranged on the direct drive electrohydraulic servo low-speed and high-torque hydraulic motor output shaft; a variable-frequency motor of the direct drive electrohydraulic servo low-speed and high-torque hydraulic motor is connected with a two-way constant displacement pump, the two-way constant displacement pump is connected with the low-speed and large-torque hydraulic motor by a hydraulic lock, and an oil feeding valve is connected to two oil channels between the two-way constant displacement pump and the low-speed and large-torque hydraulic motor. The yaw driving device has the advantages of good reliability, simple structure, low cost, stepless regulation of yawing velocity and the like.

A yaw drive system for a wind energy system includes a hydraulic yaw motor for adjusting the yaw angle of a nacelle of a wind energy system, at least one hydraulic pump adapted for providing a pressurized hydraulic fluid, a hydraulic line system, including at least one line connecting the at least one hydraulic pump and the at least one hydraulic yaw motor, and at least one overpressure valve. The at least one overpressure valve is connected to at least one flow path of the hydraulic fluid between the at least one hydraulic pump and the at least one hydraulic motor. Further, a method for changing a yaw angle of a wind turbine nacelle is provided.

A yaw sensor for a wind turbine comprises a plurality of rotary switches, each configured to be coupled to a yaw drive gearbox of a wind turbine nacelle, the rotary switches each being operable to activate and deactivate respective associated electrical contacts in dependence on an amount of yaw rotation of the nacelle relative to a start position.Each electrical contact is active at a plurality of first yaw rotation ranges with respect to the start position, and inactive at a plurality of second yaw rotation ranges with respect to the start position, the first and second yaw rotation ranges being interleaved.

A yaw drive assembly for a rotatable system includes an input shaft configured to receive a torque from a yaw drive motor coupled within a body of the rotatable system, wherein the torque facilitates rotating the rotatable system about a yaw axis. The yaw drive assembly includes at least two output shafts configured to receive the torque and transmit a rotational yaw force to the rotatable system, and a differential gear stage operatively coupled to the two output shafts, wherein the differential gear stage includes a differential planetary gear configured to drive a pinion coupled to each of the two output shafts.

A yaw drive assembly for a wind turbine has a releasable and re-engageable coupling operably configured between a drive gear that engages with a yaw bearing and the output of a gear assembly that is coupled to a drive motor. The coupling maintains a rotational drive engagement between the gear assembly output and drive gear up to a defined rotational torque, wherein the coupling disengages the gear assembly output from the drive gear. The coupling re-engages the gear assembly output to the drive gear upon the rotational torque decreasing to below the defined rotational torque.

A wind turbine generator is provided in which a gear having a large diameter is not required in a yaw drive device (30) of a yaw system (10A). The yaw drive device (30) of the yaw system (10A), which revolves a nacelle (3) depending on the wind direction, includes a electric motor (31) which is fixedly provided on a nacelle base plate (12), with an output shaft (31a) substantially aligned with a pivot of the nacelle (3). The output shaft (31a) and a fixed-side support member (2b) provided in the vicinity of an upper end of the tower (2) are coupled by a coupling shaft (33) having couplings (32) provided at both ends thereof.

Provided are a yaw control system and a yaw control method for a wind turbine generator, which are capable of obtaining an accurate value of the yaw direction even when the yaw direction sensor is abnormal. A yaw control system for a wind turbine generator which includes a nacelle configured to be capable of yaw rotation by a yaw drive mechanism comprises: a yaw direction sensor for detecting a yaw direction value of the nacelle at a current time; a yaw rotation amount calculation part for calculating an amount of yaw rotation of the nacelle in a predetermined period of time based on a yaw rotation speed and a yaw rotation time of the nacelle; a yaw direction estimation part configured to calculate an estimate value of a yaw direction of the nacelle at an end point of the predetermined period by an estimate value calculation logic, based on the amount of yaw rotation in the predetermined period calculated by the yaw rotation amount calculation part and the yaw direction value at a starting point of the predetermined period, and a yaw drive control part for controlling the yaw drive mechanism, wherein the yaw drive control part is configured to: when the yaw direction sensor is normal, determine a yaw rotation direction of the nacelle based on a detected result of the yaw direction value detected by the yaw direction sensor; and when the yaw direction sensor is abnormal, determine the yaw rotation direction of the nacelle based on the estimate value calculated by the yaw direction estimation part.

A yaw system of a wind turbine having contingency autonomous control capabilities includes a plurality of yaw system components configured to change an angle of a nacelle of the wind turbine relative to an incoming wind direction. The plurality of yaw system components includes an auxiliary power supply comprising a brake power control device, a braking unit coupled to the brake power control device, at least two energy storage devices coupled to the braking unit, a plurality of yaw drive mechanisms communicatively coupled to the auxiliary power supply via a communication link, and a controller configured to implement a protective control strategy for the yaw system in response to one of the yaw system components experiencing a failure. Each of the yaw drive mechanisms includes a yaw power control device.

The invention discloses a system and a method for calculating driving torque of a wind driven generator yaw system. The method comprises the steps of modeling with finite element software as a platform and performing solid grid division on a rack bottom plate, a transverse suspending rod, a yaw gear ring, an upper friction plate, a lower friction plate and an adjusting bolt; simulating a disc spring component by a one-way pressed spring unit, wherein one end of the disc spring component is connected with the lower friction plate and the other end of the disc spring component is connected with the adjusting bolt; establishing a node in the center of a tower top flange support surface and connecting the node to the rack bottom plate through a rigid beam unit, wherein the node is used for exerting tower top limit load; defining the material attributes of all the components, wherein the non-linear rigidity of the disc spring component is defined according to tested data of a test; defining constrained boundary conditions and exerting clamping force of the upper friction plate and the lower friction plate as well as outer load; exerting a tiny angular displacement on the node to solve the yaw driving torque. The method can be used for accurately calculating the yaw driving torque, facilitates power optimization selection of a driving motor, is beneficial to cost reduction and suitable for popularization in a wide range.