CN115929545B - Electromagnetic force auxiliary fan sliding yaw device and method - Google Patents
Electromagnetic force auxiliary fan sliding yaw device and method Download PDFInfo
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- CN115929545B CN115929545B CN202310218570.7A CN202310218570A CN115929545B CN 115929545 B CN115929545 B CN 115929545B CN 202310218570 A CN202310218570 A CN 202310218570A CN 115929545 B CN115929545 B CN 115929545B
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- yaw
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- yawing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention provides a sliding yaw device and a sliding yaw method of an electromagnetic force auxiliary fan, which relate to the technical field of wind power generation equipment and adopt the following scheme: including yaw ring gear and main frame, a plurality of yaw motors are installed to the side of main frame, yaw motor and yaw ring gear transmission are connected, and the one side that is close to yaw ring gear on the main frame is the frame yaw face, and the frame yaw face is provided with the electro-magnet, and the one side that is close to the main frame on the yaw ring gear is the ring gear yaw face, and the ring gear yaw face is provided with the lower electro-magnet that corresponds the arrangement with last electro-magnet, and ring gear yaw face still is provided with piezoelectric sensor and air gap sensor. When in yaw, the upper electromagnet and the lower electromagnet are electrified, and the upper electromagnet and the lower electromagnet are provided with magnetic poles of the same name under the condition of electrifying, so that mutual repulsive force is generated, and the main frame is given an upward reaction force, so that a wire gap is ejected between the yaw gear ring and the main frame by the upward reaction force, or most of pressure between the yaw bearing and the contact surface is counteracted by electromagnetic force. Simple structure, high reliability and low cost.
Description
Technical Field
The invention relates to the technical field of wind power generation equipment, in particular to a sliding yaw device and a sliding yaw method of an electromagnetic force auxiliary fan.
Background
Yaw is an indispensable function in wind power generation sets. Most of the current yaw technical schemes are rolling yaw and sliding yaw. To reduce costs, yaw motors are typically selected from a plurality of smaller torque motors. And a plurality of motors output together during yaw, so that the required torque number of yaw is achieved. With the continuous increase of the power and the blade diameter of the current wind generating set, especially the rapid development of offshore wind power, the size and the weight of a main frame are larger and larger, the required torque output by a yaw motor is larger and larger, and the number of the yaw motors cannot be increased all the time due to the limited space. And even if a technical scheme of selecting a plurality of yaw motors is adopted, the yaw motor has no small cost. Therefore, the huge resistance torque that the fan needs to overcome when yawing is an important factor limiting the cost of the fan.
In this regard, the chinese patent with application number 2017102475494 provides a hybrid suspension air gap adjustment type fan yaw system, on one hand, the scheme adopts a planetary gear structure, which means that only one high-power motor can be provided, the cost is high, and the current commercialized yaw structure uses more low-power motors, because the cost of buying a plurality of low-power motors is lower than that of buying one high-power motor, and meanwhile, the planetary gear also blocks the cable passage and the moving path of personnel; on the other hand, the structure is complex, the magnetic force generated by the permanent magnet is limited, and when the main frame works, the main frame always keeps a suspension state by virtue of the complex structure, an air gap is always reserved between the main frame and a supporting structure of the main frame, and the later failure rate is greatly increased. The above is the current state of the art.
Therefore, developing a sliding yaw device and method for electromagnetic force auxiliary fan is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide and design an electromagnetic force auxiliary fan sliding yaw device and method for solving the problems that in the prior art, huge resistance torque to be overcome when a fan is yawed consumes huge cost, the structure of the existing yaw device is complex, the failure rate is high and the cost is high.
On the one hand, the technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an auxiliary fan slip yaw device of electromagnetic force, includes yaw ring gear and main frame, a plurality of yaw motors (the scheme adopts among the prior art is the planet wheel structure, and this indicates that only a high-power motor, a high-power motor drive planet wheel structure operation, the planet wheel structure is complicated to planet wheel and auxiliary cable have blocked the passageway of passing), yaw motor with yaw ring gear transmission is connected, be close to on the main frame yaw ring gear's one side is the frame yaw face, the frame yaw face is provided with the electro-magnet, yaw ring gear is last be close to the one side of main frame is the ring gear yaw face, the ring gear yaw face be provided with go up the electro-magnet corresponds the lower electro-magnet of arranging, ring gear yaw face still is provided with piezoelectric sensor and air gap sensor. When in yaw, the upper electromagnet and the lower electromagnet are electrified, the same-name magnetic poles are opposite under the electrified condition, mutual repulsive force is generated, and upward reaction force is given to the main frame, wherein the upward reaction force ejects a wire gap between the yaw gear ring and the main frame, or counteracts most of pressure between the yaw gear ring and the main frame through electromagnetic force (in the prior art, the main frame always keeps a suspension state when in operation, an air gap always exists between the main frame and a supporting structure thereof, and the magnetic force generated by a permanent magnet is limited, the later failure rate is greatly increased), so that the resistance of a yaw motor is reduced, the output power of the yaw motor is reduced, and the cost of the yaw motor is reduced. The yaw structure is simpler, the reliability is high, and the corresponding cost can be reduced.
Further, an upper liner is arranged between the yaw surface of the machine frame and the yaw surface of the gear ring. The upper gasket can be a copper gasket and the like, and the friction between the main frame and the yaw gear ring is reduced by placing the upper gasket on the contact surface of the main frame and the yaw gear ring, so that the yaw effect can be achieved under the condition that an air gap cannot be generated between the main frame and the yaw gear ring due to insufficient electromagnetic force cancellation.
Further, the piezoelectric sensors and the air gap sensors are arranged in a plurality, and the piezoelectric sensors and the air gap sensors are distributed on the yaw surface of the gear ring at intervals. Because the pressure of each part is possibly different between the contact surfaces of the main frame and the yaw gear ring, and the magnetic poles are opposite to the area change during yaw, a plurality of piezoelectric sensors and air gap sensors are required to be arranged on the upper surface of the yaw gear ring.
Further, the yaw surface of the machine frame and the yaw surface of the gear ring are respectively provided with a magnet caulking groove, and the upper electromagnet and the lower electromagnet are respectively embedded in the magnet caulking grooves. When the yaw gear is not in a yaw state, the electromagnetic pole is not electrified, the main frame naturally falls on the yaw surface of the gear ring of the yaw gear ring, and the upper electromagnet and the lower electromagnet are embedded in the magnet embedded grooves, so that the influence of exposure on the cooperation of the main frame and the yaw gear ring is avoided.
Further, a brake is fixed on the main frame and matched with the inner side surface of the yaw gear ring, and a side liner is arranged on the surface, matched with the yaw gear ring, of the brake. The main frame is restrained in the horizontal direction by side pads of a brake, the brake is fixed on the main frame, and the side pads on the brake keep certain concentricity and clearance with a yaw gear ring fixed on a tower drum. The side liners are used for ensuring that the main frame does not cross in the horizontal direction.
Further, the upper electromagnet and the lower electromagnet are arranged continuously. Or, the upper electromagnet and the lower electromagnet are provided with a plurality of pieces and are arranged at intervals, a corresponding piezoelectric sensor and an air gap sensor are arranged between every two adjacent lower electromagnets, and each sensor is responsible for controlling two electromagnets adjacent to the sensor.
Further, the upper electromagnet and the lower electromagnet are arranged in a position opposite to each other. Or, the lower electromagnet is arranged in two rows and is respectively positioned at two sides of the upper electromagnet, and the lower electromagnet is arranged in a triangular mode, so that the lower electromagnet is more stable.
On the other hand, the invention also provides a sliding yaw method of the electromagnetic force auxiliary fan, which comprises the sliding yaw device of the electromagnetic force auxiliary fan and further comprises the following steps: when in yaw, the upper electromagnet and the lower electromagnet are electrified, the same-name magnetic poles are generated under the condition of electrifying, mutual repulsive force is generated, and the main frame is given an upward reaction force, and the upward reaction force ejects a wire gap between the yaw gear ring and the main frame or counteracts most of pressure between the yaw gear ring and the main frame through electromagnetic force; when the pressure of the main frame and the yaw gear ring is detected through the piezoelectric sensor while the yaw is assisted by electromagnetism, under the condition of discontinuous arrangement of the upper electromagnet and the lower electromagnet, the upper electromagnet on one side of the main frame and the lower electromagnet on one side of the yaw gear ring are reduced in the yaw process due to staggering, so that the electromagnetic repulsive force applied to the main frame can correspondingly fluctuate, at the moment, if the pressure is detected by the piezoelectric sensor, the repulsive force given by the piezoelectric sensor is smaller, the defect of yaw friction force is counteracted, the current is quickly increased, the larger repulsive force is generated, the pressure between the main frame and the yaw gear ring is quickly counteracted, in the process, if the pressure between the main frame and the yaw gear ring is detected to be smaller, the increasing speed of the current is reduced, the repulsive force between the main frame and the yaw gear ring is slowly increased, and the current intensity is not increased until the pressure sensor detects that the pressure is nearly 0. When the yaw state is not realized, the upper electromagnet and the lower electromagnet are not electrified, and the main frame naturally falls on the yaw gear ring.
From the above technical scheme, the invention has the following advantages:
the scheme provides an electromagnetic force auxiliary fan sliding yaw device and method, during yaw, an electromagnet is electrified to generate magnetic force within a contact surface of a main frame and a yaw gear ring, and a wire gap is ejected between the yaw gear ring and the main frame by electromagnetic force or pressure between most of the yaw gear ring and the main frame is counteracted by electromagnetic force, so that resistance to a yaw motor during yaw is reduced. Furthermore, in the aspect of motor type selection, output parameters such as yaw motor power and torque can be reduced, and further cost reduction is realized in the aspect of yaw motor type selection.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram showing a facing positional relationship between an upper electromagnet and a lower electromagnet according to an embodiment of the present invention.
Fig. 3 is a schematic diagram showing the triangular positional relationship between the upper electromagnet and the lower electromagnet according to the embodiment of the present invention.
Fig. 4 is a schematic structural view showing a continuous arrangement manner of electromagnets according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of an embodiment of the present invention showing a spaced arrangement of electromagnets.
Fig. 6 is a schematic structural diagram of a piezoelectric sensor arrangement in accordance with an embodiment of the present invention.
Fig. 7 is a logic diagram of electromagnet current variation in an embodiment of the present invention.
FIG. 8 is a graph of current versus detected pressure in an embodiment of the invention.
Fig. 9 is a schematic diagram of the electrical principle of an embodiment of the present invention.
Fig. 10 is a schematic diagram showing a construction of an ampere force lifting mode in embodiment 3 of the present invention.
Fig. 11 is a schematic structural view of the whole embodiment of the present invention.
In the figure, 1, a yaw gear ring, 2, a main frame, 3, a yaw motor, 4, a lower electromagnet, 5, an upper electromagnet, 6, an upper gasket, 7, a lower gasket, 8, a side gasket, 9, a brake, 10, a piezoelectric sensor, 11, an air gap sensor, 12, a wire, 13, a hydraulic brake, 14, a mechanical brake, 15, a gearbox, 16 and a tower.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.
Example 1
As shown in fig. 1 to 9 and 11, this embodiment provides an electromagnetic force auxiliary fan sliding yaw device, including yaw ring gear 1 and main frame 2, the lower part of yaw ring gear 1 is connected with tower section of thick bamboo 16, the inboard of yaw ring gear 1 is provided with mechanical brake 14, a plurality of yaw motors 3 are installed to the side of main frame 2, yaw motor 3 is connected with yaw ring gear 1 transmission through gearbox 15, the one side that is close to yaw ring gear 1 on the main frame 2 is the frame yaw face, the frame yaw face is provided with electromagnet 5, the one side that is close to main frame 2 on yaw ring gear 1 is the ring gear yaw face, the ring gear yaw face is provided with lower electromagnet 4 that corresponds with last electromagnet 5 and arranges. The gear ring yaw surface is also provided with a piezoelectric sensor 10 and an air gap sensor 11, the piezoelectric sensor 10 and the air gap sensor 11 are arranged in a plurality, the piezoelectric sensors 10 and the air gap sensor 11 are arranged on the gear ring yaw surface at intervals, and because the pressure of the contact surface of the main frame 2 and the yaw gear ring 1 is different from each other, and the magnetic poles are opposite to the reason such as area change during yaw, the piezoelectric sensors 10 and the air gap sensor 11 are required to be arranged on the upper surface of the yaw gear ring 1.
Wherein, frame yaw face and ring gear yaw face all are provided with magnet caulking groove, go up electro-magnet 5 and down electro-magnet 4 and all inlay in the magnet caulking groove. Because the electromagnetic pole is not electrified in the non-yaw state, the main frame 2 naturally falls on the gear ring yaw surface of the yaw gear ring 1, and the upper electromagnet 5 and the lower electromagnet 4 are embedded in the magnet embedded grooves, so that the influence of the exposure on the cooperation of the main frame 2 and the yaw gear ring 1 is avoided. Specifically, for the arrangement mode of the magnets, in some schemes, referring to fig. 4, the upper electromagnet 5 and the lower electromagnet 4 are arranged continuously; in other schemes, referring to fig. 5, the upper electromagnet 5 and the lower electromagnet 4 are provided with a plurality of pieces and are arranged at intervals, a corresponding piezoelectric sensor 10 and an air gap sensor 11 are arranged between every two adjacent lower electromagnets 4, and each sensor is responsible for controlling two electromagnets adjacent to the sensor. In addition, as shown in fig. 2, the upper electromagnet 5 is arranged opposite to the lower electromagnet 4; or, as shown in fig. 3, the lower electromagnet 4 is arranged in two rows and is respectively positioned at two sides of the upper electromagnet 5, and is arranged in a triangular mode, so that the device is more stable.
Example 2
The embodiment provides a yaw initiative step-down scheme on the basis of embodiment 1, specifically, see fig. 1, be provided with upper liner 6 between frame yaw surface and the ring gear yaw surface, upper liner 6 can be copper pad etc. through placing upper liner 6 at the contact surface of main frame 2 and yaw ring gear 1, reduce the friction between main frame 2 and yaw ring gear 1, when electromagnetic force offset not enough, under the condition that can't produce the air gap between main frame 2 and yaw ring gear 1, offset the pressure of a part of main frame 2 to yaw ring gear 1 through electromagnetic force, also can reach the effect of driftage. The main frame 2 is fixedly provided with a brake 9, the brake 9 is matched with the inner side surface of the yaw gear ring 1, a side liner 8 is arranged on the surface, matched with the yaw gear ring 1, of the brake 9, the position of the main frame 2 in the horizontal direction is restrained by the side liner 8 of the brake 9, the brake 9 is fixedly arranged on the main frame 2, the side liner 8 on the brake 9 keeps a certain concentricity and a certain gap with the yaw gear ring 1 fixedly arranged on a tower, and the side liner 8 is used for ensuring that the main frame 2 does not randomly blow by in the horizontal direction.
Example 3
The embodiment provides a sliding yaw method of an electromagnetic force auxiliary fan, which comprises the electromagnetic force auxiliary fan sliding yaw device in embodiment 1, and further comprises the following steps: when in yaw, the upper electromagnet 5 and the lower electromagnet 4 are electrified, the same-name magnetic poles are generated under the condition of electrifying, mutual repulsive force is generated, and upward reaction force is given to the main frame 2, and the upward reaction force ejects a wire gap between the yaw gear ring 1 and the main frame 2 or counteracts most of pressure between the yaw gear ring 1 and the main frame 2 through electromagnetic force; when the pressure between the main frame 2 and the yaw gear ring 1 is detected through the piezoelectric sensor 10 while the yaw is assisted, under the condition of discontinuous arrangement of the upper electromagnet 5 and the lower electromagnet 4, the opposite area is reduced due to staggering of the upper electromagnet 5 on one side of the main frame 2 and the lower electromagnet 4 on one side of the yaw gear ring 1 in the yaw process, so that the electromagnetic repulsive force born by the main frame 2 can correspondingly fluctuate, at the moment, if the pressure detected by the piezoelectric sensor 10 is larger, the repulsive force given by the piezoelectric sensor is smaller, the insufficient yaw friction force is counteracted, the current is quickly increased, the larger repulsive force is generated, the pressure between the main frame 2 and the yaw gear ring 1 is quickly counteracted, in the process, if the pressure between the main frame 2 and the yaw gear ring 1 is detected to be smaller, the current increasing speed is reduced, the repulsive force between the main frame 2 and the yaw gear ring 1 is slowly increased, and the current intensity is not increased any more until the pressure sensor detects that the pressure is nearly 0. In the non-yaw state, the upper electromagnet 5 and the lower electromagnet 4 are not electrified, and the main frame 2 naturally falls on the yaw gear ring 1.
Example 4
As shown in fig. 10, this embodiment provides a yaw method different from embodiment 1, specifically: the wires 12 are buried right above the main frame 2, and the wires 12 are electrified in yaw so that the wires 12 are subjected to upward ampere force in a magnetic field to lift the main frame 2. The structure is shown in fig. 9. If the N pole of the magnetic pole points to the outer side, anticlockwise current is conducted when the N pole of the magnetic pole is seen from top to bottom; if the N pole is directed to the inner side, a clockwise current is conducted from the top down.
The terms "upper," "lower," "outboard," "inboard," and the like in the description and in the claims of the invention and in the above figures, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides an auxiliary fan slip yaw device of electromagnetic force, includes yaw ring gear (1) and main frame (2), a plurality of yaw motors (3) are installed to the side of main frame (2), yaw motor (3) with yaw ring gear (1) transmission is connected, a serial communication port, be close to on main frame (2) the one side of yaw ring gear (1) is frame yaw face, frame yaw face is provided with electro-magnet (5), be close to on yaw ring gear (1) the one side of main frame (2) is the ring gear yaw face, the ring gear yaw face be provided with lower electro-magnet (4) that go up electro-magnet (5) and correspond to arrange, the ring gear yaw face still is provided with piezoelectric sensor (10) and air gap sensor (11).
2. An electromagnetic force assisted blower sliding yawing apparatus as claimed in claim 1, wherein an upper liner (6) is provided between said frame yawing surface and said ring gear yawing surface.
3. An electromagnetic force assisted blower sliding yaw apparatus as claimed in claim 1, wherein a plurality of piezoelectric sensors (10) and air gap sensors (11) are provided, the plurality of piezoelectric sensors (10) and air gap sensors (11) being arranged at intervals on the ring gear yaw plane.
4. An electromagnetic force assisted blower sliding yawing device according to claim 1, wherein the frame yawing surface and the ring gear yawing surface are provided with magnet slots, and wherein the upper electromagnet (5) and the lower electromagnet (4) are embedded in the magnet slots.
5. An electromagnetic force assisted wind turbine sliding yaw apparatus as claimed in claim 2, wherein a brake (9) is fixed on the main frame (2), the brake (9) is matched with the inner side surface of the yaw gear ring (1), and a side liner (8) is mounted on the surface of the brake (9) matched with the yaw gear ring (1).
6. An electromagnetic force assisted wind turbine sliding yawing apparatus as claimed in any one of claims 1-5, wherein said upper electromagnet (5) and said lower electromagnet (4) are each arranged in a continuous manner.
7. An electromagnetic force assisted fan sliding yaw apparatus as claimed in any one of claims 1 to 5, wherein the upper electromagnet (5) and the lower electromagnet (4) are provided with a plurality of pieces and are arranged at intervals, and a corresponding piezoelectric sensor (10) and an air gap sensor (11) are arranged between each two adjacent lower electromagnets (4).
8. An electromagnetic force assisted wind turbine sliding yawing apparatus as claimed in any one of claims 1-5, wherein said upper electromagnet (5) is positioned directly opposite said lower electromagnet (4).
9. An electromagnetic force assisted wind turbine sliding yawing apparatus as claimed in any one of claims 1-5, wherein said lower electromagnet (4) is arranged in two rows, one on each side of said upper electromagnet (5).
10. A method of electromagnetic force assisted blower sliding yaw comprising the electromagnetic force assisted blower sliding yaw apparatus of claim 7, further comprising the steps of: when in yaw, the upper electromagnet (5) and the lower electromagnet (4) are electrified, the same-name magnetic poles are generated under the condition of electrifying, mutual repulsive force is generated, and the main frame (2) is given an upward reaction force, and the upward reaction force ejects a wire gap between the yaw gear ring (1) and the main frame (2) or counteracts partial pressure between the yaw gear ring (1) and the main frame (2) through electromagnetic force; when the yawing is electromagnetically assisted, the pressure between the main frame (2) and the yawing gear ring (1) is detected through the piezoelectric sensor (10), under the condition of discontinuous arrangement of the upper electromagnet (5) and the lower electromagnet (4), the upper electromagnet (5) on one side of the main frame (2) and the lower electromagnet (4) on one side of the yawing gear ring (1) can be reduced due to the staggering in the yawing process, so that the electromagnetic repulsive force of the main frame (2) can correspondingly fluctuate, and at the moment, if the pressure detected by the piezoelectric sensor (10) is high, the repulsive force given by the piezoelectric sensor is small, the insufficient yawing friction force is counteracted, the current is quickly increased, so that repulsive force is generated, the pressure between the main frame (2) and the yawing gear ring (1) is quickly counteracted, and in the process, if the pressure between the main frame (2) and the yawing gear ring (1) is detected to be reduced, the current increasing speed is reduced, the repulsive force between the main frame (2) and the yawing gear ring (1) is increased until the pressure detected by the pressure sensor to be nearly 0;
when the yaw gear is not in a yaw state, the upper electromagnet (5) and the lower electromagnet (4) are not electrified, and the main frame (2) naturally falls on the yaw gear ring (1).
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| CN102865197A (en) * | 2012-09-21 | 2013-01-09 | 东北电力大学 | Straight wind driven generator |
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| US5035575A (en) * | 1988-02-01 | 1991-07-30 | I.K. Trading Aps. | Yawing system for a wind mill |
| JP4502627B2 (en) * | 2003-09-19 | 2010-07-14 | ナブテスコ株式会社 | Wind generator yaw drive |
| KR100920303B1 (en) * | 2007-12-11 | 2009-10-08 | 주식회사 효성 | yaw system of wind power plant |
| WO2011096078A1 (en) * | 2010-02-08 | 2011-08-11 | 三菱重工業株式会社 | Wind driven generator and method of rotating nacelle |
| DK2402597T3 (en) * | 2010-06-29 | 2016-11-28 | Siemens Ag | The wind turbine yaw system and method for controlling thereof |
| CN206522216U (en) * | 2017-02-27 | 2017-09-26 | 曲阜师范大学 | Empennage adjusting type magnetic suspension wind yaw device |
| CN110425082A (en) * | 2019-08-06 | 2019-11-08 | 国电联合动力技术有限公司 | A kind of generating set yaw system and method and yaw driving method |
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| CN102865197A (en) * | 2012-09-21 | 2013-01-09 | 东北电力大学 | Straight wind driven generator |
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