CN117469086B - Variable frequency yaw actuating mechanism of wind power generation fan - Google Patents
Variable frequency yaw actuating mechanism of wind power generation fan Download PDFInfo
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- CN117469086B CN117469086B CN202311694934.5A CN202311694934A CN117469086B CN 117469086 B CN117469086 B CN 117469086B CN 202311694934 A CN202311694934 A CN 202311694934A CN 117469086 B CN117469086 B CN 117469086B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 238000010248 power generation Methods 0.000 title claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 29
- 239000010687 lubricating oil Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 19
- 239000004519 grease Substances 0.000 claims description 17
- 210000003813 thumb Anatomy 0.000 claims description 3
- 238000005461 lubrication Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 240000007643 Phytolacca americana Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/329—Azimuth or yaw angle
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a variable frequency yaw actuating mechanism of a wind power generation fan, which comprises a motor bracket, a yaw annular gear and a yaw gear, wherein the yaw annular gear and the yaw gear are meshed, the yaw gear is connected with the output end of a yaw motor, the motor bracket and the yaw annular gear are coaxially arranged, the yaw motor is in sliding connection with the motor bracket, distance measuring pieces are respectively arranged on two sides of a sliding block, the distance between the sliding blocks where the yaw motor is positioned in a normal working state is kept equal, an eccentric bracket is arranged on an output shaft of the yaw motor for eccentric movement of the yaw gear, and when the yaw motor fails, the variable frequency yaw actuating mechanism of the wind power generation fan can disconnect the yaw gear corresponding to the failed yaw motor from the yaw annular gear, and simultaneously, the yaw motor in the normal working state can be uniformly distributed again, and uniform driving force is given to the yaw annular gear.
Description
Technical Field
The invention relates to the technical field of wind power generation equipment, in particular to a variable frequency yaw actuating mechanism of a wind power generation fan.
Background
The yaw system is a control system specific to the wind power generator set. For the horizontal axis wind generating set, in order to achieve the best wind energy utilization efficiency, the impeller needs to track the wind direction with stable change, and the yaw system device is used for achieving wind alignment of the impeller.
The actuating mechanism of the yaw system device generally comprises a yaw driving motor, a plurality of yaw planet gears, a revolving body large gear, a yaw brake and the like, and the yaw driving motor drives the yaw planet gears to drive the revolving body large gear to rotate so as to drive a top box of the wind generating set to rotate, so that the wind of a top box impeller of the wind generating set is realized.
The wind generating set works outdoors, is influenced by various factors such as strong wind, difficult maintenance and the like, and has the problems of yaw tooth striking between a yaw planet gear and a revolving body large gear, so that the yaw planet gear and the loaded rotor are uneven, and a yaw driving motor is damaged and the like. When one yaw drive motor works abnormally, the loads of other yaw drive motors and yaw planet gears become large and are not loaded uniformly, and therefore the undamaged yaw drive motor is easy to fail.
Disclosure of Invention
The invention aims to solve the problem that load distribution of other yaw drive motors is uneven after a yaw drive motor of a wind generating set fails in the prior art, and provides a variable frequency yaw actuating mechanism of a wind generating fan.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A variable frequency yaw actuator of a wind power generation fan comprises at least one yaw annular gear and at least one yaw gear, wherein the yaw gear is meshed with the yaw annular gear and is generally configured into a plurality of yaw gears and the yaw annular gear. The yaw inner gear ring is fixedly connected with a top box, fan blades are arranged on the top box, the yaw gear is connected with the output end of the yaw motor, and the yaw gear and the yaw motor are connected to the tower. The yaw motor drives the yaw gear to rotate, and the yaw gear drives the yaw inner gear ring to rotate, so that steering yaw of the top box is realized.
The variable frequency yaw actuating mechanism of the wind power generation fan further comprises an annular motor bracket fixedly connected to the tower, and the motor bracket and the yaw inner gear ring are coaxially arranged. The motor support is provided with an annular chute and a slide block matched with the annular chute, a yaw motor is fixedly installed on the slide block, distance measuring pieces for measuring the distance between the adjacent yaw motors in a normal working state are respectively arranged on two sides of the slide block, and the distance between the yaw motors in the normal working state is kept equal.
The output shaft of the yaw motor comprises a fixed section positioned on the upper part and a movable section positioned on the lower part, wherein an eccentric bracket is fixedly arranged at the lower end of the fixed section, an eccentric movable block which is in sliding connection with the eccentric bracket is arranged at the bottom of the eccentric bracket, the lower part of the eccentric movable block is rotationally connected with the movable section, the lower end of the movable section is fixedly connected with a yaw gear, and a combining piece for limiting rotation between the eccentric movable block and the movable section is arranged between the eccentric movable block and the movable section.
When the yaw motor is in a normal working state, the movable section and the fixed section of the yaw motor are in a coaxial state, and the yaw gear is meshed with the yaw inner gear ring; when the yaw motor is in a failure state, the movable section and the fixed section of the yaw motor are in different axial states, and the yaw gear is not meshed with the yaw inner gear ring.
Preferably, the variable frequency yaw actuating mechanism of the wind power generation fan further comprises a combined sealing ring which is positioned at the inner edge of the yaw inner gear ring, the tooth part of the yaw inner gear ring is provided with an inner annular groove, the tooth part of the yaw gear wheel is provided with an outer annular groove corresponding to the inner annular groove, the combined sealing ring seals the engagement part of the inner annular groove, the yaw inner gear ring and the yaw gear wheel, and a lubricating oil duct is formed between the combined sealing ring and the inner annular groove.
The combined sealing ring comprises a gear wrapping block and a spacing block. The gear wrapping block is used for sealing the meshing position of the yaw annular gear and the yaw gear and the inner annular groove, and the central angle corresponding to the gear wrapping block is 60 degrees; the spacing blocks are positioned between the yaw gears and only seal the inner ring grooves, and the central angle corresponding to the spacing blocks is 30 degrees.
Preferably, the variable frequency yaw actuating mechanism of the wind power generation fan further comprises a lubricating oil pipe fixedly connected to the gear wrapping block, the lower portion of the lubricating oil pipe is communicated with the lubricating oil duct, the upper portion of the lubricating oil pipe is connected with a three-way joint, at least one joint of the three-way joint is communicated with an oil discharge pipe, and at least one joint of the three-way joint is communicated with an oil inlet pipe.
The lubricating oil pipe is provided with a spiral sleeve rotationally connected with the lubricating oil pipe, the inner wall of the spiral sleeve is provided with a spiral sheet for feeding grease, and the outside of the spiral sleeve is provided with a poking wheel blade. The end part of the eccentric bracket, which is far away from the fixed section, is provided with a poking piece for poking the poking wheel blade.
The beneficial effects of the invention are as follows:
1. The variable frequency yaw actuating mechanism of the wind power generation fan can be used for disengaging the yaw gear corresponding to the yaw motor with the yaw annular gear when the yaw motor fails, and simultaneously enabling the yaw motor in a normal working state to be uniformly distributed again to give uniform driving force to the yaw annular gear.
2. The variable frequency yaw actuating mechanism of the wind power generation fan can be provided with the combined sealing ring at the yaw annular gear, a relatively sealed lubricating oil duct can be formed at the yaw annular gear, meshing transmission impurities between the yaw gear and the yaw annular gear are reduced, and meanwhile, the combined sealing ring does not interfere the position movement of the yaw gear when a yaw motor fails. Moreover, when the yaw gear rotates, the lubricating oil pipe can continuously supply oil to the lubricating oil duct, so that oil lubrication between the yaw gear and the yaw annular gear is kept, timely lubrication maintenance is formed, meshing abrasion is reduced, and meshing failure between the yaw gear and the yaw annular gear is further reduced.
Drawings
FIG. 1 is a schematic diagram of a variable frequency yaw actuator of the wind turbine;
FIG. 2 is a schematic diagram of the structure of the motor bracket of the variable frequency yaw actuator;
FIG. 3 is a schematic diagram of a motor bracket with yaw motor failure;
fig. 4 is a schematic structural diagram of a yaw ring gear of the variable frequency yaw actuator;
FIG. 5 is a schematic diagram of the structure of the variable frequency yaw actuator A;
FIG. 6 is a schematic diagram of a combined seal ring of the variable frequency yaw actuator;
Fig. 7 is a schematic diagram of a structure of a combined sealing ring B of the variable frequency yaw actuator.
In the figure: 1. a tower; 2. a set top box; 3. yaw ring gear; 4. a yaw gear; 5. a yaw motor; 6. a motor bracket; 7. a lubrication oil passage; 8. a lubrication pipe; 9. a support base; 10. a sliding pad; 11. a brake member; 12. a combined sealing ring;
21. a slewing bearing; 31. an inner ring groove; 41. an outer ring groove; 51. an output shaft; 52. an eccentric bracket; 53. a pulling piece; 54. an eccentric movable block; 55. an eccentric cylinder; 56. a combining seat; 57. a combining cylinder; 58. a bonding plate; 511. a fixed section; 512. a movable section; 501. a failure motor; 61. an annular chute; 62. a slide block; 63. a distance measuring member; 81. a helical sleeve; 82. a thumb wheel blade; 83. a three-way joint; 84. an oil drain pipe; 85. an oil discharge valve; 86. an oil inlet pipe; 121. a gear wrapping block; 122. and a spacer block.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1, a variable frequency yaw actuator of a wind turbine includes a yaw ring gear 3 and four yaw gears 4, and the four yaw gears 4 are engaged with the yaw ring gear 3. Wherein, 3 fixed connection machine top casees 2 of driftage ring gear, set up the fan blade on the machine top casees 2, the output of yaw motor 5 is connected to yaw gear 4, and yaw gear 4 and yaw motor 5 are connected in pylon 1. The yaw motor 5 drives the yaw gear 4 to rotate, and the yaw gear 4 drives the yaw annular gear 3 to rotate, so that steering yaw of the top box 2 is realized.
Referring to fig. 1, a slewing bearing 21 is provided between a tower 1 and a roof box 2, and the tower 1 and the roof box 2 are rotatably connected. Referring to fig. 4, a ring-shaped supporting seat 9 for supporting the yaw ring gear 3 is provided on the tower 1, and a sliding pad 10 and a brake 11 are provided on the supporting seat 9. The sliding pad 10 serves to support the yaw ring gear 3 for reducing friction at the bottom of the yaw ring gear 3. The brake element 11 is used for braking the yaw ring gear 3 and for enabling the set-top box 2 to be stationary relative to the tower 1.
The variable frequency yaw actuating mechanism of the wind power generation fan further comprises an annular motor bracket 6 fixedly connected to the tower 1, and the motor bracket 6 and the yaw inner gear ring 3 are coaxially arranged. Referring to fig. 2, the motor bracket 6 is provided with an annular chute 61 and a slide block 62 matched with the annular chute 61, the yaw motor 5 is fixedly installed on the slide block 62, two sides of the slide block 62 are respectively provided with a distance measuring piece 63, and the distance measuring piece 63 is used for measuring the distance between the slide blocks 62 adjacent to the yaw motor 5 in a normal working state. The motor bracket 6 is provided with a motor driving part for driving the sliding blocks 62 to move, and distance measurement is performed through a distance measuring part 63, so that the distance between the sliding blocks 62 where the yaw motor 5 is located in a normal working state is ensured to be equal.
Referring to fig. 2, the distance measuring pieces 63 at both sides of the slider 62 are a distance measuring piece W1 and a distance measuring piece W2, the distance measuring pieces W1 and the distance measuring pieces W2 between adjacent sliders 62 are measured with each other, and when the four yaw motors 5 are in a normal operation state, the distance between the distance measuring pieces W1 and W2 is kept to be L1.
Referring to fig. 5, the output shaft 51 of the yaw motor 5 includes a fixed section 511 at an upper portion and a movable section 512 at a lower portion. The lower end of the fixed section 511 is fixedly provided with an eccentric bracket 52, the bottom of the eccentric bracket 52 is provided with an eccentric sliding groove and an eccentric movable block 54 matched with the eccentric sliding groove, and the eccentric movable block 54 is in sliding connection with the eccentric bracket 52. The lower part of the eccentric movable block 54 is connected with a movable section 512, and the lower end of the movable section 512 is fixedly connected with a yaw gear 4. An eccentric cylinder 55 is arranged in the eccentric sliding groove, and the eccentric cylinder 55 is used for driving an eccentric movable block 54 to move in the eccentric sliding groove, so that the movable section 512 moves eccentrically relative to the fixed section 511, and the eccentric movable block is used for cutting off the engagement of the yaw gear 4 and the yaw inner gear ring 3.
In order to avoid interference between the yaw gear 4 and the yaw ring gear 3 when the yaw gear 4 moves, the yaw gear 4 needs to leave the yaw ring gear 3 in a direction pointing to the axis of the yaw ring gear 3, and at this time, it is required to keep the extending direction of the eccentric sliding groove on the eccentric bracket 52 pointing to the center of a circle. In order to realize that the extending direction of the eccentric sliding groove on the eccentric bracket 52 points to the circle center when the yaw motor 5 is stopped, the yaw motor 5 in the embodiment selects a motor with a function of accurate stopping, and when the yaw motor 5 is powered off, the output shaft of the yaw motor 5 is kept to stop rotating when the extending direction of the eccentric sliding groove on the eccentric bracket 52 points to the circle center.
Referring to fig. 5, a coupling seat 56 is disposed below the eccentric movable block 54, the coupling seat 56 is rotatably connected to the upper side of the movable section 512, and a coupling member for restricting rotation between the eccentric movable block 54 and the movable section 512 is disposed between the eccentric movable block 54 and the movable section 512. The combining piece comprises a combining cylinder 57 and a combining plate 58, the upper end of the combining cylinder 57 is fixedly connected with a combining seat 56, the lower end of the combining cylinder 57 is fixedly connected with the combining plate 58, the combining plate 58 is used for combining with the upper part of the movable section 512, the combining cylinder 57 presses the combining plate 58, static friction is generated between the combining plate 58 and the upper part of the movable section 512, and the fixed connection between the eccentric movable block 54 and the movable section 512 is formed.
When the yaw gear 4 is engaged with the yaw ring gear 3, the engagement plate 58 is engaged with the upper side of the movable section 512, the eccentric movable block 54 is fixedly connected with the movable section 512, and the fixed section 511 and the movable section 512 can coaxially rotate. When the yaw ring gear 3 is shifted to the target position, the brake 11 achieves timely stopping of the yaw ring gear 3 and the yaw gear 4, and simultaneously, the combining cylinder 57 is contracted, the combining plate 58 is separated from the upper part of the movable section 512, and the output shaft 51 of the yaw motor 5 is stopped when the extending direction of the eccentric sliding chute points to the center of the circle. After the yaw motor 5 is completely stopped, the coupling plate 58 of the coupling cylinder 57 continues to be coupled to the upper side of the movable section 512, and waits for the next yaw operation.
When the yaw motor 5 is in a normal working state, the movable section 512 and the fixed section 511 of the yaw motor 5 are in a coaxial state, and the yaw gear 4 is meshed with the yaw ring gear 3. When the yaw motor 5 is in a failure state, the movable section 512 and the fixed section 511 of the yaw motor 5 are in different axial states, namely, the movable section 512 is eccentric relative to the fixed section 511, the yaw gear 4 is not meshed with the yaw inner gear ring 3, and the failure yaw motor 5 is prevented from affecting the operation of the yaw motor 5 in a normal working state.
When one of the yaw motors 5 fails, the yaw gear 4 corresponding to the yaw motor 5 is in meshing disconnection with the yaw annular gear 3, and then a motor driving piece on the motor bracket 6 drives the other yaw motors 5 in a normal working state to move, so that the yaw motors are uniformly distributed again. Referring to fig. 3, the failure motor 501 does not work corresponding to the ranging piece of the slider 62, the yaw motors 5 in the three normal operation states work corresponding to the ranging piece of the slider 62, the ranging piece W1 and the ranging piece W2 between the three adjacent sliders 62 range each other, the distances between the ranging piece W1 and the ranging piece W2 are kept to be L2, so that the three yaw motors 5 in the normal operation states are uniformly distributed, and a uniform driving force is given to the yaw ring gear 3.
In the course of the movement of the yaw motor 5, the yaw gear 4 moves synchronously with the yaw motor 5 by rotating.
In the embodiment, when the yaw motor 5 is in a failure state, the variable frequency yaw actuating mechanism of the wind turbine breaks away from the engagement of the yaw gear 4 and the yaw inner gear ring 3 corresponding to the failure yaw motor 5, and simultaneously, the yaw motor 5 in a normal working state can be uniformly distributed again, and uniform driving force is given to the yaw inner gear ring 3.
Example 2
Referring to fig. 1 and 6, unlike embodiment 2, the variable frequency yaw actuator of the wind turbine further includes a combined seal ring 12 located at the inner edge of the yaw ring gear 3. The tooth part of the yaw inner gear ring 3 is provided with an inner ring groove 31, the tooth part of the yaw gear 4 is provided with an outer ring groove 41 with a position corresponding to the inner ring groove 31, the joint of the inner ring groove 31, the yaw inner gear ring 3 and the yaw gear 4 is sealed by the combined sealing ring 12, and a lubricating oil duct 7 is formed between the combined sealing ring 12 and the inner ring groove 31. The lubricating oil duct 7 is filled with lubricating grease for lubrication between the yaw ring gear 3 and the yaw gear 4.
The composite seal ring 12 includes a gear wrap block 121 and a spacer block 122. The gear wrapping block 121 is used for sealing the meshing position of the yaw ring gear 3 and the yaw gear 4 and the inner ring groove 31, and the central angle corresponding to the gear wrapping block 121 is 60 degrees; the spacing blocks 122 are positioned between the yaw gears 4 and only seal the inner ring grooves 31, and the central angle corresponding to the spacing blocks 122 is 30 degrees.
In this embodiment, the gear wrapping block 121 is connected to the movable section 512, and the gear wrapping block 121 is rotatably connected to the movable section 512; the spacing blocks 122 are in sliding connection with the yaw ring gear 3, and electromagnetic blocks are respectively arranged on two sides of the spacing blocks 122 and are used for forming attraction and repulsion separation between the spacing blocks 122.
When one of the yaw motors 5 fails, at least two of the other yaw motors 5 need to be moved in position, so that the yaw motors 5 and the yaw gears 4 in the normal working state can be kept uniformly distributed, and the gear wrapping blocks 121 and the spacing blocks 122 also need to form corresponding position distribution. When the yaw motor 5 moves, the movable section 512 moves on the eccentric bracket 52, and the gear wrapping block 121 and the yaw gear 4 leave the yaw ring gear 3, where the positions of the gear wrapping block 121 and the yaw gear 4 need to be kept without affecting the movement of the spacer block 122. The spacer 122 is separated by attraction or repulsion through the acting force between the electromagnetic blocks, a gap is formed at the moving target position of the yaw motor 5, when the yaw motor 5 moves to the target position, the gear wrapping block 121 and the yaw gear 4 also move to the target position in the yaw annular gear 3, at the moment, the movable section 512 moves and resets on the eccentric bracket 52, the gear wrapping block 121 and the yaw gear 4 approach the yaw annular gear 3, the yaw gear 4 is meshed with the yaw annular gear 3 again, and the gear wrapping block 121 and the spacer 122 are combined to form a complete combined sealing ring 12.
Referring to fig. 5, the variable frequency yaw actuator of the wind turbine further comprises a lubrication pipe 8 fixedly connected to the gear wrapping block 121, wherein the lower portion of the lubrication pipe 8 is communicated with the lubrication oil duct 7, the upper portion of the lubrication pipe 8 is connected with a three-way joint 83, at least one joint of the three-way joint 83 is communicated with an oil discharge pipe 84, and at least one joint of the three-way joint 83 is communicated with an oil inlet pipe 86. The oil inlet pipe 86 is connected with a grease tank, the oil inlet pipe 86 is used for entering grease in the grease pipe 8, and the oil discharge pipe 84 is used for discharging grease in the grease pipe 8. The oil drain pipe 84 is provided with an oil drain valve 85 as described above, and the oil drain valve 85 is used to open or close the oil drain pipe 84.
Referring to fig. 5 and 7, the above-mentioned lubricating oil pipe 8 is provided with a screw sleeve 81 rotatably connected to the lubricating oil pipe 8, the inner wall of the screw sleeve 81 is provided with a screw for feeding grease, and the outside of the screw sleeve 81 is provided with a thumb wheel blade 82. The tip that fixed section 511 was kept away from to eccentric support 52 sets up plectrum 53, and when eccentric support 52 followed fixed section 511 and rotated, plectrum 53 can stir plectrum blade 82 on the screw sleeve 81, forms the rotation of screw sleeve 81, and the inside spiral piece of screw sleeve 81 can promote the grease feeding in the lubricating oil pipe 8, and lubricating grease gets into lubricating oil duct 7 and lubricates the meshing between yaw gear 4 and yaw ring gear 3, reduces the tooth phenomenon of beating between yaw gear 4 and the yaw ring gear 3.
During normal operation, the yaw ring gear 3 deflects less, and at this time, the oil drain valve 85 is kept closed, so that excessive grease can be carried out from the tooth gaps of the yaw gear 4.
When the lubricating oil duct 7 needs to be cleaned, at least one yaw motor 5 is kept not to work, an oil discharge valve 85 corresponding to the lubricating oil duct 8 is opened, at least one yaw motor 5 works, a poking piece 53 on the yaw motor 5 continuously pushes a spiral sleeve 81 to rotate, continuous oil feeding of the lubricating oil duct 7 is kept, and the opened oil discharge duct 84 discharges oil. This operation extrudes the original grease inside the lubrication oil duct 7 from the oil drain pipe 84, and new grease enters the lubrication oil duct 7 from the lubrication oil pipe 8 corresponding to the working yaw motor 5, thereby realizing grease replacement.
In this embodiment, the working process of the variable frequency yaw actuator of the wind turbine includes the following states:
And (one) when all yaw motors work normally:
All the movable sections 512 and the fixed sections 511 of the yaw motors 5 are in a coaxial state, all the yaw gears 4 are meshed with the yaw annular gear 3, the yaw motors 5 drive the yaw gears 4 to rotate, and the yaw gears 4 drive the yaw annular gear 3 to rotate, so that the top box 2 rotates relative to the tower 1, and steering yaw of the top box 2 is realized. Simultaneously, the eccentric bracket 52 of the yaw motor 5 rotates along with the fixed section 511, the poking piece 53 can poke the poking wheel blades 82 on the spiral sleeve 81 to form the rotation of the spiral sleeve 81, the spiral piece inside the spiral sleeve 81 can push grease in the lubricating oil pipe 8 to feed, the lubricating grease enters the lubricating oil duct 7 to lubricate the meshing between the yaw gear 4 and the yaw inner gear ring 3, and tooth striking phenomenon between the yaw gear 4 and the yaw inner gear ring 3 is reduced.
(II) when one of the yaw motors fails:
Step one, an eccentric cylinder 55 of a failure motor 501 drives an eccentric movable block 54 to move in an eccentric chute, a movable section 512 moves eccentrically relative to a fixed section 511, the engagement of a yaw gear 4 and a yaw inner gear ring 3 is cut off, and meanwhile, the failure motor 501 does not work corresponding to a distance measuring piece of a sliding block 62;
step two, the movable sections 512 of the yaw motor 5 in three normal working states move on the eccentric bracket 52, so that the gear wrapping block 121 and the yaw gear 4 leave the yaw annular gear 3, the spacer blocks 122 are separated in attraction or repulsion through acting force between the electromagnetic blocks, and a gap is formed at a target position where the yaw motor 5 moves;
Step three, a motor driving piece of the motor bracket 6 drives the sliding blocks 62 to move, and referring to fig. 3, distance measuring pieces W1 and W2 between three adjacent sliding blocks 62 measure distance between each other, and the distance between the distance measuring pieces W1 and W2 is kept equal, at this time, the yaw motor 5 moves to a target position, and three yaw motors 5 are uniformly distributed;
Step four, the movable section 512 moves and resets on the eccentric bracket 52, the gear wrapping block 121 and the yaw gear 4 approach to the yaw annular gear 3, the yaw gear 4 is meshed with the yaw annular gear 3 again, and the gear wrapping block 121 and the spacing block 122 are combined to form a complete combined sealing ring 12;
Step five, the yaw motors 5 in three normal working states work, the three yaw gears 4 with the distribution drive the yaw annular gear 3 to rotate, uniform driving force is given to the yaw annular gear 3, the rotation of the top box 2 relative to the tower 1 is achieved, and steering yaw of the top box 2 is achieved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (2)
1. The variable frequency yaw actuating mechanism of the wind power generation fan comprises at least one yaw annular gear (3) fixedly connected with a top box (2) and at least one yaw gear (4), wherein the yaw gear (4) is meshed with the yaw annular gear (3), and the yaw gear (4) is connected with the output end of a yaw motor (5), and the variable frequency yaw actuating mechanism is characterized by further comprising an annular motor bracket (6) fixedly connected with a tower (1), and the motor bracket (6) and the yaw annular gear (3) are coaxially arranged;
The yaw motor comprises a motor bracket (6), a yaw motor (5) and a distance measuring piece (63) used for measuring the distance between the adjacent yaw motors (5) in a normal working state and the distance between the adjacent yaw motors (62) in the normal working state are respectively arranged on two sides of the slide block (62), wherein the annular slide groove (61) and the slide block (62) matched with the annular slide groove (61) are arranged on the motor bracket (6);
The output shaft (51) of the yaw motor (5) comprises a fixed section (511) positioned at the upper part and a movable section (512) positioned at the lower part, wherein an eccentric bracket (52) is fixedly arranged at the lower end of the fixed section (511), an eccentric movable block (54) which is in sliding connection with the eccentric bracket (52) is arranged at the bottom of the eccentric bracket (52), the movable section (512) is rotatably connected below the eccentric movable block (54), a yaw gear (4) is fixedly connected at the lower end of the movable section (512), and a combining piece for limiting rotation between the eccentric movable block (54) and the movable section (512) is arranged between the eccentric movable block (54) and the movable section (512);
The variable frequency yaw actuating mechanism further comprises a combined sealing ring (12) positioned at the inner edge of the yaw inner gear ring (3), an inner annular groove (31) is formed in the tooth part of the yaw inner gear ring (3), an outer annular groove (41) corresponding to the inner annular groove (31) is formed in the tooth part arrangement position of the yaw gear (4), the combined sealing ring (12) seals the meshing part of the inner annular groove (31) and the engagement part of the yaw inner gear ring (3) and the yaw gear (4), and a lubricating oil duct (7) is formed between the combined sealing ring (12) and the inner annular groove (31);
the combined sealing ring (12) comprises a gear wrapping block (121) and a spacing block (122);
The gear wrapping block (121) is used for sealing the meshing position of the yaw annular gear (3) and the yaw gear (4) and the inner ring groove (31), and the central angle corresponding to the gear wrapping block (121) is 60 degrees; the spacing blocks (122) are positioned between the yaw gears (4) and only seal the inner annular grooves (31), and the central angles corresponding to the spacing blocks (122) are 30 degrees;
The variable frequency yaw actuating mechanism further comprises a lubricating oil pipe (8) fixedly connected to the gear wrapping block (121), the lower part of the lubricating oil pipe (8) is communicated with the lubricating oil duct (7), the upper part of the lubricating oil pipe (8) is connected with a three-way joint (83), at least one joint of the three-way joint (83) is communicated with an oil discharge pipe (84), and at least one joint of the three-way joint (83) is communicated with an oil inlet pipe (86);
A spiral sleeve (81) which is rotationally connected with the lubricating oil pipe (8) is arranged on the lubricating oil pipe (8), a spiral sheet for feeding grease is arranged on the inner wall of the spiral sleeve (81), and a thumb wheel blade (82) is arranged outside the spiral sleeve (81);
The end of the eccentric bracket (52) far away from the fixed section (511) is provided with a poking piece (53) for poking the poking wheel blade (82).
2. The variable frequency yaw actuator of a wind turbine according to claim 1, wherein when the yaw motor (5) is in a normal operation state, the movable section (512) and the fixed section (511) of the yaw motor (5) are in a coaxial state, and the yaw gear (4) is meshed with the yaw ring gear (3);
when the yaw motor (5) is in a failure state, the movable section (512) and the fixed section (511) of the yaw motor (5) are in different axial states, and the yaw gear (4) is not meshed with the yaw inner gear ring (3).
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| CN113482850A (en) * | 2021-06-24 | 2021-10-08 | 浙江大学 | Distributed electro-hydraulic driven fan yawing and braking system |
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| KR20230090496A (en) * | 2021-12-15 | 2023-06-22 | 한국기계연구원 | Active brake release device and control method to relieve yaw drive overload |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2708738A1 (en) * | 2012-09-12 | 2014-03-19 | Alstom Wind, S.L.U. | Wind turbine |
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| CN103742361A (en) * | 2013-12-30 | 2014-04-23 | 三一重型能源装备有限公司 | Yaw system and wind-driven generator set |
| CN208502963U (en) * | 2018-06-19 | 2019-02-15 | 南京工业职业技术学院 | A kind of wind-driven generator unit yaw bearing |
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