CN110761948A - Active pitch-changing adjusting device for small and medium-sized wind generating set - Google Patents
Active pitch-changing adjusting device for small and medium-sized wind generating set Download PDFInfo
- Publication number
- CN110761948A CN110761948A CN201911156215.1A CN201911156215A CN110761948A CN 110761948 A CN110761948 A CN 110761948A CN 201911156215 A CN201911156215 A CN 201911156215A CN 110761948 A CN110761948 A CN 110761948A
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- hub
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- generator
- gear
- rack
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- 230000007246 mechanism Effects 0.000 claims abstract description 31
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 230000001360 synchronised effect Effects 0.000 claims abstract description 27
- 230000009467 reduction Effects 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/022—Adjusting aerodynamic properties of the blades
- F03D7/0224—Adjusting blade pitch
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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
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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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
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The invention provides a small and medium-sized wind generating set active pitch-changing adjusting device, which comprises a generator, wherein the generator is provided with a generator hollow shaft; the traction mechanism comprises a push-pull rod capable of moving along the axial direction; the actuating mechanism comprises a synchronous disc, blades, a rack, a gear and a transmission rod, wherein the blades are connected to a hub fixedly connected with a hollow shaft of the generator, the blades can rotate relative to the hub, one end of the transmission rod is connected with a push-pull rod, the other end of the transmission rod penetrates through the hollow shaft of the generator to be connected with the synchronous disc, the rack is fixedly connected with the synchronous disc and can axially move on the hub under the driving of the synchronous disc, the gear is fixed at the root of each blade, and the gear is meshed with the rack. The invention can realize active synchronous pitch variation for small and medium-sized wind generating sets, and has the advantages of simple structure, low cost, convenient maintenance and strong environment adaptability.
Description
Technical Field
The invention mainly relates to the related technical field of wind driven generators, in particular to a device for adjusting the active pitch of a small and medium-sized wind generating set.
Background
At present, a variable pitch mechanism of a wind driven generator mainly adopts a motor independent variable pitch mechanism and a hydraulic variable pitch mechanism, wherein the variable pitch of each blade is realized through a separate driving motor, so that the transmission ratio of the driving motor is high, most of the variable pitch mechanisms are driven by a planetary gear or a worm, and an angular position of each blade is measured by using an angular position mark or other sensors to accurately determine the angular position of each blade, so that the pitch angles of the blades are kept consistent, and the independent variable pitch mechanism is high in cost, complex in structure and relatively high in failure rate. The hydraulic variable-pitch mechanism can simultaneously drive three blades to pitch by one thrust rod and can also be used for an independent variable-pitch mechanism, but because the hub rotates all the time, hydraulic oil must be introduced into the rotating hub from a hydraulic station in the cabin through a rotating flow passage, the sealing of the hydraulic oil in a rotating system is not easy to guarantee; meanwhile, the hydraulic oil is greatly influenced by the ambient temperature, and a hydraulic oil heating or cooling device is additionally arranged when the hydraulic oil is used in different regions.
The two variable pitch adjusting mechanisms are not suitable for the variable pitch adjustment of small and medium-sized wind turbines due to the complexity of the mechanisms and the cost. At present, medium and small sized wind turbines basically adopt a fixed pitch structure, and the control of power under the condition of strong wind cannot be effectively realized. Even for fixed pitch stall controlled wind turbines, stall control relies on the unique profile of the blade, making the blade shaping process difficult and difficult to estimate for the aerodynamics of the blade after stall.
Disclosure of Invention
In order to solve the problems, the invention provides an active pitch-changing adjusting device for small and medium-sized wind generating sets, which can realize active synchronous pitch changing for the small and medium-sized wind generating sets and has the advantages of simple structure, low cost, convenient maintenance and strong environment adaptability.
The technical scheme of the invention is as follows:
a middle and small-sized wind generating set active pitch-control adjusting device comprises:
a generator provided with a generator hollow shaft;
the traction mechanism comprises a push-pull rod capable of moving along the axial direction;
the actuating mechanism comprises a synchronous disc, blades, a rack, a gear and a transmission rod, wherein the blades are connected to a hub fixedly connected with a hollow shaft of the generator, the blades can rotate relative to the hub, one end of the transmission rod is connected with a push-pull rod, the other end of the transmission rod penetrates through the hollow shaft of the generator to be connected with the synchronous disc, the rack is fixedly connected with the synchronous disc and can axially move on the hub under the driving of the synchronous disc, the gear is fixed at the root of each blade, and the gear is meshed with the rack.
Furthermore, the number of the blades arranged on the hub is three, the three blades are uniformly arranged on the hub, each blade is correspondingly provided with a gear, and each gear is correspondingly provided with a rack.
Further, the blades are connected with the hub through a pitch bearing.
Furthermore, one end of the rack is fixedly connected to the end face of the synchronous disc, and a sliding rail at the bottom of the rack is in sliding fit with the hub.
Furthermore, the synchronous disc is connected with the end part of the transmission rod through a fixed nut and a thrust bearing.
Further, a bearing support is arranged between the generator and the traction mechanism, the bearing support is fixedly installed on a bottom plate of the engine room, a linear bearing is arranged in the bearing support, and the transmission rod is in sliding fit with the linear bearing.
Furthermore, the transmission rod is connected with the push-pull rod through a flange plate.
Furthermore, the traction mechanism further comprises a traction mechanism support, a worm and gear reduction box and a servo motor, the push-pull rod is connected with the worm and gear reduction box, the push-pull rod, the worm and gear reduction box and the servo motor are fixedly arranged on the traction mechanism support, and the traction mechanism support is fixedly arranged on the cabin bottom plate.
The invention has the beneficial effects that:
the adjusting device can perform synchronous pitch-changing adjustment on the small wind generating set so as to achieve the purpose of synchronously changing the pitch angles of the three blades, thereby controlling the output power and protecting the safe operation of the wind generating set; compared with the traditional variable-pitch structure, the variable-pitch structure is simple in structure and easy to realize; according to the invention, the three racks uniformly and fixedly arranged on the synchronous disc respectively drive the gear at the root part of the blade to rotate, so that the variable-pitch synchronism of each blade is high.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a part of the structure of the adjusting device of the present invention.
Reference numerals shown in the drawings:
1-synchronous disc, 2-thrust bearing, 3-fixing nut, 4-variable pitch bearing, 5-blade, 6-rack, 7-gear, 8-transmission rod, 9-hub, 10-generator, 11-generator hollow shaft, 12-bearing support, 13-linear bearing, 14-flange plate, 15-push-pull rod, 16-traction mechanism support, 17-worm gear reduction box, 18-servo motor and 19-cabin bottom plate.
Detailed Description
The present embodiment will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present embodiments. Furthermore, it should be understood that various changes or modifications to the embodiments can be made by those skilled in the art after reading the teaching of the embodiments, and these equivalents also fall within the scope defined by the present application.
As shown in fig. 1 and 2, the active synchronous pitch control device for a small and medium-sized wind generating set provided by this embodiment is efficient and simple, and can control blades to change pitch synchronously in real time to achieve the purposes of stabilizing output power and protecting safe operation of the set.
The active synchronous pitch control device for the small and medium-sized wind driven generator provided by the embodiment comprises the following components:
the traction mechanism comprises a push-pull rod 15, a worm gear reduction box 17 and a servo motor 18.
The actuating mechanism comprises a synchronous disc 1, blades 5, a rack 6, a gear 7 and a transmission rod 8.
In this embodiment, there are three blades 5 in the actuator, and the three blades are connected to the hub 9 through the pitch bearing 4, so as to ensure that the blades 5 can rotate in a circumferential direction flexibly through the pitch bearing 4. In the embodiment, a gear 7 is fixed at the root of the blade 5, three racks 6 are uniformly fixed on the synchronous disk 1, and the gear 7 is meshed with the racks 6; the left side of the rack 6 is fixedly arranged on the synchronous disc 1, and the bottom guide rail is connected to the hub 9 in a sliding manner, so that the rack 6 can axially move on the hub 9 under the driving of the synchronous disc 1, and the axial movement in the embodiment refers to the movement along the axial direction of the generator 10; the synchronous disc 1 is connected with the left end of the transmission rod 8 through the fixing nut 3 and the thrust bearing 2, and the thrust bearing 2 can transmit the axial force of the transmission rod 8 to the synchronous disc 1 and can also ensure that the transmission rod 8 does not rotate along with the rotation of the hub 9; the hub 9 is fixedly connected with the generator hollow shaft 11 through a flange; the transmission rod 8 is in clearance fit with the generator hollow shaft 11, and the tail of the transmission rod 8 penetrates through the generator hollow shaft 11 to be in sliding connection with a linear bearing 13 fixedly arranged on a bearing support 12, so that the transmission rod 8 is ensured to move axially in the generator hollow shaft 11; the rightmost end of the transmission rod 8 is fixedly connected with a push-pull rod 15 in the traction mechanism through a flange 14; the push-pull rod 15 is driven by the worm gear reduction box 17 to move axially; the push-pull rod 15, the worm gear reduction box 17 and the servo motor 18 are fixedly arranged on the traction mechanism bracket 16; the bearing support 12 and the traction mechanism support 16 are fixedly mounted on a nacelle floor 19.
The specific working principle of the adjusting device provided by the embodiment is as follows:
when the servo motor 18 rotates forwards and backwards, axial thrust or pulling force is applied to the push-pull rod 15 through the worm gear reduction box 17 to achieve the purpose of changing the stroke of the transmission rod 8, the transmission rod 8 transmits the axial force to the three racks 6 which are connected with the transmission rod 8 and evenly distributed, when the synchronous disk 1 drives the racks 6 to move, the three gears 7 meshed with the racks 6 rotate along with the racks, the gears 7 are fixedly arranged at the roots of the blades 5, and the three blades 5 rotate along with the rotation of the gears 7, so that the blades 5 can be controlled by the servo motor 18 to rotate circumferentially to achieve the purpose of synchronously changing the pitch angles of the three blades 5, thereby controlling the output power and protecting the safe operation of the wind generating set.
Claims (8)
1. The utility model provides a middle-size and small-size wind generating set initiative becomes oar adjusting device which characterized in that includes:
a generator provided with a generator hollow shaft;
the traction mechanism comprises a push-pull rod capable of moving along the axial direction;
the actuating mechanism comprises a synchronous disc, blades, a rack, a gear and a transmission rod, wherein the blades are connected to a hub fixedly connected with a hollow shaft of the generator, the blades can rotate relative to the hub, one end of the transmission rod is connected with a push-pull rod, the other end of the transmission rod penetrates through the hollow shaft of the generator to be connected with the synchronous disc, the rack is fixedly connected with the synchronous disc and can axially move on the hub under the driving of the synchronous disc, the gear is fixed at the root of each blade, and the gear is meshed with the rack.
2. The active pitch adjusting device of claim 1, wherein the number of the blades arranged on the hub is three, the three blades are uniformly arranged on the hub, each blade is correspondingly provided with a gear, and each gear is correspondingly provided with a rack.
3. The active pitch adjusting device of a small and medium sized wind generating set according to claim 1, wherein the blades are connected with the hub through a pitch bearing.
4. The active pitch adjusting device of a small and medium sized wind generating set according to claim 1, wherein one end of the rack is fixedly connected to the end face of the synchronization disc, and a slide rail at the bottom of the rack is in sliding fit with the hub.
5. The active pitch adjusting device of a small and medium sized wind generating set according to claim 1, wherein the synchronization disc is connected with the end of the transmission rod through a fixing nut and a thrust bearing.
6. The active pitch-control device of claim 1, wherein a bearing support is arranged between the generator and the traction mechanism, the bearing support is fixedly mounted on a bottom plate of a cabin, a linear bearing is arranged in the bearing support, and the transmission rod is in sliding fit with the linear bearing.
7. The active pitch-adjusting device of small and medium-sized wind generating set according to claim 1, wherein the transmission rod is connected with the push-pull rod through a flange plate.
8. The active pitch-control adjusting device of a small and medium-sized wind generating set according to claim 1, wherein the traction mechanism further comprises a traction mechanism support, a worm and gear reduction box and a servo motor, the push-pull rod is connected with the worm and gear reduction box, the push-pull rod, the worm and gear reduction box and the servo motor are fixedly installed on the traction mechanism support, and the traction mechanism support is fixedly installed on a cabin bottom plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911156215.1A CN110761948A (en) | 2019-11-22 | 2019-11-22 | Active pitch-changing adjusting device for small and medium-sized wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911156215.1A CN110761948A (en) | 2019-11-22 | 2019-11-22 | Active pitch-changing adjusting device for small and medium-sized wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110761948A true CN110761948A (en) | 2020-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911156215.1A Pending CN110761948A (en) | 2019-11-22 | 2019-11-22 | Active pitch-changing adjusting device for small and medium-sized wind generating set |
Country Status (1)
| Country | Link |
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| CN (1) | CN110761948A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177844A (en) * | 2020-10-14 | 2021-01-05 | 内蒙古工业大学 | Hub structure of small variable-pitch wind turbine and mounting method |
| CN112576447A (en) * | 2021-01-13 | 2021-03-30 | 杭州川宜影音科技有限公司 | Automatic reversing wind-driven generator |
| CN112879214A (en) * | 2021-01-12 | 2021-06-01 | 罗国聪 | Small-size fan wind-powered electricity generation wheel hub with automatic oar structure that becomes |
| CN114576092A (en) * | 2022-03-18 | 2022-06-03 | 无锡双尚机电科技有限公司 | Wind generating set with impeller variable pitch synchronous driving function |
| CN115095479A (en) * | 2022-07-08 | 2022-09-23 | 江苏乃尔风电技术开发有限公司 | Active pitch-changing adjusting equipment of wind generating set |
-
2019
- 2019-11-22 CN CN201911156215.1A patent/CN110761948A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112177844A (en) * | 2020-10-14 | 2021-01-05 | 内蒙古工业大学 | Hub structure of small variable-pitch wind turbine and mounting method |
| CN112879214A (en) * | 2021-01-12 | 2021-06-01 | 罗国聪 | Small-size fan wind-powered electricity generation wheel hub with automatic oar structure that becomes |
| CN112576447A (en) * | 2021-01-13 | 2021-03-30 | 杭州川宜影音科技有限公司 | Automatic reversing wind-driven generator |
| CN114576092A (en) * | 2022-03-18 | 2022-06-03 | 无锡双尚机电科技有限公司 | Wind generating set with impeller variable pitch synchronous driving function |
| CN114576092B (en) * | 2022-03-18 | 2023-03-10 | 无锡双尚机电科技有限公司 | Wind generating set with impeller variable pitch synchronous driving function |
| CN115095479A (en) * | 2022-07-08 | 2022-09-23 | 江苏乃尔风电技术开发有限公司 | Active pitch-changing adjusting equipment of wind generating set |
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