CN114704429A - Self-torsion magnetic resistance variable-pitch wind driven generator - Google Patents
Self-torsion magnetic resistance variable-pitch wind driven generator Download PDFInfo
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- CN114704429A CN114704429A CN202210292764.7A CN202210292764A CN114704429A CN 114704429 A CN114704429 A CN 114704429A CN 202210292764 A CN202210292764 A CN 202210292764A CN 114704429 A CN114704429 A CN 114704429A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 210000004907 gland Anatomy 0.000 claims description 3
- 241000227287 Elliottia pyroliflora Species 0.000 claims description 2
- 230000009471 action Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002441 reversible 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
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
Abstract
The invention is applicable to the related field of wind driven generators, and provides a self-torsion magnetic resistance variable-pitch wind driven generator which comprises a generator set, a unit revolving body and a tower component, the generator set comprises a main generator, an auxiliary variable pitch generator, a main generator set motor shell and an auxiliary generator set motor shell and blades, the main generator comprises a main generator shaft, a main generator rotor and a main generator stator, the auxiliary variable pitch generator comprises an auxiliary variable pitch generator shaft, an auxiliary variable pitch generator rotor and an auxiliary variable pitch generator stator, the shaft head position of the main generator shaft is also provided with a variable pitch hub, the auxiliary variable pitch generator shaft penetrates through the main generator shaft, the auxiliary variable-pitch generator shaft is characterized in that a variable-pitch synchronous disc is arranged at the shaft head position of the auxiliary variable-pitch generator shaft, and a first slewing bearing is arranged on the variable-pitch hub.
Description
Technical Field
The invention relates to the related field of wind driven generators, in particular to a self-torque magnetic resistance variable-pitch wind driven generator.
Background
When the wind driven generator runs, the blades rotate faster when the wind driven generator encounters strong wind, if the wind driven generator exceeds the rated rotating speed, a light person can burn the generator, and a heavy person can break down the whole generator due to centrifugal force.
At present, the pitch variation technology of the wind driven generator has two types: electrically controlled variable pitch and centrifugal variable pitch. The electric control variable pitch mode is active pitch control, the controller system and the PLC detect the voltage and the current of the generator, the auxiliary motor, the hydraulic pressure, the push rod and other equipment are adopted to achieve the purpose of blade pitch control, the design of a pitch control mechanism is complex, so the cost is relatively high, the mechanical design is complex, the failure rate is high in the operation process, the current global large fan basically adopts the technology, the pitch control technology adopts the PLC control, the pitch control action can be delayed, and the pitch control structure is adopted and a power supply is required to be provided for the system; the centrifugal force variable pitch is characterized in that an iron flying rod is arranged at the root of a blade, the blade angle is changed by the centrifugal force generated by the rotating speed of an impeller, the structure is a pure mechanical action variable pitch, the centrifugal force variable pitch can only be used for a high-rotating-speed wind driven generator, the wind driven generator is usually not beneficial to the system when the wind driven generator is operated at a low rotating speed, the centrifugal force variable pitch is a reverse pitch mode, and the change angle is very small.
Therefore, in view of the above situation, it is desirable to provide a self-torque reluctance variable pitch wind turbine to overcome the disadvantages of the current practical application.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a self-torque reluctance variable pitch wind turbine, which aims to solve the problems in the background art.
The embodiment of the invention is realized in such a way, the self-torsion magnetic resistance variable-pitch wind driven generator comprises a generator set, a generator set revolving body and a tower component, wherein the generator set is connected with the tower component through the generator set revolving body, the generator set comprises a main generator, an auxiliary variable-pitch generator, a main and auxiliary generator set motor shell and blades, the main generator comprises a main generator shaft, a main generator rotor and a main generator stator, the auxiliary variable-pitch generator comprises an auxiliary variable-pitch generator shaft, an auxiliary variable-pitch generator rotor and an auxiliary variable-pitch generator stator, the main generator shaft is arranged in the main and auxiliary generator set motor shell, a variable-pitch hub is further arranged at the shaft head of the main generator shaft, the auxiliary variable-pitch generator shaft penetrates through the main generator shaft, and a variable-pitch synchronous disc is arranged at the shaft head of the auxiliary variable-pitch generator shaft, the variable-pitch hub is provided with a first rotary bearing, a steel wire rope fixed blade connecting disc is installed on the first rotary bearing, one end of the steel wire rope fixed blade connecting disc is connected with the blades, the other end of the steel wire rope fixed blade connecting disc is wound on a steel wire rope, one end of the steel wire rope is fixed on the variable-pitch synchronizing disc, the other end of the steel wire rope is connected with a pre-tightening spring, and the steel wire rope is provided with three groups.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: under rated power, the blades drive the variable pitch hub to rotate, so that the main generator shaft and the auxiliary variable pitch generator shaft synchronously rotate to generate power together; when the wind speed is too high, the blades drive the variable-pitch hub to rotate fast, so that the power of the generator set is increased, when the auxiliary variable-pitch generator exceeds the rated power, the pretightening force of the pretightening spring is not enough to overcome the torque of the motor, the shaft of the auxiliary variable-pitch generator can deflect angularly, the deflected auxiliary variable-pitch motor shaft drives the variable-pitch synchronizing disc to pull the steel wire rope, so that the steel wire rope is driven to fix the blade connecting disc to rotate, the blades are driven to rotate synchronously and automatically for a certain angle, the windward working surface of the blades is changed, so that the rotating speed of the generator set is reduced, the power is reduced, when the auxiliary variable-pitch generator is reduced to the preset power, the blades rotate back to the blades under the action of the tension of the pretightening spring to increase the windward surface of the blades, when the torque and the spring torque reach balance, the blades do not continue to rotate, the windward surface is kept at a certain angle, the rotating speed of the generator set is maintained, and the generator set is repeatedly adjusted, thereby ensuring that the generator set is automatically controlled within a rated power range; compared with the prior art, the working action of the magnetic resistance variable pitch is to change the pitch passively in real time without delay; the self torque is utilized to change the pitch without adding other equipment; the control is simple, and the normal controller can work; according to the invention, even if the controller is broken and the generator is broken, no safety accident can be caused, and once the controller and the generator are broken, the variable pitch system can be stopped in the maximum variable pitch action, so that no safety accident can be caused, and the safety performance of the wind driven generator is effectively improved.
Drawings
FIG. 1 is an exploded view of a portion of a generator set in an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a generator set according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a main generator portion according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram a of an auxiliary generator portion according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram b of an auxiliary generator portion according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the working state of the embodiment of the present invention;
fig. 7 is a schematic diagram of a non-operating state according to an embodiment of the present invention.
In the drawings: 1-a pre-tightening spring, 2-a first rotary bearing, 3-a steel wire rope fixed blade connecting disc, 4-a variable pitch synchronous disc, 5-a variable pitch hub, 6-an auxiliary variable pitch generator shaft, 7-a generator set front cover, 8-an auxiliary variable pitch generator rotor, 9-a copper sleeve, 10-a main generator shaft, 11-a main generator rotor, 12-a main auxiliary generator set motor shell, 13-a main generator stator, 14-a generator set rear cover, 15-an auxiliary variable pitch motor rear cover, 16-a generator set revolving body, 17-a steel wire rope, 18-a steel wire rope pressing plate, 19-a blade, 20-an auxiliary variable pitch generator stator, 21-a second rotary bearing, 22-a steel wire rope lock catch, 23-a first bearing, 24-a blade positioning block, 25-second bearing, 26-hub gland, 27-tower assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Specific implementations of the present invention are described in detail below with reference to specific embodiments.
Referring to fig. 1 to 7, a self-torque reluctance variable pitch wind turbine provided in an embodiment of the present invention includes a generator set, a set revolving body 16, and a tower assembly 27, where the generator set is connected to the tower assembly 27 through the set revolving body 16, the generator set includes a main generator, an auxiliary pitch generator, a main and auxiliary generator set motor housing 12, and blades 19, the main generator includes a main generator shaft 10, a main generator rotor 11, and a main generator stator 13, the auxiliary pitch generator includes an auxiliary pitch generator shaft 6, an auxiliary pitch generator rotor 8, and an auxiliary pitch generator stator 20, the main generator shaft 10 is disposed in the main and auxiliary generator set motor housing 12, a pitch hub 5 is further disposed at a shaft head position of the main generator shaft 10, and the auxiliary pitch generator shaft 6 penetrates through the main generator shaft 10, the variable-pitch synchronous disc 4 is arranged at the shaft head position of the auxiliary variable-pitch generator shaft 6, the first rotary bearing 2 is arranged on the variable-pitch wheel hub 5, the steel wire rope fixing blade connecting disc 3 is installed on the first rotary bearing 2, one end of the steel wire rope fixing blade connecting disc 3 is connected with the blade 19, the other end of the steel wire rope fixing blade connecting disc 3 is wound on the steel wire rope 17, one end of the steel wire rope 17 is fixed on the variable-pitch synchronous disc 4, the other end of the steel wire rope 17 is connected with the pre-tightening spring 1, and three groups of steel wire ropes 17 are arranged.
In the embodiment of the invention, the power of the main generator is larger than that of the auxiliary variable-pitch generator, and the two parts of motors are relatively independent and related to each other in a mode that the auxiliary variable-pitch generator shaft 6 penetrates through the main generator shaft 10; under rated power, the blades 19 drive the variable pitch hub 5 to rotate, so that the main generator shaft 10 and the auxiliary variable pitch generator shaft 6 synchronously rotate to jointly generate electricity; when the wind speed is overlarge, the blades 19 drive the variable pitch hub 5 to rotate and accelerate, so that the power of the generator set is increased, when the auxiliary variable pitch generator exceeds the rated power, the pretightening force of the pretightening spring 1 is not enough to overcome the torque of the motor, the auxiliary variable pitch motor shaft 6 can deflect angularly, the deflected auxiliary variable pitch motor shaft 6 drives the variable pitch synchronizing disc 4 to pull the steel wire rope 17, so that the steel wire rope fixed blade connecting disc 3 is driven to rotate, the blades 19 are driven to rotate synchronously at a certain angle, the windward working surface is changed, the rotating speed of the generator set is reduced, the power is reduced, when the auxiliary variable pitch generator is reduced to the preset power, the blades 19 rotate back to themselves under the action of the tension of the pretightening spring 1, the windward surface of the blades 19 is increased, when the torque and the spring torque are balanced, the blades 19 do not rotate continuously, the windward surface is kept at a certain angle, and the rotating speed of the generator set is maintained, through repeated adjustment, the generator set is automatically controlled within a rated power range; wherein the main generator rotor 11 is fixed to the main generator shaft 10 and the auxiliary pitch generator rotor 8 is mounted on the auxiliary pitch generator shaft 6; compared with the prior art, the working action of the magnetic resistance variable pitch is to change the pitch passively in real time without delay; the self torque is utilized to change the pitch without adding other equipment; the control is simple, and the normal controller can work; according to the invention, even if the controller is broken down and the generator is broken down, no safety accident can be generated, because once the controller and the generator are broken down, the variable pitch system can stay in the maximum variable pitch action, no safety accident can be generated, and the safety performance of the wind driven generator is effectively improved.
In an embodiment of the present invention, referring to fig. 1, the variable-pitch hub 5 is of a five-way type, and three flanges for mounting the first rotary bearing 2 are uniformly distributed on the circumference of the variable-pitch hub 5.
In an embodiment of the present invention, referring to fig. 1 and 5, the steel cable 17 penetrates through the pre-tightening spring 1, and the steel cable 17 and the pre-tightening spring 1 are connected by a steel cable lock 22.
In an embodiment of the present invention, referring to fig. 1 and 5, the wire rope 17 is fixed to the connecting disc 3 of the fixed blade of the wire rope by a wire rope pressing plate 18.
In this embodiment, the wire rope pressing plate 18 can prevent the wire rope 17 from loosening from the wire rope fixed blade connecting disc 3, thereby improving the stability of the wind turbine during operation.
In an embodiment of the present invention, referring to fig. 2, a motor end cover for supporting the main generator shaft 10 is disposed in the main generator set motor casing 12, the motor end cover includes a generator set front cover 7 and a generator set rear cover 14, and the main generator shaft 10 is connected to the generator set front cover 7 and the generator set rear cover 14 through a first bearing 23.
In an embodiment of the present invention, referring to fig. 2, an auxiliary pitch-controlled motor rear cover 15 is further disposed in the main-auxiliary generator set motor casing 12, one end of the auxiliary pitch-controlled generator shaft 6 is connected to the auxiliary pitch-controlled motor rear cover 15 through a second bearing 25, and the other end of the auxiliary pitch-controlled generator shaft 6 is supported through a copper bush 9.
In one embodiment of the present invention, referring to fig. 2 and 6, the unit slewing body 16 and the tower assembly 27 are connected by a second slewing bearing 21.
In an embodiment of the present invention, please refer to fig. 3, a hub gland 26 is further disposed on the pitch hub 5.
In an embodiment of the present invention, please refer to fig. 5, further comprising a blade positioning block 24 disposed on the connecting disc 3 for fixing the blade of the steel wire rope.
In the embodiment of the invention, at the initial installation stage, the zero position of the blade 19 is determined and fixed, and then the pre-tightening spring 1 is pre-tightened according to the power of the auxiliary variable pitch generator; for example, if the power of the auxiliary pitch generator is 5KW, the rated rotational speed is 100r/min, which is given by the formula T =9549 × P/n, and T =477.5 n.m, the torque equally distributed to the three springs is about 159 n.m.
In summary, the working principle of the invention is as follows: under rated power, the blades 19 drive the variable pitch hub 5 to rotate, so that the main generator shaft 10 and the auxiliary variable pitch generator shaft 6 synchronously rotate to jointly generate electricity; when the wind speed is overlarge, the blades 19 drive the variable pitch hub 5 to rotate and accelerate, so that the power of the generator set is increased, when the auxiliary variable pitch generator exceeds the rated power, the pretightening force of the pretightening spring 1 is not enough to overcome the torque of the motor, the auxiliary variable pitch motor shaft 6 can deflect angularly, the deflected auxiliary variable pitch motor shaft 6 drives the variable pitch synchronizing disc 4 to pull the steel wire rope 17, so that the steel wire rope fixed blade connecting disc 3 is driven to rotate, the blades 19 are driven to rotate synchronously at a certain angle, the windward working surface is changed, the rotating speed of the generator set is reduced, the power is reduced, when the auxiliary variable pitch generator is reduced to the preset power, the blades 19 rotate back to themselves under the action of the tension of the pretightening spring 1, the windward surface of the blades 19 is increased, when the torque and the spring torque are balanced, the blades 19 do not rotate continuously, the windward surface is kept at a certain angle, and the rotating speed of the generator set is maintained, through repeated adjustment, the generator set is automatically controlled within a rated power range.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A self-torsion reluctance variable-pitch wind driven generator comprises a generator set, a generator set revolving body and a tower component, and is characterized in that the generator set is connected with the tower component through the generator set revolving body, the generator set comprises a main generator, an auxiliary variable-pitch generator, a main and auxiliary generator set motor shell and blades, the main generator comprises a main generator shaft, a main generator rotor and a main generator stator, the auxiliary variable-pitch generator comprises an auxiliary variable-pitch generator shaft, an auxiliary variable-pitch generator rotor and an auxiliary variable-pitch generator stator, the main generator shaft is arranged in the main and auxiliary generator set motor shell, a variable-pitch hub is further arranged at the shaft head position of the main generator shaft, the auxiliary variable-pitch generator shaft penetrates through the main generator shaft, a variable-pitch synchronous disc is arranged at the shaft head position of the auxiliary variable-pitch generator shaft, and a first rotary bearing is arranged on the variable-pitch hub, and a steel wire rope fixed blade connecting disc is installed on the first rotary bearing, one end of the steel wire rope fixed blade connecting disc is connected with the blades, the other end of the steel wire rope fixed blade connecting disc is wound on a steel wire rope, one end of the steel wire rope is fixed on the variable pitch synchronous disc, the other end of the steel wire rope is connected with a pre-tightening spring, and the steel wire rope is provided with three groups.
2. The self-torsion reluctance variable pitch wind driven generator according to claim 1, wherein the variable pitch hub is of a five-way type, and three flanges for mounting the first rotary bearing are uniformly distributed on the circumference of the variable pitch hub.
3. The self-torsion reluctance variable pitch wind driven generator according to claim 1, wherein the wire rope penetrates through the pre-tightening spring, and the wire rope and the pre-tightening spring are connected through a wire rope lock.
4. The self-torque reluctance pitch wind driven generator according to claim 1, wherein the wire rope is fixed to the wire rope fixed blade connection plate by a wire rope pressing plate.
5. The self-torsion reluctance variable pitch wind turbine according to claim 1, wherein a motor end cover for supporting a main generator shaft is arranged in the main generator set motor casing and the auxiliary generator set motor casing, the motor end cover comprises a generator set front cover and a generator set rear cover, and the main generator shaft and the generator set front cover and the generator set rear cover are connected through a first bearing.
6. The self-torsion reluctance variable pitch wind driven generator according to claim 1, wherein an auxiliary pitch motor rear cover is further arranged in the main and auxiliary generator set motor casing, one end of the auxiliary pitch motor shaft is connected with the auxiliary pitch motor rear cover through a second bearing, and the other end of the auxiliary pitch motor shaft is supported through a copper bush.
7. The self-torque reluctance pitch wind turbine according to claim 1, wherein said unit rotor and said tower assembly are connected by a second rotor bearing.
8. The self-torque reluctance pitch wind turbine according to claim 1, wherein a hub gland is further provided on the pitch hub.
9. The self-torque reluctance pitch wind turbine according to claim 1, further comprising a blade positioning block disposed on the wire rope fixed blade connection disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210292764.7A CN114704429A (en) | 2022-03-23 | 2022-03-23 | Self-torsion magnetic resistance variable-pitch wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210292764.7A CN114704429A (en) | 2022-03-23 | 2022-03-23 | Self-torsion magnetic resistance variable-pitch wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114704429A true CN114704429A (en) | 2022-07-05 |
Family
ID=82169867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210292764.7A Pending CN114704429A (en) | 2022-03-23 | 2022-03-23 | Self-torsion magnetic resistance variable-pitch wind driven generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114704429A (en) |
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2022
- 2022-03-23 CN CN202210292764.7A patent/CN114704429A/en active Pending
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