CN101705909A - Pitch system of face gear transmission in bi-blade or tri-blade small wind driven generator - Google Patents
Pitch system of face gear transmission in bi-blade or tri-blade small wind driven generator Download PDFInfo
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- CN101705909A CN101705909A CN200910234015A CN200910234015A CN101705909A CN 101705909 A CN101705909 A CN 101705909A CN 200910234015 A CN200910234015 A CN 200910234015A CN 200910234015 A CN200910234015 A CN 200910234015A CN 101705909 A CN101705909 A CN 101705909A
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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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Abstract
The invention provides a pitch system of face gear transmission in a small wind driven generator, belonging to the technical field of mechanical transmission. The pitch system takes a face gear as an input gear to drive a cylindrical gear to rotate so as to realize that the cylindrical gear drives the blades to perform variable pitch motion. The invention can solve the problems of complex mechanism of variable pitch, high fault rate, high cost and difficulty in application on the small wind driven generator, thus having obvious substantial characteristics and prominent progress.
Description
Technical field
The present invention is the gear-driven blade pitch device of face in two blades or the three blade small-sized wind power generators, is one of crucial driving mechanism of small-sized wind power generator, belongs to mechanical transmission fields.
Background technique
In recent years, along with in the world wide to the attention of environmental protection, Global Greenhouse Effect, each state all competitively development comprise wind energy renewable energy sources utilize technology, with wind energy as a kind of selection in the energy policy of sustainable development.
Wind energy is because the energy that air flows produced with quality.The gas dynamic theory of wind-driven generator is in first foundation of nineteen twenty-six by the Bei Zi of Germany (Betz).The wind wheel of Betz false wind power generator is desirable, under this perfect condition, and the intrinsic peak efficiency of wind-driven generator
η≈0.593
This explanation wind-driven generator resulting energy from natural wind is limited, and its power loss part can be interpreted as staying the rotation function in the wake flow.Therefore, the actual power coefficient C of wind-driven generator
p＜0.593.
Power coefficient C
pPhysical significance mainly refer to the energy that the wind wheel of wind-driven generator can obtain and the percentage of the contained wind energy of free air in the swept area of rotor from natural wind, promptly
In the formula: P is the output power of the actual acquisition of wind-driven generator; ρ is an air density; S is the swept area of wind wheel; V is a wind speed.
The theoretical maximal wind-energy utilization factor C of wind-driven generator
pBe 0.539, concerning the wind-driven generator that reality is used, C
pThe efficient of big more expression wind-driven generator is high more.C
pBe not a constant, it is with wind speed, wind-driven generator rotating speed and blade of wind-driven generator parameter, as pitch angle etc. and change.
Variable Pitch in the small-sized wind power generator is meant the blade that is installed on the wheel hub, can change the size of its propeller pitch angle by mechanism or control technique.In case propeller pitch angle can automatically adjust with the size of wind speed, just can capturing wind energy as much as possible, multiple, can keep stable output power in the high wind speed period again, the unlikely overload that causes induction generator can also be when wind speed surpasses cut-out wind speed prevents the damage to wind energy conversion system by the feathering state of lift (the geometry angles of attack of blade go to zero).In a word, the purpose of wind-driven generator upper blade Variable Pitch can make C by regulating pitch exactly
pUnder rated wind speed, have bigger value, thereby obtain higher output power; After surpassing rated wind speed, reduce C by changing pitch
p, output power is remained near the rating value.
At present because complex structure, rate of fault height, the cost of blade pitch device is expensive, usually only kilowatt or MW class wind turbine in use.The gear-driven blade pitch device of face mainly utilizes the face gear transmission technology to solve the problem of using blade pitch device in the small-sized wind power generator in the middle-size and small-size wind-driven generator of the present invention.
Summary of the invention
The present invention is the gear-driven blade pitch device of face in two blades or the three blade small-sized wind power generators, and the complex structure, rate of fault height, the cost that mainly solve existing blade pitch device are expensive, and the problem that can't use in small-sized wind power generator.
The gear-driven blade pitch device of face mainly can be divided into two blades and three leaf types in the small-sized wind power generator.
The gear-driven blade pitch device of face in a kind of two blade small-sized wind power generators is characterized in that:
Form by face gear, first blade promotion cylindrical gears, first sharf, second blade promotion cylindrical gears, second sharf;
Wherein first blade promotes the axis conllinear that cylindrical gears and second blade promote cylindrical gears, and and the axis and the quadrature of face gear;
Wherein first blade promotion cylindrical gears is installed on first sharf, and second blade promotes cylindrical gears and is installed on second sharf;
Wherein first blade promotes the velocity ratio i of cylindrical gears and face gear
21Velocity ratio i with second blade promotion cylindrical gears and face gear
51Equate;
The gear-driven blade pitch device of face in a kind of three blade small-sized wind power generators is characterized in that:
Form by face gear, first blade promotion cylindrical gears, first sharf, second blade promotion cylindrical gears, second sharf, the 3rd blade promotion cylindrical gears, the 3rd sharf;
Wherein first blade promotes cylindrical gears, second blade and promotes the axis that cylindrical gears and the 3rd blade promote cylindrical gears and be in the same plane, and angle each other is 120 °, and the axis of face gear is vertical with above-mentioned plane;
Wherein first blade promotion cylindrical gears is installed on first sharf, and second blade promotes cylindrical gears and is installed on second sharf, and the 3rd blade promotes cylindrical gears and is installed on the 3rd sharf;
Wherein first blade promotes the velocity ratio i of cylindrical gears and face gear
21Velocity ratio i with second blade promotion cylindrical gears and face gear
51And the 3rd blade promote the velocity ratio i of cylindrical gears and face gear
81Equate.
The present invention is simple in structure, rate of fault is low, cost is low, is applicable to small-sized wind power generator.
Description of drawings
Fig. 1 is the face gear transmission Variable Pitch mechanism principle figure of 2 blades, and wherein Fig. 1-1 is a plan view, and Fig. 1-2 is the left side partial sectional view.
Fig. 2 is the face gear transmission Variable Pitch mechanism principle figure of 3 blades, and wherein Fig. 2-1 is a plan view, and Fig. 2-2 is the local echelon sectional view in left side.
Label title among the figure: 1. a gear, 2. first blade promote cylindrical gears, 3. first sharf, 4. first blade, 5. second blade promote cylindrical gears, 6. second sharf, 7. second blade, 8. the 3rd blade promotes cylindrical gears, 9. the 3rd sharf, 10. the 3rd blade.
Embodiment
The gear-driven blade pitch device of face in the small-sized wind power generator of 2 blades of employing, as shown in Figure 1.The equipment of its formation is composed as follows:
By face gear 1 input motion, 1 while of face gear and first blade promotion cylindrical gears 2 and second blade promote cylindrical gears 5 engagements, promote first blade and promote cylindrical gears 2 and 5 rotations of second blade promotion cylindrical gears; First blade promotes cylindrical gears 2 and first blade 4 is installed on first sharf 3, and second blade promotes cylindrical gears 5 and second blade 7 is installed on second sharf 6; The rotation that promotes cylindrical gears 2 by first blade drives 4 motions of first blade, and the rotation that promotes cylindrical gears 5 by second blade drives 7 motions of second blade; The final Variable Pitch motion that realizes 2 blades.
In the installation, require first blade to promote the rotational axis of cylindrical gears 2 and the rotational axis conllinear that second blade promotes cylindrical gears 5; The rotational axis quadrature of the rotational axis of face gear 1 and above-mentioned 2 cylindrical gearss.
The gear-driven blade pitch device of face in the small-sized wind power generator of 3 blades of employing, as shown in Figure 2.The equipment of its formation is composed as follows:
By face gear 1 input motion, 1 while of face gear and first blade promotion cylindrical gears 2, second blade promote cylindrical gears 5 and 8 engagements of the 3rd blade promotion cylindrical gears, promote first blade promotion cylindrical gears 2, second blade promotion cylindrical gears 5 and the 3rd blade and promote cylindrical gears 8 rotations; First blade promotes cylindrical gears 2 and first blade 4 is installed on first sharf 3, second blade promotes cylindrical gears 5 and second blade 7 is installed on second sharf 6, and the 3rd blade promotes cylindrical gears 8 and the 3rd blade 10 is installed on the 3rd sharf 9; The rotation that promotes cylindrical gears 2 by first blade drives 4 motions of first blade, and the rotation that promotes cylindrical gears 5 by second blade drives 7 motions of second blade, and the rotation that promotes cylindrical gears 8 by the 3rd blade drives 10 motions of second blade; The final Variable Pitch motion that realizes 3 blades.
In the installation, rotational axis, second blade that requires first blade to promote cylindrical gears 2 promotes the rotational axis coplane of cylindrical gears 5 and the 3rd blade promotion cylindrical gears 8, and angle each other is 120 °; The rotational axis of face gear 1 is vertical with the plane, rotational axis place of above-mentioned 3 cylindrical gearss.
For the gear-driven Variable Pitch of realization face mechanism, must meet the following conditions:
1. for the blade pitch device of 2 blades, first blade promotes the velocity ratio i of cylindrical gears 2 and face gear 1
21Velocity ratio i with second blade promotion cylindrical gears 5 and face gear 1
51Equate, promptly
i
21＝i
51
2. for the blade pitch device of 3 blades, first blade promotes the velocity ratio i of cylindrical gears 2 and face gear 1
21Velocity ratio i with second blade promotion cylindrical gears 5 and face gear 1
51And the 3rd blade promote the velocity ratio i of cylindrical gears 8 and face gear 1
81Equate, promptly
i
21＝i
51＝i
81
Satisfy under the velocity ratio requirement condition 2 blades or the 3 gear-driven Variable Pitch mechanism design of blade face steps
1. determine the moment of torsion on single blade, calculate input torque, suppose that moment of torsion is T on single blade
D, the number of blade is n, and velocity ratio is i, and then input torque T is
T＝inT
D
2. determine gear-driven geometric parameter;
3. carry out structural design.
Embodiment one
Known input torque, getting the number of blade is 2, the face gear 1 and first blade promote the velocity ratio i of cylindrical gears 2 and second blade promotion cylindrical gears 5
12=i
15=1/3, modulus m=1, pressure angle α=20 °, the number of teeth z of face gear 1
1=51, first blade promotes the number of teeth z of cylindrical gears 2
2The number of teeth that=17, second blade promotes cylindrical gears 5 is identical with the number of teeth of cylindrical gears 2.
Embodiment two
Known input torque, getting the number of blade is 3, the face gear 1 and first blade promote the velocity ratio i that cylindrical gears 2, second blade promotion cylindrical gears 5 and the 3rd blade promote cylindrical gears 8
12=i
15=i
18=1/5, modulus m=2, pressure angle α=22.5 °, the number of teeth z of face gear 1
1=90, first blade promotes the number of teeth z of cylindrical gears 2
2It is identical with the number of teeth that first blade promotes cylindrical gears 2 with the number of teeth that the 3rd blade promotes cylindrical gears 8 that=18, second blade promotes cylindrical gears 5.
In a word, according to Fig. 1 and Fig. 2 as can be known, drive first blade by face gear 1 and promote cylindrical gears 2 and second blade and promote cylindrical gears 5 or drive first blade to promote cylindrical gears 2, second blade and promote cylindrical gears 5 and the 3rd blade and promote cylindrical gears 8 and rotate, thereby realize that first blade promotes Variable Pitch motion, second blade that cylindrical gears 2 drives first blade 4 and promotes Variable Pitch motion and the 3rd blade that cylindrical gears 5 drives first blade 7 and promote the Variable Pitch motion that cylindrical gears 8 drives the 3rd blade 10.
Claims (2)
1. the gear-driven blade pitch device of face in the blade small-sized wind power generator is characterized in that:
Form by face gear (1), first blade promotion cylindrical gears (2), first sharf (3), second blade promotion cylindrical gears (5), second sharf (6);
Wherein first blade promotes the axis conllinear that cylindrical gears (2) and second blade promote cylindrical gears (5), and with the axis and the quadrature of face gear (1);
Wherein first blade promotion cylindrical gears (2) is installed on first sharf (3), and second blade promotes cylindrical gears (5) and is installed on second sharf (6);
Wherein first blade promotes the velocity ratio i of cylindrical gears (2) and face gear (1)
21Velocity ratio i with second blade promotion cylindrical gears (5) and face gear (1)
51Equate;
2. the gear-driven blade pitch device of face in the blade small-sized wind power generator is characterized in that:
Form by face gear (1), first blade promotion cylindrical gears (2), first sharf (3), second blade promotion cylindrical gears (5), second sharf (6), the 3rd blade promotion cylindrical gears (8), the 3rd sharf (9);
Wherein first blade promotes the axis that cylindrical gears (2), second blade promote cylindrical gears (5) and the 3rd blade promotion cylindrical gears (8) and is in the same plane, and angle each other is 120 °, and the axis of face gear (1) is vertical with above-mentioned plane;
Wherein first blade promotion cylindrical gears (2) is installed on first sharf (3), and second blade promotes cylindrical gears (5) and is installed on second sharf (6), and the 3rd blade promotes cylindrical gears (8) and is installed on the 3rd sharf (9);
Wherein first blade promotes the velocity ratio i of cylindrical gears (2) and face gear (1)
21Velocity ratio i with second blade promotion cylindrical gears (5) and face gear (1)
51And the 3rd blade promote the velocity ratio i of cylindrical gears (8) and face gear (1)
81Equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234015A CN101705909A (en) | 2009-11-19 | 2009-11-19 | Pitch system of face gear transmission in bi-blade or tri-blade small wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910234015A CN101705909A (en) | 2009-11-19 | 2009-11-19 | Pitch system of face gear transmission in bi-blade or tri-blade small wind driven generator |
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| Publication Number | Publication Date |
|---|---|
| CN101705909A true CN101705909A (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910234015A Pending CN101705909A (en) | 2009-11-19 | 2009-11-19 | Pitch system of face gear transmission in bi-blade or tri-blade small wind driven generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242488A (en) * | 2019-06-25 | 2019-09-17 | 哈尔滨工程大学 | One kind being based on Magnus leading edge cylinder blade tide energy water conservancy generator |
-
2009
- 2009-11-19 CN CN200910234015A patent/CN101705909A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242488A (en) * | 2019-06-25 | 2019-09-17 | 哈尔滨工程大学 | One kind being based on Magnus leading edge cylinder blade tide energy water conservancy generator |
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Application publication date: 20100512 |