CN102734067A - Wind thrust pitch-variable mechanism - Google Patents

Wind thrust pitch-variable mechanism Download PDF

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Publication number
CN102734067A
CN102734067A CN2012102356736A CN201210235673A CN102734067A CN 102734067 A CN102734067 A CN 102734067A CN 2012102356736 A CN2012102356736 A CN 2012102356736A CN 201210235673 A CN201210235673 A CN 201210235673A CN 102734067 A CN102734067 A CN 102734067A
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China
Prior art keywords
wind
wind wheel
pitch
thrust
mandrel
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CN2012102356736A
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Chinese (zh)
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CN102734067B (en
Inventor
王国力
刘衍选
蔡晓峰
赵炳胜
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Shenyang China Creative Wind Energy Co Ltd
China Creative Wind Energy Co Ltd
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Shenyang China Creative Wind Energy Co Ltd
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Priority to CN201210235673.6A priority Critical patent/CN102734067B/en
Publication of CN102734067A publication Critical patent/CN102734067A/en
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Publication of CN102734067B publication Critical patent/CN102734067B/en
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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 relates to a wind thrust pitch-variable mechanism which belongs to the technical field of wind power generation. The wind thrust pitch-variable mechanism comprises a wind wheel spindle, a wind wheel shaft sleeve, a pitch-variable bearing, at least two sets of hydraulic thrust cylinders and a pitch-variable hydraulic drive cylinder, wherein one end of the wind wheel spindle is connected with a main shaft of an engine, and the other end of the wind wheel spindle is provided with a gland; the wind wheel shaft sleeve is sheathed on the wind wheel spindle, and an end spring is arranged between the end part of the wind wheel shaft sleeve and the gland; the pitch-variable bearing is arranged at the outside of the wind wheel spindle through a bearing pedestal, the outer circle of the pitch-variable bearing is fixed on the pitch-variable bearing pedestal, and blades are fixed on the inner circle of the pitch-variable bearing; the at least two sets of hydraulic thrust cylinders are uniformly distributed at the periphery of the wind wheel spindle after being connected in series, and are fixed on a fixed seat outside the spindle, and the end parts of the piston rods of the hydraulic thrust cylinders are connected with the end surface of the wind wheel shaft sleeve; and the pitch-variable hydraulic drive cylinder is fixed on the pitch-variable bearing pedestal through a rotatable pin, and the pitch-variable hydraulic drive cylinder and the hydraulic thrust cylinder are connected with a nonmetal hydraulic pipeline. According to the invention, the communication between the wind thrust pitch-variable mechanism and a cabin is established in no need of a hub and intervention of a manual or control system, and totally depends on wind power without extra motive power; and a slide ring is omitted in the wind thrust pitch-variable mechanism.

Description

Wind-force thrust blade pitch device
Technical field
The invention belongs to technical field of wind power generation, particularly relate to a kind of mechanism that relies on the thrust independent pitch of wind-force self generation.
Background technique
Large-scale Wind Turbines is in power control at present; General change oar form or the hydraulic vane change form that adopts motor reducer actuation gear mechanism; This blade pitch device need be placed into blade pitch device in the wheel hub, controls through electric slip ring or fluid power slip ring and cabin control system communication simultaneously.And the small-sized wind power generator group has wind wheel lateral deviation speed regulation method at present in the control of reply power, utilize impeller centrifugal force to change means such as pitch, increase blade resistance.Electronic and hydraulic vane change mechanism all need the intervention of manual work or control system just can work, and owing to adopt the slip ring structure, thus its structure with operate all more complicated.The change rower section effect that small-sized fan adopts at present is not very desirable.And traditional wind-driven generator has only utilized the effect of wind energy to blade lift, is used for generating electricity; And wind energy is not utilized the part of blade thrust.
Summary of the invention
Technical problem to above-mentioned existence; The present invention provides a kind of wind-force thrust blade pitch device; It is not need wheel hub and cabin to set up to communicate by letter, omit slip ring, does not also need manual work or control system intervention, and relies on wind-force fully and do not need the blade pitch device of extra power.
The present invention includes:
The wind wheel mandrel, an end connects generator shaft, and the other end is equipped with gland;
The rotor shaft cover is sleeved on the wind wheel mandrel, between wind wheel sleeve end and gland, is provided with the end spring;
Pitch variable bearings is installed in the wind wheel mandrel outside through its bearing support, and the outer ring of pitch variable bearings is fixed on the pitch variable bearings seat, and vanes fixed is on the inner ring of pitch variable bearings;
The thrust oil hydraulic cylinder is at least two groups, is distributed in wind wheel mandrel periphery after being connected in series, and is fixed on the fixed base in the mandrel outside, and the piston rod end of thrust oil hydraulic cylinder is connected with wind wheel axle sleeve end face;
Become oar and drive oil hydraulic cylinder, be fixed on the pitch variable bearings seat, become oar and drive between oil hydraulic cylinder and thrust oil hydraulic cylinder and be connected through nonmetal hydraulic pipe line through rotatable pin.
Said main shaft is that generator rotor shaft stretches out generator casing, and its end has the flange arrangement that is connected with the wind wheel mandrel.Perhaps, said main shaft is that an end has the flange arrangement that is connected with the wind wheel mandrel, and the other end is the structure that is connected with generator rotor shaft.
Said wind wheel mandrel one end is the flange arrangement that is connected with main shaft, and the other end has the mounting hole that is connected with gland, and mandrel axis body and wind wheel axle sleeve are connected and are partly with fin, and the wind wheel axle sleeve has the endoporus that matches with the mandrel fin.
Said thrust oil hydraulic cylinder is the oil hydraulic cylinder that band resets.Its thrust minimum value that resets is rated wind speed Vn.
Link together through the muscle structure between said mandrel and the pitch variable bearings seat.Perhaps, the hub structure through band muscle structure links together between said mandrel and the pitch variable bearings seat.
Beneficial effect of the present invention:
Adopt blade pitch device of the present invention, it does not need wheel hub and cabin to set up to communicate by letter, omit slip ring, do not need manual work or control system intervention yet, relies on wind-force fully and does not need extra power.The present invention is particularly useful for small-sized fan, and cost is lower and simple in structure.
The present invention has utilized wind energy to another effect outside the blade lift effect, and promptly thrust is come the relation at related blade pitch angle, thereby realizes utilizing wind energy power and become oar.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention.
Fig. 2 is the structural representation of Fig. 1 apoplexy wheel mandrel.
Fig. 3 is the structural representation of Fig. 1 Intermediate shaft sleeve.
Fig. 4 becomes oar driving structure schematic representation for the present invention.
Fig. 5 is a working principle schematic representation of the present invention, and wherein: figure a-figure c is the variation relation of blade each parameter value under wind, and figure d is the power curve of fan design.
Among the figure: 1, tower tube, 2, the cabin, 3, main shaft, 4, mandrel, 41, fin, 5, the thrust oil hydraulic cylinder; 51, fixed base, 6, axle sleeve, 7, become oar and drive oil hydraulic cylinder, 71, pin, 72, connecting pin, 8, blade; 9, pitch variable bearings, 10, the end face spring, 11, gland, 12, link, 13. hubs.
Embodiment
Specifically describe the present invention below in conjunction with accompanying drawing and embodiment.
Embodiment: as shown in Figure 1, the present invention includes:
Wind wheel mandrel 4, one ends connect generator shaft 3, and both connecting ends are the flange plate structure that cooperatively interacts; The other end is equipped with gland 11 through bolt; Mandrel 4 axis bodies and wind wheel axle sleeve 6 are connected and are partly with fin, are at least one (this example has four fins), are uniformly distributed along the circumference; Wind wheel mandrel 4 is the devices that function is identical with slip coupling, both can slide vertically, can transmit the moment of torsion of low speed rotation simultaneously;
Wind wheel axle sleeve 6 has the endoporus that matches with mandrel 4 fins, is sleeved on the wind wheel mandrel 4, is provided with end spring 10 in wind wheel axle sleeve 6 ends and 11 on gland, will hold spring 10 and gland 11 through being bolted on wind wheel mandrel 4 end faces;
Pitch variable bearings 9 is installed in wind wheel mandrel 4 outsides through its bearing support, and the hub structure through band muscle structure between said mandrel 4 and the pitch variable bearings seat links together; The outer ring of pitch variable bearings 9 is through being bolted on the pitch variable bearings seat, and blade 8 is through on the inner ring that is bolted to pitch variable bearings 9;
Thrust oil hydraulic cylinder 5 is oil hydraulic cylinders that band resets; Be at least two groups (this example is two groups); Be distributed in wind wheel mandrel 4 peripheries after being connected in series, be fixed on the fixed base 51 in mandrel 4 outsides, the piston rod end of thrust oil hydraulic cylinder 5 is connected with wind wheel axle sleeve 6 end faces through bolt;
Become oar and drive oil hydraulic cylinder 7; Be connected through rotatable connecting pin 72 on the hub 13 of band muscle structure; Piston rod one end that becomes oar driving oil hydraulic cylinder 7 is connected on the link 12 through another rotatable pin 71; Link 12 is fixed on the inner ring of pitch variable bearings 9, and the outer ring of pitch variable bearings 9 is fixed on the hub 13 of band muscle structure, becomes oar and drives 5 of oil hydraulic cylinder 7 and thrust oil hydraulic cylinders and be connected through nonmetal hydraulic pipe line.
Main shaft 3 described in the present invention is that generator rotor shaft stretches out generator casing, and its end has the flange arrangement that is connected with wind wheel mandrel 4.Also can adopt another kind of structure: said main shaft 3 is that an end has the flange arrangement that is connected with wind wheel mandrel 4, and the other end is for cooperating the structure that is in transmission connection with generator rotor shaft.Said thrust oil hydraulic cylinder 5 is oil hydraulic cylinders that band resets.
Working principle of the present invention:
The elasticity coefficient of the thrust oil hydraulic cylinder 5 built-in springs that band resets among the present invention and the volume of two thrust hydraulic pressure, 5 cylinders, stroke all need and the aerodynamic characteristics of blade and the propeller pitch angle scope associated design of blade pitch device of the present invention.
Shown in figure a among Fig. 5, when atmosphere and the following motion of vane airfoil profile existence, vane airfoil profile will receive the δ Q that makes a concerted effort, and δ Q is being called lift perpendicular to the component fL that comes flow path direction, is called resistance at the component fD that is parallel to come flow path direction.Thereby whole wind wheel receives air power and respectively drives the generator amature generating around the torque of wind wheel axis rotation will producing one perpendicular to the Σ fL that makes a concerted effort that comes flow path direction, and the edge come the component Σ fD of flow path direction will produce one vertically thrust and be delivered on the blower foundation through the tower tube.α is the angle of attack among the figure b, and β is a propeller pitch angle, and ω is a wind vector.Under the constant situation of propeller pitch angle β,, wind speed increases along with increasing angle of attack.For the blade of having processed; Lift fF and resistance fD are except being the function of wind speed; Be respectively the function of lift coefficient δ L and resistance coefficient δ D simultaneously; And there are the variation relation shown in figure c in δ L and δ D with angle of attack respectively, and the angle of attack that wherein δ L peak is corresponding is a critical angle of attack, visible at the following lift coefficient of critical angle of attack and resistance coefficient all along with angle of attack increase δ L, δ D all increase.Same fD is the function of wind speed and α, increases along with the wind speed and the angle of attack increase fD.Figure d is the power curve of fan design, and Vin, Vn, Vout are respectively blower fan incision, specified and cut-out wind speed.For guarantee wind speed between Vin and Vn and when continuing to increase angle of attack increase, need to keep propeller pitch angle β constant, so the thrust minimum value that resets of the thrust oil hydraulic cylinder 5 of design this moment is wind speed Vn, and propeller pitch angle is the thrust Σ fD of 0 correspondence of wind wheel when spending.When wind speed was between Vn and Vout, thrust Σ fD still was the function of wind speed and propeller pitch angle β, relation below existing between wind wheel thrust Σ fD and the thrust oil hydraulic cylinder 5 this moment: Σ fD=f (ω; β); If establish thrust oil hydraulic cylinder 5 thrust Fs=g (s, E), s is a hydraulic cylinder travel; E is an elasticity coefficient; Then Fs=Σ fD between Vn to Vout and and stroke 0 to the Sn pairing propeller pitch angle 0 of thrust oil hydraulic cylinder 5 spend when between β sn, changing and set up, and when wind speed when Vn to Vout changes, s is that the stroke 0 of thrust oil hydraulic cylinder 5 correspondences is to S n, propeller pitch angle corresponding when wind speed is tending towards Vout is Σ fD=Fs (S n, the propeller pitch angle β sn in the time of E), Σ fD when wind speed meets or exceeds Vout Out(Smax, E), drive oil hydraulic cylinder 7 pairing propeller pitch angles in the wheel hub related with the stroke of thrust oil hydraulic cylinder 50 to Smax is 0 to 90 degree to=Fs.Thrust oil hydraulic cylinder 5 can adopt complex spring structure (that is: spring different spring of elasticity coefficient in different running lengths) to satisfy the desired elasticity coefficient of different trip segment Σ fD.
Machinery action process of the present invention:
Wind wheel blade 8 is under the effect of wind-force, and after wind-force reached the incision wind speed, wind wheel began to receive thrust and lift effect; Under the lift effect, begin rotation; Increase along with wind-force increases lift, wind speed round power increases, reach rated wind speed and during less than cut-out wind speed after along with wind-force further increases; Thrust begins to drive oil hydraulic cylinder according to the function relation in the working principle of the present invention and becomes oar; Keep blower fan near rated power, to move, near the approaching excision of wind-force wind speed, this propeller pitch angle changes to a position near 90 degree with the suffered thrust of this wind speed lower blade with propeller pitch angle.

Claims (8)

1. wind-force thrust blade pitch device is characterized in that: comprising:
The wind wheel mandrel, an end connects generator shaft, and the other end is equipped with gland;
The rotor shaft cover is sleeved on the wind wheel mandrel, between wind wheel sleeve end and gland, is provided with the end spring;
Pitch variable bearings is installed in the wind wheel mandrel outside through its bearing support, and the outer ring of pitch variable bearings is fixed on the pitch variable bearings seat, and vanes fixed is on the inner ring of pitch variable bearings;
The thrust oil hydraulic cylinder is at least two groups, is distributed in wind wheel mandrel periphery after being connected in series, and is fixed on the fixed base in the mandrel outside, and the piston rod end of thrust oil hydraulic cylinder is connected with wind wheel axle sleeve end face;
Become oar and drive oil hydraulic cylinder, be fixed on the pitch variable bearings seat, become oar and drive between oil hydraulic cylinder and thrust oil hydraulic cylinder and be connected through nonmetal hydraulic pipe line through rotatable pin.
2. wind-force thrust blade pitch device according to claim 1 is characterized in that: said main shaft is that generator rotor shaft stretches out generator casing, and its end has the flange arrangement that is connected with the wind wheel mandrel.
3. wind-force thrust blade pitch device according to claim 1 is characterized in that: said main shaft is that an end has the flange arrangement that is connected with the wind wheel mandrel, and the other end is the structure that is connected with generator rotor shaft.
4. wind-force thrust blade pitch device according to claim 1; It is characterized in that: said wind wheel mandrel one end is the flange arrangement that is connected with main shaft; The other end has the mounting hole that is connected with gland; Mandrel axis body and wind wheel axle sleeve are connected and are partly with fin, and the wind wheel axle sleeve has the endoporus that matches with the mandrel fin.
5. wind-force thrust blade pitch device according to claim 1 is characterized in that: said thrust oil hydraulic cylinder is the oil hydraulic cylinder that band resets.
6. wind-force thrust blade pitch device according to claim 5 is characterized in that: the said thrust oil hydraulic cylinder thrust minimum value that resets is rated wind speed Vn.
7. wind-force thrust blade pitch device according to claim 1 is characterized in that: link together through the muscle structure between said mandrel and the pitch variable bearings seat.
8. wind-force thrust blade pitch device according to claim 1 is characterized in that: the hub structure through band muscle structure between said mandrel and the pitch variable bearings seat links together.
CN201210235673.6A 2012-07-06 2012-07-06 Wind thrust pitch-variable mechanism Expired - Fee Related CN102734067B (en)

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Application Number Priority Date Filing Date Title
CN201210235673.6A CN102734067B (en) 2012-07-06 2012-07-06 Wind thrust pitch-variable mechanism

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Application Number Priority Date Filing Date Title
CN201210235673.6A CN102734067B (en) 2012-07-06 2012-07-06 Wind thrust pitch-variable mechanism

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CN102734067B CN102734067B (en) 2014-02-12

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736250A (en) * 2016-02-26 2016-07-06 太原重工股份有限公司 Connecting structure for wind-electricity speed-up gear box and sliding ring
WO2019007105A1 (en) * 2017-07-06 2019-01-10 北京金风科创风电设备有限公司 Wind turbine blade pitch variation device, pitch variation method, pitch variation control device, and wind turbine
CN110285019A (en) * 2015-03-11 2019-09-27 利勃海尔比伯拉赫零部件有限公司 Adjust unit and the wind turbine including the adjusting unit
CN111936739A (en) * 2018-03-26 2020-11-13 利勃海尔比伯拉赫零部件有限公司 Actuator for adjusting a pitch angle of a rotor blade of a wind turbine and wind turbine having the same
US11359602B2 (en) * 2017-07-06 2022-06-14 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Pitch varying device, pitch varying method and pitch varying control device for wind turbine blade and wind turbine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555125A1 (en) * 1983-11-23 1985-05-24 Joulia Pierre DEVICE FOR AUTOMATICLY REGULATING THE STEP OF A PROPELLER
GB2371837B (en) * 2000-12-19 2004-06-30 Pro Design Solutions Ltd Pitch adjustment mechanism
AU2008262699A1 (en) * 2008-06-12 2008-12-18 Stormrider Holdings Ltd Mproved wind turbine
US20090191058A1 (en) * 2006-05-10 2009-07-30 Miller James W Torsion blade pivot windmill
CN102182638A (en) * 2011-05-16 2011-09-14 杨永新 Wind-pressure paddle change wind driven generator
CN102454549A (en) * 2010-10-27 2012-05-16 李运初 Synchronous power-driven multi-blade variable pitch wind driven generator
CN202628385U (en) * 2012-07-06 2012-12-26 沈阳华创风能有限公司 Wind-power thrust pitch control mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555125A1 (en) * 1983-11-23 1985-05-24 Joulia Pierre DEVICE FOR AUTOMATICLY REGULATING THE STEP OF A PROPELLER
GB2371837B (en) * 2000-12-19 2004-06-30 Pro Design Solutions Ltd Pitch adjustment mechanism
US20090191058A1 (en) * 2006-05-10 2009-07-30 Miller James W Torsion blade pivot windmill
AU2008262699A1 (en) * 2008-06-12 2008-12-18 Stormrider Holdings Ltd Mproved wind turbine
CN102454549A (en) * 2010-10-27 2012-05-16 李运初 Synchronous power-driven multi-blade variable pitch wind driven generator
CN102182638A (en) * 2011-05-16 2011-09-14 杨永新 Wind-pressure paddle change wind driven generator
CN202628385U (en) * 2012-07-06 2012-12-26 沈阳华创风能有限公司 Wind-power thrust pitch control mechanism

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110285019A (en) * 2015-03-11 2019-09-27 利勃海尔比伯拉赫零部件有限公司 Adjust unit and the wind turbine including the adjusting unit
CN105736250A (en) * 2016-02-26 2016-07-06 太原重工股份有限公司 Connecting structure for wind-electricity speed-up gear box and sliding ring
WO2019007105A1 (en) * 2017-07-06 2019-01-10 北京金风科创风电设备有限公司 Wind turbine blade pitch variation device, pitch variation method, pitch variation control device, and wind turbine
US11359602B2 (en) * 2017-07-06 2022-06-14 Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. Pitch varying device, pitch varying method and pitch varying control device for wind turbine blade and wind turbine
CN111936739A (en) * 2018-03-26 2020-11-13 利勃海尔比伯拉赫零部件有限公司 Actuator for adjusting a pitch angle of a rotor blade of a wind turbine and wind turbine having the same
CN111936739B (en) * 2018-03-26 2023-11-03 利勃海尔比伯拉赫零部件有限公司 Actuator for adjusting the pitch angle of a rotor blade of a wind turbine and wind turbine having such an actuator

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Granted publication date: 20140212

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