CN102322394A - A kind of blower variable-pitch system - Google Patents
A kind of blower variable-pitch system Download PDFInfo
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- CN102322394A CN102322394A CN201110293212A CN201110293212A CN102322394A CN 102322394 A CN102322394 A CN 102322394A CN 201110293212 A CN201110293212 A CN 201110293212A CN 201110293212 A CN201110293212 A CN 201110293212A CN 102322394 A CN102322394 A CN 102322394A
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- oar
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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
Abstract
The invention provides a kind of blower variable-pitch system; Be to concentrate pitch-controlled system; Comprise and become oar drive unit, synchronous transmission device and pitch variable bearings; Said pitch variable bearings is arranged on corresponding mounting blades on the hub surface, its outer ring of blower fan, and synchronous transmission device one end connects the output shaft that becomes the oar drive unit, and the other end is provided with the inner ring setting of some synchronous turning axlees, corresponding pitch variable bearings; The output shaft of said change oar drive unit and the output shaft of blower fan gear-box are provided with a clutch of often opening, and when becoming the inefficacy of oar drive unit, this clutch is closed.This blower variable-pitch system; Have favorable applicability for the high-power wind-driven generator group, it not only can accomplish the vane propeller-changing action under the blower fan normal working, can also be when fan trouble; Make blade get back to feather position reliably, guarantee the safe operation of blower fan.
Description
Technical field
The present invention relates to wind generating technology, specifically is a kind of blower variable-pitch system with Fail safe protective function.
Background technique
At present; The modal control mode of wind power generating set has constant speed to decide that oar, constant speed become oar, speed change decide four kinds of control modes such as oar and speed-changing oar-changing, and the difference between the Different control mode is mainly reflected in the different modes that blade pitch angle and motor speed are controlled.Wherein the speed-changing oar-changing control mode obtains to use widely owing to have that optimum wind energy is caught, the output of permanent power, can alleviate advantage such as blower fan load, becomes the control mode of modern high-power wind-driven generator group main flow.Its basic functional principle is to make blower fan below rated wind speed, the rotating speed of control wind wheel, and the realization blower fan is caught the peak output of wind energy; More than rated wind speed, the change vane angle of control blade is realized the control to output power, reaches the purpose of permanent power output; Under some failure condition, guarantee the rapid feathering of blade simultaneously, realize the function of aerodynamic brake.
Like Fig. 1, shown in Figure 2, in modern times in the blower fan, but each blade 4 all will have the pitch-controlled system of relatively independent coordinated, and pitch-controlled system comprises: pitch variable bearings 5, become oar land 3, become the oar drive unit and control gear constitutes.The root of each blade 4 links to each other with wheel hub through pitch variable bearings 5, and pitch variable bearings 5 directly connects the output terminal of the change oar drive unit of each blade 4, perhaps is together in parallel to connect a main transformer oar drive unit.Send change oar signal through the blower fan master control system, make the said apparatus transmission carry out action, make the change vane angle of blade 4 change, accomplish the action of change oar.Directly the performance with blower fan is relevant with safety with reliability for the efficient of pitch-controlled system, is important composition parts of blower fan.At present, the blower variable-pitch system can be divided into two types on hydraulic vane change and electric change oar according to the difference of the power resources that adopted, and both respectively have pluses and minuses.Along with electric change oar constantly embodies in the advantage that becomes aspects such as oar efficient, action response speed and reliability, what most of blower fans adopted all is electric pitch-controlled system but in recent years.
Hydraulic variable propeller system is when proper functioning; Its operation power is from oil hydraulic pump; Its basic structure is as shown in Figure 1: drive through a hydraulic vane change drive unit and control gear; Change oar land 3 through particular design again links together the pitch variable bearings 5 that is provided with of going up of all blades 4, so will work in coordination with the change oar action of accomplishing each blade 4.The hydraulic vane change drive unit is oil hydraulic cylinder 9 and piston rod 7 thereof, and control gear is an oil hydraulic pump, and piston rod 7 is terminal through becoming oar land 3 each pitch variable bearings 5 of connection, becomes the rotation motion that oar land 3 converts the straight line motion of piston rod 7 into pitch variable bearings 5.Therefore, when hydraulic variable propeller system is worked, the signal of oil hydraulic pump receiving control device; It is the proportional electromagnetic valve that hydraulic variable propeller system is regulated in master control; Piston rod 7 is done axial motion in oil hydraulic cylinder 9, the change oar land 3 in the pulling wheel hub makes that becoming oar land 3 drive pitch variable bearings 5 rotates; Thereby change the change vane angle of blade 4, make it do to become the oar motion.The hydraulic vane change work structuring is simple, and the components and parts life-span is longer, only needs oil pressure just can work; But in practical application, hydraulic variable propeller system exists problems such as leakage of oil, action response is slow, operating temperature range is limited; In addition, hydraulic oil, filter need regularly to detect, change, and hydraulic oil is prone to leak, pollute easily, and oil hydraulic pump acts frequently, and power consumption is big, noise is big.
Electric pitch-controlled system is when proper functioning; Its operation power is from mains supply; Its basic structure is as shown in Figure 2: each blade 4 becomes the oar motor through a cover and variable propeller gearbox 11 drives, and its battery rack and control cabinet 10 all are set directly at wheel hub inside, are provided with reserve battery in the battery rack; The variable propeller gearbox output terminal is through becoming the ring gear that the oar small gear connects pitch variable bearings 5, and control cabinet is through slip ring 12 and Master Communications.Therefore; When electric pitch-controlled system proper functioning, control cabinet is accepted to become the oar control signal, is sent and become oar and carry out signal to becoming oar motor and variable propeller gearbox 11, becomes the oar machine operation; Output shaft connects change oar small gear through variable propeller gearbox; Drive pitch variable bearings 5 rotations, thereby change the change vane angle of blade 4, make it do to become the oar motion.When electrical network lost efficacy, electric pitch-controlled system obtained power from reserve battery, made blade 4 be in feather position, to guarantee blower fan safety.The electric variable pitch technology maturation of electric pitch-controlled system, numerical control drive easily, and control is simple; But, its complex structure, the components and parts life-span is shorter, needs often maintenance and replacing; Must rely on electric resources such as electrical network, battery; The easy concentrated wear of the ring gear of pitch variable bearings 5 is arranged on battery rack and control cabinet 10 in the wheel hub, and each sheet blade 4 corresponding cover drive unit makes its inner maintainable space very little, with high costs.If after the outage, the reserve battery cabinet lost efficacy, and the pitch-controlled system dead electricity, made its inefficacy, can't make blade 4 featherings, when situation is serious even can cause blower fan to destroy.
On principle and structure, required vane propeller-changing action request when no matter hydraulic variable propeller system or electric pitch-controlled system can both be accomplished normal operation of blower fan and fault, but also there are some problems in its reliability.
Summary of the invention
The objective of the invention is to: a kind of safe and reliable blower variable-pitch system is provided.
The technological scheme that the present invention adopted is
A kind of blower variable-pitch system; Be to concentrate pitch-controlled system; Comprise and become oar drive unit, synchronous transmission device and pitch variable bearings; Said pitch variable bearings is arranged on corresponding mounting blades on the hub surface, its outer ring of blower fan, and synchronous transmission device one end connects the output shaft that becomes the oar drive unit, and the other end is provided with the inner ring setting of some synchronous turning axlees, corresponding pitch variable bearings; The output shaft of said change oar drive unit and the output shaft of blower fan gear-box are provided with a clutch of often opening, and when becoming the inefficacy of oar drive unit, this clutch is closed.
Said synchronous transmission device is a gear drive, comprises intermeshing driving gear and several driven gears, and driving gear rotates with the output shaft that becomes the oar drive unit synchronously, and driven gear and pitch variable bearings rotate synchronously.
Drive bevel gear of the terminal connection of the output shaft of said change oar drive unit; And this output shaft is fixedly connected perpendicular to the end face of this driving shaft gear; Be engaged with several driven wheels of differential on the drive bevel gear, and the end face of the corresponding pitch variable bearings of the end face of these driven wheels of differential is fixedly connected.
Said synchronous transmission device comprises screw mandrel, becomes the oar driveshaft and becomes the oar land that screw mandrel connects the output shaft that becomes the oar drive unit and becomes the oar driveshaft, becomes oar driveshaft end and becomes the setting of oar land perpendicular to this, the hinged pitch variable bearings of this change oar land.
Said change oar drive unit is to become the oar motor.
Said clutch is provided with the limit switch at corresponding vane propeller-changing angle.
The beneficial effect that the present invention produced is:
The present invention is directed to hydraulic variable propeller system and electric pitch-controlled system when fan trouble, existence can't make the problem of the reliable feathering of blade, has proposed a kind of blower variable-pitch system.This blower variable-pitch system; Has favorable applicability for the high-power wind-driven generator group; The wind power generating set of multiple power level can be applied to, under the situation that satisfies the requirement of normal change oar, the Security of wind power generating set under failure conditions can be improved effectively.It not only can accomplish the vane propeller-changing action under the blower fan normal working, can also when fan trouble, make blade get back to feather position reliably, guarantees the safe operation of blower fan.
Two kinds of specific constructive form of the present invention have following advantage compared to hydraulic variable propeller system and electric pitch-controlled system:
1. the reserve power of pitch-controlled system when fan trouble is directed to blower fan Transmitted chains itself, has formed power loop, need not extra reserve power, has improved the reliability of pitch-controlled system under the fan trouble situation;
2. belong to Mechanical & Electrical Transmission, efficient is high, does not have hydraulic pressure leakage of oil problem;
3. be applicable to the change oar actuator in the speed-changing oar-changing wind power generating set with concentrated variable blade control system.
Description of drawings
Fig. 1 is the structural representation of the hydraulic variable propeller system of existing technology blower fan;
Fig. 2 is the structural representation of the electric pitch-controlled system of existing technology blower fan;
Fig. 3 is first kind of structural representation of pitch-controlled system of the present invention;
Fig. 4 is second kind of structural representation of pitch-controlled system of the present invention.
Label is represented among the figure: 1-coupling, 2-gearbox output shaft, 3-become oar land, 4-blade, 5-pitch variable bearings, 6-main shaft, 7-piston rod, 8-gear-box, 9-oil hydraulic cylinder, 10-battery rack and electric control cubicle, 11-becomes the oar motor and gear-box, 12-slip ring, 13-bevel gear, 14-become oar live axle, 15-clutch, 16-change oar motor, 17-change oar driveshaft, 18-screw mandrel.
Embodiment
Like Fig. 3, shown in Figure 4, the present invention is an a kind of blower variable-pitch system, is to concentrate pitch-controlled system, comprises becoming oar drive unit, synchronous transmission device and pitch variable bearings 5.In this embodiment; Becoming oar driving dress is to become oar motor 16; Pitch variable bearings 5 is arranged on corresponding mounting blades 4 on the hub surface, its outer ring of blower fan; Synchronous transmission device one end connects the output shaft that becomes oar motor 16, and the other end is provided with the inner ring setting of some synchronous turning axlees, corresponding pitch variable bearings 5.The output shaft of this change oar motor 16 and gearbox output shaft 2 are provided with a clutch of often opening 15, when becoming 16 inefficacies of oar motor, and these clutch 15 closures.
Synchronous transmission device has two kinds of concrete structural forms:
As shown in Figure 3; The synchronous transmission device of first kind of structural type is a gear drive; Comprise intermeshing driving gear and several driven gears, driving gear rotates with the output shaft that becomes the oar drive unit synchronously, and driven gear and pitch variable bearings 5 rotate synchronously.In this embodiment: the output shaft that becomes oar motor 16 connects a change oar live axle 14 through coupling 1, and this change oar live axle 14 runs through the two ends of gear-box 8.Bevel gear 13 that end is connected with and it rotates synchronously of change oar live axle 14, this bevel gear 13 is provided with, is socketed on change oar live axle 14 side faces perpendicular to becoming oar live axle 14.Be engaged with the bevel gear 13 of several driven rotations on the bevel gear 13 of this active rotation, and the end face fixed connection of the corresponding pitch variable bearings 5 of the end face of these driven wheels of differential 13, make both rotate synchronously.
It should be noted that: be provided with a clutch of often opening 15 becoming between oar live axle 14 and the gearbox output shaft 2, when becoming oar motor 16 and lost efficacy, this clutch 15 closures, by gearbox output shaft 2 driving blower variable-pitch systems.And clutch 15 is provided with the limit switch that corresponding blade 4 becomes vane angle.
The working method of the blower variable-pitch system of this concrete structure is:
When blower fan normally moved, clutch 15 broke off, and the blower variable-pitch system drives change oar live axle 14 by becoming oar motor 16, and the rotation of actuation gear transmission device drives pitch variable bearings 5 and rotates, and realizes the change oar of blade 4.
When blower fan breaks down,, or become situation such as oar motor 16 breaks down like electric network power-fail; Blade 4 is smoothly during feathering, and clutch 15 closures make the dynamic branch of gearbox output shaft 2 to becoming oar live axle 14; Thereby drive transmission system and pitch variable bearings 5 successively, realize the action of feathering.Surpass the change vane angle that allows for fear of feathering action, in clutch 15, be designed with corresponding limit switch, after reaching feather position, clutch 15 can automatic disconnection, cuts off gearbox output shaft 2 to the power that becomes oar live axle 14.
The key of this pitch-controlled system is clutch 15, and it provides a kind of fail safe mechanism for fan trouble, promptly as long as wind wheel, just can guarantee reliably feathering of blower fan also in rotation; And when wind wheel stops the rotation, can blower fan is regarded as being in a safe condition.In addition, the action of fail safe clutch 15 conflicts with the mechanical brake of high speed shaft action nothing each other, can work together.
As shown in Figure 4, the synchronous transmission device of second kind of structural type comprises screw mandrel 18, becomes oar driveshaft 17 and becomes oar land 3.Screw mandrel 18 connects the output shaft that becomes oar motors 16 and becomes oar driveshaft 17, and the rotation motion of the output shaft that becomes oar motor 16 is converted into the axial linear movement that becomes oar driveshaft 17.Become oar driveshaft 17 ends and become 3 settings of oar land perpendicular to this, this becomes oar land 3 hinged pitch variable bearings 5.In this embodiment; The structure of synchronous transmission device and hydraulic variable propeller system are very similar; Wherein: on motion state; Become oar driveshaft 17 and be equivalent to piston rod 7, only become oar driveshaft 17 and be to connect and become that oar motors 16 drive, piston rod 7 is that hydraulic pump drive is arranged through screw mandrel 18; The structure of the change oar land 3 in the wheel hub is the same with hydraulic variable propeller system especially with Placement, here with regard to numerous stating no longer.
It should be noted that: be provided with a clutch of often opening 15 becoming between oar driveshaft 17 and the gearbox output shaft 2, when becoming oar motor 16 and lost efficacy, this clutch 15 closures, by gearbox output shaft 2 driving blower variable-pitch systems.And clutch 15 is provided with the limit switch that corresponding blade 4 becomes vane angle.
The working method of the blower variable-pitch system of this concrete structure is:
In normal working, become oar motor 16 and drive screw mandrel 18 rotations, pulling becomes oar driveshaft 17 and seesaws, and makes blade 4 become the oar action, and this moment, screw mandrel 18 and gearbox output shaft 2 were thrown off, and gear-box 8 outputting powers do not drive the motion that becomes oar driveshaft 17.
When electric network power-fail occurring, or become situation such as oar motor 16 breaks down, gearbox output shaft 2 drives screw mandrels 18 and rotates, and drives to become oar driveshaft 17 and seesaw, and guarantees the feathering action of blade 4, and become the 16 unpowered outputs of oar motor this moment, is in idling conditions.
This pitch-controlled system provides a kind of fail safe mechanism equally, and owing to do not adopt bevel gear drive secondary, makes whole pitch-controlled system structure obtain simplifying, and has improved reliability.
Claims (6)
1. blower variable-pitch system; Be to concentrate pitch-controlled system; Comprise and become oar drive unit, synchronous transmission device and pitch variable bearings; Said pitch variable bearings is arranged on corresponding mounting blades on the hub surface, its outer ring of blower fan, and synchronous transmission device one end connects the output shaft that becomes the oar drive unit, and the other end is provided with the inner ring setting of some synchronous turning axlees, corresponding pitch variable bearings; It is characterized in that: the output shaft of said change oar drive unit and the output shaft of blower fan gear-box are provided with a clutch of often opening, and when becoming the inefficacy of oar drive unit, this clutch is closed.
2. blower variable-pitch according to claim 1 system; It is characterized in that: said synchronous transmission device is a gear drive; Comprise intermeshing driving gear and several driven gears; Driving gear rotates with the output shaft that becomes the oar drive unit synchronously, and driven gear and pitch variable bearings rotate synchronously.
3. blower variable-pitch according to claim 2 system; It is characterized in that: drive bevel gear of the terminal connection of the output shaft of said change oar drive unit; And this output shaft is fixedly connected perpendicular to the end face of this driving shaft gear; Be engaged with several driven wheels of differential on the drive bevel gear, and the end face of the corresponding pitch variable bearings of the end face of these driven wheels of differential is fixedly connected.
4. blower variable-pitch according to claim 1 system; It is characterized in that: said synchronous transmission device comprises screw mandrel, becomes the oar driveshaft and becomes the oar land; Screw mandrel connects the output shaft and change oar driveshaft that becomes the oar drive unit; Become oar driveshaft end and become the setting of oar land perpendicular to this, this becomes the hinged pitch variable bearings of oar land.
5. blower variable-pitch according to claim 1 system is characterized in that: said change oar drive unit is to become the oar motor.
6. blower variable-pitch according to claim 1 system, it is characterized in that: said clutch is provided with the limit switch at corresponding vane propeller-changing angle.
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| CN201110293212A CN102322394A (en) | 2011-09-30 | 2011-09-30 | A kind of blower variable-pitch system |
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| CN201110293212A CN102322394A (en) | 2011-09-30 | 2011-09-30 | A kind of blower variable-pitch system |
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| CN102322394A true CN102322394A (en) | 2012-01-18 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536653A (en) * | 2012-01-19 | 2012-07-04 | 沈阳工业大学自控技术研究所 | Variable pitch system belonging to independent variable pitch wind generating set and having protection function |
| CN102562452A (en) * | 2012-01-19 | 2012-07-11 | 沈阳工业大学自控技术研究所 | Pitch-varying system for synchronous variable-pitch wind generating set with protection function |
| CN103184974A (en) * | 2013-03-29 | 2013-07-03 | 北京天诚同创电气有限公司 | Power-frequency feathering variable-pitch system for inertial energy storage |
| CN105190026A (en) * | 2013-03-11 | 2015-12-23 | 伊林工程服务公司 | Wind turbine control system |
| CN107061145A (en) * | 2017-06-05 | 2017-08-18 | 哈尔滨工程大学 | Wave of the sea energy wind-energy collecting device |
| CN107905947A (en) * | 2017-11-02 | 2018-04-13 | 江苏燕山光伏设备有限公司 | A kind of solar wind force composite type power generator |
| CN108999744A (en) * | 2018-08-14 | 2018-12-14 | 南京信息工程大学 | A kind of teaching type wind-driven generator pitching linkage mechanism |
| CN110925136A (en) * | 2019-12-07 | 2020-03-27 | 潍坊工程职业学院 | Safe feathering device of wind turbine generator system |
| CN112796940A (en) * | 2021-01-29 | 2021-05-14 | 东方电气风电有限公司 | Wind alignment method for wind direction data missing fan |
| CN113323803A (en) * | 2021-05-12 | 2021-08-31 | 东方电气风电有限公司 | Variable pitch bearing detection method based on dynamic control of fan |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536653B (en) * | 2012-01-19 | 2013-07-24 | 沈阳工业大学自控技术研究所 | Variable pitch system belonging to independent variable pitch wind generating set |
| CN102562452A (en) * | 2012-01-19 | 2012-07-11 | 沈阳工业大学自控技术研究所 | Pitch-varying system for synchronous variable-pitch wind generating set with protection function |
| CN102536653A (en) * | 2012-01-19 | 2012-07-04 | 沈阳工业大学自控技术研究所 | Variable pitch system belonging to independent variable pitch wind generating set and having protection function |
| US10428792B2 (en) | 2013-03-11 | 2019-10-01 | Illing Engineering Services | Wind turbine control system |
| CN105190026A (en) * | 2013-03-11 | 2015-12-23 | 伊林工程服务公司 | Wind turbine control system |
| CN105190026B (en) * | 2013-03-11 | 2018-11-20 | 伊林工程服务公司 | wind turbine control system |
| CN103184974A (en) * | 2013-03-29 | 2013-07-03 | 北京天诚同创电气有限公司 | Power-frequency feathering variable-pitch system for inertial energy storage |
| CN107061145A (en) * | 2017-06-05 | 2017-08-18 | 哈尔滨工程大学 | Wave of the sea energy wind-energy collecting device |
| CN107905947A (en) * | 2017-11-02 | 2018-04-13 | 江苏燕山光伏设备有限公司 | A kind of solar wind force composite type power generator |
| CN108999744A (en) * | 2018-08-14 | 2018-12-14 | 南京信息工程大学 | A kind of teaching type wind-driven generator pitching linkage mechanism |
| CN110925136A (en) * | 2019-12-07 | 2020-03-27 | 潍坊工程职业学院 | Safe feathering device of wind turbine generator system |
| CN112796940A (en) * | 2021-01-29 | 2021-05-14 | 东方电气风电有限公司 | Wind alignment method for wind direction data missing fan |
| CN112796940B (en) * | 2021-01-29 | 2022-05-24 | 东方电气风电股份有限公司 | Wind alignment method for wind direction data missing fan |
| CN113323803A (en) * | 2021-05-12 | 2021-08-31 | 东方电气风电有限公司 | Variable pitch bearing detection method based on dynamic control of fan |
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