CN101806280B - Wind power generation device non self-locking speed change and speed-increasing gearbox - Google Patents

Abstract

The invention discloses a wind power generation device speed-increasing gearbox, in particular to a wind power generation device non self-locking speed change and speed-increasing gearbox. The wind power generation device non self-locking speed change and speed-increasing gearbox comprises a speed change and speed-increasing gearbox and a control system thereof and is characterized in that the gear meshing of the speed change and speed-increasing gearbox is in non self-locking meshing, the speed change and speed-increasing gearbox adopts gearbox stepped speed changing and comprises a planetary gear speed change and speed-increasing gearbox and a dead-axle eight-grade speed change and speed-increasing gearbox, and the control system of the speed change and speed-increasing gearbox is a speed-change automatic control system. The wind power generation device has no self-locking speed change and speed-increasing gearbox, the speed-increasing gearbox speed increasing ratio is above 200 so as to widen the velocity space of a wind generating set. The speed-increasing gearbox adopts stepped speed change technology, reduces the energy loss of the power generation device, improves wind power generation device efficiency, saves investment, fully utilizes wind power resource and improves investment rate of return.

Description

A kind of wind power generation device non self-locking speed change and speed-increasing gearbox

(1) technical field

The present invention relates to a kind of wind generating unit step-up gear, particularly a kind of wind power generation device non self-locking speed change and speed-increasing gearbox.

(2) background technique

Wind generating unit is because of wind speed is not high, the rotating speed of wind wheel is also low at present, and its working speed scope is 15 to 30 rev/mins generally speaking, and the rated speed of generator is than higher; It generally is 3000,1500 or 1000 rev/mins; Pass to generator intermediate demand speeder from the motion of wind wheel, the device that generally adopts at present is a step-up gear, because there is friction in the flank of tooth of gear engagement; Speed increasing ratio is big will to produce self-locking; Because the gear engagement locking phenomenon is limit, the speed increasing ratio of step-up gear all below 100 generally is about 60 at present.Such gear up is compared to that its rotor diameter of middle-size and small-size electricity generating device is little, and wind speed round is higher, can about 25 rev/mins, work, and also can only adopt 1500 rev/mins of generators of 4 utmost points, and the 3000 rev/mins of generators in lower-cost the two poles of the earth can not adopt.For large-sized wind-driven generator, because rotor diameter is big, tip speed is big; The requirement wind wheel can be in slow-speed of revolution work, present medium-and-large-sized wind generating unit, and low speed is 15 rev/mins of work; Adopt 1000 rev/mins generator still can satisfy, along with the development of technology, the capacity of wind generating unit also increases day by day; Rotor diameter increases day by day, and the wind wheel working speed also is tending towards reducing.The speed increasing ratio that can reach with present gear speedup case can not satisfy.The wind wheel of the wind generating unit of 5MW need adopt 1500 rev/mins lower generator of relative cost 10 rev/mins of work, and it is not enough that the speed increasing ratio of gear-box has been felt; And the capacity of wind generating unit for the not enough wind generating unit of gear-box speed increasing ratio, adopts frequency modulation technology in full to solve also in development at present; It is characterized in that a kind ofly connecting the frequency conversion system back-to-back that two groups of power converters are formed by DC link, the frequency that generator provides by wind wheel press the mains frequency frequency conversion and is imported electrical network in generating; Thereby it is not enough to have overcome the gear-box speed increasing ratio, however the wind power generating set of this technological scheme under the low frequency state, move, needs employing number of poles is more; Volume is bigger, the generator that cost is higher, and this is to need many one times number of poles because generator will reduce by 1/2 frequency; Many one times windings are used one times of copper material more, and motor volume also doubles; Motor cost also doubles, and is equivalent to many generators with a MW level, and this obviously is disadvantageous with regard to high wind generating unit for original investment relatively; Yet in order to reach same purpose; The gear-box speed increasing ratio doubles even twice also just increases a pair of gear and an axle, the cost increase seldom, this compares with a MW level generator is inappreciable.

The existing technology step-up gear all is a not speed change of a kind of fixedly speed increasing ratio, adopts the double speed generator system also to have only two-stage.The rotation speed change of the generator of wind generating unit is very little, and the wind speed of wind field alters a great deal, and theoretical according to Wind Power Utilization: power coefficient Cp is the function of wind energy conversion system tip speed ratio λ, and λ is a wind speed and the ratio of wind speed round:

$\mathrm{\λ}=\frac{2\mathrm{\πnR}}{v}$

In the formula; N is a wind speed round, and R is the wind wheel radius, and V is a upper reaches wind speed, to concrete wind wheel; λ has optimum value, and λ is when the best, and power coefficient Cp has maximum, and λ equals constant; The wind speed V of wind field has become, and the rotation speed n of wind wheel is constant, and power coefficient will reduce; Wind energy is the cube of wind speed, and the loss of velocity of existing technology wind generating unit causes that energy loss is very big, single speed wind generating unit energy loss 50%; The wind generating unit energy loss 33% of double speed generator, device efficiency is very low, and the investment utilization ratio is very low.

(3) summary of the invention

The present invention provides a kind of wind power generation device non self-locking speed change and speed-increasing gearbox that improves wind energy utilization in order to remedy the defective of existing technology.

The present invention realizes through following technological scheme:

A kind of wind power generation device non self-locking speed change and speed-increasing gearbox; Comprise speed change and speed-increasing gearbox and control system thereof; It is characterized in that: the gear engagement of speed change and speed-increasing gearbox is no self-locking engagement; Speed change and speed-increasing gearbox adopts the gear-box stepped gearing, and speed change and speed-increasing gearbox comprises planetary gear speed-changing step-up gear and eight grades of speed change and speed-increasing gearboxes of dead axle, and the control system of speed change and speed-increasing gearbox is the speed change automatic control system.

This wind power generation device non self-locking speed change and speed-increasing gearbox, the Outside radius of the driven gear of speed change and speed-increasing gearbox is less than or equal to the driven gear Pitch radius; The classification rotating speed common ratio of speed change and speed-increasing gearbox is a geometrical progression, and dividing progression is 1,2,4,8 or 16; The planetary gear speed-changing step-up gear is formed reverse geometry through planetary pinion X and planetary pinion Y; Realize speed change through conversion bearing wheel internal gear; The influence generator of eight grades of speed change and speed-increasing gearboxes of dead axle and a revolutional slip 10% is complementary; Realize speed governing in full, the low speed partial design of eight grades of speed change and speed-increasing gearboxes of dead axle is three shunting drive mechanisms, and the variable part is equipped with hydraulic coupling; The speed change automatic control system is made up of the measuring wind speed appearance, controller, hydraulic station, speed change and speed-increasing gearbox, tachometer of measuring, generator and the warning circuit that are connected.

1, one of technical solution problem of the present invention is: a kind of gear speedup case design proposal that meshes no self-locking is provided; With the speed increasing ratio of step-up gear from bringing up to below 100 more than 200; Thereby widen for the speed limit of wind generating technology; Two pole generators at a low price can be adopted for Pump for Medium and Small Power Generating Set, and, 4 pole generators of relative low price can be adopted for large-scale unit.

Two intermeshing involute gears; Its basic circle tangent line altogether is a line of contact; The line of 2 Gear center points and the intersection point of line of contact are nodes, and normal gear engagement is begun by the tooth root of driving gear and the tooth top of driven gear; The contact points of two gear teeth faces contacts is shifted to a side of nearly driven gear through node from nearly driving gear one side along line of contact, to the tooth top of driving gear with till the tooth root of driven gear contacts.Begin to be referred to as engaged section before the node from engagement, from the node to the terminating point, be referred to as engaged section behind the node to node, discover node before engaged section flank of tooth friction velocity forward; Thereby produce frictional force backward, produce the rub-moment opposite, can produce locking phenomenon with driving moment; Increase thereby limited the gear transmission speed increasing ratio, and lower efficiency and enlarge noise, when contact points has arrived node; Friction velocity is that zero rub-moment also is zero, has crossed node and has got into engaged section behind the node, friction velocity switching-over; Become backward, produce friction forward, produce the power-assist rub-moment identical with driving moment; This moment does not produce self-locking, only transmission efficiency is exerted an influence.The present invention adopts the measure of gear modification according to this result of study, meshes behind the node of the no self-locking of realization.

Since gear engagement contacts beginning from the tooth top of driving gear tooth root and driven gear; After this starting point just is located at node or node; The work Root radius of driving gear is exactly the Pitch radius more than or equal to it so; In like manner the Outside radius of driven gear just is less than or equal to the Pitch radius of driven gear; The work root circle of gear is difficult for defining, and the defining clearly of top circle, and therefore gear engagement of the present invention does not have the self-locking technical specifications and is: the Outside radius of driven gear is less than or equal to the Pitch radius of this gear.The gear of technical specifications designs according to this when the number of teeth may produce the overlap coefficient deficiency very little the time, can adopt helical gear to supply.

Gear according to above technological part bar design does not produce the engagement self-locking, thereby gear-driven speed increasing ratio breaks through existingly below 100 and reach more than 200, satisfies the required scope of wind power generating set.Enlarged the speed development space to wind generating technology,, can adopt 3000 rev/mins of generators, can adopt more slow-revving wind wheel, also need not to adopt the generator of multipole more low frequency for large-scale and super-huge unit for Pump for Medium and Small Power Generating Set.

2, two of technical solution problem of the present invention be: a kind of gear-box of stepped gearing speedup is provided, thereby improves the wind energy utilization of wind generating unit, specify as follows:

Wind generating unit is in service, and the rotation speed change of generator is very little, and the wind field change of wind velocity is very big; Wind generating unit is generally in wind speed 2.5 to 3 meter per seconds incisions, cuts out to 28 meter per seconds at 25 meters, in this wind speed section; Wind wheel is 15 to 30 rev/mins of work, and perfect condition is a wind wheel in this speed range velocity variations and changing with the wind, through speed changer at random generator is passed in motion; The wind generating unit of existing technology has only a kind of speed; This just produces loss of velocity, and the loss of energy just, the present invention adopt automatic stepped gearing gear-box to solve this technical problem; Geometrical progression according to the grading machinery transmission is theoretical, and the representation that the adjacent classification rotating speed common ratio of two-stage is up and down counted Φ and loss of velocity Δ V is following:

E is the branch progression of classification transmission in the formula, and E is a positive integer, and for ease of automatic control, E should be two-symbol; Be 2 multiple, Z=1,2,4; 8 and 16, Rn is the speed range of device, and the rotating speed of the wind generating unit of existing technology is by 15 to 30 rev/mins, its speed range Rn=30/15=2.The present invention adopts technique scheme, and the result is listed in the table below:

Rotating speed divides progression E and loss of velocity Δ V table

From the visible design technology project that the invention provides a wind generating unit speed change speedup box series of last table; Can actual requirement adopt different branch progression E according to the amount of capacity of wind generating unit; In speed range Rn, confirm rotating speed common ratio Φ; Make that the wind generating unit loss of velocity designed is minimum, device most effective, return rate is higher.

3, three of technical solution problem of the present invention be: a kind of step-up gear automatic speed-changing system by wind speed control is provided, explains as follows:

Wind generating unit is on very high tower bar, and staff can not reach, control automatically, and the present invention provides one by the measuring wind speed appearance, and control computer is carried out solenoid valve, hydraulic coupling and automatic control system that tachometer of measuring is formed.The measuring wind speed appearance records the signal of wind speed, the input controller, and controller amplifies signal processing by a certain wind speed that presets, and will be switched on or switched off some two-position four-way solenoid valve, makes the hydraulic coupling work of a certain shelves.After speed change is accomplished, also be that tachometer of measuring is installed on the generator shaft, record data-signal and feed back to by setting program relatively that accomplish if gearbox fails to connect the instruction of controller, then controller will be reported to the police to controller by the output shaft of gear-box.

The invention has the beneficial effects as follows: this wind power generation device non self-locking speed change and speed-increasing gearbox; The step-up gear speed increasing ratio is reached more than 200, thereby widened the velocity space of wind power generating set, adopt the stepped gearing technology; Reduced the energy loss of electricity generating device; Improve wind generating unit efficient, not only practiced thrift investment but also fill part and utilize wind resource, improved rate of return on investment.

(4) description of drawings

Below in conjunction with accompanying drawing the present invention is further described.

Fig. 1 is the gradually schematic diagram of the no self-locking technical specifications of line gear engagement of the present invention.

Fig. 2 is that the present invention does not have self-locking two stage speed change speedup epicyclic gearbox kinematic scheme.

Fig. 3 is that the present invention does not have three shuntings of eight grades of speed change speedups of self-locking gearbox drive system diagram.

Fig. 4 is the structural representation of non self-locking speed change and speed-increasing gearbox of the present invention.

Fig. 5 is the C-C cross-sectional schematic of Fig. 4.

Fig. 6 is the D-D cross-sectional schematic of Fig. 4.

Fig. 7 is the speed change automatic control system block diagram of gear-box of the present invention.

Among the figure, A driving gear, B driven gear, ω _aDriving gear angular velocity, ω _bDriven gear angular velocity, R _aDriving gear engagement radius, R _OaThe driving gear Base radius, α _aThe driving gear working pressure angle, R _bDriven gear engagement radius, R _ObThe driven gear Base radius, R _JbThe driven gear Pitch radius, α _bThe ip angle of driven gear, j node, P contact points, K _aDriving gear basic circle point of contact, K _bDriven gear basic circle point of contact, α _jThe node working pressure angle, F _aDriving force, F _mFriction, V _aDriving gear contact points linear velocity, V _bDriven gear contact points linear velocity, V _TaDriving gear contact points linear velocity flank of tooth component, V _TbDriven gear contact points linear velocity flank of tooth component, V _mFriction velocity, Φ classification rotating speed common ratio, E divides progression, 1,21 input shafts; 11,43 output shafts, 32,35,41 hydraulic couplinges, 13,14 oil cylinders, 2 planet carriers; 7,8,22 internal gears, 5 planetary pinion X, 6 planetary pinion Y, 3,4,9,10,11,22,23,24,25,26,27,28,29,30,31,33,34,36,37,38,39,40,42 stud wheels; 51,52,53,54,55,56 oil circuits, 61 measuring wind speed appearance, 62 warning circuits, 63 controllers; 64 hydraulic stations, 65 speed change and speed-increasing gearboxes, 66 tachometer of measuring, 67 generators.

(5) embodiment

Accompanying drawing is a kind of specific embodiment of the present invention.This wind power generation device non self-locking speed change and speed-increasing gearbox; Comprise speed change and speed-increasing gearbox and control system thereof; It is characterized in that: the gear engagement of speed change and speed-increasing gearbox is no self-locking engagement, and the Outside radius of the driven gear B of speed change and speed-increasing gearbox is less than or equal to driven gear Pitch radius R _JbSpeed change and speed-increasing gearbox adopts the gear-box stepped gearing; Speed change and speed-increasing gearbox comprises planetary gear speed-changing step-up gear and eight grades of speed change and speed-increasing gearboxes of dead axle; The control system of eight grades of speed change and speed-increasing gearboxes of dead axle is the speed change automatic control system, and the classification rotating speed common ratio Φ of speed change and speed-increasing gearbox is a geometrical progression, and dividing progression E is 1,2,4,8 or 16; The planetary gear speed-changing step-up gear is formed reverse geometry through planetary pinion X5 and planetary pinion Y6; Realize speed change through conversion bearing wheel internal gear 7,8; The influence generator of eight grades of speed change and speed-increasing gearboxes of dead axle and a revolutional slip 10% is complementary; Realize speed governing in full, the low speed partial design of eight grades of speed change and speed-increasing gearboxes of dead axle is three shunting drive mechanisms, and the variable part is equipped with hydraulic coupling; The speed change automatic control system is made up of the measuring wind speed appearance 61 that is connected, controller 63, hydraulic station 64, speed change and speed-increasing gearbox 65, tachometer of measuring 66, generator 67 and 62 of warning circuits.

Numbering is following with the gear number of teeth table of comparisons among the figure

Number among the figure	?3	4	5	6	7	8	9	10	11	22	23	24	25	26
															The gear number of teeth	?100	35	49	51	150	149	50	50	50	144	36	80	84	40

Number among the figure	27	28	29	30	31	33	34	36	37	38	39	40	42
															The gear number of teeth	88	85	88	42	38	41	85	74	37	48	43	83	38

Specify below in conjunction with accompanying drawing:

Among Fig. 1:

Line of contact is from K _aTo K _b, from K _aPoint is the preceding engaged section of node to the j point, from the j point to K _bPoint is an engaged section behind the node, and contact points P is from K under the limit case _aBegin to K _bPoint gearing stops.Speed among the figure has following representation:

V _m＝V _tb-V _ta＝R _bω _bSinα _b-R _aω _aSinα _a

＝R _obω _btonα _b-R _o1ω ₁tanα _a

＝R _obω _b(tanα _b-tanα _a)

Friction velocity V _mNibble an angle α with two flank of tooth _b, α _aRelevant, engaged section α before node _bGreater than α _aSo, V _mBe positive, forward, so friction F _mBe backward, produce friction braking moment M _xBe friction F _mWith the arm of force

Product.

$M_x=F_m\stackrel{\‾}{P{K}_b}$

Under limit case:

$\stackrel{\‾}{K_a{K}_b}=(R_{\mathrm{ja}}+R_{\mathrm{jb}}){\mathrm{Sin\α}}_j$

$\stackrel{\‾}{{\mathrm{PK}}_b}=\stackrel{\‾}{K_a{K}_b}=(R_{\mathrm{ja}}+R_{\mathrm{jb}}){\tan \mathrm{\α}}_j$

Maximum friction braking moment M under limit case _Xmax=F _m(R _Ja+ R _Jb) Sin α _j

When contact points P arrives node, α _b=α _a=α _j, V _m=0, engaged section after nibbling a P to have crossed node j entering node, α _bLess than α _a, friction velocity V _mBecome negative, friction velocity V _mBackward, so friction F _mProduce power-assist moment M forward, _y, be friction F _mWith arm of force PK _bProduct.

$M_y=F_m\stackrel{\‾}{{\mathrm{PK}}_b}$

Maximum power-assist moment is that the arm of force is maximum, PK _b=jK _b=R _jSinx _j, My does not produce self-locking, only reduces transmission efficiency, thus wouldn't study, as braking moment M _xBig arriving and drive square F _aR _ObWhen equating, gear drive will be from lock.

F _aR _o2＝M _xmax＝F _m(R _ja+R _jb)sinα _j

Friction equals driving force F _aTake advantage of friction ractor f, F _m=F _af

F _aR _o2＝F _af(R _ja+R _jb)tanα _j

Because R ₀₁/ R ₀₂Equal speed increasing ratio i,

$i=\frac{1}{f{\tan \mathrm{\α}}_j}-1$

From improving speedup i, α _jShould not increase, adopt α _j=α ₀=20 °.Then have:

i＝2.75/f-1

Friction ractor f is relevant with gear teeth face roughness and lubrication state, roll flute Tooth polishing back tooth-face roughness can reach 0.2 to 0.1, and friction ractor f can reach 0.03 to 0.02, and the theoretical maximum self-locking speed increasing ratio i of gear-box _Max90 to 130, consider that safety should be away from latching point, the speedup i of wind generating unit step-up gear at present adopts 50 to 70.

With manufacturing process reduce friction ractor, oneself is very little for the speed increasing ratio increased space.The present invention makes a breakthrough from mesh theory, avoids engagement before the node, and meshes after adopting node, and a pair of gear engagement is by the beginning that contacts with the tooth top of driven gear B of the work tooth root of driving gear A.Contact points P arrives node j along nibbling line, and friction velocity is zero, and rub-moment Mx is zero, is decided to be the engagement starting point to node j or node j later on so, at this driving gear work root radius more than or equal to driving gear Pitch radius R _Ja, and the tip circle radius of driven gear is less than or equal to driven gear Pitch radius R _Jb, the work tooth root of gear be difficult for defining and Outside radius clearly, no self-locking engagement technical specifications therefore of the present invention are: the Outside radius of driven gear B is less than or equal to the Pitch radius R of this gear _JbThe top circle of driven gear B is fixed, and modification coefficient can be tried to achieve, and the parameter of driving gear A is also fixed.

Among Fig. 2:

1) all gears do not have the design of self-locking technical specifications by the present invention, and promptly the Outside radius of driven gear is less than or equal to the Pitch radius of this gear, thereby can be so that speed increasing ratio can reach more than 200.

2) this programme is three center planetary gear mechanisms, forms reverse geometry because of taking planetary pinion X5 and planetary pinion Y6, makes speed increasing ratio very big.

3) the present technique scheme is the two-stage speed change, in epicyclic gear system through conversion bearing wheel internal gear 7,8 respectively participation work realize speed change.Oil cylinder 13 and 14 is by two-position four-way solenoid valve control, and when oil cylinder 13 was oil-filled, oil cylinder 14 was return, and internal gear 8 pins also works, and internal gear 7 freely dallies; When oil cylinder 14 oil-filled; Oil cylinder 13 is return, and internal gear 7 pins and works, internal gear 8 idle running; The number of teeth of internal gear 8 is 149; Then the speed increasing ratio of gear-box is 150, and internal gear 7 numbers of teeth are 150, and then the speed increasing ratio of gear-box is 200; Rotating speed common ratio Φ=1.33, than 4 utmost points, 6 utmost point double speed generators more near

The present technique scheme can replace expensive double speed generator, and more even better than double speed generator, because the present technique scheme can be designed to multiple different double speeds ratio with design.The double speed generator is limit by number of poles then.

Among Fig. 3:

1) all gear designs by no condition of self-locking of the present invention, so speed increasing ratio reaches 200.The minimum wind-powered electricity generation unit at 15 rev/mins of wind wheel working speed can adopt cheapest 2 pole generators, for super-huge unit, adopts 4 relatively low pole generators of price, can adopt more slow-revving wind wheel.

2) the rotating speed common ratio of present technique scheme is Φ=1.104, and loss of velocity Δ V=9.4% adopts the influence generator of 10% revolutional slip to be complementary, and has realized speed governing in full, and loss of velocity will equal zero.Wind energy has been brought into play maximum utility.Compare with the single speed wind power generating set, one is pushed up two, has practiced thrift investment, has made full use of wind energy resources.

3) present technique scheme adopts three shunting drive mechanisms at the input end of gear-box, and the low speed heavy duty one that the wind wheel main shaft is transmitted is divided into three, and module can correspondingly reduce to 69%, and mechanism size reduces, and overcomes because of the dead axle structure to bring the big shortcoming of size.

Among Fig. 4:

Its kinematic scheme is Fig. 3, and whole gears of gear-box mesh no self-locking technical specifications design by the present invention, and the Outside radius of driven gear B equals the Pitch radius of self.The gear-box forward part of present technique scheme is main speedup part, adopts three shunt structures, and its speed increasing ratio is 16.The rear portion is divided into gearbox, and its speed increasing ratio is 12.5, and total speed increasing ratio is 100 to 200, between centers speed increasing ratio 2.32, rotating speed common ratio Φ=1.104 of gear.This structure also can be by other desired parameters designs.

The wind wheel motion of main shaft via tooth 22,23,24,26,25,30, improves 16 times with rotating speed from input shaft 21 inputs, realizes speed changing function by the variable part again.

The variable part is to send the oil circuit that command signal connects corresponding hydraulic coupling for the two-position four-way solenoid valve of hydraulic station by controller 63, makes corresponding working gear and produces speed change, its speed change program such as following table:

Eight grades of speed change programs

Annotate: signal " 0 " table breaks off, and " 1 " expression is connected

Among Fig. 7:

The speed change automatic control system is by measuring wind speed appearance 61, controller 63, hydraulic station 64, speed change and speed-increasing gearbox 65, tachometer of measuring 66, generator 67 and 62 compositions of warning circuit.Measuring wind speed appearance 61 records the wind field wind speed, and parameter signal is imported controller 63, and controller 63 is handled wind velocity signal and amplified; Be switched on or switched off to certain two-position four-way solenoid electric valve of hydraulic station 64 command signal by preestablishing a certain wind speed; Make through oil circuit some or several hydraulic coupling work in the gear-box to produce speed change, reach the required rotating speed of generator; On generator shaft, be provided with tachometer of measuring 66; Record the generator speed parameter signal and feed back to controller 63 and preset program relatively, if fail to accomplish the instruction of control because of the system failure, then controller 63 is reported to the police through warning circuit 62.

This wind power generation device non self-locking speed change and speed-increasing gearbox adopts the kinematic scheme of Fig. 3 and the structural representation of Fig. 4, and this is three shuntings of eight grades of speed changes step-up gear, its rotating speed model R _n=2, rotating speed common ratio Φ=1.104, optimum technical performance is to have realized speed governing in full and according to the automatic speed changing of wind field wind speed.Present technique scheme gear-box front end is main speedup part, adopts three shunting transmissions, and the low-speed heave-load one that wind wheel is transmitted is divided into three; Make module reduce 30%; Shunting returns the back rotating speed and increases 16 times, and gear stress is reduced to 1/12, and driving force is apart from reducing to 1/16; It is many to make that the gear-box size reduces, and cost also reduces much.The rear portion of gear is a gearbox, in order to improve functional reliability and to reduce and impact, adopts hydraulic friction clutches to implement speed change, because this clutch transmits moment is bigger, is convenient to control and stable working.

Realize speed governing in full, the present technique scheme must be complementary and could accomplish with bending moment system and the induction generating of revolutional slip more than 10%.The inertia of wind wheel is very big, be the rotating speed of wind wheel difficulty very by level sudden change, and actual wind speed round is continuous gradation, when wind wheel from low one-level rotation speed n ₁To high one-level rotation speed n ₂During transition, generator speed also improves thereupon, in order to obtain the maximal wind-energy utilization factor.Measuring wind speed appearance 61 keeps into constant wind speed round with controller 63 control variable-moment unit; Control the rotor current of generator simultaneously; Make generator adapt to rotating speed and improving that when bringing up to 9.4%, the wind speed that the speed change of gear-box is given the phase arrives; Controller 63 instruction tooth case speed changes are controlled the rotor current reduction of generator and the rotating speed of generator simultaneously and are got back to the synchronous speed running.Actual wind speed round has at this moment reached n ₂, wind wheel does not impact, and just the rotating speed of generator is toward downward modulation, and the generator that runs out of steam is reduction of speed automatically also, and the impulse force of speed change is also very little, so the speed change reliable operation.Program improves with wind speed gradually according to this, and gear-box changes to the top gear position to speed, and generator is in the fully loaded work of rated power, and the speed-regulating function in full of gear-box is also with regard to corresponding completion.

Claims (4)

1. wind power generation device non self-locking speed change and speed-increasing gearbox; Comprise speed change and speed-increasing gearbox and control system thereof; It is characterized in that: the gear engagement of speed change and speed-increasing gearbox is no self-locking engagement; Speed change and speed-increasing gearbox adopts the gear-box stepped gearing, and speed change and speed-increasing gearbox comprises planetary gear speed-changing step-up gear and eight grades of speed change and speed-increasing gearboxes of dead axle, and the control system of speed change and speed-increasing gearbox is the speed change automatic control system; The planetary gear speed-changing step-up gear is formed reverse geometry through planetary pinion X (5) and planetary pinion Y (6); Realize speed change through conversion bearing wheel internal gear (7,8), the influence generator of eight grades of speed change and speed-increasing gearboxes of dead axle and a revolutional slip 10% is complementary, and realizes speed governing in full; The low speed partial design of eight grades of speed change and speed-increasing gearboxes of dead axle is three shunting drive mechanisms, and the variable part is equipped with hydraulic coupling.

2. wind power generation device non self-locking speed change and speed-increasing gearbox according to claim 1 is characterized in that: the Outside radius of the driven gear of speed change and speed-increasing gearbox (B) is less than or equal to driven gear Pitch radius (R _Jb).

3. wind power generation device non self-locking speed change and speed-increasing gearbox according to claim 1 is characterized in that: the classification rotating speed common ratio (Φ) of speed change and speed-increasing gearbox is a geometrical progression, and dividing progression (E) is 1,2,4,8 or 16.

4. wind power generation device non self-locking speed change and speed-increasing gearbox according to claim 1 is characterized in that: the speed change automatic control system is made up of the measuring wind speed appearance (61) that is connected, controller (63), hydraulic station (64), speed change and speed-increasing gearbox (65), tachometer of measuring (66), generator (67) and warning circuit (62).

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