CN206694188U - Mix suspending air gap adjusting type fan yaw device - Google Patents

Abstract

The utility model discloses a kind of mix suspending air gap adjusting type fan yaw device applied to big-and-middle-sized Wind turbines; including three parts such as cabin rotary body, compound pylon and driftage drivings, suspension air gap can be achieved and the adjustable driftage of driftage load torque dynamic is protected to wind and lateral deviation.Cabin rotary body includes cabin, engine room foundation, permanent magnet band and internal tooth speed governing circle and formed, and coordinates compound pylon and driftage driving to complete cabin and suspend and go off course to wind.Compound pylon includes suspension support body and pylon two parts, has track ring band in suspension support body, arrangement corresponding with magnet ring band, and the common suspension repulsion that produces realizes that cabin suspends, while provides torque excitation for driftage driving.Driftage driving includes go off course rotating disk, rotation central axis, driving wheel and power transmission shaft wheel, produces driftage torque, no-load voltage ratio driving cabin driftage.The utility model greatly reduces the mechanical constraint that cabin suspends and gone off course, and dynamic changes driftage torque, and it is stable to improve cabin suspension driftage.

Description

Mix suspending air gap adjusting type fan yaw device

Technical field

A kind of mix suspending air gap adjusting type fan yaw device is the utility model is related to, it is especially a kind of applied to big-and-middle Type wind power system, the Wind energy extraction device that low power consumption driftage is protected to wind and lateral deviation can be achieved, can especially realize suspension air gap The driftage that adjustable driftage load torque changes is to wind.

Background technology

Wind-power electricity generation is as a kind of new energy, it has also become the center of gravity of countries in the world energy strategy.Fan yaw device is wind Group of motors key component, its function for fan blade all the time windward and more than rated power when lateral deviation protection, improve wind Group of motors captures power and aerogenerator unit safe is stable.

Conventional wind generating yaw device typically uses more motor multi-gear coupling techniques, and gearratio is even up to 10000 More than, have that complicated, fault rate is high and the problems such as to wind low precision, and especially larger frictional dissipation make it that blower fan is inclined Power consumption of navigating is larger, influences the effective power output of blower fan.Patent of invention 200910161406.7 discloses a kind of magnetic suspension driftage Device, the device use magnetic suspension actuation techniques, and it is in cabin to greatly reduce driftage fault rate and maintenance cost, fan yaw Suspend and carry out completely, greatly reduce the friction torque caused by cabin gravity；Because fan engine room often operates in 40m high towers On frame, tilting moment caused by fan blade easily causes the centre-of gravity shift of fan engine room and toppled, and longitudinal direction friction is still larger, The larger nacelle weight of blower fan make it that flywheel moment is larger simultaneously, still very big to magnetic suspension yaw motor power requirement, but by Suspended in cabin and yaw motor shares air-gap field, yaw motor maximum electromagnetic torque is limited by cabin suspension air gap, often made Blower fan can not realize that the driftage under the big driftage fluctuation of load is protected to wind and lateral deviation.Patent of invention 201410143297.7 discloses A kind of mechanical couplings formula magnetic suspension fan yaw system, the system are reduced inclined caused by cabin rubs using magnetic levitation technology Boat power consumption, blower fan capture machine torque is directly decomposed into process auxiliary drive yaw motor with reference to mechanical coupling techniques, greatly reduced Electromagnetic torque needed for magnetic suspension yaw motor, partly solves restriction relation between yaw motor torque and suspension air gap.But Cabin suspends and yaw motor air-gap flux shares problem and still existed, and particularly fan yaw is in the nature the big negative of yaw motor Carry and start, larger starting current easily causes cabin suspension air gap to fluctuate, while the fluctuation of During yaw wind speed also easily causes Driftage rotating speed and air gap fluctuation, even result in concussion, unstability and shutdown that blower fan integrally needs, have a strong impact on wind-power electricity generation system The safe operation of system.

Utility model content

Technical assignment of the present utility model is for deficiency present in above-mentioned technology, there is provided a kind of yaw motor air gap perseverance Fixed, the flexible adjustable mix suspending air gap adjustable type fan yaw device of cabin suspension air gap.

The technical scheme in the invention for solving the above technical problem is：Mix suspending air gap adjusting type fan yaw Device, its feature include cabin rotary body, compound pylon and driftage driving three parts, and dynamic adjusts suspension air gap and driftage turns Square, realize that cabin driftage is protected to wind and lateral deviation.The cabin rotary body is cabin, engine room foundation, magnet ring band and interior Tooth speed governing circle rigid unitary structure, compound pylon and the common cabin of completing of driftage driving is coordinated to suspend and go off course to wind.It is described Compound pylon is collectively constituted by suspension support body and pylon, and for the cabin that supports or suspend, the suspension support body includes cylindrical Annulus, track ring band, interior annular band, outer toroid band, for inclined under the cabin support under non-suspended state and zero suspension air gap Boat guiding, 8 pressure sensors of the outer toroid with the embedding symmetric arrays in upper surface, detection cabin is to compound pylon pressure, control Without suspension air gap suspension stator current；Track ring band upper end embeds stator winding, respectively by the electricity corresponding with magnet ring band Magnetic windings in series is formed, and stator winding is powered by suspension current transformer, is cooperateed with together with magnet ring band and is become air gap suspension cabin；It is interior Annulus carries the transmission axis of three shaft centre line angles, 120 degree of symmetric arrays, fixed conveyor axle wheel rotation position, realizes transmission Torque fixes changable driving；It is described driftage driving be embedded in suspension support body, by driftage rotating disk, driftage axis, driving wheel with Power transmission shaft wheel is collectively constituted, and the driftage rotating disk embeds three-phase symmetric winding, and driftage electromagnetism is produced under stator winding cooperation and is turned Square, and realize voltage ratio control driving cabin driftage.

The engine room foundation is to be arranged on cabin bottom and is that goalpost formula is drawn with the rigidly connected annular solid of cabin, lower surface Guide post groove on lead ring band, with compound pylon outer toroid band, collaboration guiding cabin driftage, supports cabin；The magnet ring band It is to be made up of eight pairs of N poles and the extremely staggered permanent magnet circle ring bands of S, installed in engine room foundation inside lower end, with track ring band Corresponding arrangement, and inner side rigid attachment internal tooth speed governing circle, the internal tooth speed governing circle and 3 symmetrical power transmission shaft wheel mechanical couplings Close, suspension repulsion, driving internal tooth speed governing circle and power transmission shaft wheel axial dipole field, machine are produced between magnet ring band and stator winding annulus Cabin is suspended completely, and no-load voltage ratio transmission driftage torque, driving cabin rotation are fixed between internal tooth speed governing gear ring and power transmission shaft wheel.

The compound pylon supports for the pylon of upper end hollow disc body, and the corresponding collaboration support cabin of engine room foundation；Institute It is suspension support body to state hollow disc body, and upper surface is sequentially arranged outer toroid band, track ring band and interior annular band, described cylindrical Guide post groove is provided with annulus, roller is set on the inside of post groove, reduces cabin driftage longitudinal direction friction under zero suspension air gap；The suspension The driftage rotating disk of driftage driving is placed inside supporter, shielding external magnetic field is to driftage torque flux coupling.The suspension unsteady flow Device is two-phase H bridge current transformers, and stator levitating current changes the sense of current and size by H bridges current transformer, is produced with magnet ring band The adjustable electromagnetic force of size and Orientation, stable suspersion cabin.

The embedded three-phase symmetric winding of the driftage rotating disk is powered by the two-way PWM converter of three-phase, driftage center of turntable with Driftage axis is rigidly connected, it is ensured that driftage torque air gap is constant；Driftage axis upper end is rigidly connected with driving wheel, passes through driving wheel Engage with power transmission shaft wheel and engaged via internal tooth speed governing circle, transmit yawing step by step.

Beneficial effect is caused by the utility model：

1) cabin rotary body, compound pylon and driftage driving are received and are integrated simultaneously organic coupling, effectively drop by the utility model Restriction relation between low cabin suspension air gap and driftage electromagnetic torque, solve the small suspension air gap of blower fan and can not go off course and ask Topic, suspension power consumption and driftage power consumption are greatly reduced, improves wind energy utilization.

2) the utility model can realize that the cabin rotary body driftage under no suspension air gap is protected to wind and lateral deviation, and via outstanding The floating sense of current and size change the introducing of regulation and control driftage load torque, particularly goalpost annulus and guide post groove, are greatly improved The safety and reliability that blower fan fan yaw is protected to wind and lateral deviation.

3) the utility model goes off course cabin and driftage driving is effectively decoupled, and reduces fluctuations in wind speed to driftage rotating speed control Influence, faster driftage driving response speed can effectively reduce the influence that cabin suspends to driftage driving, greatly reduce The difficulty of cabin driftage rotating speed control.

Brief description of the drawings

Fig. 1 mix suspending air gap adjusting type fan yaw device basic block diagrams.

Fig. 2 cabin rotary body upward views.

Fig. 3 cabin suspension support body top views.

Fig. 4 guide post slot cross-section figures.

The current transformer control schematic diagrams of Fig. 5 two.

Fig. 6 mix suspending air gap adjusting type fan yaw devices control machine is charted.

1. fan blade in figure, 2. generator shafts, 3. generators, 4. cabin rotary bodies, 5. anemoclinographs, 6. cabin bottoms Seat, 7. goalpost formula guided rings bands, 8. magnet ring bands, 9. internal tooth speed governing circles, 10. power transmission shaft wheels, 11. driving wheels, in 12. driftages Axle, 13. transmission axis, 14. pressure sensors, 15. guide post grooves, 16. track ring bands, 17. three-phase windings, 18. driftage rotating disks, 19. outer toroid band, 20. pylons, 21. column rollers, 22.H bridge current transformers, 23. two-way PWM converters, 23. interior annular bands.

Embodiment

The utility model is further illustrated with reference to the accompanying drawings and examples.

The suspension air gap adjusting type fan yaw device that the utility model is announced, including cabin rotary body 4, compound pylon Trinity structure is driven with driftage.Wherein cabin rotary body 4 includes fan blade 1, generator shaft 2, generator 3, wind speed and wind To instrument 5, engine room foundation 6, goalpost formula guided rings band 7, magnet ring band 8, internal tooth speed governing circle 9；Compound pylon includes suspension support Body 19, track ring band 16, transmission axis 13, pressure sensor 14, guide post groove 15, pylon 20, column roller 21；Driftage driving Including power transmission shaft wheel 10, driving wheel 11, driftage axis 12, three-phase symmetric winding 17, driftage rotating disk 18.

The mix suspending air gap adjusting type fan yaw device working mechanism that the utility model is announced is as shown in figure 5, cabin Driftage is completed in the case where cabin rotary body, compound pylon and driftage drive cooperation, compound pylon stator winding 16 and cabin Rotary body magnet ring 8 produces suspension repulsion, and driving cabin suspends, and with power transmission shaft wheel 10 axial displacement occurs for internal tooth speed governing circle 9, Cabin suspends, and rotating disk 18 of now going off course is passed through three-phase alternating current, the rotation driving driftage of driftage rotating disk 18.Fan engine room driftage can divide Land and terminate for system initialization, data acquisition calculating, driftage judgement, the preparation that suspends, cabin suspension, cabin driftage, cabin, Realize that cabin becomes air gap and suspends driftage to wind and lateral deviation protection.

1) data acquisition.DSP28035 as main control unit, gather in real time wind speed, yaw angle θ, driftage rotational speed omega, Suspension air gap δ, cabin rotary body pressure F, receive the generated output power P for coming from cabin Wind turbines controlling transmission_w；

2) driftage judges.Fan yaw mainly realizes blower fan front windward, or carries out lateral deviation protection to generator, it is ensured that Generated output power is less than its rated power, and driftage condition includes yaw angle θ and generated output power P_w..Work as wind speed Anemoscope 5 detects yaw angle θ ＞ θ_minMinimum yaw angle, or generated output power P_w>P_NWind turbines rated power, Blower fan meets driftage condition；

3) suspend and prepare.Because the quality that cabin rotary body is larger, floating velocity, suspended state and yawing velocity etc. are tight Ghost image rings wind power system security, and must be suspended and gone off course before being suspended for this cabin preparation.According to the yaw angle of collection And pressure sensor 14 calculates the suspending power of fan yaw load torque and cabin rotary body respectively, it is outstanding to provide stator winding 16 Floating electric current.With reference to driftage load torque and stator winding levitating current, cabin driftage three-phase current is calculated, thereby judges blower fan Driftage state, driftage or cabin suspend lower go off course under no suspension air gap.

4) cabin suspends.Cabin, which suspends, to be included without suspension air gap and fixed suspension air gap δ_refDeng two kinds of suspended states.Wherein It is mainly used in reducing cabin rotary body due to pressure frictional dissipation without suspension air gap state, adjustment levitating current is used to regulate and control to go off course Load torque, H bridges current transformer 22 are powered to stator winding 16, and current regulation is real based on the control of cabin rotary body pressure closed loop Existing, the levitating current in stator winding 16 cooperates with magnet ring band 8 produces suspension repulsion, and it is negative to change the driftage of cabin rotary body Set torque；It is based on fixed suspension air gap δ that fixed suspension air gap cabin, which suspends,_refClosed-loop control and realize, H bridge current transformers 22 are passed through the levitating current of stator winding 16, and magnet ring band 8 produces suspension repulsion in stator winding 16 and cabin rotary body, rises With power transmission shaft wheel 10 axial displacement occurs for floating cabin rotary body, internal tooth speed governing circle 9, and cabin rotary body gradually disengages compound pylon branch Support, suspension air gap δ Step wise approximations fix suspension air gap δ_ref, until meeting condition | δ-δ_ref|≤δ_min, wherein δ_minTo be most stingy Gap deviation.

5) cabin is gone off course.Cabin driftage, which exists to go off course and fix under suspension air gap without cabin under suspension air gap, goes off course, according to Driftage purpose can be divided into driftage and protect two kinds to wind and lateral deviation again.Without driftage under suspension air gap obtained based on pressure sensor 14 Compound pylon pressure, dynamic regulation driftage load torque, the electric current of 18 three-phase symmetric winding of driftage rotating disk 17 are based on driftage rotating disk What speed closed loop control was realized, the rotary yaw in the case where goalpost formula guided rings band 7 and guide post groove 15 guide of cabin rotary body 4；Gu Determine cabin under suspension air gap to go off course, be that H bridges current transformer 22 and the Collaborative Control electric current of two-way PWM converter 23 are completed, cabin suspends After stable, start two-way PWM converter 23 and be passed through three-phase symmetrical alternating current to three-phase symmetric winding 17, three-phase symmetric winding 17 exists Under the effect of the excitation of track ring band 16, driftage rotating disk 18 produces electromagnetic torque, and electromagnetic torque is transferred to driving wheel by driftage axis 12 11, driving wheel 11 then engages with power transmission shaft wheel 10, and then drives internal tooth speed governing circle 9, final to drive the driftage of cabin rotary body to wind Or lateral deviation protection, thus the big torque of the slow-speed of revolution in the small torque of high rotating speed to cabin rotary body of completion driftage rotating disk 18 is efficient Conversion, finally realize that cabin driftage is protected to wind or crosswind.

6) cabin is landed.When anemoclinograph 5 detects yaw angle θ≤θ_minOr P_w=P_N, cabin driftage terminates, two-way PWM converter 23 stops powering to three-phase symmetric winding 17 first, then regulates and controls the electric current of H bridges current transformer 22, makes cabin suspension gas Gap or compound pylon pressure are progressively decreased to 0, finally support cabin by suspension support body 19, and cabin driftage terminates.

It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model Within enclosing.

Claims (3)

1. A kind of 1. mix suspending air gap adjusting type fan yaw device applied to big-and-middle-sized Wind turbines, it is characterized in that including machine Cabin rotary body, compound pylon and driftage driving three parts；The cabin rotary body be cabin, engine room foundation, magnet ring band with And internal tooth speed governing circle rigid unitary structure, coordinate compound pylon and the common cabin of completing of driftage driving to suspend and go off course to wind； The compound pylon is collectively constituted by suspension support body and pylon, and for the cabin that supports or suspend, the suspension support body includes Outer toroid band, track ring band, interior annular band, 8 pressure sensors of the outer toroid with the embedding symmetric arrays in upper surface, detect cabin To compound pylon pressure；Track ring band upper end embeds stator winding, and stator winding current is powered by H bridges current transformer, with permanent magnet Annulus cooperates with together becomes air gap suspension cabin；Interior annular carries the transmission axis of three shaft centre line angles, 120 degree of symmetric arrays, Fixed conveyor axle wheel rotation position；The driftage driving is embedded in suspension support body, by driftage rotating disk, driftage axis, active Wheel collectively constitutes with power transmission shaft wheel, and the driftage rotating disk embeds three-phase symmetric winding, and driftage electricity is produced under stator winding cooperation Magnetic torque.
2. 2. mix suspending air gap adjusting type fan yaw device according to claim 1, it is characterized in that the engine room foundation For cabin bottom and with the rigidly connected annular solid of cabin, lower surface is goalpost formula guided rings band, with compound pylon outer toroid band Upper guide post groove, collaboration guiding cabin driftage；The magnet ring band is by eight pairs of N poles and the extremely staggered permanent magnet circles of S Annulus is formed, installed in engine room foundation inside lower end, arrangement corresponding with track ring band, and inner side rigid attachment internal tooth speed governing circle； The internal tooth speed governing circle and 3 symmetrical power transmission shaft wheel mechanical couplings, are produced between magnet ring band and stator winding annulus Suspension repulsion, driving internal tooth speed governing circle realize that cabin rotary body suspends with power transmission shaft wheel axial dipole field, internal tooth speed governing gear ring and biography The fixed no-load voltage ratio transmission driftage torque of moving axis wheel collaboration, the rotary body driftage of driving cabin.
3. 3. mix suspending air gap adjusting type fan yaw device according to claim 1, it is characterized in that the compound pylon For the pylon support that upper end is hollow disc body, and the corresponding collaboration support cabin of engine room foundation；The hollow disc body is suspension Supporter, upper surface are sequentially arranged outer toroid band, track ring band and interior annular band；Guide post is provided with the outer toroid band Groove, post groove inner side set roller, reduce longitudinal direction friction when cabin rotary body is gone off course under no suspension air gap；The suspension support body The driftage rotating disk of driftage driving is placed in inside, and shielding external magnetic field is to driftage torque flux coupling；What the driftage rotating disk embedded Three-phase symmetric winding is powered by the two-way PWM converter of three-phase, and driftage center of turntable is rigidly connected with driftage axis, it is ensured that driftage turns Square air gap is constant；Driftage axis upper end is rigidly connected with driving wheel, is engaged by driving wheel with power transmission shaft wheel and via internal tooth Speed governing circle engages, and transmits yawing step by step.