CN1719025A

CN1719025A - Split type permanent magnet synchronous wind driven electric generator

Info

Publication number: CN1719025A
Application number: CNA2005100440375A
Authority: CN
Inventors: 陈亦栋; 张其智
Original assignee: WEIFANG ZHONGYUN MACHINE CO Ltd
Current assignee: WEIFANG ZHONGYUN MACHINE CO Ltd
Priority date: 2005-07-14
Filing date: 2005-07-14
Publication date: 2006-01-11

Abstract

The invention relates to a sectional permasyn wind-driven generator which consists of a tower, a gyrorotor connected on the top of the tower via a bearing in the inner cavity of the engine compartment, a stator stand and a central shaft jointed firmly on the gyrorotor a turntable communicated with the central shaft via the bearing, a rotor housing jointed firmly on the turntable, a vane fixed on the turntable via a hub, the uniform distributed stator core inlaid on the peripheral surface of the stator stand, a triphase coil winding on the stator core and a permanent-magnet inlaid on the inner ring surface of the rotor housing. There is an air-gap between the permanent-magnet and the stator core. The stator stand and rotor housing are separated. At least two sections are assembled together via the bolt and the internal screw cylindrical pin.

Description

Split type permanent magnet synchronous wind generator

Technical field

The present invention relates to a kind of wind-driven generator, a kind of split type permanent magnet synchronous wind generator of more specifically saying so.

Background technique

Present high-power grid type wind-driven generator mainly is to adopt synchronous generator, induction generator, double speed induction generator or double-fed asynchronous generator, and the whole generating machine is an integral body, and external shape is streamline.

When adopting synchronous generator, require the rotating speed of wind energy conversion system very stable, for this reason, must adopt baroque speed regulator to keep the invariablenes turning speed of wind energy conversion system automatically, this just makes the whole wind power generation device become very complicated.

Adopt synchronous generator or various induction generator no matter be, its common drawback is: 1, will drive raising speed mechanism by blade, drive generator for electricity generation by raising speed mechanism, and raising speed mechanism is bulky, and the phenomenons such as leakage of oil, damage tooth, damage casing that occur through regular meeting in service are in case above-mentioned phenomenon occurs, evaporating, emitting, dripping or leaking of liquid or gas gently then takes place, befouling environment, heavy then shutdown maintenance can not be generated electricity; 2, generating efficiency is very low when hanging down wind speed, can not make full use of wind energy again when high wind speed; Noise is big when 3, moving.

Along with continuous advancement in technology, the single-machine capacity of high-power grid type wind-driven generator is increasing, its volume is then increasing, weight is more and more heavier, again because the whole generating machine is an integral body, must use superhuge means of transportation and crane gear just to transport and install, both increase cost, and brought many inconvenience for again transportation and installation.

Fusiform external shape is because its turbulent flow and wake flow are less, therefore when wind-force affacts on the fan blade, active force to the whole wind power generator almost is unidirectional, when running into the strong wind sky, the folk prescription that is born on the pylon can be very big to active force, poor stability.

Summary of the invention

The purpose of this invention is to provide a kind of simple in structure, be convenient to transport and the split type permanent magnet synchronous wind generator of installation, grid type.

In order to realize above-mentioned purpose, the split type permanent magnet synchronous wind generator that is provided, comprise pylon, the upper end of pylon is connected to solid of rotation by bearing, solid of rotation is fixed in the inner chamber in cabin, on solid of rotation, be connected with stator support and central shaft, be connected to rotating disk by bearing on the central shaft, be connected with rotor case on the rotating disk, the blade end of rotor case is streamlined, be connected with blade by wheel hub on the rotating disk, on the circumferential surface of stator support, be inlaid with equally distributed stator iron core, be wound with the three-phase coil winding on the stator iron core, be inlaid with equally distributed permanent-magnet at rotor case corresponding to the anchor ring inboard at stator iron core and three-phase coil winding position, leave air gap between permanent-magnet and the stator iron core, its structural feature is that stator support and rotor case all are respectively splits, the quantity of its split is two bodies at least, is assembled into one with bolt and cylindrical pin with internal thread between the split.

The split quantity of above-mentioned stator support and rotor case can be identical, also can be inequality.

The back segment in above-mentioned cabin is the hemisphere hull shape.

Split type permanent magnet synchronous wind generator provided by the present invention, be directly to drive rotor case by blade to rotate, the permanent-magnet that is embedded on the rotor case inner side surface rotates thereupon synchronously, three-phase coil winding cutting magnetic line in the stator, produce induction electromotive force, pass through high efficiency " friendship orthogonal " current transformer of outfit again, the rotating speed that makes the rotor that is driven by blade can change in big scope with the size of wind speed, energy Maximum Power Output when high wind speed, when hanging down wind speed, can improve generating efficiency, effectively raise utilization ratio of wind energy, annual electricity generating capacity improves 25%-40% than the wind power generating set of other type of same capability.Owing to saved the raising speed mechanism bulky, that structure is numerous and diverse, make the wind power generating set reduction 20%-25% of the volume and weight of whole wind power generating set on the one hand than other type of same capability, and reduced noise, the minimizing of parts must reduce the probability that breaks down on the other hand, has improved the generator set reliability of operation.Stator support and rotor case adopt and divide body structure, use general means of transportation and crane gear just to transport and install, and have both reduced transportation and mounting cost, have made things convenient for transportation, have reduced installation difficulty again.The cabin back segment is designed to be the hemisphere hull shape, when making distinguished and admirable arrival cabin back segment, can produce big turbulent flow and wake flow, the whole wind power generator is produced a reciprocal active force, so the power that affacts on the pylon is just very little, effectively increase stability of tower, strengthened wind loading rating.

Description of drawings

Embodiments of the invention are illustrated in conjunction with the accompanying drawings, wherein:

Fig. 1 is the described split type permanent magnet synchronous wind generator profile schematic representation of embodiment;

Fig. 2 is the internal structure schematic representation of the described split type permanent magnet synchronous wind generator of embodiment;

Fig. 3 is the split structural representation of stator support and rotor case;

Fig. 4 is the A-A sectional view of Fig. 3.

Among the figure: 1 is pylon, and 2 is solid of rotation, and 3 is stator support, 4 is rotor case, and 5 is central shaft, and 6 is blade, 7 is stator iron core, and 8 is the three-phase coil winding, and 9 is permanent-magnet, 10 is air gap, and 11 is bolt, and 12 is cylindrical pin with internal thread, 13 is the cabin, and 14 is rotating disk, and 15 is bearing, 16 is bearing, and 17 is wheel hub.

Embodiment

With reference to accompanying drawing, the described split type permanent magnet synchronous wind generator of embodiment, comprise pylon 1, the upper end of pylon 1 is connected to solid of rotation 2 by bearing 15, solid of rotation 2 is fixed in the inner chamber in cabin 13, the back segment in cabin 13 is the hemisphere hull shape, on solid of rotation 2, be connected with stator support 3 and central shaft 5, be connected to rotating disk 14 by bearing 16 on the central shaft 5, be connected with rotor case 4 on the rotating disk 14, the blade end of rotor case 4 is streamlined, be connected with blade 6 by wheel hub 17 on the rotating disk 14, on the circumferential surface of stator support 3, be inlaid with equally distributed stator iron core 7, be wound with three-phase coil winding 8 on the stator iron core 7, be inlaid with permanent-magnet 9 corresponding to the anchor ring inboard at stator iron core 7 and three-phase coil winding 8 positions, leave air gap 10 between permanent-magnet 9 and the stator iron core 7 at rotor case 4, stator support 3 and rotor case 4 all are divided into four splits respectively, are assembled into one with bolt 11 and cylindrical pin with internal thread 12 between the split.

In the present embodiment, be inlaid with 96 uniform rubidium iron boron permanent-magnets on the rotor case 4,360 parallel slots are made in the silicon steel plate stacking moulding of stator iron core 7 usefulness 0.5mm on the circumferential surface, between groove at a distance of 1 the degree, three-phase coil winding 8 spans 5 grooves, air gap 10 is 3mm.During work, three-phase coil winding 8 produces the electric current output that frequency is 6Hz-20Hz, sends into " friendship orthogonal " current transformer, and the standard electric alternating current by this current transformer output frequency is 50Hz is delivered to electrical network.

Claims

1, a kind of split type permanent magnet synchronous wind generator, comprise pylon (1), the upper end of pylon (1) is connected to solid of rotation (2) by bearing (15), solid of rotation (2) is fixed in the inner chamber of cabin (13), on solid of rotation (2), be connected with stator support (3) and central shaft (5), central shaft (5) is gone up and is connected to rotating disk (14) by bearing (16), be connected with rotor case (4) on the rotating disk (14), the blade end of rotor case (4) is streamlined, rotating disk (14) is gone up and is connected with blade (6) by wheel hub (17), on the circumferential surface of stator support (3), be inlaid with equally distributed stator iron core (7), be wound with three-phase coil winding (8) on the stator iron core (7), be inlaid with permanent-magnet (9) at rotor case (4) corresponding to the anchor ring inboard at stator iron core (7) and three-phase coil winding (8) position, leave air gap (10) between permanent-magnet (9) and the stator iron core (7), it is characterized in that stator support (3) and rotor case (4) all are respectively splits, the quantity of its split is two bodies at least, is assembled into one with bolt (11) and cylindrical pin with internal thread (12) between the split.

2, split type permanent magnet synchronous wind generator according to claim 1 is characterized in that stator support (3) is identical with the split quantity of rotor case (4).

3, split type permanent magnet synchronous wind generator according to claim 1 is characterized in that the split quantity of stator support (3) and rotor case (4) is inequality.

4, split type permanent magnet synchronous wind generator according to claim 1 and 2 is characterized in that the back segment in cabin (13) is the hemisphere hull shape.