CN201165941Y

CN201165941Y - Compound permanent magnetism direct drive wind power generator

Info

Publication number: CN201165941Y
Application number: CNU2007201573307U
Authority: CN
Inventors: 王雪霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-11-22
Filing date: 2007-11-22
Publication date: 2008-12-17
Anticipated expiration: 2017-11-22

Abstract

The utility model relates to a wind-driven generator, in particular to a duplex type permanent-magnetic direct-drive wind-driven generator, which comprises a wind turbine mounted at the front end of a main shaft, the main shaft is connected with generator shafts via a transmission box, the middle section of the generator shaft is fixedly connected with a rotor support, the outer ring of the rotor support is fixedly connected with a rotor bucket, the rotor bucket is a bucket-shaped component with a rotor bracket at the middle, the rotor bracket is transversely arranged on a partition plate in a bucket chamber, the center of the rotor bracket is equipped with a mounting hole for mounting the rotor support, more than two layers of rotor buckets are arranged on the rotor bracket along the diameter direction, the inner wall of the bucket chamber of the rotor bucket is equipped with a permanent magnet, the generator shafts are respectively equipped with a coil support via bearings on two sides of the rotor support, stator cores are fixedly mounted on the coil support corresponding to each layer of rotor buckets, and the stator core is internally equipped with a stator coil. The duplex type permanent-magnetic direct-drive wind-driven generator guarantees to output electric power under low rotating speed without transmission boxes and rectifying inverters, brings convenience to realize multi-stage modularization, and is high in electric energy conversion efficiency.

Description

Composite permanent magnetism direct drive wind power generator

Technical field

The utility model relates to a kind of wind-driven generator, especially composite permanent magnetism direct drive wind power generator.

Background technique

Wind energy more and more is subjected to the attention of countries in the world as a kind of renewable energy sources of cleaning.Its amount of accumulateing is huge, and the wind energy in the whole world is about 2.74 * 10 ₉MW, wherein available wind energy is 2 * 10 ₇MW is also bigger 10 times than the water energy total amount that can develop on the earth.The Chinese feature energy storage capacity is very big, distribution is wide, and only the wind energy content of land is about 2.53 hundred million kilowatts.Along with development of global economy, wind energy market also develops rapidly.Wind-driven generator is to utilize wind energy to drive blade to drive main shaft, and cutting magnetic line in stator and rotor generation relative displacement produces electric current in coil.Existing wind-driven generator can be divided into two kinds of an extremely multi-thread circle and a utmost point one coils according to the form of coil winding, wherein an extremely multi-thread circle wind-driven generator requires rotor to have high rotational speed, just can export electric energy, usually between wind wheel and generator amature, gearbox be set, improve the speed of rotor, because gearbox designs complexity, exercise load are big, its working life is short, the rate of fault height; The medium-and-large-sized wind-driven generator wind-driven generator of one utmost point, one coil is because rotating speed is slow, usually volume is bigger, output voltage is a square wave, there is a large amount of higher harmonicss, need commutation inversion just can be incorporated into the power networks later on electrical network, and rectification adverser cost of production height not only, its rate of fault and working life are all undesirable.In addition, common direct wind-driven generator mostly adopts the structure of a stator one rotor, and when the generator volume was very large, generator inner space utilization ratio was low, can't reach the requirement that makes full use of the space.

Summary of the invention

The purpose of this utility model provides and a kind ofly need not gearbox and rectification adverser, makes full use of the generator inner space, the direct composite permanent magnetism direct drive wind power generator that is incorporated into the power networks of sine wave output Ac.

For achieving the above object, the utility model adopts following technological scheme:

Composite permanent magnetism direct drive wind power generator described in the utility model, comprise the wind wheel that blade is installed, wind wheel is installed in the front end of main shaft, it is characterized in that: main shaft connects generator shaft by transmission case, the stage casing of generator shaft is fixedly connected with the rotor bearing, the fixedly connected rotor bucket in the outer ring of rotor bearing, the rotor bucket is the middle round barrel shape parts that have rotor rack, rotor rack is the dividing plate that is horizontally installed in the drum chamber, its center has the mounting hole that is used to install the rotor bearing, be provided with rotor bucket more than two-layer in rotor rack upper edge diametric(al), on the bucket cavity wall of rotor bucket permanent magnet be set; On the generator shaft of rotor bearing both sides, by Bearing Installation coil brace is arranged respectively, fixed-site corresponding with each layer rotor bucket on the coil brace is installed stator iron core, at interval uniform air gap has stator coil between stator iron core and the permanent magnet in the stator iron core; Coil brace is fixedlyed connected with bearing.

Generator shaft is connected with the output shaft of transmission case by shaft joint, and break also is installed on the output shaft, be connected main shaft on the wind wheel by Bearing Installation in transmission case, and by gearwheel and the pinion that is installed on the output shaft.

Described permanent magnet is arranged in a combination by a plurality of triangle magnet pieces.

Described rotor bucket is the round barrel shape parts, and rotor rack is horizontally installed on the centre in drum chamber, and its center has the mounting hole that is used to install the rotor bearing, is provided with permanent magnet on the drum cavity wall of rotor rack both sides.

The rotor bucket outer side covers the ventilation safety cover is arranged, the ventilation safety cover is fixedly connected on the coil brace.

The rotor bearing is sleeved on the generator shaft, and fixedly connected by flat key.

Adopt after the technique scheme, the utlity model has following advantage:

1, can adopt the structure of a utmost point one coil, guarantee the electric power that output can directly be incorporated into the power networks under the slow-speed of revolution, own loss is low, and noise is little, has improved delivery efficiency and working life, has reduced rate of fault;

2, directly export sinusoidal ac, need not rectifier and inverter, thereby reduce rate of fault, increase the service life;

3, because the composite permanent magnetism direct drive wind power generator rotating speed is slow, and the magnetic pole logarithm is many, is convenient to realize the multistage modularization of coil, series parallel connection difficulty easy to adjust, that transport and lift by crane is low, can be used for the superpower wind-driven generator;

4, generator inner space utilization ratio height, compact structure, power is big.

5, can realize a plurality of generator combination operations, realize power regulation moduleization, cost of production is low.

6, adopt the rotor structure of balanced, symmetrical formula, operate steadily, noise is low.Simple in structure, efficient is high.

7, rotor and stator are directly installed on the same axis, the installation precision height, and the air gap between rotor and stator iron core reduces significantly, the utilization ratio height of permanent-magnet material.Can reduce manufacture cost significantly.

8, adopt the one-level gear transmission, velocity ratio is little, does not have the parts that run up, and is suitably improving under the prerequisite of generator speed degree, can reduce the volume of generator, reduces rate of fault, increases the service life.

Description of drawings

Fig. 1 is an an embodiment's of the present utility model structural representation;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the arranging structure schematic representation of triangle magnet piece.

Embodiment

Fig. 1 is an an embodiment's of the present utility model sectional view, and for clarity, the hatching among the figure is not drawn; As shown in Figure 1, composite permanent magnetism direct drive wind power generator described in the utility model comprises the wind wheel 2 that blade 1 is installed, and wind wheel 2 is installed in the front end of main shaft 3.The rear end of main shaft 3 connects generator shaft 5 by transmission case 4.Generator shaft 5 is connected with the output shaft 12 of transmission case 4 by shaft joint, and break 13 also is installed on the output shaft 12, and the input shaft of transmission case 4 is connected with the rotating shaft of wind wheel.The input shaft of transmission case 4 and output shaft 12 pass through gear engagement.The stage casing of generator shaft 5 is fixedly connected with rotor bearing 6 by flat key, and rotor bearing 6 is discoid, and generator shaft 5 vertically interts at the center of rotor bearing 6.The fixedly connected rotor bucket 7 in the outer ring of rotor bearing 6; Rotor bucket 7 is the middle round barrel shape parts that have rotor rack 15, rotor rack 15 is for being horizontally installed on the dividing plate in the middle of the drum chamber, its center has the mounting hole that is used to install rotor bearing 6, be provided with rotor bucket 7 more than two-layer in rotor rack 15 upper edge diametric(al)s, on 7 barrels of cavity walls of rotor bucket of rotor rack 15 both sides, permanent magnet 8 be set.Permanent magnet 8 is arranged in a combination by a plurality of triangle magnet pieces, as Fig. 2, shown in Figure 3, the triangle magnet piece according to same pole forward side by side according to leg-of-mutton base, oppositely the magnet of magnetic pole oppositely interts in the middle of the two triangle of facing mutually.The shape of triangle magnet piece is formed the magnetic field that distributes by sinusoidal rule, makes the coil of each wire casing of stator iron core all directly produce sinusoidal ac when cutting magnetic line.On the generator shaft 5 of rotor bearing 6 both sides, by Bearing Installation coil brace 9 is arranged respectively, fixed-site corresponding with each layer rotor bucket 7 on the coil brace 9 is installed stator iron core, at interval uniform air gap has stator coil 10 between stator iron core 10 and the permanent magnet 8 in the stator iron core; Coil brace 9 is fixedlyed connected with bearing 12.。Rotor bucket 7 outer side covers ventilation safety cover 11 is arranged, ventilation safety cover 11 is fixedly connected on the coil brace 9.

The rear end of generator shaft 5 can also connect the generator of one or more groups same structure by coupling.

During use, wind blows blade 1, wind wheel 2 is rotated, wind wheel 2 drives main shaft 3 process gearwheels 31, small gear 32 after the single-stage speedup of output shaft 12, drive generator shaft 5 rotations, in the time of 7 rotations of the rotor bearing 6 of fixedlying connected with generator shaft 5 and rotor bucket, cutting magnetic line when being installed in magnetic field that the permanent magnet 8 on rotor bucket 7 inwalls produces through stator coil 10 produces induced potential in stator coil 10.Each layer stator coil 10 can use by serial or parallel connection, reaches the purpose that makes full use of the generator inner space.Because permanent magnet 8 is to be arranged in a combination by as shown in Figure 3 triangle magnet piece, on the moving direction of stator coil 10 cutting magnetic lines, the conversion of magnetic pole is the conversion gradually of moving with the position, rather than the process of a sudden change, and changes by sinusoidal rule.Like this, the polarity transformation of output current also is the process of a gradual change, as long as rationally adjust the base of triangle magnet piece and the aspect ratio of waist, just can in stator coil 10, produce perfectly, meet the sine wave alternating current that is incorporated into the power networks and requires, need not the rectification adverser conversion.Cooperate oar-changing speed-regulating device can realize wind-driven generator constant frequency, constant speed output electric energy.This partial data Calculation Method, formula and technical parameter are the known technologies of related domain, and those of ordinary skill can be realized fully according to above-mentioned prompting.No longer be described in detail at this.

Break 13 can adopt multiple break of the prior art.

Claims

1, composite permanent magnetism direct drive wind power generator, comprise the wind wheel (2) that blade (1) is installed, wind wheel (2) is installed in the front end of main shaft (3), it is characterized in that: main shaft (3) connects generator shaft (5) by transmission case (4), the stage casing of generator shaft (5) is fixedly connected with rotor bearing (6), the fixedly connected rotor bucket in the outer ring of rotor bearing (6) (7), rotor bucket (7) has the round barrel shape parts of rotor rack (15) for the centre, rotor rack (15) is for being horizontally installed on the dividing plate in the drum chamber, its center has the mounting hole that is used to install rotor bearing (6), be provided with rotor bucket (7) more than two-layer in rotor rack (15) upper edge diametric(al), on the bucket cavity wall of rotor bucket (7) permanent magnet (8) be set; On the generator shaft (5) of rotor bearing (6) both sides, by Bearing Installation coil brace (9) is arranged respectively, coil brace (9) is gone up the fixed-site corresponding with each layer rotor bucket (7) stator iron core is installed, at interval uniform air gap has stator coil (10) between stator iron core and the permanent magnet (8) in the stator iron core; Coil brace (9) is fixedlyed connected with bearing (12).

2, composite permanent magnetism direct drive wind power generator according to claim 1, it is characterized in that: generator shaft (5) is connected with the output shaft (12) of transmission case (4) by shaft joint, break (13) also is installed on the output shaft (12), be connected main shaft (3) on the wind wheel by Bearing Installation in transmission case (4), and by gearwheel (31) and small gear (32) engagement that is installed on the output shaft (12).

3, composite permanent magnetism direct drive wind power generator according to claim 1 and 2 is characterized in that: described permanent magnet (8) is arranged in a combination by a plurality of triangle magnet pieces.

4, composite permanent magnetism direct drive wind power generator according to claim 1 and 2, it is characterized in that: described rotor bucket (7) is the round barrel shape parts, rotor rack (15) is horizontally installed on the centre in drum chamber, its center has the mounting hole that is used to install rotor bearing (6), is provided with permanent magnet (8) on the drum cavity wall of rotor rack (15) both sides.

5, composite permanent magnetism direct drive wind power generator according to claim 1 and 2 is characterized in that: rotor bucket (7) outer side covers ventilation safety cover (11) is arranged, ventilation safety cover (11) is fixedly connected on the coil brace (9).

6, composite permanent magnetism direct drive wind power generator according to claim 1 and 2 is characterized in that: rotor bearing (6) is sleeved on the generator shaft (5), and fixedly connected by flat key.