CN101997370A - 2.5, 3 and 3.6 MW medium-rotor low-speed permanent-magnetic synchronous wind generator - Google Patents
2.5, 3 and 3.6 MW medium-rotor low-speed permanent-magnetic synchronous wind generator Download PDFInfo
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- CN101997370A CN101997370A CN 201010544455 CN201010544455A CN101997370A CN 101997370 A CN101997370 A CN 101997370A CN 201010544455 CN201010544455 CN 201010544455 CN 201010544455 A CN201010544455 A CN 201010544455A CN 101997370 A CN101997370 A CN 101997370A
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Abstract
The invention provides a 2.5, 3 and 3.6 MW medium-rotor low-speed permanent-magnetic synchronous wind generator which is characterized by mainly comprising a casing, a stator, a medium rotor and a static main shaft, wherein the stator, the medium rotor and the static main shaft are arranged in the casing; the stator is arranged in the position near the inner wall of the casing; the static main shaft is arranged in the center position in the casing; and the medium rotor is arranged on the static main shaft through double bearings sleeved on the static main shaft and can rotate by taking the static main shaft as a rotating shaft. The generator of the invention can be directly connected with a wind wheel and a rotary bottom frame of an engine room of a direct-driven wind generating set to replace a low-speed main shaft driving and supporting device, a speed increasing box and a high-speed shaft connecting device of a double-fed wind generating set. In the generator of the invention, the structure of a large wind generating set is simplified, and the generator of the invention has the advantages of preferable quality of electric energy, higher generating efficiency, lower failure rate, lower operation and maintenance cost and very considerable economic benefit and social benefit.
Description
Technical field: the present invention relates to a kind of megawatt-level low-speed permanent magnet synchronous wind generator, especially relate to a kind of 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators, belong to the wind power plant field.
Background technology: existing megawatt-level low-speed permanent magnet synchronous wind generator all is the technology from external introduction, engine type is that external rotor low-speed permanent magnet synchronous wind power generator and internal rotor single shaft hold the low-speed permanent magnet synchronous wind power generator structure, key technology, the critical component localization rate of parts and components are very low, be in the monopoly position of this technology abroad, the low-speed permanent magnet synchronous wind power generator of China's independent research, independent intellectual property right also is in blank.
In addition, all need main shaft and three kinds of equipment of gearbox of excitation system, wind turbine generator in the structure of present applied MW class dual-feed asynchronous wind power generator, so, its complex structure, the quality of power supply is bad, and operation and installation are also inconvenient.And existing megawatt-level low-speed permanent magnet synchronous wind generator technology from external introduction has the internal rotor single bearing structure, bearing need be from external introduction, intensity is not so good, the ventilation and heat of outer-rotor structure is also bad, the existing problem of so existing equipment, technology dependence is strong, national conditions adaptability is bad, and how complex manufacturing, buying, installation, maintenance trouble solve these and ask and yet there are no report.
Summary of the invention:
Goal of the invention: the invention provides a kind of 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators, its objective is solved the existing mechanical strength fail safe of equipment in the past low,, and the unit matching is poor, the problem of complex manufacturing, installation, maintenance trouble.
Technical scheme: the present invention is achieved through the following technical solutions:
A kind of 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators is characterized in that: described generator mainly comprises casing and is arranged on casing interior stator, rotor and quiet main shaft; Stator is arranged on the position near the inwall of casing; Quiet main shaft is arranged on the centre in the casing, and rotor is arranged on the quiet main shaft by the duplex bearing that is enclosed within on the quiet main shaft, and can serve as the axle rotation with quiet main shaft.
Also include front end housing that is arranged on the casing front end and the rear end cap that is arranged on casing rear end in the described generator; Described stator is connected with the flange seam of quiet main shaft by rear end cap.
The rear end of described rotor also be connected with can with the synchronous brake disc arresting gear of rotation of rotor.
Also be provided with on the described rear end cap and can pass the brake disc arresting gear to realize the impeller lock pin arresting gear of braking.
Described impeller lock pin arresting gear is connected with the electromagnetic brake braking circuit, realizes that by the electromagnetic brake braking circuit impeller lock pin arresting gear passes and leave the brake disc arresting gear.
Described rotor adopts 78 utmost points, stator to adopt the fractional-slot design of 324 grooves.
On the rotor of described 78 utmost points, each magnetic pole is installed and is adopted the hermetically sealed gland of corrosion resistant plate to install and protection.
Described casing outer round surface is the heat radiation gusset, and described heat radiation gusset adopts low early and high after diagonal bar structure; The maximum gauge of described casing is 5200mm.
Described duplex bearing is double-row self-aligning roller bearing and the rear end single row roller bearing that is arranged on the rotor front end, and described rotor is installed in by double-row self-aligning roller bearing and rear end single row roller bearing and realizes on the quiet main shaft rotatablely moving.
Quiet main shaft adopts the big open circles axis of cone, and duplex bearing adopts big open circles taper structure.
Advantage and effect: the invention provides a kind of 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators, it is characterized in that: described generator mainly comprises casing and is arranged on casing interior stator, rotor and quiet main shaft; Stator is arranged on the position near the inwall of casing; Quiet main shaft is arranged on the centre in the casing, and rotor is arranged on the quiet main shaft by the duplex bearing that is enclosed within on the quiet main shaft, and can serve as that the axle rotation forms magnetic force line cutting with quiet main shaft.
The present invention and existing megawatt-level low-speed permanent magnet synchronous wind generator are at electromagnetic parameter, rotor structure, method for installing magnetic poles, double-row self-aligning cylinder and aspects such as the support of single-row cylinder duplex bearing, brake device, all adopted advanced technology brand-new, that meet professional principle and national conditions, it is advanced leading putting into practice this generator techniques verified.
The present invention has overcome the bad and bad shortcoming of external rotor ventilation and heat of inner rotor core intensity of prior art, provide a kind of innovation, aim at the direct wind-driven generator group and supporting, the big hollow shaft rotor of circular cone dual bearing structure art designs, be more suitable for directly driving the work of low speed wind power generating set, environment, dynamic characteristic, a kind of megawatt-level low-speed permanent magnet synchronous wind generator that mechanical strength safety, electric property are stablized, installation and maintenance are convenient, be convenient to promote the use of.
Characteristics of the present invention are as follows:
1, quiet main shaft support adopts the big hollow shaft of circular cone, and rotor adopts the big hollow shaft of circular cone, and bearing adopts the duplex bearing technology, the fore bearing reach to and radial load, rear bearing carrying radial load;
2, the electromagnetic circuit design is taked the fractional-slot distribution design of rotor 78 utmost points, stator 324 grooves through optimizing;
3, the magnetic pole mounting process adopts the hermetically sealed gland of corrosion resistant plate to install;
4, braking device adopts electromagnetic braking and impeller lock pin arresting gear and brake disc arresting gear, and the brake disc arresting gear directly is connected with the rotor rear end, and whole device has constituted brake and shut down safety device;
5, the low early and high after diagonal bar plate structure of casing outer round surface is adopted in the generator heat radiation, utilizes the natural wind cooling heat radiation in high-altitude, and wind is big more, and it is many more to generate electricity, and cooling effect is good more.
Quiet main shaft of the present invention does not rotate, stator coil does not rotate, rotor is realized rotatablely moving by two bearings that are contained on the quiet main shaft, the permanent-magnetic field of p-m rotor is under the rotary power effect that wind-force produces, cutting magnetic line has been realized the conversion of electric energy, the variation that is directly proportional with the size of wind speed of the size of energy output.
This device can omit main shaft and three kinds of equipment of gearbox of excitation system, wind turbine generator fully, and the rotor axle directly is connected with wind wheel, and wind wheel drives the rotor axle and rotates synchronously, does not have mechanical efficiency losses; Permanent magnet on the rotor provides permanent-magnetic field, does not have electric excitation loss.Because of not having mechanical loss and electric excitation loss, the interval generating efficiency height of gentle breeze, 2.5 meter per seconds can generate electricity, and under the equal wind regime condition, improve more than 7% than double-fed asynchronous generator annual energy output; Because electric generator structure compactness, simple is more simplified the whole service system, failure rate and maintenance and repair workload have been reduced.
Description of drawings:
Fig. 1 is an overall structure cutaway view of the present invention;
Fig. 2 is a rotor structural representation of the present invention;
Fig. 3 is rotor magnetic pole strip adoption corrosion resistant plate sealing scheme of installation of the present invention;
Fig. 4 is that casing outer round surface heat radiation gusset of the present invention adopts the diagonal bar structural representation.
Embodiment: the present invention is described further below in conjunction with accompanying drawing:
As shown in Figure 1, the invention provides a kind of 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators, described generator mainly comprises casing 2 and is arranged on stator 3, rotor 4 and quiet main shaft 6 in the casing 2; Stator 3 is arranged on the position near the inwall of casing 2; Quiet main shaft 6 is arranged on the centre in the casing 2, and rotor 4 is arranged on the quiet main shaft 6 by the duplex bearing that is enclosed within on the quiet main shaft 6, and can serve as that the axle rotation forms magnetic force line cutting with quiet main shaft 6.Quiet main shaft 6 flanges are connected with cabin revolution underframe with high strength bolt during use, and quiet main shaft 6 directly arrives the force transmission of wind wheel the bottom of tower tube as the rigidity parts, have realized that the load bang path simplifies most.
Also include front end housing 1 that is arranged on casing 2 front ends and the rear end cap 9 that is arranged on casing 2 rear ends in the described generator; Described stator 3 is connected with the flange seam of quiet main shaft 6 by rear end cap 9.So reduced the alternate load of stator 3 and rear end cap 9 and the active force of other load, made 3 of stators bear dead weight and torsion load, thus improve generator mechanical strength and the uniform reliability of rotor clearance magnetic pull.Rear end cap 9 can be connected by high strength bolt with the flange seam of quiet main shaft 6.
The rear end of described rotor 4 also be connected with can with the rotor 4 brake disc arresting gears 7 of rotation synchronously.Also be provided with on the described rear end cap 9 and can pass brake disc arresting gear 7 to realize the impeller lock pin arresting gear 8 of braking.
Described rotor 4 is that duplex bearing support to be realized rotatablely moving, and promptly rotor 4 is as rigidity rotatable parts front direct joining wind power generator group wind wheel, transmitting torque and carrying alternate load; Back direct connection brake disc arresting gear 7 is realized safety arrestment; Thereby the high efficiency of wind wheel transmitting torque and the fail safe of generator outage and maintenance have been improved.
Realize that by the electromagnetic brake braking circuit axle Xiao arresting gear 8 passes and leave brake disc arresting gear 7, when impeller lock pin arresting gear 8 passes brake disc arresting gear 7, realize shutting down, form the second road safety guarantee of service work.Electromagnetic brake braking control, it has realized the 3rd road safety guarantee of shutdown and service work.
Described rotor 4 adopts 78 utmost points, stator 3 to adopt the fractional-slot design of 324 grooves, has realized low starting torque, the substantial economics of breeze wind.
On the rotor 4 of described 78 utmost points, each magnetic pole is installed and is adopted the hermetically sealed gland of corrosion resistant plate to install and protection, has protected the operating machine security of magnetic pole, and the high order harmonic component influence has been eliminated in shielding, has prolonged the life-span of magnetic pole.
Described casing 2 outer round surface are the heat radiation gusset, and described heat radiation gusset adopts low early and high after diagonal bar structure.Such structure makes that the natural wind cooling is effective, and mechanical strength improves.
Described duplex bearing is double-row self-aligning roller bearing and the rear end single row roller bearing 5 that is arranged on rotor 4 front ends, and described rotor 4 is installed on the quiet main shaft 6 by double-row self-aligning roller bearing and rear end single row roller bearing 5 and realizes rotatablely moving.
Quiet main shaft 6 adopts the big hollow shaft of circular cone, and duplex bearing is installed in the big hollow shaft two-end structure of circular cone.In addition, the present invention can also be equiped with cooling system.
Quiet when in use main shaft 6 flanges of the present invention are connected with cabin revolution underframe with high strength bolt, and rotor 4 is as rigidity rotatable parts front direct joining wind power generator group wind wheel, transmitting torque with carry alternate load; Back direct connection brake disc arresting gear 7 is realized safety arrestment; Permanent magnetism rotor 4 rotates synchronously with wind wheel under wind wheel drives, and the permanent-magnetic field of permanent magnetism rotor 4 is under the rotary power effect that wind-force produces, and cutting magnetic line has been realized the conversion of electric energy, the variation that is directly proportional with the size of wind speed of the size of energy output.
Characteristics of the present invention are as follows:
1, the present invention adopts the rotor rotational structure, aims at wind turbine generator and designs;
2, rotor adopts duplex bearing to support, and front end is connected with wind wheel, and carrying lotus ability is big, and running accuracy is good;
3, quiet main shaft adopts the big hollow shaft of circular cone to make dead axle, and the rear end is connected with cabin driftage underframe, and load transmission performance is good, and the bearing load ability is big, and processing performance, maintaining are convenient and safe;
4, the brake disc arresting gear is connected with the rotor rear end, convenient, safety, reliable;
5, rotor number of magnetic poles and number of stator slots distribute and adopt fractional-slot Electromagnetic Design scheme, and starting torque is little, low wind speed generating efficiency height.
6, the permanent magnet of rotor adopts efficient Nd-Fe-Bo permanent magnet material, and eternal kinetic energy is brought in permanent highfield, and generating efficiency exceeds 4% than conventional motors;
7, generator cooling with the high-altitude natural air cooled for the air blast cooling of advocating peace be auxilliary;
8, low temperature tolerance characteristics is good, and main components adopts low-alloy manganese steel and Q345 medium carbon steel;
9, electric generator casing outer round surface heat radiation gusset adopts the diagonal bar structure, and mechanical strength improves, and the natural wind cooling is effective.
10, impeller lock pin arresting gear is installed on the rear end cap, passes by impeller lock pin arresting gear and rotates brake disc realization shutdown, guarantees the safety of service work.
11, electromagnetism is shut down braking, has realized the 3rd road safety of shutdown and service work by simple circuit, resistance control.
12, entire machine design meets the national conditions and the applied environment of China, is to aim at the wind turbine generator manufacturer and the rotor low-speed permanent-magnet wind-driven generator produced, and electric generator structure is reasonable in design, and is easy for installation, reliable.
This invention can directly be connected with cabin revolution underframe with the wind wheel of direct-drive aerogenerator group, has substituted double-feedback aerogenerator group low speed spindle drive and bracing or strutting arrangement, gearbox and high speed shaft jockey.The present invention makes the structure of Large-scale Wind Turbines develop to simple direction, and the quality of power supply is better, generating efficiency is more increased, failure rate and operation expense are lower, economic benefit and establish can benefit very considerable.
Claims (10)
1. one kind 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators is characterized in that: described generator mainly comprises casing (2) and is arranged on casing (2) interior stator (3), rotor (4) and quiet main shaft (6); Stator (3) is arranged on the position near the inwall of casing (2); Quiet main shaft (6) is arranged on the centre in the casing (2), and rotor (4) is arranged on the quiet main shaft (6) by the duplex bearing that is enclosed within on the quiet main shaft (6), and can serve as the axle rotation with quiet main shaft (6).
2. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 1 is characterized in that: also include the front end housing (1) that is arranged on casing (2) front end in the described generator and be arranged on the rear end cap (9) of casing (2) rear end; Described stator (3) is connected with the flange seam of quiet main shaft (6) by rear end cap (9).
3. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 1 and 2 is characterized in that: the rear end of described rotor (4) also be connected with can with the synchronous brake disc arresting gear (7) of rotation of rotor (4).
4. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 3 is characterized in that: also be provided with on the described rear end cap (9) and can pass brake disc arresting gear (7) to realize the impeller lock pin arresting gear (8) of braking.
5. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 4; it is characterized in that: described impeller lock pin arresting gear (8) is connected with the electromagnetic brake braking circuit, realizes that by the electromagnetic brake braking circuit impeller lock pin arresting gear (8) passes and leave brake disc arresting gear (7).
6. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 1 is characterized in that: described rotor (4) adopts 78 utmost points, stator (3) to adopt the fractional-slot design of 324 grooves.
7. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 6 is characterized in that: on the rotor of described 78 utmost points (4), each magnetic pole is installed and is adopted the hermetically sealed gland of corrosion resistant plate to install and protection.
8. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 1 is characterized in that: described casing (2) outer round surface is the heat radiation gusset, and described heat radiation gusset adopts low early and high after diagonal bar structure; The maximum gauge of described casing (2) is 5200mm.
9. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 1, it is characterized in that: described duplex bearing is for being arranged on the double-row self-aligning roller bearing and the rear end single row roller bearing (5) of rotor (4) front end, and described rotor (4) is installed in quiet main shaft (6) by double-row self-aligning roller bearing and rear end single row roller bearing (5) and upward realizes rotatablely moving.
10. 2.5,3 and 3.6 megawatt rotor low-speed permanent magnet synchronous wind power generators according to claim 1 is characterized in that: quiet main shaft (6) adopts the big open circles axis of cone, and duplex bearing adopts big open circles taper structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010544455 CN101997370A (en) | 2010-11-16 | 2010-11-16 | 2.5, 3 and 3.6 MW medium-rotor low-speed permanent-magnetic synchronous wind generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010544455 CN101997370A (en) | 2010-11-16 | 2010-11-16 | 2.5, 3 and 3.6 MW medium-rotor low-speed permanent-magnetic synchronous wind generator |
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| Publication Number | Publication Date |
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| CN101997370A true CN101997370A (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010544455 Pending CN101997370A (en) | 2010-11-16 | 2010-11-16 | 2.5, 3 and 3.6 MW medium-rotor low-speed permanent-magnetic synchronous wind generator |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6555941B1 (en) * | 2002-03-08 | 2003-04-29 | Dura-Trac Motors, Inc. | Brushless permanent magnet motor or alternator with variable axial rotor/stator alignment to increase speed capability |
| CN201142613Y (en) * | 2008-01-02 | 2008-10-29 | 湘潭电机股份有限公司 | Cooling rib direct-driving permanent magnetic synchronous single-bearing aerogenerator |
| CN101639042A (en) * | 2009-08-28 | 2010-02-03 | 华小平 | Megawatt-stage direct-drive internal rotor permanent-magnetic wind power generator set |
| CN201854158U (en) * | 2010-11-16 | 2011-06-01 | 沈阳工华风电技术开发有限公司 | 2.5 megawatt (MW), 3MW and 3.6MW middle-rotor low-speed permanent-magnet synchronous wind turbine generator |
-
2010
- 2010-11-16 CN CN 201010544455 patent/CN101997370A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6555941B1 (en) * | 2002-03-08 | 2003-04-29 | Dura-Trac Motors, Inc. | Brushless permanent magnet motor or alternator with variable axial rotor/stator alignment to increase speed capability |
| CN201142613Y (en) * | 2008-01-02 | 2008-10-29 | 湘潭电机股份有限公司 | Cooling rib direct-driving permanent magnetic synchronous single-bearing aerogenerator |
| CN101639042A (en) * | 2009-08-28 | 2010-02-03 | 华小平 | Megawatt-stage direct-drive internal rotor permanent-magnetic wind power generator set |
| CN201854158U (en) * | 2010-11-16 | 2011-06-01 | 沈阳工华风电技术开发有限公司 | 2.5 megawatt (MW), 3MW and 3.6MW middle-rotor low-speed permanent-magnet synchronous wind turbine generator |
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Application publication date: 20110330 |