CN212412869U - Rotor structure of permanent magnet wind driven generator - Google Patents
Rotor structure of permanent magnet wind driven generator Download PDFInfo
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- CN212412869U CN212412869U CN202020994956.9U CN202020994956U CN212412869U CN 212412869 U CN212412869 U CN 212412869U CN 202020994956 U CN202020994956 U CN 202020994956U CN 212412869 U CN212412869 U CN 212412869U
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- magnetic pole
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- ventilation hole
- recess
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Abstract
The utility model discloses a rotor structure of a permanent magnet wind driven generator, which comprises a rotor bracket and a rotor magnetic pole component, wherein the rotor magnetic pole component is circumferentially distributed on the rotor bracket and is formed by connecting a plurality of rotor magnetic poles arranged between two magnetic pole pressing plates in series through square screw rods, each rotor magnetic pole comprises a magnetic pole box and magnetic steel, and a ventilation groove is formed between every two adjacent magnetic pole boxes; evenly distributed has the multiunit ventilation hole on rotor support's the outer peripheral face, and a set of ventilation hole corresponds a ventilation recess, and every group ventilation hole is located corresponding ventilation recess promptly under, the junction of magnetic pole box and adjacent magnetic pole box, processing has a plurality ofly and the ventilation notch that below ventilation hole shape size is unanimous promptly on the bottom surface of ventilation recess promptly, the ventilation notch link up with ventilation recess and ventilation hole mutually to constitute the ventiduct. The utility model discloses can evenly cool off the magnet steel temperature, effectively improve the uneven problem of magnet steel temperature distribution.
Description
Technical Field
The utility model relates to a half technical field who directly drives permanent magnet wind power generator especially indicates a permanent magnet wind power generator rotor structure.
Background
With the development of the onshore wind driven generator towards the direction of low rotating speed, large blades and high power, the semi-direct drive permanent magnet synchronous generator adopts an inner rotor structure; in order to reduce the volume of the generator, the magnetic steel adopts SH grades with high coercivity and high remanence density, but the SH grade magnetic steel is not resistant to high temperature, the magnetic performance of the magnetic steel is weakened under the high temperature condition, and even the magnetic steel is demagnetized. The gaps are formed in the two sides of the magnetic pole of the rotor in the prior art, so that the ventilation groove is formed to reduce the temperature of the magnetic steel, and the problem of over-high temperature demagnetization of the magnetic steel is solved. However, the temperature of the magnetic steel is measured by sticking the temperature paste on the magnetic pole component of the rotor, and the temperature of the magnetic steel at different positions is found to be different, so that the magnetic steel is far away from the fan end, the temperature of the magnetic steel is too high, and the risk of demagnetization exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art not enough, provide a permanent magnet wind power generator rotor structure, can the even cooling magnet steel temperature, improve the uneven problem of magnet steel temperature distribution, avoid magnet steel high temperature demagnetization, improve the operational reliability.
In order to achieve the above object, the present invention provides a technical solution: a rotor structure of a permanent magnet wind driven generator comprises a rotor support and rotor magnetic pole assemblies distributed on the rotor support in the circumferential direction, wherein each rotor magnetic pole assembly is formed by connecting a plurality of rotor magnetic poles arranged between two magnetic pole pressing plates in series through square screws, each rotor magnetic pole is composed of a magnetic pole box and magnetic steel, and a ventilation groove is formed between every two adjacent magnetic pole boxes; evenly distributed has the multiunit ventilation hole on rotor support's the outer peripheral face, and a set of ventilation hole corresponds a ventilation recess, and every group ventilation hole is located corresponding ventilation recess promptly under, the junction of magnetic pole box and adjacent magnetic pole box, processing has a plurality ofly and the ventilation notch that below ventilation hole shape size is unanimous on the bottom surface of ventilation recess promptly, the ventilation notch link up with ventilation recess and ventilation hole mutually to constitute the ventiduct, cool off the magnet steel in the magnetic pole box through the circulation of air in the ventiduct, thereby realize the temperature reduction of magnet steel.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
the utility model discloses can evenly cool off the magnet steel temperature, effectively improve the uneven problem of magnet steel temperature distribution, avoid magnet steel high temperature demagnetization, improve operational reliability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view a of fig. 1.
Fig. 3 is a side view of the present invention.
Fig. 4 is a schematic structural view of the rotor support of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
As shown in fig. 1 to 4, the rotor structure of a permanent magnet wind power generator according to the present embodiment includes a rotor frame 1 and rotor magnetic pole assemblies circumferentially distributed on the rotor frame 1, the rotor magnetic pole assemblies are formed by connecting a plurality of rotor magnetic poles installed between two magnetic pole pressing plates in series through square screws, the rotor magnetic poles are formed by magnetic pole boxes 2 and magnetic steel (not shown in the figure), ventilation grooves 3 are formed between every two adjacent magnetic pole boxes 2, a plurality of groups of ventilation holes 4 are uniformly distributed on the outer circumferential surface of the rotor frame 1, and a group of ventilation holes 4 corresponds to a ventilation groove 3, i.e. each group of ventilation holes 4 is located right below the corresponding ventilation groove 3, a plurality of ventilation notches 5 having the same shape and size as the ventilation holes 4 below are processed on the bottom surface of the ventilation groove 3 at the joint of the magnetic pole boxes 2 and the adjacent magnetic pole boxes 2, i.e. the ventilation notches 5 communicate the ventilation grooves 3 with the ventilation holes 4, and form an air duct; the rotor can play the effect of fan at the in-process of rotation, cools off all magnet steels in the magnetic pole box 2 through the circulation of air in the ventiduct that link up to realize the even reduction of temperature of all magnet steels.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (1)
1. A rotor structure of a permanent magnet wind driven generator comprises a rotor support and rotor magnetic pole assemblies distributed on the rotor support in the circumferential direction, wherein each rotor magnetic pole assembly is formed by connecting a plurality of rotor magnetic poles arranged between two magnetic pole pressing plates in series through square screws, each rotor magnetic pole is composed of a magnetic pole box and magnetic steel, and a ventilation groove is formed between every two adjacent magnetic pole boxes; the method is characterized in that: evenly distributed has the multiunit ventilation hole on rotor support's the outer peripheral face, and a set of ventilation hole corresponds a ventilation recess, and every group ventilation hole is located corresponding ventilation recess promptly under, the junction of magnetic pole box and adjacent magnetic pole box, processing has a plurality ofly and the ventilation notch that below ventilation hole shape size is unanimous on the bottom surface of ventilation recess promptly, the ventilation notch link up with ventilation recess and ventilation hole mutually to constitute the ventiduct, cool off the magnet steel in the magnetic pole box through the circulation of air in the ventiduct, thereby realize the temperature reduction of magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020994956.9U CN212412869U (en) | 2020-06-03 | 2020-06-03 | Rotor structure of permanent magnet wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020994956.9U CN212412869U (en) | 2020-06-03 | 2020-06-03 | Rotor structure of permanent magnet wind driven generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212412869U true CN212412869U (en) | 2021-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020994956.9U Active CN212412869U (en) | 2020-06-03 | 2020-06-03 | Rotor structure of permanent magnet wind driven generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN212412869U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365753A (en) * | 2022-07-29 | 2023-06-30 | 北京金风科创风电设备有限公司 | Rotor, generator and wind generating set |
-
2020
- 2020-06-03 CN CN202020994956.9U patent/CN212412869U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365753A (en) * | 2022-07-29 | 2023-06-30 | 北京金风科创风电设备有限公司 | Rotor, generator and wind generating set |
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