Rotor magnetic pole structure of permanent magnet wind driven generator

Abstract

The invention discloses a rotor magnetic pole structure of a permanent magnet wind driven generator, relates to the technical field of generator magnetic circuit parts, and aims to solve the problems that the magnetic density of a rotor yoke ring is large and the damage probability of an iron core is increased due to the fact that the contact area of a rotor punching sheet and the rotor yoke ring is small in the background technology. Comprising a mounting ring, a rotor yoke ring and a plurality of connecting frames, T-shaped grooves distributed at equal intervals are formed in the outer wall of the rotor yoke ring, connecting mechanisms distributed at equal intervals are arranged on the outer wall of the rotor yoke ring, and each connecting mechanism comprises two rotor pressing plates, two first sliding blocks fixedly arranged on the outer walls of the bottoms of the two rotor pressing plates respectively and two pull rods. The contact area of the rotor punching sheet and the rotor yoke ring can be increased, and the magnetic density of the rotor yoke ring can be reduced, so that the rotor iron loss can be reduced, the deformation of the outermost edge of the rotor punching sheet can be reduced, the ventilation area between the rotor magnetic pole sections can be increased, the temperature rise can be reduced, and the magnetic poles can be quickly assembled.

Description

Technical Field

[0001] The invention relates to the technical field of generator magnetic circuit components, and in particular to a rotor magnetic pole structure of a permanent magnet wind generator. Background Art

[0002] As a clean and renewable energy source, wind power generation has attracted more and more attention from countries around the world due to its environmental friendliness and good economic benefits. Among the many wind turbine types, permanent magnet wind turbines have become the representative of the new generation of wind turbines due to their light weight, small size, low cost, high efficiency and low maintenance. The magnetic pole structure is a key component of a permanent magnet wind turbine. The magnetic pole structure will greatly affect the magnetic flux density, iron loss, eddy current loss and temperature rise of the motor. At present, most of the rotors on the market use a bread-type rotor punching structure. In this structure, the contact area between the rotor punching and the rotor yoke ring is small, which will lead to a larger magnetic flux density of the rotor yoke ring and increase the probability of core damage. Summary of the invention

[0003] The present invention provides a rotor pole structure of a permanent magnet wind turbine generator, which solves the problem in the prior art that the contact area between the rotor punching and the rotor yoke ring is small, which leads to a large magnetic flux density of the rotor yoke ring and increases the probability of core damage.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A rotor pole structure of a permanent magnet wind turbine comprises a mounting ring, a rotor yoke ring and a plurality of connecting frames, wherein the outer wall of the rotor yoke ring is provided with T-shaped slots distributed at equal distances, and the outer wall of the rotor yoke ring is provided with a connecting mechanism distributed at equal distances, wherein the connecting mechanism comprises two rotor pressure plates, two first sliders respectively fixed on the outer walls of the bottoms of the two rotor pressure plates, and two pull rods with two ends respectively penetrating and slidably sleeved on the outer walls of one side of the two rotor pressure plates, and a plurality of magnetic pole modules are provided on one side of the plurality of rotor pressure plates, and the magnetic pole modules comprise a first rotor punching sheet with a slot on the outer wall of one side, a second slider fixed on the outer wall of the bottom of the first rotor punching sheet, a second rotor punching sheet, a third slider fixed on the outer wall of the bottom of the second rotor punching sheet, a plurality of clamping rods respectively fixed on the outer wall of one side of the second rotor punching sheet, and a plurality of magnetic steels.

[0006] Preferably, an annular mounting groove is provided on the outer wall of the mounting ring, and threaded holes are provided on the inner walls on both sides of the mounting groove at equal distances.

[0007] Preferably, one end of several of the connecting frames is respectively abutted against the inner wall of the rotor yoke ring, and one end of several of the connecting frames is respectively abutted against the inner wall of the mounting groove, several fastening bolts are screwed on the outer walls on both sides of the mounting ring, and several fastening bolts are respectively screwed on the outer walls of one side of several connecting frames.

[0008] Preferably, the two rotor pressure plates are respectively abutted against the outer wall of the rotor yoke ring, and the two first sliding blocks are respectively slidably sleeved in the T-slot, the outer walls at both ends of the two pull rods are threaded with fastening nuts, and the four fastening nuts are respectively abutted against the outer walls of the two rotor pressure plates in pairs.

[0009] Preferably, the second slider and the third slider are respectively slidably mounted in the T-slot, and the third slider abuts against an outer wall of one side of the second slider, a plurality of clamping rods are respectively inserted into the clamping slots, three mounting holes are respectively opened on an outer wall of one side of the first rotor punching sheet and the second rotor punching sheet, and a plurality of magnets are respectively inserted into the three mounting holes.

[0010] Preferably, two fixing rings are provided on both sides of the rotor yoke ring, and the two fixing rings are respectively connected to the outer walls of both sides of the rotor yoke ring by bolts, and one end of a plurality of the connecting frames is respectively connected to the outer wall of one side of the two fixing rings by bolts.

[0011] Through the above scheme, the first rotor punching sheet and the second rotor punching sheet are combined into a whole through the cooperation of the clamping rod and the clamping slot, and then a plurality of magnets are respectively inserted into the mounting holes on the first rotor punching sheet and the second rotor punching sheet to form a magnetic pole module, and the multiple magnetic pole modules are arranged in sequence between the two rotor pressure plates, and two pull rods are used to pass through the two rotor pressure plates and the holes reserved for the multiple magnetic pole modules. The two ends of the two pull rods are locked and fixed with fastening nuts to form an iron core magnetic pole, and the slider on the iron core magnetic pole is passed through the T-slot, and then the whole is fixed with two fixing rings.

[0012] The beneficial effects of the present invention are:

[0013] The clamping rod and the clamping slot cooperate with each other so that the first rotor punching sheet and the second rotor punching sheet are combined into a whole. Then, a plurality of magnets are respectively inserted into the mounting holes on the first rotor punching sheet and the second rotor punching sheet to form a magnetic pole module. The multiple magnetic pole modules are arranged in sequence between the two rotor pressure plates. Two pull rods are used to pass through the holes reserved for the two rotor pressure plates and multiple magnetic pole modules. The two ends of the two pull rods are locked and fixed with fastening nuts to form an iron core pole. The slider on the iron core pole is passed through the T-slot, and then the whole is fixed with two fixing rings. The rotor punching sheet is changed to an extended structure, which can increase the contact area between the rotor punching sheet and the rotor yoke ring, reduce the magnetic density of the rotor yoke ring, and thus reduce the rotor iron loss. The use of an inclination angle will improve the mechanical structure performance of the rotor punching sheet, reduce the deformation of the outermost edge of the rotor punching sheet, and at the same time increase the ventilation area between the rotor magnetic pole segments, reduce temperature rise, and at the same time, the magnetic poles can be assembled quickly, shortening the process cycle and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a schematic diagram of the overall front view of the rotor magnetic pole structure of a permanent magnet wind generator proposed by the present invention.

[0015] Figure 2 The figure is a schematic diagram of the overall cross-sectional structure of a rotor magnetic pole structure of a permanent magnet wind turbine generator proposed by the present invention.

[0016] Figure 3 This is a schematic diagram of the main structure of a mounting ring of a rotor magnetic pole structure of a permanent magnet wind generator proposed by the present invention.

[0017] Figure 4 This is a schematic diagram of the main structure of a rotor yoke ring of a rotor pole structure of a permanent magnet wind generator proposed by the present invention.

[0018] Figure 5 This is a schematic diagram of the front structural view of a connecting frame of a rotor pole structure of a permanent magnet wind generator proposed by the present invention.

[0019] Figure 6 This is a schematic diagram of the front structural view of a connection mechanism of a rotor magnetic pole structure of a permanent magnet wind generator proposed by the present invention.

[0020] Figure 7 This is a front exploded view of a magnetic pole module of a rotor magnetic pole structure of a permanent magnet wind generator proposed by the present invention.

[0021] Figure 8 This is a side exploded view of a magnetic pole module of a rotor magnetic pole structure of a permanent magnet wind generator proposed by the present invention.

[0022] In the figure: 1. mounting ring; 11. mounting groove; 2. rotor yoke ring; 21. T-slot; 3. connecting frame; 4. connecting mechanism; 401. rotor pressure plate; 402. first slider; 403. pull rod; 5. pole module; 501. first rotor punching sheet; 502. second slider; 503. slot; 504. second rotor punching sheet; 505. third slider; 506. clamping rod; 507. magnet; 6. fixing ring. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Example 1, reference Figure 1-5A rotor pole structure of a permanent magnet wind turbine comprises a mounting ring 1 having an annular mounting groove 11 on the outer wall, a rotor yoke ring 2 and a plurality of connecting frames 3, wherein the outer wall of the rotor yoke ring 2 is provided with T-shaped grooves 21 distributed at equal distances, one end of a plurality of connecting frames 3 is respectively abutted against the inner wall of the rotor yoke ring 2, and one end of a plurality of connecting frames 3 is respectively abutted against the inner wall of the mounting groove 11, a plurality of fastening bolts are screwed on the outer walls on both sides of the mounting ring 1, and a plurality of fastening bolts are respectively screwed on the outer walls on one side of a plurality of connecting frames 3, two fixing rings 6 are arranged on both sides of the rotor yoke ring 2, and the two fixing rings 6 are respectively connected to the outer walls on both sides of the rotor yoke ring 2 by bolts, and one end of a plurality of connecting frames 3 is respectively connected to the outer walls on one side of the two fixing rings 6 by bolts.

[0025] Example 2, reference Figure 6-8 , a rotor magnetic pole structure of a permanent magnet wind turbine, further comprising a plurality of connection mechanisms 4 distributed circumferentially on the outer wall of a rotor yoke ring 2, wherein the connection mechanism 4 comprises two rotor pressure plates 401, two first sliders 402 respectively fixed on the outer walls of the bottoms of the two rotor pressure plates 401, and two pull rods 403 respectively penetrating and slidably sleeved on the outer walls of one side of the two rotor pressure plates 401 at both ends, the two rotor pressure plates 401 respectively abut against the outer walls of the rotor yoke ring 2, and the two first sliders 402 are respectively slidably sleeved in the T-slots 21, fastening nuts are screwed on the outer walls of both ends of the two pull rods 403, and the four fastening nuts are respectively abutted against the outer walls of the two rotor pressure plates 401 in pairs, and a plurality of magnetic pole modules 5 are arranged on one side of the plurality of rotor pressure plates 401, and the magnetic pole modules 5 comprise a first rotor punch having a slot 503 opened on the outer wall of one side The first rotor punching sheet 501, the second slider 502 fixed on the outer wall of the bottom of the first rotor punching sheet 501, the second rotor punching sheet 504, the third slider 505 fixed on the outer wall of the bottom of the second rotor punching sheet 504, a plurality of clamping rods 506 and a plurality of magnetic steels 507 respectively fixed on the outer wall of one side of the second rotor punching sheet 504, the second slider 502 and the third slider 505 are respectively slidably sleeved in the T-slot 21, and the third slider 505 abuts against the outer wall of one side of the second slider 502, a plurality of clamping rods 506 are respectively inserted into the clamping groove 503, three mounting holes are respectively opened on the outer wall of one side of the first rotor punching sheet 501 and the second rotor punching sheet 504, and a plurality of magnetic steels 507 are respectively inserted into the three mounting holes, and a plurality of semicircular clamping blocks are fixed on the circumferential outer walls of the two fixing rings 6, and the plurality of clamping blocks are respectively in contact with a plurality of rotor pressure plates 401.

[0026] The clamping rod 506 and the clamping slot 503 cooperate with each other so that the first rotor punching sheet 501 and the second rotor punching sheet 504 are combined into a whole. Then, a plurality of magnets 507 are respectively inserted into the mounting holes on the first rotor punching sheet 501 and the second rotor punching sheet 504 to form a magnetic pole module 5. The multiple magnetic pole modules 5 are arranged in sequence between the two rotor pressure plates 401. Two pull rods 403 are used to pass through the two rotor pressure plates 401 and the holes reserved for the multiple magnetic pole modules 5. The two ends of the two pull rods 403 are locked and fixed with fastening nuts to form an iron core pole. The slider on the iron core pole is passed through the T-slot 21, and then the whole is fixed with two fixing rings 6.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rotor pole structure of a permanent magnet wind turbine generator, comprising a mounting ring (1), a rotor yoke ring (2) and a plurality of connecting frames (3), characterized in that: The outer wall of the rotor yoke ring (2) is provided with T-shaped grooves (21) distributed at equal distances; The outer wall of the rotor yoke ring (2) is provided with connection mechanisms (4) distributed at equal distances, and the connection mechanism (4) comprises two rotor pressure plates (401), two first sliders (402) respectively fixed on the outer walls of the bottoms of the two rotor pressure plates (401), and two pull rods (403) with two ends respectively penetrating and slidably sleeved on the outer walls of one side of the two rotor pressure plates (401); A plurality of magnetic pole modules (5) are provided on one side of the plurality of rotor pressure plates (401), and the magnetic pole modules (5) include a first rotor punching sheet (501) with a slot (503) on the outer wall of one side, a second slider (502) fixed on the outer wall at the bottom of the first rotor punching sheet (501), a second rotor punching sheet (504), a third slider (505) fixed on the outer wall at the bottom of the second rotor punching sheet (504), a plurality of clamping rods (506) respectively fixed on the outer wall of one side of the second rotor punching sheet (504), and a plurality of magnetic steels (507).

2. The rotor pole structure of a permanent magnet wind generator according to claim 1, characterized in that: The outer wall of the mounting ring (1) is provided with a mounting groove (11) of an annular structure, and the inner walls on both sides of the mounting groove (11) are provided with threaded holes distributed at equal distances.

3. The rotor pole structure of a permanent magnet wind generator according to claim 2, characterized in that: One end of a plurality of the connecting frames (3) is respectively abutted against the inner wall of the rotor yoke ring (2), and one end of a plurality of the connecting frames (3) is respectively abutted against the inner wall of the mounting groove (11); a plurality of fastening bolts are screwed on the outer walls on both sides of the mounting ring (1), and a plurality of fastening bolts are respectively screwed on the outer walls on one side of the plurality of the connecting frames (3).

4. The rotor pole structure of a permanent magnet wind generator according to claim 1, characterized in that: The two rotor pressure plates (401) are respectively abutted against the outer wall of the rotor yoke ring (2), and the two first sliders (402) are respectively slidably sleeved in the T-slot (21), and the outer walls at both ends of the two pull rods (403) are both threaded with fastening nuts, and the four fastening nuts are respectively abutted against the outer walls of the two rotor pressure plates (401) in pairs.

5. The rotor pole structure of a permanent magnet wind generator according to claim 1, characterized in that: The second slider (502) and the third slider (505) are respectively slidably mounted in the T-shaped slot (21), and the third slider (505) abuts against an outer wall of one side of the second slider (502). A plurality of clamping rods (506) are respectively inserted into the clamping slots (503). Three mounting holes are respectively opened on the outer walls of one side of the first rotor punching sheet (501) and the second rotor punching sheet (504), and a plurality of magnets (507) are respectively inserted into the three mounting holes.

6. The rotor pole structure of a permanent magnet wind generator according to claim 1, characterized in that: Two fixing rings (6) are provided on both sides of the rotor yoke ring (2), and the two fixing rings (6) are respectively connected to the outer walls of both sides of the rotor yoke ring (2) by bolts, and one end of a plurality of connecting frames (3) is respectively connected to the outer wall of one side of the two fixing rings (6) by bolts.

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