WO2009111910A1

WO2009111910A1 - A magnetic suspension windmill which has a vertical shaft

Info

Publication number: WO2009111910A1
Application number: PCT/CN2008/000909
Authority: WO
Inventors: 王誉燕; 杨臣机
Original assignee: Wang Yuyen; Yang Chenchi
Priority date: 2008-03-13
Filing date: 2008-05-08
Publication date: 2009-09-17
Also published as: CN101252301A

Abstract

A magnetic suspension windmill which has a vertical shaft is disclosed, including a windmill body and a generator. The windmill body is mounted on a load bearing flange. The generator includes a casing (1), the vertical shaft (2), a bearing (3), a permanent magnetism rotor, a disk-shaped stator core (7) and a winding. The casing (1) is formed by an upper and a lower supporting plate (11, 12), and a circumferential plate (13) which is located between the upper and lower supporting plates. The upper end of the disk-shaped stator core (7) is fixed on the upper supporting plate (11). The magnetic steel (5) of the permanent magnetism rotor is opposite to the lower end of the disk-shaped stator core (7) and a clearance is provided between them. With the above structure, by using the attraction between the disk-shaped stator core (7) and the magnetic steel (5) of the permanent magnetism rotor, the axial force of the bearing can be overcome, the abrasion of the bearing can be reduced and the service life of the bearing can be prolonged, in the meantime, the friction force of the bearing can be reduced and the mechanical efficiency can be improved.

Description

Magnetic suspension vertical axis windmill

The present invention relates to a vertical axis windmill, and more particularly to a magnetically suspended vertical axis windmill.

Background technique

A variety of vertical axis windmills have been disclosed in the prior art. For example, Chinese Patent No. 200580010406. 7 discloses a cantilever vertical axis windmill which generates less repetitive load on the rotating shaft, has high vibration stability and low noise, and includes an outer wheel that generates rotational torque by wind. The side rotation body, the cantilever type inner wheel side fixing column that supports the outer wheel side rotation body, and the bearing that supports the outer wheel side rotation body and the inner wheel side fixing column at the wind pressure center position on the outer wheel side rotation body.

Chinese Patent No. 200620078636. 9 also discloses a vertical axis windmill comprising a base, a main shaft and blades vertically disposed on the base. At the upper and lower ends of the main shaft, a plurality of blade support plates are horizontally disposed, and the upper and lower blade support plates are opposite to each other, and the blade support plate is provided with a positioning tip bolt, and the end of the blade support plate is provided with a support connecting rod; The blade is rotatably connected to the positioning tip bolt through a top hole provided at an upper and lower end thereof. The vertical axis windmill has a small wind speed, flexible rotation and convenient blade replacement.

In general, the prior art vertical axis windmill includes a windmill body and a generator. The windmill body is mounted on the load bearing flange of the generator, and the generator includes a casing, a vertical shaft, a bearing, a permanent magnet rotor, and a disk stator iron. a core and a winding, the casing is composed of upper and lower support plates arranged up and down, and a surrounding plate between the upper and lower support plates, and the vertical shaft is pivotally connected to the upper and lower support plates via bearings, and the disk stator core Installed in the casing, the upper end of the vertical shaft has a bearing flange, and the bearing flange receives the gravity of the windmill body. However, this vertical axis windmill has problems: the windmill body at the upper end of the vertical shaft has a certain weight, so that

1

Confirmation The bearing is subjected to a large axial force, which increases the wear of the glaze bearing and shortens the service life of the bearing. At the same time, the efficiency of the mechanism is reduced due to the increased frictional force of the bearing, which depletes mechanical energy.

Therefore, it is necessary to provide a vertical axis wind turbine that can reduce bearing wear and extend bearing life. Summary of the invention

It is an object of the present invention to provide a magnetically suspended vertical axis windmill. This magnetically suspended vertical-axis windmill compensates for gravity by magnetic levitation, which not only effectively reduces bearing wear, but also improves mechanical efficiency. The above object of the invention can be achieved by the following technical solutions: a magnetic suspension vertical axis windmill comprising a windmill body and a generator, the windmill body being mounted on a load bearing flange of the generator; the generator comprising a casing, a vertical shaft, a bearing, a radial permanent magnet rotor, a radial stator core and a winding, the casing includes upper and lower support plates arranged up and down, and a coaming plate between the upper and lower support plates, the vertical shaft is pivotally connected to the upper and lower by bearings On the support plate, the radial permanent magnet rotor comprises a magnetic conductive steel cylinder and a magnetic steel, and the radial stator core is fixedly coupled with the casing, the radial permanent magnet rotor is located in the radial stator core and the winding, and the magnetic steel is fixed in the magnetic conductive On the steel cylinder, the magnetic steel cylinder is fixedly coupled with the vertical shaft. Further, the magnetic levitation vertical axis windmill of the present invention is further provided with a magnetic levitation device capable of generating an upward magnetic levitation force against downward gravity.

The above magnetic levitation device can take many forms. Wherein, a specific magnetic levitation device may comprise a bottom case, a permanent magnet and a magnetic chuck disposed outside the generator, wherein the bottom case comprises a bottom plate and a circumferential plate, and the upper end of the circumferential plate is fixedly coupled with the lower support plate, and the circumference The lower end of the plate is fixedly coupled to the bottom plate; the vertical shaft protrudes from the bottom case and is pivotally connected to the bottom plate of the bottom case; the permanent magnet is fixed on the vertical axis in the bottom case, The magnetic chuck is fixed on the lower support plate in the bottom case, or the permanent magnet is fixed on the lower support plate in the bottom case, and the magnetic chuck is fixed on the vertical axis in the bottom case. The mutual attraction of the permanent magnet and the magnetic chuck creates an upward magnetic levitation force.

Preferably, in the above magnetic levitation device, a gap may be disposed between the permanent magnet and the magnetic chuck; the permanent magnet may be fixed on a vertical axis in the bottom case by a connecting mechanism or a supporting mechanism. For example, the support mechanism can be a support plate that is secured to a vertical axis within the bottom housing, and the permanent magnets are secured to the vertical axis within the bottom housing by being secured to the support plate.

In the magnetic levitation vertical axis windmill of the present invention, the permanent magnet may be a one-piece magnet or may be composed of two or more sub-magnets. If the permanent magnet is composed of more than two sub-magnets, the adjacent sub-magnets may have the same magnetic polarity at the surface, or vice versa; preferably, adjacent sub-magnets are in opposite polarity on the surface. Arrange.

Of course, depending on the specific structure of the windmill, particularly the specific structure of the generator, the magnetic levitation device described above may be of other forms, for example, may be disposed inside the generator. The above object of the invention can also be achieved by the following technical solution: a magnetic suspension vertical axis windmill comprising a windmill body and a generator, the windmill body being mounted on a load bearing flange of the generator, the generator comprising a casing, a vertical axis, a bearing, a permanent magnet rotor, a disc stator core and a winding; wherein, the casing comprises upper and lower support plates arranged up and down and a coaming plate between the upper and lower support plates; the permanent magnet rotor comprises a magnetically conductive steel plate And the magnetic steel, the magnetic conductive steel disc is fixed on the vertical shaft; the casing is mounted on the support seat of the vertical pole of the magnetic suspension vertical axis windmill; the vertical shaft is pivotally connected to the upper and lower support plates through the bearing; the disc stator core Installed in the casing, the upper end of the disc stator core is fixed on the upper support plate, the magnetic steel of the permanent magnet rotor corresponds to the lower end of the disc stator core, and the lower end of the permanent magnet rotor and the disc stator core are disposed between gap. In such a windmill, the magnetic levitation force is generated by mutual attraction between the magnetic steel and the disc stator core. Wherein, the disc stator core may have two, one disc stator core is fixed on the upper support plate, the other disc stator core is fixed on the lower support plate, and the two disc stator cores are There is a gap between them, and the magnet of the permanent magnet rotor can be located in the gap between the two disc stator cores. Of course, preferably, the above-mentioned windmill is further provided with a dedicated magnetic levitation device, and the form of such a dedicated magnetic levitation device can be various.

For example, a dedicated magnetic levitation device may be further disposed inside the generator, the magnetic levitation device comprising a permanent magnet and a magnetic chuck, wherein the magnetic chuck is mounted on the upper support plate in the disc stator core, and the permanent magnet is mounted on the guide On the magnet steel plate, and placed opposite the magnetic chuck. Such a permanent magnet may be a monolithic magnet or may be composed of two or more sub-magnets. If the permanent magnet is composed of more than two sub-magnets, the adjacent sub-magnets may have the same magnetic polarity at the surface, or vice versa; preferably, adjacent sub-magnets are in opposite polarity on the surface. Arrange.

For another example, a special magnetic levitation device may be further disposed on the outside of the generator, the magnetic levitation device comprising a bottom case, a permanent magnet and a magnetic chuck; wherein the bottom case comprises a bottom plate and a circumferential plate, and the upper end and the lower support plate of the circumferential plate Fixedly coupled, the lower end of the circumferential plate is fixedly coupled to the bottom plate; the permanent magnet is fixed on the vertical shaft in the bottom case or the lower support plate in the bottom case, and correspondingly, the magnetic chuck is fixed on the lower support plate in the bottom case Or on the vertical axis inside the bottom case. Here, the permanent magnet may be a monolithic magnet or may be composed of two or more sub-magnets. If the permanent magnet is composed of more than two sub-magnets, the adjacent sub-magnets may have the same magnetic polarity at the surface, or vice versa; preferably, adjacent sub-magnets are in opposite polarity on the surface. Arrange.

Preferably, a gap is provided between the permanent magnet and the magnetic chuck.

More preferably, the permanent magnets are fixed to the vertical axis in the bottom casing by a connecting mechanism or a supporting mechanism. For example, the support mechanism may be a support plate that is fixed to a vertical axis within the bottom case, and the permanent magnets are fixed to the vertical axis in the bottom case by being fixed to the support plate. The magnetic suspension vertical axis windmill of the invention utilizes the magnet of the disc stator core and the permanent magnet rotor, and/or the magnetic chuck and the permanent magnet to generate magnetic levitation force, overcomes the axial force of the bearing, and reduces the bearing. The wear and tear increases the mechanical efficiency. The invention is further described below in conjunction with the drawings. However, these specific embodiments are only intended to illustrate the invention in detail, and not to limit the invention. The scope of protection of the invention is defined by the scope of the invention. Moreover, it will be understood that those skilled in the art, based on the present invention, may make some improvements or changes to the specific embodiments of the present invention without any inventive work, but these improved or changed technical solutions still belong to The scope of protection of the present invention. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a first embodiment of the present invention.

Figure 2 is a cross-sectional view showing a second embodiment of the present invention.

Figure 3 is a cross-sectional view showing a third embodiment of the present invention.

Figure 4 is a cross-sectional view showing a fourth embodiment of the present invention. detailed description

Example 1

Figure 1 shows a magnetically suspended vertical axis windmill comprising a windmill body (not shown), a generator. Among them, the generator includes a casing 1, a vertical shaft 2, a bearing 3, a permanent magnet rotor, a disc stator core 7, and a winding. The upper and lower support plates 11, 12 of the casing 1 are arranged up and down, and the upper and lower supports are located The surrounding plate 13 between the strut plates 11 and 12 is formed; the permanent magnet rotor is composed of a magnetic conductive steel plate 4 and a magnetic steel 5, and the magnetic conductive steel plate 4 is fixed on the vertical shaft 2; the casing 1 is mounted on the support of the windmill pole On the seat 15, the vertical shaft 2 is pivotally connected to the upper and lower support plates 11, 12 through the bearing 3; the disc stator core 7 is mounted in the casing 1, and the upper end of the disc stator core 7 is fixed to the upper support plate 11 The utility model further comprises a magnetic conductive steel disk 4, the magnetic conductive steel plate 4 is fixedly coupled with the vertical shaft 2, the magnetic steel plate 5 is fixed on the magnetic conductive steel plate 4, and the magnetic steel 5 corresponds to the lower end of the disk stator core 7, the permanent magnet There is a gap between the magnet steel 5 of the rotor and the lower end surface of the disc stator core 7. A bearing flange 14 is fixed to the upper end of the vertical shaft 2, and the windmill body is mounted on the bearing flange 14. The casing 1 is mounted on a support base 15. Example 2

The solution shown in Fig. 2 is a modification based on the embodiment 1. Different from the embodiment 1, there are two disk stator cores 7, one disk stator core 7 is fixed on the upper support plate 11, and the other A disc stator core 7 is fixed on the lower support plate 12, and there is a gap between the two disc stator cores 7, and the magnetic steel 5 of the permanent magnet rotor is located in the gap between the two disc stator cores 7; The inside of the generator further includes a permanent magnet composed of magnets 61, 62 and a magnetic chuck 8, wherein the magnetic poles of the magnets 61, 62 are opposite in polarity at the upper surface; the magnetic chuck 8 is mounted on the disc stator core 7 On the support plate 11, a permanent magnet is mounted on the magnetic conductive steel disk 4 of the permanent magnet rotor and disposed opposite to the magnetic chuck 8. The magnetic chuck 8 is made of a silicon steel sheet or is made of other magnetically permeable material. Example 3

The solution shown in FIG. 3 is still another modification based on the embodiment 1. Different from the embodiment 1, the disk stator core 7 has two, and a disk stator core 7 is fixed to the upper support plate. 11 on, Another disc stator core 7 is fixed on the lower support plate 12, and there is a gap between the two disc stator cores 7, and the magnetic steel 5 of the permanent magnet rotor is located in the gap between the two disc stator cores 7; Also included on the outside of the generator is a bottom case 9, a permanent magnet composed of magnets 61, 62, and a magnetic chuck 8, wherein the magnets 61, 62 have opposite polarities at the upper surface; the bottom case 9 includes a bottom plate 91 and a circumference To the plate 92, the upper end of the circumferential plate 92 is fixedly coupled to the lower support plate 12, and the lower end is fixedly coupled to the bottom plate 91; the upper end of the magnetic chuck 8 is fixed to the lower support plate 12 in the bottom case 9; a support plate is disposed in the bottom case 9 10, the support plate 10 is fixedly coupled with the vertical shaft 2 in the bottom case 9, and the permanent magnets are fixed on the support plate 10, and the magnetic chuck 8 is disposed opposite to the permanent magnets. Example 4

Figure 4 shows another structure of a magnetically suspended vertical axis windmill comprising a casing 1, a vertical shaft 2, a bearing 3, a radial permanent magnet rotor - a radial stator core 71 and windings. The radial permanent magnet rotor is composed of a magnetic conductive steel cylinder 41 and a magnetic steel 5; the upper and lower support plates 11, 12 of the casing 1 are arranged up and down, and a siding 13 between the upper and lower support plates 11, 12 The vertical shaft 2 is pivotally connected to the upper and lower support plates 11 and 12 through the bearing 3; the radial stator core 71 is fixedly coupled with the casing 1 , that is, fixedly coupled with the enclosure 13 of the casing 1; The rotor is located in the radial stator core 71, and the magnetic steel 5 is mounted on the magnetic conductive steel cylinder 41, and the magnetic conductive steel cylinder 41 is fixedly coupled to the vertical shaft 2. Also included on the outside of the generator is a bottom case 9, a permanent magnet composed of magnets 61, 62, a magnetic chuck 8 and a support disk 10, wherein the magnetic poles of the magnets 61, 62 at the upper surface are opposite in polarity; the bottom case 9 includes The bottom plate 91 and the circumferential plate 92, the upper end of the circumferential plate 92 is fixedly coupled with the lower support plate 12, and the lower end is fixedly coupled with the bottom plate 91; the magnetic chuck 8 is fixed on the lower support plate 12 in the bottom case 1; the support plate 10 is fixed at the bottom Inside the casing 9, the lower part of the vertical shaft 1, the vertical shaft 2 protrudes from the bottom casing 9, and is pivotally connected to the bottom plate 91 of the bottom casing 9, and the permanent magnet is fixed on the support plate 10.

Claims

Rights request

A magnetic suspension vertical axis windmill comprising a windmill body and a generator, the windmill body being mounted on a load bearing flange of the generator, the generator comprising a casing, a vertical shaft, a bearing, a radial permanent magnet a rotor, a radial stator core and a winding, the casing comprising upper and lower support plates arranged up and down and a coaming plate between the upper and lower support plates, the vertical shaft being pivotally connected by the bearing On the upper and lower support plates, the radial permanent magnet rotor includes a magnetic conductive steel cylinder and a magnetic steel, and the radial stator core is fixedly coupled to the casing, and the radial permanent magnet rotor is located at the diameter In the stator core and the winding, the magnetic steel is fixed on the magnetic conductive steel cylinder, and the magnetic conductive steel cylinder is fixedly coupled with the vertical shaft, wherein the magnetic suspension vertical axis windmill is further A magnetic levitation device is provided which is capable of generating an upward magnetic levitation force against downward gravity.

2. The magnetic levitation vertical axis windmill according to claim 1, wherein said magnetic levitation device comprises a bottom case, a permanent magnet and a magnetic chuck disposed outside said generator, wherein said bottom case comprises a bottom plate And a circumferential plate, the upper end of the circumferential plate is fixedly coupled to the lower support plate, the lower end of the circumferential plate is fixedly coupled with the bottom plate; the vertical axis extends out of the bottom case, and The bottom plate of the bottom case is pivotally connected; the permanent magnet is fixed on a vertical axis in the bottom case or a lower support plate in the bottom case, and correspondingly, the magnetic chuck is fixed in the bottom case On the lower support plate or on the vertical axis in the bottom case.

3. The magnetic levitation vertical axis windmill according to claim 2, wherein a gap is provided between the permanent magnet and the magnetic chuck.

4. The magnetic levitation vertical axis windmill according to claim 2, wherein: said permanent magnet is fixed to a vertical axis in said bottom casing by a connecting mechanism or a supporting mechanism.

The magnetic levitation vertical axis windmill according to claim 4, wherein the supporting mechanism is a supporting plate fixed on a vertical axis in the bottom case, and the permanent magnet is fixed by Attached to the support plate is fixed on a vertical axis in the bottom case.

The magnetic levitation vertical axis windmill according to claim 2, wherein the permanent magnet is composed of two or more sub-magnets.

The magnetic levitation vertical axis windmill according to claim 6, wherein each of the adjacent sub-magnets is arranged in such a manner that the surface polarity is opposite.

8. A magnetic levitation vertical axis windmill comprising a windmill body and a generator, the windmill body being mounted on a load bearing flange of the generator, the generator comprising a casing, a vertical shaft, a bearing, a permanent magnet rotor, a disc stator core and a winding; the casing includes upper and lower support plates arranged up and down, and a coaming plate between the upper and lower support plates; the permanent magnet rotor includes a magnetic conductive steel plate and a magnetic steel, The magnetically permeable steel disc is fixed on the vertical shaft; the casing is mounted on a support of the pole of the magnetic levitation vertical axis windmill; and the vertical shaft is supported by the bearing on the upper and lower sides The disk stator core is mounted in the casing, wherein an upper end of the disk stator core is fixed on the upper support plate, and a magnetic steel and a permanent magnet rotor are Corresponding to the lower end of the disc-type stator core, a gap is provided between the permanent magnet rotor and the lower end surface of the disc-type stator core.

9. The magnetic levitation vertical axis windmill according to claim 8, wherein said disk stator core has two, wherein one of said disk stator cores is fixed to said upper support plate, and the other The disc stator core is fixed on the lower support plate, and a gap is disposed between the two disc stator cores, and the magnetic steel of the permanent magnet rotor is located in two of the disc stators Inside the gap between the iron cores.

The magnetic levitation vertical axis windmill according to claim 8, wherein the inside of the generator is further provided with a magnetic levitation device, the magnetic levitation device comprising a permanent magnet and a magnetic chuck, wherein the magnetic chuck is mounted on The upper support plate in the disc stator core is mounted on the magnetic conductive steel disc and disposed opposite to the magnetic chuck.

11. The magnetic levitation vertical axis windmill according to claim 10, wherein the permanent magnet is composed of two or more sub-magnets, and each of the adjacent sub-magnets has an opposite polarity on the surface. The way to arrange.

12. The magnetic levitation vertical axis windmill according to claim 8, wherein the external portion of the generator is further provided with a magnetic levitation device, the magnetic levitation device comprising a bottom case, a permanent magnet and a magnetic chuck; wherein the bottom The shell includes a bottom plate and a circumferential plate, the upper end of the circumferential plate is fixedly coupled to the lower support plate, and the lower end of the circumferential plate is fixedly coupled to the bottom plate; the permanent magnet is fixed in the bottom case On the vertical axis or on the lower support plate in the bottom case, and correspondingly, the magnetic chuck is fixed on the lower support plate in the bottom case or on the vertical axis in the bottom case.

The magnetic levitation vertical axis windmill according to claim 12, wherein a gap is provided between the permanent magnet and the magnetic chuck.

14. The magnetic levitation vertical axis windmill according to claim 12, wherein said permanent magnet is fixed to a vertical axis in said bottom casing by a connecting mechanism or a supporting mechanism.

The magnetic levitation vertical axis windmill according to claim 14, wherein the supporting mechanism is a supporting plate fixed on a vertical axis in the bottom case, and the permanent magnet is fixed by Attached to the support plate is fixed on a vertical axis in the bottom case.

The magnetic levitation vertical axis windmill according to claim 12, wherein the permanent magnet is composed of two or more sub-magnets, and each of the adjacent sub-magnets has an opposite polarity on the surface. The way to arrange.