Generator of vertical axis wind power generation device

Abstract

A generator of a vertical axis wind power generation device comprises a stator and a rotor. The stator comprises a shell seat, a fixed seat arranged in the shell seat, and a plurality of coil windings which are annularly arranged on the fixed seat at intervals. The rotor comprises a shell cover, a bearing seat, a rotating shaft, a plurality of inner magnets and a plurality of outer magnets, wherein the inner magnets are annularly arranged on the bearing seat at intervals and are surrounded by the coil winding, and the outer magnets are annularly arranged on the bearing seat at intervals and are surrounded by the coil winding. When the rotor rotates, the inner magnet and the outer magnet can synchronously rotate relative to the coil winding from the inner side and the outer side, and therefore large induced electromotive force is generated, and under the condition that the rotating shaft rotates at a low speed, sufficient electric energy is still generated for power generation.

Description

Technical Field

[0001] The utility model relates to a generator, in particular to a generator of a vertical axis wind power generation device. Background Art

[0002] See also Figure 1 The vertical axis wind turbine 1 is a type of wind turbine, wherein the shaft 11 is perpendicular to the direction of the wind, and the blades 12 are arranged at intervals around the shaft. The advantage of the vertical axis wind turbine 1 is that it can operate without being aligned with the wind direction, so many complex mechanical adjustment devices can be eliminated to align the blades 12 with the wind direction, and stable and reliable power generation efficiency can be achieved in environments with large changes in wind direction or wind speed such as turbulence or gusts. A general vertical axis wind turbine 1 requires the shaft 11 to be connected to a generator 13, and the generator 13 converts the rotational kinetic energy of the shaft 11 into electrical energy for output or storage.

[0003] The generator 13 generally used in the vertical axis wind turbine 1 is composed of a rotor 131 and a stator 132. The rotor 131 is connected to the rotating shaft 11 and rotates with the rotating shaft 11, and the rotor 131 is composed of multiple annular silicon steel sheets stacked into a tubular shape, and a circle of multiple permanent magnets (permanent magnets) are arranged on the annular silicon steel sheets, while the stator 132 is not connected to the rotating shaft 11 and does not rotate with the rotating shaft 11. A circle of excitation coils is arranged in the stator 132, and electrical energy can be generated by the relative rotation of the permanent magnets and the excitation coils. However, due to the heavy weight of the silicon steel sheets and the limited electromotive force that can be generated between the permanent magnets and the excitation coils, the generator 13 needs to reach a speed of more than 500RPM on the rotating shaft 11 to generate electricity, which results in a lot of low-intensity but more stable wind being wasted. At the same time, using silicon steel sheets as the main body of the rotor 131 also has the disadvantages of high cost and manufacturing difficulty. Utility Model Content

[0004] The utility model aims to provide a generator which can generate electricity even when the rotation speed is low.

[0005] The utility model discloses a generator of a vertical axis wind power generation device; the generator comprises a stator and a rotor, the stator comprises an outer shell seat surrounding an inner space with an opening facing upward, a fixing seat arranged in the outer shell seat and made of engineering plastic, and a plurality of coil windings arranged on the fixing seat in an annular manner and spaced apart from each other, the rotor comprises an outer shell cover arranged on the outer shell seat, a bearing seat coaxially arranged below the outer shell cover and located in the inner space, a rotating shaft passing through the outer shell cover and extending into the inner space, a plurality of inner magnets arranged on the bearing seat in an annular manner and spaced apart from each other and surrounded by the coil winding, and a plurality of inner magnets arranged on the bearing seat in an annular manner and spaced apart from each other. The outer magnet is annularly arranged on the support seat at intervals and surrounds the coil winding. The rotating shaft is rotatably arranged on the outer shell seat and the outer shell cover, and can drive the support seat to rotate relative to the outer shell seat and the outer shell cover. The support seat has an annular shell, an inner frame arranged in the annular shell and made of engineering plastic, and an outer frame arranged in the annular shell and made of engineering plastic and surrounding the inner frame. The inner frame defines a plurality of inner setting spaces which are arranged in annular shapes and are respectively provided for the inner magnets to be provided, and the outer frame defines a plurality of outer setting spaces which are arranged in annular shapes and are respectively provided for the outer magnets to be provided.

[0006] The generator of the vertical axis wind power generation device described in the utility model, the outer support frame of the rotor has an outer base wall portion arranged on the annular shell and axially penetrated by the rotating shaft, and a plurality of partition portions protruding downward from the outer peripheral edge of the outer base wall portion and annularly spaced from each other to define the outer setting space.

[0007] The generator of the vertical axis wind power generation device described in the utility model, the inner support frame of the rotor comprises an inner base wall portion arranged on the outer base wall portion and axially penetrated by the rotating shaft, an annular wall portion extending downward from the inner base wall portion and surrounded by the outer magnet, and a plurality of protrusion portions annularly spaced from each other and radially protruding from the annular wall portion toward the partition portion, respectively, the protrusion portions cooperate with each other to define the inner setting space respectively located radially on the inner side of the outer setting space.

[0008] The generator of the vertical axis wind power generation device described in the utility model, the annular shell of the rotor has a top wall portion coaxially fixed with the inner base wall portion of the inner support frame and the outer base wall portion of the outer support frame, and a side wall portion extending downward from the outer periphery of the top wall portion to surround the inner support frame and the outer support frame.

[0009] The generator of the vertical axis wind power generation device described in the utility model, the fixed seat of the stator has a seat wall portion fixed on the outer shell seat, a vertical wall portion extending upward from the seat wall portion and in a ring shape, a plurality of protruding portions annularly spaced from each other and protruding radially outward from the vertical wall portion, and a plurality of retaining wall portions respectively arranged at one end of the protruding portion not connected to the vertical wall portion and extending in the circumferential direction, and the coil windings are respectively wound on the protruding portions.

[0010] In the generator of the vertical axis wind power generation device of the utility model, the length of each retaining wall portion of the stator in the circumferential direction is greater than the length of the provided protruding portion in the circumferential direction.

[0011] The beneficial effect of the utility model is that when the rotor rotates, the inner magnet and the outer magnet will rotate synchronously relative to the coil winding from the inner and outer sides, thereby generating a large induced electromotive force, so that when the shaft rotates at a low speed, it is still sufficient to generate electrical energy for power generation. In addition, the outer support frame, the inner support frame, and the fixing seat are made of engineering plastics that are lighter than silicon steel sheets, which can not only reduce costs and manufacturing difficulties, but also reduce the torque required to drive the rotor to rotate, which is beneficial for the vertical axis wind power generation device to generate electricity under low wind speed conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram illustrating a general vertical axis wind turbine;

[0013] Figure 2 is a three-dimensional exploded view illustrating an embodiment of a generator of a vertical axis wind power generation device of the utility model;

[0014] Figure 3 is a side view, showing Figure 2 Side view cross-section along the radial direction;

[0015] Figure 4 is a perspective view illustrating a fixing seat in the embodiment;

[0016] Figure 5 is a perspective view illustrating the inner support frame in the embodiment;

[0017] Figure 6 is a perspective view illustrating an outer support frame in the embodiment;

[0018] Figure 7 is a perspective view illustrating an exemplary embodiment of a vertical axis wind power generation device to which the embodiment can be applied;

[0019] Figure 8 It is a top view illustrating the vertical axis wind power generation device with a wind guide plate added thereto. DETAILED DESCRIPTION

[0020] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0021] See also Figure 2 , Figure 3 ,and Figure 4 The embodiment of the generator 3 of the vertical axis wind power generation device of the utility model comprises a stator 4 and a rotor 5. The stator 4 and the rotor 5 are coaxially arranged, so the radial and circumferential directions of the two are the same. Therefore, the axial, radial and circumferential directions mentioned in this embodiment can be applied to the stator 4 and the rotor 5, but it should not be limited to this. The stator 4 includes a housing seat 41, a fixing seat 42 arranged in the housing seat 41, and a plurality of coil windings 43 (only shown in FIG. 1 ) arranged on the fixing seat 42 in an annular manner and spaced apart from each other. Figure 3 ). The outer shell seat 41 surrounds an inner space 411 with an opening facing upward. The fixed seat 42 is located in the inner space 411 and has a seat wall portion 421 locked on the outer shell seat 41, a vertical wall portion 422 extending upward from the seat wall portion 421 and in an annular shape, a plurality of protruding portions 423 annularly spaced from each other and protruding radially outward from the vertical wall portion 422, and a plurality of retaining wall portions 424 respectively arranged at one end of the protruding portion 423 not connected to the vertical wall portion 422 and extending circumferentially. The length of each retaining wall portion 424 in the circumferential direction is greater than the length of the provided protruding portion 423 in the circumferential direction. The coil windings 43 are respectively wound on the protruding portions 423, and each coil winding 43 is radially limited between the vertical wall portion 422 and the corresponding retaining wall portion 424.

[0022] The rotor 5 includes a housing cover 51 covering the housing seat 41, a bearing seat 52 coaxially arranged below the housing cover 51 and located in the internal space 411, a rotating shaft 53 passing through the housing cover 51 and extending into the internal space 411, a plurality of inner magnets 54 arranged on the bearing seat 52 at intervals in annular shape and surrounded by the coil winding 43, and a plurality of outer magnets 55 arranged on the bearing seat 52 at intervals in annular shape and surrounded by the coil winding 43. Most of the housing cover 51 covers the housing seat 41 and is located outside the internal space 411.

[0023] See also Figure 3 , Figure 5 ,and Figure 6The bearing seat 52 has a ring housing 56, an outer frame 57 disposed in the ring housing 56, and an inner frame 58 disposed in the ring housing 56. The outer frame 57 has an outer base wall portion 571 locked on the ring housing 56, and a plurality of partitions 573 protruding downward from the outer periphery of the outer base wall portion 571 and annularly spaced from each other to define a plurality of outer setting spaces 572. The outer setting spaces 572 surround the coil winding 43 and respectively accommodate the outer magnets 55. The inner frame 58 has an inner base wall portion 581 disposed on the outer base wall portion 571, an annular wall portion 582 extending downward from the inner base wall portion 581 and surrounded by the outer magnets 55, and a plurality of protrusions 583 annularly spaced from each other and protruding from the annular wall portion 582 toward the partitions 573 in the radial direction. The protrusions 583 cooperate with each other to define a plurality of inner spaces 584 respectively located radially inside the outer space 572 and used to accommodate the inner magnets 54. The ring housing 56 has a top wall 561 coaxially fixed with the inner base wall 581 and the outer base wall 571, and a side wall 562 extending downward from the outer periphery of the top wall 561 to surround the inner support frame 58 and the outer support frame 57. The inner magnet 54 and the outer magnet 55 are respectively located radially inside and outside the coil winding 43.

[0024] The upper and lower ends of the rotating shaft 53 are rotatably fixed to the outer shell cover 51 and the outer shell seat 41 through two bearings, respectively, and the rotating shaft 53 passes through the outer shell cover 51, the top wall portion 561, the outer base wall portion 571, the inner base wall portion 581, and the seat wall portion 421 in order from top to bottom in the axial direction, and extends into the outer shell seat 41. In the manufacturing of this embodiment, a keyway A can be provided which passes through the ring housing 56, the outer base wall portion 571, and the inner base wall portion 581 in the axial direction, and a key (not shown) connected to the rotating shaft 53 is clamped in the keyway A, so that when the rotating shaft 53 rotates, it can drive the bearing seat 52 to rotate relative to the outer shell cover 51 and the stator 4, and the inner magnet 54 and the outer magnet 55 can rotate synchronously relative to the coil winding 43 from the inner and outer sides.

[0025] See also Figure 2 , Figure 7 ,and Figure 8 The rotating shaft 53 can be coaxially connected with the shaft body 61 of a vertical axis wind power generation device 6 so that the two can rotate synchronously, and the vertical axis wind power generation device 6 can also be as Figure 8As shown, a plurality of wind deflectors 62 are provided on the outer ring. The table below is a performance test of this embodiment at different rotation speeds. From the data in the table, it can be seen that this embodiment can operate at a low rotation speed of 100RPM to generate electricity, and thus can also operate under low wind speed conditions, greatly improving versatility. Figure 2 and Figure 3 In this embodiment, the fixing seat 42, the outer support frame 57, and the inner support frame 58 are made of engineering plastic (also known as polyoxymethylene, abbreviated as POM), which is easy to process and light in weight.

[0026]

[0027] In summary, when the rotor 5 rotates, the inner magnet 54 and the outer magnet 55 will rotate synchronously relative to the coil winding 43 from the inner and outer sides, thereby generating a large induced electromotive force. Therefore, when the shaft 53 rotates at a low speed, it is still sufficient to generate electrical energy for power generation. In addition, the outer support frame 57, the inner support frame 58, and the fixing seat 42 are made of engineering plastics that are lighter than silicon steel sheets. In addition to reducing costs and manufacturing difficulties, they can also reduce the torque required to drive the rotor 5 to rotate, which is beneficial for the vertical axis wind power generation device 6 to generate electricity under low wind speed conditions, so the purpose of this utility model can be achieved.

Claims

1. A generator of a vertical axis wind power generation device; the generator comprises a stator and a rotor, characterized in that: The stator includes an outer shell seat surrounding an inner space with an opening facing upward, a fixing seat arranged in the outer shell seat and made of engineering plastic, and a plurality of coil windings arranged on the fixing seat in an annular manner and spaced apart from each other. The rotor includes an outer shell cover arranged on the outer shell seat, a bearing seat coaxially arranged below the outer shell cover and located in the inner space, a rotating shaft passing through the outer shell cover and extending into the inner space, a plurality of inner magnets arranged on the bearing seat in an annular manner and spaced apart from each other and surrounded by the coil windings, and a plurality of inner magnets arranged on the bearing seat in an annular manner and spaced apart from each other. And surrounding the outer magnet of the coil winding, the rotating shaft is rotatably arranged on the outer shell seat and the outer shell cover, and can drive the supporting seat to rotate relative to the outer shell seat and the outer shell cover, the supporting seat has an annular shell body, an inner supporting frame arranged in the annular shell body and made of engineering plastic, and an outer supporting frame arranged in the annular shell body and made of engineering plastic and surrounding the inner supporting frame, the inner supporting frame defines a plurality of inner setting spaces arranged in an annular shape and respectively for the inner magnets to be arranged, and the outer supporting frame defines a plurality of outer setting spaces arranged in an annular shape and respectively for the outer magnets to be arranged.

2. The generator of the vertical axis wind power generation device according to claim 1, characterized in that: The outer support frame of the rotor comprises an outer base wall portion which is arranged on the ring housing and axially penetrated by the rotating shaft, and a plurality of partition portions which protrude downward from the outer periphery of the outer base wall portion and are annularly spaced from each other to define the outer setting space.

3. The generator of the vertical axis wind power generation device according to claim 2, characterized in that: The inner support frame of the rotor comprises an inner base wall portion which is arranged on the outer base wall portion and is axially penetrated by the rotating shaft, an annular wall portion which extends downward from the inner base wall portion and is surrounded by the outer magnet, and a plurality of protrusion portions which are annularly spaced from each other and radially protrude from the annular wall portion toward the partition portion, respectively. The protrusion portions cooperate with each other to define the inner setting space which is radially located on the inner side of the outer setting space.

4. The generator of the vertical axis wind power generation device according to claim 3, characterized in that: The annular housing of the rotor comprises a top wall portion coaxially fixed with the inner base wall portion of the inner frame and the outer base wall portion of the outer frame, and a side wall portion extending downward from the outer periphery of the top wall portion to surround the inner frame and the outer frame.

5. The generator of the vertical axis wind power generation device according to claim 1, characterized in that: The fixed seat of the stator comprises a seat wall portion fixed on the outer shell seat, a vertical wall portion extending upward from the seat wall portion and in an annular shape, a plurality of protruding portions which are annularly spaced from each other and protrude radially outward from the vertical wall portion, and a plurality of retaining wall portions which are respectively arranged at one end of the protruding portions which is not connected to the vertical wall portion and extend in the circumferential direction, and the coil windings are respectively wound on the protruding portions.

6. The generator of the vertical axis wind power generation device according to claim 5, characterized in that: The length of each retaining wall portion of the stator in the circumferential direction is greater than the length of the protruding portion in the circumferential direction.

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