Vertical and horizontal dual-purpose wind power generation wind wheel structure and wind power generator

Abstract

The invention provides a vertical and horizontal dual-purpose wind power generation wind wheel structure and a wind power generator, and relates to the technical field of wind power generation equipment. The vertical and horizontal dual-purpose wind power generation wind wheel structure comprises a main shaft, an inner wind wheel and an outer wind wheel. The inner wind wheel comprises a plurality of resistance type blades distributed around the main shaft, the outer wind wheel comprises a plurality of lift type blades distributed around the main shaft, and therefore the advantages of the two kinds of blades can be considered. The resistance type blade comprises a main body part and an opening part, and the opening part is connected to the end, in the axial direction of the main shaft, of the main body part. The cross section of the main body part is in an arc shape, the curvature radius of the opening part is gradually increased in the direction away from the main body part, and the maximum distance between the opening part and the main shaft is gradually increased. Through the structural arrangement of the resistance type blades, the starting wind speed can be further reduced through the opening parts of the resistance type blades, the main shaft can be started when being vertically placed or horizontally placed, and the vertical and horizontal dual-purpose effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and in particular to a vertical and horizontal dual-purpose wind power generation rotor structure and a wind power generator. Background Art

[0002] A wind turbine is a device that uses wind energy to drive the generator body to rotate and generate electricity. At present, the wind rotor of a vertical axis wind turbine is composed of lift blades or resistance blades, that is, the wind rotor is mainly divided into two types: lift-type wind rotor and resistance-type wind rotor.

[0003] The lift-type wind rotor has a small starting torque. At low wind speeds, it needs other power to start. At present, it is less used in the market than horizontal axis wind turbines and has not yet been large-scaled. The resistance-type wind rotor mainly relies on air resistance to rotate, so that the wind turbine can use wind energy more effectively. Compared with the lift-type wind turbine, it has the advantages of large starting torque and low starting wind speed, but it also has the problem of low output power. The wind energy utilization rate of the two existing wind rotor structures is low, so it is urgent to improve the wind rotor structure to obtain a wind rotor structure that can improve the wind energy utilization rate. Summary of the invention

[0004] The purpose of the present invention is to provide a vertical and horizontal dual-purpose wind turbine rotor structure, which can improve the technical problem of low wind energy utilization rate existing in the prior art.

[0005] Another object of the present invention is to provide a wind turbine generator which can improve the technical problem of low wind energy utilization rate existing in the prior art.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A vertical and horizontal dual-purpose wind turbine generator rotor structure, the vertical and horizontal dual-purpose wind turbine generator rotor structure comprising:

[0008] Spindle;

[0009] An inner wind wheel, the inner wind wheel is mounted on the main shaft, and the inner wind wheel comprises a plurality of resistance-type blades distributed around the main shaft; the resistance-type blade comprises a main body and an open portion, the cross section of the main body is arc-shaped, the open portion is connected to one end of the main body along the axial direction of the main shaft; in a direction away from the main body, the radius of curvature of the open portion increases, and the maximum distance between the open portion and the main shaft increases; and

[0010] An outer wind wheel is installed on the main shaft and is located outside the inner wind wheel; the outer wind wheel includes a plurality of lift-type blades distributed around the main shaft.

[0011] Optionally, the resistance-type blade further includes a retraction portion, which is connected to the other end of the main body along the axial direction of the main axis; and a maximum distance between the retraction portion and the main axis decreases in a direction away from the main body.

[0012] Optionally, the main body portion has a first edge and a second edge distributed circumferentially along the main axis, and the retraction portion has an arc-shaped edge, one end of the arc-shaped edge is connected to the first edge, and the other end of the arc-shaped edge is connected to the second edge; the arc-shaped edge, the first edge and the second edge are coplanar.

[0013] Optionally, the retracted portion is in the shape of a quarter-spherical shell.

[0014] Optionally, the inner wind wheel includes two resistance type blades, and the two resistance type blades are symmetrically distributed around the center of the main axis.

[0015] Optionally, the vertical and horizontal dual-purpose wind turbine rotor structure further includes a connecting rod, one end of which is connected to the main shaft, and the other end of which is connected to the resistance-type blade.

[0016] Optionally, there are multiple connecting rods, and the multiple connecting rods are distributed side by side and spaced apart along the axial direction of the main shaft, and the connecting rods are connected to the edges of the resistance-type blades.

[0017] Optionally, the lift-type blade is in a strip shape; both ends of the lift-type blade are respectively connected to the main shaft, and the connection between the lift-type blade and the main shaft is located on the outside of the drag-type blade.

[0018] Optionally, the outer wind wheel includes three lift-type blades, and the three lift-type blades are evenly distributed around the axis of the main shaft.

[0019] A wind turbine generator comprises a power generation body and the vertical and horizontal dual-purpose wind turbine rotor structure.

[0020] The beneficial effects of the vertical and horizontal dual-purpose wind turbine rotor structure and wind turbine generator provided by the embodiments of the present invention include:

[0021] The embodiment of the present invention provides a vertical and horizontal dual-purpose wind turbine rotor structure, which includes a main shaft, an inner rotor and an outer rotor. The inner rotor includes a plurality of resistance-type blades distributed around the main shaft, and the outer rotor includes a plurality of lift-type blades distributed around the main shaft. The resistance-type blade includes a main body and an opening portion, and the opening portion is connected to one end of the main body along the axial direction of the main shaft. The cross section of the main body is arc-shaped, and the radius of curvature of the opening portion increases in the direction away from the main body, and the maximum distance between the opening portion and the main shaft increases. On the one hand, the vertical and horizontal dual-purpose wind turbine rotor structure has both resistance-type blades and lift-type blades, so it can take into account the advantages of both blades. Compared with a pure lift-type rotor, the inner rotor can also be easily started under low wind speed conditions, and has a higher output power compared with a pure resistance-type rotor. On the other hand, through the structural setting of the resistance-type blade, not only can the starting wind speed be further reduced by the opening portion of the resistance-type blade, but also it can be started when the main shaft is placed vertically or horizontally, achieving the effect of vertical and horizontal dual-purpose.

[0022] The embodiment of the present invention further provides a wind turbine generator, which includes the vertical and horizontal dual-purpose wind turbine generator rotor structure. Since the wind turbine generator includes the vertical and horizontal dual-purpose wind turbine generator rotor structure, it also has the advantages of being able to take into account both the lift-type wind turbine rotor and the resistance-type wind turbine rotor, can be started under low wind speed conditions, and can be started when the main shaft is placed vertically or horizontally, achieving the technical effect of vertical and horizontal dual-purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0024] Figure 1 A schematic structural diagram of a vertical and horizontal dual-purpose wind turbine generator rotor structure provided according to one aspect of the present invention is shown;

[0025] Figure 2 A schematic structural diagram of a resistance-type blade in a vertical and horizontal dual-purpose wind turbine rotor structure provided according to one aspect of the present invention at a first viewing angle is shown;

[0026] Figure 3 A schematic structural diagram of a resistance-type blade in a vertical and horizontal dual-purpose wind turbine rotor structure provided according to one aspect of the present invention at a second viewing angle is shown;

[0027] Figure 4 A schematic structural diagram of a resistance-type blade in a vertical and horizontal dual-purpose wind turbine rotor structure provided according to one aspect of the present invention is shown at a third viewing angle.

[0028] Reference numerals:

[0029] 100-wind wheel structure; 110-main shaft; 111-bearing; 120-inner wind wheel; 121-resistance type blade; 122-main body; 1221-first edge; 1222-second edge; 123-opening portion; 1231-third edge; 1232-fourth edge; 1233-upper edge; 124-retraction portion; 1241-arc edge; 130-outer wind wheel; 131-lift type blade; 132-first connection position; 133-second connection position; 140-connecting rod. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0031] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Figure 1 The schematic diagram of the structure of the vertical and horizontal dual-purpose wind turbine generator rotor structure provided by this embodiment is shown. Figure 2 The structure schematic diagram of the resistance-type blades in the vertical and horizontal dual-purpose wind turbine rotor structure provided by this embodiment at a first viewing angle is shown. Figure 3 The structure schematic diagram of the resistance-type blades in the vertical and horizontal dual-purpose wind turbine rotor structure provided by this embodiment at a second viewing angle is shown. Figure 4The schematic diagram of the structure of the resistance-type blades in the vertical and horizontal dual-purpose wind turbine rotor structure provided by this embodiment at a third viewing angle is shown. Figure 1-Figure 4 The present embodiment provides a vertical and horizontal wind turbine rotor structure (hereinafter referred to as the rotor structure 100), and accordingly, also provides a wind turbine generator (not shown).

[0035] The wind turbine generator includes a wind rotor structure 100 and a power generation body. Specifically, the power generation body can generally be configured to include a stator and a rotor, and power generation is achieved by cutting magnetic flux lines through the rotation of the rotor in the stator. The main shaft 110 of the wind rotor structure 100 is fixedly connected to the rotor, so that the rotation of the wind rotor structure 100 driven by wind drives the rotor to rotate relative to the stator, thereby achieving wind power generation.

[0036] The wind wheel structure 100 includes a main shaft 110, an inner wind wheel 120 and an outer wind wheel 130. The inner wind wheel 120 includes a plurality of resistance-type blades 121 distributed around the main shaft 110, and the outer wind wheel 130 includes a plurality of lift-type blades 131 distributed around the main shaft 110. The resistance-type blade 121 includes a main body 122 and an open portion 123, and the open portion 123 is connected to one end of the main body 122 along the axial direction of the main shaft 110. The cross section of the main body 122 is arc-shaped, and the curvature radius of the open portion 123 increases in the direction away from the main body 122, and the maximum distance between the open portion 123 and the main shaft 110 increases. On the one hand, the wind wheel structure 100 has both the resistance-type blades 121 and the lift-type blades 131, so it can take into account the advantages of both blades. Compared with a pure lift-type wind wheel, the inner wind wheel 120 can be easily started even at low wind speeds, and has a higher output power than a pure resistance-type wind wheel. On the other hand, by setting the structure of the resistance-type blades 121, not only can the start-up wind speed be further reduced by the opening portion 123 of the resistance-type blades 121, but it can also be started when the main shaft 110 is placed vertically or horizontally, achieving a vertical and horizontal dual-use effect, such as Figure 1 The structure of the main shaft 110 when placed vertically is shown. In other words, Figure 1 The wind wheel structure 100 shown is a structure for use vertically.

[0037] In this embodiment, the main shaft 110 is a rod-shaped member. Optionally, the inner wind wheel 120 includes two resistance-type blades 121, and the two resistance-type blades 121 are symmetrically distributed around the center of the main shaft 110. Optionally, the outer wind wheel 130 includes three lift-type blades 131, and the three lift-type blades 131 are evenly distributed around the axis of the main shaft 110, that is, the central angle corresponding to two adjacent lift-type blades 131 is 120°.

[0038] It should be noted that the number of the resistance-type blades 121 and the lift-type blades 131 is not limited here. It can be understood that in other embodiments, the number of blades can also be set according to needs.

[0039] Furthermore, the lift-type blade 131 is a strip-shaped blade, and both ends of the lift-type blade 131 are respectively connected to the main shaft 110, and the connection between the lift-type blade 131 and the main shaft 110 is located outside the resistance-type blade 121. Specifically, the connection between both ends of the lift-type blade 131 and the main shaft 110 is respectively a first connection position 132 and a second connection position 132, and the projection of the resistance-type blade 121 on the main shaft 110 is located between the first connection position 132 and the second connection position 132. Specifically, the wind wheel structure 100 also includes a bearing 111 disposed on the main shaft 110, and the second connection position 132 is located on the bearing 111. In other words, the lower end of the lift-type blade 131 is rotatably connected to the main shaft 110 through the bearing 111, and the upper end of the lift-type blade 131 is directly fixedly connected to the main shaft 110.

[0040] Please continue to refer to Figure 1-Figure 4 In this embodiment, the resistance type blade 121 is a thin-walled structure, and the structure shape of the inner wall surface and the outer wall surface is basically the same. The main body 122 of the resistance type blade 121 is an arc shape as a whole, which can be regarded as the arc shape of its cross section along the up and down direction (such as Figure 1 The main body 122 is obtained by stretching the main body 122 (as shown in FIG. 1 ), and the inner and outer circumferential surfaces are both cylindrical surfaces, and the central angle corresponding to the cylindrical surface can be set to 180°. Specifically, the main body 122 of the resistance-type blade 121 has a first edge 1221 and a second edge 1222 distributed along the circumference of the main axis 110, and the first edge 1221 and the second edge 1222 are used to form the two ends of the arc of its cross section, and the first edge 1221 and the second edge 1222 are located in the same vertical plane.

[0041] It should be noted that, in the description of this embodiment, positions such as “upper”, “lower”, and “vertical” only represent positions where the wind wheel structure 100 is in a vertical state.

[0042] The opening portion 123 is disposed at the upper end of the main body portion 122 and is arranged in a direction away from the main body portion 122. Figure 1In the vertically upward direction, the radius of curvature of the opening portion 123 increases, and at the same time, the distance between the opening portion 123 and the main axis 110 increases, that is, the higher the opening portion 123 is, the more the opening portion 123 expands outward in the radially outward direction of the main axis 110. Further, the opening portion 123 has an upper edge 1233, a third edge 1231 and a fourth edge 1232 connected in sequence, the third edge 1231 is connected above the first edge 1221, and the fourth edge 1232 is connected above the second edge 1222. The upper edge 1233 is located at the top of the opening portion 123, and one end of the upper edge 1233 is smoothly connected to the third edge 1231 through a rounded corner, and the other end of the upper edge 1233 is smoothly connected to the fourth edge 1232 through a rounded corner.

[0043] Furthermore, the resistance type blade 121 further includes a retracted portion 124, which is connected to the other end of the main body 122 along the axial direction of the main shaft 110. In other words, the retracted portion 124 and the open portion 123 are respectively connected to the two ends of the main body 122 along the axial direction of the main shaft 110. In the direction away from the main body, the maximum distance between the retracted portion 124 and the main shaft 110 decreases. In this way, the resistance type blade 121 forms a petal-like shape, and the entire inner wind wheel 120 is in a flower shape.

[0044] Specifically, the retracted portion 124 is disposed at the lower end of the main body 122. The retracted portion 124 has an arcuate edge 1241, one end of the arcuate edge 1241 is connected to the first edge 1221, the other end of the arcuate edge 1241 is connected to the second edge 1222, and the arcuate edge 1241, the first edge 1221 and the second edge 1222 are coplanar.

[0045] Optionally, the retracted portion 124 is in the shape of a quarter-spherical shell.

[0046] In this embodiment, the wind wheel structure 100 also includes a connecting rod 140, one end of the connecting rod 140 is connected to the main shaft 110, and the other end of the connecting rod 140 is connected to the resistance type blade 121, thereby connecting the resistance type blade 121 to the main shaft 110. When the resistance type blade 121 rotates under the drive of wind, the rotation of the resistance type blade 121 drives the rotation of the main shaft 110, and then drives the lift type blade 131 to rotate accordingly, thereby starting the wind wheel structure 100.

[0047] Furthermore, there are multiple connecting rods 140, which are spaced and arranged side by side along the axial direction of the main shaft 110, and the connecting rods 140 are connected to the edges of the resistance type blades 121. Specifically, the first edge 1221, the third edge 1231 and the part of the arc edge 1241 of the resistance type blade 121 form one side edge of the resistance type blade 121, and the second edge 1222, the fourth edge 1232 and the other part of the arc edge 1241 form the other side edge of the resistance type blade 121, and the two side edges are respectively connected to multiple connecting rods 140. In other words, each resistance type blade 121 is connected to the main shaft 110 through two rows of connecting rods 140.

[0048] The vertical and horizontal dual-purpose wind turbine generator structure 100 and wind turbine generator provided by the embodiment of the present invention are used. When the wind speed is low, the inner wind turbine 120 is started by the torque generated by the resistance blades 121, and then drives the outer wind turbine 130 to rotate and start. When the outer wind turbine 130 is started, the output power is mainly generated by the lift blades 131. In this way, compared with a simple lift-type wind turbine, the starting wind speed requirement of the lift blades 131 is reduced. Compared with a simple resistance-type wind turbine, the wind turbine structure 100 can generate a higher output power. In this way, the vertical and horizontal dual-purpose wind turbine generator structure 100 takes into account the advantages of both wind turbines and can obtain a higher wind energy utilization rate. At the same time, through the structural design of the resistance blades 121, the wind turbine structure 100 can have a better wind energy utilization performance in an unsteady flow field, and at the same time, the wind turbine structure 100 can be started and operated when the axis of the main shaft 110 is set vertically or the axis of the main shaft 110 is set horizontally, that is, the vertical and horizontal dual-purpose effect is achieved. Moreover, the wind wheel structure 100 provided in this embodiment also has the effect of a short main shaft 110, which helps to lower the center of gravity of the wind wheel structure 100, reduce the overall weight of the wind wheel, reduce the vibration of the blades during the operation of the wind wheel structure 100, reduce energy loss, and increase service life.

[0049] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in the field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A vertical and horizontal wind turbine generator rotor structure, characterized in that: The vertical and horizontal dual-purpose wind turbine generator rotor structure comprises: Spindle; An inner wind wheel, the inner wind wheel is mounted on the main shaft, and the inner wind wheel comprises a plurality of resistance-type blades distributed around the main shaft; the resistance-type blade comprises a main body and an open portion, the cross section of the main body is arc-shaped, the open portion is connected to one end of the main body along the axial direction of the main shaft; in a direction away from the main body, the radius of curvature of the open portion increases, and the maximum distance between the open portion and the main shaft increases; and An outer wind wheel is installed on the main shaft and is located outside the inner wind wheel; the outer wind wheel includes a plurality of lift-type blades distributed around the main shaft.

2. The vertical and horizontal dual-purpose wind turbine generator structure according to claim 1 is characterized in that: The resistance-type blade further includes a retraction portion connected to the other end of the main body along the axial direction of the main axis; along a direction away from the main body, a maximum distance between the retraction portion and the main axis decreases.

3. The vertical and horizontal dual-purpose wind turbine generator structure according to claim 2 is characterized in that: The main body has a first edge and a second edge distributed along the circumference of the main axis, and the retracted portion has an arcuate edge, one end of the arcuate edge is connected to the first edge, and the other end of the arcuate edge is connected to the second edge; the arcuate edge, the first edge and the second edge are coplanar.

4. The vertical and horizontal dual-purpose wind turbine generator structure according to claim 2 is characterized in that: The retracted portion is in a quarter spherical shell shape.

5. The vertical and horizontal dual-purpose wind turbine generator structure according to claim 1 is characterized in that: The inner wind wheel includes two resistance-type blades, and the two resistance-type blades are symmetrically distributed around the center of the main axis.

6. The vertical and horizontal wind turbine generator structure according to claim 1 is characterized in that: The vertical and horizontal dual-purpose wind turbine rotor structure also includes a connecting rod, one end of which is connected to the main shaft, and the other end of which is connected to the resistance-type blade.

7. The vertical and horizontal wind turbine generator structure according to claim 6 is characterized in that: There are multiple connecting rods, which are distributed side by side and spaced apart along the axial direction of the main shaft, and the connecting rods are connected to the edges of the resistance-type blades.

8. The vertical and horizontal wind turbine generator structure according to claim 1 is characterized in that: The lift-type blade is in a strip shape; both ends of the lift-type blade are respectively connected to the main shaft, and the connection between the lift-type blade and the main shaft is located outside the resistance-type blade.

9. The vertical and horizontal dual-purpose wind turbine generator structure according to claim 1 is characterized in that: The outer wind wheel includes three lift-type blades, and the three lift-type blades are evenly distributed around the axis of the main shaft.

10. A wind turbine generator, characterized in that: The wind turbine generator comprises a power generation body and a vertical and horizontal dual-purpose wind turbine rotor structure as described in any one of claims 1 to 9.

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