Vertical axis wind turbine and wind power generation device comprising same

Abstract

The utility model discloses a vertical axis wind turbine and a wind power generation device comprising the vertical axis wind turbine. The vertical axis wind turbine comprises a column shaft, a vertical axis impeller, an impeller support and a streaming arc plate. A column shaft is rotatably arranged on the impeller support in a penetrating mode, a streaming arc plate is fixed to the front face of the impeller support, the concave face of the streaming arc plate faces the column shaft, and a vertical shaft impeller arranged on the side portion of the column shaft is installed on the impeller support. The wind power generation device comprises a generator and an energy storage battery. The vertical-axis impeller has the advantages that the overall wind resistance of the vertical-axis impeller is reduced by utilizing the streaming arc plates, the downwind rotation speed of the vertical-axis impeller is increased, and the wind energy conversion efficiency and the output power are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power generation equipment technical field, especially vertical axis wind turbine and contain the wind power generation device of this wind turbine. BACKGROUND

[0002] The device with the generator as the load on the wind turbine is called wind turbine generator, and is called wind turbine without the generator load.

[0003] The common resistance type wind turbine forms include S type, barrier flat plate type, flat plate swing type, vertical shaft windmill type and wind cup type.

[0004] The convex surface of each blade of the existing resistance type wind turbine still has great resistance to the rotation of the blade, which affects the blade speed and causes the low wind energy conversion efficiency of the resistance type wind turbine, resulting in the low output power of the generator set. UTILITY MODEL CONTENTS

[0005] The utility model discloses a vertical axis wind turbine and wind power generation device containing the vertical axis wind turbine, which can improve the blade speed and wind energy conversion efficiency.

[0006] The utility model discloses a vertical axis wind turbine and wind power generation device containing the vertical axis wind turbine, which can improve the blade speed and wind energy conversion efficiency.

[0007] Further, the impeller support includes upper and lower frames parallel to each other, and the upper and lower frames are connected by a middle support.

[0008] Further, it includes two groups of vertical axis impellers placed on both sides of the middle support, and the two vertical axis center lines of the two groups of vertical axis impellers are parallel to the chord line of the arc cross section of the flow arc plate.

[0009] Further, the front flow barrier is fixed between the middle support and the flow-around arc plate, and the rear flow barrier is fixed on the side of the middle support away from the flow-around arc plate.

[0010] Further, the vertical tail is fixed on the top of the impeller support, and the vertical tail is arranged perpendicularly relative to the chord line of the arc cross section of the flow-around arc plate.

[0011] Further, the flow cross section width of the flow-around arc plate relative to the incoming flow is W0, the arc blade width is Z, the minimum radius of the arc blade motion track is r, 2r is the flow cross section width of the flow-around arc plate, the vertical shaft impeller flow cross section width is W1, W1=2r+Z; the incoming flow cross section width W=W0+2*(2r+Z), the relationship between the arc blade width Z and the flow cross section width W0 of the flow-around arc plate relative to the incoming flow is (1 / 10)*W0≤Z≤(1 / 2)*W0; the ratio range value of the flow cross section width 2r and the vertical shaft impeller flow cross section width W1 is (5 1 / 2 -1) / 2≥2r / W1≥1 / 3.

[0012] Further, the radius of the vertical shaft impeller is R, R=r+Z; the shortest distance between the outer edge of the arc blade and the outer edge of the adjacent flow-around arc plate is decomposed into a transverse distance and a longitudinal distance, and both the transverse distance and the longitudinal distance are less than 5% of the diameter of the vertical shaft impeller.

[0013] Further, the central angle corresponding to the outer arc line of the cross section of the flow-around arc plate is A, and 60°≤A≤180°.

[0014] The wind power generation device comprises a vertical shaft wind turbine, a generator, an energy storage battery and an electric slip ring.

[0015] The vertical shaft impeller has the advantages that: in the rotating process of the vertical shaft impeller, the convex surface of one blade of the vertical shaft impeller is shielded by the flow-around arc plate, so that the wind resistance of the vertical shaft impeller as a whole is reduced, and the speed of the vertical shaft impeller rotating along the wind direction is improved; meanwhile, the wind speed after flowing around the flow-around arc plate acts on the concave surface of the arc blade on the two sides of the flow-around arc plate, so that the rotating speed of the vertical shaft impeller is further improved; thus, the resistance is reduced and the power is increased in the rotating direction of the vertical shaft impeller, so that the power obtained by the vertical shaft impeller in the utility model is greater than the power of the resistance difference type wind wheel of the conventional vertical shaft wind turbine, and the wind energy conversion efficiency and the output power are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the embodiment 1.

[0017] Figure 2 is a sectional view along A-A of Fig. 1. Figure 1

[0018] Figure 3 is a perspective view of the embodiment 1.

[0019] Figure 4 is a perspective view of the embodiment 2. Figure 1 .

[0020] Figure 5 is a perspective view of the embodiment 2. Figure 2 .

[0021] Figure 6 is a schematic view of the connection structure of the generator, the conductor brush, the slip ring line and the energy storage battery described in the embodiment 2.

[0022] The labels of the components in the drawings are as follows: impeller support 1, upper support 1.1, lower support 1.2, middle support 1.3, column shaft 2, flow-around arc plate 3, outer arc line 3.1, vertical shaft impeller 4, vertical shaft 4.1, blade support 4.2, arc blade 4.3, front flow barrier 5, rear flow barrier 6, vertical tail 7, generator 8, slip ring line 9, conductor brush 10, energy storage battery 11, connecting support 12, gear set 13, output wire support 14, output wire 15, rectifier diode 16, filter capacitor 17, battery wire 18, charge and discharge controller 19, output wire 20. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] As Figures 1 to 3 ​As shown, the embodiment provides a vertical axis wind turbine, which comprises a column shaft 2, a vertical axis impeller 4, an impeller support 1, a flow around arc plate 3; the impeller support 1 comprises upper and lower racks 1.1 and 1.2 which are parallel to each other, and the upper and lower racks 1.1 and 1.2 are fixedly connected through a middle support 1.3, the middle support 1.3 plays a supporting role and ensures the synchronous rotation of the upper and lower racks 1.1 and 1.2, the shape of the middle support 1.3 can be plate-shaped, column-shaped or cylindrical, and the middle support 1.3 can be parallel to the column shaft 2; in the embodiment, the middle support 1.3 is cylindrical, the column shaft 2 is coaxially arranged in the middle support 1.3 and rotates, and the column shaft 2 is connected in the middle support 1.3 through bearings at both ends; in use, the column shaft 2 is perpendicular to the ground, and the bottom end of the column shaft 2 is fixed on a base which supports the column shaft 2, and the base comprises a tower, a tower column, a tower barrel, a structure, a building and the like.

[0026] The flow around arc plate 3 is fixed on the front of the impeller support 1, and the concave surface of the flow around arc plate 3 faces the column shaft 2; the vertical tail 7 is fixed on the top of the impeller support 1, and the vertical tail 7 is arranged perpendicularly relative to the chord of the arc cross section of the flow around arc plate 3, and the vertical tail 7 is used for automatic wind alignment; in the wind field, the vertical tail 7 drives the impeller support 1 and the flow around arc plate 3 to rotate around the column shaft 2, so that the convex surface of the flow around arc plate 3 is aligned with the wind direction, which is also called wind direction alignment or windward; the wind blows through the flow around arc plate 3 and is divided into two sides.

[0027] The impeller support 1 is provided with two groups of vertical axis impellers 4 which are arranged on both sides of the middle support 1.3, and the center lines of the two vertical axis impellers 4 are parallel to the chord of the arc cross section of the flow around arc plate 3; each group of vertical axis impellers 4 comprises a vertical shaft 4.1, a blade support 4.2 and an arc-shaped blade 4.3; the vertical shaft 4.1 is rotatably arranged on the impeller support 1, and the vertical shaft 4.1 is connected to the corresponding upper and lower racks 1.1 and 1.2 through bearings at both ends, and the vertical shaft 4.1 is arranged parallel to the column shaft 2; three groups of blade supports 4.2 are fixed on the vertical shaft 4.1 in the circumferential direction, and the arc-shaped blade 4.3 is fixed on each group of blade supports 4.2; the shapes of the arc-shaped blades 4.3 are the same, and each arc-shaped blade 4.3 is a semicircular arc structure; when the vertical axis impeller 4 is windward, the arc-shaped blade 4.3 is stressed, and drives the blade support 4.2 and the vertical shaft 4.1 to synchronously rotate around the axis of the vertical shaft 4.1, and the radii of rotation of the arc-shaped blades 4.3 are equal, and the trajectory of rotation is a cylindrical surface; the rotating directions of the two groups of vertical axis impellers 4 are opposite, and the maximum cylindrical surface trajectory formed in the rotating process of each group of vertical axis impellers 4 is adjacent to the corresponding side edge of the flow around arc plate 3; specifically, when the arc-shaped blade 4.3 approaches the flow around arc plate 3 and the outer edge of the arc-shaped blade 4.3 is arranged in the plane where the corresponding vertical shaft 4.1 and the outer edge of the arc-shaped blade 4.3 are located, the distance between the outer edge of the arc-shaped blade 4.3 and the outer edge of the flow around arc plate 3 is the shortest, and the shortest distance is decomposed into a horizontal distance and a vertical distance, and both the horizontal distance and the vertical distance are less than 5% of the diameter of the vertical axis impeller 4.

[0028] The incoming flow includes the flow around the arc plate and the flow around the vertical impeller. The width of the flow around the vertical impeller is W1, the width of the flow around the arc plate is W0 (i.e. the chord length of the arc cross section of the arc plate), the width of the arc blade 4.3 is Z, the minimum radius of the movement track of the arc blade 4.3 is r, 2r is the width of the flow cross section of the flow around the arc plate, and the flow cross section of the flow around the arc plate is referred to as the flow cross section of the flow around. The width of the flow cross section of the vertical impeller is W1, W1=2r+Z; the width of the flow cross section of the incoming flow is W=W0+2×(2r+Z); that is, when one of the arc blades 4.3 of each vertical impeller 4 is rotated to the plane where the center lines of the two vertical impellers 4.1 are located, the arc blade 4.3 is just blocked at the back of the flow around the arc plate 3; the relationship between the width Z of the arc blade 4.3 and the width W0 of the flow cross section of the flow around the arc plate is (1 / 10)×W0≤Z≤(1 / 2)×W0; the ratio range value of the width 2r of the flow cross section of the flow around the arc plate and the width W1 of the flow cross section of the vertical impeller 4 is (5 1 / 2 -1) / 2≥2r / W1≥1 / 3.

[0029] For the traditional vertical axis wind turbine, when the concave surface of the arc blade 4.3 of the vertical impeller 4 faces the wind, it is pushed by the incoming flow to rotate in the wind direction, and the convex surface of the arc blade 4.3 is blocked by the resistance in the opposite direction, which hinders the rotation of the vertical impeller 4 in the wind direction; the wind direction refers to the incoming flow direction, and the opposite direction refers to the opposite direction of the incoming flow. The difference in resistance coefficient between the wind direction and the opposite direction is the rotation power of the vertical impeller 4.

[0030] The utility model discloses a flow around arc plate 3 can effectively solve the problem of wind resistance, specific, the tail 7 is opposite to the wind, the convex surface of flow around arc plate 3 is opposite to the wind, when the arc blade 4.3 of vertical shaft impeller 4 is shielded by flow around arc plate 3, the convex surface of arc blade 4.3 is shielded, reduce the wind resistance of vertical shaft impeller 4 whole, be favorable to vertical shaft impeller 4 wind rotation, and the flow of coming flow is divided into two sides and flow around by flow around arc plate 3, because the flow around leads to the width reduction of the flow section of coming flow and wind speed increases, that is, flow around arc plate 3 shields the adverse wind direction flow of vertical shaft impeller 4 and simultaneously guides the adverse wind direction flow to the wind direction flow, removes adverse wind direction flow and simultaneously increases the wind direction flow, and the comprehensive increase of rotation power is obtained, after the flow around makes the coming flow concentrate into the flow field of vertical shaft impeller, the concave surface of another arc blade 4.3 is acted on, like this, the stress pattern of traditional resistance difference type impeller is completely changed, and the resistance flow of adverse coming flow is removed simultaneously and the resistance flow of wind direction is increased, and the change of this resistance flow is actually the direction change of adverse wind direction flow, but for vertical shaft impeller 4, it is the reduction of wind resistance and the increase of power, greatly improve the wind speed of vertical shaft impeller 4, thus, the utility model discloses remove the resistance of adverse wind direction simultaneously and increase the resistance of wind direction, and the wind resistance of vertical shaft impeller 4 rotation upward is reduced simultaneously and the power is increased, so the rotation power obtained in the utility model discloses vertical shaft impeller 4 is greater than the rotation power of resistance difference type wind wheel of traditional vertical shaft wind turbine.

[0031] In addition, the part of airflow that passes through the blade support 4.2 in the flow field of the vertical shaft impeller after the flow around is called the empty flow, and the empty flow has a certain traction effect on the arc blade 4.3 rotating with the wind, thereby further increasing the wind speed of the vertical shaft impeller 4 and being beneficial to improving the efficiency of converting wind energy into mechanical energy and the power generation efficiency.

[0032] The front flow separator 5 is fixed between the middle support 1.3 and the flow around arc plate 3, the front flow separator 5 is arranged perpendicularly relative to the tangent of the midpoint of the outer arc line 3.1 of the cross section of the flow around arc plate 3, the rear flow separator 6 is fixed to the side of the middle support 1.3 away from the flow around arc plate 3, and the front flow separator 5 and the rear flow separator 6 are arranged on the same plane on the same side; the central angle of the cross section outer arc line 3.1 of the flow around arc plate 3 is A, 60°≤A≤180°, the diameter of the outer arc line 3.1 is D, and sin(A / 2)=W0 / 2÷(D / 2)=W0 / D; the two groups of vertical shaft impellers 4 are separated by the front flow separator 5, the middle support 1.3 and the rear flow separator 6, thereby reducing the mutual influence caused by the pressure difference fluctuation between the air vortexes in the two groups of vertical shaft impellers 4 behind the flow around arc plate 3; the front flow separator 5, the rear flow separator 6 and the flow around arc plate 3 have the same height, and the height of the front flow separator 5 and the rear flow separator 6 is higher than the height of the arc blade 4.3 of the vertical shaft impeller 4, so as to ensure that the height of the windward surface of the arc blade 4.3 is covered by the flow height of the vertical shaft 4.1.

[0033] When the diameter D of the outer arc is 190 mm, the angle A is 60°, the flow arc plate h is 225 mm, the minimum radius r of the arc blade's trajectory is 15 mm, the width Z of the arc blade is 30 mm, and the height H of the arc blade is 205 mm; then W0 = sin(A / 2) × D = 95 mm, satisfying (1 / 10) × W0 ≤ Z ≤ (1 / 2) × W0. Additionally, the radius R of the vertical impeller is R = r + Z = 45 mm, the width of the vertical impeller's flow section W1 = 2r + Z = 60 mm, and 2r / W1 = 0.5, satisfying (5 1 / 2 -1) / 2≥2r / W1≥1 / 3.

[0034] Example 2: Figures 4 to 6 As shown, this embodiment provides a wind power generation device, which includes the vertical axis wind turbine of Embodiment 1, and also includes a generator 8, an energy storage battery 11, a slip ring wire 9, and a conductor brush 10. In this embodiment, the generator 8 is an existing disc-type coreless three-phase AC generator. Two generators corresponding to the two sets of vertical axis impellers 4 are fixed at the bottom of the lower frame 1.2 of the impeller support 1 through a connecting frame 12. The bottom of the vertical axis 4.1 of each set of vertical axis impellers 4 is connected to the rotor shaft of the generator 8 through a gear set 13.

[0035] The electric slip ring includes a conductor brush 10 and a slip ring wire 9 wound and fixed on the outer wall of the column shaft 2. The output wires 20 of the two generators 8 are connected in parallel and then hung on the lower frame 1.2 via the output wire bracket 14. The parallel output wires 20 are connected to the parallel conductor brush 10 and the energy storage battery 11. The output wires 20 are connected to the conductor brush 10, the conductor brush 10 contacts the corresponding slip ring wire 9, the slip ring wire 9 is connected to the output wire 15, the output wire 15 is inserted into the hollow column shaft 2 and led downwards for connection to electrical equipment.

[0036] The output wire 20 of the generator 8 leading to the energy storage battery 11 is first connected to a rectifier filter, which includes 6 rectifier diodes 16 and 1 filter capacitor 17. Two battery wires 18 are connected from the rectifier filter. The positive and negative terminals of the two battery wires 18 are respectively connected to the positive and negative terminals of the input terminals of the charge and discharge controller 19. The current is adjusted by the charge and discharge controller 19 to charge the energy storage battery 11 or to be directly output. The charge and discharge controller 19 is a conventional charge and discharge integrated module.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vertical axis wind turbine characterised in that, It includes a column shaft, a vertical axis impeller, an impeller support, a flow around arc plate; The column shaft is arranged on the impeller support in rotation, the flow around arc plate is fixed on the front surface of the impeller support, the concave surface of the flow around arc plate faces the column shaft, and the vertical axis impeller is arranged on the impeller support and located on the side of the column shaft. The vertical axis impeller includes a vertical axis, a blade support and an arc-shaped blade, the vertical axis is arranged on the impeller support in rotation, and the vertical axis is arranged in parallel with the column shaft, a plurality of groups of the blade supports are fixed on the vertical axis in a circumferential direction, and the arc-shaped blade is fixed on each group of the blade supports.

2. The vertical axis wind turbine of claim 1, wherein, The impeller support includes upper and lower supports which are parallel to each other, and the upper and lower supports are connected through a middle support.

3. A vertical axis wind turbine according to claim 2, characterised in that, The two groups of the vertical axis impellers are arranged on the two sides of the middle support, and the plane where the central lines of the two vertical axes of the two groups of the vertical axis impellers are located is parallel to the chord line of the arc-shaped cross section of the flow around arc plate.

4. A vertical axis wind turbine according to claim 3, characterised in that, The front flow separation plate is fixed between the middle support and the flow around arc plate, and the rear flow separation plate is fixed on the side of the middle support which faces away from the flow around arc plate.

5. The vertical axis wind turbine of claim 1, wherein, The vertical tail is fixed on the top or the bottom of the impeller support, and the vertical tail is arranged perpendicularly to the chord line of the arc-shaped cross section of the flow around arc plate.

6. The vertical axis wind turbine of claim 1, wherein, The flow cross section width of the flow around arc plate to the incoming flow is W0, the arc-shaped blade width is Z, the minimum radius of the motion track of the arc-shaped blade is r, 2r is the flow cross section width of the flow, the flow cross section width of the vertical axis impeller is W1, and W1=2r+Z; The flow cross section width W of the incoming flow is W0+2*(2r+Z), the relationship between the arc-shaped blade width Z and the flow cross section width W0 of the flow around arc plate to the incoming flow is (1 / 10)*W0≤Z≤(1 / 2)*W0; The ratio range value of the cross-section width 2r of the flow passing through the hollow flow and the cross-section width W1 of the flow passing through the vertical-axle impeller is (5 1 / 2 -1) / 2 ≥ 2r / W1 ≥ 1 / 3.

7. A vertical axis wind turbine according to claim 6, characterised in that, The radius of the vertical axis impeller is R, R=r+Z, the shortest distance between the outer edge of the arc-shaped blade and the outer edge of the adjacent flow around arc plate is decomposed into a transverse distance and a longitudinal distance, and the transverse distance and the longitudinal distance are both less than 5% of the diameter of the vertical axis impeller.

8. The vertical axis wind turbine of claim 1, wherein, The central angle corresponding to the outer arc line of the cross section of the flow around arc plate is A, and 60°≤A≤180°.

9. Wind power plant, characterized in that The vertical axis wind turbine includes the vertical axis wind turbine according to any one of claims 1 to 8, a generator, an energy storage battery and an electric slip ring. The vertical axis of the vertical axis impeller is in transmission connection with the rotor shaft of the generator, the output lead of the generator is electrically connected with an output line through the electric slip ring, and the energy storage battery is further connected to the output lead of the generator.

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