VERTICAL-AXIS WIND TURBINE

Abstract

The wind turbine includes a rotor 6 and a stator 1 mounted coaxially therewith and provided with lower 2 and upper 3 bases interconnected by vertical guide vanes 4 of the stator, oriented outward. A confuser 22 with blades 23 is mounted on the lower base 2, and a diffuser 9 is mounted above the stator 1. A lower disc 10 of the diffuser is rigidly attached to an upper part 11 of the diffuser that serves as the upper base 3 of the stator. Lower 19 and upper 16 half-axles of rotation of the rotor are installed in upper 21 and lower 17 supports, respectively. A rotor body 7 is made in the form of a hollow truncated cone tapering upward having a curvilinear surface. Rotor blades 8 have a curvilinear surface, preferably of hyperbolic shape, and are installed on an outer surface of the rotor body 7. Upper 13 and lower 14 impellers with curvilinear blades 15 and 20 are mounted inside the rotor body. A rotor fan 25 is additionally installed inside a cavity 24 of the lower disc 10 of the diffuser 9. The blades of the fan are wrapped around the upper part of the outer surface of the rotor body 7. Spacing of the blades of the upper impeller 13 is chosen to be greater than a blade spacing of the fan 25.

Claims

1. A wind turbine with a vertical axis of rotor rotation, comprising: a stator having lower and upper bases interconnected by vertical guide vanes of the stator, a rotor body made in the form of a hollow truncated cone tapering upward, rotor blades installed on an outer surface of the rotor body, upper and lower half-axles of rotation of the rotor installed in upper and lower supports respectively, an upper cross-piece, an upper impeller, and a confuser with blades installed on the lover base, wherein: the upper impeller is secured inside an upper part of the rotor body, a diffuser is installed above the stator, the diffuser being made in the form of two spaced biconvex discs, the two spaced biconvex discs including a lower disc and an upper disc, respectively, the lower disc being rigidly connected to the upper disc, while serving as the upper base of the stator, the stator vanes have a curved surface and are oriented outward, the rotor body has a curved surface, an upper part of the rotor body being secured to the upper half-axle of rotation of the rotor with the help of blades of the upper impeller, the upper support is secured to the upper base with the help of the upper cross-piece, a lower part of the rotor body comprises a lower impeller, wherein blades of the lower impeller connect the rotor body with the lower half-axle of rotation of the rotor, the lower support of the lower half-axle of rotation of the rotor being secured at a top of the confuser, and a cavity of the lower disc of the diffuser additionally comprises a rotor fan, wherein blades of the rotor fan are wrapped around an upper part of an outer surface of the rotor body, while a spacing of the blades of the upper impeller is greater than a spacing of the blades of the fan.

2. The wind turbine according to claim 1, wherein the surface of the rotor body has a hyperbolic shape.

3. The wind turbine according to claim 1, wherein a surface of the rotor blade has a hyperbolic shape.

4. The wind turbine according to claim 1, wherein the stator vane is configured to enable a change in an angle of inclination relative to the vertical axis of the stator.

Description

EMBODIMENTS OF THE INVENTION

[0014] The invention is illustrated by the drawings, in which:

[0015] FIG. 1 shows a longitudinal axial cross-section (A-A in FIG. 3);

[0016] FIG. 2 shows a frontal view;

[0017] FIG. 3 shows a top view;

[0018] FIG. 4 shows a cross-section (B-B in FIG. 2);

[0019] FIG. 5 shows a cross-section (C-C in FIG. 2).

[0020] A wind turbine with a vertical axis of rotation of the rotor comprises a stationary stator 1 provided with a lower base 2 and an upper base 3. The bases 2 and 3 are interconnected by vertical guide vanes 4 of the stator, oriented outward and configured to rotate relative to an axis 5. A rotor 6 is arranged inside the stator 1 and has a common axis of symmetry therewith. A rotor body 7 is made in the form of a hollow cone tapering upward, which has a curved surface. It is preferable that the surface of the rotor body has a hyperbolic shape.

[0021] Longitudinal blades 8 are installed on an outer surface of the rotor body 7 and are made in the form of curved ribs. The blades 8 are oriented at an angle to the axis of symmetry of the rotor. It is preferable that the surface of the rotor blades has a hyperbolic shape.

[0022] A diffuser 9 is installed above the stator 1 and is made in the form of two spaced biconvex discs, a lower disc 10 of which being rigidly connected to an upper disc 11 and serving as the upper base 2 of the stator. The connection between the diffuser discs can be achieved, for example, by using studs 12. The distance between the diffuser discs is selected to provide lower air pressure above the upper impeller of the rotor.

[0023] Upper 13 and lower 14 impellers of the rotor are secured inside the rotor body 7. Blades 15 of the upper impeller are used to secure the upper part of the rotor 6 to an upper half-axle of rotation 16 of the rotor, an upper support 17 of which is attached to the upper base 2 by means of an upper cross-piece 18. Blades 20 of the lower impeller 14 of the rotor are used to connect the rotor 6 with a lower half-axle of rotation 19. A lower support 21 of the rotor is secured at the top of a confuses 22 provided with blades 23.

[0024] A cavity 24 of the lower disc 10 of the diffuser additionally comprises a rotor fan 25, blades 26 of which are wrapped around the upper part of the outer surface of the rotor body 7.

[0025] A blade spacing of the upper impeller 13 is selected to be greater than a blade spacing of the fan 25 in order to equalize the flow velocities inside and outside the rotor body due to different angular velocities of the blades in the center of the rotor and the periphery thereof.

[0026] The transmission of the rotary motion of the rotor, for example, to an electric generator or a pump, is realized by means of the lower half-axle.

[0027] The wind turbine with a vertical axis of rotation of the rotor operates as follows.

[0028] A horizontal air flow hits the stator vanes 4. A part of the flow impacting the outer parts of the stator vanes is deflected outward by the vanes to bypass the rotor 6. Another part of the air flow impacts the inner surfaces of the stator vanes 4, becomes accelerated by them and impacts the rotor blades 8. In this case, due to the curvilinear shape of the surface of the rotor blades, an upward flow is formed along the outer surface of the rotor concurrently with the creation of a rotation torque for the entire rotor structure. This external upward flow impacts the blades of the fan 25 of the rotor, thus creating an additional rotor torque.

[0029] in the area of the stator base 2, the resulting decrease in pressure causes the air flow from below to enter the confuser 22, where the vertical air flow velocity increases, the flow is swirled due to the curvilinear shape of the confuser blades 23, and an upward flow entering the rotor body 7 is formed. The internal air flow sequentially impacts the lower impeller 14 and then the upper impeller 13, therefore increasing the rotor torque.

[0030] Thus, two upward vortex flows are realized in the proposed design, one—on the outer surface of the rotor, and another—inside thereof. One vortex picks up and additionally swirls the other. This leads to an increase in the wind turbine torque in general. A series of sequentially installed blades of the confuser, as well as upper and lower impellers contributes to the creation and stage-wise amplification of the vortex flows inside the rotor body, which makes it possible to gradually enhance the effect of increasing rotor torque.

[0031] The entire structure as a whole creates the motion of the enhanced air flow inside the wind turbine, including a wind shadow area, due to acceleration of the air flow by the confuser, internal impellers 13 and 14 of the rotor, rotor blades 8, as well as creation of the area of low air pressure by the fan 25 and diffuser 9.

[0032] The upper disc 11 of the diffuser protects the structure from atmospheric precipitation. In addition, the proposed wind turbine with a vertical axis of rotation of the rotor is characterized by a low sound emission due to the absence of planes moving in parallel with different speeds.