Wind turbine arrangement

Abstract

The invention belongs to the technical field of wind power generation, and relates to a wind turbine device capable of being used as an independent energy source. The device comprises a rotor arranged in a shell, and the rotor is arranged on a wind collector and is communicated with the wind collector. And the rotor shell comprises an outlet pipe. The rotor blades are fixed to the centrifugal impeller from the inner surface of the shell and distributed in the chordwise direction of the rotor shell. The wind collector blades are provided with reinforcing ribs and are vertically oriented, and the wind collector blades bending towards airflow are mutually staggered and sequentially overlapped to form a vertical air duct. A baffle composed of a plurality of independent blades is fixed to the inner side of the vertical air channel, and the blades can rotate around the axis inclining towards the rotating direction of the rotor relative to the vertical direction. Starting blades are installed on the inner sides of the lower-layer blades of the upper-layer orthogonal rotor impeller and can rotate around the axis inclining towards the rotating direction of the rotor relative to the vertical direction. The technical effect of the invention is that the energy efficiency and performance of the device operating at any duration and wind speed are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of wind engines and is a wind turbine device which can be used as an independent energy source. Background Art

[0002] A wind turbine device with twin coaxial impellers is known, wherein one axial (propeller-type) impeller is located above the exhaust pipe, and another multi-blade impeller with a vertical rotation axis is installed inside the wind guide device (Russian invention patent RU2286477, issued in 2006).

[0003] The disadvantages of this structure are mainly reflected in: the speed is limited by the wind speed and the axial impeller has low efficiency. This is because the wind flow vector in the duct is perpendicular to the rotation plane of the axial impeller blades. In contrast, the motion vector of the wind in the centrifugal impeller is consistent with the impeller rotation plane. In addition, the area moment of inertia (i.e., distribution characteristics) of the axial impeller blades relative to the rotation axis is significantly smaller than that of the centrifugal impeller blades of equivalent diameter, resulting in a significant reduction in efficiency.

[0004] Known orthogonal impellers with vertical rotation axes, such as Darrieus rotors, require external force to start rotation, such as by using Savonius blades fixed to the rotation axis of the orthogonal impeller. However, when the radial end of the orthogonal impeller reaches a linear speed exceeding the wind speed, the Savonius blades fixed to the rotation axis of the orthogonal impeller become "brakes", increasing the resistance to rotor rotation ("wind resistance"), thereby reducing efficiency.

[0005] A wind turbine device is known that comprises a centrifugal impeller rotor with a vertical rotation axis, whose working blades are bent backwards. The rotor is mounted on a wind collector consisting of fixed blades, which are overlapped and connected to each other by inclined wind guide reinforcement ribs to form a vertical air duct. The air duct is connected to the centrifugal impeller housing, and its outlet pipe leads to the groove of the fixed blade of the wind collector to utilize the energy of the exhaust gas flow discharged from the wind turbine device. (Russian invention patent RU 2638120 C1, issued in 2017).

[0006] However, due to the presence of a low-pressure area on the leeward side of the wind turbine device and almost no pressure at the top of the vertical wind duct, the wind speed pressure entering the wind turbine device may partially drop, which requires increasing the height of the inclined wind guide reinforcement ribs, thereby increasing the metal usage of the device and reducing the efficiency of the device. The connection method between the outlet pipe and the groove of the wind collector blade will also affect the efficiency. Summary of the invention

[0007] The technical problem that the present invention aims to solve is that the conventional wind turbine devices have insufficient efficiency and poor environmental performance.

[0008] The technical effect of the proposed solution is to increase the efficiency of the installation under conditions of any duration, wind speed and wind direction.

[0009] The technical achievements are achieved through the following methods:

[0010] A wind turbine device, characterized in that it comprises a rotor mounted in a housing, the rotor being mounted on and connected to a wind collector, the rotor housing comprising an outlet pipe, the rotor blades being fixed to a centrifugal impeller from the inner surface of the housing and being distributed along the chord direction of the rotor housing. The blades of the wind collector have reinforcing ribs, and the blades thereof, which are vertically oriented and bent in the direction of the wind flow, are staggered to form a vertical air duct. The difference is that a baffle consisting of independent blades is fixed on the inner side of the vertical air duct, and the blades can rotate around an axis inclined relative to the vertical direction in the direction of rotation of the rotor. The starting blades of the lower blades of the upper orthogonal rotor impeller are mounted on the inner side of these blades and can rotate around an axis inclined relative to the vertical direction in the direction of rotation of the rotor.

[0011] Compared with the Savonius blades fixed directly to the rotating shaft, the lower blades of the upper orthogonal impeller have start-up blades, which are located at the impeller radius and away from the rotating shaft, thereby ensuring easy startup of the rotor. By reusing the energy of the airflow flowing out of the wind turbine device, a low-pressure area is formed at the top of the vertical air duct in front of the lower centrifugal impeller, thereby reducing the airflow resistance in the vertical air duct. The start-up blades are combined with the inner side of the lower blades under the action of centrifugal force to form an integral structure, thereby eliminating the "wind brake" effect generated when the linear speed of the radial end of the upper impeller exceeds the wind speed.

[0012] The blades of the baffle are designed to rotate around an axis that is tilted in the direction of rotation of the rotor relative to the vertical direction, thereby guiding the wind into the vertical air duct of the wind collector. Through the effect of the spiral airflow, the airflow on the downwind side of the vertical air duct is effectively controlled to reduce air leakage. At the same time, the low-pressure area formed on the outer side of the downwind side of the wind collector is used to further optimize the airflow efficiency.

[0013] To ensure the environmental friendliness of the wind turbine installation and reduce noise and visual disturbance, a fixed deflector frame is designed around the upper impeller, on which the wind screen is installed. For the lower blades of the upper orthogonal impeller, the wind screen is located on its inlet side to guide the airflow into the rotor. For the upper blades of the orthogonal impeller, the wind screen is designed in the opposite direction of the rotor rotation to reduce airflow disturbance and optimize efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A wind turbine device rotor assembly is shown;

[0015] Figure 2 showing a vertical cross-section of a wind turbine arrangement;

[0016] Figure 3 A horizontal section showing the lower centrifugal impeller;

[0017] Figure 4 The starting blades of the lower blades of the upper impeller are shown;

[0018] Figure 5 The fixed guide vane frame surrounding the upper impeller is shown;

[0019] Figure 6 A top view AA of an orthogonal impeller upper blade with a wind guide screen is shown;

[0020] Figure 7 BB top view showing the lower blade of the orthogonal impeller centrifugation with wind guide screen;

[0021] Figure 8 Shown is an upper impeller wind deflector screen for upper and lower blades on a fixed deflector frame support;

[0022] Fig. 9 An air collector is shown with vertical air ducts, stiffening ribs and external elements of fixed blades;

[0023] Fig.10 A horizontal cross section showing an air collector with vertical air ducts, fixed blades, reinforcing ribs, and baffles for the air inlet passage;

[0024] Fig.11 A schematic diagram showing the assembly of a vertical duct wall from internal elements of fixed blades, with inclined stiffeners and opening baffles for air intake pre-installed;

[0025] Fig.12 A diagram showing the connection between the exterior of the fixed wind collector blade and its interior (vertical wind duct wall);

[0026] Fig.13 Frame showing switchboard and battery room with hatch access to vertical air ducts. DETAILED DESCRIPTION

[0027] The wind turbine device is assembled by a rotor 1 with a vertical rotation axis, a coaxial impeller, a lower centrifugal impeller 7 mounted at the lower end of the generator shaft, and an upper orthogonal impeller 2 mounted at the upper end of the generator shaft. The lower centrifugal impeller 7 with a wind flow fairing 8, blades 9, an outlet pipe 6 and an inlet flange is mounted on the flange of a vertical air duct 12, and the vertical air duct 12 is formed by the inner wall 19a of the fixed air collector blades, which are composed of inclined reinforcing ribs 20 and louvers 22 (assembled in turn into independent modules) to form an opening for air intake, so that the wind enters the vertical air duct 12 through a baffle 23. The baffle 23 is mounted on the inner wall 19a of the vertical air duct 12 and can be rotated inwardly around an axis inclined relative to the vertical direction to the rotation direction of the rotor 1 to enter the vertical air duct 12. The assembled vertical air duct 12 is equipped with an external part 19 of the fixed blades of the air collector, a support 25, a connecting piece 24 and an external reinforcing rib frame 21 ( Figure 1 , 2 , 3).

[0028] The lower blades 4 are mounted on the upper orthogonal impeller 2 and can move around the outlet pipe 6 of the casing 5 of the lower centrifugal impeller 7. A starting blade 10 is provided on the inner side of the lower blade 4 of the upper impeller 2 (the blade 4 and the starting blade 10 are connected by an acute angle fixture 11). The starting blade 10 can rotate around an axis that deviates from the vertical direction and is inclined toward the rotation direction of the rotor 1 under the action of centrifugal force, and is completely fitted with the inner side of the blade 4 ( Figure 4 ).

[0029] The upper orthogonal blades 3 of the upper impeller 2 are manufactured according to the principle of aircraft wings, and the inner side thereof can interact with the windward, which is opposite to the rotation of the rotor 1, thereby generating lift. The vector direction of the lift is consistent with the rotation direction of the rotor 1, which helps to increase the rotation speed of the rotor 1. The upper orthogonal blades 3 and the lower blades 4 are respectively fixed on the orthogonal impeller 2 ( Figure 1 ) is separated by a horizontal disk (not shown in the figure) on the upper blades 3 and the lower blades 4.

[0030] A frame in the form of a fixed deflector 14 is designed around the upper impeller 2, which includes a bearing element 18, a support 17, and wind guide baffles 15 and 16 fixed to the support 17 by screw brackets 13. The baffles 15 and 16 can adjust the wind attack angle on the blades 3 and 4: for the upper blade 3, the baffle 15 is deployed against the rotation direction of the rotor 1 to allow the wind to enter; for the lower blade 4, the baffle 16 is deployed along the rotation direction of the rotor 1 to allow the wind to enter. The leading edge of the lower blade 4 and the leading edge of the upper blade 3 are both arranged on the orthogonal impeller 2 offset relative to the rotation axis of the rotor 1 ( Figure 1 , Figure 5 , Figure 7 ).

[0031] The wind collector is equipped with fixed blades 19 and is installed on the load-bearing frame of the distribution room ( Fig. 9 ). A hatch is provided on the ceiling of the switch room for performing maintenance work in the vertical air duct 12.

[0032] The device works as follows:

[0033] The rotation of the rotor 1 begins when the wind directly acts on the lower blades 4 of the orthogonal impeller 2, and the starter blades 10 are pushed open, which causes a low pressure area to appear directly inside the lower centrifugal impeller 7, which in turn ensures that the airflow is "sucked" into the vertical air duct 12 under the wind pressure from one or two grooves of the fixed blades 19, while the blades 23 of one or two louver baffles are opened (the blades 23 of the remaining louver baffles tightly cover the remaining openings under the influence of the spiral airflow). The wind flow generated in the vertical channel transfers its energy to the blades 9 of the centrifugal impeller 7 and the rotor 1 respectively, while the wind flow discharged from the branch pipe 6 of the housing 5 re-affects the rotation of the rotor 1 of the orthogonal impeller 2 through the lower blades 4 (centrifugal action). The starter blades 10 rotate under the action of the generated centrifugal force and abut the inner side of the blades 4 without interfering with the rotation of the rotor 1. The combined effect of the rising airflow from the blades 4 and 9 of the lower centrifugal impeller 5 along the vertical air duct 12 on the rotor 1 increases the interaction speed between the windward airflow and the inner surface of the blades 3 of the orthogonal impeller 2, and the lift generated thereby is further increased. This mechanism enables the rotation speed of the rotor 1 to be significantly increased, even exceeding the rotation speed of the conventional horizontal rotating shaft impeller, thereby improving the working efficiency of the entire wind turbine device ( Figure 1-13 ).

[0034] The difference between the present invention and the known wind turbine device is that, on the added upper orthogonal double-layer impeller, the lower blades are arranged to be movable around the shell of the outlet pipe with the lower centrifugal impeller, and are equipped with starting blades with acute-angle fixers, and the blades can rotate around an axis inclined to the direction of rotation of the rotor relative to the vertical direction, so that the plane is positioned close to the inner side of the blade; a louver baffle is installed on the inner wall of the opening for wind to enter the vertical air duct, and the louver baffle can rotate and open relative to the axis perpendicular to the direction of rotation of the rotor to allow wind to enter the vertical air duct.

[0035] The proposed wind turbine design can operate stably under various wind speeds and operating conditions and has energy-saving characteristics, which can significantly reduce electricity costs and improve operating efficiency.

Claims

1. A wind turbine device, characterized in that: The device includes a rotor installed in a shell, and the rotor is installed on a wind collector and connected to the wind collector. The shell of the rotor includes an outlet pipe. The blades of the rotor are fixed to the centrifugal impeller from the inner surface of the shell and are distributed along the chord direction of the rotor shell. The blades of the wind collector are provided with reinforcing ribs and are vertically oriented, wherein the blades bent in the direction of the wind flow are staggered to form a vertical air duct. The difference is that a baffle composed of multiple independent blades is fixed on the inner side of the vertical air duct, and these independent blades can rotate around an axis inclined to the direction of rotation of the rotor relative to the vertical direction. The inner side of the lower blades of the upper orthogonal rotor impeller is equipped with a starting blade, and the starting blade can rotate around an axis inclined to the direction of rotation of the rotor relative to the vertical direction.

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