RU2777428C2 - Method for conversion of airflow energy into progressive wing movement - Google Patents

Abstract

FIELD: renewable energy.

SUBSTANCE: conversion of kinetic energy of an airflow into mechanical, and, then, into electrical energy occurs, when an aerodynamic wing, which moves under the action of occurring lifting force, is placed in the airflow. In extreme movement positions, in zones of changing an aerodynamic wing shape, end reverse switches are placed, which periodically transmit signals for actuation of stepper motors acting on aerodynamic sheathing of the wing and changing its configuration to a symmetrical one. The aerodynamic wing moves periodically upward and downward along guiding rails with grooves in parallel to a horizontal surface, wherein a position of the front edge od the aerodynamic wing is always provided perpendicular to an airflow vector regardless its direction. The multidirectional lifting force of the aerodynamic wing, periodically occurring under the action of the airflow, through a power bracket and a ball joint, is transmitted to a crank mechanism, a shaft of which, through couplings and an accelerating gearbox, is connected to a generator, wherein the support ball joint of a wind turbine is located on a vertical passing through the geometric center of its support (usually, rail one) ring – one of structural elements of wing orientation.

EFFECT: possibility of increasing power along the ground surface, reducing an overturning moment, which usually simplifies and cheapens a structure, increases operation reliability.

1 cl, 7 dwg

Description

The invention relates to the field of non-traditional energy and can be used to produce electrical and mechanical energy. Known "Method for converting the kinetic energy of the flow into the rotational movement of the wing and a device for implementing this method" according to the patent of the Russian Federation No.

In the well-known method of converting the kinetic energy of the flow, in particular VP, into the rotational movement of the wing, in the flow, the main shaft is installed perpendicular to the direction of flow and a wing is placed at some distance from the main shaft, its own axis is parallel to the main shaft. Around the main shaft, this wing, under the influence of the flow, performs rotational motion in a circular orbit and oscillatory motion around its own axis. When the wing moves in a circular orbit, its angle of attack relative to the resulting flow vector is set by the flap, the control unit of which rotates the flap through its shaft and bar, providing the optimal value of the angle of attack of the wing when it moves in a circular orbit, with the exception of the wing shape change zones determined by the axis position unit wing. In the zones of changing the shape of the wing, its axis with the bearing is shifted towards the electric limit switch of the reverse and is pressed against the corresponding pusher, the contact of the electric limit switch of the reverse is closed, transmitting a signal to operate the electromechanical trigger, which, at the command of the limit switch of the reverse, alternately pushes the upper or lower mushroom-shaped rod, changing in the zones the configuration of the wing symmetrically with respect to the base sheet, while changing its position of the front and rear aerodynamic skins of the wing on the axis of rotation of the aerodynamic skins.

The "conversion method" proposed in the prototype has a number of disadvantages that limit its scope:

1. A rather complicated design of a wind power plant. To obtain an acceptable cost, it is necessary to increase the capacity of this wind power plant to 10-15 megawatts.

2. Complicated control system. Particularly problematic is the design of the wing axis position assembly of FIG. 5 patents. Problems are expected in the commissioning and operation of such a wind power plant.

3. The presence of rotating elements creates noise and interference for electronics near the wind turbine, and also reduces reliability, especially during stormy airspace. Therefore, it cannot be installed near residential complexes.

4. With significant power, its vertical shaft experiences a large overturning moment. This complicates and increases the cost of the real design that implements this method.

The technical result of the proposed Method is the efficient conversion of the kinetic energy of the air flow (VP) into mechanical and then into electrical energy. At the same time, its increased characteristics in terms of ecology are taken into account. When describing the Method, a design variant of the wind turbine is used that implements the proposed Method.

To convert the energy of the airfoil into the translational motion of the aerodynamic wing, it is placed in the airfoil. The translational motion of the aerodynamic wing is carried out due to the lifting force arising from the action of the air flow on it. In the extreme positions of its movement, in the zones of changing the shape of the aerodynamic wing, reverse limit switches are placed, which act on the aerodynamic skin of the wing and change its configuration to a symmetrical one. Changing the configuration of the wing is carried out by the structural elements of the wind turbine based on a stepper motor, while the aerodynamic wing moves periodically up or down on carts along guide posts with grooves parallel to the horizontal plane. The position of the leading edge of the aerodynamic wing is always ensured perpendicular to the airfoil vector, regardless of its direction at the moment, by the structural elements of the wind turbine, for example, vane planes, rail ring. The multidirectional lifting force of the aerodynamic wing, arising under the action of the airfoil, is transmitted through the power bracket and the supporting ball joint to the crank mechanism. The shaft of its flywheel is connected to the generator through couplings and an accelerating gearbox. To simplify the design, it is important that the supporting spherical joint of the wind turbine is located on the vertical passing through the geometric center of its rail ring.

A variant of the wind turbine design that implements the proposed "Method ..." is shown in Fig. 1-7. The following designations have been introduced for them:

FIG. one.

4 - middle parts of the wing inversion system (details in Fig. 2), 5 - extreme details of the wing inversion system (details in Fig. 2), 11 - rear aerodynamic skin of the wing (details in Fig. 3) of the wing inversion system, 12 - base wing contour, 13 - front aerodynamic skin of the wing (for more details in Fig. 3) of the wing inversion system, 14 - bogie (see Fig. 4) in the grooves of the vertical struts - 26 (see Fig. 5), 15 - power bracket, 16 - ball joint, 17 - connecting rod, 18 - flywheel pin, 19 - flywheel, 20 - flywheel shaft support, 21 - shafts, 22 - accelerating gearbox, 23 - electric generator, 24 - generator output voltage, 25 - base plate on the ground, 26 - vertical rack with T-slots - detail of the contour of the base prism (see Fig. 5), 27 - rollers of the wing orientation system, 28 - support (usually rail) ring of the wing orientation system, 29 - contour of the base prism of the wind turbine.

Fig 2.

2 - axes of parts of the wing inversion system, fixed in the basic contour of the wing - 12, 3 - sprocket on axes - 2, 4-1----4-N - middle parts of the wing inversion system, 5 - extreme parts of the wing inversion system.

Fig. 3.

11 - rear part of the wing aerodynamic skin, 13 - front part of the wing aerodynamic skin, 31 - axes of parts 11, 13 of the wing inversion system, fixed in the basic contour of the wing - 12.

Fig. four

14 - carts - rigidly fixed at the corners of the base contour of the wing - 12.

Fig. 5

26 - a fragment of a vertical rack from the contour of the base prism - 29 with T-slots - 33 for bogies - 14, 32 - reverse limit switches in the areas of wing configuration change (wing inversion systems),

Fig. 6

4-1----4-N - middle parts of the wing inversion system, 5 - extreme parts of the wing inversion system, 6 - sprockets of the wing inversion system, 7 - chain of the wing inversion system, 8 - stepper motor of the wing inversion system, 9 - sprocket on the stepper motor shaft, 10 - wing surface in the zone 4-1----4-N - middle parts of the wing inversion system, 11 - rear aerodynamic skin of the wing, 12 - basic contour of the wing, 13 - forward aerodynamic skin of the wing, 14 - trolley (see Fig. 4) in the grooves of the vertical posts - 26 (see Fig. 5),

Fig. 7.

26 - vertical rack with T-slots - detail of the contour of the base prism (see Fig. 5), 27 - rollers of the wing orientation system, 28 - support (for example, rail) ring of the wing orientation system, 29 - contour of the base prism of the wind turbine. 30 - vane planes of the aerodynamic wing orientation system.

The operation of a wind turbine that implements the proposed "Method ...".

For the operation of this wind turbine, several control systems have been developed:

1. Wing inversion system.

The movement of the aerodynamic wing parallel to the horizontal plane, regardless of the direction up and down relative to the ground, is carried out under the influence of the lifting force that occurs when the air flow flows around it. The extreme positions during the movement of the wing up and down fall into the zones of change in the shape of the aerodynamic wing. Reverse limit switches - 32 are placed in these zones, which act on the aerodynamic skin of the wing and change its configuration to symmetrical. Specifically - (see Fig. 6) at the command of the reverse limit switches - 32 stepper motor rotates 180 degrees alternately clockwise and counterclockwise. Through a chain drive - and sprockets - a 180 degree turn is made of the middle parts of the wing inversion system - 4-1----4-N, the extreme parts of the wing inversion system - 5, and - 4-1----4-N form the surface of the aerodynamic wing in zone - 10, and - 5 completes the configuration of the wing, substituting the rear aerodynamic wing skin - 11 and the front aerodynamic skin of the snout - 13 to the zone - 10.

2. Wing leading edge orientation system.

A significant part of the design of the wind turbine is the wing orientation system. These are vane planes - 30 (see Fig. 7), fixed on the side walls of the contour of the base prism - 29 of the wind turbine, which, when the leading edge of the wing deviates from a perpendicular position relative to the air flow vector, create a force to eliminate this deviation. The rotation of the wind turbine is carried out on the support (usually rail) ring - 28 with the help of rollers - 27, fixed at the corners of the base prism - 29 in its lower plane.

3. The system of movement of the aerodynamic wing up and down under the influence of lifting force.

The movement of the wing up and down is carried out on carts - 14 (see Fig. 4), which are rigidly fixed at the corners of the basic contour of the wing - 12. Carts - 14 move in T-slots - 33 vertical racks - 26 (see Fig. 5 ), fragments of the contour of the base prism - 29 wind turbines. Reverse limit switches - 32 give commands to change the direction of movement of the wing up or down. The use of carts - 14 instead of conventional rollers protects the moving wing from jamming in the grooves - 33.

4. The electromechanical system of the wind turbine (see Fig. 1).

Power bracket - 15 is rigidly attached to the base contour - 12 of the aerodynamic wing. In the middle of it, a ball joint - 16 is fixed, to which the connecting rod of the crank mechanism is rigidly fixed. Next, the finger - 18 of the flywheel - 19, the support post of the flywheel shaft - 20, the shafts - 21, the accelerating gearbox - 22 and the electric generator - 23. When the wing moves up and down, the bracket 15 repeats its movement. Through the ball joint, this movement is transmitted to the connecting rod - 17, the pin - 18 and provides the rotational movement of the flywheel - 19, the rotating shaft of which through the couplings - 21, which increases the speed of the gearbox - 22, rotates the shaft of the electric generator - 23, which generates electricity - 24. At the same time, the support leg - 20 of the flywheel shaft - 19, the accelerating gearbox - 22 and the generator - 23 are on the base plate - 25, lying on the ground.

An important feature of the method and its device is the ability to increase power along the earth's surface, reducing the overturning moment of the device, which usually simplifies and reduces the cost of design, increases reliability in operation. In addition, the absence of rotating parts of the device improves its environmental performance and expands the scope.

Claims (1)

The method of converting the energy of the air flow into the translational motion of the aerodynamic wing due to the lifting force is that it is placed in the air flow, and in the extreme positions of the movement, in the zones of changing the shape of the aerodynamic wing, the reverse limit switches are placed, which act on the aerodynamic skin of the wing and change its configuration to symmetrical, characterized in that the wing configuration is changed by structural elements of the wind turbine, while the aerodynamic wing moves periodically up or down along the guide posts parallel to the horizontal plane and always ensures the position of the leading edge of the aerodynamic wing by structural elements of the wing orientation perpendicular to the air flow vector independently from its direction, and the multidirectional lifting force of the aerodynamic wing, arising under the action of the air flow, is transmitted through the power bracket and the ball joint to the cranks th mechanism, the shaft of which is connected to the generator through couplings and an accelerating gearbox, and the supporting ball joint of the wind turbine is placed on a vertical passing through the geometric center of its supporting ring - one of the structural elements of the wing orientation.

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