Method to convert energy of air or water flow currents and power plant for its realisation

FIELD: power engineering.

SUBSTANCE: method for conversion of energy of air or water flow currents is characterised by usage of a spring 8, with which a wing 1 or an airfoil is connected kinematically via a movable axis. The wing 1 or the airfoil is connected with the spring 8 with a sling 4. Directly near the wing 1 the sling 4 is equipped with auxiliary rear and front bridles 5 and 6. The bridles 5 and 6 limit the attack angle from the minimum to the maximum position by means of movement of the axis relative to the centre of forces application, creating a torque, which in its turn results in change of the attack angle and sling 4 tension.

EFFECT: simplified design, reduced material intensity, increased manufacturability and as a result lower specific cost of a generated kW*hr of electric energy.

2 cl, 7 dwg

 

The invention relates to the field of energy and can be used in wind power or hydropower plants to generate electricity or to perform mechanical work [F03B 3/12, F03B 7/00, F03B 3/02].

In the prior art it is known device that converts wind energy into electrical energy with the transfer of mechanical work on the working body, performing oscillatory motion (EN 2142572, IPC F03D 5/06, publ. 10.12.1999). The disadvantage of the Converter is that it has a complex structure. In addition, for obtaining useful work requires great pressure of the fluid. Also known energy Converter wind acting on the tethered aircraft, with the transfer of mechanical work on the working body, performing oscillatory motion (EN 2109981, F03D 5/06, publ. 27.04.1998,). Known Converter includes an aircraft that is holding the rope, working body, reciprocating movement, and a mechanism for performing useful work. Known Converter allows the use of air flow, usually blowing on high. The disadvantage of this solution lies in the structural complexity of the kinematic relations. The motion of the wind on the working body has a complex structure and can quickly fail.

Known energy is ostanovka to convert the energy currents of air or water flows, containing the PTO, which kinematically via wire transfer associated wing or aerodynamic profile maintained in the stream in the direction of its motion (WO 2008034421, publ. 27.03.2008). This decision was made as a prototype.

The disadvantage of this solution lies in the difficulty of communication wing with PTO shaft, which causes the presence of large mechanical losses due to the resistance to movement of troso-block transmission elements.

The closest solution is the patent for the energy Converter wind [EN 2380569, F03D 05/06, publ. 2010] into electrical energy, containing the aircraft with the holding rope, working body, reciprocating movement, and the mechanism that produces useful work, characterized in that the aircraft is made in the form of the body is lighter than air with the aerodynamic profile and has a lower spherical and flat upper surface, with the bottom side of the aircraft coupled with a cable with three diverging from the rope, Leonov, at the bottom of the rope passes through the fixed funnel receiver with an expanding part facing to the aircraft, below the funnel-shaped receiver cable coupled to the winch, the working body and the mechanism that produces useful work done in the form of electr the ical generator with the translational motion of the armature, articulated cable below the funnel-shaped receiver with clamp and spring compression-tension, compression spring-tension the lower end rigidly connected to a stationary surface.

Tackle disadvantage is that the parameters of the oscillations of the AIRCRAFT (the aircraft) is not adjustable. Occur (seemingly) spontaneously due to changes in wind speed. In the self-oscillations with the specified parameters are not provided.

The aerodynamic force acting on LA varies little (assuming that is changing), as LA is almost spherical. Positive work, as the difference works forward and reverse, minor that provides small efficiency.

There are no conditions for the emergence of self-oscillations, as there is no feedback.

The objective of this invention is to provide a Converter of wind energy with a relatively simple design, which is more reliable than the prototype, and is capable of converting wind energy with greater efficiency to generate electricity or perform mechanical work.

The present invention is directed to the achievement of the technical result consists in simplifying the structure, reducing the metal, improving technology and, as a consequence, a sharp reduction in the unit value generated kilowatt hour of electricity.

this technical result is achieved due to the fact, what method of energy conversion currents of air or water flows, characterized by the use of springs with which the strap through the bending axis kinematically linked introduced into the flow of the wing or airfoil, wherein the wing or airfoil is connected with the spring sling, and directly from the wing strap equipped with auxiliary rear and front straps (the frenulum), which limit the angle of attack from the minimum to the maximum position by moving the axis relative to the center of application of the forces, creating torque which in turn leads to the change of angle of attack and tension lines.

The power plant is to convert the energy currents of air or water streams containing the spring, which is kinematically connected part of the stream along its direction of movement of the wing or airfoil, wherein the wing or airfoil connected with this spring sling, which is in the immediate vicinity of the wing has an additional short lines (bridle), made with the possibility of limiting the angle of attack in a given range, also contains a control unit angle of attack, made with the possibility to change the angle of attack of the wing from the minimum to the maximum, when moving on the measures of bridle fastening axis of the main lines relative to the center of the application aerodynamic forces, and thus the occurrence of flutter.

These characteristics are essential and interrelated with the formation of a stable set of essential features, sufficient to obtain the desired technical result.

Distinctive features of the invention in comparison with the prototype are as follows.

The parameters of the oscillations of the AIRCRAFT (the aircraft) are determined by the geometrical characteristics of the wing and can vary, for example, the length of the frenulum. This reliably ensures self-oscillations with the given parameters, which is not in the prototype.

The difference between the aerodynamic forces direct (working) stroke with a large angle of attack differs sharply from the reverse with a small angle of attack. I.e. move against the wind edge, or the entire plane is a big difference. Thus, positive work, as the difference works forward and reverse stroke is significantly higher than in the prototype, which provides much greater efficiency.

The administration wing is due to the change in the position of the Central axis of the fixing straps around the center of application of the forces. The axis of the fastening straps to the wing moves in the groove by means of the bridle thrown over the rollers on the wing and attached to the same axis.

The invention is illustrated by a specific example, which, however, is not the unity is possible but, but clearly demonstrates the possibility of achieving a given set of features required technical result.

Figure 1 shows a General view of the plant to the aerodynamic profile in the form of a kite, with 1 wing (airfoil kite), 2 - device control angle of attack (UWUA) rigidly connected to the wing (a kite) in the center of aerodynamic forces, 3 - strut, 4 - line, 5 - front bridle, 6 - rear bridle, 7 - joint connection lines with a spring, 8 - spring.

Figure 2 shows the control device for angle of attack (UWUA). Unstable neutral position. Any deviation of any parameter leads to a sharp change of angle of attack in one direction or another, where a 9 - frame, 10 - slot in the frame 11 to move freely in the slot axis to which movably mounted and slings and bridles, 12 front roller, through which spanned the front bridle (5), 13 of the rear roller through which spanned the rear bridle (6).

Figure 3. Occurred external perturbation. For example, in the lower half of the wing blew a little stronger wind. Appeared torque in a counterclockwise direction. The lower bridle through a certain angle will stretch and pull to the right-down axis and attached sling.

Figure 4. At the point of attachment of the frenulum to etreme will have a fracture due to the forces of the tension bridle. And as soon as the slightest force tension bridle will occur so immediately axis going to the right. So as. on the right it acts tension bridle, and to the left "fallen" lore "does not pull". The axis will move to the right until the disappearance of torque (not necessarily extreme, and, may be, and an intermediate location in the cracks), but the wing inertia will continue rotating clockwise until the axis reaches the stopper. And may not reach the limiter, because the torque begins to act in the opposite direction. The beginning of the rotation in the opposite direction depends on many source data.

Figure 5. The stub axle stared at the edge of the slot. This is the minimum angle of attack. The counterclockwise movement stopped. The wing area behind the axle mounting was more than SSDI. It is clockwise, begins a similar process, but clockwise.

6. Wing moves clockwise at first due to the fact that the center of aerodynamic forces were behind the axle mount, and then another, and by inertia to the position of maximum angle of attack, although it appeared the counteracting moment. Lower rear bridle relaxed.

Further process will be repeated. The parameters of self-oscillations will depend on a variety of source data, in particular from geometricas the size (the length of the bridle, the size of the slots and so on). These geometrical parameters you can modify the parameters of self-oscillations (duration, period, frequency, and even the shape of the meander).

Power tension lines at the maximum angle of attack will be more than minimal. Therefore, in one half-cycle of the sling will pull stronger than the second.

7. Shown is similar to the operation of the plant in the water flow, where 14 - guide rollers 15 and the float to set the desired depth, 16 - anchor, 17 - anchored stationary barge.

The invention provides for converting the oscillatory motion of the wing in fluctuations in the tension of the sling, which may be used to perform mechanical work (for example, to operate the pump) or converted into electrical energy with a minimum of material and with maximum simplicity and reliability of the plant.

The power plant is to convert the energy currents of air or water streams (Figure 1) spring 8, which is kinematically connected discourse in the flow wing 1 or aerodynamic profile. You can use inflatable wing is lighter than air.

Wing 1 (or airfoil) is connected with the spring 8 sling 4, and a sling attached to the movable axis which can move freely about the point of application of the aerodynamic forces in p is oresi 10 (2), creating through bridle 5 and 6 (figure 2) positive feedback and thus the conditions for the emergence of self-oscillations of the whole system.

Thus, when the maximum angle of attack power tension lines is maximum and at the minimum angle of attack power tension lines will be minimal to the Point "a" in the hinge of sprinkling slings to the spring will also be self-oscillations, which can be used to produce mechanical work or further conversion into electricity.

Thus, the present invention provides the possibility of obtaining power from the energy of water or air flow when using a simple kinematic structure. The present invention is industrially applicable, as may be produced by known technologies.

1. The method of conversion of the energy of flow of air or water flows, characterized by the use of springs with which the strap through the bending axis kinematically linked introduced into the flow of the wing or airfoil, wherein the wing or airfoil is connected with the spring sling, and directly from the wing strap equipped with auxiliary rear and front straps (the frenulum), which limit the angle of attack from minimum to maximum progenipoietin movement axis relative to the center of application of the forces, creating torque which in turn leads to the change of angle of attack and tension lines.

2. The power plant is to convert the energy currents of air or water streams containing the spring, which is kinematically linked introduced into the stream along its direction of movement of the wing or airfoil, wherein the wing or airfoil connected with this spring sling, which is in the immediate vicinity of the wing has an additional short lines (bridle), made with the possibility of limiting the angle of attack in a given range, also contains a control unit angle of attack, made with the possibility to change the angle of attack of the wing from the minimum to the maximum, moving by means of the bridle fastening axis of the main lines relative to the center of application of aerodynamic forces and thus the occurrence of flutter.



 

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