Method to convert energy of air or water flow currents

FIELD: power engineering.

SUBSTANCE: method to convert energy of air or water flow currents is characterised by using of a power takeoff shaft, with which a wing 1 or an airfoil is kinematically connected via a movable axis being introduced into the flow along with its movement. The power takeoff shaft is arranged in the form of a crankshaft 5. The wing 1 or the airfoil is connected with the crankshaft 5 using a sling 4, equipped with additional short slings in close proximity of the wing. Slings provide for limitation of the attack angle of the wing 1 in the specified range. With the help of the device to control the attack angle 2 the attack angle of the wing 1 is changed with a jump from the minimum one to the maximum one, moving with the help of the movable mass of the accelerometer rigidly connected with a cam the axis of the main sling relative to the centre of application of aerodynamic forces depending on the direction of the crankshaft 5 motion.

EFFECT: simplified design of a converter realised on the basis of the method, reduced metal intensity, higher manufacturability and as a result reduction of specific cost of a produced kW hour of power.

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 [F03B3/12, F03B7/00, F03B3/02].

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 for energy is set 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 (prototype) is a patent NL 1017171 on the Method of power generation at the expense of a kite, the rotating drum generator. The Central strap is missing. The wing is attached with two bridle, the length of which vary using the motor.

In that decision the angle of attack changes the motor. In the result, there is a need to increase the weight of the kite motor and power supply, there is an additional cost of electricity to the motor.

Control of the motor is an external control signal (for example, a signal for synchronizing the movement of the winch (winding/unwinding of the rope) and wing (angle of attack). Resulting in the need to have a system remote control motor and winch.

Sling alternately wound and unwound by the winch, i.e. reverse. In is the result of something much more complicated kinematics of the device, having trouble converting a reverse motion of the winch in a unidirectional rotation.

The objective of the invention is to provide a method for converting wind energy, on the basis of which is formed by a relatively simple design of the Converter to be more reliable than the prototype, and the ability to convert wind energy directly into rotational movement of the working body with its subsequent use to generate electricity.

The present invention is directed to the achievement of the technical result consists in simplifying the design of the Converter implemented on the basis of the method, the decrease of metal, improving technology and, as a consequence, a sharp reduction in the unit value generated kilowatt hour of electricity.

This technical result is achieved by way of converting the energy currents of air or water flows, characterized by the use of PTO, which through the bending axis kinematically connect the led to the stream along its direction of movement of the wing or airfoil, wherein the shaft are in the form of a crankshaft, and a wing or airfoil is associated with the crankshaft sling is fitted in the immediate vicinity of the wing updat the additional short lines (the frenulum), which provides restriction of the angle of attack of the wing in a predetermined range, and controls the angle of attack abruptly change the angle of attack of the wing from the minimum to the maximum, moving through the moving mass of the accelerometer rigidly connected with the Cam, the axis of the fastening main lines relative to the center of application of the aerodynamic forces depending on the direction of motion of the crankshaft.

The claimed solution to the prototype is that the angle of attack is changed automatically (without motor) depending on the position of the crankshaft inertial forces acting on accelerometric device control angle of attack. In the result there is no need to keep a kite with a motor and power supply, no additional energy costs for the operation of the motor, i.e. the economy.

Sync output shaft (crankshaft) with wing automatically using accelerometric device control the angle of attack on the wing. Resulting in no need to have the remote control system of the motor and the winch.

Sling rotates directly with the crankshaft rotating in the same direction. Which greatly simplifies the kinematics of the device, will have no difficulty with the conversion of the reverse motion of the winch in donapaula the Noah rotation.

The administration wing is due to a change in the position of the center lines around the center of application of the forces (the length of the bridle fixed). Inertial oscillations accelerometer shift in the groove, the axis of attachment of the wing to the sling in one direction or another in accordance with the direction of motion (forward/backward) of the crankshaft. This difference in itself characterizes the structural features that determine the difference in principle.

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

The invention can be implemented on the basis of the transducers, the device which is illustrated by a specific example, which, however, is not only possible, but clearly demonstrates the possibility of achieving a given set of features required technical result.

Figure 1 shows a General view of the plant for different versions of the wing (airfoil), where 1 - Wing (airfoil kite), 2 - Accelerometric device control angle of attack (AUUUA) in the center of aerodynamic forces, 3 - Strut, 4 - Line, 5 - Crankshaft, 6 - Axis rotation.

Figure 2 shows the control device for angle of attack (YYY is), where 7 - Cam, UUUA, 8 - axis of rotation 9 of the inertial mass of the accelerometer, 10 - rear sling (frenulum), 11 - front auxiliary sling (frenulum). Unstable neutral position. Any deviation of any parameter leads to a sharp change of angle of attack in one direction or another.

Figure 3. The movement of the wing forward (against the wind) to change the angle of attack. The accelerometer takes Cam to the left. On the wing occurs torque in a counterclockwise direction. The angle of attack is reduced to until enables the length of the sagging bottom lines (to her relief). As soon as she stretched, her strength tension balances the torque and the angle of attack will stop. The system will be balanced relative to the wing (but then the wing will have a resultant force, driving him forward against the wind for the crankshaft, but with a small resistance).

Figure 4. The movement of the wing forward (against the wind) after the change of angle of attack. The lower sling taut.

Figure 5. The movement of the wing back (downwind, stroke). To change the angle of attack. The accelerometer rolled from the point of application of the forces, creating a tipping point, leading to a sharp increase in angle of attack.

6. The movement of the wing back (downwind, stroke). After changing the angle of attack. Front sling (frenulum) is stretched.

7 shows an example of generation of the ora in the water flow, similar to the work in the air stream. Only for positioning of the wing at the correct depth, it is desirable to use an additional float 16, where 12 - Barge, 13 - auxiliary lines (bridle), 14 - guide rollers 15 to the main sling, 16 - Float.

The invention provides a direct conversion of the vibrational motion of the wing into rotational motion of the crankshaft 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) contains a shaft 5, which is kinematically linked introduced into the stream along its direction of motion of the wing 1 or aerodynamic profile. You can use inflatable wing is lighter than air.

The PTO is made in the form of a crankshaft 5 (1), rotating around the axis 6. Wing 1 or aerodynamic profile associated with the crankshaft of the tape 4, and a sling attached to the movable axis which is set in motion about the point of application of the aerodynamic forces with the Cam 7 (Figure 2), which rotates in one direction or another, the mass of the accelerometer 9 depending on the direction of rotation of the crankshaft.

Thus, during one half-cycle air or water does a great job (let's call it positive, and for the second half of the period - a little, but in the opposite direction (let's call it negative). The total work will be useful to the work flow for the period.

All the power plant can be placed on a platform rotatable about a vertical axis in the direction of the wind vane. To improve the uniformity of rotation and smoothing of shocks on the axis 6 (Fig 1), you can position the flywheel. Also on the axis 6 can accommodate any number of elementary (working on one wing) power plants with the aim of increasing the total capacity, improve the uniformity of rotation and smoothing of shocks (as of cylinders in the internal combustion engine).

To increase reliability (in particular avoid the possibility of damaging slings rotating parts of the crankshaft, for example, the sudden change in wind direction) lines can pass through guide rollers.

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.

The method of conversion of the energy of flow of air or water flows, characterized by the use of PTO, which is passed through the bending axis kinematically linked introduced into the stream along its direction of movement of the wing or airfoil, characterized in that the shaft are in the form of a crankshaft, and a wing or airfoil is associated with the crankshaft sling is fitted in the immediate vicinity of the wing advanced short slings (the frenulum), which provides restriction of the angle of attack of the wing in a predetermined range, and controls the angle of attack abruptly change the angle of attack of the wing from the minimum to the maximum, moving through the moving mass of the accelerometer rigidly connected with the Cam, the axis of the fastening main lines relative to the center of application of the aerodynamic forces depending on the direction of motion of the crankshaft.



 

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