Power plant to convert energy of air or water flow currents

FIELD: power engineering.

SUBSTANCE: power plant for conversion of energy of air or water flow currents comprises a power takeoff shaft, with which a wing 1 or an airfoil is connected kinematically via a movable axis and introduced into the flow along with its motion. 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 with a sling 4. Directly near the wing 1 the sling 4 has auxiliary rear and front slings with a function of attack angle limitation. The power plant comprises a device for control of the attack angle 2 from the minimum to the maximum level, made as capable of moving the spring-loaded axis relative to the centre of application of aerodynamic forces depending on direction of crankshaft 5 movement, and as a result from head of air or water medium.

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

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 troubleclef 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 R is the result that is significantly complicated kinematics of the device, having trouble converting a reverse motion of the winch in a unidirectional rotation.

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 can peobrazovyvaet 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 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 by the fact that the power plant is to convert the energy currents of air or water streams containing the shaft, through which the bending axis kinematically connected part of the stream along its direction of movement of the wing or airfoil, wherein the shaft is made in the form of a crankshaft, and a wing or airfoil is connected with the crankshaft sling, and directly from the wing sling is supporting the front and rear sling (bridle) with limit function of angle of attack, also contains the device control the angle of attack from the minimum to the maximum level, made with the possibility to move the spring-loaded axis relative to the center of application of the aerodynamic forces depending on the direction of motion of the crankshaft and, as a consequence of the pressure of the air or the water environment.

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

The claimed solution to the prototype is that the angle of attack is changed automatically (without motor) depending on the position of the crankshaft aerodynamic forces acting on the aerodynamic control device of 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 aerodynamic controls 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 reversible motion libido is in unidirectional rotation.

The administration wing is due to the change of presentation of the Central lines around the center of application of the forces (the length of the bridle fixed). The force of the wind pressure varies in accordance with movement of the crankshaft (upwind or downwind). Proportionately the wind pressure varies the tension of the elastic elements (springs), which slip into the groove axis mounting 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.

The invention 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 and figure 2 shows a General view of the plant for different versions of the wing (airfoil), where 1 - Wing (airfoil), 2 - Device control angle of attack (UWUA), 3 - Strut, 4 - Line, 5 - Crankshaft, 6 - Axis rotation.

Figure 3 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 7 - axis, moving freely in the groove and prikreplena the two springs and the sling, 8 - spring (stationary), 9 - spring (adjustable), 10 - position sensor axis (e.g., magnetic), 11 - drive lift springs.

Explanation: the angle β is selected as β=0,5×(αmaxαmin), where α is the angle of attack of the wing.

For example: extreme angles of attack αmin=10 deg. αmax=80 deg. Then: β=35 deg.

Figure 4 shows the beginning of the movement of the wing forward (against the wind) to change the angle of attack, where 12 is the direction of thrust of the crankshaft. The beginning of the movement of the wing forward (against the wind) to change the angle of attack. The left spring is compressed, and the right is stretched (due to two factors: the mass-inertia of the wing, increasing the air pressure in the cubic power of the wind speed). On the wing there torque of the crankshaft (in the direction of - 12) counterclockwise. The angle of attack is reduced to until enables the length of the sagging bottom lines (bridle) to its tension. 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 5 shows the movement of the wing forward (against the wind) after the change of angle of attack. The crankshaft moves counter-clockwise and pulls the strap in the direction 12. The bottom (for the latter) bridle tight. Angle of attack =αmin. The resultant force of the three forces (drag, pull the main lines and tension the auxiliary rear bridle) move the wing behind the crankshaft.

Figure 6 shows the beginning of the movement of the wing back (in the wind) to change the angle of attack. The beginning of the second half. The crankshaft moves counter-clockwise and releases the strap in the direction of 12. Now the left spring is stretched, and the right is compressed (due to the reduction of air pressure in the cubic power of the wind speed). On the wing occurs torque clockwise}. The angle of attack increases up until the height droopy upper bridle (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 back by the wind from the crankshaft.

7 shows the movement of the wing back (downwind) after the change of angle of attack.

The second half-period. The crankshaft moves counter-clockwise. Wing with greater force pulls the crankshaft counterclockwise in the direction of 12.

The lower (rear) bridle weakened. The angle of attack of the winged =αmaxWorking stroke. The force of the wind maximum at the maximum angle of attack.

On Fig shows what enerator 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 13 - auxiliary lines (bridle), 14 - guide rollers 15 to the main sling, 16 - Float, 17 - Barge.

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 (Fig.1-2). contains a shaft 5, which is kinematically connected part of 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, rotating around the axis 6. Wing 1 or aerodynamic profile associated with the crankshaft of the tape 4, and a sling attached to a movable spring-loaded axis, which can move about the point of application of the aerodynamic forces.

Thus, during one half-cycle of an air or water stream does a great job (let's call it positive, and for the second half-cycle is small, but in the opposite direction (let's call it negative). Total work and will be useful work is Oh, made a thread for the period.

The entire 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 can be positioned flywheel. Also on the axis 6 can accommodate any number of elementary (working on one shaft) 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 (also to water flow, such as sea currents).

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 power plant is to convert the energy currents of air or water streams containing the shaft, through which the bending axis kinematically linked introduced in the flow direction is its movement the wing or airfoil, characterized in that the shaft is made in the form of a crankshaft, and a wing or airfoil is connected with the crankshaft sling, and directly from the wing sling is supporting the front and rear sling (bridle) with limit function of angle of attack, also contains a control unit angle of attack from the minimum to the maximum level made with the possibility to move the spring-loaded axis relative to the center of application of the aerodynamic forces depending on the direction of motion of the crankshaft and, as a consequence of the pressure of the air or the water environment.



 

Same patents:

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