Driving mechanism

FIELD: power engineering.

SUBSTANCE: driving mechanism comprises a symmetric wing 1 arranged in an uneven flow of water with side walls 2, the axis 3 of which is installed in hinged supports 4 at rear ends of cross beams 5, connected by front ends through hinged joints 6 to a support structure 7, and also an actuating mechanism 9 connected with the axis of the wing 1 by means of a gear 8. The mechanism 9 is equipped with an elastic air cushion 11 arranged in the upper part of the wing 1 above water 10 filling its lower part 10, a lever 12, fixed on the wing 1, and vertical traction rods 13. Traction rods 13 are connected by lower ends with bearings 14 installed on the axis 3 and are attached by upper ends by means of springs 15 to the structure 7. Between the structure 7 and the lever 12 there are the following components installed in series - an elastic element 16 and a controller 17 of wing 1 position. In walls 2 there are holes 18. The top of the holes 18 is arranged below the upper point of the wing 1 profile and matches the level 19 of its filling water 10 and the lower border of the cushion 11, which is arranged in the form of an elastic shell 20, filled with air 21.

EFFECT: higher efficiency due to parametric amplification of rotary oscillations of a driving mechanism wing.

2 dwg

 

This device relates to a device for conversion into electrical or mechanical energy natural renewable sources of energy such as energy from sea and river currents, the water flows when you reset it with dams, reservoirs and hydroelectric power plants, and water flows for moving vessels. This device can serve as a drive for the Executive working machines such as generators and pumps. In addition, it can be used in propulsion the propulsion of ships.

Known power installation using the kinetic energy of the water flowing patent WO 9812433 A1, class 6 F03B 13/20 containing cascade shaped hydrodynamic profile, mounted on an elastic elements placed along their longitudinal axis and connected by vertical rods, also secured the lower ends of the elastic elements mounted vertically. The profiles can commit is not needed for drive operation, longitudinal and rotary oscillations around the transverse axes of the profiles, which requires an energy flow.

The disadvantage of this device is low efficiency due to the small amplitudes of the rotary oscillations around the longitudinal axes of the profiles, which does not allow to obtain the torque required to drive the electric preobrazovala who I am.

Known wave propulsion for ships on author. mon. The USSR №946396, CL VN 1/36, 1988, containing a support in the form of a rack attached to the hull of the vessel, horizontal symmetrical wing profile, which is hinged to the support, and the levers attached to the wing and through the power of the elements to the support. The power elements are made either in the form of springs or hydraulic cylinders. The disadvantage of this device is low efficiency due to the fact that the wing is airtight and, if there are no waves, needs external drive and hydraulic cylinders, actuated from the pressure source.

Known energy installation according to patent US 6652232, CL 7 F03 17/06 from 13.01.2002, in which electricity is produced by wind power, water in a river or tidal currents. The installation includes the elevon and rudder in the form of a wing with a symmetrical profile and is installed with the possibility of free rotation relative to the mounting point, is shifted forward relative to the neutral axis. The angle of attack of the blade change by adjusting the position of the elevon. The disadvantage of this device is low efficiency due to the small amplitudes of the rotary oscillations, because the wing is airtight and there is no air cushion and shimmering with rotary oscillation of the water.

Naib is more closest to the technical nature of the present device is a drive mechanism according to patent US 6323563 VA, CL 7 F03 13/10 from in 25.07.2000, containing placed in non-uniform flow of water symmetrical wing with side walls, mounted in swivel bearings on the rear ends of the traverse, which are attached to front ends by hinges to the support structure and connected to the wing by means of a transmission actuator. As the actuator uses a generator to make electricity. A significant drawback of the device is its low efficiency due to the fact that the side walls of the wing there are no holes, the wing is airtight and does not contain moving it under the influence of water flow airbags and shimmering water, which does not allow to obtain the parametric amplification of the rotary oscillations of the wing.

The purpose of this invention is to improve the efficiency of the drive mechanism due to the parametric amplification of the rotary oscillations of the wing.

This objective is achieved in that the drive mechanism containing placed in non-uniform flow of water symmetrical wing with side walls, the axis of which ends by hinges to the support structure, equipped posted at the top of the wing above the filling the lower part of the water of the elastic air bag, and attached to the wing lever and the vertical is different rods, which are connected the lower ends with bearings mounted on the axis of the wing, and attached at upper ends by means of springs to the support structure, between which and the lever installed in series elastic element and the position of the wing, the side walls along the length of the chord equal to twice the magnitude of the flow velocity, with holes, the top of which is located below the top of the wing profile about 0.2 thickness of the wing and coincides with the level of filling his water and with the lower boundary of an air cushion, which is made in the form of an elastic membrane and filled with air, and supporting structure made in the form of two arches, which mounted on the sides of the wing.

The invention is illustrated by drawings.

1 shows a drive mechanism on the side view. Figure 2 is a view along arrow C.

The drive mechanism includes placed in non-uniform flow of water lapping with velocity V, the symmetric wing (1) with side walls (2), the shaft (3) which is installed in the hinge bearings (4) on the rear ends of the traverse (5), which are attached to front ends by a hinge (6) to the support structure (7), and is associated with the axis (3) of the wing through the transmission (8) actuator (9). To improve efficiency at the expense of parametric amplification turning the vibrations of the wing drive mechanism equipped posted at the top of the wing above the filling the lower part of the water (10) of the elastic air bag (11), and attached to the wing (1) lever (12) and the vertical rods (13). Vertical traction (13) are connected the lower ends mounted with the axis (3) bearings (14) and attached upper ends by means of springs (15) to the support structure (7), between which and the lever (12) has been consistently found elastic element (16) and the controller (17) the provisions of the wing. In the side walls (2) wing length of a chord equal to twice the magnitude of the flow velocity, with holes (18). The top of the hole (18) is located below the top of the wing profile about 0.2 thickness of the wing is equal to (19) populates it with water (10) and the bottom elastic air cushion (11), which is made in the form of a flexible membrane (20)is filled with air (21). Supporting structure (7) is made in the form of two arches (22)secured on the base (23), wing (1) is placed between the arches (22).

The drive mechanism operates as follows.

When submerged wing drive mechanism (1), is suspended by means of rods (13), spring (15)that are installed on arches (22) of the support structure (7), is filled with water through the openings (18), compressing the elastic springs (15).

With full immersion wing (1) is filled with water (9) to (19), which coincides with the top of the maximum of holes (18) in the side walls (2) and the bottom air cushion (11), the implementation of the military in the form of a flexible membrane (20), filled with air (21). Axis (3) turn the wing, passing through point O is placed ahead of its center of mass, and wing as it is filled with water rotates together with the lever (12) in bearings (4) and (14) clockwise, compressing the elastic element (16). Therefore, the installation of the wing in the horizontal position by means of knob (17) the provisions of the wing due to the additional compression of the elastic element (16)acting on the lever (12).

Under the action of an uneven flow of water lapping with velocity V, wing (1) commits rotary oscillations about an axis Of at their own frequencywhere c2- stiffness of the elastic element (16), and the length of the lever (12), Im- the average value of the moment of inertia of the wing. The wing also makes a vertical vibrations on the y-axis on the rigidity of the c1springs (15)installed on arches (22) of the support structure (7).

When a rotary oscillations completely filled wing water is not flowing, so the moment of inertia is constant and does not depend on the rotation angle and time.

When a rotary oscillations are not completely filled wing (1) water (10) it alternately flowing toward the peripheral areas, and air cushion (11) is moved in the opposite direction in relation to water and changes shape. During one half-cycle rotary number of the oscillations of the wing elastic air cushion is displaced in one of the end positions and returned to the middle position, and for the full period makes it twice, that is, the frequency of movements of the airbag is equal to 2ω0. Conditional moment of inertia of the water in the volume of the airbag is:where ρ is water density, vn- volume airbags, r(t) is the conditional radius of inertia of the water in the volume of air cushion. The radius of gyration r(t) is minimum when the horizontal position of the wing (the line segment AB in figure 1) and significantly increases when it is turned due to the fact that the airbag receives a significant move with frequency 2ω0parallel to the wing chord at the height of the air cushion, is approximately equal to 0.2 thickness of the wing. When the displacements of the air cushion the radius of gyration r(t) and moment of inertiaalso change with frequency 2ω0and the value ofvaries considerably in time, as it is proportional to the value of r(t) in the second degree. Therefore, the moment of inertia is not completely filled with water wings, defined as the difference between the moment of inertia is completely filled wing and torque with frequency 2ω0.

Vertical oscillations of the wing beam (5), hinged at the points O and N (in the hinge supports (4) and the hinge (6)), rotated about a point N, while holding the wing from moving along the axis X. The wing, making the vertical vibrations of the Oia in water flow there is a change of angle of attack. However due to time-varying difference of the velocities on the upper and lower surfaces of the wing occurs the system is distributed along the length of its chord attached vortices and constantly coming from the rear edge of free vortices. Attached vortices move along the wing profile and create pressure pulsations, which are exposed through openings (18) in the wall (2) on an air cushion (11), compress it and move with frequency 2ω0. When this incoming flow is doing work on the compression of air bags and moving it. When compressed air cushion its volume decreases and is replaced by water, which causes an increase in the dynamic torque and rotation angle of the wing. This increases the movement of air cushion, and there is a further substitution of the free volume of the liquid. Dynamic effects on peripheral portions of the wing occur in time with the vibrations. Due to significant modulation of the moment of inertia of the wing when the height of the air cushion, comprising approximately 0.2 thickness of the wing is parametric amplification of its rotary oscillations, at a frequency of 2ω0occurs parametric resonance, if the external system (non-uniform flow) exceeds the loss of energy in an oscillating wing. Parametric oscillations occur only outside completely filled with water wing in the presence of elastic air cushion. As a result, along with the kinetic energy flow the energy of the bound vortices.

The maximum amplitude of the rotary oscillations are achieved when the uneven flow of water moves in one second by a length equal to half the chord of the wing, which is equivalent to the load torque. The value of the flow rate coincides with the value of half the chord length of the wing, or the value of the chord of the wing coincides with the double speed of flow. You can customize the wing on the known velocity of flow (e.g., velocity) in order to obtain the maximum amplitude of the rotary oscillations at the frequency of the parametric resonance. Intense vibrations of the wing is transmitted through the transmission (8) to the actuator (9) (a generator of electric current or pump). Thus, when a significant increase in the amplitude of oscillations at the frequency of the parametric resonance greatly increases the efficiency of the drive mechanism.

1. The drive mechanism containing placed in non-uniform flow of water symmetrical wing with side walls, the axis of which is installed in the hinge bearings on the rear ends of the traverse, which are attached to front ends by hinges to the support structure, and also associated with the axis of the wing through transmissionary mechanism, characterized in that, with the purpose of increase of efficiency due to the parametric amplification of the rotary oscillations of the wing, it has placed at the top of the wing above the filling the lower part of the water of the elastic air bag, and a lever, which is attached to the wing, and vertical rods connected lower ends with bearings mounted on the axis of the wing, and attached at upper ends by means of springs to the support structure, between which and the lever installed in series elastic element and the position of the wing, the side walls along the length of the chord equal to twice the speed of the oncoming flow, made holes, the top of which located below the top of the wing profile about 0.2 thickness of the wing and coincides with the level of filling his water and the bottom elastic air cushion, which is made in the form of elastic shells filled with air.

2. The drive mechanism according to claim 1, characterized in that the supporting structure is made in the form of two arches, which is fixed on the base on each side of the wing.



 

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