DE102012019723A1 - Flat structure of semi-permeable water wheel blade for generating power, alters water permeability based on pressure and flow conditions on blade surface, and position of blade arm during rotational movement of water wheel blade - Google Patents

Abstract

The flat structure has a specific portion in which water of high resistance is flowed to generate power. The water permeability is altered based on pressure and flow conditions on blade surface, and position of a blade arm during rotational movement of a water wheel blade. The water is flowed from high permeable side to other side. The water permeability level is maintained uniformly over the whole region. The speed difference of the water flow is compensated with a turning wheel.

Description

The invention relates to the production of energy with a waterwheel. In this case, the paddle wheel surface is used as an immediate force transmitter of the water power to the waterwheel. There are several ways to increase the efficiency of the blades. Here, this is done by a semi-permeability of the blade surfaces according to the claim.

Submissive and deep water wheels are built with a relatively large diameter. Only a small part of a paddle arm, the paddle wheel surface, plunges into the channel. Thus, the energy consumption for the immersion and emergence of the blades is reduced. The blade surfaces also act optimally during their circular motion around the wheel axle when they can move tangentially in the flowing water and thus convert the force into the rotary motion without great force shearing.

It is known that the shape of the blade surface can be improved fluidically with respect to a flat blade surface, z. B. by a rounding, cf. Zuppinger wheel; Hemisphere bucket, too DE 196 32 793 A1 ,

It is also a not purely radial arrangement possible to reduce the dip resistance. Thus, the entire blade surface by tilting or folding mechanisms act more optimally by the surfaces z. B. always stand vertically in the water, so-called. Exzentergesteuerte blades. See also DE 101 34 522 B4 ,

In large water wheels, where only the ends of the arms serve as blade surfaces, the negative effects are indeed effectively reduced, since the blades are largely tangential when on / or. Move up. However, large water wheels are expensive and expensive to install.

The shape of the blade surface, as well as twisting reduce the resistance at a small diameter only insufficient and have an unfavorable effect on the shear force.

The tilting mechanisms are usually complex to build and energetically often questionable, since the mechanisms themselves consume energy.

The greater the radial portion of the blade surface on the water wheel arm, the less favorable is the ratio of energy consumption for immersion / emergence and energy production in the channel.

The object of the invention is the solution of this problem.

The respective blade surface should during its circular motion in the water as long as possible to cause a low resistance, d. H. permeable to water until it reaches a point where it can positively affect the torque. Otherwise, the area should provide great water resistance, d. H. be water-impermeable when it unfolds effect to the torque.

This can be achieved by the surface provided by the one side has high resistance, flows from the other side but is permeable to water. This is achieved, for example, by replacing the entire blade surface with at least one or more blade-like partial surfaces, which are rotatably mounted and can open on immersion and emergence, but are closed when flowing through the channel. In claim other types are described.

Overall, so the loss of power (resistance) for the rotating wheel in the water less without jostling when inflated. Even in the air above the water surface offers the semi-permeable surface less resistance.

With appropriate design, individual surface elements in each phase of the rotary motion can be used individually positive. This can mean advantages for small wheel diameters, since the difference between the water flow velocity and the respective tangential velocity of the blades from the wheel center to the wheel circumference can become relatively large.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19632793 A1 [0003]
• DE 10134522 B4 [0004]

Claims (4)

Semi-permeable water wheel vane surface The patent relates to a Wasserradschaufelfläche, which is involved in a water wheel by more effective power gain that the respective blade surface only in the phase in which it means a gain in strength through the flowing water offers a high water resistance, that is impermeable to water. In phases where no power gain can be generated, the blade surface is made water permeable, thus causing a lower resistance. The blade surface is insofar water semi-permeable. The change in the water permeability in the rotational movement can be made dependent both on the pressure or flow conditions on the blade surface and on the position of the blade arm in the rotational movement. It is also a control with floating elements conceivable. Furthermore, any surface arrangement comes into consideration, which flows from the one hand flows high resistance, flows from the other side but is permeable to water. The blade surface does not have to have the same homogeneous water permeability over the entire surface. As a result, speed differences which result radially in a rotating wheel can be compensated. A surface of individual foldable elements A water wheel blade surface according to the main claim, characterized in that the entire blade surface is replaced by at least one or more lamellar partial surfaces, which in turn are rotatably mounted (eg by hinges) and can preferably open in the direction of the center of the wheel during immersion, the degree of opening should be limited. The individual partial surfaces can thereby open upwards in the immersion phase, and are closed as soon as the flow component of the flowing water becomes greater than the flow at the partial surfaces caused by the rotational movement of the wheel. When they emerge, the flaps open again (now down) as soon as the pressure force of the flowing water subsides and the water above the blade is to escape. Blade surface made of perforated plates A Wasserradschaufelfläche according to the main claim, characterized in that it is made by two or more superimposed perforated plates, wherein the perforated plates are arranged displaceably to each other. If the holes overlap, the surface is permeable to water, the holes and the connecting webs are superimposed, the blade is impermeable to water. The displacement of a plate can in this case preferably take place via a switching mechanism depending on the position of the blade in the rotational movement, for example with a switching mechanism on a part which is not involved in the rotation of the wheel. The displacement can also be controlled for example via pressure-sensitive elements on the waterwheel or floating elements on the plates. Vane surface of tangentially arranged lamellae A water wheel vane surface according to the main claim, characterized in that it consists of tangentially (not necessarily exactly), lamellar surfaces or webs whose flow resistance is flaky, contrary to the direction of flow of the surface Flare upright elements) depending on the direction of flow of the surfaces is different.