JPS5993971A - Turbine for collecting kinetic fluid energy, particularly, wind force energy - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the field of energy harvesting devices, particularly wind turbines, and is directed to turbines for harvesting kinetic fluid energy, especially wind energy.

Various types of wind energy harvesting devices exist in practice, which are constructed as turbines with blades, which are either mounted on a shaft and interconnected via air passages, or not. .

Although some results have been obtained with these known turbines, their efficiency is low due to their geometry.

In fact, the blades of these turbines are generally constituted by semi-cylindrical surfaces mounted on a rotating shaft and offset to correspond to the fluid inlet cross-section into the blade, so that the effective volume of the blade is is relatively large for a given wing cross section,
Its drag coefficient is large.

The aim of the invention is to overcome the above-mentioned drawbacks.

In fact, the object of the invention is to provide a turbine for the collection of kinetic fluid energy, in particular wind energy, which turbine consists mainly of two sets of blades fixed to a rotating shaft, these blades being symmetrical about the axis of rotation,
Each wing has a hyperbolic horizontal section extending at a central angle of preferably slightly less than 180° and a vertical section whose projection plane is approximately elliptical, the wings being shaped so as to form two crescent-shaped openings. They are offset from one another at the level of the joint surfaces, and the ends of the openings are constricted at each junction between the sections to form a passageway of semi-circular cross section.

The invention will be further understood by the description of preferred non-limiting embodiments set forth below with reference to the accompanying drawings, in which: FIG.

According to the invention, as shown by way of example and in particular in FIGS. 1 and 2, a turbine for the collection of kinetic fluid energy, in particular wind energy, is primarily attached to a rotating shaft 2 and having a symmetrical shape about said axis 2. It is composed of a set of blades 1.

Each field 1 preferably has a hyperbolic horizontal section (FIG. 2) extending at a central angle of slightly less than 180° and a vertical section whose projection plane is approximately elliptical.

These wings 1 are assembled to each other offset at the level of the joint surfaces so as to form two crescent-shaped openings 3, each end of which has a semicircular cross-section. It has a constriction 4 forming a passageway which opens into the interior of the volume defined by the wings 1.

The turbines obtained in this way are constructed by mathematical curves, i.e. circular or elliptical assemblies, thus resulting in highly aerodynamically shaped blades and also increased efficiency.

According to a feature of the invention, the inner surface of each field 1 is continuously constricted inwardly to increase the velocity of the moving fluid within the turbine.

Each field 1 is preferably constituted by a hyperbolic helical section with a horizontal section extending to a surface section with a central angle slightly smaller than 1806, so that the fluid contained inside the turbine can be evacuated precisely.

Further, as shown in FIG. 3, since the blades 1 do not extend to an angle of 18°, there is a gap between the plane passing through the end of one blade 1 far from the axis 2 and the end of the other blade 1 on the side of the axis 2. The corners are acute, thus promoting air flow within the fluid outlet of the turbine.

According to a variant embodiment of the invention (not shown), it is also possible to form a turbine with blades extending at a center angle of 180'.

Furthermore, the turret according to the invention forms a significantly wider fluid passage 5 compared to existing turbines of the same size and type, and its diameter is larger than that of turbines with a corresponding square or rectangular vertical section, so that the driving torque is reduced. is larger.

Furthermore, since the volume formed by the rotation of the blades 1 has a very favorable aerodynamic shape, ie a low drag coefficient, the efficiency of the turbine is significantly improved compared to existing turbines of the same type.

The turbine according to the invention operates as follows.

Air enters the opening 3 between the two wings 1 and exerts pressure on the inner surface of the respective wing. The air hits said surface and creates turbulence, and the velocity thus obtained inside the turbine volume causes
On the other hand, before the air is discharged from the opening 3 of the other wing, a drag force is created on the opposing inner surface. This movement of air within the turbine causes the other blade to rotate about its axis, and the shape of the blade has the effect of increasing drag and torque, thereby improving efficiency.

According to another feature of the invention, the turbine has in its internal volume seven or more rotary bearings, generators or other mechanical, electrical It may include physical or electronic elements.

Furthermore, the turbine may be equipped with signal or lamp-shaped light emitting elements in its internal volume. Such an embodiment provides an air turbine for signaling purposes or preferably for aesthetic or decorative purposes.

According to another characteristic of the invention, the surface of the wing 1 is provided with photovoltaic cells 6, as shown in FIG. It is integrally formed with and supplies auxiliary electrical energy.

As will be appreciated, the invention has been described as a turf turbine. However, the turbine can also be operated with other fluids, especially water.

Naturally, the invention is not limited to the specific examples described above and the accompanying drawings. Especially from the perspective of the composition of various elements,
Alternatively, modifications are possible by substituting equivalent techniques without likewise leaving the scope of protection of the invention.

[Brief explanation of the drawing]

FIG. 1 is a front view of a turbine according to the present invention, and FIG.
3 is an enlarged perspective view of said turbine, and FIG. 4 is a view similar to FIG. 1 showing a modified embodiment of the invention. 1... Wings, 2... Rotating shaft, 3...
... opening, 4 ... constriction, 5 ... passage, 6 ... photovoltaic cell. −Snoring

Claims (6)

[Claims] (1) A turbine for collecting kinetic fluid energy, especially wind energy, said turbine basically consisting of a set of two blades fixed to a rotating shaft, said blades being symmetrical about said rotating shaft. and each preferably 18
The wing has a hyperbolic horizontal cross section extending to a central angle slightly smaller than 0° and a vertical cross section whose projection plane is approximately elliptical, and the wing is configured to form two crescent-shaped openings. The kinetic fluid energy, in particular, is offset from one another at the level of the joint surfaces, and the ends of said openings are constricted to form a passage of semi-circular cross section at each joint point between the cross sections. Turbines for collecting wind energy. 2. The turbine of claim 1, wherein the inner surface of each blade is continuously narrowed inwardly to increase the velocity of the moving fluid within the turbine. (3) Patents comprising one or more rotating bearings, generators or other mechanical, electrical or electronic elements in the interior volume at the level of the joint between the blades that combine in the wing. A turbine according to claim 1 or 2. (4) Claims 1 to 3, comprising a light-emitting element in the shape of a signal or lamp in the internal volume.
The turbine according to any of paragraphs. (5) The outer surface of the wing is preferably integral with the wing -6
5. A turbine according to any one of claims 1 to 4, which may be provided with a photovoltaic cell formed in a cylindrical shape and supplying supplementary electrical energy. 6. The turbine of claim 1, wherein the blades are configured to extend at a center angle of 180°.