FR2464384A1 - High speed wind generator - uses second wind turbine mounted on tip of primary turbine blade whose rotation forces air through second turbine giving high shaft speed - Google Patents

Abstract

A primary blade (2) is oriented so that its rotation forces air through an auxiliary turbine. Wind flow (1) drives the primary blade (2) at a speed which is low for electric generators. The auxiliary turbine (6) is moved through the air at the velocity of the tip of the primary blade, resulting in a high shaft speed in the auxiliary turbine, allowing electricity generation with smaller ratios between the turbine and the generator. Electricity can also be generated by the auxiliary turbine (6) if the primary blade (2) is rotated by, for example, an electric motor when there is no wind.

Description

 The present invention relates to devices intended to capture the kinetic energy of a flowing fluid such as wind for example and this in view of transforming this energy collected in the form of other energies: of the domestic type; electricity for example.

 The purpose of the present invention is to produce a sensor assembly, or the device intended to transform the mechanical energy collected; Alternator or dynamo in the case of electricity production, either driven by a second sensor device, rotating faster than the first due to a flow of fluid, of higher speed, this flow being created artificially so to speak.

 The fact that the second sensor has a higher speed of rotation than that of the first sensor, thus makes it possible to reduce, or even eliminate the multiplier members, between the second sensor and the device transforming the energy collected.

 According to one embodiment of the invention, made with a view to rational construction thereafter, the type of sensor selected is that having a U / V ratio greater than 1, U being the most significant speed of movement of the driving vanes of the sensor, V being the flow speed of the fluid driving the assembly.

 In accordance with the invention, on the first sensor described above, there is arranged a second sensor assembly, studied and produced in order to drive any device, energy transformer, such as an alternator for example. Thus produced, the invention operates in the following manner. The flowing fluid by its kinetic energy drives the first sensor through these motor vanes.

 The mechanical energy thus captured, appears here in the form of a movement or displacement resulting from the rotation of the driving vanes, and by the same of the sensor device as a whole. The second kinetic energy sensor assembly due to its integral attachment to the first sensor assembly, also in motion, thus moving in the ambient fluid. In this case, the kinetic energy captured by the second device is due to the same movement of the latter relative to the ambient fluid, apparently immobile.

 The appended drawing (FIG. 1) illustrates by way of example an embodiment of the device according to the present invention. As shown; the device is driven by the fluid 1 and 1 '. The sensor 2 performs a movement of displacement 3, here in this case a movement of rotation, and causes, due to the integral fixing 4, a second sensor device 5 driving an energy transformer device 6.

 According to one embodiment of the invention, with a view to rational construction thereafter, the first sensor under the action of the flowing fluid, accomplishes its movement or displacement, at a speed multiple of that of the flow of the fluid. Thus the U / V ratio is greater than 1. Still in the same construction perspective, the second energy sensor, in a particular embodiment of the invention, is disposed integrally at the end of the first sensor achieving the speed of movement U the most important.

 In another embodiment of the invention, the direction or directions of rotation of the second sensor or sensor assembly are defined in order to allow an improvement in the efficiency of the assembly, by making the flowing fluid converge, directly on the first sensor, while allowing its divergence at the back of the latter. The accompanying drawing (fig. 2) illustrates this particular arrangement by way of example. The second sensor assembly 5, by its own direction or directions of rotation 7, causes a convergence 8 of the flowing fluid directly towards the sensor 2, and a divergence 9 of the flowing fluid at the rear.

 The present invention applies mainly to the construction of wind sensors, however an interesting variant could be applied to the capture of sea currents for example.

Claims (7)

 1 - Device for recovering kinetic energy from a flowing fluid, providing mechanical energy,  Characterized in that this mechanical energy is directly used in the form of a movement or displacement, resulting from the rotation of the driving vanes of the first sensor.  2 - Device according to claim 1,  Characterized in that a second sensor, or set of sensors for the kinetic energy of a flowing fluid, is disposed integrally on the first sensor.  3 - Device according to claims 1 and 2,  Characterized in that the second kinetic energy sensor, due to its arrangement integral with the first sensor, is set in motion or displacement in the ambient fluid.  4 - Device according to any one of claims 1 to 3,  Characterized in that the kinetic energy captured by the second device secured to the first, results from the very displacement of the second device relative to the apparently immobile ambient fluid.  5 - Device according to any one of claims 1 to 4 and according to a particular embodiment of the invention,  Characterized in that the realization of the movement or displacement, is accomplished at a speed multiple of that of the flowing fluid carrying the unit.  6 - Device according to any one of claims 1 to 5 and according to a particular embodiment of the invention,  Characterized in that the second sensor device is always arranged 1 integrally, at one end of the first sensor, achieving the highest speed of movement.  7 - Device according to any one of claims 1 to 6, and according to a particular embodiment of the invention,  Characterized in that the second sensor or similar sensor, by its own sense or directions of rotation, causes a convergence of the flowing fluid towards the first sensor, and a divergence of the flowing fluid behind the latter.