ES1070084U - Protective housing for rotor type savonius (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Savonius type rotor protection housing having a slotted cylindrical configuration formed by a number n of vanes (of curved or straight section) arranged vertically, displaced and overlapping each other and joined at their upper and lower ends to two washers or discs (see figure 2). The vanes can be articulated to limit the flow of air in conditions of very strong winds. (Machine-translation by Google Translate, not legally binding)

Description

Protective housing for Savonius rotor.

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a housing protector for the Savonius type wind turbine.

The device is composed of a set of blades forming a longitudinally grooved cylinder surrounding the Savonius rotor. This housing performs several functions: in addition to protect the rotor, eliminates wind resistance against the  rotor, channels the air and compresses it a little (accelerating it). It also picks up a larger strip of air, that is, channels to the mill more air than would come without the housing.

Background of the invention

The common Savonius rotor has a great drawback of energy efficiency: The wind that drives the blades on one side of the rotor also stops them on the other side of it. This reduces the energy efficiency of the device greatly. (See
Figure 1).

There are semi-cylindrical housings that hide the wind the part of the rotor that opposes resistance, these housings they are provided with a tail with which they are oriented in the direction of the wind.

The housing model of the present invention does not you need to move (saving a mobile element to the whole and eliminating energy losses in reaction time). Besides all the air entering the housing will be redirected in the direction of blade thrust.

Description of the invention

The protective housing is composed of a number n of vertical blades fastened at their upper ends and lower than two washers (forming a grooved cylinder (See figure 2). The blades, overlapping each other, leave some grooves between they through which the air passes to the rotor, but only where to the rotor He is interested (See figure 3). The strip of air that does not favor the Rotation of the rotor is deflected by the carcass without affecting the rotor blades against its direction of rotation, thus avoiding the loss of efficiency of the Savonius rotor, all the air that enters, even through the channels that remain less in the wind direction, will be redirected in the thrust direction of the blades. The air passage groove between the blades is wider at the entrance than at the exit, so that the air suffers a acceleration before hitting the rotor blades (See figure 4). In this way the housing not only prevents the loss of energy efficiency but also channels the rotor to the air faster than wind outside. Being the housing wider than the rotor radius, the entire thickness of the it represents a larger strip of wind that is channeled to influence the blades (See figure 5).

If the blades are articulated at their ends, these become gates that actuated simultaneously control the flow of air to the rotor, and may decrease or even completely cut the passage of air inside if Very strong winds to protect the rotor.

Brief description of the illustrations

Figure 1: Shows the plan view of a rotor Savonius and how the wind affects both the blades it drives as in those who turn against.

Figure 2: Shows a three-dimensional perspective of the structure formed by the blades subject to the washers.

Figure 3: Plan view showing how the wind hits the housing.

Figure 4: Detail of the arrangement of the Blades and their effect on the wind.

Figure 5: Comparison of useful wind with and without housing for the same rotor diameter
Savonius

Description of a preferred embodiment

The protective housing for the type rotor Savonius is formed by a number n of blades (of curved section or straight) arranged vertically, displaced and overlapping between yes and attached at its upper and lower ends to two washers or discs forming a cylindrical structure with grooves (See figure 2). Inside the structure is a cylindrical space free that the Savonius type rotor will later occupy. The housing is fixed to the structure of the Savonius rotor. Blades they can be articulated to close the air flow in very strong wind conditions.

Claims (1)

1. Protection housing for rotor type Savonius featuring a grooved cylindrical configuration formed by a number n of blades (curved or straight section) arranged in vertically, displaced and overlapping each other and united in their upper and lower ends of two washers or discs (See figure 2). The blades may be articulated to limit the flow of air in conditions of very strong winds.