JPS6282280A - Setting method for wind hold rear induction plate of savonius wind mill - Google Patents

Abstract

PURPOSE:To improve the efficiency of a wind mill by providing a wind hold induction plate along the outer circumference of revolution of a former wind hold rotary vane with in a range of an angle smaller than 90 deg. when the rotary vane is in a neutral position. CONSTITUTION:A rotary vane E is in a neutral position where the vane is rotated by an angle of R, for example 60 deg., from the position for a former vane, and a reference line, in place of a former line a-a', is a line b-b' which connects a center O and a point H on the outer circumference of the rotary vane revolution where the point H is located in a slip stream to the direction of air flow, to which direction the rotary vane E is neutral. And a wind hold rear induction plate E is set up on a circular arc opposite a central angle of theta along the outer circumference of the vane revolution with respect to the reference line b-b'. With this, an excessive wind hold, that is, an over-hole phenomenon can be avoided, besides, in this case of the rotary vane position, as an air flow having the width of D flows into the rotary vane which is in a neutral position because of the less quantity of wind hold, not only a wind hold effect is improved, but also the relatively smooth revolution of the vane can be effected. Thus, the efficiency of a wind mill is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching a guide plate after receiving flow to a Savonius wind turbine. The conventional guide plate after receiving flow is based on the line connecting the point on the outer circumference of the receiving blade and the center point of the turning circle when the blade (in the case of two-bladed blades) is directly facing the flow direction. line, and with this line as a reference point, a guide plate was set up after receiving the flow along the outer circumference of the wing.

For this reason, when the blades face directly in the flow direction, the force of the flow concentrates, which not only may cause overholding (when the flow velocity is high), but also has the drawback of increased rotational unevenness.

In this invention, by devising the method of attaching the guide plate after receiving the flow,
A post-reception guide plate is not installed at the position where the blade faces directly in the flow direction, and as the blade approaches the neutral position, the post-reception guide plate guides the flow and covers the loss of reception flow. This not only improves turning efficiency by avoiding overholding, but also reduces rotational unevenness and smoothes the rotation.

This will be explained with reference to the drawings.

FIG. 1 shows the mounting position of a conventional post-reception guide plate. Wing E
is directly facing the flow direction G, and with the line aa' connecting the point H on the turning outer circumference and the center O at that time as the reference line, the arc-shaped flow receiving guide plate A of L is along the turning outer circumference. is set up.

In this example, L■ is 45°, but until the point H on its outer periphery reaches the line dd', the blade E becomes as if it were directly facing the flow direction, and therefore the flow velocity increases. If it is too early, an overhold phenomenon occurs and the efficiency of the wind turbine decreases.

FIG. 2 illustrates an example of this invention, but the wing E is at a position rotated by LR from that in FIG. 1 (in this case, LR is 60°), and the reference line is not aa' but When the wing is in a neutral position with respect to the flow direction, the line bb' connecting points H' and O on the swirling outer circumference of the wing on the rear side in the flow direction is used as a reference line. A trailing guide plate B is set. This not only avoids the overhold phenomenon, but also reduces the width D for this blade position.
The flow shown by will flow into the wing, which has less flow and is close to neutral, which not only enhances the flow reception effect but also makes turning relatively smooth.

As is clear from the above explanation, the efficiency of the wind turbine is improved by this method of attaching the guide plate after receiving the flow.

[Brief explanation of drawings]

The drawings are both plan views of FIG. 1 and FIG. 2, but FIG.
The conventional example, FIG. 2, is an example of the present invention. that's all

Claims (1)

[Claims] When installing a guide plate after receiving flow from a Savonius wind turbine, the blade (
In the case of two-bladed blades), the line connecting the point on the turning outer circumference of the rear wing in the flow direction and the center point of the turning circle when the blade is in a neutral position with respect to the flow direction is defined as zero degree. As a standard,
A post-receive guide plate for a Savonius wind turbine, characterized in that the post-receive guide plate is installed within an angle of less than 90 degrees along the swirling outer circumference of the receive blade when the blade is in a neutral position.