Title of Invention

WIND ENERGY GENERATOR

Abstract

“Wind energy generator” comprising plurality of blade pairs (40) each blade pair (40) comprising of one lower blade (10) and one upper blade (20) wherein at least three blade are provided. Blades each of the blade pairs (40), one lower blade (10) and one upper blade (20) are fixed to blade supporting shafts (70) and (80) respectively. Blade-supporting shaft (80) is supported in the bearing housing (6) and blade support shaft (80) is supported in the bearing housing (61). Blade support shafts (70) and (80) are vertically aligned one over the other, keeping blade support shaft (80) above the blade support shaft (70). The blades (10) are fixed on the blade support shaft (70) and upper blades (20) are fixed on the blade support members (80) and support shafts coupled to each other by gear pair (19). In second embodiment frames (330) being provided with plurality of blade pairs (340), each blade pair (340) comprising two blades, one lower blade (310) and one upper blade (320); the said blades being fixed to the blade support members (307) and (308) respectively.

Full Text

FORM 2 THE PATENT ACT 1970 & The Patents Rules, 2003 PROVISIONAL / COMPLETE SPECIFICATION (See section 10 and rule 13) 1. TITLE OF THE INVENTION WIND ENERGY GENERATOR 2. APPLICANT (a) NAME : Aga Khushroo Jamshed (b) NATIONALITY: Indian (c) ADDRESS : Sr. No. 3184, Aga Industries Compound, Opposite S.K.F. Chinchwad, Pune 411 033, Maharashtra State, India 3. PREAMBLE TO THE DESCRIPTION PROVISIONAL i COMPLETE The following specification describes the The following specification invention. particularly describes-invention and the manner in which it is to be performed. 4. DESCRIPTION (Description starts from page 2) 5. CLAIMS: N.A 6. DATE AND SIGNATURE: Given at the end of last page of specification. 7. ABSTRACT OF THE INVENTION: N.A Title of the invention: Wind energy generator. Field of invention: This invention relates to wind powered machines, which use wind velocity to generate the power. Prior Art: The wind energy generators of the prior art are popularly known as windmills. The present windmills generally have a fan like structure with a horizontal shaft having a number of blades mounted on hub. The shaft is supported on a structure and is provided with a swiveling arrangement, so that it can swivel through 180 degrees in horizontal plane. As the wind passes through the blades, it is deflected from its straight path by the blades, the blades being at an angle to the wind direction. This deflection of the wind flow creates reaction on the blades and blades are forced to move causing the rotation of the hub and shaft on which they are mounted. In this method the maximum useful deflection of the wind can be 90 degrees and hence only a small part of wind energy can be utilized. The windmills of this type need high wind velocity for their operation and thus cannot be used where the wind velocities are low. Moreover as the rotating blades are in the vertical plane, it is necessary to keep the plane of the blades oriented across the wind direction-using device similar to weathercock. This arrangement can cause gyroscopic reaction on the main structure, which has to be considered while designing the structure. Summery of invention: The objective of this invention is to harness power from low wind velocities which is not possible with the windmills of the prior art. Other objective of this invention is to eliminate the requirement of the weathercock device required to keep the plane of the blades at right angles to the wind direction all the times thus eliminating the gyroscopic forces on the tower. Yet another objective of this invention is to utilize the force of the wind more effectively by using impact of the wind instead of reaction as in case of windmills of the prior art. Present invention, "Wind energy generator" comprises a vertical shaft on which a hub is provided. The blades are mounted in a horizontal plane on the hub in blade. The blades are mounted in pairs on each side. Minimum of three such pairs can be sufficient for the operation of the invention however four blade pairs are preferable for optimum operation. In this case it is necessary that while one side of the blade pair encounters maximum drag of the wind, the diametrically opposite pair of the blades should be in minimum drag position so that, maximum torque is exerted on the shaft to generate maximum power. Two blades in each pair are geared to each other in such a way that the blades balance the gravitational force on each other, thus eliminating the effect of gravity on the blades. Due to this gearing the opening of the blades in the pair is perfectly symmetrical which helps achieving maximum drag. Description: The invention "Wind energy generator" is now described in detail with the help of following figures. Fig. 1 shows the elevation to the invention windmill. Fig. 2 shows the top view of the fig. 1. D/kaj/aga/prov-spec windmill-1-final 3 Refer fig 1 & 2; these figures show the invention with its embodiment having four pairs of blades. However for simplicity only two of the four pairs are shown in the above figures. It may be noted that there are two more pairs of blades at right angles to the two pairs shown making the angular pitch of the blade pairs 90 degrees. The invention windmill comprises, tower 1, which provides the basic structure for mounting the windmill at height sufficient to get maximum exposure to the wind. Support 2 is mounted on the top of the tower 1 on which a bearing housing 3 is fixed. Shaft 4 is supported by the bearings provided in the bearing housing 3 in such a way that it is free to rotate about its axis oriented in vertical direction. A box shaped support 5 is fixed on the shaft. The shape of the box preferably decided by the number of pairs of the blades to be used in the windmill. For example the windmill shown in the figure is shown with four pairs of blades the shape of the box support in its plan is square. Irrespective of the above any other shape suitable, e.g. round etc. can be used. Secondary bearing housings 6 are fixed on the faces of the box shaped support 5 two on each side face aligned on a vertical line. A blade-supporting shaft 7 is supported in each of these bearing housings 6. Two adjacent blade supporting shafts are supported to each other at the outer end by means of end supports 8, while the end supports 8 are supported by connecting them to extended end of the shaft 4 by means of tie ropes 9. As the blade pairs do not open to their full extent i. e. 180 degrees, there is no D/kaj/aga/prov-spec windmill-1-final 4 possibility of ropes 9 fouling with the blades 10. Two shafts 7 on one side are coupled to each other by pair of gears 19. The blades 10 are fixed on the blade support shafts 7 one on each shaft. Thus in this arrangement there is a pair of two blades on each side and such three or more, preferably four pairs of the blades are sufficient for the optimum operation of the windmill. At the lower side of the bearing housing 3, a gear box 11 is provided which is coupled in turn to a load like electricity generator 12. In the above arrangement the opening of the blades 10 against the wind can be controlled using a mechanism which can control the angle of turn of the shafts 7 or gears 9 in case of hazardous situations like very high wind speeds; which is not shown and described here. In another embodiment the windmill can have stack of multiple blade pairs arranged one above the other fixed in a common frame in place of single blade pair described in the above windmill. In this case, smaller width of blades can be used to produce same force, at the same time improving response of the blade for opening against the wind due to less moment of inertia of the blade about its turning axis. Function: The invention "Wind energy generator" functions as follows. In the present invention if a pair of blades on one side is considered, it can be seen that due to the gear pair 19, when lower blade in the pair tries to deflect downwards the upper blade is pushed up. Thus the effect of gravity on both the blades of the D/lcaj/aga/prov-spec windmill-1 -final 5 pair is eliminated. Considering the direction of the wind as shown by the arrows "W" in the fig. 2 the blades on the right side pair face maximum drag as they tend to open against the wind drag, thus producing maximum force on them. It may be noted that the opening of the blades is symmetrical due to the coupling of the blade support shafts 7 by gear pair 19. Considering the left side blade pair, it can be seen that, this pair goes on closing against the wind force thus minimizing the drag on the same. This creates imbalance of the force on left and right sides thus creating torque on the shaft 4, which starts rotating to generate power. As the shaft rotates new pair of blades faces wind and opens while that on the opposite side closes. The operation continues till the wind is flowing. The blade pairs being oriented horizontally, the direction of the wind has no effect on their performance and the device like weathercock, which is required in case of the old windmills, is not required in this case. The rotating shaft 4 is connected to load like electricity generator 12 through gear box 11 for giving the useful output. Dated this 6th day of April 2006 Ashwini Durve Agent for applicant D/kaj/aga/prov-spec windmill-l-final 6

Documents:

605-mum-2006-abstract(16-4-2007).pdf

605-MUM-2006-Abstract-091214.pdf

605-MUM-2006-Claims Amended-091214.pdf

605-mum-2006-claims(16-4-2007).pdf

605-MUM-2006-CLAIMS(AMENDED)-(21-5-2012).pdf

605-MUM-2006-CLAIMS(MARKED COPY)-(21-5-2012).pdf

605-mum-2006-correspondence(11-2-2008).pdf

605-mum-2006-correspondence-received.pdf

605-mum-2006-description (provisional).pdf

605-mum-2006-description(complete)-(16-4-2007).pdf

605-mum-2006-drawing(complete)-(16-4-2007).pdf

605-mum-2006-drawing(provisional)-(18-4-2006).pdf

605-MUM-2006-Drawing-091214.pdf

605-MUM-2006-form 1-091214.pdf

605-mum-2006-form 18(12-2-2008).pdf

605-mum-2006-form 2(16-4-2007).pdf

605-mum-2006-form 2(title page)-(16-4-2007).pdf

605-mum-2006-form 2(title page)-(provisional)-(18-4-2006).pdf

605-MUM-2006-form 2(Title Page)-091214.pdf

605-mum-2006-form 3(16-4-2007).pdf

605-MUM-2006-FORM 3(21-5-2012).pdf

605-mum-2006-form 5(16-4-2007).pdf

605-mum-2006-form-1.pdf

605-MUM-2006-form-13-091214.pdf

605-mum-2006-form-2.doc

605-mum-2006-form-2.pdf

605-mum-2006-form-26.pdf

605-MUM-2006-Marked Copy-091214.pdf

605-MUM-2006-power of authority-091214.pdf

605-MUM-2006-REPLY TO EXAMINATION REPORT(21-5-2012).pdf

605-MUM-2006-Reply to hearing-091214.pdf

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