WO2015163779A1

WO2015163779A1 - Twin-blade turbine

Info

Publication number: WO2015163779A1
Application number: PCT/RU2014/000294
Authority: WO
Inventors: Dmitry Vladimirovich GLADYSHEV
Original assignee: Gladyshev Dmitry Vladimirovich
Priority date: 2014-04-22
Filing date: 2014-04-22
Publication date: 2015-10-29

Abstract

The invention relates to the wind-power engineering and is designed to convert kinetic energy of the wind into mechanical energy of axis rotation. The invention, twin-blade turbine, will reduce the cost of manufacturing turbines, through the use of simple design elements, and will increase the efficiency of the use of kinetic wind power by increasing the number of blades positions, which give a positive response of the turbine for axis rotation. Increase in efficiency is achieved by using dual blades, located evenly spaced in a circle equidistant from the turbine axis, parallel to each other, each of which is rotated by some angle around its longitudinal axis to ensure the angle of attack of the coming wind.

Description

Twin-blade turbine

Description

The invention relates to the wind-power engineering and is designed to convert kinetic energy of the wind into mechanical energy of axis rotation.

There are several main types of wind generator turbine with longitudinal axis of rotation. As a rule they differ in form or number of blades:

- hollow semi cylinder blades, attached directly to the turbine shaft;

- cylinder blades, distanced from the shaft and attached by fittings;

- considerably flat straight plates, substantially parallel to shaft axis, turned on certain angle around its own longitudinal axis;

- straight plate blades, parallel to shaft axis with aerodynamic section;

- plate blades, with aerodynamic section and spiral bend along the turbine circuit;

- blades with variable section or rotational.

Main disadvantages of the turbine types mentioned above:

- blades manufacturing complexity (in case of aerodynamic section blades, spiral blades, blades with variable section or rotational), involving expenses on the blades

manufacture;

- great number of blade positions during rotation round the shaft, that are idle, as the blade in such a position on the wind stream produces negative work, leading to the decrease of turbine efficiency;

- inability of the effective use of the blades positions, when it is leeward.

One of the related counterparts is - "Horizontal wind turbine" (SU 5186 Al, F 03D 3/04, 30.04.1928(2)), a barrel, consisting of hoops with 8 pair of blades minimum attached aslant- inward and outward.

The disadvantage of this turbine is that maximum three pairs of blades simultaneously do positive work. The leeward position of the blades doesn't work. Inward and outward blades in each pair are parts of the one composite blade with inward working area and when it is aslant the efficiency decreases, because air stream will be taken to slant of the blades side, producing some work on rotating the turbine. One more counterpart is— «Vertical wind turbine of hybrid type» (PCT/IB2010/001827), that is rotor, consisting of two sets of twisted blades: inward, Savonius blade, and outward,

Darrieus blades. Each Savonius blade correspond to Darrieus blade. This turbine enables to reduce the number of positions, in which blades do negative work, but complex sections of the blades complicate and raise the price of its manufacture. There is also some difference in the efficiency of the blades - on high-speed rotation Savonius turbine would produce braking effect.

The suggested invention, twin-blade turbine, would permit to reduce the price of manufacture, at the expense of common elements usage, and increase the efficiency using the kinetic power of the wind by the increased number of blade positions, that produce positive work.

The core of the invention is illustrated in the drafts, where on fig.l you can see the twin-blade design, fig. 2 - the scheme of wind -power influence on the blades at different turbine positions during its rotation.

The technical result is achieved by the fact that twin-blade turbine (fig.l) represent a wind generator turbine with vertical axis or rotation, consisting of stretched blades, making torgue, located evenly in circle equally remoted from the turbine shaf . Longitudinal axes of the blades are parallel to each other. Each blade has certain angle of turn round its own long axis for creating an angle of attack of the coming wind. Blades are attached to the turbine shaft 1 by fittings, which can have different design. Each main turbine blade 2 is supplied by similar additional blade 3, located between the main blade and the turbine shaft, spaced from the main blade minimum on 30% of its width, and turned round its longitudinal axis, parallel to the main blade axis, on the angle, approximately equal to the angle of the main blade turn, but in specular reflection.

This turbine construction permits the usage of some positions of the blades, which were not used earlier, for example leeward positions (fig. 2), and considerable area between twin blades will allow the wind to go through without surplus pressure and resistance to the rotation of the turbine.

Claims

Claim

Wind generator turbine with vertical axis of rotation, consisting of stretched blades, with parallel longitudinal axes, located evenly in circle equally remoted from the turbine shaft, each one turned on the same angle round its own longitudinal axis and fittings, connecting blades with the shaft, differing by the fact that each main blade is supplied by similar additional blade, located between the main blade and the turbine shaft, spaced from the main blade minimum on 30% of its width, and turned round its longitudinal axis, parallel to the main blade axis, on the angle, approximately equal to the angle of the main blade turn, but in specular reflection.