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INVENTION
Patent of the Russian Federation RU2182258
ROTOR OF TYPE OF SAVONIUS
The name of the inventor: Solovyev A.P.
The name of the patent holder: Naval Academy named after Admiral of the Fleet of the Soviet Union N.G. Kuznetsova
Address for correspondence: 197045, St. Petersburg, Ushakovskaya nab., 17/1, VMA them. Admiral N.G. Kuznetsova, deputy. On educational and scientific work NDZakorin
The effective date of the patent: 1994.12.27
The invention relates to wind energy and relates to Savonius-type rotors used in wind and hydraulic engines. SUMMARY OF THE INVENTION: The rotor comprises two blades, each consisting of a cylindrical part with a front thickened edge and a flat plate connected to the trailing edge of the cylindrical part of the blade along a tangent to it. The thickening of the leading edge is made in the form of a wing profile with a sucking surface on the outer side of the blade, and on the side of the free end of the flat plate there is an aerodynamic profile of the segment type with a back to the center of rotation of the rotor.
DESCRIPTION OF THE INVENTION
The invention relates to wind energy and relates to Savonius-type rotors used in wind and hydraulic engines. Allows to increase the coefficient of use of wind energy (water flow), the power of the rotor.
The Savonius rotor is known, containing two blades in the form of half-cylinders, located parallel to the axis of rotation of the rotor [1]. Its disadvantage is a small (about 20%) coefficient of energy use of the oncoming flow and low power of the rotor of the specified dimensions.
For the prototype we choose a rotor of the Savonius type [as. USSR 46491, M.kl. F 03 D 3/06, pub. 1936]. It contains two blades consisting of a cylindrical part with a front thickened edge and a flat plate connected to the trailing edge of the cylindrical part tangentially to it. The disadvantage of the prototype is a small coefficient of utilization of the energy of the flow, in particular when moving it between parallel flat parts of the blades. The center of the flow passes through the axis of rotation and has a small shoulder relative to this axis, hence a small additional torque.
To increase the energy efficiency of the flow and power of the rotor with the same dimensions in the existing Savonius-type rotor containing two blades consisting of a cylindrical part with a front thickened edge and a flat plate connected to the trailing edge of the cylindrical part of the blade tangentially to it, a thickening of the leading edge of the cylindrical Part is made in the form of a wing profile with a suction surface on the outer side of the blade, and on the side of the free end of the flat plate is placed a hydrodynamic profile of the segment type with a back to the center of rotation of the rotor.
The proposed device differs from the prototype in that
- the thickening of the leading edge of the cylindrical part of the blade is made in the form of a wing profile, while its suction surface is located on the outside of the blade;
- Aerohydrodynamic profile is installed on the free end of the flat plate, for example a segment type, the back of which is facing the center of rotation of the rotor.
We can assume that the proposed device has elements of significant novelty.
From close analogs we consider [2]. The difference is constructive. In the analogue, the free end of the flat plate is bent towards the center of rotation of the rotor (Figure 1) in such a way as to direct the flow passing between the flat plates to the second blade from the rear side. In the application from the free end of the plate there is a profile, for example a segment type, due to which, as the flow between the plates passes, an additional torque is created and the velocity of the flow acting on the back side of the second blade increases. There are no other similar analogues.
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The proposed Savonius-type rotor in the form of a cross-section is shown in the drawing. The rotor comprises two cylindrical blades 1 consisting of a cylindrical part 2 and a plate 3, a wing profile 4 at the leading edge of the blade and a profile (for example, a segment type) 5 on the free end of the plate 3. The device works as follows. When the flow is exerted on the concave part of the blade 1, a lifting force arises on the wing profile 4, which creates a torque relative to the center of the rotor 0. In addition, due to the drag of the wing, this torque can be substantially increased. To do this, it is necessary to select the appropriate profile, which simultaneously would give a great lift and had a lot of resistance. For this, the injection side of the profile can be made with an artificial roughness. As the flow between the plates 3 passes through the backs of the profiles 5, a vacuum appears; There will be lifting forces that will create additional torque. Profile 5, unlike profile 4, should have the least resistance to flow. At the same time, the injection side of the profiles 5 can have great resistance, for example, by applying a roughness. The final effect of the invention depends on the optimal design of the profile selection rotor, the distance between the plates 3, the length of the plates, |
It should be expected that the energy utilization factor of the proposed device will be higher than that of the prototype by at least 30-50%. The device is industrially applicable, easy to manufacture.
INFORMATION SOURCES
1. Shefter Ya. I., Rozhdestvensky I.V. The inventor of windmills and wind turbines. -M .: Izd. C / x, 1957, c.19.
2. German Patent No. 3,519,700, F 03 D 3/00, pub. 1986
CLAIM
A Savonius-type rotor comprising two blades consisting of a cylindrical part with a front thickened edge and a flat plate connected to the trailing edge of the cylindrical part of the blade tangentially to it, characterized in that the leading edge thickening is made in the form of a wing profile with a suction surface on the outside And from the free end of the flat plate a hydrodynamic profile of the segmental type with a back to the center of rotation of the rotor is placed.
print version
Publication date 31.01.2007gg
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