EQUIPMENT FOR ELIMINATING INSTABILITIES GENERATED BY WHIRL FLOWING FROM DRAFT TUBE CONE OF HYDRAULIC TURBINES
The invention refers to an equipment for eliminating the instabilities generated by whirl flowing from the draft tube cone of hydraulic turbines, especially fixed-blades turbines, such as the Francis turbine. According to the invention, the equipment proposes to place two components at the exit from...
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Zusammenfassung: | The invention refers to an equipment for eliminating the instabilities generated by whirl flowing from the draft tube cone of hydraulic turbines, especially fixed-blades turbines, such as the Francis turbine. According to the invention, the equipment proposes to place two components at the exit from the turbine rotor and at the entry into a draft tube cone (9) of the turbine, coaxial with a rotor (4) and towards the exit therefrom, namely an additional rotor (1) with a free rotation movement, on a shaft (2), integral with the rotor (4), the additional rotor (1) rotating freely under the action of the water flow passing through it, and the main element of the invention, the additional rotor (1) with a free rotation movement in the draft tube cone (9), can eliminate the vortex rope, the pressure fluctuations and the vibrations associated thereto, which are very harmful for the hydraulic turbine.
Invenţia se referă la un echipament pentru eliminarea instabilităţilor generate de curgerea cu vârtej din difuzorul conic al turbinelor hidraulice, în special cele cu palete fixe precum turbina Francis. Echipamentul, conform invenţiei, propune amplasarea la ieşirea din rotorul turbinei şi intrarea într-un difuzor (9) conic al turbinei, coaxial cu un rotor (4) şi înspre ieşirea din aceasta a două componente, un rotor (1) suplimentar cu mişcare liberă de rotaţie, pe un arbore (2), solidar cu rotorul (4), rotorul (1) suplimentar învârtindu-se liber sub acţiunea debitului de apă care îl străbate, iar elementul principal al invenţiei, rotorul (1) suplimentar cu mişcare liberă de rotaţie în difuzorul (9) conic, poate elimina vârtejul funie, fluctuaţiile de presiune şi vibraţiile asociate acestuia, efecte foarte dăunătoare turbinei hidraulice . |
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