Device and method for suction pipe
AssigneeTroms Kraft Produksjon AS
InventorMorten Kjeldsen
Life of this patent
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Abstract
A method and device for reducing noise and vibrations in a suction pipe (1) in a reaction-type hydropower turbine. The suction pipe (1) comprises one or more nozzles (2) for injection of a working medium through the nozzles (2) into the suction pipe (1). Each nozzle is arranged at an angle γ relative to a horizontal plane perpendicular to the longitudinal axis (4) of an inlet (3) of the suction pipe (1) and at an angle β relative to a horizontally defined tangent (6) at the point of intersection between each nozzle (2) and the suction pipe (1).
Claims22
A device for reducing noise and vibrations in a suction pipe in a reaction-type hydropower turbine at low operating ranges, where the suction pipe comprises at least one nozzle for injection of a water through the nozzles into the suction pipe, where each nozzle is arranged at an angle γ between 5° and 80° relative to a horizontal plane perpendicular to the longitudinal axis of an inlet of the suction pipe,
- wherein -each nozzle is at an angle β between 20° and 70° relative to a horizontally defined tangent at the point of intersection between each nozzle and the suction pipe;
- wherein an amount of water injected is zero at the optimal operating point for the turbine, while for lower operating points the amount of water injected will increase to 10% of the amount of water passing the turbine at the operating point concerned.
A method for reducing noise and vibrations in a suction pipe in a reaction-type hydropower turbine at low operating ranges,
- wherein it comprises the following step:
- a) injection of a water through at least one nozzle provided in the suction pipe, where each nozzle is arranged at an angle γ between 5° and 80° relative to a horizontal plane perpendicular to the longitudinal axis of an inlet in the suction pipe and at an angle β between 20° and 70° relative to a horizontally defined tangent at the point of intersection between each nozzle and the suction pipe;
- wherein an amount of water injected is zero at the optimal operating point for the turbine, while for lower operating points the amount of water injected will increase to 10% of the amount of water passing the turbine at the operating point concerned.
Dependencies are inferred from the claim text.