Hydraulic turbine
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United States of America Patent
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Jul 27, 2021
Grant Date -
May 14, 2020
app pub date -
Nov 18, 2019
filing date -
Jul 25, 2016
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hydraulic turbine includes a rotor with a runner, which is concentrically surrounded by a stator, whereby the runner comprises a plurality of runner blades arranged and distributed in a ring around a rotor axis, and each runner blade extends between a runner crown and a runner band; whereby the stator comprises a plurality of guide vanes arranged and distributed in a ring around the rotor axis, and each guide vane extends between an upper stator ring and a lower stator ring; and whereby a predetermined clearance is provided at least between the runner band and the lower stator ring. A substantial reduction of pressure pulsations in the vane-less gap between said runner blades of said runner is achieved by substantially increasing said predetermined clearance.
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