Ladder-helical counter-rotating sill-type combined energy dissipation facility and energy dissipation method

Abstract

The invention discloses a step type and spiral reverse rotation bottom sill type combined energy dissipation facility and an energy dissipation method and relates to the technical field of dam flood discharge and energy dissipation. A step type and spiral reverse rotation bottom sill type combined energy dissipation facility body comprises an overflow weir, a step structure, a spiral impeller structure and a plunge pool; the step structure comprises multiple step units and is fixed on a straight line section of the overflow weir, and each step unit comprises a step curved surface, a step vertical surface and pier structures; the spiral impeller structure comprises multiple double-spiral impeller units, and each double-spiral impeller unit comprises impellers, rotating shafts, ball bearings and fixing parts; the spiral impeller structure is fixed on a reverse curve section of the overflow weir through a base. The step structure and the spiral impeller structure are assembled on the overflow weir, the energy dissipation mode of the overflow weir is improved, higher energy dissipation and erosion control efficiency and prominent engineering practical value are realized, and the application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of dam flood discharge and energy dissipation, in particular to a stepped-helical counter-rotating bottom sill type combined energy dissipation facility and an energy dissipation method. Background technique [0002] With the development of water conservancy and hydropower engineering construction, the problem of high-speed water flow in drainage structures characterized by narrow valleys, high water heads, and large flows is particularly prominent. Energy dissipation and scour prevention have always been a difficult problem to be solved in the design of water conservancy projects. In order to reduce the huge kinetic energy of the discharge water flow in the reservoir area and realize the connection between the reservoir area and the upstream and downstream water flow of the downstream river, the discharge structures need to adopt effective energy dissipation devices. Traditional energy dissipation methods i...

AI Technical Summary

Problems solved by technology

When the single-width flow rate increases and the water depth on the step surface increases, the aeration point will greatly move downstream, within a certain range at the beginning of the step, resulting in weakened energy dissipation efficiency and severe cavitation damage to the structure

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