Multi-working-condition multi-stage turbine

Abstract

The invention provides a multi-working-condition multi-stage turbine. The multi-working-condition multi-stage turbine comprises a draft tube, a sectional type guide vane, an axial-flow impeller, a shell, a main shaft, centrifugal impellers, impeller rings, movable guide vanes, a balance disc, a mechanical seal, a bearing pedestal and a deep groove ball bearing. The multi-working-condition multi-stage turbine aims to improve the efficiency and the stability of the turbine under the variable working conditions. The multi-stage centrifugal impellers are suitable for recycling the energy with high energy head fluid. The movable guide vanes can play a role in flow adjustment, and can also be used for adjusting the inflow angle and reducing the inflow impact loss when the condition deviates from the designed working condition. Similarly, the sectional type guide vane is designed for adapting to different working conditions, and can effectively eliminate the circulation of water flow in the draft tube, and therefore the cavitation damage to the draft tube is greatly reduced, and the vibration of the draft tube is weakened.

Description

technical field [0001] The invention relates to a turbine device, in particular to a multi-working-condition multi-stage turbine device. Background technique [0002] A turbine is a machine that converts the energy contained in a fluid working medium into mechanical energy. There are a large number of high-pressure liquids in petrochemical, petroleum processing, chemical fertilizer, seawater desalination, iron and steel metallurgy and other industries, and the energy of these high-pressure liquids is mostly wasted at present. In foreign countries, some developed countries currently use the energy of these high-pressure liquids with special hydraulic energy recovery turbines, but in my country and some developing countries, most of the energy is wasted, and it has also been used in the fertilizer industry in China in recent years. A device that reverses the pump to recover, but due to the lack of design theory, the energy recovery efficiency is generally low, which leads to t...

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Problems solved by technology

[0006] However, the above-mentioned patents can only increase the stability of the machine when the working conditions change, but cannot improve the efficiency of the changing working conditions.

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