Straight-blade vertical axis water turbine

Abstract

The invention aims to provide a straight-blade vertical axis water turbine. A spindle is a hollow shaft mounted on a turbine body. A high-speed pinion, an output gear and a wheel box are fixedly connected to the spindle. The output gear and a generator gear cooperate to transmit torque to a generator. The high-speed pinion matches with a gear in a gearbox. The gearbox employs two-stage speed control. A reversing worm gear is fixedly connected with the gearbox. A worm is controlled through a servo motor. An output shaft of the gearbox is a middle shaft; the middle shaft penetrates the spindle and is fixedly connected with a drive gear. The drive gear in the wheel box matches with a plurality of evenly-arranged blade gears. A blade shaft penetrates the wheel box and is fixedly connected with the blade gears and blades. A blade support is fixedly connected with the wheel box for supporting. After the wheel box rotates by one circle, the blades rotate by half circle around the blade shaft. The straight-blade vertical axis water turbine is capable of operating at low flow speed, utilization rate of energy is increased, incident flow direction is changed through the reversing worm inside; when the flow direction changes, the water turbine can still operate normally.

Description

technical field [0001] The invention relates to a power generating device, specifically a hydroelectric power generating device. Background technique [0002] At present, tidal energy turbines are mainly divided into vertical axis turbines and horizontal axis turbines. Vertical axis turbines can be divided into straight blade type, spiral blade type and external shroud type according to the shape of their blades, and can be divided into lift type turbines and resistance type turbines according to the source of driving force, according to the adjustability of the blade angle of attack. It is divided into fixed angle of attack type and variable angle of attack type. The structure of fixed angle of attack turbine is simple and convenient to manufacture, but the energy utilization rate is not high, and the energy utilization rate of variable angle of attack type turbine is relatively high. Traditional vertical-axis turbines mainly rely on lift to provide driving force, so the c...

AI Technical Summary

Problems solved by technology

Traditional vertical-axis turbines mainly rely on lift to provide driving force, so the capacity utilization rate is very low, and the requirements for start-up flow velocity are also high. Horizontal-axis turbines have certain requirements for water flow velocity and require complex reversing devices to change the entire The upstream direction of the turbine

[0003] The “Kobold” straight-blade vertical-axis turbine manufactured by Italy’s Ponte di Archimede S.P.A (PDA) company built a floating power station in Mexico in 2005 and was successfully connected to the grid. However, because the blades of the turbine cannot change the angle of attack, and Only the lift is used to provide power, so the efficiency is relatively low, only about 0.23

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