Lifting force type vertical shaft water turbine

Abstract

The invention discloses a lifting force type vertical shaft water turbine. The lifting force type vertical shaft water turbine comprises an impeller, wherein the impeller is composed of an impeller shaft and two or more lifting force type blades arranged on the impeller shaft, and two ends of a wind wheel shaft can fix the blades on the impeller shaft through a round flat plate. The lifting force type vertical shaft water turbine is characterized in that the impeller is arranged in an annular guide cover, the lower end of the annular guide cover is provided with a fluid outlet, and an inlet of the guide cover is also connected with an acceleration flow channel; an outlet of the flow channel is provided with a guide plate, the guide plate is tangent to concentric circles with centers positioned on the impeller shaft, and the distance from the guide plate to the impeller shaft is greater than the distance from the lifting force type blades to the impeller shaft; under the common guidance of the guide plate and the guide cover, the water flow is uniformly distributed by surrounding rotating circles of the blades; and under the action of the guide blades, the blade impeller rotating towards vertical flow direction has high efficiency, and the lifting force type vertical shaft water turbine is suitable for lower-water-head hydroelectric generation and tidal current energy generation water turbines.

Description

technical field [0001] The invention relates to the technology and equipment of a novel ocean current energy or low water level water turbine. Background technique [0002] At present, most water turbines use the pressure of high water head to do work, and the efficiency of this type of water turbine is higher when the water level is high. However, for low water head or even some micro-head power generation rivers without dams, if traditional hydraulic turbines that rely on pressure to do work are used to convert energy, the efficiency is low and the economy is poor. In such micro-head hydroelectric power generation, there are horizontal-axis turbines and vertical-axis lift type turbines. These turbines have their own advantages and disadvantages. For horizontal axis turbines, the wheels of horizontal axis turbines use lift-type blades, which have fast speed, high energy utilization rate, and relatively mature technology, so they are widely used. However, there is a yaw lo...

AI Technical Summary

Problems solved by technology

However, there is a yaw loss in the horizontal axis turbine, which will cause a large deviation between the actual efficiency and the theoretical efficiency of the actual operating turbine.

However, although the traditional lift type vertical shaft turbine does not have the problem of directional adaptability, the characteristics of its blades absorbing work twice make it exist. The problem of weak work ability

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