vertical axis turbine

Abstract

The invention provides a vertical shaft water turbine. The vertical shaft water turbine comprises a rotor, an upper cover plate, a lower cover plate and an arc baffle plate, the rotor comprises a rotating shaft and a plurality of blades, and the multiple blades are fixedly arranged on the side face of the rotating shaft; the lower cover plate passes through the lower end of the rotating shaft andis arranged at the lower ends of the blades; and one end of the arc baffle plate is connected with the edge of the upper cover plate, and the other end of the arc baffle plate is connected with the edge of the lower cover plate. The arc baffle plate is installed between the upper cover plate and the lower cover plate of the vertical shaft water turbine, and the arc baffle plate and the upper coverplate and the lower cover plate form an accelerating passage due to the fixed flow direction of a water flow or an ocean current and the blocking effect, so that the speed of the water flow via the rotor of the water turbine is significantly improved, and then the acting performance of the blades of the rotor is improved and the overall output power of the water turbine is improved; and furthermore, the water turbine can achieve an energy conversion process of converting fluid kinetic energy to mechanical energy and then to electric energy more efficiently in a limited space.

Description

technical field [0001] The invention relates to the field of water turbines, in particular to a vertical axis water turbine. Background technique [0002] Water flow energy refers to the kinetic energy contained in seawater or river water in horizontal flow, which is a kind of renewable energy. Generally speaking, ocean current energy resources in rivers with a water velocity greater than 2 meters per second, in submarine waterways or straits, and in areas with regular seawater flow caused by tides are all valuable for development and utilization. Due to the similarity with the principle of wind power generation, most of the water flow power generation devices currently under development also convert the kinetic energy of flowing water into mechanical energy and then use it for power generation. Therefore, its structure is also similar to that of wind turbines, which can be divided into horizontal axis type and vertical axis type. There are two types, the vertical axis type...

AI Technical Summary

Problems solved by technology

However, the current passive method of improving blade performance by using small auxiliary structures such as ribs, cylinders, and optimized blade geometry needs to be directly installed on the surface of the rotor blade. Under certain working conditions, changing the geometric shape of the blades will increase the flow resistance and reduce the hydrodynamic characteristics of the turbine blades.

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