Double-shaft film swing type water turbine

Abstract

The invention discloses a double-shaft film swing type water turbine. A fixed rectangular blade support is used for installing a film blade structure, the number of additional blades of a unit water turbine structure can be increased, and meanwhile the film blades can be stressed on three water surfaces to push transmission shafts to rotate in the same direction; and the film blades at the rear sides of the rectangular blade bracket facing the water flow direction can form a certain flow guide phenomenon, reverse torque generated on a reverse water surface is reduced, the whole water turbine has a higher energy utilization coefficient, meanwhile, S-shaped resistance blades are installed on the transmission shafts, the overall performance and the self-starting performance are further improved, and existence of dead corners of the water turbine can be avoided. A rectangular frame is used in cooperation with a film material, the hysteresis effect generated by inertia of the blades in the rigid swing type blade design can be reduced, meanwhile, the blade cavitation effect generated by sudden pressure change is avoided at the tails of the blades, and the service life of the blades is prolonged.

Description

technical field [0001] The invention belongs to the technical field of ocean energy power generation, and in particular relates to a biaxial membrane swing type water turbine. Background technique [0002] With the rapid development of urban modernization and industrialization, energy has already become an important factor affecting the rapid economic and social development. Commonly used traditional energy such as coal, oil, natural gas and other fossil fuels cannot be regenerated in a short period of time, and will cause damage to the natural environment while being consumed. For the sustainable development of the environment, it is imminent to develop alternative energy sources. [0003] As a new type of green renewable energy, ocean energy mainly includes tidal energy, tidal current energy and wave energy. my country has a long coastline and vast sea area, and has abundant ocean energy reserves. It is one of the areas with the highest power density of tidal current ene...

AI Technical Summary

Problems solved by technology

However, most of the existing vertical axis turbines use the circular rotation of the blades to convert the ocean current energy into mechanical energy. According to the existing research results, the main power generation area is the windward side, but the windward side accounts for a larger proportion of the circular rotation. Low, combined with the existence of a large interception area to generate resistance or no power, resulting in overall low efficiency

[0004] Some of the existing technologies use swingable blades to increase the power generated by the blades in the resistance zone or reactive power zone, while the swingable blades used in the prior art have hysteresis due to inertia, or require additional mechanical The structure or automatic control device controls the swing of the blades, which complicates the structure and reduces the overall efficiency

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