Double-impeller hydraulic turbine

Abstract

The invention discloses a double-impeller hydraulic turbine, and belongs to the technical field of fluid machinery. The hydraulic turbine comprises a frame, an upper transverse plate, a main transmission mechanism, an upper convection arm, an upper bearing seat, an output shaft, a first impeller mechanism, a second impeller mechanism, a lower transverse plate, a lower convection arm and a lower bearing seat; the first impeller mechanism and the second impeller mechanism are mounted between the upper and lower transverse plates, two impellers can rotate around a rotation shaft respectively under the action of fluid, but are opposite in rotation direction, and the reverse torques of the two impeller rotation shafts are output to an output shaft in the same direction through the main transmission mechanism; the upper and lower convection arms are fixedly connected with the upper and lower transverse plates respectively, and the impellers and the main transmission mechanism are mounted onthe frame through the upper and lower bearing seats to realize the yaw of the hydraulic turbine. The double-impeller hydraulic turbine provided by the invention organically combines the lift-drag characteristics of blades, and has the advantages of excellent self-starting performance, high conversion efficiency, flexible arrangement, environmental friendliness, low site selection requirements, wide application range and the like; the double-impeller hydraulic turbine can be applied to most sea areas and inland rivers, and has broad application prospects in water resource development.

Description

Technical field: [0001] The invention belongs to the technical field of fluid machinery, and in particular relates to a water turbine with double impellers. Background technique: [0002] As a green renewable energy with abundant reserves, high energy flow density and strong predictability, the development and utilization of water resources has always attracted much attention. At present, the development of water resources is mainly oriented to two aspects. One is to dam inland rivers and lakes to increase the water head, and to convert the potential energy of water into mechanical energy through water turbines, and then further into usable electrical energy. However, the amount of engineering is large, the cost is high, and the damage to the environment is relatively large. The second is the comprehensive development and utilization of marine energy, mainly including tidal energy, wave energy, ocean current energy, seawater temperature difference energy and salinity differ...

AI Technical Summary

Problems solved by technology

However, there are still some technical problems in the current hydraulic turbines used for tidal current energy generation. For example, the starting flow rate generally exceeds 0.7m / s, and the rated power flow rate generally exceeds 2m / s. , has relatively large limitations, and is not suitable for promotion to ordinary sea areas with low tidal current velocity, and cannot maximize the development of tidal current energy resources, resulting in a large waste of energy

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