Efficient multistage middle-hollow mixed-flow type integrated hydro-generator

Abstract

The invention discloses an efficient multistage middle-hollow mixed-flow type integrated hydro-generator which comprises a first stator mechanism, a second stator mechanism, a first rotor mechanism, a second rotor mechanism and a rotating wheel mechanism, wherein the rotating wheel mechanism comprises a first rotary inner cover, a second rotary inner cover and a fixed outer cover that are connected through a sealed bearing to form a closed annular cavity; a first rotary impeller and a second rotary impeller are mounted on the inner sides of the first rotary inner cover and the second rotary inner cover; the first stator mechanism and the first rotor mechanism are mounted pairwise at the upper part in the annular cavity; and the second stator mechanism and the second rotor mechanism are mounted pairwise at the lower part in the annular cavity. The efficient multistage middle-hollow mixed-flow type integrated hydro-generator is high in excitation efficiency, long in service life, low in construction cost and production management cost, and high in water power conversion efficiency.

Description

Technical field [0001] The invention relates to the field of hydropower equipment, and in particular to a high-efficiency multi-stage mid-pass Francis integrated water turbine generator. Background technique [0002] According to the working principle, hydraulic turbine power generation devices can be divided into two categories: impulse turbine and counterattack turbine. The runner of the impulse turbine rotates under the impact of the water flow. During the working process, the pressure of the water flow does not change, mainly due to the conversion of kinetic energy; the runner of the impact turbine rotates in the water by the reaction force of the water flow, and the pressure of the water flow during the working process Both energy and kinetic energy have changed, but mainly the conversion of pressure energy. [0003] The impulse turbine, because its working wheels only partially pass the water and part of the bucket is stressed, so the required flow of this type of turbine is...

AI Technical Summary

Problems solved by technology

[0007] The technical problems to be solved by the present invention are as follows: 1) The transmission shaft and bearing in the existing hydroelectric power generation device have relatively large losses due to the large force and high temperature generated by friction; 2) the generator of the existing hydroelectric power generation device Exciters and exciters will generate a lot of waste heat during work, and a special cooling system needs to be installed, and the cooling effect of the cooling system is not good, and it is easy to burn the core; 3) The high stable efficiency of the existing water turbine is only about 90%; 4) The existing hydro-generators are all customized machines for different terrains, and there are large differences in volume, so they cannot be mass-produced; High strength requirements

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