Integrated annular assembling efficient excitation mixed-flow type hydraulic generator

Abstract

The invention discloses an integrated annular assembling efficient excitation mixed-flow type hydraulic generator which comprises a first armature mechanism, a second armature mechanism, an excitation mechanism, a sealing cover mechanism, a draft tube, a guide vane mechanism, a turning wheel and a volute. The volute, the guide vane mechanism, the turning wheel and the draft tube sequentially form a water flow channel; the sealing cover mechanism comprises a rotary cover and a fixed cover; the rotary cover and the fixed cover are coaxially connected through a sealing bearing to form a closed annular cavity; the first armature mechanism, the excitation mechanism and the second armature mechanism are sequentially and coaxially installed inside the annular cavity in parallel in an inner, middle and outer layer mode; the excitation mechanism is installed in the middle in the rotary cover; the first armature mechanism is installed on the inner-diameter side in the fixed cover; and the second armature mechanism is installed on the outer-diameter side inside the fixed cover. The integrated annular assembling efficient excitation mixed-flow type hydraulic generator is long in service life, low in building cost and production and management cost, high in excitation efficiency and high in water energy conversion efficiency.

Description

Technical field [0001] The invention relates to the field of hydropower equipment, and in particular to an integrated ring-mounted high-efficiency excitation mixed-flow hydroelectric 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 this type of turbine requires a small...

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Problems solved by technology

[0006] 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; 6) The excitation efficiency of the excitation winding is low

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