Birotor level loading efficient excitation mixed flow hydraulic generator

Abstract

The invention discloses a birotor level loading efficient excitation mixed flow hydraulic generator. The birotor level loading efficient excitation mixed flow hydraulic generator comprises a first armature mechanism, a second armature mechanism, an excitation mechanism, a seal cover body mechanism, a draft tube, a guide vane mechanism, a first runner, a second runner and a volute. The volute, the guide vane mechanism, the first runner, the second runner and the draft tube forms a water flow channel sequentially. The seal cover body mechanism comprises a first rotary cover and a second rotary cover. The first rotary cover and the second rotary cover are coaxially connected through a seal bearing to form a closed annular cavity and are located on the inner layer and the outer layer correspondingly. The first armature mechanism, the excitation mechanism and the second armature mechanism installed in the annular cavity sequentially coaxially in parallel in an upper-middle-lower-layer mode. The excitation mechanism is installed in the middle in the first rotary cover. The first armature mechanism is installed on the upper portion of the second rotary cover. The second armature mechanism is installed on the lower portion of the second rotary cover. The birotor level loading efficient excitation mixed flow hydraulic generator is long in 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, in particular to a flat-mounted double-rotor high-efficiency excitation mixed-flow hydroelectric generator. Background technique [0002] According to the working principle, hydroelectric power generation devices can be divided into two categories: impact turbines and impact turbines. The runner of the impact turbine is impacted by the water flow and rotates, and the pressure of the water flow remains unchanged during the working process, mainly due to the conversion of kinetic energy; the runner of the impact turbine is rotated by the reaction force of the water flow, and the pressure of the water flow during the working process Both energy and kinetic energy are changed, but mainly the conversion of pressure energy. [0003] Pelton turbines, because only part of the working wheels pass through the water, and part of the water bucket is under force, so the required flow of this type of turbi...

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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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