Horizontal type annular efficient excitation adjustable-pitch axial flow hydraulic generator and acting method

Abstract

The invention discloses a horizontal type annular efficient excitation adjustable-pitch axial flow hydraulic generator and an acting method. The horizontal type annular efficient excitation adjustable-pitch axial flow hydraulic generator comprises a power generating mechanism, an excitation mechanism, a runner mechanism, an exhaust water pipe, a water guiding mechanism and a runner chamber. The runner mechanism comprises rotary blades, an annular rotary cover and an annular fixed cover. The rotary blades are distributed on the inner side of the annular rotary cover in a fan-shaped mode. The annular rotary cover and the annular fixed cover are connected through a sealing bearing to form a sealed annular cavity. The power generating mechanism and the excitation mechanism are coaxially installed in the annular cavity in a front-back mode side by side. A sealed water flow channel is formed by the water guiding mechanism, the runner chamber and the exhaust water pipe. The horizontal type annular efficient excitation adjustable-pitch axial flow hydraulic generator is long in service life, low in construction cost and production management cost and high in hydraulic energy conversion efficiency.

Description

technical field [0001] The invention relates to the field of hydropower equipment, in particular to a horizontal ring-mounted high-efficiency excitation rotary paddle axial-flow hydroelectric generator and a work method thereof. 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 t...

AI Technical Summary

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, which cannot be mass-produced; High strength requirements; 6) The magnetic pole excitation efficiency of the field winding is low

Images