PURPOSE: A rotary reflection/injection-type turbine using the vaporization force and pressure of high-temperature and high-pressure water is provided to increase thermal efficiency by completely using thermal energy and pressure energy as rotary power with expanding, accelerating, decompressing, and cooling the water by the explosive vaporization force and pressure of the water injected from a plurality of rotary reflection/injection-type nozzles. CONSTITUTION: In a rotary reflection/injection-type turbine including a plurality of diffusion-type nozzles(5) for explosively vaporizing and rotatively reflecting and injecting high-temperature and high-pressure water from the center of a disc-shaped rotary plate(3), a rotary shaft(10) of the turbine inserted and fixed to the center of the turbine disc is rotatively inserted into bearings(13,14,15) fixed to a bearing fixing unit(17). A pair of worm gears(11,12) is inserted and fixed to a power shaft and the rotary shaft to decelerate high-speed rotation and make each demanded part use power. The worm gears and bearings are submerged under the lubricating oil of a turbine lubricating system chamber(9) to wear and lubricate the bearings and the worm gears rotating at high speed.
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