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Pelton who invented it in 1880,also called a free-jet turbine or Pelton wheel, a type of Impulse turbine, named after L. A.Water passes through nozzles and strikes spoon-shaped buckets or cups arranged on the periphery of a runner, which causes the runner to rotate, producing mechanical energy. The runner is fixed on a shaft, and the rotational motion of the turbine is transmitted by the shaft to a generator. The nozzle and runner of Pelton Hydro Turbine is on the same plane, the jet direction is tangent line of runner circumference. Water from penstock is transformed into high-speed water column to inject bucket of runner, rotate the runner and work. The main shaft rotates the generator to generate electricity. The runner is above the water, excavation due to cavitation is unnecessary; the cavitation friction is less than other type turbines. The efficiency under partial load is higher. It needn't draft tube, spiral case and complex distributor, the construction is simple, maintenance and management is convenient. The deflector can extend the closing time of needle, increase the water hammer effective. It is favorable for power plant with high water head and long diversion steel pipe. Its operation is reliable and no damage to the environment.
Pelton Turbine Nozzle Mouth
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