Construction and Working of Pelton Wheel Impulse Turbine

Construction and Working of Impulse Turbine Pelton Wheel Points : Construction and Working of Pelton Wheel Impulse Turbine, Pelton Wheel (Free jet Turbine) Pelton wheel is high head, horizontal shaft, peripheral flow, impulse turbine. It needs moderately less amount of water. It is especially intended buckets are consistently spaced with fixed around the edge of runner. Runner is hold on a horizontal shaft with is housed in a casing. Nozzle is fixed at end of penstock. It is give by a spear rod. Hand wheel is fixed to spear rod so as to respond it to get a preferred size jet of water. Water is conveying to turbine during penstock with nozzle to type a free jet of water. Nozzle is reserved very close to bucket to minimize the losses due to windage. Moreover jet is so familiar that it is peripheral to pitch circle of runner. Jet of water at elevated velocity impinges the bucket. It might be noted that just a only some buckets will be strike by jet at a time. While a result the runner turn, supplying power to shaft. After performing work on buckets water release freely in to tail race. Brake nozzle is use to hold up speed of runner rapidly to rest, by help of a direct water jet above back of buckets. In arrange to derive additional power, larger size runners by multiple nozzles are use. The amount of nozzles is depending on definite speed. Two nozzles by a horizontal shaft four or six nozzles by a vertical shaft are admired designs.