Runner with bucket: – runner of Pelton wheel consists of a circular disc on Governing mechanism: – speed of turbine runner is required to be. This speed should also conforms to the power supply frequency. So this mechanism acts as a speed governing mechanism of Pelton wheel. Presentation on:Governing of Pelton WheelTurbine pump with oil sump Relay or control valve Servomotor with spear rod and spear Deflector mechanism.
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The area under flow-duration curve represents the total quantity of run-off during the period. The governing achieved by changing the guide vane angles.
We think you have liked this presentation. The sleeve of the governor is connected through linkages to relay valve.
Presentation on:Governing of Pelton WheelTurbine
No suction downside, water flows out through turbine housing after hitting. The deflector diverts a portion of the water jet away from the runner buckets. About project SlidePlayer Terms of Service. Each bucket reverses the flow of water and this impulse spins the turbine. The water stream hits each bucket on the runner.
Vertical bell shaped draft tube: Auth with social network: When the load on the turbine changes, the speed may also change, i. The deflector is brought to its original position by means of cam arrangement. My presentations Profile Feedback Log out.
This is done by controlling the quantity of water flowing on the runner according to the load variations. Oil under pressure is forced from the control valve to the right side of the piston in the servomotor, 6. The characteristics of turbines are obtained under three different categories-‘ a Main characteristics Head constant b Operating characteristics Speed constant c Muschel curves Efficiency constant A.
Governing of Pelton WheelTurbine”— Presentation transcript: It will simultaneously more the spear valve to the left and increase the area of flow through the nozzle.
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It receives oil from relay valve say through pipe A. Total volume of discharge upto any time, given by the area under the curve upto the mecganism.
Sleeve moves upward, 3. Published by Mervyn Oliver Modified over 2 years ago.
As a result the sleeve of the governor will move downwards. It is also called as control valve or distributor. Proportional or directional valves controlled by the governor operate cylinders that open turbkne close wicket gates or needle valves to adjust the flow of water to the turbine in order to maintain a constant turbine speed.
In this case, the head is kept constant and the speed is varied by varying the load on the turbine. The rapid closing of the nozzle increases the pressure of water which may result in water hammer problems.
Presentation on:Governing of Pelton WheelTurbine – ppt video online download
Runaway speed is the speed at which the turbine exceeds its designed maximum rotational speed. Guide vanes direct the water tangentially to the runner. To make this website work, we log user data and share it with processors. Registration Forgot your password? Centrifugal governor Oil pump-gear pump with oil sump Relay or control valve Servomotor with spear rod and spear Deflector mechanism. Such plants are called the Run-off river plants without pondage.