GOVERNING MECHANISM OF PELTON TURBINE PDF

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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Auth with social network: Francis, Propeller or Kaplan turbine are employed. Oil under pressure is forced from the control valve to the right side of the piston in the servomotor, 6.

When N is zero, the angular speed is zero and when N equals runaway speed, the output power is again zero. Function of oil pump is to pressurize the oil. But in practice, it operates under varying conditions because the level and quantity of water in a storage reservoir does not remain constant throughout the year, and also the load on the turbine is variable.

C engine Cylinder Piston Connecting rod. A dam is a hydraulic structure of fairly impervious material built across a river or a stream to retain the water.

Hydropower Engineering

The movement of is transferred through the lever to move the piston rod of relay valve. High head, low flow applications. It is directly connected to the piston of relay cylinder Governor and linkages: The piston of the cylinder will be displaced towards left, thus forcing the oil through the pipe B into the relay valve and finally to oil sump.

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There may be some natural depression or saddle on the periphery of the reservoir basin away from the dam. It will simultaneously more the spear valve to the left and increase the area of flow through the nozzle.

The governing mechanism is disconnected from the system so that the experiments are performed at constant gate openings. About project SlidePlayer Terms of Service. It causes the following actions to take place one after another.

The maximum and minimum run-off during period. Vertical bell shaped draft tube: Feedback Privacy Policy Feedback. It can be seen by this mechanism, the linear motion of servomotor piston is converted into rotary motion of regulating ring. These curves are used in determination of the capacity of storage reservoir. A centrifugal governor is used as the measuring element of the closed loop control system. Storage and pondage is available.

Thus, it is essential that the exact behavior of the unit under varying working conditions is predetermined. The sleeve of the governor is connected through linkages to relay valve.

It is a double acting cylinder which acts as hydraulic actuator.

Presentation on:Governing of Pelton WheelTurbine – ppt video online download

Bell crank lever moves down and simultaneously the piston of the control valve moves down in the cylinder. The backward movement of the spear increases the opening tuurbine the nozzle outlet. Pelton wheel, Cross Flow e. Can operate with heads as small as 15 meters and as high as 1, meters. If water rises above full level of reservoir govening enters into spillway and discharge. Since the governor is driven by the turbine shaft, its speed will also As a consequence, the flyballs of the governor will move inwards due to reduced centrifugal force on the balls.

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It is temporary regulating reservoir. It is double acting cylinder which acts as hydraulic actuator. Guide vanes direct the water tangentially to the runner.

The downward movement of the piston in the control valve forces oil under pressure from the control valve to the left side of the piston in the servomotor. Sleeve moves downward, 3.

Working The centrifugal governor actuator is driven by the turbine shaft through a belt or gear. Published by Mervyn Oliver Modified over 2 years ago.

When this occurs it is possible for the turbine to disintegrate due to massive centrifugal forces.

Governing of Pelton – Free Download PDF

Consequently, the rate of flow is decreased and normal speed is restored. Please help peltln to share our service with your friends.

It is the graphical representation between discharge and flow with time.