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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Presentation on:Governing of Pelton WheelTurbine – ppt video online download
Published by Mervyn Oliver Modified over 2 years ago. Governing of Pelton WheelTurbine. The process of providing any arrangement which will keep the speed constant and will regulate the rate of flow as per variation in load.
As turbine is directly coupled to the electric generator which is required to run at constant sped. The load on turbine is not constant through out the day or hour, hence speed of turbine varies with respect to load at constant head and discharge.
Therefore in order to have constant speed of generator ,governing of turbine is required to maintain the constant speed of turbine with respect to load. Centrifugal governor Oil pump-gear pump with oil sump Relay or control valve Servomotor with spear rod and spear Deflector mechanism.
Governing of Pelton Turbine.doc
System uses oil in servomotor or relay cylinder since the force required to actuate the spear valve would be enormous. For this reason, the system requires an oil sump to store the oil and an oil pump to regulate the oil supply in the tyrbine. Oil pump is a positive displacement type of pump like gear pump or axial piston pump. Relay valve is a spool valve having 5 ports.
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It is also called as control valve or distributor valve. It receives the pressurised oil from the oil pump which is diverted towards the ports to pipe A or pipe B. Simultaneously, the oil will be returned from the servomotor from the opposite pipe to the sump. It is a double acting cylinder which acts as hydraulic actuator.
It receives oil from relay valve say through pipe A. 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.
It will simultaneously more the spear valve to the left and increase the area of flow through the nozzle. A centrifugal governor is used as the measuring element of the closed loop control system. It is driven by the turbine shaft through bevel gears. The sleeve of the governor is connected through linkages to relay valve. The movement of is transferred through the lever to move the piston rod of relay valve. 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.
As a result the sleeve of the governor will move downwards. Transmission Hydraulic Systems Chapter 4 Introduction How the transmission develops hydraulic pressure How transmission generates, regulates and modifies. My presentations Profile Feedback Log out. Auth with social network: Registration Forgot your password? Governing of Pelton WheelTurbine”— Presentation transcript: Download ppt “Presentation turbinf Governing of Pelton WheelTurbine”.
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