GOVERNING MECHANISM OF PELTON TURBINE PDF
February 11, 2021 | by admin
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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It prevents the flow.
Governing of Pelton Turbine.doc
Governing of Pelton WheelTurbine. This sudden rise of pressure in penstock known as water hammering. In other words it is study of hydrological cycle, in which the water rises by evaporation from sea, is carried over land, where it falls as precipitation and then rises again by evaporation or transpiration or flows back to sea. The behaviour of the units are represented by curves called turbine characteristics.
No control on flow of water. Left hand end of main lever rises, 4.
Registration Forgot your password? Runaway speed is the speed at which the turbine exceeds its designed maximum rotational speed. Thus, it is essential that the exact behavior of the unit under varying working conditions is predetermined.
Hydropower Engineering – ppt video online download
The speed-efficiency curves for turbines are similar to speedpower curves. Thank you for interesting in our services. There may be some natural depression or saddle on the periphery of the reservoir basin away from the dam.
Speed vs efficiency curve: It can be seen by this mechanism, the linear motion of servomotor piston is converted into rotary motion of regulating ring.
Function of oil pump is to pressurize the oil. The maximum and minimum run-off during period. Please help us to share our service with your friends. In this case, the head governihg kept constant and the speed is varied by varying the load on the turbine.
Presentation on:Governing of Pelton WheelTurbine – ppt video online download
Availability of water Water storage Water head Distance from load centre Accessibility of site Water pollution Sedimentation Large catchment area Availability of land. Governiny area under flow-duration curve represents the total quantity of run-off during the period. The crest of spillway is kept at full reservoir level. It is a double acting cylinder which acts as hydraulic actuator. It store water when load is light and supplied same water during peak period.
Surge tank is built just before the valve house so that the severity of governihg hammering is reduced.
Centrifugal governor Oil pump-gear pump with oil sump Relay or control valve Servomotor with spear rod and spear Deflector mechanism.
Space between guide vanes will increase in one direction of rotation of regulating ring and space will decrease in its opposite direction of rotation. The sleeve of the turbiine is connected through linkages to relay valve.
It is curve which indicates the total volume of run-off in m3 upto a certain time. About project SlidePlayer Terms of Service.
Size px x x x x The water turbines are simple in construction, highly efficient in operation, easily controllable govrening pick up the load in a short time. Thus, turbiine closure of the nozzle opening is eliminated and at the same time the quantity of water striking the runner is reduced. Vertical bell shaped draft tube: Download ppt “Hydropower Engineering”. Auth with social network: 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.
The largest units can be up to MW. The average run-off during the period. It is driven by the turbine shaft through bevel gears. Download ppt “Presentation on: Hydroelectric turbines rotate at relatively low speeds compared to steam turbines, with larger hydroelectric turbines rotating at rpm, and smaller ones as fast as rpm.