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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My presentations Profile Feedback Log out. The crest of spillway is kept at full reservoir level.
Furthermore, if this oscillation exceeds the maximum allowable frequency, then the turbine must be shut down, resulting in temporary loss of generating production. Vertical bell shaped draft tube: Can be used as base or peak load plants. Working The centrifugal governor actuator is driven by the turbine shaft through a belt or gear.
Presentation on:Governing of Pelton WheelTurbine – ppt video online download
For this reason, the system requires an oil sump to store the oil and an oil pump to regulate the oil supply in the mechanism. Water is directed tangentially, through the mcehanism, and spirals on to a propeller shaped runner, causing it to spin.
These type of plants are suitable as peak load plants at locations furbine there is a storage of water since these plants are designed such that it pumps back portion of its water supply from tail race to head race during non- peak periods. Thus, it is essential that the exact behavior of the unit under varying working conditions is predetermined.
The maximum and minimum run-off during period.
Please help us to share our service with your friends. Centrifugal governor Oil pump-gear pump with oil sump Relay or control valve Servomotor with spear rod and spear Deflector mechanism. The behaviour of the units are represented by curves called turbine characteristics.
It will simultaneously more the spear valve to the left and increase the area of flow through the nozzle. If rainfall is uniform throughout the year, the mass curve would be straight line with uniform slope.
Governing of Pelton WheelTurbine. A centrifugal governor is used as the measuring element of the closed loop control system.
System uses oil in servomotor or relay cylinder since the force required to actuate the spear valve would be enormous. Please fill this form, we will try to respond as soon as possible. Thank you eplton interesting in our services. Hydrograph provides following information: It is defined as that part of the precipitation which is available as stream flow. The oil in the right side is returned to the oil sump. It is driven by the turbine shaft through bevel gears.
Storage and pondage is available. Share buttons are a little bit lower.
Governing of Pelton – Free Download PDF
Due to turning of guide vanes the space between two consecutive guide vanes would change. High head, low flow applications. Once the normal turbine speed is restored, the main lever returns to its initial position. Pelton wheel, Cross Flow e. Simultaneously, the oil will be returned from the servomotor from the opposite pipe to the sump. Governing of Pelton WheelTurbine”— Presentation transcript: 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.
Hence, the speed of the runner must be maintained constant to have a constant speed of generator. We need your help to maintenance this website. Please copy and paste pleton embed script to where you want to embed Embed Script.
Download ppt “Hydropower Engineering”. We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. The piston of the turbins will be displaced towards left, thus forcing the oil through the pipe B into the relay valve and finally to oil sump.
Governing of Pelton Turbine.doc
Thus, rapid closure of the nozzle opening is eliminated and at the same time the quantity of water striking the runner is reduced. Penstock Valves and Gates. Such plants are called the Run-off river plants without pondage.