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Centrifugal pump construction and working.
Centrifugal pump consist of the following parts 1)Inlet and outlet pipe 2)Casing 3)Impeller 4) Vanes. Working principle of Centrifugal pump: Centrifugal pump creates an increase in pressure by transfer of mechanical energy from the electrical motor to the fluid through the rotating impeller. Inlet and outlet pipe.- One end of the inlet pipe is dipped in to the fluid fitted with a strainar and other end is connected to the casing. Similaraly one end of oulet pipe connected to casing and other to the discharge tub. Casing: Casing is the outermost part of the centrifugal pump. cross sectional area of the pump is goes on increasing along the sdischarge side.casing is generally made up of a stell or cast iron. Impeller- Impeller is the rotating part of the pump.which have vanes for pushing fluids in the casing.sometimes there will be guide vanes are also provided to guide the flow.Impeller is situated in the casing. Working: Suction pipe suck the water...
Types of mechanical instruments
Types of mechanical instruments 1)Active and passive instrument. The instrument which require external power for manipulation and measurement is generally known as a active instrument. eg.potentiometer. The instrument which does not require external power for manipulation and measurement is generally known as a Passive instrument. eg. Liquid level measurement using fload and gear arrangement 2)Analog and digital instrument: The analog instrument in which the output can have an infinite number of values within the range that the instrument is designed to measure.eg.voltmeter The analog instrument in which the output can have an finite number of values within the range that the instrument is designed to measure. eg .electronic speedmeter 3)Null type and deflection type instruments: In the deflection type instrument quantity being measure displayed in terms of the amount of Pointers deflection Eg.pressure gauge. In null type instrument measurement is done...