It is a diagram which shows the pressure head in the cylinder corresponding to any position during the suction and delivery strokes. the effects if inertia pressure and friction on the performance of the pump can conveniently be shown by plotting this diagram.
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Steam indicators are more often used on engines than pumps, because most pumps retain full admission of steam throughout their stroke (approximately 90% of the stroke) and the steam does not get expanded by the cutoff of the admission valves. Thus, the diagram from the indicator would resemble two slightly deformed rectangles and is typically not a usable diagram.
Engine diagrams are used to determine the horsepower and efficiency of the steam engine, where the area traced divided by the length of stroke will yield the MEP (mean effective pressure) of the steam for the HP formula [ PLAN/33000] where P = MEP, LA = the engine constant {length of stroke times cross-sectional area of cylinder}, and N = strokes per minute.
For Duplex, triplex and simplex pumps the MEP = the admission steam pressure for this reason. For double acting pumps and engines both the head end and crank end must be calculated and combined.
HP = PLAN + PLA'N / 33000 where LA' = the crank end engine (or pump) constant. [ with area A' (subtract the cross-sectional area of the piston rod).]
it runs without fluctuation i.r continuous flow......
As the reciprocating pump operates though the reciprocation of the follower,it guides the suction and the compression of water in the pipe.That's so when the rotary motion of the rotor blade is converted into the reciprocating motion, which deliver it to the reciprocating pump, the suction and discharge takes place.
When the actual flow (Qa) is greater than theoretical flow (Qt) in a reciprocating pump it is negetive slip.
momentum.
A foot valve is not required in reciprocating pumps because these pumps can create suction and effectively draw fluid into the pump chamber during their intake stroke. Unlike centrifugal pumps, which rely on continuous flow and need a foot valve to maintain prime, reciprocating pumps can handle intermittent flow and are designed to operate with a positive pressure during the suction phase. Additionally, the check valves within the pump ensure that fluid flows in the desired direction and prevents backflow, eliminating the need for an external foot valve.
ts diagram of reciprocating air comprssior
we can pump water in high current
it runs without fluctuation i.r continuous flow......
A reciprocating pump is an advantageous pump. Centrifugal pumps convert energy into rotation to power themselves. A reciprocating pump uses a back and forth linear motion.
As the reciprocating pump operates though the reciprocation of the follower,it guides the suction and the compression of water in the pipe.That's so when the rotary motion of the rotor blade is converted into the reciprocating motion, which deliver it to the reciprocating pump, the suction and discharge takes place.
When the actual flow (Qa) is greater than theoretical flow (Qt) in a reciprocating pump it is negetive slip.
stall
air vessel are use in reciprocating pump for to damped out the pressure variation during discharg so it is not fiteed on discahrg pipe the high pressure damp the pump
momentum.
N.P Burgh has written: 'The indicator diagram practically considered' 'The indicator diagram'
Yes. However in some application we can use a rotary type.
to maintain speed of the pump without sepration......call me on 8439332784