Machine Parts

1.       Meter quantity of fuel as per speed and loads. 2.       Distribute the metered fuel equally among the cylinders. 3.       Inject the fuel as the correct time in the cycle. 4.       Inject the fuel at the correct rate. 5.       Inject the fuel with required spray pattern and atomization demand by the combustion chamber. 6.       Begin and end injection sharply without dribbling of after injection. To   fullfill the all requirement the injection system consist of  1.       Pumping elements. 2.       Metering elements. 3.       Metering controls. 4.       Distribution element. 5.       Timing control.

  With maximum efficiency a centrifugal pump generally work. Centrifugal pump perform in various way when the pump is run at different condition at different conditions from it’s design conditions. The pump under various conditions to symbol of   the behavior such as speed, tests, powers, discharges, heads are usually conducted. If we plot this result of a characteristics of a pump in graph paper we find a curve which is called characteristics curve. About the performance of a pump in it’s installation these curve provide important information. For centrifugal pump one can make various types of characteristics curve such  as 1.       Constant discharge curve 2.         Constant head curves 3.       Main characteristics curve 4.       Constants efficiency curves 5.       Operating characteristics curve 6.       Muschel curves                              Merits of Centrifygal Pump   Classification of Centrifugal Pump    

  For high heads and small discharges the reciprocating pumps are still employed of higher efficiency. High pressure can be build up by a reciprocating pump. It also be used for lifting oil from very deep oil wells. 1.       Output from the pump is uniform 2.       On the power source the torque is uniform 3.       Centrifugal pump cost is lower then it parts 4.       Capability of discharge is greater than of a reciprocating pump 5.       It can be employed for lighting highly viscous liquid such as paper pulp, muddy and sewage water, oil, sugar and molasses etc. 6.       Maintenance and installation is cheaper and easier. 7.       It is hands and compact is smaller size and weight for same capacity for the energy transfer. 8.       An oil engine or an electric motor it can be coupled directly. 9.       Characteristics are superior of it’s performance 10.   Without any danger cavitation and separation it can be operated very high speed.  

  On the Basis of Transfer of mechanical energy the pumps can be broadly classify as follows: a.       Rotodynamic pumps: 1.       Radial Flow Pumps 2.       Axial Flow pumps 3.       Mixed Flow pumps b.       Positive displacement pumps: In rotodynamic pumps increase in energy level is due to combination of centrifugal energy, pressure energy and kinetic energy. o. The energy transfer in a radial flow pump, occurs mainly when the flow is in it’s radial path. o . In a axial flow pump, the energy transfer occurs when the flow is in it’s axial direction. o . The energy transfer in a mixed   flow pump takes place when the flow compromises radial as well as axial components. The radial flow types pump are commonly called centrifugal pump.   Mian parts of a centrifugal pump: a.        Delivery Pipe b.       Casing c.        Impeller d.       Suction Pipe   What is basic difference between a Turbine and The Pump?