Machine Parts

Purposes of Engine cooling system: The purpose of the cooling system is to keep the engine at its most efficient operating temperature at all engine speeds and all driving conditions. Temperatures higher than this will cause the lubricating oil film to break down and lose its lubricating properties.                                                   Figure: Engine Water Cooling System Types of engine cooling system: There are two types of engine cooling system 1.       Air cooling system 2.       Liquid cooling system                                                    Figure: Engine Air Cooling System Most of the engine used liquid cooling such as car, motorcycles, airplanes and so on. 

  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?