Trade of heavy vehicle mechanic
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Water PumpFunction: The impeller pump is bolted to the front or side of the engine and is used to speed up the circulation of the water through the system. This makes possible the carrying of less volume and mass of water, the use of smaller and lighter radiator (the position of which is not critical) and the directing of the coolest water to the most heated area. Construction: The pump consists of an impeller in the form of a disc with integral tapered blades on one side. The blades may be straight or curved according to the degree of centrefugal force required and are deeper at the impeller centre. The impeller is secured to one end of a shaft carried in a prepacked and grease sealed bearing. The other end of the shaft carries the drive pully and the fan, and is driven by a vee belt from the crankshaft. The shaft assembly is mounted in a castiron or aluminium casing which also surrounds the impeller, the bearing being protected from the water by a spring loaded carbon sealing ring. The water inlet from the bottom tank of the radiator leads into the centre of the impeller and an outlet from a point at the edge of the impeller directs the water into the distributor tube in the cylinder head. 
Operation: The impeller is rotated as the engine starts and the water at its centre is impelled along the blades by the action of the centrefugal force. The water is then thrown off the edge of the impeller and directed to the outlet by the casing. The centre of the impeller (low pressure) is refilled with the water displaced from the radiator and the circulation continues for as long as the impeller is rotated. Should the thermostat valve be closed, the water leaving the pump is returned to the pump inlet through an internal or an external by-pass. Directory: Content -> APPRENTICE -> liu Content -> Resolution Content -> American bar association adopted by the house of delegates Content -> Additional File 26 Content -> Guide to completing the collection using the Omnibus system Content -> Management and Marketing Content -> Sigaccess annual Report Content -> Study Guide For Students Only Dress Rehearsal January 29, 2014 7: 00 pm jubilee Auditorium Content -> Benjamin Franklin: In Search of a Better World Section One Content -> Extended range forecast of atlantic seasonal hurricane activity and landfall strike probability for 2013 liu -> Vehicle body repair Download 1.17 Mb. Share with your friends:
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