Important: Use custom search function to get better results from our thousands of pages

Use " " for compulsory search eg:"electronics seminar" , use -" " for filter something eg: "electronics seminar" -"/tag/" (used for exclude results from tag pages)
Ask More Info Of  A Seminar Ask More Info Of A Project Post Reply  Follow us on Twitter
28-07-2012, 12:58 PM
Post: #1
ppt on CENTRIFUGAL PUMPS
CENTRIFUGAL PUMPS


.doc  Centrifugal pump.doc (Size: 191 KB / Downloads: 116)

Introduction

A centrifugal pump is a rotodynamic pump that uses a rotating impeller to create flow by the addition of energy to a fluid. Centrifugal pumps are commonly used to move liquids through piping. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits into the downstream piping. Centrifugal pumps are used for large discharge through smaller heads.
According to Reti, the Brazilian soldier and historian of science, the first machine that could be characterized as a centrifugal pump was a mud lifting machine which appeared as early as 1475 in a treatise by the Italian Renaissance engineer Francesco di Giorgio Martini. True centrifugal pumps were not developed until the late 17th century, when Denis Papin made one with straight vanes. The curved vane was introduced by British inventor John Appold in 1851.

Design

The overwhelming majority of contractor pumps use centrifugal force to move water. Centrifugal force is defined as the action that causes something, in this case water, to move away from its center of rotation.
All centrifugal pumps use an impeller and volute to create the partial vacuum and discharge pressure necessary to move water through the casing. The impeller and volute form the heart of the pump and help determine its flow, pressure and solid handling capability.
An impeller is a rotating disk with a set of vanes coupled to the engine/motor shaft that produces centrifugal force within the pump casing. A volute is the stationary housing (in which the impeller rotates) that collects, discharges and re-circulates water entering the pump.
A diffuser is used on high pressure pumps and is similar to a volute but more compact in design. Many types of material can be used in their manufacture but cast iron is most commonly used for construction applications.
In order for a centrifugal pump, or self priming, pump to attain its initial prime the casing must first be manually primed or filled with water. Afterwards, unless it is run dry or drained, a sufficient amount of water should remain in the pump to ensure quick priming the next time it is needed.

Working

A centrifugal pump converts the input power to kinetic energy in the liquid by accelerating the liquid by a revolving device - an impeller. The most common type is the volute pump. Fluid enters the pump through the eye of the impeller which rotates at high speed. The fluid is accelerated radially outward from the pump chasing. A vacuum is created at the impellers eye that continuously draws more fluid into the pump.The energy created by the pump is kinetic energy according the Bernoulli Equation. The energy transferred to the liquid corresponds to the velocity at the edge or vane tip of the impeller. The faster the impeller revolves or the bigger the impeller is, the higher will the velocity of the liquid energy transferred to the liquid be. This is described by the Affinity Laws.

Priming

Most centrifugal pumps are not self-priming. In other words, the pump casing must be filled with liquid before the pump is started, or the pump will not be able to function. If the pump casing becomes filled with vapors or gases, the pump impeller becomes gas-bound and incapable of pumping. To ensure that a centrifugal pump remains primed and does not become gas-bound, most centrifugal pumps are located below the level of the source from which the pump is to take its suction. The same effect can be gained by supplying liquid to the pump suction under pressure supplied by another pump placed in the suction line.
Rating ppt on CENTRIFUGAL PUMPS Options
Share ppt on CENTRIFUGAL PUMPS To Your Friends :- Seminar Topics Bookmark
Post Reply 

Marked Categories : pumps, role of pressure in centrifugal pump ppt, ppt file of application of centrifugal pump, seminar for centrifugal pump, introduction on centrifugal pumpm in ppt, ppt 0n centrifugal pump, centrifugal pump seminer topic, seminar ppt for pump, ppt on centrifugal, pump impeller material ppt, centrifugal pump ppt seminar, ppt centrifugal pump, the impellers in pumps ppt, design and analysis of centrifugal pump ppt, centrifugal pump, ppt on centrifugal pumps, volute casing ppt, design centrifugal pump water ppt, ppt for centrifugal pumps, centrifugal pump report project ppt, centrifugal pump doc, centrifugal pump ppt, how construction vane impeller ppt, ppt on pumps,

[-]
Quick Reply
Message
Type your reply to this message here.


Image Verification
Image Verification
(case insensitive)
Please enter the text within the image on the left in to the text box below. This process is used to prevent automated posts.

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Hydraulic pumps and pressure regulation pdf seminar post 0 148 17-05-2014 11:55 AM
Last Post: seminar post
  Performance of Centrifugal Pumps seminar tips 2 2,431 26-07-2013 10:25 AM
Last Post: study tips
  Diesel distributor fuel-injection pumps pdf study tips 0 417 05-07-2013 02:38 PM
Last Post: study tips
  Series UP2 Gear Pumps for Water & Engine Oil pdf study tips 0 407 15-06-2013 03:14 PM
Last Post: study tips
  Frame-Mounted Centrifugal Pumps study tips 0 285 05-06-2013 12:55 PM
Last Post: study tips
  Design and Performance Analysis of Centrifugal Pump study tips 0 677 14-05-2013 04:48 PM
Last Post: study tips
  Diesel distributor fuel-injection pumps pdf project girl 0 459 07-02-2013 03:25 PM
Last Post: project girl
  PERFORMANCE TEST ON CENTRIFUGAL PUMP project girl 0 671 03-01-2013 10:42 AM
Last Post: project girl
  ppt on Hydraulic Pumps project girl 0 1,053 28-12-2012 06:49 PM
Last Post: project girl
  Different types of pumps seminar tips 0 465 09-11-2012 06:06 PM
Last Post: seminar tips
This Page May Contain What is ppt on CENTRIFUGAL PUMPS And Latest Information/News About ppt on CENTRIFUGAL PUMPS ,If Not ...Use Search to get more info about ppt on CENTRIFUGAL PUMPS Or Ask Here

Options: