Introduction to pumps pdf

Pump casing wearing ring. Centrifugal pumps basically consist of a stationary pump casing and an impeller mounted on a rotating shaft. The pump casing provides a pressure boundary for the pump and contains channels to properly direct the suction and discharge flow.

Principally, pump converts mechanical energy of motor into fluid flow energy. As depicted in Figure (left), they evolved in Persia to take the form of a Figure 1: Left: Ancient Persian water wheel. A centrifugal pump has two main components: I.

A rotating component comprised of an impeller and a shaft II. A stationary component comprised of a casing, casing cover, and bearings. The general components, both stationary and rotary, are depicted in Figure B. Multistage pump : Several impellers are mounted on the same shaft. DThe flowrate is the same through all stages.

DEach stage develops an additional pressure rise. DFor a very large discharge pressure. A pump system uses two basic types of control valves: on-off valves and modulating valves.

A pump can be controlled in the simplest way with stop or start relays and manually operated suction and discharge block valves.

The block valves are either closed or opened. At first glance understanding hydraulic pumps can seem like a daunting task. The quickest way to get up to speeds is to survey the landscape and gain an understanding of the most fundamental topics of centrifugal pump design, application, and selection. Flow from a region or low pressure to one of high pressure.

INTRODUCTION The development of mechanical pumps was intimately linked with the progress of vacuum science up to the middle of this century when the introduction of both the sputter ion pump and the sublimation pump provided an alternate method for the production of low pressure. A PRACTICAL INTRODUCTION TO SOLAR WATER PUMPING For locations without power lines, solar pumps offer a clean and simple alternative to fuel-burning engines, generators and wind turbines, for domestic water, livestock and irrigation. They pump the most during the driest sunny weather.

They require no fuel deliveries, and very little maintenance. Velocity diagrams at the inlet and exit of a centrifugal pump impeller. This brief introduction to pumping slurries considers: 1. Non-Newtonian Liquids 3. Particle size and distribution b. Mass fraction of small particles c. Concentration of Solids e. Slurry Characteristics a. Vane pumps have a rotor that spins inside a large circular or oval chamber called a cam ring.

Vane chambers increase in volume on the inlet side where they take in flui and decrease in volume on the discharge side which forces the fluid out of the pump. It can happen at low pressures and normal operating temperatures.

Locally, it in the liquid turning to a vapor and creating very high temperatures and pressures. Reservoir - acts as a storehouse for the fluid and a heat dissipater. Hydraulic Valves- control pressure, direction and flow rate of the hydraulic fluid.