Page 381 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

LESSON 132 - 135: Classification of rotary Pumps-

Construction and operation
repairing procedure. Brief

description of turbine & stage

pumps, positive displacements
and their advantages

Objectives

At the end of this lesson you shall be able to
• explain about rotary pump
• demonstrate repairing procedure of rotary pump
• describe about turbine, stage pump and positive displacement pump.

Classification of rotary Pumps-Construction and operation - repairing procedure
Rotary pump: A rotary pump is a type of positive displacement purs, vanes, screws, lobes, or rollers. These
pumps trap fluid in a mp that moves fluid using rotating mechanisms such as geaconfined space and then force
it through the pump to create flow. Rotary pumps are known for their ability to handle various viscosities of fluids
and provide a steady, continuous flow. They are widely used in industries such as automotive, oil and gas,
chemical processing, and food production.

1 Gear Pumps: These pumps use interlocking gears to move fluid from the inlet to the outlet. They are simple,
reliable, and suitable for high-pressure applications.

2 Vane Pumps: Vane pumps utilize rotating vanes (blades) to push fluid through the pump. They are often used
for low to medium pressure applications and are known for their quiet operation.
3 Screw Pumps: Screw pumps use one or more screws to move fluid along the screw’s axis. They are suitable
for high-viscosity fluids and can handle abrasive materials.
4 Lobe Pumps: Lobe pumps consist of two or more lobes that rotate to create suction and discharge fluid. They
are commonly used in food processing and pharmaceutical industries due to their gentle handling of delicate
fluids.

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