Instruments and Equipments

Working principle and design, construction, calibration, analysis, performance and application of instruments and equipments.

Centrifugal pump impeller

The design of the turbine depends on the requirements of the pressure, flow

and application. The impeller is a primary element of the set

pump performance. Pump variants are often created by changing only

impeller.
In radial impeller, is a significant difference between the input

diameter and the diameter of the exit and the exit diameter

and width of output, which is the height of the channel output wheel. In

this construction, the result of the centrifugal forces of high and low pressure

the flow. The relatively low pressure and high flow, on the contrary, can be found

axial fan does not change the title and the opening width large.

Semi-axial impellers are used to compromise the increased pressure and flow

is required.

The turbine has a number of blades of the turbine. The number depends mainly on

the desired performance and noise limits and the amount and

size of solid particles in the liquid. Scooters with channels from 50 to 10 has been shown

give the best performance and is used for the liquid without solid particles. One, two

or three-wheel channels are used for fluids with particles such as sewage.

The leading edge of the propeller is designed to minimize the risk

particles block the wheel. One, two and three channels wheels can

the handle of a certain size of the particles through the impeller. Figure 1.7

shows a pump of a channel.

Impellers without the shroud is called open impellers. Open impellers

is used when you need to clean the impeller, and where there is a risk

blockage. Vortex pump with open impeller used in applications of wastewater treatment.

This type of pump, the impeller creates a flow similar

vortices in a tornado, see Figure 1.8. The vortex pump has a low efficiency

compared to pumps with a shroud and seal the turbine.

Once the basic shape of the impeller has been decided, the planning

turbine is a matter of finding a compromise between the friction losses and losses

concequence because it is not uniform velocity profiles. In general, a uniform velocity

profiles can be obtained by extending blades, but this means

increased friction wall.

Labels: CP impeller
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      • How to troubleshoot centrifugal pump myself
      • Coupling and Drive of a standard Centrifugal Pump
      • Centrifugal pump impeller
      • Hydraulic components of centrifugal pump
      • Everything about Centrifugal Pump
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