Presented by:

Luu Cam Tuyen

Nguyen Thi Ngoc Bich

Bui Dieu Linh

Providing a basic understanding of

structure and working mechanism of

centrifugal pumps

Suggesting some usage tips

Structure1

Operation 2

Usage tips3

Mud lifting or water lifting type of machine

Designed base on centrifugal force

Used to transport the fluid in different systems

Impeller

Sealing ring

Pump

Bearing

Shaft

Stuffing box

Impeller

- Key part of the centrifugal pump

- Core component: high speed and output power

- Internal & external surface: smooth

→ reduce friction loss

Impeller classification

+ mechanical structure

Impeller

ClosedSemi-closed Open

+ fluid absorption

impeller

Single suction

Double suction

Pump- The main pump- Supporting the impeller& reducing the kinetic energyof the fluid→ discharged at the outlet of the matter

Bearing- Set on the support shaft component- 2 kinds

+ rolling bearings+ sliding bearings

Sealing ring (leakage reduction ring)

- Reduce the internal leakage resistance

- Delay the impeller and pump casing

Stuffing box

- Close the gap between the shell and the shaft

- Maintain the vacuum inside the pump

Pump shaft

- Connect to motor function

- Major component of mechanical energy transfer

Structure1

Operation 2

Usage tips3

Generation of Centrifugal Force

Conversion of Kinetic Energy to PressureEnergy

- Generation of centrifugal force

* Centrifugal force

A force which makes things move away from the centre of something when they are moving around it.

* Centrifugal force

movement of liquid from

center to the edge of the

impellers.

+ Water enters the nozzle ->

impeller’s eye

+ Impeller rotates -> liquid

spinning outward

+ Liquid leaves the impeller’s

eye-> low pressure area ->

more liquid

Generation of Centrifugal Force

Conversion of Kinetic Energy to PressureEnergy

- Conversion of Kinetic

Energy to Pressure Energy:

+ Centrifugal force creates

kinetic energy

=> kinetic energy is

obstructed by creating

resistance in flow (volute

casing-resistance)

+ Liquid slows down

->Kinetic energy is

converted to pressure

energy

How does liquid flow inside the pump?

Structure1

Operation 2

Usage tips3

Use an eccentric reducer

Use pressure gauges

Avoid running pump in reverse direction

Do not let the pump run dry

Structure1

Operation 2

Usage tips3

http://www5.briggsandstratton.com/eu/en/lawn_care_safety/safety/water_pumps.aspx

http://www.engineersedge.com/pumps/centrifugal_pump.htm

http://www.pumpfundamentals.com/centrifugal-pump-tips.htm