1.4 Pumps

Question 1

What do pumps do?

Answer 1

Create flow. Not pressure.

Question 2

How is pump performance measured?

Answer 2

Flow rate
Pressure
Speed

Question 3

Pumps in Parallel increase ____

Answer 3

Flow

Question 4

Pumps in series increase ____

Answer 4

Pressure

Question 5

Positive Displacement vs. Non-positive Displacement pumps

Answer 5

Positive Displacements will discharge the same volume of fluid they intake.

Non-positive displacement pumps will not. They will have somewhere to discharge excess.

Question 6

What type of pump?

Answer 6

Positive Displacement: Gear Pump

Question 7

What type of pump?

Answer 7

Positive Displacement: Gerorotor Pump

Question 8

What type of pump?

Answer 8

Positive Displacement: Vane Pump

Question 9

What type of pump?

Answer 9

Positive Displacement: Axial Piston Pump

Question 10

What type of pump?

Answer 10

Positive Displacement: Radial Piston Pump

Question 11

Explain Cavitation

Answer 11

When the pressure drops below the vapour pressure, gas bubbles form then collapse violently. This collapse can create impacts on components and lead to wear.

Question 12

Explain Aeration

Answer 12

Air bubbles introduced into the system due to leaks may collapse and cause wear on components.

Question 13

What is Hydrostatic Transmission

Answer 13

Transmission of power to components.