Hydraulic machines are the machines that transfer energy between its operating parts and a fluid.
Examples:
Classification
Section titled “Classification”Based on energy transfer direction
Section titled “Based on energy transfer direction”Machine to Fluid
Section titled “Machine to Fluid”Examples:
- Pumps (for liquids)
- Blowers, Compressors (for gases)
Fluid to Machine
Section titled “Fluid to Machine”Examples:
- Turbines
- Fluid motors
Energy transfer using fluid
Section titled “Energy transfer using fluid”Examples:
- Hydraulic Jack
Based on principle of operation
Section titled “Based on principle of operation”Positive displacement
Section titled “Positive displacement”Fluid taken into an enclosed space and forced out by repeated mechanical action.
Examples:
- Piston pump
- Rotary pump
Rotodynamic
Section titled “Rotodynamic”Main component is a rotating element. It rotates inside a fluid. Rotating element’s kinetic energy is transferred to fluid when the fluid flows through it.
| Machine | Main rotating element |
|---|---|
| Pumps | Impeller |
| Turbines | Runner |
| Fans/Blowers | Rotor |
Summary
Section titled “Summary”| Machine to Fluid | Fluid to Machine | Energy transfer using fluid | |
|---|---|---|---|
| Positive Displacement | Piston pump, Rotary pump | Motors | Hydraulic Ram, Jack Press |
| Rotodynamic | Pumps, Compressors | Turbines | Hydraulic coupling, Torque converter |