Mechanical / Fluid Power Training
Hands-On Industrial Hydraulics
(printable outline)
This program has been designed to give you a broad understanding of the most common and important hydraulic components, principles and concepts. Using top quality presentation materials and simulation, you will be trained by a field experienced, Lewellyn Technology instructor. Upon completion of this program you will have a solid knowledge of all common hydraulic components, the functions they perform in a hydraulic system, and how they interact with other components in the system to get the job you want, done. As the program progresses, the more complex components involved in hydraulic systems will be discussed. You will learn about a variety of pumps, valves and actuators, and how to control them to perform the work you desire. You will learn about proper flow and sizing of hydraulic components, as well as tips you can use for troubleshooting problems in your system. Proper maintenance of hydraulic fluids and system components will also be discussed.
Program Topics:
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Hydraulic Principles
- Energy
- Inertia
- Pressure
- Force
- Flow
- Horse Power
Hydraulic Symbols
Two Common Misconceptions
Pumps
- Non-positive displacement
- Positive displacement, principal of operation
- Common fixed positive displacement pumps
Gear
Vane
Piston
Cylinders, Single and Double Acting
- Effect of differential area on force and speed
Need for Pressure Control
- Direct acting pressurerelief valves
- Direct acting pressurereducing
Speed Control Valves
- Simple flow control valves
>Direct Acting Directional Control
- Valves
- Two way, three way
- Four way,twoand three position
- Common valve actuators
Check Valves
Accumulators
- Types
- Applications
- Safety considerations
- Simplified accumulator sizing
Hydraulic Pumps
- Efficiency, volumetric & overall
- Variable volume pumps
- Pressure compensation
- Selecting motor to drive a pump
- Effect of driver speed
- Horse power requirement
Actuators
- Hydraulic motors
- 2:1 Cylinders
- Pressure intensification
- Regeneration
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Pressure and Temperature
- Compensated Flow Control
- Valves
Placement of Flow Control Valves in a Circuit
- Meter in
- Meter out
- Bypass
- Priority
Pilot Operated Directional Control Valves
Pilot Operated Check Valves
Pressure and Load Control
- Unloading valves
- Accumulator circuit
- Hi-Lo circuit
- Sequence valves
- Counterbalance valves
- Over center valves
- Accumulator dischargeunloaing valve
- Need for, and operation of, pilot operated pressure controls
Causes & Effects of High Pump Inlet Vacuum and Suction Leaks
- Cavitation
- Pseudo-cavitation
- Other causes of air entrainment
Fluid Conductors and Conductor Sizing
Fluid Conditioning
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