HYDRAULIC SYSTEM *Characteristic *Components *Applications *Advantages & Disadvantages *Basic Circuit & Explanation

1. JF-505 INDUSTRIAL ROBOTICS
LACTURER : ABDUL RAHMAN BIN MOHAMMAD
Muhammad Azrizal Bin Abd Rashid
Mohammad Taufik Bin Shafian
Muneer Martadza
03 BTP 11 F 2011
03 BPT 11 F 2007
03 BTP 11 F 2004

2. HYDRAULIC SYSTEM
 Characteristic
 Components
 Applications
 Advantages & Disadvantages
 Basic Circuit & Explanation

3. CHARACTERISTIC
 Wear Resistance
 Oxidation Stability
 Compressibility
 Foam Resistance

4. WEAR RESISTANCE
 Wear resistance is a hydraulic fluid's ability to reduce
the wear rate in frictional boundary contacts.
 Anti wear hydraulic fluids contain anti wear
components that can form a protective film on metal
surfaces to prevent abrasion, scuffing, and contact
fatigue.
 Antiwear additives enhance lubricant performance and
extend equipment life.

5. OXIDATION STABILITY
 Oxidation stability is a hydraulic oil's resistance to heat-
induced degradation caused by a chemical reaction
with oxygen.
 Hydraulic oils must contain additives that counteract
the process of oxidation, improve the stability and
extend the life of the fluid.
 Without these additives, the quality of the hydraulic
oil will deteriorate quickly.

6. COMPRESSIBILITY
 Compressibility is a measure of the amount of volume
reduction due to pressure.
 Although hydraulic oils are basically incompressible, slight
volume reductions can occur under certain pressure
ranges.
 Compressibility increases with pressure and temperature
and has significant effects on high-pressure fluid systems.
 It causes servo failure, efficiency loss, and cavitation;
therefore, it is important for a hydraulic oil to have low
compressibility.

7. FOAM RESISTANCE
 Foam results from air or other gases becoming entrained
in the hydraulic fluid. Air enters a hydraulic system through
the reservoir or through air leaks within the system.
 A hydraulic fluid under high pressure can contain a large
volume of dissolved or dispersed air bubbles. When this
fluid is depressurized, the air bubbles expand and produce
foam.
 Proper foam inhibitors modify the surface tension on air
bubbles so they more easily break up.

8. COMPONENTS
 Directional Control Valve
 Motor
 Pump
 Filter
 Cylinder
 Tank

9. DIRECTIONAL CONTROL VALVE
 To control a direction of hydraulic fluids.

10. MOTOR & PUMP
 To energize the pump.
 To distribute the fluid to system.

11. FILTER
 To separate moisture in fluids.

12. CYLINDER
 As a working medium.

13. ACCUMULATOR
 To store the power, absorb fluid fluctuation & stabilize
system pressure.

14. TANK
 To store the cooling down the fluids.

15. APPLICATIONS
 Metal forming machinery
 Conveyor systems
 Foundries & primary metals plants
 Presses, including cushions, clutches & brakes
 Automated assembly systems
 Packaging systems
 Grinding & honing applications
 Plastic injection & blow moulding
 R & D test facilities
 Plant central systems
 Material handling & robotic systems

16. ADVANTAGES & DISADVANTAGES
 Advantages:
 Flexibility
 Multiplication of Force
 Simplicity
 Compact
 Economy
 Safety
 Disadvantages:
 Efficiency
 Cleanliness

17. BASIC CIRCUIT & EXPLANATION
 The animations show the
sequences in a basic
hydraulic circuit in simplified
form - the actuation and
spring return of the final
control element (4/2-way
valve), the advance and
return of the drive
component (double acting
cylinder) and the opening
and closing of the pressure
relief valve.