JF-505 INDUSTRIAL ROBOTICSLACTURER : 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

HYDRAULIC SYSTEM

Characteristic

Components

Applications

Advantages & Disadvantages

Basic Circuit & Explanation

CHARACTERISTIC

Wear Resistance

Oxidation Stability

Compressibility

Foam Resistance

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.

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.

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.

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.

COMPONENTS

Directional Control Valve

Motor

Pump

Filter

Cylinder

Tank

DIRECTIONAL CONTROL VALVE

To control a direction of hydraulic fluids.

MOTOR & PUMP

To energize the pump.

To distribute the fluid to system.

FILTER

To separate moisture in fluids.

CYLINDER

As a working medium.

ACCUMULATOR

To store the power, absorb fluid fluctuation & stabilize

system pressure.

TANK

To store the cooling down the fluids.

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

ADVANTAGES & DISADVANTAGES

Advantages:

Flexibility

Multiplication of Force

Simplicity

Compact

Economy

Safety

Disadvantages:

Efficiency

Cleanliness

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.