PRESENTATION NAME - Sultan Ageng Tirtayasa...

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ELEMEN MESIN 3 Dhimas Satria

Teknik Mesin UNTIRTA

ELEMEN MESIN

PEMINDAH DAYA / POWER TRANSMISSION

SAMBUNGAN / JOINT

PEGAS / SPRING

PUTARAN TETAP PUTARAN BERUBAH

COUPLING CLUTCH GEAR BELT CHAIN

SPUR GEAR

HELICAL GEAR

BEVEL GEAR

WORM GEAR

KELING / RIVET

LAS / WELD

BAUT - MUR / BOLT - NUT

BEARING / BANTALAN

POROS / SHAFT JOURNAL BEARING

ROLL BEARING

THRUST BEARING

BALL BEARING

TAPERED BEARING

HELICAL SPRING

LEAF SPRING

RIGID COUPLING

FLEXIBLE COUPLING

BRAKE

Definition

Gears are mechanical components that

function transmitting power and motion

between axis.

Gear can also change the direction of

rotation and changing the rotational motion

into linear motion.

Gear is a component of the machinery that

is used in various industries such as:

automotive industries, coal industry plants,

steel plants industry, paper industry, etc.

Gear is usually used with two basic

objectives:

1. Raise or lower the rotational speed

2. Raise or lower the power (power) or

torque (torque)

Application of Gear System Classification

Gears

Parallel Axes Intersecting

Axes

Nonparallel,

Nonintersecting

Spur

Helical

Screw

Hypoid

Worm

Straight

Bevel

Spiral Bevel

Zerol Bevel Herringbone

Parallel Axes Gear Intersecting Axes Gear

Nonparallel, nonintersecting Axes Gear

Parallel Axes Gear:

Spur gear

Spur gear set Rack Internal gear

Spur gear cylindrical gear with straight and parallel to the axis

Is the most widely used form

Variations of the spur gear is the pinion, rack and internal gear Properly used with low to medium speeds

Parallel Axes Gear:

Spur gear nomenclature

Kalpakjian • Schmid; Manufacturing Engineering

and Technology, Prentice Hall

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Pitch circle

Maginary circle which by the action of the play, will

give the same motion on gears. Pitch circle of the

circle is called the pitch diameter. Gears size is

usually specified by a pitch circle diameter

Pitch point

Point of contact between the two pitch circles

Pitch surface

Rolling surface, the contact

Addendum

Radial distance from the pitch circle to the tooth top

gear

Parallel Axes Gear:

Helical gear

Right Hand Helical gear Left Hand Helical gear

Helical gear used if efficiency and quieter operation is

important (usually widely used in the automobile)

Helix angle between 7-23 degree The resulting large power and high speed

Helix angle should be the same for the gear pair

Intersecting Axes Gear:

Bevel gear

Straight Bevel gear Spiral Bevel gear

Bevel gear has a conical shape. Straight bevel gear-shaped

teeth straight, while Spiral Bevel helical gear.

Zero Bevel gear is a special form of a spiral bevel gear, wherein the spiral angle of zero and has the characteristics

of Straight and Spiral Bevel gear.

Used to change the direction of rotation

Nonparallel, nonintersecting Axes Gear:

Screw gear

Screw gear is a helical gear used to connect

nonparallel shaft, nonintersecting. Called also

Crossed Helical gear

Screw gear quit and smooth operation, even so is

not suitable for transmitting high power.

Source Online

AGMA (American Gear Manufacturers Association)

http://www.agma.org

http://www.howstuffworks.com

Design and Analysis of Machine Elements

http://www.mech.uwa.edu.au/DANotes

Basic Design of Gears

Will be discussed on the basis of the design of the gear

set global nature generally applicable to all types of gears.

Groove gear design is the design flow of Niemann

method. Groove design is discussed both globally and

detail.

Design Concept Gear

An understanding of the methods of designing gear will

not be done well if the students are less familiar with the

failures that occurred on gears is as follows:

Tooth Breakage

The occurrence of tooth fractures due to weak force is

main gear legs. The design is based on the strength of the

tooth foot fatigue strength (fatigue strength) of the

material. This is due to the load acting on the tooth contact

in the form of dynamic load.

Pitting

The occurrence of pitting or rupture of the tooth surface is

due to the lack of durability of the tooth surface. This

occurs because the work load is in the form of shock

loads of clashes between the two surfaces of the teeth.

Design Concept Gear

Scoring

The scoring or damage to the tooth surface is generally

due to improper lubricant selection

Flowchart Designing Gears

In this section the design flow chart for a given

spur gear and helical gear. This diagram is very important

as well as a reference for further design of the gears are

bevel gears and hypoid gear. Before studying the design

diagram is given, students should have a grasp on the

geometry of the gear will be designed

http://www.agma.org/



http://www.howstuffworks.com/



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Flowchart Designing Gears

The given Diagram is designing spur gear/helical gear

globally that are displayed in a large font. To learn, we

recommend that students must understand the meaning of

the notation used for the design of gears as given below.

The good reference table, graph and equations used all

textbook Machine Element works of Gustav Niemann

Volume II.

List of Notation For Designing Gears List of Notation For Designing Gears

Designing Spur Gear or Helical Gear The estimation of gear wheel The analysis spur gear and helical gear

Flowchart Analysis Of Spur And Helical Gear

Input data;

1. Additional Dimensions

2. Nominal Load Intensity

3. The iniquity of the teeth


Input data;

4. The ratio of contact effective


Input data;

5. A factor of stress feet teeth ( qw ) and the pressure contact

a surface (yw)

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Input data;

6. Load factor Cs, CD, CT Dan Cβ


Input data;

7. The intensity of the load of effective B W

8. Stress effective the foot of the teeth 𝝈𝑾

9. Pressure contact the surface of the teeth kW

10. Captlvity scoring the surface of the teeth


Input data;

11. Safety Factor against a broken tired feet tooth SB

12. Safety Factor Against Pitting Failure SG

13. Safety Factor Against Scoring SF

Design to Spur And Helical Gear

This will discuss it special about design spur gear and

Helical gear, that started from process supply data to

design until on the outcome of the design process of

a pair of gears

A list of notation for Spur And Helical Gear A list of notation for Spur And Helical Gear

A list of notation for Spur And Helical Gear Detail Alur Estimasi Roda Gigi Detail Alur Estimasi Roda Gigi

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Detail Alur Estimasi Roda Gigi Detail Alur Estimasi Roda Gigi Detail Alur Estimasi Roda Gigi



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Detail Alur Estimasi Roda Gigi

Detail Alur Analisis Roda Gigi





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PRESENTATION NAME - Sultan Ageng Tirtayasa...

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