Experiment Name: Study on different types of drives used in textile machine.
Objective:
II) Make a short report about drives.
Theory of drives: The parts of machine used to transmit motion from one component to another component then it’s called drives.
List of different types of drives:
I) Pulley & Belt
II) Gear
III) Sprocket and chain
IV) Tappet.
V) Variable drives.
I) Pulley & Belt:
A belt is a loop of flexible material used to mechanically link two rotating shafts most often parallel. Belt may be used as a source of motion to transmit power efficiently. Belts are looped over pulleys. Inn a two pulley system the belt can either drive the pulleys normally in one direction, or the belt may be crossed, so that the direction of driven shaft is reversed.
Types of pulleys and belt:
a) Flat pulley and belt.
b) V- belt
c) Timing belt.
d) Round belt.
e) Etc.
A) Flat belts and pulleys:
The flat belt is a simple system of motion transmission. It can deliver high power at high speed. But this wide belt and large pulleys required lots of space and high tension for operation.
Fig: Pulley and Belt
B) V belts:
V belts are mostly used for transmission motion. They provide the best combination of traction, high speed of movement and long service life. It solved the alignment problem but it still there is a problem called slippage.
Fig: V- Pulley and belt
C) Timing belt:
When the slippage of belt is a big matter to production there we used timing belt.
Fig: Timing Belt
D) Round belt:
Round belts are circular cross section belt designed to run a pulley with v-groove. Round groove are only suitable pulley that guide the belts.
FIG: Round Belt
II) Gear:
A gear is rotating machine parts having cut teeth which mesh with another toothed part to transmit power or motion.
Fig: Gear
Different types of gear:
I) Straight cut gears.
II) Hailed gears.
III) Bevel gears.
IV) Warm gears.
.
a) Straight cut gears:
These are simplest types of gear. They consist of a cylinder or disks with projecting radially. The each tooth is straight and align parallel to the axis of rotation.
b) Hailed gear: Hailed gear offer a refinement over straight cut gear. The leading edges of the teeth are not parallel to the axis of rotation, but are set of an angle.
c) Bevel gear: A bevel gear is shaped like right circular cone with most of its of. It stands and make 450 angle to transmit motion.
d) Tappet: A tappet is a projection that imparts a linear motion of some other component with is a mechanism.
e) Variable drive: Its slow the drives motion in time constantly.
Conclusion: Drives are important for transmit motion. Noted and draw diagram carefully.
Conclusion:………………………
