gearless transmission

19
MAJOR PROJECT A presentation on GEARLESS POWER TRANSMISSION SYSTEM BY •Himanshu Singh UID: K10481

Upload: k10481

Post on 26-Jan-2017

709 views

Category:

Technology


0 download

TRANSCRIPT

Page 1: Gearless transmission

MAJOR PROJECT

A presentation onGEARLESS POWER

TRANSMISSION SYSTEM

BY•Himanshu Singh UID: K10481

Page 2: Gearless transmission

OVERVIEW

• What is gearless transmission?• Need of gearless transmission.• Applications• Comparison• Materials• Specification and manufacturing of parts.• Advantages• Limitations• Possible advances• Conclusion

Page 3: Gearless transmission

What Is Gearless Transmission?

• Also called elbow mechanism

• It is an ingenious link mechanism of slider and kinematic chain principle.

• Transmits power at any angle without utilising gears

Page 4: Gearless transmission

Need Of Gearless Transmission

• Today’s world requires speed on each and every field.• Engineers are constantly confronted to the challenges of

efficient transmission of power.• Gears are costly to manufacture.• It is needed to further increase the efficiency of transmission

which cannot be done using geared transmission• Gearless transmission mechanism is capable of transmitting

power at any angle without any gears being manufactured.

Page 5: Gearless transmission

Working Principle

• Transmits the power between two shafts whose axes are at 90 degree through bent links.

• Three links slide relatively according to the motion given to input shaft.

• Due to this, the rotational motion of input shaft is converted into sliding motion of links which is then converted to rotational motion of the output shaft.

Page 6: Gearless transmission
Page 7: Gearless transmission

GeneralLayout

Page 8: Gearless transmission

Applications• Tower clocks

• Gang drilling (multi spindle drilling)

• Lubrication pump for CNC lathe

• Angular drilling between 0 - 90 degree

• Movement of periscope in submarines

• Used in vehicles (go-carts)

• Hand driven machines like juice makers sheet folding machines etc.

Page 9: Gearless transmission

Geared v/s Gearless Transmission

GearedManufacturing

methods-• Costly.• manufactured on

special purpose machines

• Complex calculations

• No interchangeability

Gearless Manufacturing

methods-• Less costly.• No need of special

machines

• Less calculations

• Freedom of interchangeability

Page 10: Gearless transmission

Geared v/s Gearless Transmission

Geared Cause of failure -• Pitting, corrosion,

erosion and fatigue have severe effect.• Replacement of entire

gear set needs to be done.

Gearless Cause of failure - • Pitting, corrosion,

erosion and fatigue effect less severely

• Replacement of defected pin only

Page 11: Gearless transmission

Geared v/s Gearless Transmission

Geared Lubrication and

cooling-• Complex system• Cooling is a big

issue

Gearless Lubrication and

cooling• Simple• Easy to cool

Page 12: Gearless transmission

Geared v/s Gearless Transmission

Geared Torque transmitting

capacity• Used in high torque

applications

• Different speed at any angle is not easily possible

Gearless Torque transmitting

capacity• Low torque applications

• Different speed at any angle is easily done

Page 13: Gearless transmission

Geared v/s Gearless Transmission

Geared Efficiency• Due to friction hunting

and back lash efficiency cannot be more than 55%.

• Generally used for the applications where efficiency s less than 42%.

Gearless Efficiency• As very little friction plays

very while transmitting; the hunting and back lash one absent

• Efficiency as high as 90% to 92% is possible in gearless transmission mechanism.

Page 14: Gearless transmission

Materials S. No. Part

nameMaterial Quantity

1 Cylinders MS 22 Bearings CI 43 Shaft MS 24 Bent links MS 35 Frame MS 1

Page 15: Gearless transmission

ADVANTAGES

• Complete freedom of Interchangeability.• More efficient than gear.• Power could be transferred to any desired angle.• Ease of manufacturing.• Misalignment of shafts can be tolerated to some

extent.• Simpler cooling system• Low cost of manufacturing.• Portability of parts.

Page 16: Gearless transmission

LIMITATIONS

• Does not work at very low starting torque.

• Improper hole drilling could pose much problem.

• Sudden load would cause mechanism breakdown.

• Links are to be replaced after certain cycle time.

• Speed ratio is always constant 1:1.

Page 17: Gearless transmission

Future Aspects

• Torque bearing capacity can be improved.

• Flexible bent links can be used.

• Has a bright future in automation and robotics.

• Can be used in automobile industry in near

future.

Page 18: Gearless transmission

Conclusion

• The model works correctly as per the design• With the help of this system, we can efficiently

reduce the cost in power transmission and • Further advancement in this technology can be

made.

Page 19: Gearless transmission

THANK YOU.