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Nirjhar Chakravorti
Nirjhar Chakravorti

FUNDAMENTAL, OPERATION & MAINTENANCE OF GEAR BOX

DesignDivertissement et humourBusiness
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TRANSMISSION SYSTEM: GEAR DRIVE GEARBOX FUNDAMENTAL, OPERATION & MAINTENANCE
Presentation by Nirjhar Chakravorti
Nirjhar Chakravorti has completed Mechanical Engineering in 2000 from Jalpaiguri Government Engineering College, India. Nirjhar has experience in design, development, project and plant engineering. During professional life, Nirjhar has worked on Gears also; its design, application, maintenance and failure.
Features… ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Introduction ,[object Object]
[object Object]
[object Object]
[object Object]
[object Object]
Why gears are used? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Disadvantages of gear drive ,[object Object],[object Object],[object Object],[object Object],[object Object]
Fundamental of Gearing ,[object Object],[object Object],[object Object],[object Object],A B T F= µR N R N ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
Gear Tooth Terminology
 
Important definitions ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
Principle of transmission & conjugate action ,[object Object]
Conjugate action ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gear teeth profile ,[object Object],[object Object],[object Object],[object Object],[object Object]
Involute curve ,[object Object]
Involute curve ,[object Object]
Cycloidal curve ,[object Object],[object Object],[object Object]
Cycloidal curve P (Trajectory followed by point “P” is called Cycloidal Curve) Fixed circle P (Trajectory followed by point “P” is called Epi-cycloidal Curve) P (Trajectory followed by point “P” is called Hypo-cycloidal Curve) Fixed circle
Why involute curve is widely used? ,[object Object],[object Object],Continued to next page…….
Why involute curve is widely used? ,[object Object],[object Object],[object Object],[object Object],Continued to next page…….
Why involute curve is widely used? ,[object Object],[object Object]
Disadvantages of involute curve over cycloidal curve: ,[object Object],[object Object],[object Object]
Interference & Undercutting ,[object Object],[object Object],[object Object],Continued to next page…….
Interference & Undercutting Continued to next page…….
Interference & Undercutting Geometry of proper teeth meshing Tooth correction : One of the method of avoiding undercut, is tooth correction or tooth enlargement. This is achieved by pinion enlargement (or correction as often termed), wherein the pinion teeth, still generated with a standard cutter, are shifted radially ourward to form a full involute tooth free of undercut The tooth is enlarged both radially and circumferentially.
Interference & Undercutting ,[object Object],[object Object],[object Object],[object Object],[object Object]
System of gear teeth ,[object Object],[object Object],[object Object],[object Object],[object Object]
Classification of gears ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Classification of gears Single Helical Gear Spur Gear Double Helical Gear Straight Bevel Gear Spiral Bevel Gear Worm Gear
Gear Making process ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Machining ,[object Object],[object Object],[object Object],[object Object]
Teeth formation process ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],Hob generation continued to next page…….
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Grinding continued to next page…….
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Tooth finishing process ,[object Object],[object Object],[object Object],[object Object],[object Object]
Type of gearbox ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Material ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
Volume hardened steel (or through hardened steel) ,[object Object],[object Object]
Case hardened steel ,[object Object],[object Object]
Material of gear/ gearbox generally used in Indian industries ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gear box lubrication ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Lubrication continued to next page…….
[object Object],Lubrication continued to next page…….
[object Object]
Gear failure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Case exfoliation ,[object Object],[object Object],[object Object],[object Object],[object Object]
Tooth Pitting ,[object Object],[object Object]
Tooth Pitting ,[object Object],[object Object],[object Object],[object Object]
Tooth Scuffing ,[object Object],[object Object],[object Object],[object Object],[object Object]
Tooth Scoring ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Tooth breakage ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Plastic deformation ,[object Object],[object Object],[object Object],[object Object],[object Object]
Smooth chemical wear ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Trouble shooting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gearbox heating up ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gearbox leakage ,[object Object],[object Object],[object Object]
Gearbox noise ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gearbox vibration ,[object Object]
Oil seal whistle ,[object Object]
Market products and specification ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Designation of gearbox ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
THANK YOU Please mail your valuable suggestion at [email_address] or [email_address] .

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Gear Box Nirjhar

  • 1. TRANSMISSION SYSTEM: GEAR DRIVE GEARBOX FUNDAMENTAL, OPERATION & MAINTENANCE
  • 3. Nirjhar Chakravorti has completed Mechanical Engineering in 2000 from Jalpaiguri Government Engineering College, India. Nirjhar has experience in design, development, project and plant engineering. During professional life, Nirjhar has worked on Gears also; its design, application, maintenance and failure.
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  • 27. Cycloidal curve P (Trajectory followed by point “P” is called Cycloidal Curve) Fixed circle P (Trajectory followed by point “P” is called Epi-cycloidal Curve) P (Trajectory followed by point “P” is called Hypo-cycloidal Curve) Fixed circle
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  • 33. Interference & Undercutting Continued to next page…….
  • 34. Interference & Undercutting Geometry of proper teeth meshing Tooth correction : One of the method of avoiding undercut, is tooth correction or tooth enlargement. This is achieved by pinion enlargement (or correction as often termed), wherein the pinion teeth, still generated with a standard cutter, are shifted radially ourward to form a full involute tooth free of undercut The tooth is enlarged both radially and circumferentially.
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  • 39. Classification of gears Single Helical Gear Spur Gear Double Helical Gear Straight Bevel Gear Spiral Bevel Gear Worm Gear
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  • 80. THANK YOU Please mail your valuable suggestion at [email_address] or [email_address] .