Machine Element Design Design of Belts and Chains

Design of Classical V-belts Classical V belts cross sections

Design of V-belts  Calculation of design horse power  Design horse power=trainsmitted horse power(given)*S.F  Selection of belt type  Calculation of pulleys dimensions and center distance  Calculation of horse power rating according to belt type  Correcting the horse power rating  Calculating the number of required belt rows

Table of Service factor for V-belts

Table of Service factor for V-belts(continued)

Selection of Classical V-belts cross section

Classical V-belt sheave and groove dimensions

Classical V-belt horse power rating formulas

Speed Ratio Correction Factor(Ksr)

Classical V-belts datum Length

Length Correction Factor

Arc of contact Correction Factor

Design of chains and Sprockets Roller chain Parts

Sprocket Dimensions  A Sprocket has three diameters:  Inner diameter  Outer diameter  Pitch diameter=P/sin(180/N)  Sprocket Parameters:  Pitch(P)  Number of Teeth(N)  chain parameter  Chain pitch(P)

Types of Sprockets

Selection of Service factor Design horse power=trainsmitted horse power(given)*S.F

Selection of Sprocket Type and Pitch based on horse power and speed of small sprocket

Roller Chain Dimensions(according to selected pitch)

Calculation of Center Distance and number of chain links  C: center distance  P: chain Pitch  L:chain length  N 1 : Number of small sprocket Teeth  N 2 : Number of largesprocket Teeth  d p : Pitch diameter of small sprocket  D p : Pitch diameter of large sprocket