Different relations used in belt drive, Mechanical Engineering

Assignment Help:

Q. Write different relations used in belt drive.

Sol: Let:

D₁ = Diameter of driver

N₁ = Speed of the driver in Rotation per minute

D₂ = Diameter of the driven or Follower

N₂ = Speed of the driven or follower in Rotation per minute
R₁ = Radius of the driver

R₂ = Radius of the driven or Follower

t = Belt thickness

X = Distance between the centers of two pulleys

α = Angle of lap (less than 10º)

θ = Angle of contact (greater than 150º) (express in radian.)

μ = Coefficient of friction

s = Total slip in percentage
L = Total length of belt

Formula For Open Belt Drive

V.R. V.R = N2/N1

The thickness is V.R = N2/N1 = 426_slip of belt5.png

The slip is V.R = N /N = (D1/D2) [1-s/100]

Slip and thickness both are considered V.R = N2/N1 = 426_slip of belt5.png [1-s/100]

Angle of contact θ = ∏ - 2α

Angle of lap Sinα = (r1-r2)/X

Length of belt L = ∏ (r1 + r2)²/x + 2X

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