International Journal of Applied Engineering Research, Dindigul
  • Year: 2010
  • Volume: 1
  • Issue: 2

Modeling and Analysis of Aluminum A360 Alloy Helical Gear for Marine Applications

  • Author:
  • Venkatesh B.1, Kamala V.2, Prasad A.M.K.3
  • Total Page Count: 11
  • Page Number: 124 to 134

1Vardhaman College of Engg, Hyderabad, India.

2MJCET, Hyderabad DGM (Retd), BHEL R&D, Hyderabad, India.

3Osmania college of Engg, Osmania University, Hyderabad, India, bvt_2275@yahoo.co.in.

Nomenclature:P

Power

Fa

Axial force in N

a

center distance in mm

Fr

Radial force in N

i

Gear ratio

FT

Tangential force in N

σc

Compressive stress in N/mm²

Ft

Static load produced in N

σb

Bending stress in N/mm²

Fd

Dynamic tooth load in N

σe

Endurance stress in N/mm2

Fs

Beam Strength of the gear tooth

[σc]

Design Compressive stress in N/mm²

Fi

Incremental load due to dynamic action

[σb]

Design Bending stress in N/mm²

C

Dynamic factor/Deformation factor

E

Young's modulus in N/mm2

D1

Pitch circle diameter of pinion

[Mt]

design torque in N-mm

FD

Design tooth load

β

Helix angle in degrees

Ψ

Ratio of band a

Fw

Wear tooth load in N

C

Correction factor

mn

Minimum Normal Module

Cv

Velocity factor

Φ

Pressure angle

Cs

Service factor

ρ

Density

ε

Poisson's ratio

b

Face width in mm

Z1

Number of teeth on pinion

pc

Circular pitch

Z2

Number of teeth on gear

N

Speed in RPM

Zv

Virtual Number of teeth

α

Pressure angle

Q

Ratio factor

αn

Normal pressure angle

V

Peripheral velocity in m/s

fs

Shear stress

d1

Diameter of the pinion in mm

T

Torque transmitted

d2

Diameter of the pinion in mm

d

Diameter of shaft in mm

Vm

Pitch line velocity in m/s

t

Thickness of Key

Yv

Lewis Form factor

w

width of key

pn

Normalpitch

Abstract

Gear s are one of the most critical components in mechanical power transmission systems. Today's competitive business in the global market has brought increasing awareness to optimize the gear design. The gears are generally used to transmit power or torque and the efficiency of transmission is very high when compared to other kind of transmissions. The helical gear offers high contact and more friction which avoids slippage when compared to spur gear. To estimate the bending stress, threedimensional solid models for different number of teeth are generated by CATIA that is powerful and modern modeling software and the numerical solution is done by ANSYS, which is a finite element analysis package. The analytical investigation is based on Lewis stress formula. The aim of the present study is to focus on reduction of weight and there byreducing the unbalance forces setup inthe system.

Keywords

Gear design, Computer aided analysis, highspeed helicalgear, dynamic analysis