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Role of Offset Factor in Offset-Halves Bearing

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Transactions on Engineering Technologies

Abstract

The present paper aims at presenting the influence of offset factor on the thermal characteristics of offset-halves journal bearing profiles. To study the effect of offset factor, an attempt has been made to the solve the Reynolds’s equation and energy equation using finite difference method on the performance characteristics such as oil-film temperatures, thermal pressures, load carrying capacity, power loss, and Sommerfeld’s number of offset-halves journal bearing. To carry the numerical solution of Energy equation, the author has used Parabolic Temperature Profile Approximation technique in order to achieve faster computation. It has been observed that at constant radial clearance, a decrease in oil-film temperature, thermal pressure, load carrying capacity and an increase in Sommerfeld’s number obtained with an increase in offset factor. During the study, it has been concluded that the offset factor significantly affects the performance parameters of the bearing under study and may be kept equal to around 0.4 to get the desired thermal characteristics.

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Abbreviations

e :

Eccentricity, m

O B :

Bearing centre

O j :

Journal centre

O L :

Lower-lobe centre

O U :

Upper-lobe centre

P :

Film pressure, Pa

R :

Journal radius, mm

r :

Bush radius, mm

T :

Lubricating film temperature, °C

U :

Relative velocity between journal and bearing surface, m/s

u, w :

Velocity components in X- and Z-directions, m/s

u L :

Velocity of lower bounding surface, m/s

u U :

Velocity of upper bounding surface, m/s

θ :

Angle measured from horizontal split axis in direction of rotation

ω :

Angular velocity of shaft, rad/s

φ :

Attitude angle

ɛ :

Eccentricity ratio

References

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, UIET, Panjab University, Chandigarh, 160014, India

    Amit Chauhan

Authors
  1. Amit Chauhan
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Correspondence to Amit Chauhan .

Editor information

Editors and Affiliations

  1. Department of Multimedia Engineering, College of Engineering, Mokpo National University, Mokpo, Jeonnam, Korea, Republic of (South Korea)

    Gi-Chul Yang

  2. Unit 1, 1/F IAENG Secretariat, International Association of Engine, Hong Kong, Hong Kong SAR

    Sio-Iong Ao

  3. Department of Applied Mathematics and Computing, Cranfield University, Cranfield, Bedfordshire, United Kingdom

    Len Gelman

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Chauhan, A. (2014). Role of Offset Factor in Offset-Halves Bearing. In: Yang, GC., Ao, SI., Gelman, L. (eds) Transactions on Engineering Technologies. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-8832-8_9

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  • DOI: https://doi.org/10.1007/978-94-017-8832-8_9

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-017-8831-1

  • Online ISBN: 978-94-017-8832-8

  • eBook Packages: EngineeringEngineering (R0)

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