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Abstract: With
the multilevel method, complete numerical solutions of finite line
contact thermal elastohydrodynamic lubrication (EHL) at heavy load are
obtained. The EHL properties of cylindrical rollers with crown profiled
ends are analyzed, and the effect of profiled geometry parameters and
working conditions is discussed. The results show that the lubrication
properties could be optimized which let the contacts adapt to the
operating conditions if the rollers are properly crowned. At heavy load,
considerable differences between the infinite and finite line contact
EHL properties in the middle parts may happen. Moreover, an “end oil
close effect” is brought forward to explain the above phenomenon
reasonably. It also shows that under certain operating conditions, the
rollers temperature will decrease with the increase of velocity.
Key words: Finite
line contact Thermal elastohydrodynamic lubrication (EHL) Heavy load
Edge effects Rollers with crown profiled ends
End oil
close effect
CLC No: TH117.2
国家自然科学基金(59475037、50175054)和上海市教委曙光计划(2000SG39)资助项目.
Received 20030221, received in revised form 20031230
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