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Abstract: The
lubrication äreä is divided into the dynamic lubrication äreä
and the elastic lubrication äreä basing on the lubrication
status of valve-valve guide. The different grids are adopted in
the two lubrication areas. Reynolds equatäon in elastic äreä is
transformed by ftmction in order to make convergence quickly.
Through the iterative calculation of the valve dynamics, the
dynamie lubrication and the elastic lubrication, the balance
position relative to valve guide are gained, The lubrication
status of valve-valve guide is estimated basing on the minimum
oil film thickness and effective roughness, Basing on the
lubrication status of valve-valve guide, the maximum stress of
contact äreä used as the limit of the valve-valve guide abrasion
is provided, and theHertzian contact stress distribution
function of valve— valve guide contact äreä is given.
Key words: Valve-valve
guide Fluid dynamic lubrication Elastic liquid
lubrication Contact stress
CLC No: TK414.1
机械工业技术发展基金项目(95JA0101). Received 20010315, received in revised form
20010428
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