Taking gear without tooth face invalidation such as agglutination and abrasion as a precondition , and according to the relation between minimal oil film thickness and tooth face roughness of elastic liquid dynamic pressure lubrication theory , viscosity of gear lubrication oil was educed by reliability method in this paper , and the calculation formula has been elicited and applied 摘要以齒輪傳動(dòng)不發(fā)生膠合、磨損等齒面失效為前提,根據(jù)彈性流體動(dòng)壓潤(rùn)滑理論的最小油膜厚度與齒面粗糙度的關(guān)系,用可靠性方法確定齒輪潤(rùn)滑油的粘度,給出計(jì)算公式并進(jìn)行了實(shí)例計(jì)算。