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按照经典流体动压润滑理论计算动压径向滑动轴承的静特性,所得泄油量的计算值与试验结果相差较大,这已成为目前静特性计算中的突出问题。虽然,导致上述误差的因素颇多,但主要原因之一是由于经典理论对轴承中的油膜上游边界所作的假设不合理.本文以有限长圆轴承为例,探讨了确定油膜上游边界的数学模型;提出了确定油膜上游边界的方法和计算公式;计算、试验、分析了不同结构、运行参数对油膜上游边界和轴承静特性的影响,特别是对泄油量的影响。
According to the classical hydrodynamic lubrication theory, the static characteristics of hydrodynamic radial sliding bearing are calculated, and the calculated value of the discharged oil amount differs greatly from the experimental results, which has become a prominent problem in the calculation of static characteristics. Although there are many factors leading to these errors, one of the main reasons is that the assumption made by the classical theory on the upstream boundary of the oil film in the bearing is not reasonable.In this paper, the finite element bearing is taken as an example to discuss the mathematical model for determining the upstream boundary of the oil film. The method and formula for determining the upstream boundary of oil film are put forward. The influences of different structures and operating parameters on the upstream boundary of oil film and static characteristics of bearing are calculated, tested and analyzed.