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一、引言目前柴油机轴承轴心轨迹的计算原理基本上有两种,一种是Hahn.H.W.在1957年提出的对非稳定负荷的雷诺方程直接求数值解,形成了一套计算方法,称为汉氏法;另一种是Holland.J.在1959年按照力平衡原理提出另一套计算原理和方法,后来A.Eberhard和O.Lang 等人将其修正成适合电子计算机的形式,一般称为荷氏法。这两种方法都能根据轴承负荷的变化情况,算出轴颈中心在轴承中一系列平衡位置,从而得出每一瞬间油膜厚度数值。这一系列轴心平衡位置将在轴承平面上构成一条封闭曲线,称为轴心轨迹曲线。但是上述两种计算方法中都是假定轴承中油膜温度是已知的,因而润滑油的粘性系数也是已知的,在这个前提下进行计算。然而温度假定正确与否直接影响计算结果,因此当计算出轴
I. INTRODUCTION At present, there are basically two calculation principles for the bearing locus of diesel bearings. One is the direct solution to the Reynolds equation of unsteady load proposed by Hahn.HW in 1957, which forms a set of calculation methods called Han's method; the other is Holland.J. In 1959 in accordance with the principle of balance of forces put forward another set of calculation principles and methods, and later A.Eberhard and O.Lang et al amended it into a form suitable for electronic computers, said Dutch law. Both of these methods work out a series of equilibrium positions of the journal center in the bearing based on changes in bearing load, yielding the film thickness value at each instant. This series of axial equilibrium position will form a closed curve in the bearing plane, known as the axis of the trajectory curve. However, both of the above calculation methods assume that the temperature of the oil film in the bearing is known and the viscosity coefficient of the lubricating oil is also known. Calculations are made on this premise. However, the temperature assumption is correct or not, which directly affects the calculation results, so when calculating the axis