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在液压系统工作中 ,液压油膜受到剪切作用会产生热量 ,由于这些热量不能完全以对流和热传导的方式散发掉 ,结果造成油膜温度升高 ,这将直接影响到液体的粘度和压力分布 ,并引起支承面压力的显著降低或油膜厚度的减小 ,很容易造成干摩擦 .结合实际情况 ,在考虑粘度变化的条件下 ,针对不同工况 ,应用有限元法对环形静压支承的流体流动特性进行了数值解析 ,获得了压力场、粘度场的分布规律 ,并与粘度为常数情况下的解析解进行了对比分析 ,当摩擦副之间的相对旋转速度较高时 ,油液粘度变化对静压支承中压力分布的影响不容忽视 .
In the hydraulic system, the hydraulic oil film is sheared and generates heat, which can directly affect the liquid viscosity and pressure distribution as the heat can not be dissipated completely by convection and heat conduction. As a result, the temperature of the oil film increases. Causing a significant reduction of pressure on the bearing surface or reducing the thickness of the oil film, it is easy to cause dry friction.According to the actual situation, taking into account the viscosity changes, the finite element method for different conditions, the hydrostatic flow characteristics of the annular hydrostatic support The distribution of pressure field and viscosity field are obtained and compared with the analytic solution under the condition of constant viscosity. When the relative rotation speed between friction pairs is relatively high, the change of oil viscosity to static The influence of pressure distribution in pressure bearing can not be ignored.