同轴度偏差对缩套液压缸界面压力的影响研究

Study on influence of coaxality deviation on interfacial pressure of shrink-fit cylinder

基于弹塑性缩套缸体理论,笔者建立了存在同轴度偏差的双层缩套缸体数学模型,并通过工程实际应用验证了该数学模型界面压力计算值与有限元计算值吻合,说明该数学模型符合实际情况,对实际工程具有一定的理论指导意义。通过该模型可知,由于缩套缸体内筒外壁界面压力沿圆周呈现减小的趋势,因此精密缩套缸体应严格控制同轴度偏差。

The paper established the mathematical model of two-layer shrink fit cylinder with proper coaxality deviation based on the theory about elastic-plastic shrink fit cylinder. An example was applied to show that the interfacial pressure value of the mathematical model was identical with the data of finite element analysis, which indicated the model conformed to actual condition and possessed some theoretical guidance for actual project. The application of the model indicated that the coaxality deviation of the shrink-fit cylinder should be controlled strictly since the interfacial pressure between inner cylinder and outer one decreased gradually around the circumference.