涡轮钻具密封环温度场有限元分析

摘要

In order to ensure reliable and long-term stability of turbodrill oil-storage metal seal rings, to select high quality temperature resistance sealing materials, and to provide the basis for controlling temperature,it is necessary to master the heated condition and the main factors of each part of seal ring. The stable temperature field of the oil seal ring of turbodrill was simulated using ANSYSll. 0 finite element program with reasonable assumptions. The distribution of cloud and temperature isotherm map of sealing ring under high pressure and temperature was obtained. This paper discussed the impacts of several important parameters on the temperature field distribution of sealing surface. The results show that, the temperature on the sealing surface closing to inner diameter is highest. Temperature on the sealing ring decreases as the axial size increases. This relates to thermal conductivity of sealing ring and surrounding medium thermal convection. The seal face temperature changes linearly with the spindle speed and average diameter of seal faces. In order to avoid large thermal deformation or thermal cracking under higher temperature,good thermal conductivity sealing materials should be used to reduce the surface temperature of sealing ring.%为保证涡轮钻具储油金属密封环稳定可靠地长期工作和为选择高品质的耐温密封材料及采取控温措施提供依据,必须掌握密封环各部分的温度分布情况和主要影响因素.在合理假设条件下,利用ANSYS11.0有限元程序对涡轮钻具储油密封环稳态温度场进行了数值计算,得到了密封环在井下高温环境下的温度分布云图及等温线图,并讨论了几个重要参数对密封环温度场的影响.结果表明,密封环端面温度最高点靠近内径处;密封环内的温度随轴向尺寸增加而逐渐降低,这与密封环的导热系数和其与周围介质对流换热情况有关;密封端面温度与主轴转速和密封端面平均直径近似呈线性关系;对于在高温条件下使用的密封环,为避免引起较大的热变形或热裂现象,应选用导热系数较大的密封材料来降低端面温度.