基于ANSYS的井下增压器活塞间隙密封研究  

Research on the Clearance Seal of Piston in Down-hole-pump by ANSYS

作　　者：彭勃[1] 郭楚文[1] 赵韡[1] 邓杰[1] 

机构地区：[1]中国矿业大学电力工程学院,江苏徐州221116

出　　处：《润滑与密封》2014年第5期69-71,76,共4页Lubrication Engineering

基　　金：中国矿业大学研究生实践与科研创新基金项目(GSF121109)

摘　　要：针对井下增压器活塞密封问题,提出以非接触式迷宫间隙密封代替原有填料密封。构建迷宫间隙密封的二维增阻槽模型,基于ANSYS-Fluent流体仿真软件,采用SST模型和SIMPLE算法,分析单个槽槽深和槽宽与泄漏量之间的关系,并探讨有限长度下增阻槽的布置方法。结果表明:槽深一定时,泄漏量随着槽宽的增大而增大;槽宽在1 mm以上时,当槽宽深比在2∶1左右泄漏量最小;槽深增大达到槽宽深比为1∶1时,随着槽深增大泄漏量的变化趋于平缓。在有限长度下,槽间距增大,槽与间隙进出口的距离减小,泄漏量随着槽间距的增大呈现出先减少后增大的规律,因此必须合理匹配槽间距及槽与间隙进出口的距离,才能达到较好的密封效果。Non-contact labyrinth-clearance seal was presented to replace the packing seal of the piston of down-hole-pump. Two-di- mensional groove model of labyrinth-clearance seal was set up, and the effect of groove width and groove depth on the leakage was analyzed by adopting SST turbulent model and SIMPLE algorithm and based on ANSYS-Fluent simulation software. The arrangement of the groove with limited length was explored. The results indicate that there is a positive correlation between the leakage and the groove width when the seal depth is fixed. The leakage .is the smallest when the width-depth ratio is about 2 ： 1 while the groove width is more than 1 mm, and the trend of flattening of the leakage is occurred while .the width-depth ratio reach to 1 ： 1. The leakage of seal is first increased and then de- creased in a certain seal length along with the increasing of the distance between grooves or the decreasing of the distance among grooves and the inlet and outlet of clearance. So the rational matching of the distance among grooves and the inlet and outlet of clearance is impor- tant to get good sealing property.

关 键 词：井下增压器 间隙密封 泄漏损失 

分 类 号：TB42[一般工业技术]