超高压液驱活塞压缩机液封结构设计及优化  

Design and Optimization of Liquid Seal Structure for Ultra-HighPressure Liquid Driven Piston Compressors

作　　者：张璟[1] 王硕琨 杜文海 ZHANG Jing;WANG Shuokun;DU Wenhai(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院机械工程学院,北京102617

出　　处：《北京石油化工学院学报》2024年第4期20-26,共7页Journal of Beijing Institute of Petrochemical Technology

基　　金：北京市自然科学基金资助项目(3182009);北京市教育委员会科技计划一般项目(KM201910017007)。

摘　　要：以某300 MPa超高压液驱活塞压缩机为研究对象,重新将其设计为液体密封结构,用甘油(C_(3)H_(8)O_(3))作密封液体,利用篦齿结构实现降压,提高了超高压压缩机的活塞密封寿命和密封效果。CFD仿真分析了液驱活塞压缩机循环密封液体的流场及油液各处的压力分布和循环流量。从齿宽、齿高、间距和齿数等参数对篦齿的降压效果进行了数值仿真,并分析其变化规律。结果表明:基于优化后的篦齿几何参数,CFD仿真计算显示该密封设计完全符合设计要求,为超高压液驱活塞压缩机密封选择提供了理论指导。This article focuses on a 300 MPa ultra-high pressure liquid driven piston compressor,redesigning it with a liquid sealing structure that utilizes glycerol(C_(3)H_(8)O_(3))as the sealing liquid.A grate structure is employed to depressurize the sealing liquid in the middle,enhancing the piston sealing life and the sealing effectiveness.CFD simulations were conducted to analyze the flow field of the circulating sealing liquid and to determine the pressure distribution and circulating flow rate.The pressure reduction effect of the grate teeth was numerically simulated,considering parameters such as tooth width,tooth height,spacing,and tooth number.The pressure reduction effect of the grate teeth was numerically simulated,considering parameters such as tooth width,tooth height,spacing,and tooth number.The optimized geometric parameters of the grate teeth,as indicated by the CFD simulation,ensure that the seal design meets the design requirements,offering theoretical guidance for selecting seals in ultra-high pressure liquid driven piston compressors.

关 键 词：超高压 液驱活塞压缩机 计算流体力学 活塞液封 篦齿优化 

分 类 号：TK14[动力工程及工程热物理—热能工程]