带流量调节系统的往复式压缩机连杆轴瓦润滑特性分析  

Lubricating oil film analysis of connecting rod bearing bush of reciprocating compressor with flow regulating system

作　　者：王多才 王瑶[2] WANG Duo-cai;WANG Yao(West-East Gas Transmission Branch National Pipeline Network Group United Pipeline Co.,Ltd.,Science&Technology Information Center,Shanghai 200131,China;Compressor,Health Intelligent Monitoring Center of State Key Laboratory of Compressor Technology,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]国家管网集团联合管道有限责任公司西气东输分公司科技信息中心,上海200131 [2]北京化工大学压缩机技术国家重点实验室压缩机健康智能监控中心,北京100029

出　　处：《机电工程》2023年第6期890-895,共6页Journal of Mechanical & Electrical Engineering

基　　金：压缩机技术国家重点实验室(压缩机技术安徽省实验室)开放基金资助项目(SKL-YSJ201911)。

摘　　要：往复式压缩机采用进气流量调节系统后,会导致其连杆轴瓦磨损、烧瓦故障率上升。针对这一问题,以一台2D20的压缩机为例,对流量调节状态下的往复式压缩机连杆轴瓦润滑特性进行了研究。首先,分析了压缩机活塞运动过程中传动机构的作用力,并基于压缩机热力循环过程,构建了含连杆轴瓦润滑油膜的压缩机动力学模型;然后,利用RecurDyn软件对传动机构进行了运动学和动力学仿真分析,并研究了不同流量负荷对活塞杆受力特性的影响;最后,量化分析了10%~100%流量调节负荷对于连杆轴瓦油膜润滑特性的影响。研究结果表明:相比于作用力的换向,十字头销与轴瓦水平相对位置的换向具有明显的滞后性,且在15%~40%的低流量负荷段内,十字头销和衬套组件的两侧润滑效果均有较为明显的恶化;在设备的实际运行过程中,应避免使其长期处于低调节负荷段内运行;该结果可以为设备人员进行压缩机流量优化调节提供实际的参考。Aiming at the problem of the wear and burn failure rate rise of the connecting rod after the intake flow regulating system was adopted in the reciprocating compressor,the lubrication characteristics of the connecting rod bearing bush under the flow regulating conditions were studied by taking a 2D20 compressor as an example.Firstly,the force of the transmission mechanism in the process of piston movement was analyzed,and the compressor dynamic model including the lubricating oil film of the connecting rod bearing bush was built based on the compressor thermodynamic cycles.Then,RecurDyn software was used to simulate the kinematics and dynamics of the transmission mechanism,and the influence of different flow loads on the mechanical characteristics of the piston rod was studied.Finally,the influence of 10%~100%flow regulation load on the oil film lubrication characteristics of connecting rod bearings was quantitatively analyzed.The research results indicate that the reverse direction of the horizontal position of the cross-head pin and the bearing bush has a significant lag compared with the reverse direction of the applied force,and the lubrication effect of both sides of the crosshead pin and the bushing assembly has significantly deteriorated in the 15%~40%low flow load section.During the actual operation of the equipment,it is necessary to avoid the equipment running in the low-regulated load segment for a long time,which provides a practical reference value for the equipment personnel to optimize and adjust the compressor flow.

关 键 词：活塞式压缩机 进气流量调节 气体力 连杆轴瓦磨损 润滑油膜 油膜润滑特性 压缩机流量调节 

分 类 号：TH457[机械工程—机械制造及自动化]