高转速离心机转鼓和螺旋输送器振动特性分析  

Vibration Characteristics Analysis of Drum and Spiral Conveyor of High Speed Horizontal Screw Centrifuge

作　　者：李华川 席建秋 吴先进 刘有平 蒋锐 刘少胡[2] 甘泉泉 Li Huachuan;Xi Jianqiu;Wu Xianjin;Liu Youping;Jiang Rui;Liu Shaohu;Gan Quanquan(Sichuan Baoshi Machinery Special Vehicle Co.,Ltd.;School of Mechanical Engineering,Yangtze University)

机构地区：[1]四川宝石机械专用车有限公司 [2]长江大学机械工程学院

出　　处：《石油机械》2021年第5期9-16,共8页China Petroleum Machinery

基　　金：国家自然科学基金项目“含缺陷连续管残余承载能力评估与分析方法研究”(51604039);长江青年科技创新团队基金项目“油气高效钻井技术及工具研究”(2016cqt01)。

摘　　要：在卧螺离心机振动问题的研究中,缺乏对其在4200 r/min高转速时不同结构参数和整机模型的分析。为此,通过建立数值计算模型,对转速为4200 r/min卧螺离心机的转鼓和螺旋输送器进行整体与单体模态分析,研究结构参数对其模态的影响。分析结果表明:钻井液分离时转鼓和螺旋输送器的振动频率为58.33 Hz,通过改变叶片螺距或厚度可以调节整机共振临界频率;推荐螺旋输送器的螺距为116 mm,厚度为7.5 mm;螺旋输送器叶片倾角和半锥角对临界转速影响较小,建议根据固液分离特性对其进一步优选;转鼓在工作转速下不会发生共振,改变转鼓的圆柱段或圆锥段壁厚会减小转鼓的临界转速,其中转鼓的圆柱段对振动的影响较明显。研究结论可以为高速卧螺离心机的设计提供技术参考。The research on the vibration problem of the horizontal screw centrifuge lacks analysis of its different structural parameters and the whole machine model at a high speed of 4,200 r/min.For this reason,a numerical calculation model is established to analyze the horizontal screw centrifuge’s overall and single modal of drum and spiral conveyor at the rotation of 4,200 r/min.The influence of structural parameters on its modal is studied.The analysis results show that the vibration frequency of the drum and the spiral conveyor is 58.33 Hz when the drilling fluid is separated.The critical frequency of the resonance of the whole machine can be adjusted by changing the pitch or thickness of the spiral conveyor blades.The recommended spiral conveyor pitch and thickness are 116 mm and 7.5 mm.The conveyor blade inclination and half-cone angle have little effect on the critical speed,but is recommended to be further optimized according to the characteristics of solid-liquid separation.The drum will not resonate at the working speed.Changing the wall thickness of the cylindrical or conical section of the drum will reduce the critical rotation speed.The cylindrical section of the drum has a more obvious impact on vibration.The study can provide technical references for the design of high-speed horizontal screw centrifuge.

关 键 词：卧螺离心机 螺旋输送器 转鼓 振动 模态 振动频率 临界转速 

分 类 号：TE254[石油与天然气工程—油气井工程]