.轮机英语（轮机长大管轮）Lesson 21 Maintenance and Repair of Centrifugal Pumps.ppt

Lesson21MaintenanceandRepairofCentrifugalPumpsNewWordsandExpressionscentrifugal[?prins?pl]n.原则，原理，法则impeller[?mpel?]n.叶轮strip[str?p]vt.拆卸curved[k?rvd]adj.弧形的，曲线的kinetic[k??n?t?k,ka?-]adj.运动的volute[v?lut]n.蜗壳spin[sp?n]vt.转动tangentially[t?nd?en?l?]adv.切向，沿切线方向NewWordsandExpressionsradially[re?d?rl?]adv.径向的，放射状的vane[ven]n.叶片expelling[?kspel??]vt.排出horizontal[?h?r??zɑntl]adj.水平的，卧式的；isolate[?a?s??let]vt.使隔离，使孤立；[电]使绝缘；cease[sis]vi.终止，停止；shackle[???k?l]n.卸扣，钩环sling[sl??]n.吊索NewWordsandExpressionsbolt[bo?lt]n.螺栓tape[tep]n.带子；胶带，磁带；卷尺；gauge[ɡed?]n.测量仪器reservoirs[?rez?rvwɑ(r)]n.贮液器scrape[skrep]vt.擦，刮gasket[?ɡ?sk?t]n.垫圈，衬垫disregard[?d?sr??gɑrd]n.丢弃，漠视，忽视stagger[?st?ɡ?]vt.错开NewWordsandExpressionsgland[ɡl?nd]n.[机]密封压盖，填料盖；pitting[p?t??]n.蚀损斑；点蚀；锈斑；凹痕alloy[??l???]n.合金epoxy[??pɑksi]adj.环氧的putty[?p?ti]n.灰油，腻子thread[θr?d]n.螺纹grip[ɡr?p]vt.握紧，抓牢longitudinal[?lɑnd???tudnl]adj.纵向的NewWordsandExpressionsmegger[meg?]n.高阻表；摇表；高阻计；dampness[?d?mpn?s]n.湿气，潮湿；湿度；Centrifugalpumpshavebeenusedinindustryforahundredandfiftyyearsormore.Theyareusedtoconverttheenergyfromthepumpdrivertokineticandpotentialenergyintothefluid,viatheimpeller.Theyareusedaboardshipstocirculateseawaterandfreshwatercoolingforthemainengine.A?shipsengineroom?containsseveraldifferent?typesofpumps?includingcentrifugalpumps.Inthenextfewsections,themaintenanceofcentrifugalpumpsisexplained.Herewewillhavealookattheproceduretostrip,inspectandreassembleacentrifugalpump,formingpartofthe?plannedmaintenanceschedule?onboardshipsforthepurposeofmaintainingtheequipmentinoptimumoperatingcondition9在这里，我们将看看拆卸，检查和重新组装离心泵的程序，这是船上维修保养计划的一部分，目的是保持设备在最佳状态运行）.Thefirstsectiongivesanoverviewofatypicalcentrifugalpumpoperation.OverviewAswesawearlier;thecentrifugal