二级振动分析师培训教材_Pruf .pdf

Category II MOBIUS INSTITUTE Vibration Training Course Book Category II Pruftechnik Trading (Shanghai) Co., Ltd Vibration Training Course Book – Category II Copyright 1999-2011 Mobius Institute – All rights reserved learn@ Rev. 31-03-10 Pruftechnik Trading (Shanghai) Co., Ltd T A B L E O F C O N T E N T S P A G E 1 Table of Contents Chapter 1 Maintenance Practices 1-1 Why Do We Perform Vibration Analysis? 1-2 What Costs Can Be Reduced? 1-2 Why Do Machines Fail? 1-3 Breakdown Maintenance1-6 Breakdown Maintenance Summary1-8 Preventive Maintenance1-9 Preventive Maintenance Summary 1-13 Predictive Maintenance 1-14 Condition Monitoring 1-15 Predictive Maintenance Summary 1-17 Precision Maintenance 1-18 Summary of Precision Maintenance 1-20 Chapter 2 Principles of Vibration 2-1 Introducing Vibration2-2 What is Vibration? 2-3 Time Waveforms2-7 Frequency2-10 Period 2-12 Amplitude 2-14 Complex Vibration2-16 The Spectrum2-17 Orders2-25 Forcing Frequencies2-29 Describing Vibration 2-33 Complex Vibration 2-35 Crest Factor 2-37 Vibration Units2-37 Displacement2-39 Velocity 2-40 Acceleration2-43 Comparing Units 2-45 Overall Readings and Trending 2-56  1999-2011 Mobius Institute – All rights reserved