| The vibration monitor and diagnosis technology has been widely applied in maintenance and management of the modern film production plant, responding to the much more complexity and precision of the extruder equipments. So far, it has created huge economic and social benefits. Monitoring the condition of the extruder unit and executing the predict maintenance prior to the malfunction is one of the advanced technology in the field of the equipment maintenance. The paper analyses the possibility and necessity about the predict maintenance application on extruder unit ,according to the research on the structure of the film manufacture plant as well as the extruder unit's running condition in Wuxi huanya packing material Co,ltd. Besides, based on the analysis on condition monitor technology in domestic and abroad , it acquires obvious effect to solve the malfunction quickly and keep the extruder running normally by analyzing the vibration data obtained by the frequency analysis apparatus. Additionally, the vibration case occurred on the extruder unit and the condition repair case can be the reference for other similar plants. The paper focus on the follows:Chapter 1 summarizes the meaning of the technical study on the conditiong monitor and diagnosis rotating mechanism, introducing the trend of the vibration monitor technology, putting forward the research direction.Chapter 2 introduces the treatment way for digital signal。Chapter 3 summarizes the system analysis on the fault characters and the fault theory about the extruder unit as well as the typical parts such as bearing and gear, according to the principle of the spectrum analysis, time series analysis, demodulation analysis, cepstrum analysis. It also introduces the case about fault detection and predict maintenance.Chapter 4 introduces the set up of the predict maintenance system in huanya packing material Co,ltd.In the last Chapter, all of the works in this dissertation are summed up.The future work is also prospected.
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