羅茨鼓風機振動的原因及解決方法
Cause and Solution of Roots Blower Vibration
羅茨鼓風機在使用過程中，由于各種原因，振動加劇，后來損壞，嚴重時會造成重大設備事故。以下是羅茨鼓風機振動的一些故障原因。
During the use of Roots blower, due to various reasons, the vibration is intensified, and then it is damaged, which may cause major equipment accidents in serious cases. The following are some fault causes of Roots blower vibration.
(1)設計原因:羅茨鼓風機的設計一般是根據(jù)鼓風機的使用環(huán)境、溫度、風量、風壓、介質等進行設計的，但有些企業(yè)沒有完全根據(jù)這些因素進行選擇，導致鼓風機設計不當、動態(tài)特性差、運行時振動的結構不合理、應力集中的設計作業(yè)轉速接近或落入臨界轉速區(qū)的熱膨脹量計算不正確，熱狀態(tài)不良。
(1) Design reason: Roots blower is generally designed according to the use environment, temperature, air volume, air pressure, medium, etc. of the blower. However, some enterprises have not selected the blower completely according to these factors, resulting in improper design of the blower, poor dynamic characteristics, unreasonable structure of vibration during operation, close design operation speed of stress concentration or incorrect calculation of thermal expansion amount falling into the critical speed zone, and poor thermal state.
(2)安裝和維護原因:羅茨鼓風機的安裝精度對鼓風機的運行起著關重要的作用。如果安裝精度達不到安裝要求，會破壞羅茨鼓風機的運行。在鼓風機的設置過程中，機械設置不當，零件錯位，預負荷大的軸系對中不良的機械配合間隙、過剩量和相對位置調整不當?shù)霓D子長期放置不當，動平衡精度發(fā)生變化，沒有按照規(guī)定進行檢查，破壞了機械本來的配合性質和精度。
(2) Reason for installation and maintenance: The installation accuracy of Roots blower plays a vital role in the operation of the blower. If the installation accuracy fails to meet the installation requirements, the operation of roots blower will be damaged. During the setting of the blower, the mechanical setting was improper, the parts were misaligned, the poor mechanical fit clearance of the shafting with large preload, the excessive amount and the rotor with improper adjustment of the relative position were improperly placed for a long time, the dynamic balance accuracy changed, and the inspection was not carried out according to the provisions, which damaged the original matching nature and accuracy of the machinery.
(3)操作運行原因：在羅茨風機使用過程中，對風機維護、保養(yǎng)的好壞，對羅茨風機的運行質量起著決定性作用。如：工藝參數(shù)偏離設計值，機器運行工況不正常；機器在超轉速、超負荷下運行，改變了機器的工作特性；潤滑或者冷卻不良；轉子局部損壞或結垢；啟停機或升降速過程操作不當，熱膨脹不均勻或在臨界區(qū)停留時間過久。
(3) Operation reason: During the use of Roots blower, the quality of fan maintenance plays a decisive role in the operation quality of Roots blower. For example, the process parameters deviate from the design values, and the operating conditions of the machine are abnormal; The operation of the machine at over speed and over load changes the working characteristics of the machine; Poor lubrication or cooling; Rotor is locally damaged or scaling; Improper operation during startup and shutdown or speed increase and decrease, uneven thermal expansion or excessive time in critical area.

(4)機器劣化原因：一般設備在使用時都有一定的年限，達到一定年限設備性能將惡化。對羅茨風扇也是如此，長時間運轉時，轉子撓度增加或動平衡劣化，轉子局部損壞、脫落或產(chǎn)生裂紋，零件磨損、點蝕或腐蝕等，配合面受力劣化，產(chǎn)生過盈、過松等，破壞配合性能和精度，機架基礎沉降不均，機殼變形。
(4) Reasons for machine deterioration: General equipment has a certain number of years in use, and the performance of equipment will deteriorate after reaching a certain number of years. The same is true for Roots fans. During long-term operation, the rotor deflection increases or the dynamic balance deteriorates, the rotor is partially damaged, peeled off or cracked, parts are worn, pitted or corroded, the force on the mating surface deteriorates, resulting in interference, looseness, etc., which destroys the mating performance and accuracy, the frame foundation settlement is uneven, and the casing is deformed.
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