發(fā)布時(shí)間：2018-04-25 14:35

  本文選題：高壓熱水泵 + 轉(zhuǎn)子振動(dòng)�。� 參考：《華東理工大學(xué)》2014年碩士論文

【摘要】：本課題以吉化廢液焚燒爐高壓熱水泵轉(zhuǎn)子振動(dòng)問(wèn)題為研究對(duì)象,分析了葉輪結(jié)構(gòu),并對(duì)其進(jìn)行了受力分析,計(jì)算了軸向力、動(dòng)反力與徑向力。對(duì)支承該高壓水泵的軸承壽命進(jìn)行了計(jì)算,證明了其具有安全性。歸納了軸承-轉(zhuǎn)子系統(tǒng)橫向彎曲振動(dòng)的微分方程,介紹了傳遞矩陣的基本理論,對(duì)高壓水泵的轉(zhuǎn)子進(jìn)行了離散化,建立了轉(zhuǎn)子振動(dòng)計(jì)算模型,并歸納了對(duì)該模型進(jìn)行數(shù)值求解的具體方法。通過(guò)對(duì)滾動(dòng)軸承和對(duì)彈流潤(rùn)滑油膜的力學(xué)分析,建立了能夠?qū)L動(dòng)軸承剛度系數(shù)和阻尼系數(shù)進(jìn)行計(jì)算的公式。對(duì)水泵軸承-轉(zhuǎn)子系統(tǒng)進(jìn)行集總質(zhì)量離散化,通過(guò)Matlab軟件編程,求解了高壓水泵轉(zhuǎn)子的固有頻率、臨界轉(zhuǎn)速、振動(dòng)響應(yīng)、振型等振動(dòng)性能參數(shù)。通過(guò)研究發(fā)現(xiàn),該高壓水泵在正常工作過(guò)程處于第二階與第三階臨界轉(zhuǎn)速之間,而正常實(shí)際工作轉(zhuǎn)速與三階臨界轉(zhuǎn)速十分接近,是導(dǎo)致高壓泵轉(zhuǎn)子長(zhǎng)期處于較強(qiáng)烈振動(dòng)的主要原因之一。分左葉輪偏心右葉輪不偏心、左葉倫不偏心右葉輪偏心、左右葉輪同時(shí)偏心三種情況研究受迫振動(dòng)時(shí)的振幅與轉(zhuǎn)速關(guān)系,繪制了相關(guān)曲線圖。 本文的研究成果可以為吉化廢液焚燒爐高壓水泵的振動(dòng)性能改進(jìn)提供理論參考。
[Abstract]:In this paper, the rotor vibration of high pressure hot water pump in Jihua waste liquid incinerator is studied. The impeller structure is analyzed, and the axial force, dynamic reaction force and radial force are calculated. The bearing life of the high-pressure pump is calculated and proved to be safe. The differential equation of lateral bending vibration of bearing-rotor system is summarized, the basic theory of transfer matrix is introduced, the rotor of high pressure pump is discretized, and the rotor vibration calculation model is established. The concrete method of numerical solution of the model is also summarized. Based on the mechanical analysis of rolling bearing and elastohydrodynamic lubricating oil film, a formula for calculating the stiffness coefficient and damping coefficient of rolling bearing is established. The lumped mass of water pump bearing-rotor system is discretized. The natural frequency, critical speed, vibration response and vibration mode of high pressure pump rotor are solved by Matlab software. It is found that the high pressure pump is between the second order and the third order critical speed in the normal working process, but the normal actual working speed is very close to the third order critical speed. It is one of the main reasons that the high pressure pump rotor is in strong vibration for a long time. The relationship between amplitude and rotational speed of forced vibration is studied in three cases: left impeller eccentricity, left impeller eccentric right impeller eccentricity, left impeller eccentric right impeller eccentricity and left impeller eccentricity and left impeller eccentricity. The research results in this paper can provide a theoretical reference for improving the vibration performance of high pressure water pump in Jihua waste liquid incinerator.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB53;TH38

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