本文關(guān)鍵詞：永磁同步電主軸溫度場計算分析　出處：《沈陽工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 永磁同步電主軸 熱態(tài)特性 溫度場 有限元法

【摘要】：高速加工技術(shù)因其高速度、高效率、高精度等優(yōu)點已躍身成為了當(dāng)今先進制造技術(shù)中的關(guān)鍵技術(shù)。而在高速加工技術(shù)中,電主軸的溫升問題是影響其加工精度的一個主要因素,嚴(yán)重制約著高速加工技術(shù)的發(fā)展。為更好的研究電主軸的熱態(tài)特性,本課題選用發(fā)熱量較小的永磁同步電主軸,通過理論分析和有限元仿真對永磁同步電主軸的熱態(tài)特性進行研究,探究其溫度場的分布特點,在此基礎(chǔ)上得到其熱態(tài)特性變化規(guī)律,總結(jié)出能夠有效降低永磁同步電主軸溫升的措施,進而為以后電主軸的結(jié)構(gòu)設(shè)計起到一定的參考作用。課題主要研究了以下幾個方面的內(nèi)容:介紹了永磁同步電主軸的基本結(jié)構(gòu)和工作原理,并對主軸系統(tǒng)的主要關(guān)鍵技術(shù)進行了分析,包括與主軸熱態(tài)性能相關(guān)的潤滑技術(shù)和主軸的冷卻技術(shù)。分析了永磁同步電主軸的熱變形機理,并探究其主要熱源。討論了不同工況對電主軸溫升的影響,其中轉(zhuǎn)速和潤滑油的運動粘度對主軸的溫升影響較大。對永磁同步電主軸的兩大熱源進行分析及計算;對電主軸在運轉(zhuǎn)過程中的主要換熱系數(shù)進行了計算,包括:電機定子與循環(huán)冷卻管內(nèi)冷卻水的對流換熱、定轉(zhuǎn)子與氣隙空氣的對流換熱、轉(zhuǎn)子兩端與周圍空氣的換熱、軸承座與冷卻槽內(nèi)冷卻水的對流換熱、軸承與壓縮空氣的對流換熱,以及主軸外殼與周圍空氣的換熱。還研究了冷卻系統(tǒng)中的冷卻水流量、油氣潤滑系統(tǒng)的壓縮空氣流量對電主軸各換熱系數(shù)的影響。建立了永磁同步電主軸的有限元分析模型,并運用ANSYS Workbench軟件對永磁同步電主軸穩(wěn)態(tài)及瞬態(tài)溫度場進行仿真分析。通過溫度場分布圖,分析了溫度場的分布規(guī)律,結(jié)果顯示主軸整體溫度分布很不均勻,其中軸承處溫升最大。依照溫度場分布的規(guī)律總結(jié)了降低永磁同步電主軸溫升的措施,包括增大冷卻水的流量、對軸芯通壓縮空氣以及降低潤滑油運動的粘度,依據(jù)措施對電主軸改進后進行了溫度場仿真,并將結(jié)果與改進前溫度分布進行了對比,有效地降低了電主軸的溫升。
[Abstract]:High-speed machining technology has become the key technology in the advanced manufacturing technology because of its high speed, high efficiency, high precision and so on. The temperature rise of motorized spindle is one of the main factors that affect its machining accuracy, which seriously restricts the development of high-speed machining technology. In order to better study the thermal characteristics of motorized spindle. In this paper, the thermal characteristics of permanent magnet synchronous spindle are studied by theoretical analysis and finite element simulation, and the distribution characteristics of temperature field are explored. On the basis of this, the variation law of its thermal state characteristic is obtained, and the measures that can effectively reduce the temperature rise of PMSM are summarized. The main contents are as follows: the basic structure and working principle of permanent magnet synchronous spindle are introduced. The main key technologies of the spindle system are analyzed, including the lubrication technology related to the hot state performance of the spindle and the cooling technology of the spindle, and the thermal deformation mechanism of the permanent magnet synchronous motorized spindle is analyzed. The influence of different working conditions on the temperature rise of motorized spindle is discussed. The rotational speed and the viscosity of lubricating oil have great influence on the temperature rise of the spindle. The two heat sources of the permanent magnet synchronous motor spindle are analyzed and calculated. The main heat transfer coefficients of motorized spindle during operation are calculated, including: convection heat transfer of cooling water in motor stator and circulating cooling pipe, convection heat transfer between stator and rotor and air gap air. The heat transfer between the two ends of the rotor and the surrounding air, the convection heat transfer of the cooling water in the bearing seat and the cooling trough, and the convection heat transfer between the bearing and compressed air. The cooling water flow rate in the cooling system is also studied. The influence of compressed air flow rate on heat transfer coefficient of motor spindle is studied. The finite element analysis model of permanent magnet synchronous motor spindle is established. The steady and transient temperature fields of permanent magnet synchronous motor spindle are simulated and analyzed by ANSYS Workbench software, and the distribution law of temperature field is analyzed by temperature field distribution diagram. The results show that the overall temperature distribution of the spindle is very uneven, in which the temperature rise at the bearing is the largest. According to the temperature field distribution, the measures to reduce the temperature rise of the permanent magnet synchronous spindle are summarized, including increasing the flow of cooling water. The temperature field of the motorized spindle was simulated according to the measures to reduce the viscosity of the lubricating oil and the compressed air through the shaft, and the results were compared with the temperature distribution before the improvement. The temperature rise of the motorized spindle is reduced effectively.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG502.3

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本文編號：1364964