本文選題：陪試軸承 + 溫度場��； 參考：《河南科技大學(xué)》2013年碩士論文

【摘要】：陪試軸承是高鐵軸承試驗臺的關(guān)鍵零部件，它支承著試驗臺整個主軸系統(tǒng)，在高速運轉(zhuǎn)工況下承受著主軸上的巨大工作載荷。由于陪試軸承的工作轉(zhuǎn)速超過其參考轉(zhuǎn)速，在工作過程中必然產(chǎn)生大量的熱量，這些熱量如果不能及時散發(fā)出去，，容易造成陪試軸承溫度過高。如果陪試軸承的溫度超過一定范圍，就會造成潤滑劑的失效、軸承內(nèi)滾子與滾道表面之間油膜的破壞，使陪試軸承的滾動體和內(nèi)外圈出現(xiàn)燒傷、膠合，甚至軸承報廢，從而使試驗臺無法正常工作。因此，陪試軸承的正常運轉(zhuǎn)是整個高鐵軸承試驗正常進行的關(guān)鍵。對高鐵軸承試驗臺陪試軸承在工作時的溫度場特性進行研究，并根據(jù)其溫度特性設(shè)計散熱方法和散熱裝置，改善陪試軸承的工作環(huán)境，可以保證其在正常的溫度范圍內(nèi)工作，確保高鐵軸承試驗臺的正常運轉(zhuǎn)。 本文根據(jù)高鐵軸承試驗臺的設(shè)計要求，選取了合適的陪試軸承型號。利用兩種摩擦力矩計算方法對陪試軸承進行了計算，通過對比分析，選擇了更適合陪試軸承工況的摩擦力矩計算方法對陪試軸承進行生熱計算。利用熱流網(wǎng)絡(luò)法建立了陪試軸承的傳熱模型，對陪試軸承在各種工況下的生熱、傳熱和溫度特性進行了研究，并分別對陪試軸承徑向、外圈軸向和外圈周向的溫度分布進行了計算，得出了陪試軸承在各種工況下的溫度場特性。用有限元仿真方法對分析結(jié)果進行了驗證，仿真結(jié)果與計算結(jié)果基本吻合，說明傳熱模型正確，分析合理，為陪試軸承的散熱系統(tǒng)設(shè)計提供了理論依據(jù)。 針對陪試軸承溫度場的分析結(jié)果，設(shè)計了陪試軸承的散熱系統(tǒng)。提出了一種全新的滾動軸承散熱方法，在此方法基礎(chǔ)上設(shè)計了一種滾動軸承散熱裝置，為需要外部強制散熱的高速重載軸承提供了一種散熱解決方案。
[Abstract]:The test bearing is the key part of the high speed bearing test bed. It supports the whole spindle system of the test bed and bears the huge working load on the main shaft under the high speed operation condition. Because the working speed of the test bearing exceeds its reference speed, a lot of heat will be produced in the working process. If the heat is not released in time, it will easily cause the temperature of the test bearing to be too high. If the temperature of the test bearing exceeds a certain range, it will result in the failure of the lubricant, the destruction of the oil film between the roller and the surface of the raceway, and the burning, gluing, and even the scrapping of the rolling body and the inner and outer ring of the test bearing. So that the test bed can not work properly. Therefore, the normal operation of the test bearing is the key to the normal test of the high-speed bearing. The characteristics of temperature field of the test bearing of high speed bearing are studied, and according to its temperature characteristic, the heat dissipation method and device are designed to improve the working environment of the test bearing, so as to ensure that the bearing can work in the normal temperature range. Ensure the normal operation of the high-speed bearing test rig. According to the design requirements of the high-speed bearing test rig, the appropriate model of the test bearing is selected. Two kinds of friction moment calculation methods are used to calculate the test bearing. By comparing and analyzing the friction moment calculation method which is more suitable for the working condition of the companion test bearing is selected to calculate the heat generation of the companion test bearing. The heat transfer model of the test bearing is established by using the heat flow network method. The heat generation, heat transfer and temperature characteristics of the test bearing under various working conditions are studied, and the radial characteristics of the test bearing are studied respectively. The temperature distribution of outer ring axial direction and outer ring circumferential direction was calculated, and the temperature field characteristics of the test bearing under various working conditions were obtained. The finite element simulation method is used to verify the analysis results. The simulation results are in good agreement with the calculated results. The results show that the heat transfer model is correct and the analysis is reasonable, which provides a theoretical basis for the design of the heat dissipation system of the test bearing. According to the analysis results of the temperature field of the test bearing, the heat dissipation system of the test bearing is designed. A new heat dissipation method for rolling bearings is presented. Based on this method, a heat dissipation device for rolling bearings is designed, which provides a heat dissipation solution for high speed and heavy load bearings which require external forced heat dissipation.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：U270.33;TH133.3

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