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  本文選題：膜片聯軸器 + 無鍵聯接�。� 參考：《華東理工大學》2011年碩士論文

【摘要】：聯軸器是用來聯接不同機構中的兩根軸(主動軸和從動軸)并使之共同旋轉以傳遞扭矩的機械零件。常用的聯軸器在使用過程中,存在緩沖性能差、不能補償軸向和角向偏差、與軸脫開困難等問題。針對上述問題,本文設計開發(fā)了一種新型無鍵膜片式聯軸器,并用有限元技術進行了應力分析和結構優(yōu)化。主要研究內容如下： 首先,針對鍵槽聯接中存在與軸脫開不方便及應力集中的缺陷,設計了依靠螺栓進行預緊的錐面無鍵聯接結構；針對緩沖減震性能差、不能補償軸向和角向偏差的問題,設計了利用金屬膜片組來吸震,和利用中間節(jié)進行緩沖的結構。 其次,利用ANSYS軟件分析了錐面無鍵聯接中所需的預緊力,及預緊力與傳遞最大扭矩之間的關系,得到了扭轉過程中襯套中產生的最大應力值及所產生的部位；并進一步分析了不同的預緊錐度和厚度對扭矩傳遞帶來的影響。根據有限元分析結果,對預緊結構進行了優(yōu)化設計,提出了合理的襯套預緊錐度和襯套厚度。 第三,對聯軸器膜片在不同工況下的受力情況進行了有限元分析,研究了軸向偏差和角向偏差對最大應力帶來的影響；得到了膜片在工作過程中產生的最大應力及產生的部位,校核了膜片的強度,進一步得到了應力達到材料的屈服極限時,膜片所承受的軸向和角向偏差。 最后,利用ANSYS中的疲勞分析模塊,針對給定受力情況,對膜片進行了疲勞壽命估算,預測了膜片的使用壽命,研究了角向偏差對疲勞壽命帶來的影響。
[Abstract]:The coupling is a mechanical part that connects two shafts (drive shaft and follower shaft) in different mechanisms and rotates them together to transfer torque. The commonly used couplings have some problems such as poor buffering performance, unable to compensate the axial and angular deviations, and difficulty in detaching from the shaft. In order to solve the above problems, a new type of keyless diaphragm coupling is designed and developed, and the stress analysis and structural optimization are carried out by using finite element technique. The main contents of the study are as follows: First of all, in view of the inconvenient connection with axis and the defect of stress concentration in keyway connection, the tapered bondless connection structure which depends on bolt to pretighten is designed, and the axial and angular deviation can not be compensated because of the poor cushioning and damping performance. The structure using metal diaphragm group to absorb earthquake and middle section to buffer is designed. Secondly, ANSYS software is used to analyze the pretightening force and the relation between the pretension force and the maximum torque transfer, and the maximum stress value and the position produced in the torsion process are obtained. Furthermore, the influence of different pre-tightening taper and thickness on torque transfer is analyzed. According to the results of finite element analysis, the optimum design of pretightening structure is carried out, and the reasonable pretightening taper of bushing and the thickness of bushing are put forward. Thirdly, the finite element analysis is carried out on the diaphragm of the coupling under different working conditions, and the influence of axial deviation and angular deviation on the maximum stress is studied, and the maximum stress and the position of the diaphragm in the working process are obtained. The strength of the diaphragm is checked and the axial and angular deviations of the diaphragm are obtained when the stress reaches the yield limit of the material. Finally, using the fatigue analysis module in ANSYS, the fatigue life of the diaphragm is estimated, the service life of the diaphragm is predicted, and the influence of the angle deviation on the fatigue life is studied.
【學位授予單位】：華東理工大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH133.4

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本文編號：1896343