新型无键式膜片联轴器的研制开发

发布时间：2018-05-16 09:38

本文选题：膜片联轴器 + 无键联接　；参考：《华东理工大学》2011年硕士论文

【摘要】：联轴器是用来联接不同机构中的两根轴(主动轴和从动轴)并使之共同旋转以传递扭矩的机械零件。常用的联轴器在使用过程中,存在缓冲性能差、不能补偿轴向和角向偏差、与轴脱开困难等问题。针对上述问题,本文设计开发了一种新型无键膜片式联轴器,并用有限元技术进行了应力分析和结构优化。主要研究内容如下：首先,针对键槽联接中存在与轴脱开不方便及应力集中的缺陷,设计了依靠螺栓进行预紧的锥面无键联接结构；针对缓冲减震性能差、不能补偿轴向和角向偏差的问题,设计了利用金属膜片组来吸震,和利用中间节进行缓冲的结构。其次,利用ANSYS软件分析了锥面无键联接中所需的预紧力,及预紧力与传递最大扭矩之间的关系,得到了扭转过程中衬套中产生的最大应力值及所产生的部位；并进一步分析了不同的预紧锥度和厚度对扭矩传递带来的影响。根据有限元分析结果,对预紧结构进行了优化设计,提出了合理的衬套预紧锥度和衬套厚度。第三,对联轴器膜片在不同工况下的受力情况进行了有限元分析,研究了轴向偏差和角向偏差对最大应力带来的影响；得到了膜片在工作过程中产生的最大应力及产生的部位,校核了膜片的强度,进一步得到了应力达到材料的屈服极限时,膜片所承受的轴向和角向偏差。最后,利用ANSYS中的疲劳分析模块,针对给定受力情况,对膜片进行了疲劳寿命估算,预测了膜片的使用寿命,研究了角向偏差对疲劳寿命带来的影响。
[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.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH133.4

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