大型立式行星齿轮减速器传动系统的优化设计
发布时间：2019-03-02 19:23
【摘要】：行星齿轮传动系统是大型立式减速器的核心部件,其性能直接影响到整个系统的运作,设计过程中既要保证其传动的安全性,又要尽量的减小它的体积。因此如何合理的确定传动系统中各项参数的配置,一直是困扰设计人员的主要问题。现代的机械优化设计得益于其设计周期短,人力物力耗费较少等优点,已经被广泛应用在这项设计之中。 但是现行常用的优化设计往往考虑的设计变量和边界条件不够全面,如:漏掉了很多影响传动的因素,且将应力、强度等视为固定不变的值。这样无论在经济上还是在实用上都不会得到问题的最优解。鉴于以上因素,本文首先引入可靠性方面的理论重新构建了更为完整的多目标的优化数学模型,随后利用两种数学软件Matlab、Lingo,三种方法分别编程对模型进行求解,并将得到的轮系参数组合的新系统进行静态特性的对比分析,以确定最为合理的优化结果。 为确保系统有良好的动态性能,本文利用pro/e结合adams软件,建立实际的齿轮啮合模型进行运动学仿真,用以观察传动系统运行时齿轮的啮合,对比分析优化前后系统的动态啮合力特性。随后将整个传动系统等效为平移-扭转的弹簧-阻尼集中质量模型,并通过对其进行的模态分析,最终得到模型的固有频率和模态振型,以验证优化后的模型是否会发生共振。 行星传动需要行星架组件结构来支持,为保证行星架在优化后系统中的安全性,对其进行受力分析。在获得了行星架整体结构的应力场和位移场的情况下,观察到其结构设计趋于保守,所以利用Ansys建立其参数化有限元模型,并对其进行相应的优化设计,使得新的行星架组件即可以配合优化后的齿轮传动,又可以在满足自身的强度要求的前提下适当减重。 本文最终通过对齿轮系统参数和行星架组件参数的优化设计达到了在安全范围内降低整个传动系统成本的效果。
[Abstract]:Planetary gear transmission system is the core component of large-scale vertical reducer, its performance directly affects the operation of the whole system. In the design process, it is necessary to ensure the safety of the transmission and reduce its volume as much as possible. Therefore, how to reasonably determine the configuration of the parameters in the transmission system has always been a major problem for designers. Modern mechanical optimization design has been widely used in this design because of its short design cycle and low cost of manpower and material resources. However, the design variables and boundary conditions which are often considered in the current optimization design are not comprehensive, for example, a lot of factors affecting the transmission are omitted, and the stress and strength are regarded as fixed constant values. In this way, neither economic nor practical can obtain the optimal solution of the problem. In view of the above factors, this paper first introduces the reliability theory to re-construct a more complete multi-objective optimization mathematical model, and then uses two mathematical software Matlab,Lingo, three methods to solve the model separately. In order to determine the most reasonable optimization result, the static characteristics of the new system with the combination of gear train parameters are compared and analyzed in order to determine the most reasonable optimization results. In order to ensure the good dynamic performance of the system, this paper uses pro/e and adams software to establish the actual gear meshing model for kinematics simulation to observe the gear meshing when the transmission system is running. The characteristics of dynamic meshing force before and after optimization are compared and analyzed. Then the whole transmission system is equivalent to a translation-torsion spring-damping lumped mass model, and through modal analysis, the natural frequency and mode shape of the model are finally obtained to verify the resonance of the optimized model. Planetary transmission needs the support of planetary frame component structure. In order to ensure the safety of planetary rack in the optimized system, the force analysis of planetary rack is carried out. Under the condition of obtaining the stress field and displacement field of the whole structure of the planetary frame, it is observed that the structure design tends to be conservative, so the parametric finite element model of the planetary frame is established by using Ansys, and the corresponding optimization design is carried out. The new planetary rack assembly can not only match the optimized gear transmission, but also reduce the weight properly on the premise of satisfying its own strength requirements. In this paper, the optimal design of gear system parameters and planetary frame components parameters has achieved the effect of reducing the cost of the whole transmission system within the safe range.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.46
本文编号：2433385
[Abstract]:Planetary gear transmission system is the core component of large-scale vertical reducer, its performance directly affects the operation of the whole system. In the design process, it is necessary to ensure the safety of the transmission and reduce its volume as much as possible. Therefore, how to reasonably determine the configuration of the parameters in the transmission system has always been a major problem for designers. Modern mechanical optimization design has been widely used in this design because of its short design cycle and low cost of manpower and material resources. However, the design variables and boundary conditions which are often considered in the current optimization design are not comprehensive, for example, a lot of factors affecting the transmission are omitted, and the stress and strength are regarded as fixed constant values. In this way, neither economic nor practical can obtain the optimal solution of the problem. In view of the above factors, this paper first introduces the reliability theory to re-construct a more complete multi-objective optimization mathematical model, and then uses two mathematical software Matlab,Lingo, three methods to solve the model separately. In order to determine the most reasonable optimization result, the static characteristics of the new system with the combination of gear train parameters are compared and analyzed in order to determine the most reasonable optimization results. In order to ensure the good dynamic performance of the system, this paper uses pro/e and adams software to establish the actual gear meshing model for kinematics simulation to observe the gear meshing when the transmission system is running. The characteristics of dynamic meshing force before and after optimization are compared and analyzed. Then the whole transmission system is equivalent to a translation-torsion spring-damping lumped mass model, and through modal analysis, the natural frequency and mode shape of the model are finally obtained to verify the resonance of the optimized model. Planetary transmission needs the support of planetary frame component structure. In order to ensure the safety of planetary rack in the optimized system, the force analysis of planetary rack is carried out. Under the condition of obtaining the stress field and displacement field of the whole structure of the planetary frame, it is observed that the structure design tends to be conservative, so the parametric finite element model of the planetary frame is established by using Ansys, and the corresponding optimization design is carried out. The new planetary rack assembly can not only match the optimized gear transmission, but also reduce the weight properly on the premise of satisfying its own strength requirements. In this paper, the optimal design of gear system parameters and planetary frame components parameters has achieved the effect of reducing the cost of the whole transmission system within the safe range.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.46
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