重型变速器行星齿轮机构设计

发布时间：2018-06-20 22:01

本文选题：行星机构 + 齿轮计算　；参考：《吉林大学》2012年硕士论文

【摘要】：在市场需求发生重大变化的背景下，重型变速器产品副箱使用行星结构已成为发展趋势。为了顺应市场的发展这一形势，我公司的行星机构变速箱也在紧锣密鼓的开发，适应市场需求。行星齿轮机构后副箱具有结构紧凑、承载能力大、传动效率高、传动速比大、性能可靠等显著的优点，行星齿轮机构后副箱作为重型商用车变速器重要的组成部分之一，承载能力大小，结构设计是否合理都将直接影响变速器整体的可靠性。因此，对后副箱行星齿轮机构的技术进行深入研究，掌握行星机构的设计及计算方法，，对提升公司产品的核心竞争力有重要的意义。由于行星机构的结构复杂，设计计算困难，因此本文对变速箱行星机构简化成太阳轮与行星轮、行星轮与大齿圈两对啮合副进行计算，讨论了安装条件、同心条件、邻接条件等行星机构齿轮齿数应该满足的条件，根据设定的开发目标，根据速比设定目标，进行配齿计算，计算出中心距，然后进行配齿计算、齿轮几何参数计算、齿轮强度计算，根据确定的齿轮参数进行配齿验算。在满足使用要求的情况下，对载荷谱的收集和确定制定了方法。利用常规路面按比例采集方案及采用计数法进行数据处理，确定了载荷谱，通过台架测试，获取齿轮破损或未破损数据，最终确定出我公司特有的S-N曲线。通过台架试，根据载荷谱、S-N曲线对齿轮强度进行了校核，设计安全率1以上，符合设计目标。对行星机构关键零件太阳轮、行星轮、行星架和大齿圈结构进行了探讨，对市场上现有变速器行星机构的结构进行了调查，分析其优缺点，选择了便于加工、能够保证性能的结构。最后根据循环次数对试验条件进行制定，通过疲劳试验试验验证，确定行星机构设计满足开发目标。本文还对变速器副箱行星机构的开发对开发流程进行了梳理。首先对竞品分析，制定开发目标及寿命目标，在行星机构设计中根据速比进行配齿计算，确定中心距，进行参数计算及配齿验算，并对行星机构齿轮寿命的标准制定的方法进行的探讨和总结。最后根据设计寿命目标，制定疲劳试验大纲，验证设计能够达到使用目标。对于行星机构变速器开发流程及设计计算进行了一定程度的总结，具有一定指导意义。
[Abstract]:Under the background of great changes in market demand, the use of planetary structure in the secondary box of heavy-duty transmission products has become a development trend. In order to adapt to the development of the market, our company's planetary gearbox is also in intensive development to meet the needs of the market. The rear auxiliary box of planetary gear mechanism has many advantages, such as compact structure, large bearing capacity, high transmission efficiency, large transmission speed ratio, reliable performance and so on. As one of the important parts of heavy commercial vehicle transmission, the rear auxiliary box of planetary gear mechanism is one of the most important parts. Bearing capacity and structural design will directly affect the reliability of the transmission as a whole. Therefore, it is of great significance to study the technology of the planetary gear mechanism of the rear auxiliary box and to master the design and calculation methods of the planetary mechanism to enhance the core competitiveness of the company's products. Because the structure of the planetary mechanism is complex and the design and calculation are difficult, the gearbox planetary mechanism is simplified into two pairs of meshing pairs: solar wheel and planetary wheel, planetary gear and large gear ring, and the installation conditions and concentric conditions are discussed. According to the set development target, according to the speed ratio setting target, the tooth matching calculation is carried out, the center distance is calculated, then the tooth matching calculation is carried out, and the gear geometric parameters are calculated. Gear strength calculation, according to the determination of gear parameters for gear matching calculation. The method of collection and determination of load spectrum is developed under the condition of satisfying the requirement of application. The load spectrum is determined by using the routine pavement proportional collection scheme and the counting method, and the data of gear breakage or non-breakage are obtained by bench test. Finally, the unique S-N curve of our company is determined. According to the load spectrum S-N curve, the gear strength is checked through the bench test. The design safety rate is more than 1, which accords with the design goal. The structure of solar wheel, planetary rack and large gear ring, the key parts of planetary mechanism, are discussed. The structure of planetary mechanism of transmission in the market is investigated, and its advantages and disadvantages are analyzed. Structure that ensures performance. Finally, the test conditions are determined according to the cycle times, and the design of the planetary mechanism is determined to meet the development goal through fatigue test. This paper also combs the development process of the planetary mechanism of transmission sub-box. First of all, the paper analyzes the competitive products, formulates the development goal and life target, calculates the gear matching according to the speed ratio in the planetary mechanism design, determines the center distance, calculates the parameters and the tooth matching checking calculation. The method of establishing the standard of gear life of planetary mechanism is discussed and summarized. Finally, according to the design life goal, the fatigue test outline is developed to verify that the design can achieve the purpose. This paper summarizes the development process and design calculation of planetary transmission to a certain extent and has certain guiding significance.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：U463.212;TH132.46

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