闭环齿轮传动系统平稳性研究

发布时间：2018-07-23 16:01

【摘要】：在软管、电缆等产品的生产中,为使其具有较好的抗拉伸、抗弯折、抗冲击和耐磨损等性能,常在其壁内增加一层或数层的网状强化层,该网状强化层为网线相互交叉而成。为实现网线的相互交叉,常使用编织机进行编织。编织机的机械传动系统是设备的关键部分,改善其传动性能是提高编织机运动转速的重要途径之一。目前国内外编织机的机械传动系统大都是一套闭环齿轮传动系统,闭环齿轮传动系统共有n个齿轮,n≥4,且为偶数,n个齿轮两两相互啮合,并形成一个封闭的传动链。闭环齿轮传动系统的传动平稳性直接影响着编织机的传动效率和工作可靠性,因此闭环齿轮传动平稳性的研究具有重要的理论意义和实用价值。选取编织机的闭环齿轮传动系统为研究对象,研究的主要内容和结果为:(1)闭环齿轮传动系统是编织机主要的机械传动系统,传动误差对其传动平稳性有重要影响。利用当量啮合误差原理,建立闭环齿轮传动系统各齿轮共同作用时传动误差与时间的函数关系式,得出了闭环齿轮传动系统传动误差随时间的变化规律。利用蒙特卡罗法,验证了传动误差随时间的变化规律的正确性。依据闭环齿轮传动系统的角频率相同特性,研究各齿轮误差初始相位与齿轮传动误差的关系及两支路传动误差的同步性;构建同步传动误差和各齿轮传动误差之间的耦合模型,提出减小同步传动误差的措施。实例分析表明:该措施可以有效地提高闭环齿轮传动系统的传动平稳性。(2)闭环齿轮传动系统具有功率分流的传动特点,系统均载性能对其传动平稳性有着至关重要的作用。根据齿轮首位相接的结构特点,建立闭环齿轮传动系统弹性支撑条件下的静力学模型。依据系统功率流闭环的特点,给出系统的变形协调条件;结合力矩平衡方程和弹性支撑条件,推导出各支路传递的扭矩及系统均载系数的计算方法,得到系统偏心误差与均载系数之间的函数关系。利用控制变量法,分析了各位置的偏心误差对系统功率分流的影响规律,为科学的设计高速编织机的闭环齿轮传动系统提供理论基础。(3)根据其齿轮分布的结构特点,建立了啮合齿轮的传动方向角、啮合线方向角和啮合线夹角的计算通式。通过分析整个传动系统齿轮啮合线夹角的分布特点,研究了闭环齿轮传动系统齿轮轴的受载规律。实例分析表明:即使在无制造和安装误差的理想情况下,闭环齿轮传动系统仍然会出现载荷分配不均匀的现象,并且齿轮轴受载具有大小交替分布的规律。揭示了系统部分轴承易损坏的原因,该研究可为闭环齿轮传动系统的轴承选择和校核提供依据。本文选取编织机的闭环齿轮传动系统为研究对象,研究了系统的传动误差、均载性能和受力特性对闭环齿轮传动平稳性的影响。最终通过齿轮误差耦合的方法减小系统的同步传动误差;通过控制系统构件的偏心误差提高系统均载性能;根据系统受力特性规律,更加合理的的选用和校核不同位置的轴承从而提高系统的运转可靠性。本研究能为今后闭环齿轮传动系统的设计提供理论基础。
[Abstract]:In the production of hose, cable and other products, in order to make it have better tensile, bending, impact resistance and wear resistance, it often adds one or more layers of mesh reinforcement in its wall. The mesh reinforcement is intersected with the intersecting lines. In order to realize the intersecting of the wire, the knitting machine is often used to weave. The dynamic system is the key part of the equipment. Improving the transmission performance is one of the important ways to improve the speed of the knitting machine. At present, the mechanical transmission system of the knitting machine is mostly a closed loop gear transmission system. The closed loop gear transmission system has n gear, n more than 4, and even, n gear 22 meshes with each other, and forms a seal. Closed transmission chain. The transmission stability of closed loop gear transmission system directly affects the transmission efficiency and working reliability of the knitting machine. Therefore, the study of the stability of the closed loop gear transmission has important theoretical significance and practical value. The main contents and results of the study are as follows: (1) close study on the closed loop gear transmission system of the braiding machine. The ring gear transmission system is the main mechanical transmission system of the knitting machine, and the transmission error has an important influence on the stability of its transmission. By using the principle of equivalent meshing error, a function relation between the transmission error and the time is established when the gears of the closed loop gear transmission are combined with each other, and the change of the transmission error with the time of the closed gear transmission system is obtained. In accordance with the same characteristics of the angular frequency of the closed loop gear transmission system, the relationship between the initial phase of the gear error and the gear transmission error and the synchronism of the transmission error of the two branches are studied, and the synchronization between the synchronous transmission error and the gear transmission error is constructed. The coupling model puts forward measures to reduce the synchronous transmission error. The example analysis shows that this measure can effectively improve the transmission stability of the closed loop gear transmission system. (2) the closed-loop gear transmission system has the transmission characteristics of power diversion, and the performance of the system has a vital role in the transmission stability. The static model of the closed loop gear transmission system is established under the elastic support condition of the closed-loop gear transmission system. According to the characteristics of the system power flow closed loop, the deformation coordination condition of the system is given, and the calculation method of the torque and the system load coefficient of the system is derived by combining the moment balance equation and the elastic support condition, and the eccentricity error of the system is obtained. By using the control variable method, the effect of the eccentric error on the power diverting of the system is analyzed by using the control variable method, which provides the theoretical basis for the scientific design of the closed loop gear transmission system of high speed braiding machine. (3) according to the structure characteristics of the gear distribution, the transmission direction angle and meshing line of the meshing gear are established. A general formula of the angle between the direction angle and the meshing line is studied. By analyzing the distribution characteristics of the angle of the gear meshing line of the whole transmission system, the loading law of the gear shaft of the closed loop gear transmission system is studied. The case analysis shows that the closed loop gear transmission system will still have the uneven load distribution even in the ideal case of no manufacturing and installation error. The reason for the easy damage of the part bearing of the system is revealed. This study can provide the basis for the bearing selection and check of the closed loop gear drive system. This paper selects the closed loop gear transmission system of the knitting machine as the research object, and studies the transmission error, the load average performance and the performance of the system. The influence of the force characteristic on the stability of the closed loop gear transmission. Finally, the synchronization transmission error of the system is reduced by the method of gear error coupling, and the average load performance of the system is improved by controlling the eccentric error of the system component, and the system is improved by selecting and checking the bearings in different positions more reasonably according to the law of the force characteristic of the system. This study can provide a theoretical basis for the design of closed loop gear transmission system in the future.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH132.41

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