煤矿输运机减速器斜齿圆柱齿轮的动态修形

发布时间：2018-09-06 14:40

【摘要】：大量研究表明:合理的齿轮修形在一定程度上可以补偿因轮齿受载产生的误差,减小啮合冲击降低振动噪声,改善轮齿载荷分布,提高齿轮受载能力,提高齿轮运行的平稳性和可靠性。因此,在不改变齿轮基本参数的情况下,对斜齿轮进行适当修形是减少冲击,降低振动噪声改善齿轮传动性能的良策。然而当采取的齿轮修形方式、修形参数不合适时,会使齿轮的传动性能恶化。本文以某型煤矿输运机减速器中的一对变位斜齿轮副为具体研究对象,应用有限元思想,结合有限元接触分析及动态仿真,能够直观准确地完成了齿轮修形方案的确定及试验验证。主要完成了以下工作:1根据斜齿轮的几何尺寸计算公式,推导出其渐开线方程、螺旋线方程,并在三维绘图软件Pro/E中,使用更精确的轮齿建模方法—混合扫描法建立轮齿模型,进而建立了精确的斜齿轮参数化三维模型。然后对斜齿轮副进行虚拟无干涉装配。2应用有限元分析软件ANSYS Workbench对斜齿轮进行接触分析。根据齿轮传动的啮合特性与齿廓修形原理,结合有限元接触分析结果得出轮齿弹性变形量以确定齿廓修形量,进而根据实际工况确定合适的修形曲线及修形长度。对常用的齿向修形方法进行研究,结合本文的研究对象选择了加工方法简单、且修形效果较好的鼓形修形。从加工成本、效果等方面综合考虑仅对小齿轮进行鼓形修形。3在动态仿真软件ADAMS中对修形前与修形后的斜齿轮副进行动态啮合仿真,所得结果验证了本文的修形方案有效降低了齿轮啮合过程中最大啮合力,减小啮合冲击,使斜齿轮副的可靠性、平稳性得到提高。4分析研究斜齿轮的修形加工方法,并推导出了相应的加工参数关系式,对斜齿轮进行修形加工。5搭建减速器振动噪声试验平台,对未修形、修形斜齿轮副进行振动噪声试验。本文的振动噪声试验验证了结合齿轮的具体工况,应用有限元法确定的齿轮修形,能够有效地降低振动噪声,提高齿轮的动态性能。
[Abstract]:A large number of studies show that reasonable gear modification can compensate the error caused by gear tooth load to a certain extent, reduce meshing impact, reduce vibration noise, improve gear tooth load distribution and increase gear load capacity. Improve the stability and reliability of gear operation. Therefore, without changing the basic parameters of the gear, the proper modification of the helical gear shape is a good way to reduce the impact and reduce the vibration noise to improve the transmission performance of the gear. However, the gear transmission performance will deteriorate when the modification parameters are not suitable. In this paper, a pair of modified helical gear pairs in the reducer of a coal mine conveyer is taken as the specific research object, and the finite element method is applied to the contact analysis and dynamic simulation. The gear modification scheme can be confirmed and verified directly and accurately. The following work has been accomplished: 1. According to the calculation formula of helical gear geometry dimension, the involute equation and helical equation are derived. In the 3D drawing software Pro/E, a more accurate modeling method of gear tooth, hybrid scanning method, is used to establish the gear tooth model. Furthermore, an accurate parameterized three-dimensional model of helical gear is established. Then virtual non-interference assembly of helical gear pair is carried out. 2. Contact analysis of helical gear is carried out by using finite element analysis software ANSYS Workbench. According to the meshing characteristic of gear transmission and the modification principle of tooth profile, the elastic deformation of gear tooth is obtained according to the results of finite element contact analysis, and the suitable modification curve and modification length are determined according to the actual working conditions. The common tooth modification method is studied, and the drum shape modification with simple processing method and better modification effect is selected in combination with the research object in this paper. From the aspects of machining cost and effect, only the drum shape modification of pinion gear is considered in the dynamic simulation software ADAMS, and the dynamic meshing simulation of the helical gear pair before and after modification is carried out. The results show that the proposed modification scheme can effectively reduce the maximum meshing force, reduce the meshing impact, improve the reliability and stability of the helical gear pair, and improve the reliability and smoothness of the helical gear pair. The corresponding formula of machining parameters is deduced, and the vibration and noise test platform of gear reducer is set up. The vibration and noise test of unmodified and modified helical gear pair is carried out. The vibration and noise test in this paper proves that the gear shape modification determined by finite element method can effectively reduce the vibration noise and improve the dynamic performance of the gear.
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD50

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