JS40矿用减速器的优化及可靠性分析
发布时间：2018-07-23 11:21
【摘要】：齿轮箱是煤炭矿井必不可少的配套设备,担负着煤炭、材料等动力传输的重要任务。煤矿所使用国产的减速器结构已不尽合理,减速器齿轮传动比的分配,对减速器的结构、体积和重量,以及工作性能具有显著的影响,优化设计的关键在于满足强度指标实现减速器轻量化的同时提高其可靠性。本文根据齿轮箱系统配比的方法,建立齿轮传动系统的优化设计模型。煤矿用减速器在井下的运转条件极其恶劣,安装维护困难,在这种工况条件下,齿轮箱报废周期短,齿轮箱的可靠性直接影响生产、经济和人身安全的问题。由于齿轮产品不具备大样本试验的条件,所面临的可靠性分析问题非常突出,因此需要迫切提高齿轮箱的可靠性。本文基于蒙特卡洛法对齿轮的疲劳强度进行可靠性分析,解决了齿轮可靠性分析的疲劳寿命试验数据不足的问题,为可靠性分析奠定了一定的理论基础。1基于等强度、等润滑条件对减速器传动系统进行优化,本文将弧齿锥齿轮同圆柱齿轮分开优化,锥齿轮的参数选择从小齿轮强度、大齿轮直径、传动比三个限制条件进行优化设计。圆柱齿轮优化采用逐步优化的方法,即两级圆柱齿轮一次接触强度优化和再次综合优化设计的方法。第一步优化确定模数;第二步优化,引进变位系数、齿形系数、弯曲强度完成综合优化计算。这种方法能够较好地满足齿轮传动的润滑条件、强度、寿命的设计要求。2基于齿轮强度计算标准及应力-强度干涉模型,本文建立齿轮的弯曲疲劳、接触疲劳、胶合的可靠度计算模型。本文用蒙特卡洛法产生随机数对齿轮的接触强度、弯曲强度和胶合的可靠度进行计算,并模拟出计算应力和许用应力的分布类型,齿轮计算弯曲应力服从正态分布,许用弯曲应力服从对数正态分布;齿轮计算接触应力服从正态分布,许用接触应力服从对数正态分布。最后,采用串联系统的可靠性模型计算系统可靠度,与多模式失效相关理论计算出的系统可靠度进行对比,两者非常接近,从而验证了蒙特卡洛法计算的准确性。3本文在对齿轮几何设计、强度计算、可靠性分析理论研究的基础上,基于MATLAB编程工具,开发了齿轮几何参数计算与可靠性分析程序,并用实例验证优化设计参数的正确性。本文设置人性化交互界面,节省时间,使计算效率大大提高。
[Abstract]:Gearbox is an indispensable supporting equipment in coal mine, which shoulders the important task of power transmission such as coal and materials. The structure of domestic reducer used in coal mine has been unreasonable. The distribution of gear transmission ratio of reducer has a significant effect on the structure, volume and weight of reducer, as well as its working performance. The key of optimal design is to meet the intensity index to realize the lightening of the reducer and to improve its reliability. In this paper, the optimal design model of gear transmission system is established according to the method of gearbox system ratio. The working condition of the reducer used in coal mine is extremely bad and the installation and maintenance are difficult. Under this condition, the cycle of the gear box is short, and the reliability of the gear box has a direct impact on the production, economy and personal safety. Because the gear product does not have the condition of large sample test and the reliability analysis problem is very prominent, it is urgent to improve the reliability of the gear box. In this paper, the reliability analysis of gear fatigue strength based on Monte Carlo method is carried out, which solves the problem of insufficient fatigue life test data of gear reliability analysis, and lays a certain theoretical foundation for reliability analysis based on equal strength. In this paper, the arc bevel gear is optimized separately from the cylindrical gear, and the parameters of the bevel gear are optimized by three limiting conditions: small gear strength, large gear diameter and transmission ratio. The method of step by step optimization is adopted in the optimization of cylindrical gears, that is, the optimization of the primary contact strength of two-stage cylindrical gears and the re-comprehensive optimization design. The first step optimizes the determination of modulus, the second step optimizes the introduction of displacement coefficient, tooth shape coefficient and bending strength to complete the comprehensive optimization calculation. This method can satisfy the lubrication conditions of gear transmission, strength and life design requirements .2 based on gear strength calculation standard and stress-strength interference model, this paper establishes the bending fatigue and contact fatigue of gear. The reliability calculation model of gluing. In this paper, Monte Carlo method is used to generate random numbers to calculate the contact strength, bending strength and reliability of gluing of gears, and the distribution types of calculated stress and allowable stress are simulated. The allowable bending stress suit is logarithmic normal distribution, the gear contact stress suit is normal distribution, and the allowable contact stress suit is logarithmic normal distribution. Finally, the reliability model of series system is used to calculate the reliability of the system, and the reliability of the system is compared with that calculated by the theory of multi-mode failure correlation. The two models are very close to each other. Therefore, the accuracy of Monte Carlo method is verified. 3. Based on the theoretical research of gear geometry design, strength calculation and reliability analysis, and based on MATLAB programming tool, a gear geometric parameter calculation and reliability analysis program is developed in this paper. An example is given to verify the correctness of the optimized design parameters. This article sets the humanized interactive interface, saves the time, causes the computation efficiency to raise greatly.
【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】：TD402
本文编号：2139242
[Abstract]:Gearbox is an indispensable supporting equipment in coal mine, which shoulders the important task of power transmission such as coal and materials. The structure of domestic reducer used in coal mine has been unreasonable. The distribution of gear transmission ratio of reducer has a significant effect on the structure, volume and weight of reducer, as well as its working performance. The key of optimal design is to meet the intensity index to realize the lightening of the reducer and to improve its reliability. In this paper, the optimal design model of gear transmission system is established according to the method of gearbox system ratio. The working condition of the reducer used in coal mine is extremely bad and the installation and maintenance are difficult. Under this condition, the cycle of the gear box is short, and the reliability of the gear box has a direct impact on the production, economy and personal safety. Because the gear product does not have the condition of large sample test and the reliability analysis problem is very prominent, it is urgent to improve the reliability of the gear box. In this paper, the reliability analysis of gear fatigue strength based on Monte Carlo method is carried out, which solves the problem of insufficient fatigue life test data of gear reliability analysis, and lays a certain theoretical foundation for reliability analysis based on equal strength. In this paper, the arc bevel gear is optimized separately from the cylindrical gear, and the parameters of the bevel gear are optimized by three limiting conditions: small gear strength, large gear diameter and transmission ratio. The method of step by step optimization is adopted in the optimization of cylindrical gears, that is, the optimization of the primary contact strength of two-stage cylindrical gears and the re-comprehensive optimization design. The first step optimizes the determination of modulus, the second step optimizes the introduction of displacement coefficient, tooth shape coefficient and bending strength to complete the comprehensive optimization calculation. This method can satisfy the lubrication conditions of gear transmission, strength and life design requirements .2 based on gear strength calculation standard and stress-strength interference model, this paper establishes the bending fatigue and contact fatigue of gear. The reliability calculation model of gluing. In this paper, Monte Carlo method is used to generate random numbers to calculate the contact strength, bending strength and reliability of gluing of gears, and the distribution types of calculated stress and allowable stress are simulated. The allowable bending stress suit is logarithmic normal distribution, the gear contact stress suit is normal distribution, and the allowable contact stress suit is logarithmic normal distribution. Finally, the reliability model of series system is used to calculate the reliability of the system, and the reliability of the system is compared with that calculated by the theory of multi-mode failure correlation. The two models are very close to each other. Therefore, the accuracy of Monte Carlo method is verified. 3. Based on the theoretical research of gear geometry design, strength calculation and reliability analysis, and based on MATLAB programming tool, a gear geometric parameter calculation and reliability analysis program is developed in this paper. An example is given to verify the correctness of the optimized design parameters. This article sets the humanized interactive interface, saves the time, causes the computation efficiency to raise greatly.
【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】：TD402
【参考文献】
相关期刊论文 前7条
1 熊峻江,刘宝成,高宏;系统安全性分析与设计方法研究[J];北京航空航天大学学报;2002年02期
2 喻天翔,孙玉秋,张祖明;多模式失效的机械零件可靠度计算新理论[J];机械工程学报;2003年03期
3 周金宇;谢里阳;钱文学;;载荷相关结构系统的可靠性分析[J];机械工程学报;2008年05期
4 王正;康锐;谢里阳;;以载荷作用次数为寿命指标的失效相关系统可靠性建模[J];机械工程学报;2010年06期
5 王旭亮;聂宏;;考虑不同载荷顺序下应力损伤模糊性的Miner法则(英文)[J];Transactions of Nanjing University of Aeronautics & Astronautics;2008年03期
6 魏冰阳;周贺;陈金瑞;;一种弧齿锥齿轮行星传动齿轮箱体的模态分析[J];河南科技大学学报(自然科学版);2013年01期
7 ;Grey Relation between Nonlinear Characteristic and Dynamic Uncertainty of Rolling Bearing Friction Torque[J];Chinese Journal of Mechanical Engineering;2009年02期
相关硕士学位论文 前1条
1 李科;基于UG人字形齿轮参数化设计及动力学仿真[D];河北科技大学;2013年
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