斗轮堆取料机行走机构力学性能分析及结构优化

发布时间：2018-03-07 03:19

本文选题：斗轮堆取料机　切入点：行走机构　出处：《中南大学》2011年硕士论文　论文类型：学位论文

【摘要】：斗轮堆取料机是一种广泛应用于港口、电力、煤炭、冶金等行业的大型散料输送设备。斗轮堆取料机行走机构由多组结构相同的行走台车组成,行走机构处于整台机器的最下部,起着支撑整台机器和机器的行走作用,其安全性与可靠性对整台机器的安全运行起着至关重要的作用。本文以DQL1000/1500.30斗轮堆取料机的行走机构为研究对象,针对斗轮堆取料机行走机构电机功率传统计算采用经验公式方法的不足,对行走机构电机功率进行现场实测,通过实测值与理论计算值比较,找出了行走机构所需电机功率的理论计算修正方法；针对斗轮堆取料机行走机构传统设计中如许用应力的取值界限、设计、制造水平、材质、零部件的重要程度等因素没有考虑,建立行走驱动齿轮模糊优化的数学模型,结合MATLAB遗传算法工具箱进行寻优计算,研究结果表明,减小齿轮中心距和齿宽,可节约材料和制造成本；斗轮堆取料机传统设计凭借经验设计时过于强调安全性,造成尺寸偏大,且不易发现产品中的薄弱环节等,对主动台车架进行强度与刚度分析,发现半圆铰附近的板应力值偏大且超过许用应力值,存在安全隐患,而其余地方的应力值很小,强度值有很大的富裕；据此对主动台车架进行结构优化,使其应力分布更合理,最大应力、应变值都减小并满足使用要求,且重量减轻22%；对优化后的主动台车架进行了模态分析,讨论了主动台车架运行的稳定性；对主动台车架进行了应力测试,表明研究设计的主动台车架结构强度满足要求,并验证了有限元模型的正确性。
[Abstract]:Bucket wheel stacker is a kind of large bulk conveying equipment widely used in port, electric power, coal, metallurgy and other industries. The walking mechanism of bucket wheel stacker is composed of many groups of walking trolleys with the same structure. The walking mechanism is located at the bottom of the whole machine and plays the role of supporting the whole machine and the walking of the machine. Its safety and reliability play a vital role in the safe operation of the whole machine. In this paper, the walking mechanism of DQL1000/1500.30 bucket wheel stacker is taken as the research object. Aiming at the shortcoming of the traditional calculation method of the motor power of the bucket wheel stacker, the field measurement of the motor power of the walking mechanism is carried out. By comparing the measured value with the theoretical calculation value, this paper finds out the theoretical calculation and correction method of the motor power needed by the walking mechanism, aiming at the limit of the value of the stress used in the traditional design of the walking mechanism of the bucket wheel stacker, the design, the manufacturing level and the material quality, The important degree of components and other factors were not taken into account. The mathematical model of fuzzy optimization of traveling driving gear was established, and the optimization calculation was carried out by combining with MATLAB genetic algorithm toolbox. The research results show that the gear center distance and tooth width are reduced. The traditional design of bucket wheel stacker with experience emphasizes too much on safety, causes the size to be too large, and is not easy to find the weak links in the product, so the strength and rigidity of the active platform frame are analyzed. It is found that the stress value of the plate near the semi-circular hinge is too large and exceeds the allowable stress value, so there is a hidden danger of safety, while the stress value in the rest of the place is very small and the strength value is very rich, so that the structure of the active platform frame is optimized to make its stress distribution more reasonable. The maximum stress and strain value are reduced and meet the requirements of use, and the weight is reduced by 22. Modal analysis of the optimized active platform frame is carried out, the stability of the active platform frame is discussed, and the stress test of the active platform frame is carried out. The results show that the structural strength of the active platform frame can meet the requirements and verify the correctness of the finite element model.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH237

【引证文献】