板链斗式提升机链板的疲劳寿命研究

设备设计/诊断维修/再制造现代制造工程(Modern Manufacturing Engineering)2018年第6期

板链斗式提升机链板的疲劳寿命研究*

韩变枝1,杨胜强2,韩海燕3

(1山西工程技术学院,阳泉045000;2太原理工大学机械工程学院,太原030024;

3阳泉煤业集团股份有限公司,阳泉045000)

摘要:链条是NSE型提升机的核心部件,其断裂失效给用户带来较大的生产成本和安全隐患,研究提高链条使用寿命的方法和措施具有重要的意义。针对链条的失效形式,分析其失效原因,采用有限元分析方法对链条结构进行静力分析,验证链条的结构设计满足静强度要求,计算零件S-N曲线,进一步分析疲劳寿命,得出疲劳破坏是链条内链板断裂失效的主要原因。疲劳寿命分析结果与生产实际中内链板平均使用寿命非常接近,表明疲劳仿真分析结果是有效的,并从制造工艺和使用方面提出相应的改进措施。改进后,在实际应用中链条的使用寿命显著提高,因此,在客观上无法进行试验研究时,可以借助疲劳仿真分析的手段较为准确地模拟零件的疲劳寿命试验。

关键词:链板;有限元方法;疲劳寿命分析

中图分类号:TH933.1 文献标志码:A文章编号:1671-3133(2018)06-0137-05

DOI:10.16731/https://www.360docs.net/doc/909482211.html,ki.1671-3133.2018.06.025

Studiesoffatiguelifeonchainplateofplatechainhopperhoistingmachine

Han Bianzhi1,Yang Shengqiang2,Han Haiyan3

(1Shanxi Institute of Technology,Yangquan045000,Shanxi,China;

2College of Mechanical Engineering,Taiyuan University of Technology,Taiyuan030024,China;

3Yangquan Coal Industry Group Co.Ltd.,Yangquan045000,Shanxi,China)

Abstract:The chain is the core component of NSE elevator.The chain fracture brings to users the larger production costs and safety concerns.It is of great importance to improve the service life of the chain by research the measures and methods.In view of the chain failure modes,to analyze the failure reasons,the chain structure had been analyzed by finite method on the static strength analysis.It was proved the structure design of the chain satisfies the requirement of static strength.The S-N curve of the parts was calculated,The fatigue life of the chain was analyzed further,It is concluded that the main causes of failure is fatigue damage on the chain.The fatigue analysis results are very close with the average service life of chain plate in the actual produc-tion,it was showed that the fatigue simulation is effective,and the corresponding improvement measures was put forward from the aspects of manufacture process and use.After the implementation of improvement measures,the service life of the chain has in-creased dramatically in practice.Therefore,when the experimental research is not carry out objectively,it is feasible to obtain more accurate simulation of the fatigue life test by fatigue analysis for the parts.

Keywords:chain plate;ANSYS;fatigue life analysis

0 引言

某厂生产的提升机大部分用于水泥生产工厂的物料提升与运输,主要有NE和NSE两种类型。NSE 型为高速板链斗式提升机,该设备提升能力大,提升量为100~1000t/h,提升速度为45~65m/min,在额定输送量下,最大提升高度超过40m。NSE型提升机的核心部件是链条,主要采用高强度滚子链,提升机示意图见图1。在实际应用中,内链板经常发生断裂失效的现象,其平均使用寿命为10个月左右,给生产带来较大影响,给企业带来较大的经济损失。针对这种情况,设备生产厂家从工作制度、提升重量、链板材质、加工工艺、热处理以及装配等方面进行了积极的探索和改进,但是从理论上分析其失效原因较困难,

731

*山西省教育厅科技研究开发项目(20141116)万方数据

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