PREDICTION OF FLAT RING FATIGUE LIFE OF SCRAPER CHAIN BASED ON TEST DATA

MAO Jun; WANG HongTao; XIE Miao; ZHENG Wei

doi:10.16579/j.issn.1001.9669.2019.04.031

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PREDICTION OF FLAT RING FATIGUE LIFE OF SCRAPER CHAIN BASED ON TEST DATA

更新时间：2022-09-22

- PREDICTION OF FLAT RING FATIGUE LIFE OF SCRAPER CHAIN BASED ON TEST DATA
- Journal of Mechanical Strength Vol. 41, Issue 4, Pages: 964-970(2019)
- 作者机构：
  
  1. 辽宁工程技术大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.04.031
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MAO Jun, WANG HongTao, XIE Miao, et al. PREDICTION OF FLAT RING FATIGUE LIFE OF SCRAPER CHAIN BASED ON TEST DATA. [J]. 41(4):964-970(2019)
DOI：

MAO Jun, WANG HongTao, XIE Miao, et al. PREDICTION OF FLAT RING FATIGUE LIFE OF SCRAPER CHAIN BASED ON TEST DATA. [J]. 41(4):964-970(2019) DOI： 10.16579/j.issn.1001.9669.2019.04.031.

摘要

为防止刮板输送机链条平环疲劳失效而引起断链事故发生,文章基于现场试验数据对链条平环疲劳寿命进行预测。以38 mm×137 mm C级型号链环为研究对象,首先对刮板输送机运行过程中链条平环张力变化进行在线监测,测得同一平环的两条直边张力出现明显不均等现象,分别获得两份张力载荷谱作为仿真时载荷数据;然后利用有限元软件对链条平环两条直角边施加不均等载荷进行强度分析,得到链环应力及应变结果云图,找出薄弱关键点;最后基于静强度分析结果,施加经处理后的载荷数据,利用疲劳分析软件Ansys nCode DesignLife对平环进行疲劳寿命仿真分析,仿真结果表明刮板输送机链条平环疲劳寿命为30 750次循环,链轮链环啮合61 500次。寿命结论可为以后刮板链环定期维修、更换、结构优化提供重要参考。

Abstract

In order to prevent the failure of chain flat ring fatigue failure of scraper conveyor chain, the paper based on the field test data to predict the fatigue life of the chain. Taking the 38 × 137 mmC grade chain as the research object, firstly, the tension of the flat ring is monitored on-line during the operation of the scraper conveyor, and the two straight edges of the same flat ring are obviously unequal. The tension load spectrum as the simulation load data;Then, the finite element software is used to analyze the unequal load on the two right angles of the chain flat ring. The stress and strain results are obtained, and the weak key points are found.Finally, based on the results of static strength analysis, the fatigue load of flat ring was simulated by ANSYS nCode DesignLife.The simulation results show that the fatigue life of the flat ring of the scraper conveyor is 30750 cycles, and the chain link is 61500 times.The life conclusion can provide important reference for the later maintenance, replacement and structural optimization of the scraper chain.

关键词

刮板输送机疲劳失效断链疲劳寿命

Keywords

Scraper conveyorFatigue failureBroken chainFatigue life

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