Comparative Analysis of Strength and Test of Nodular Cast Iron and Aluminum Alloy Boxes for Metro Gearboxes

Hu Zhiqiang; Zhao Yuanyuan; Li Xi

doi:10.16578/j.issn.1004.2539.2023.09.015

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Comparative Analysis of Strength and Test of Nodular Cast Iron and Aluminum Alloy Boxes for Metro Gearboxes

Test·Analysis | 更新时间：2023-09-18

- Comparative Analysis of Strength and Test of Nodular Cast Iron and Aluminum Alloy Boxes for Metro Gearboxes
- Journal of Mechanical Transmission Vol. 47, Issue 9, Pages: 103-114(2023)
- 作者机构：
  
  北京市地铁运营有限公司，北京 100044
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2023.09.015
  CLC：
- Published：15 September 2023，
  
  Received：14 March 2023，
  
  Revised：31 March 2023，
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胡志强,赵媛媛,李熙.地铁齿轮箱球墨铸铁和铝合金箱体强度及试验对比分析[J].机械传动,2023,47(09):103-114.

Hu Zhiqiang,Zhao Yuanyuan,Li Xi.Comparative Analysis of Strength and Test of Nodular Cast Iron and Aluminum Alloy Boxes for Metro Gearboxes[J].Journal of Mechanical Transmission,2023,47(09):103-114.
胡志强,赵媛媛,李熙.地铁齿轮箱球墨铸铁和铝合金箱体强度及试验对比分析[J].机械传动,2023,47(09):103-114. DOI： 10.16578/j.issn.1004.2539.2023.09.015.

Hu Zhiqiang,Zhao Yuanyuan,Li Xi.Comparative Analysis of Strength and Test of Nodular Cast Iron and Aluminum Alloy Boxes for Metro Gearboxes[J].Journal of Mechanical Transmission,2023,47(09):103-114. DOI： 10.16578/j.issn.1004.2539.2023.09.015.

摘要

针对中国标准地铁120B车型齿轮箱箱体，建立了有限元仿真模型，利用有限元法分别对铝合金和球墨铸铁箱体进行了疲劳强度、静强度、安全鼻强度计算；通过对比分析，得出各工况下铝合金箱体最大等效应力均大于球墨铸铁箱体，差值最大比例为36.3%；对铝合金和球墨铸铁箱体进行了静强度和型式试验的对比，结果表明，铝合金箱体的最大应力大于球墨铸铁箱体，差值比例为8.3%，铝合金箱体的最大声功率和振动值均不小于球墨铸铁箱体，但轴承平均温度下降10 ℃左右；尽管铝合金箱体强度弱于球墨铸铁箱体，但整体安全系数较高，仍能满足使用寿命33年或960万千米的要求。对铝合金箱体的适用性进行分析可知，球墨铸铁和铝合金均可以用于地铁齿轮箱，两种材料各有优劣，在设计时可根据车辆具体要求进行优先偏向选择。

Abstract

A finite element simulation model is established for the gearbox body of 120B metro vehicle model in China. The fatigue strength

static strength and safe nose strength of aluminum alloy and nodular cast iron gearbox are calculated by the finite element method. The results show that the maximum equivalent stress of aluminum alloy case is larger than that of nodular cast iron

and the maximum difference ratio is 36.3%. The static strength and type test of aluminum alloy and nodular cast iron box are compared. The results show that the maximum stress of aluminum alloy case is greater than that of the ductile iron

and the difference ratio is 8.3%. The maximum sound power and vibration value of the aluminum alloy case are greater than that of the nodular cast iron case

but the average bearing temperature decreases by about 10 ℃. Although the strength of the aluminum alloy case is weaker than that of the nodular cast iron case

the overall factor of safety of the aluminum alloy case is higher than that of the nodular cast iron case

which can still meet the service life of 33 years or 9.6 million kilometers requirements. In this study

the applicability of aluminum alloy box is analyzed. The results show that both the aluminum ductile iron and the aluminum alloy can be used in metro gearboxes; both materials have their own advantages and disadvantages

and priority selection can be made during design based on the specific requirements of the vehicle.

关键词

标准地铁箱体仿真计算试验轻量化

Keywords

Standard metroCaseSimulation calculationTestLightweight

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