高速土工离心机转臂设计与研究

许元恒; 冉光斌; 陈红永

doi:10.11779/CJGE2022S2014

高速土工离心机转臂设计与研究 English Version

中国工程物理研究院总体工程研究所, 四川绵阳 621999

详细信息

作者简介:
许元恒(1989—)，男，硕士，工程师，主要从事离心机结构设计。E-mail: xuyuanheng@foxmail.com

中图分类号: TH122, TU41
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出版历程
- 收稿日期: 2022-12-07
- 网络出版日期: 2023-03-26
- 刊出日期: 2022-11-30

Study and design of rotary arm of geotechnical centrifuge with high speed

Institute of System Engineering, CAEP, Mianyang 621999, China

摘要

摘要: 转臂是高速土工离心机承载的关键部件，现有集成式转臂所能达到的离心加速度有限，而采用整体锻造加工、兜装方式负载的整体式转臂则可实现高离心加速度设计。根据整体式转臂的结构特点，将其分为主臂段和兜装段进行针对性设计，主臂段采用变截面等强度设计，兜装段则分别对兜装根部的圆角和兜装梁的轻量化进行了对比设计。采用有限元分析方法对设计结果进行分析校核，结果表明，在离心加速度1700.4g下该转臂最大应力小于450 MPa，安全系数大于2，该转臂所能承受离心加速度远超现有水平，对实际工程有参考意义。
- 土工离心机 /
- 转臂 /
- 变截面 /
- 优化设计
Abstract: The rotary arm is the key component of geotechnical centrifuge to support loads. The centrifugal acceleration of the assembly rotary arm is limited. The high acceleration design of the rotary arm can be realized by using the whole forging process and carrying loads. According to its structural characteristics, the integral rotary arm is divided into the main arm section and the pocket section. The main arm section is designed with variable cross-section and equal strength. For the pocket section, the lightweight design of the fillet at the pocket root and the pocket beam is compared respectively. The finite element analysis method is used to analyze the design results. The results show that the maximum stress of the rotary arm is less than 450 MPa and the safety factor is greater than 2 at 1700.4g. The acceleration of rotary arm exceeds the level of the existing centrifuge, which is of reference significance for practical engineering.
- geotechnical centrifuge /
- rotary arm /
- variable cross-section /
- optimization design

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图 1 离心机结构简图

Figure 1. Structural sketch of centrifuge

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图 2 转臂结构初始1/8模型

Figure 2. 1/8 model of initial structure of rotary arm

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图 3 变截面设计分析

Figure 3. Design and analysis of variable section

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图 4 转臂变截面轮廓曲线

Figure 4. Curve of variable section profile of rotary arm

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图 5 不同根部设计下的应力比较

Figure 5. Comparison of stress under design of different roots

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图 6 兜装梁

Figure 6. Pocket beam

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图 7 兜装梁轻量设计对整体应力的影响举例

Figure 7. Examples of influence of lightweight design of pocket beams on overall stress

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图 8 转臂最终设计结果

Figure 8. Final design results of rotary arm

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图 9 约束及边界条件示意图

Figure 9. Schematic of constraints and boundary conditions

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图 10 网格

Figure 10. Grid

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图 11 网格1等效应力云图

Figure 11. Equivalent stress nephogram of Grid 1

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图 12 网格2等效应力云图

Figure 12. Equivalent stress nephogram of Grid 2

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表 1 35CrNi3MoV力学性能参数

Table 1 Parameters of mechanical performance of 35CrNi3MoV

材料名称密度/
(kg·m^-3) 弹性模量/GPa 泊松比屈服强度/MPa

35CrNi3MoV 7850 210 0.3 900

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参考文献(9)

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