某动力涡轮转子连接圆弧端齿的优化设计

徐鲁兵; 廖明夫; 吕延军

doi:10.13433/j.cnki.1003-8728.20220009

某动力涡轮转子连接圆弧端齿的优化设计

doi: 10.13433/j.cnki.1003-8728.20220009

徐鲁兵^{1, 2,},
廖明夫^1, ,,
吕延军³

1.
西北工业大学动力与能源学院，西安　710072
2.
中国航发湖南动力机械研究所，湖南株洲　412002
3.
西安理工大学机械与精密仪器工程学院，西安　710048

详细信息

作者简介:
徐鲁兵（1981−），高级工程师，博士研究生，研究方向为航空发动机结构强度与振动、动力学设计，lubinxu@163.com

通讯作者:
廖明夫，教授，博士生导师，mfliao@nwpu.edu.cn

中图分类号: V232.7; TH132.4
计量
- 文章访问数: 212
- HTML全文浏览量: 130
- PDF下载量: 31
- 被引次数: 0
出版历程
- 收稿日期: 2021-03-09
- 刊出日期: 2023-06-25

Design Optimization on Curvic Couplings of A Power Turbine Rotor

XU Lubing^{1, 2
,},
LIAO Mingfu^{1
, ,},
LYU Yanjun³

1.
School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China
2.
AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, Hu'nan, China
3.
School of Mechanical and Instrumental Engineering, Xi'an University of Technology, Xi'an 710048, China

摘要

摘要: 针对圆弧端齿开设螺栓孔会破坏圆弧端齿齿形结构的完整性、产生局部应力集中等问题，建立了带有螺栓预紧的动力涡轮盘轴圆弧端齿连接转子优化模型，基于ANSYS优化平台进行了带螺栓孔的圆弧端齿结构优化设计。分析结果表明，螺栓孔的开设对圆弧端齿齿底的强度削弱作用要比对凹（凸）齿本身的大，且将螺栓孔径向分布在圆弧端齿的节圆直径附近有利于降低圆弧端齿结构的应力和改善应力分布；在满足其他应力约束条件下，优化后的圆弧端齿最大等效应力比原始方案降低9.1%，端齿工作面最大接触应力降低44.6%，改善了圆弧端齿齿根附近的应力分布状态，同时也没有对动力涡轮盘轴转子变形产生影响。
- 动力涡轮转子 /
- 圆弧端齿 /
- 应力 /
- 优化设计
Abstract: In a bolted rotor with curvic couplings, the structure integrity of curvic coupling tooth may be damaged and local stress concentration may occur due to bolt holes. An optimization model for the power turbine bolted rotor with curvic couplings was established by considering the bolt axial preloading. Then the structure optimization design of power turbine rotor curvic coupling was completed based on ANSYS optimization platform. The results showed that the strength weakening effect of the bolt holes on the tooth root of curvic couplings is greater than that of concave (convex) tooth itself, and the bolt holes radial distribution near the pitch diameter of curvic couplings was beneficial to reduce the stress and improve the stress distribution of curvic couplings. Comparing with the original design, the maximum equivalent stress of the optimum curvic couplings was reduced by 9.1% and the max contact stress on the working face was reduced by 44.6%, which improves the tooth root stress distribution more homogenous and has no effect on the global deformation of the whole power turbine rotor.
- power turbine rotor /
- curvic coupling /
- stress /
- optimization design

HTML全文

图 1 动力涡轮转子及轴端圆弧端齿的三维模型

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图 2 动力涡轮转子及轴端圆弧端齿的有限元模型

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图 3 设计变量齿宽B值的优化迭代过程

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图 4 设计变量外径D₀的优化迭代过程

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图 5 优化目标的收敛情况

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图 6 归一化状态变量的优化迭代过程

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图 7 动力涡轮转子的变形分布图

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图 8 动力涡轮转子的全局等效应力分布图

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图 9 优化前、后的凹齿圆弧端齿等效应力分布图

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图 10 优化前、后的凸齿圆弧端齿等效应力分布图

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图 11 优化前、后的凹齿圆弧端齿径向应力分布图

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图 12 优化前、后的凸齿圆弧端齿径向应力分布图

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图 13 优化前、后的凹齿圆弧端齿周向应力分布图

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图 14 优化前、后的凸齿圆弧端齿周向应力分布图

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图 15 端齿（凹齿）接触面接触状态分布图

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图 16 优化前、后的端齿（凹齿）接触面接触压力分布图

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图 17 优化前、后的端齿（凹齿）接触表面滑移分布图

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表 1 动力涡轮转子设计参数

内容	参数
动力涡轮轴段	材料：锻件GH4169 温度：250 ℃
动力涡轮盘	材料：锻件GH4169;法兰边温度：350 ℃;盘缘温度：475 ℃
转子轴向力/N	7300
螺栓预紧力/N	253750
设计转速/（r·min^–1）	20900
扭矩/Nm	870
圆弧端齿参数	齿数20，螺栓孔10处均布

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表 2 优化前、后的圆弧端齿齿形参数

参数	原始尺寸	优化后尺寸
齿数$ Z $	20	20
压力角$ \theta /(^{\circ}) $	30	30
外径${D}_{{\rm{0}}}$/mm	98	97.18
齿宽B/mm	17	16.47
内径$ {D}_{i} $/mm	64	64.24
螺栓孔中径$ {D}_{c} $/mm	79	80.71
节圆直径$ {D}_{m} $/mm	81	80.71
齿顶高$ {h}_{a} $/mm	1.35	1.33
齿根高$ {h}_{b} $/mm	1.85	1.67
齿顶倒角高$ {h}_{c} $/mm	0.3	0.31
齿根倒角半径$ {R}_{b} $/mm	1	0.99

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表 3 优化前、后的圆弧端齿有限元应力结果

应力	优化前/MPa	优化后/MPa
最大等效应力	956（凹齿）	869（凹齿）
最大等效应力	708（凸齿）	819（凸齿）
最大径向应力	225（凹齿）	190（凹齿）
最大径向应力	308（凸齿）	294（凸齿）
最大周向应力	990.8（凹齿）	870.7（凹齿）
最大周向应力	706（凸齿）	672（凸齿）
最大轴向应力	270.7	230.5
接触面最大接触应力	829.4	459.3
接触面平均挤压应力	203.4	225.6
接触面平均剪切应力	101.4	111.3

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