几何参数对涡轮榫连接微动疲劳寿命的影响：试验

蒋康河; 鄢林; 陈竞炜; 徐鲁兵; 毛建兴; 胡殿印; 王荣桥

doi:10.13224/j.cnki.jasp.20230090

几何参数对涡轮榫连接微动疲劳寿命的影响：试验

doi: 10.13224/j.cnki.jasp.20230090

蒋康河^1,,
鄢林²,
陈竞炜¹,
徐鲁兵¹,
毛建兴^{3, 4, 5,*, ,},
胡殿印^{3, 4, 5},
王荣桥^{2, 4, 5}

1.
中国航发湖南动力机械研究所，湖南株洲 412002
2.
北京航空航天大学能源与动力工程学院，北京 100191
3.
北京航空航天大学航空发动机研究院，北京 100191
4.
中小型航空发动机联合研究中心，北京 100191
5.
北京航空航天大学航空发动机结构强度北京市重点实验室，北京 100191

基金项目: 国家自然科学基金（51875020，51905020，52022007）；国家科技重大专项（J2019-Ⅳ-0009-0077）

详细信息

作者简介:
蒋康河（1989-），男，高级工程师，博士，主要从事中小型涡轴发动机涡轮结构设计研究

通讯作者:
毛建兴（1989-），男，副研究员、博士生导师，博士，主要从事结构强度可靠性研究。E-mail：maojx@buaa.edu.cn

中图分类号: V231.95
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出版历程
- 收稿日期: 2023-02-20
- 网络出版日期: 2023-04-29

Effect of geometric parameters on fretting fatigue life of turbine attachment: test

JIANG Kanghe^1
,,
YAN Lin²,
CHEN Jingwei¹,
XU Lubing¹,
MAO Jianxing^{3, 4, 5,*
, ,},
HU Dianyin^{3, 4, 5},
WANG Rongqiao^{2, 4, 5}

1.
Hunan Aviation Powerplant Research Institute， Aero Engine Corporation of China，Zhuzhou Hunan 412002，China
2.
School of Energy and Power Engineering，Beihang University，Beijing 100191，China
3.
Research Institute of Aero-Engine，Beihang University，Beijing 100191，China
4.
United Research Center of Mid-Small Aero-Engine，Beijing 100191，China
5.
Beijing Key Laboratory of Aero-Engine Structure and Strength， Beihang University，Beijing 100191，China

摘要

摘要:
针对涡轮榫连接结构微动疲劳行为及损伤表征开展了试验研究。设计了具有不同压力角、齿形角和齿距的7种榫连接结构，在高低周载荷下开展了疲劳试验，所有构型的榫头第2齿发生微动疲劳失效，并根据试验结果总结了榫连接结构几何参数对微动疲劳的影响规律：随着压力角、齿距的增大，微动疲劳寿命逐步降低；而随着齿形角增大，微动疲劳寿命先基本不变，后大幅增加。试验结果为揭示高低周复合疲劳载荷下的榫连接结构失效机理提供了重要依据，为榫连接结构微动疲劳损伤控制参量选取和模型验证提供了数据支撑。
- 榫连接结构 /
- 微动疲劳 /
- 高低周载荷 /
- 裂纹萌生 /
- 几何参数
Abstract:
Test and simulation studies were conducted to investigate the fretting fatigue behaviour and damage characterization of turbine attachment. Seven types of turbine attachment with different pressure angles, tooth angles, and tooth spacing were designed, and fatigue tests were carried out under high and low cycle loads. The second tooth of the tenon of all types suffered fretting fatigue failure. And the effect of the geometric parameters of the tenon on fretting fatigue was obtained: with the increase of pressure angle and tooth pitch, the fretting fatigue life gradually decreased; while with the increase of tooth shape angle, the fretting fatigue life was first kept basically the same, and then increased significantly. Critical evidence was provided to reveal the failure mechanism under combined high and low cycle loads, meanwhile important data were generated for determining the controlling parameter and validating the established model of the fretting fatigue for turbine tenons.
- attachment /
- fretting fatigue /
- high and low cycle load /
- crack initiation /
- geometric parameter

HTML

图 1 枞树型榫连接结构几何参数示意图

Figure 1. Geometric parameters of fir-type attachment

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图 2 夹具宽度对相对滑移距离的影响规律

Figure 2. Effect of fixture width on relative slip distance

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图 3 榫连接结构试验件几何模型及尺寸（单位：mm）

Figure 3. Geometric model and dimensions of the specimen for attachment （unit: mm）

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图 4 榫连接结构试验装置

Figure 4. Test device for turbine attachment

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图 5 高低周载荷谱

Figure 5. Load spectrum of high and low load

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图 6 不同榫连接结构疲劳试验结果

Figure 6. Fatigue test results for different attachments

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图 7 榫连接结构微动疲劳失效示意图

Figure 7. Schematic diagram of fretting fatigue failure of attachment

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图 8 榫连接结构几何参数对微动疲劳寿命的影响

Figure 8. Effect of geometrical parameters of attachment on the fretting fatigue life

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表 1 涡轮榫槽及榫头材料力学性能

Table 1. Material properties of the turbine mortise and tenon

材料	温度/℃	弹性模量/GPa	切变模量/GPa	泊松比
GH4720Li	23	225.0		0.345
GH4720Li	600	190.0		0.370
GH4720Li	650	185.0		0.375
DD412	20	129.9	127.6	0.365
DD412	600	114.5	125.0	0.417
DD412	700	108.0	114.6	0.422

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表 2 不同榫连接结构改变的尺寸参数

Table 2. Dimensional parameters changed with different attachments

编号	压力角β/（°）	齿形角γ/（°）	齿距t/mm
A0	27.5	59	4.797
A1-1	22.5	59	4.797
A1-2	32.5	59	4.797
A2-1	22.5	55	4.797
A2-2	22.5	65	4.797
A3-1	22.5	65	5.297
A3-2	22.5	65	4.297

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表 3 不同榫连接结构疲劳试验结果

Table 3. Fatigue test results for different attachments

编号	平均寿命/cycle	标准差/cycle	变异系数	断裂位置
A0	2 075	551	0.036 9	榫头下齿面
A1-1	6 889	1717	0.028 7	榫头下齿面
A1-2	1 791	330	0.024 9	榫头下齿面
A2-1	7 115	2454	0.041 4	榫头下齿面
A2-2	14 999	2731	0.018 8	榫头下齿面
A3-1	6 745	657	0.011 1	榫头下齿面
A3-2	18 283	4752	0.024 9	榫头下齿面

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