高加速寿命试验下的干式离合器半联动热稳定性

王阳阳; 陈广达; 李南; 袁一卿

doi:10.19818/j.cnki.1671-1637.2016.03.010

高加速寿命试验下的干式离合器半联动热稳定性

doi: 10.19818/j.cnki.1671-1637.2016.03.010

王阳阳^{1, 2,},
陈广达²,
李南³,
袁一卿^{1, 2}

1.
同济大学新能源汽车工程中心，上海 201804
2.
同济大学汽车学院，上海 201804
3.
密歇根大学安娜堡分校机械工程学院，密歇根安娜堡 48109

基金项目:

国家自然科学基金项目 51305302

中央高校基本科研业务费专项资金项目 20140440

汽车仿真与控制国家重点实验室开放基金项目 20121104

详细信息

作者简介:
王阳阳(1980-), 女, 安徽肥东人, 同济大学副教授, 工学博士, 从事汽车系统动力学与控制研究

中图分类号: U463.51
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- 被引次数: 0
出版历程
- 收稿日期: 2015-12-27
- 刊出日期: 2016-06-25

Semi-linkage thermal stability of dry clutch under highly accelerated life test

1.
Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China
2.
School of Automotive, Tongji University, Shanghai 201804, China
3.
Institute of Mechanical Engineering, University of Michigan-Ann Arbor, Ann Arbor 48109, Michigan, America

More Information

Author Bio:
WANG Yang-yang(1980-), female, associate professor, PhD, +86-21-69588660, wyangyang@tongji.edu.cn

摘要

摘要: 针对干式离合器在半联动操作中的热失效问题, 研究了半联动过程中离合器的热稳定性。基于离合器半联动操作过程中的滑摩功, 得到了影响热稳定性的关键变量, 包括摩擦片轴向压力、相对滑磨转速和滑磨持续时间。结合干式离合器热模型和高加速寿命试验, 设计了强化加载剖面, 验证了摩擦片热模型的循环强化加载试验效果。为了分析高加速寿命试验下不同变量对热稳定性的影响程度, 通过正交试验和极差分析法, 研究了关键变量对摩擦片最高热点温度的影响。研究结果表明: 按影响程度由大到小排序, 3个关键变量依次为相对滑磨转速、滑磨持续时间和摩擦片轴向压力; 当发动机转速较低, 约为1 000 r·min^-1时, 热点温度始终保持在200℃以下的安全温度, 当发动机转速超过1 500 r·min^-1, 轴向压力超过2.0 kN, 滑磨持续时间超过8 s后, 热点温度将超过200℃的安全温度; 采取合适的半联动操作组合, 例如控制发动机的转速与频繁半联动操作的累计时间, 可以有效防止摩擦片热失效的发生。
- 车辆工程 /
- 干式离合器 /
- 半联动 /
- 高加速寿命试验 /
- 强化加载剖面 /
- 摩擦片 /
- 热稳定性
Abstract: Aiming at the problem of thermal failure of dry clutch during semi-linkage operation, the thermal stability of clutch in semi-linkage process was studied.Based on the sliding friction power of clutch during semi-linkage operation, the key variables effecting the thermal stability were acquired, including the axial pressure of friction plate, relative sliding speed and sliding friction duration time.With the combination of dry clutch thermal model and highly accelerated life test (HALT) method, the enhancement loading profile was designed, and the effect of cyclic enhancement loading test of friction plate thermal model was verified.In order to reflect the influence degrees of different variables on the thermal stability in highly accelerated life test, the effect of sensitive variables on the highest hot spot temperature of friction plate was studied by using orthogonal test and range analysis method.Analysis result indicates that according to the influence degrees from the great to the little, the order of key variables are relative sliding speed, sliding friction duration time and the axial pressure of friction plate respectively.When the engine is running at a lower speed of 1 000 r·min^-1, the hot spot temperature is always under the safe temperature of 200 ℃.When the engine speed exceeds 1 500 r·min^-1, the axial pressure of friction plate is more than 2.0 kN, and the sliding friction duration time is more than 8 s, the hot spot temperature will exceed the safe temperature of 200 ℃. With the right semi-linkage operation, such as controlling both the engine speed and the accumulation time of frequent semilinkage operation, the thermal failure of friction plate can be effectively prevented.
- vehicle engineering /
- dry clutch /
- semi-linkage /
- highly accelerated life test /
- enhancement loading profile /
- friction plate /
- thermal stability

HTML全文

图 1 离合器摩擦片三维模型

Figure 1. Three dimensional model of clutch friction plate

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图 2 离合器摩擦片有限元简化模型

Figure 2. Simplified finite element model of clutch friction plate

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图 3 单次加载后的摩擦片温度场

Figure 3. Temperature field of friction plate after single loading

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图 4 卸载后的摩擦片温度场

Figure 4. Temperature field of friction plate after unloading

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图 5 基于单次加载的摩擦片温度发展趋势

Figure 5. Development trend of temperature of friction plate based on single loading

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图 6 高加速寿命试验剖面

Figure 6. Profile of highly accelerated life test

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图 7 真实工况下的高加速寿命试验剖面

Figure 7. Profile of highly accelerated life test in real case

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图 8 简化的高加速寿命试验剖面

Figure 8. Simplified profile of highly accelerated life test

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图 9 循环加载后的摩擦片温度场

Figure 9. Temperature field of friction plate after cyclic loading

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图 10 基于高加速寿命试验的摩擦片温度发展趋势

Figure 10. Development trend of temperature of friction plate based on highly accelerated life test

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图 11 累计多次半联动的安全操作

Figure 11. Safety operation of cumulative multiple semi-linkage

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表 1 单次加载方案

Table 1. Single loading scheme

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表 2 发动机转速为1 000 r·min^-1的正交试验结果

Table 2. Result of orthogonal test with engine speed of 1 000 r·min^-1

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表 3 发动机转速为1 500 r·min^-1的正交试验结果

Table 3. Result of orthogonal test with engine speed of 1 500 r·min^-1

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表 4 发动机转速为2 000 r·min^-1的正交试验结果

Table 4. Result of orthogonal test with engine speed of 2 000 r·min^-1

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表 5 因素主次关系

Table 5. Primary-secondary relationship of factors

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