Analysis on Thermal Characteristic of Parallelism of Wet Clutch Steel Discs
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摘要: 针对湿式离合器开发过程中对偶钢片平行度的实际设计要求，运用ABAQUS有限元分析软件建立湿式离合器摩擦副三维有限元模型，研究对偶钢片平行度对其热特性的影响，为对偶钢片平行度的设计要求提供了理论依据。研究结果表明，对偶钢片平行度会改变摩擦副接合面接触压力分布状态，增加对偶钢片径向温度梯度和应力梯度，使其接合表面出现局部高温区；对偶钢片最高温度和最大应力随平行度的增大而增大，当平行度为0.1 mm时，对偶钢片最大等效应力超过其材料的屈服极限，材料会发生塑性变形。Abstract: Based on the practical design requirements regarding to the parallelism of steel disc during the development of wet clutch, a three-dimensional model of friction pairs on a wet clutch was developed with nonlinear finite element method (FEM) software ABAQUS to study the effect of parallelism of steel discs on its thermal characteristic, providing a theoretical basis for the design requirements of parallelism. The FEM simulation result shows that parallelism of steel disc can change the distribution of contact pressure on friction pairs, improving the radial temperature gradient and stress gradient and making the local high temperature appearing. Improving the parallelism will increase the maximum temperature and stress of steel disc. When the parallelism is 0.1 mm, the maximum equivalent stress of steel disc exceeds its yield strength resulting in plastic deformation.
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Key words:
- wet clutch /
- parallelism /
- thermal characteristic /
- contact pressure /
- FEM simulation
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表 1 摩擦副物理参数
名称 密度ρ/(kg·m-3) 比热容c/(J·kg-1·K-1) 热膨胀率α/10-5 导热系数λ/(W·m-1·K-1) 弹性模量E/GPa 泊松比μ 对偶钢片 7 800 487 1.27 45.9 210 0.29 摩擦衬片 1 125 1 610 0.65 0.241 0.27 0.14 
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