扭矩和角速度随时间变化的摩擦离合器热流

Jenan S. Sherza, I. Hussain, O. Abdullah
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引用次数: 5

摘要

当一个物体在另一个物体上滑动时,摩擦力所作的功的主要部分将在物体接触面之间的界面上以热的形式出现。因此,该界面的温度将升高到很高的值,并可能引起足够高的热应力,从而在接触面产生大的热变形和热裂纹。本文给出了计算干摩擦离合器摩擦面总热量的解析解,利用双惯量系统的运动方程确定了解析解,假设接触面上的压力分布均匀,在这种情况下,热流密度随圆盘半径线性增加。转矩和角滑动速度与时间有关。通过第一个接合周期(0≤t≤ts),讨论了转矩和角滑动速度随时间的变化。结果表明,随着离合片半径的增大,产生的热量(热流密度)增大,其中最大值出现在离合片的外半径处。最大热通量出现在滑动期中期(t=0.2s)。在本文中,假设相对角速度值随接合时间线性减小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Heat Flux in Friction Clutch with Time Dependent Torque and Angular Velocity
When a body slides over another body, the major part of the work done against the frictional force which resists the motion will appear as a heat at the interface between the contact surfaces of the bodies. Consequently, the temperatures of that interface will increase to high values and may cause a high thermal stresses enough to produce large thermal deformations and thermal cracks in the contact surfaces. The present paper presents an analytical solution to calculate the total heat generated between the rubbing surfaces for the dry friction clutch, the analytical solution was determined using the equations of motion of two-inertia system assuming a uniform pressure distribution over the surfaces of contact where in this case the heat flux will increase linearly with disc radius. The torque and angular sliding speed are dependent of time. The variation of torque and angular sliding speed with time were discussed through the first period of engagement (0≤t≤ts). The results showed that the values of the heat generated (heat flux) increases with disc radius where the maximum value appeared at the outer radius of the clutch disc. The maximum heat flux occurred at the mid time of slipping period (t=0.2s). In this research paper, it was assumed that the values of the relative angular speed decrease linearly with time of engagement.
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