液黏调速离合器摩擦副热-结构耦合分析
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摘要
根据热传导理论,结合热流密度,考虑摩擦片上沟槽的对流换热作用,建立了液黏调速离合器摩擦副的理论模型。根据离合器实际工况,对摩擦副边界摩擦阶段进行数值分析,研究摩擦副不同材料组合下的温度与变形差异。研究结果表明,摩擦副温度场被沟槽分成了不同温度梯度的椭圆块,高温集中在靠近外径处;相同工况下,对偶片材料为30Cr Mn Si A时温度和变形量最大。摩擦副内外径发生了沿z轴正向和负向位移,整个摩擦副产生碟形翘曲现象。在对偶片外径约束情况下,仅30Cr Mn Si A未发生塑性变形。这对液黏传动机理和摩擦副主动设计具有指导意义。
Based on the heat conduction theory,combining the thermal flux density,considering convective heat transfer in the groove on the friction pairs,a theoretical model of the friction pairs of the hydro viscous speed regulating clutch is established. According to the actual working condition of clutch,numerical analysis for the boundary friction stage of friction pair is performed,and the difference of temperature and deformation under different material combinations of friction pairs is studied. The results show that the temperature field of friction pairs is divided into elliptical blocks of different temperature gradient by the groove,and high temperature is concentrated near the outside diameter. Under the same conditions,the temperature and deformation is biggest when the dual material is 30 Cr Mn Si A. The internal and external diameters of the friction pairs occur positive and negative displacements along the z axis,and disc buckling occurs. It is found that only 30 Cr Mn Si A doesn't undergo plastic deformation in case of the outer diameter having constraint. This is meaningful for the mechanism of hydro viscous transmission and active design of friction pairs.
Based on the heat conduction theory,combining the thermal flux density,considering convective heat transfer in the groove on the friction pairs,a theoretical model of the friction pairs of the hydro viscous speed regulating clutch is established. According to the actual working condition of clutch,numerical analysis for the boundary friction stage of friction pair is performed,and the difference of temperature and deformation under different material combinations of friction pairs is studied. The results show that the temperature field of friction pairs is divided into elliptical blocks of different temperature gradient by the groove,and high temperature is concentrated near the outside diameter. Under the same conditions,the temperature and deformation is biggest when the dual material is 30 Cr Mn Si A. The internal and external diameters of the friction pairs occur positive and negative displacements along the z axis,and disc buckling occurs. It is found that only 30 Cr Mn Si A doesn't undergo plastic deformation in case of the outer diameter having constraint. This is meaningful for the mechanism of hydro viscous transmission and active design of friction pairs.
引文
[1]谢方伟,侯友夫.液体黏性传动装置摩擦副瞬态热应力耦合[J].中南大学学报(自然科学版),2010,41(6):2201-2206.
[2]魏建华,陈宁,李福尚,等.液体粘性调速离合器摩擦片变形失效研究[J].热力发电,2013(12):71-74.
[3]张家元,丁普贤,李长庚,等.湿式离合器摩擦片的热结构耦合分析[J].北京科技大学学报,2013,35(12):1668-1673.
[4]杨亚联,张喀,秦大同.湿式多片离合器热机耦合温度场及应力场分析[J].中国机械工程,2015,25(20):2740-2741.
[5]JEN T C,NEMECEK D J.Thermal analysis of a wet-disk clutch subjected to a constant energy engagement[J].International Journal of Heat&Mass Transfer,2008,51(7/8):1757-1769.
[6]杨勇强,李小莹,曹博涛,等.湿式摩擦离合器摩擦片的热力耦合分析[J].机械传动,2016,40(1):153-156.
[7]何泽银,吕和生,林腾蛟,等.湿式多片摩擦离合器接排过程热结构耦合分析[J].机械研究与应用,2010(5):47-50.
[8]崔健中,王存堂,谢方伟,等.液黏调速离合器摩擦副热-结构耦合分析[J].工程机械,2015,46(7):1-8.
[2]魏建华,陈宁,李福尚,等.液体粘性调速离合器摩擦片变形失效研究[J].热力发电,2013(12):71-74.
[3]张家元,丁普贤,李长庚,等.湿式离合器摩擦片的热结构耦合分析[J].北京科技大学学报,2013,35(12):1668-1673.
[4]杨亚联,张喀,秦大同.湿式多片离合器热机耦合温度场及应力场分析[J].中国机械工程,2015,25(20):2740-2741.
[5]JEN T C,NEMECEK D J.Thermal analysis of a wet-disk clutch subjected to a constant energy engagement[J].International Journal of Heat&Mass Transfer,2008,51(7/8):1757-1769.
[6]杨勇强,李小莹,曹博涛,等.湿式摩擦离合器摩擦片的热力耦合分析[J].机械传动,2016,40(1):153-156.
[7]何泽银,吕和生,林腾蛟,等.湿式多片摩擦离合器接排过程热结构耦合分析[J].机械研究与应用,2010(5):47-50.
[8]崔健中,王存堂,谢方伟,等.液黏调速离合器摩擦副热-结构耦合分析[J].工程机械,2015,46(7):1-8.