WR-CVT弯曲钢丝绳非连续接触钢丝应力及变形分析

ANALYSIS ON STRESS AND DEFORMATION OF STEEL WIRE ROPE AT WR-CVT DISCONTINUOUS CONTACT WIRE

针对WR-CVT钢绳环绕轮弯曲过程中,非连续金属块与钢绳环之间的受力问题,建立了WR-CVT钢绳环与金属块的不连续接触几何模型及Abaqus有限元分析模型,分析了非连续金属块与钢绳环之间的几何接触位置,研究了变速过程中钢绳环内部钢丝的应力和变形特点。结果表明:在钢绳环与非连续金属块边缘接触处钢丝出现应力集中现象,最大von Mises应力为1 273 MPa,大于绳股该截面处其他钢丝的应力;在非边缘接触处,股内钢丝应力分布较为均匀,最大von Mises应力为745.6 MPa;钢绳环在绕轮弯曲过程中,钢丝间存在变形差,最大差值为0.028 mm,而且同根钢丝在不同截面处的变形量也各不相同。因此,钢绳环在带轮弯曲非连续段,钢丝应力波动较大,变形不均匀,此时钢丝之间的滑移加剧,变速过程中较易发生故障。

Aiming at the wear problem of the new-type metal belt type continuously variable transmission steel rope ring,the discontinuous contact geometry model and the finite element analysis model of the steel rope ring and the metal block in the WR-CVT transmission process are established,and the metal block and the steel rope ring are analyzed. The geometrical contact position and its stress and deformation; the results show that： the wire with the rope groove edge stress concentration,the maximum stress of steel wire is 1 273 MPa,the stress value is greater than the other strand wire stress,in the rope groove nonedge contact,The stress distribution of the wire in the strand is even and the maximum stress is 745. 6 MPa. The maximum difference between the steel wire is 0. 028 mm. The deformation of the wire in the strand is extremely poor,and the deformation of the steel wire loop and the steel wire in different sections is not uniform. Therefore,the wear of the steel rope ring at the discrete part of the bending section of the pulley is relatively serious,and it is relatively easy to malfunction when in the working state.