微车变速器的轴承-齿轮轴系非线性三维接触动态特性研究

针对现有接触研究方法的不足,以某微车变速器第四挡齿轮传动系统为研究对象,提出了轴承-齿轮轴系的三维接触非线性动态有限元分析模型,进行了齿轮传动轴承-齿轮轴系非线性三维接触动态特性研究,实现了齿轮系统啮合冲击的动力学仿真,得到了动态啮合时轮齿的接触状态、接触应力、齿根弯曲应力等随啮合位置变化的规律。研究结果为变速器的动态性能优化提供了理论依据。

便于维护的采煤机摇臂系统的设计

针对采煤机因其摇臂系统在运行过程中故障率高而大幅度降低了其生产能力的问题,通过采用对其传动方式进行改造的方式完成了对平行轮传动摇臂系统的整体设计,并完成了摇臂系统中齿轮轴轴承和齿轮的设计。将改造后的摇臂系统应用于实际生产中发现,采煤机摇臂系统的故障率和维护时间明显降低。

Analysis of axial force of double circular arc helical gear hydraulic pump and design of its balancing device

In view of the axial force produced in the working process of double arc helical gear hydraulic pump,the theory of differential equation of curve and curved surface was utilized so that the calculation formula of axial force was obtained and the relationship between the axial force and structure parameters of gears was clarified.In order to balance the axial force,the pressure oil in the high pressure area was introduced into the end face of the plunger to press the plunger against the gear shaft,and the hydrostatic bearing whose type is plunger at the end of the shaft was designed.In order to verify the balance effect of axial force,the leakage owing to end clearance and volume efficiency of gear hydraulic pump before and after the balancing process was analyzed.This paper provides a new analysis idea and balance scheme for the axial force produced in the working process of the double arc helical gear hydraulic pump,which can reduce the leakage owing to end clearance caused by the axial force and improve the volume efficiency of the gear hydraulic pump.