双球铰连接柱塞缸的结构性能

Structural performance of plunger cylinder connected by a double ball hinge

针对自由锻造液压机的双球铰连接柱塞缸,基于球铰自锁条件,分析了柱塞缸的工作状态,研究了连接球铰副挤压工件时的自锁偏心距,明确了柱塞缸连接球铰副的运动条件,为合理利用柱塞缸的连接球铰副提供了依据。根据柱塞缸的结构特点,建立了柱塞的受力模型,分析了柱塞的受力状态,研究了柱塞对导向套和压套的侧推力以及控制柱塞缸侧推力的条件,明确了压套是制约工作缸抗偏载的关键因素。结合柱塞的导向结构特点和受力分析,阐述了在用柱塞缸导向结构的工艺性缺陷,提出了改善柱塞缸抗偏载性能的结构方案,为大型自由锻造液压机的柱塞缸结构设计提供了有效支撑。

For the plunger cylinder connected by a double ball hinge of free forging hydraulic press,the working condition of plunger cylinder was analyzed based on the self-lock condition of ball hinge,and the self-lock eccentricity was studied when the workpiece was extruded by a connecting ball pair hinge.Then,the movement condition of connecting ball hinge pair for plunger cylinder was determined to provide basis for the rational use of connecting ball hinge pair for plunger cylinder.Furthermore,based on the structure characteristics of plunger cylinder,the mechanical model of plunger was built,the force state of plunger was analyzed,the side thrust of plunger to guide sleeve and pressure sleeve was studied,the conditions of controlling side thrust for plunger cylinder were analyzed,and it was clear that the pressure sleeve was the critical factor for restricting the bias load resistance of working cylinder.Finally,combining the characteristics of the guide structure and the force analysis of plunger,the technical defects of the guide structure for plunger cylinder in use were elaborated,and the structural scheme for improving the bias load resistance performance of plunger cylinder was proposed to provide effective support for the structural design of plunger cylinder for large free forging hydraulic press.