便携式大扭矩液压扳手往复运动机构的创新设计

New design of the back-and-forth movement mechanism in the portable hydraulic wrench with large torque output

分析和研究了便携式大扭矩液压扳手执行机构的结构特点和设计关键,对其中关键性零部件:摇臂、棘轮棘爪的结构和往复运动方案进行了创新设计,并以三门峡电厂50MW水轮机组水轮机转子法兰盘上的大螺钉为背景,采用有限元法,利用大型数值分析软件ANSYS,建立摇臂的三维数学模型,并进行了应力、应变的计算和分析。

The structural features and design focus on the back-and-forth movement mechanism in the portable hydraulic wrench with large output of torque are studied. Both the structure and type of some main parts in the mechanism such as: swinging arm, ratchet, pawl and the back-and-forth movement are designed in a new way. Furthermore, taking the large diameter screws in the flange of SANMENXIA hydroelectric power plant as an example, the space mathematical model of the swinging arm is set up and its stress and strain are calculated and analysed by the method of finite element and the large numerical software ANSYS5.7.