整体俯仰-Measurement and Analysi.pdfVIP

Measurement and Analysis upon the Gravity center Position of the Luffing system of stacker and reclaimer in whole luffing style LiYimin Postal .Code: 116013. Dalian, the People’s Republic of China DALIAN HEAVY INDUSTRIES AND CRAN, LTD. Key words: stacker and reclaimer; gravity center of luffing system measurement Stacker and reclaimer could be in whole or partial luffing style when applying hydraulic cylinders to drive the luffing system. The whole luffing style is the slewing platform set with two pivots to support the whole luffing system, in addition one or two cylinders connecting the slewing platform and the hoisting system to adjust the luffing angle. In the course of luffing , the rotating angles around the axis of the two pivots on the slewing platform for any parts of the general luffing system, such as the bucket wheel, boom and counter-weight etc. are equal, meaning that the upper part is a whole part rotating around the two pivots. For common styles of whole luffing system see fig 1. and fig 2. In the course of using and maintenance, the users need to know and master the position as well as the changing law of gravity center of the whole machine or the luffing system so as to keep routine maintenance, due to various kinds of reasons. The position as well as the changing law of gravity center of the general luffing system could be known by means of measuring then calculation. 1. The measurement upon unbalanced torque The unbalanced torque which is the product of the distance between the gravity center of the hoisting system and the axis of the two pivots on the slewing platform and the total weight of the hoisting system, could be got by means of measuring the balanced-to-ground