英语翻译

题目

英语翻译
内爬式起重机回转机构和平衡机构的设计
摘 要：随着我国改革开放形势进一步发展,各种类型的高层建筑不断增多,使用内爬式塔式起重机带来的经济效益和社会效益非常显著.内爬式塔式起重机安装在建筑物内部（如电梯井,楼梯间等）,依靠爬升机构,使塔身随建筑物建高而不断升高.随着建筑业的高速发展,内爬式塔式起重机在高层与超高层建筑的施工中必将得到广泛应用.爬升装置的内塔与外塔同时安装,内塔每次爬升后不用拆出电梯井,爬升前也不用重新安装,回转机构依靠回转支承装置与小齿轮的啮合回转,平衡块在平衡臂上的移动来保持平衡臂和起重臂的力矩相等来保持塔机的平衡.
关键词：起重机；内爬式起重机；平衡机构和回转机构装置设计

答案

内爬式起重机回转机构和平衡机构的设计
Design of the Slewing Mechanism and Balance Mechanism of Inside-self-elevating Type Tower Crane
Abstract:With the further development of China’s reform and opening situation various types of high rise building are increasing continuously,so the use of inside-self-elevating type tower crane leads to significant economic and social benefits.The inside-self-
elevating type tower crane is installed inside of the building (e.g.elevator shaft,stairwell),and its crane body is elevated with the elevation of the building by the elevating mechanism.With the high-speed development of construction industry inside-self-elevating type tower crane will certainly be widely used in the construction of high rise and super high rise buildings.The inside tower and outside tower are installed simultaneously,and it is unnecessary to remove the inside tower out of the elevator shaft and reinstall it before elevation.The slewing of the slewing mechanism is implemented by the rotation supporting device and the engagement with small gears,and the balance of the crane is realized by the moving of balance block in the balance arm and resulting in the equation of the moments of balance arm and elevating arm.
关键词：内爬式起重机；回转机构；平衡机构；设计
Key words:inside-self-elevating type tower crane; slewing mechanism; balance mechanism; design