公开(公告)号：EP2620405A1

公开(公告)日：2013-07-31

申请号：EP11859735.0

申请日：2011-08-17

申请人： Changsha Zoomlion Heavy Industry Science & Technology Development Co., Ltd. ,  China Major Bridge Engineering Co., Ltd.

发明人： ZHANG, Yiliang ,  HU, Shenglei ,  LIANG, Sha ,  LI, Bai ,  MAO, Kuai ,  WU, Mao ,  LI, Yuli ,  CHEN, Longjian ,  ZHOU, Hanlin ,  YU, Lekang

IPC分类号： B66C13/20 ,  B66C23/28 ,  B66C23/62

CPC分类号： B66C23/32 ,  B66C23/283

摘要： Disclosed are a lifting structure of tower crane, a hydraulic system for the lifting structure, and a lifting method for tower crane. The hydraulic system of the lifting structure of tower crane comprises a forward branch working oil-way and a reverse branch working oil-way. Arranged on the forward working oil-way of each oil cylinder is a forward speed regulator valve for adjusting the flow rate of hydraulic oil. Arranged on the reverse branch working oil-way of each oil cylinder is a reverse governor valve for adjusting the reverse flow rate of the hydraulic oil. The lifting structure of tower crane comprises the hydraulic system for lifting structure. In the lifting method for the tower crane, the forward governor valve and the reverse governor valve on each oil cylinder are used to control the forward and reverse flow rate of the hydraulic oil in the branch working oil-ways of each oil cylinder and the synchronization accuracy of each cylinder, and synchronized lifting of each of the cylinders is allowed by keeping equal the forward and reverse flow rate of the hydraulic oil in the branch working oil-ways of each oil cylinder and by the synchronized lifting of each of the cylinders.

摘要翻译： 公开了塔式起重机的提升结构，用于提升结构的液压系统和塔式起重机的提升方法。 塔式起重机提升结构的液压系统包括前向分支工作油路和反向分支工作油路。 每个油缸的前进工作油路安装有用于调节液压油流量的前进调速阀。 在每个油缸的反向分支工作油路上排列的是用于调节液压油的反向流量的反向调速阀。 塔式起重机的起重结构包括起重结构的液压系统。 在塔式起重机的提升方法中，每个油缸上的前向调速阀和倒档调节阀用于控制油缸分支工作油路中液压油的正向和反向流量，同步 通过保持每个油缸的分支工作油路中的液压油的正向和反向流量以及每个气缸的同步提升，允许每个气缸的精度和每个气缸的同步提升。