高速铁路轨道板先张预应力同步放张器的研究  

A Study of Synchronous Unloading Mechanism Using in the Production of the Slab Track

作　　者：宋海磊 吴元文[1,2] 王进戈[1] 王红亮 毛劲[1] 冯卫东[1] 

机构地区：[1]西华大学机械工程与自动化学院,四川成都610039 [2]宜宾普什集团有限公司,四川宜宾644007 [3]中铁二十三局集团有限公司,四川成都610072

出　　处：《西华大学学报（自然科学版）》2014年第2期73-76,共4页Journal of Xihua University:Natural Science Edition

基　　金：铁道部重大科研项目"高速铁路先张轨道板关键技术研究"(2012G005-A)

摘　　要：为实现新CRTSIII型轨道板先张工艺生产过程中张拉钢筋的同步放张,设计一种高速铁路轨道板先张预应力同步放张器,以使轨道板承台剪切力为零,同时提高轨道板强度,减少板的裂纹。对该放张器进行分析、计算和验证,得到具体参数:活塞杆直径15 mm、缸筒壁厚8 mm、缸筒底部厚度13 mm、油腔内的额定最大压力102 MPa,放张开启压力0.87 MPa。对活塞杆进行有限元分析,得到其伸长量仅为0.12 mm。该设计为我国高速铁路新CRTSIII轨道板采用先张工艺的技术改造提供理论参考。In order to achieve automatic synchronous unloading in the production of the slab track of CRTSIII , the unloading mech-anism is studied and designed .With this mechanism , the shear stress will achieve zero and the strength of the slab track will increase and the fissure will be reduced .This paper introduces the analysis , calculation and verification , obtains specific parameters , such as 15 mm for piston rod ,8 mm for cylinder case, 102 MPa for maximum pressure and 0.87 MPa for air pressure.At last, an analysis is con-ducted for the rod ,the elongation indictor is only 0.12 mm,which is within expected results .The design provides theoretical reference for the transformation of new high-speed railway track plate CRTSIII using pre-tensioned approach .

关 键 词：放张器 自动同步放张 新CRTSIII型轨道板 先张法预应力 预应力卸荷 

分 类 号：TH136[机械工程—机械制造及自动化]