海上半潜式平台锚机长传动轴的检修

Overhaul of Long Transmission Shaft of Anchor Winch on Marine Semi-submersible Rig

海上某半潜式钻井平台锚机经过多年的使用,锚机长传动轴有多个锈蚀麻点。由于锚机是进口设备,没有相关的技术参数,文章阐述了锚机长传动轴和轴承技术参数的测量和分析过程,并依据技术标准,确定了长传动轴的尺寸和公差配合等技术参数。分析认为,长传动轴与滚动轴承采用过盈配合,长传动轴的公差带为r6。长传动轴与滑动轴承采用间隙配合。用激光焊补轴的锈蚀麻点,在磨床上对焊补的轴段进行磨削,采用镀铁工艺修理轴的锈蚀部位,镀铁后,在磨床上进行轴的磨削加工,加工修理后的轴表面Ra=0.8μm。锚机装配和试运行后,工作正常。该研究成果填补了海上半潜式平台锚机长传动轴检修的技术空白,对海上锚机长传动轴的检修具有借鉴意义。

The long transmission shaft of anchor winch on a marine semi-submersible rig has many corroded pits after years of use.Since the anchor winch is an imported equipment and has no relevant technical parameters,the paper describes the measurement and analysis process of the technical parameters of the long transmission shaft and the bearing of windlass,and determines the technical parameters such as tolerances and dimensions of the long transmission shaft according to the technical standards.It is considered that the interference fit between the long transmission shaft and the rolling bearing is adopted,and the tolerance zone of the long transmission shaft is r6.The long transmission shaft and the sliding bearing adopt a clearance fit.The corroded pits of the shaft were repaired by laser welding,and the repaired shaft was ground on a grinder.The corroded parts of the shaft were repaired by iron plating.After the iron plating,the shaft was ground on a grinder,and the repaired shaft surface Ra=0.8μm after processing was repaired.After assembly and trial operation,the anchor winch works normally.The research result fills the technical gap of the overhaul of long transmission shaft of anchor winch on marine semi-submersible rig,and has the corresponding reference significance for the overhaul of long transmission shaft of anchor winch on marine.