涡轮轴内壁积碳清理设备结构设计与分析

Structural Design and Analysis of the Equipment for Cleaning Carbon Deposits on the Inner Wall of the Turbine Shaft

面向涡轮轴内壁积碳的清理需求,针对现有人工清理工艺存在的去除效率低和一致性差等加工难题,提出了采用磨料刷恒压力抛光清理大深径比涡轮轴内壁积碳的方法,设计了涡轮轴内壁积碳清理设备。用于支撑磨料刷的抛光杆是典型大长径比弱刚性构件,在重力和抛光压力作下产生挠曲变形,导致抛光杆在不同伸长量情况下抛光压力变化,进而造成积碳去除率发生变化。为了保证恒定的积碳去除率,分析了抛光杆挠曲变形量与抛光杆X向进给量及磨料刷X向实际进给量之间的关系,建立了恒压力抛光模型,得出了抛光杆X向进给量的补偿量w_(x)。结果表明:抛光压力F=60 N时,抛光杆在悬伸量l=300 mm处的X向进给量的补偿量w_(x1)=0.0119 mm;l=1615 mm处的X向进给量的补偿量为w_(x2)=0.5407 mm。

Faced with the cleaning requirements of carbon deposits on the inner wall of the turbine shaft,a method for cleaning carbon deposits on the inner wall of the turbine shaft with a large depth-to-diameter ratio by using abrasive brushes with constant pressure polishing was proposed in response to processing difficulties such as low removal efficiency and poor consistency in the existing manual cleaning process.The polishing rod used to support the abrasive brush is a typical weak rigid member with a large aspect ratio,which generates flexural deformation under gravity and polishing pressure,resulting in changes in the polishing pressure under different elongation conditions of the polishing rod,which in turn causes carbon depositions removal rate Changes.In order to ensure the constant carbon depositions removal rate,the relationship between the flexural deformation of polished rod and the X-direction feed of polished rod and the actual feed of abrasive brush X-derection feed was analyzed,the constant pressure polishing model was established,and the compensation w_(x)of the X-direction feed of polished rod was obtained.The results show that:when the polishing pressure is F=60 N,the compensation amount of X-direction feed at the suspension value l=300 mm is w_(x1)=0.0119 mm.The compensation for the X-direction feed at l=1615 mm is w_(x2)=0.5407 mm.