Design Of Remanufacturing Technology And Equipment For Tooth Parts Of MW Wind Turbine

Wind power industry has always been one of the strategic emerging industries in China,and is also one of the key characteristic industries in our region.The failure ratio of the gearbox of wind turbine accounts for 40%of the total outage fault of wind turbine.It is one of the main outage faults of wind turbine.The failure of gearbox leads to 30%of the outage of gearbox.Laser cladding and remanufacturing technology can effectively improve the service life of the gearbox of wind turbine and reduce the operation and maintenance of the after-maintenance of wind turbine.Cost.In recent years,laser cladding technology in China has been developing rapidly,and the research of cladding remanufacturing on the surface of failed parts has become more and more mature.Gear is an important part in the field of mechanical engineering.Because of the characteristics of gear,it has always been a major problem in the field of remanufacturing.The traditional repair methods mainly aim at gears with simple meshing motion,low load,low surface precision and no carburizing on the surface.However,for gears with high hardness,carburizing treatment on the surface,complex working environment and heavy load,etc.The traditional repair methods of gears can not achieve good repair effect,but mainly adopt the way of replacing gear pairs for maintenance.In this paper,2.5MW wind turbine gearbox gear as the main repair object,the feasibility of laser cladding remanufacturing and laser cladding process are studied.For the purpose of laser cladding repair,according to the failure form of wind power gearbox gears and the performance requirements of gear surface,combined with the selection basis of cladding material,the cladding material was determined as Ni60 alloy powder.The single-pass cladding experiment of side-shaft synchronous powder feeding was carried out with steel 17CrNiMo6 used for gear of 2.5MW wind power gearbox.The quality of cladding layer under different laser cladding process parameters was analyzed,and the process parameters suitable for 17CrNiMo6 steel were preliminarily found out The properties of Ni60 cladding layer on the surface of 17CrNiMo6 steel were tested by XRD,metallographic analysis,microhardness test and friction and wear test,which provided experimental basis for preparing high quality cladding layer on the surface of gearbox of wind turbine generator.Aiming at the lack of equipment for gear remanufacturing at present,the design of integrated machine tool based on integrated laser of gear grinder is carried out and the design requirements are analyzed.According to the design requirements,the forming grinder is used as the master machine.The basic structure and processing principle of the forming grinder are introduced.On this basis,the spindle box components are reformed and integrated laser.On the integrated equipment,whether the laser can realize the processing of gear involute trajectory is analyzed,which provides the basis for the project progress.