Spline transmission is simple

reliable and its specific power is high

so that its status in the aircraft is irreplaceable. Spline has some characteristics such as high rotating speed

large transmission torque

light weight and harsh working environment

some splines even can’t achieve lubrication and cooling. In addition

the support system of external spline and the one of internal spline are isolated with each other. All these factors lead to the misalignment of spline connection and the problems of lubrication and wear. From the 1950s

the research on the design of spline

lubrication and wear

experiment

troubleshooting and maintenance has been carried out continuously by aeronautically developed countries

forming systematical methods of design

experiment

operation and maintenance. However

China do few research on spline

especially on aviation spline

unable to meet the demand of the aviation sector on the drive components. The spline is often regarded as subsidiary components and common connecting parts in China

attracting less attention. This paper summarizes the research progress of decades of domestic and international aviation spline. Studies of aviation spline on failure

lubrication

vibration

wear

misalignment

rotor dynamics and experiment are analyzed and summarized

development trend of aviation spline research is also discussed. This paper hopes to provide a reference for solving the problems of misalignment

lubrication and wear problems faced in domestic aviation spline.