Study on Modes and Properties of Oil Supply for Space Liquid Lubrication System

摘要

The liquid lubrication was indicated to be an effective method of lubrication for high-speed and long-life moving parts on basis of analyzing the advantages and disadvantages of several prevalent lubrication methods in space lubrication systems. A new type of liquid lubrication system with oil chamber was designed in allusion to some notable problems in current space liquid lubrication systems, such as lack of oil storage and short lifetime. The kinematics analysis was carried out on basis of introduction to its basic structure and working principle. The oil extravasation in the chamber as well as the pressure and velocity of oil in the liquid lubrication system was carried out by the fluid-solid coupling simulation method. And then the effect of various rotate speeds and different lubricant parameters on the lubrication properties was studied. The calculation results indicate that oil can successfully outflow along the small pore from the chamber and provide to the friction surface in the designed liquid lubrication system, and both of the pressure and velocity increase along with the increasing speed of the moving part. Which confirm that the liquid lubrication system with oil chamber is suitable for lubricating high-speed moving parts of spatial mechanical systems.