PAGE CONTENTS
Objectives
Objective 1:
to representatively test Harmonic Drive ® gears already used or foreseen in future telecom space applications (Solar Array Drive Mechanisms, pointing and deployment mechanisms, etc…) with new, European, space suitable lubricants.
Objective 2:
to produce data sheets for Harmonic Drive ® gear for space applications, in which performance parameters are given in conjunction with space-rated lubricants and for duty cycles typical for space applications
Plan
The activity started with end used technical survey and specification of requirements for space-rated Harmonic Drive ® gear.
Review of suitable space lubricants was performed and two typically used lubricants (PFPE and MAC) were selected.
Based on the end user survey results two Harmonic Drive ® gears type HFUC size 20 and gear ratio 160 were selected and manufactured.
Efficiency and life tests were performed on the gears at European Space Tribology Laboratory (UK). The tests were performed in ambient and thermal vacuum conditions at extensive range of speeds and temperatures.
Based on the test results efficiency model was devised and datasheet for the two different lubrication schemes were established.
The tests have demonstrated that:
– efficiency of the harmonic drive gears has been improved thanks to the selected lubrication scheme
– life of the gear has increased significantly as compared to status prior this activity.
Current Status
Activity has been completed in June 2016.
