Experimental study of friction at tapered surfaces in keyless propeller--2nd report, effects of taper machining error and surface roughness

摘要

In order to find out a clue to the solution of torque slip problem in keyless propeller, this studyinvestigates the effects of taper machining error and surface roughness on friction behavior of taperedcontact. Pushing-up tests were conducted using model propeller boss (AIBC3) and shaft (SF440A). The experiments revealed that the friction behavior especially grip coefficient is significantlyaffected by taper machining error compared to surface roughness. Accordingly it is proposed thatpropeller boss should be pushed up into shaft to the reqired push-up distance excepting the zone oflow grip coefficient.