论文信息 - EXPERIMENTAL INVESTIGATION OF CLEARANCE EFFECTS IN A REVOLUTE JOINT

EXPERIMENTAL INVESTIGATION OF CLEARANCE EFFECTS IN A REVOLUTE JOINT

This paper deals with the effects of clearances in revolute joint s. Experimental data is acquired from a testbed made of a four-bar mechanism of crank-rocker type, with motorized crank and clearance between rod and rocker. Since the revolute joint pair s can be changed, different values of clearance can be tested. Also the radius of the crank, the length of the truss and the angular speed of the crank can be changed, in order to investigate different settings. During test sessions, rocker and rod accelerations are acquired wit h accelerometers, and output graphs are compared to the numerical results coming from off-l ine multibody simulations. Surface wear on the axle and bushing of the revolute joint is measured either with a micrometer tool, either with a three-dimensional surface roughness tester. Wear does not affect the entire surface of the shaft, but mostly happens on spec ific spots, as predicted by our numerical model.

Alessandro Tasora | E. Prati | Marco Silvestri

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