METHOD FOR DETERMINING FRICTION COEFFICIENT IN SLIDING ELECTRIC CONTACT WITHOUT ANY LUBRICATION, AND DEVICE FOR ITS IMPLEMENTATION

摘要

FIELD: engines and pumps.;SUBSTANCE: device for determining a friction coefficient in a sliding electric contact without any lubrication consists of a suspension housing containing a movable element with a specimen of test material, which is fixed in the above movable element by means of a hold-down plate. The device includes an L-shaped plate installed on the friction machine body and forming a one-arm lever together with the suspension housing, the movable element and the specimen. The suspension housing has a limit stop connected to an elastic plate equipped with strain gauges. Friction force of the specimen of the test material is determined as per the scheme of the balanced one-arm lever. Balance of the one-arm lever with the specimen of the test material is provided by the limit stop into the elastic plate, thus measuring moment of force of action on the elastic plate. The friction coefficient is calculated based on equality of moment of friction force and moment of force of action on the elastic plate.;EFFECT: possible determination of a friction coefficient at normal indexes.;2 cl, 5 dwg