DEVICE FOR EVALUATION OF FRICTION RATIO Russian patent published in 2009 - IPC G01N19/02 

FIELD: machine building.

SUBSTANCE: invention refers to agricultural machine building, particularly to methods of analysis of material friction ratios. The device for evaluation of friction ratio consists of a sample located on investigated surface, of a fibre connected to a load, and also of a sensor of switching on and sensor of switching off of electric stopwatch arranged correspondingly at the beginning and at the end of a metre section. The sample is made in form of a cylinder with the central groove at its generatrix surface wherein the fibre is tied; also the sample is put on axis rigidly connected with a horizontal carrier, the second end of which is pivotally connected with a frame; notably, in investigated surface there is a hole through which the fibre with load passes.

EFFECT: upgraded accuracy of evaluation of friction ratio and simultaneous reduction of test bench dimension.

2 dwg