ARKHANGELSKY'S METHOD OF DETERMINING INTERNAL FRICTION OF POWDER MATERIALS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC G01N19/02 

FIELD: measuring equipment.

SUBSTANCE: method of determining the internal friction of a powder material involves placing a dose of the test powder in a movable carriage, where by the action of shear deformation, the free surface of the test dose of the powder material forms a curved slope profile, over which the coefficient of the powder material internal friction is judged. The profile of the powder material dose free surface is fixed with a photoelectric device. The new is that when moving the test dose powder material along the adjacent supports, braking drive end-to-end wall of the carriage is excluded, and the amount of internal friction determines the ratio of: f=x/y measured by the photocell, where: y - the coordinate of the maximum height of the formed slope profile of the test powder free surface dose; x - the deletion of "y" from the drive carriage wall. Device for implementing the offered method contains a carriage connected with the drive to accommodate the test dose of the powder material, having the shape of a parallelogram with optically transparent sidewalls illuminated by the photoelectric device communicating with the meter. The new is that the drive wall of the through carriage, connected to the pusher, without the bottom adjacent to the support of its longitudinal displacement, is made corrugated by means of transverse triangular corrugations aligned with each other. The generators of the corrugations are inclined to the plane of the drive wall at an angle greater than the angle of the natural slope of the test powder material, in the range of 45-60°.

EFFECT: developing a more accurate method of measuring the coefficient of the powder material internal friction and the device for its implementation, simple and reliable.

2 cl, 4 dwg, 1 tbl, 1 app