| 摘要 |
FIELD: physics. ^ SUBSTANCE: stand has a frame on which a section of a belt is tied with possibility of placing samples of the conveyed load on the belt, support apparatus for the belt, a device for measuring tension in the belt and apparatus for stretching the belt. Lateral edges of the horizontal section of the belt are tied to longitudinal beams whose edges are detachably connected to cross-bars with possibility of changing the distance between the longitudinal beams. Each cross-beam is fitted at its ends with moving rollers which can rest and move on horizontal guides mounted on the frame, where the rollers are fitted with braking apparatus with possibility of controlling the value of the braking torque. Each cross-beam is attached to ends of a flexible element, both horizontal arms of which bend angle pulleys mounted on the frame with possibility of rotation and lying in the horizontal plane to formation of a vertical loop section formed by two semi-units mounted on a movable iron ring. A shelf is suspended on each movable iron ring with possibility of placing removable loads of equal weight on both shelves. One of the shelves is kinematically linked to an additional flexible element with a built-in dynamometre with apparatus for stretching the additional flexible element and measuring the tension value. Ends of a steel wire cable are tied to a side-block fitted in vertical guides with possibility of moving on the guides and fixation through detachable connections to form a loop section and with possibility of capturing a tray with a gap, where the said tray is formed by a section of the belt with a sample of the conveyed load placed on the tray. The stand also includes a goniometre which can measure inclination of the loop of the steel wire cable and a ruler for determining the displacement of the section of the belt. The ends of the steel wire cable on the side-block are tied with possibility of changing the distance between the ends in the horizontal plane. ^ EFFECT: possibility of analysing parametres of catchers for suspended belt conveyors with different methods of supporting sides of the belt. ^ 3 dwg |
