AS ISO 6484:2021 Earth-moving machinery一Elevating scrapers一Volumetric ratings.
AS ISO 6484 specifies a procedure for approximating the volume of a typical material carried in the bowl of an elevating scraper. The volumes are based on the in-side dimensions of the bowl and a representative volume on top of the bowl. This rating method is intended to provide a consis-tent means of comparing capacities; it is not intended to define actual capacities that might be observed in any specific applica-tion.
ISO 7133, Earth-moving machinery — Tractor-scrapers — Ter-minology and commercial specifications.
Scraper, as defined in ISO 7133 with a powered mechanism fixed to the scraper bowl to assist in loading material.
elevating scraper components
Components as iden-tified in figures 1, 2 and 3.
4 Volumetric ratings
4.1 Positioning of the bowl
4.1.1 The bowl shall be positioned so that the lowest flat surface of the floor is horizontal or as close to horizontal as possible.
4.1.2 The material discharging mechanism shall be positioned to give maximum volumetric capacity.
4.1.3 The elevating mechanism shall be positioned to give the minimum distance between the cutting edge and the path of the outer tips of the elevator. This position shall be within the manufacturer’s specifications.
4.2 Boundaries of the struck volume
The boundaries of the struck volume shall be defined by:
a) the interior surfaces of the bowl sides;
b) the interior surface of the rear of the bowl, or ejector mechanism; the bowl floor;
d) the plane, perpendicular to the forward surface of the cutting edge, that passes through the centreline of the elevator idler (see figure 3)
e) the plane of, or linear extension of, the inner paths of the elevator flights adjacent to the load (see figure 3)
f) the plane defined by the mean lines, i.e. those horizon-tal lines above which, in a side view of the bowl, there is an area of the bowl side equal to the non-bowl side area under the lines (see figure 3);
g) the vertical planes from the interior surfaces of the bowl sides to the plane of the mean lines.
4.3 Boundaries of the top (heaped) volume
The boundaries of the top (heaped) volume shall be defined by:
a) the upper horizontal surface of the struck volume [see 4.2 0];
b) the plane of, or linear extension of, the plane of the inner paths of the elevator flights adjacent to the load [see 4.2 e)];
c) the tangential plane from the top of the solid portion of the rear of the bowl, or ejector mechanism, to the path of the outer tips of the elevator flights, where the point of tangency is at the upper end of the elevator (see figure 4).
AS ISO 6484 pdf download.