Komatsu GALEO BR550JG-1, Руководство по эксплуатации и техническому обслуживанию

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OPERATION
OPERATION
USAGE OF JAW CRUSHER
GRAIN DISTRIBUTION, ADJUSTMENT OF CRUSHER OUTLET CLEARANCE AND CRUSHABLE AMOUNT
DEFINITION OF "UNDER 40"
The grain size of 0 to 40 mm (0 to 1.6 in) shown in the catalog indicates a grain size distribution in which the
maximum size of the crushed concrete block is 50 mm (2.0 in) in diameter and and concrete blocks smaller than 40
mm (1.6 in) account for approx. 95% of all.
ADJUSTMENT OF CRUSHER OUTLET CLEARANCE
The clearance value is the maximum width of the outlet. If this is adjusted to 55 mm (2.2 in), the grain size of crushed
debris is less than 40 mm (1.6 in) on condition that debris to be crushed is a concrete block; both fixed jaw plate and
swing jaw plate are brand new; the grizzly bar pitch is 50 mm (2.0 in).
Generally dimension in the grain size distribution can be defined as follows;
Dimension in grain size distribution = Outlet clearance - 10 mm (0.4 in)
GRAIN DISTRIBUTION
The jaw crusher outlet is so shaped as shown in the figure at right.
The clearance can be adjusted in direction "a" (crusher amplitude
stroke), but cannot be adjusted in direction "b" (crusher width) or
vertically.
Accordingly the grain size of crushed debris such as concrete,
which can be crushed to a cubic form like a dice, is 0 to 40 mm (0
to 1.6 in) in diameter with OSS set at 50, which covers nearly 95%
of all. When natural rocks are crushed, meanwhile, they may be
crushed flatly along their grains. As a result the ratio of blocks in the
range of 0 to 40 mm (0 to 1.6 in) is reduced.
NOTICE
When crushed debris are heaped up, blocks of larger grain size are outstanding. This is because the larger a grain size is, the less
specific gravity a block has and blocks of large grain size tend to surface. Usually there are more grains of small diameter than
it appears.
When crushing natural stones, the minimum allowable outlet clearance is 100 mm (3.9 in). If set at less than 100 mm (3.9 in), it can
cause a damage on the crusher main body and premature wear of the jaw plates.
CRUSHABLE AMOUNT
The crushable amount shown in the catalog is a value measured under the condition of the best adjustment. In order
to gain the practical value in the ordinary crushing work, therefore, it is recommended to multiply the catalog value
by work coefficient of 0.6 to 0.75.
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