DONATI SOLLEVAMENTI S.r.l. - Via Quasimodo,17 - 20025 Legnano (MI) - Tel. 0331 14811 - E: [email protected]
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4.3.1 Setting up “DGT” sliding units onto a crane beam
•
“DGT” drive units are designed to be incorporated using an electric welding process on the
beam girders;
•
The structural element (beam frame) to which the “DGT” drive units can be welded can
comprise a beam or tubular section
(fig. 10)
, whose dimensions (height and width) are
compatible with the connecting plate on the drive units.
•
The joining welding between the “DGT” drive units and beam frame must be sized and
performed by the Buyer, taking into consideration the loads, geometric shape, material
S235JR-EN 10027, and applicable regulations..
To assemble the beams incorporating the “DGT” drive units using an electric welding
process, be sure to respect the tolerances prescribed by ISO regulation 8306/88
and FEM regulation 1.001/98 – book 8, i.e.
1.
The angle (
α
α
α
α
)
of the wheel axis with respect to a horizontal plane must be comprised b 0.2 % and –
0.05 %
2.
The angular deviation (
ϕ
ϕ
ϕ
ϕ
) of the wheels with respect to a theoretical horizontal plane must be:
•
±
0.06 % for beam girders classified up to service group M4 (1Am)
•
±
0.04 % for beam girders classified from service group M5 (2m) up to M8 (5m)
3.
The wheel centres (wheel axis) must not deviate more than
±
1 mm from the rail axis (track)
1.
2.
3.
fig. 10
Rail axis
Wheel axis
Wheel axis
Rail axis
Wheel axis
T
h
e
o
re
ti
c
a
l
p
o
s
it
io
n
o
f
w
h
e
e
ls
“DGT” drive unit
Endcarriage frame
“DGT” drive unit
Continuous weld
Continuous weld
Continuous weld
