nord 6052902/0213, Manual With Installation Instructions

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4 Commissioning
B 1050 en-3921 71
Gear unit Stages
Nominal gear ratio i
N
Lift-off speed
n
1
[rpm]
From to
SK 15207 2 5.6 20 220
SK 15307 3 22.4 112 250
12.5 28 310
SK 15407 3 31.5 45 479
50 71 781
SK 15507 4 80 400 886
Table 9: Back stop lift-off speeds SK 11..07 – SK 15..07
Gear unit Stages
Nominal gear ratio i
N
Lift-off speed
From to n
1
[rpm]
SK 5217 / SK 6217 2 6 8 499
SK 5217 / SK 6217 2 10 14 809
SK 5217 / SK 6217 2 16 22 1308
SK 7217 / SK 8217 2 6 8 451
SK 7217 / SK 8217 2 9 13 697
SK 7217 / SK 8217 2 16 20 1136
SK 9217 / SK 11217 2 6 8 352
SK 9217 / SK 11217 2 9 13 545
SK 9217 / SK 11217 2 16 21 887
Table 10: Back stop lift-off speeds SK 5..17 – SK 11..17
4.12 Test run
During commissioning of the gear unit a test run should be carried out in order to detect any problems
prior to continuous operation.
During a test run under full load, the gear unit should be checked for:
• Unusual noises, such as grinding, knocking or rubbing noises
• Unusual vibrations, oscillations or other movements
• Production of steam or smoke
After the test run, the gear unit should be checked for:
• Leaks
• Slippage of the shrink discs. To do this, remove the cover and check whether the marking specified
in Section 3.6.2 "Fitting a hollow shaft with shrink disc (Option: S)"indicates a movement of the
gear unit hollow shaft relative to the machine shaft. Then remount the cover as described in
Section 3.14 "Installing the cover cap, air baffle (Option: H, H66, FAN, MF.., MS…)".
Information
Radial shaft seals are rubbing seals and have sealing lips made from an elastomer material. These
sealing lips are lubricated with a special grease at the factory. This reduces the wear due to their
function and ensures a long service life. An oil film in the region of the rubbing sealing lip is therefore
normal and is not due to leakage.