SBD65-PB-40-76-2.2KW Schenck said that the items that must be checked when restarting the special reducer after a long-term shutdown are listed in the order that can be directly executed on site, which is simple and practical:
1. Status confirmation before shutdown
Record the length of shutdown, reason for shutdown, whether there are abnormal noises, oil leakage, overheating, large vibration and other abnormalities before shutdown.
Make sure the equipment is powered off, tagged out, and locked. Maintenance while powered on is strictly prohibited.
2. Appearance and installation inspection
1. Check the reducer body, motor, base, and torque support for corrosion, deformation, and cracking.
2. Check whether the anchor bolts and torque arm fixing bolts are loose, missing, or corroded.
3. Check whether there is any rust or sticking at the joint between the hollow shaft and the transmission shaft of the scale body.
4. Check whether the coupling/key/expansion sleeve is intact, not loose or damaged.
5. Check whether the connecting flange and the joint of the motor and reducer are displaced.
5. Check whether the installation level and coaxiality of the whole machine remain in their original state.
3. Lubrication system inspection (key points)
1. Open the oil drain/inspection port and observe the lubricating oil:
(1) Whether it is emulsified, water-infused, blackened, or has many impurities
(2) Whether it has been left to stratify or oxidize for a long time.
2. Measure the oil level: it must be above the center line of the oil glass/dipstick. If there is insufficient oil to replenish the oil, starting without oil is strictly prohibited.
3. For long-term shutdown (≥3 months), it is recommended to replace the oil directly with new oil:
Commonly used for cycloid + bevel gear structure: 220# or 320# heavy-duty industrial gear oil
4. Check whether the ventilation cap/respirator is blocked, water has entered, or dust has accumulated.
5. Check each joint surface and oil seal for signs of oil leakage or oil leakage.
4. Manual turning inspection (key! Direct inching is prohibited)
1. Disengage the load/coupling and turn the machine manually for at least 3 to 5 turns.
2. Check whether the rotation is:
Even and smooth
No stuck
No uneven weight
No metal friction or impact sounds
3. If the turning is heavy:
Possible internal corrosion, bearing lockup, gear jamming
Forced start is strictly prohibited and must be dismantled and inspected.
5. Electrical and speed measurement system inspection
1. Check whether the motor insulation, wiring and grounding are intact.
2. Check the wiring, fixation and wear of the tachogenerator/proximity switch/encoder.
3. Confirm that the control circuit, frequency converter, and brake (if any) are normal.
4. Confirm that the steering is consistent with the equipment requirements, and long-term reverse operation is strictly prohibited.
6. Seal and bearing inspection
1. Check whether the input and output shaft oil seals are aged, cracked or worn.
2. Check the bearing position for signs of corrosion, abnormal noise, or overheating.
3. If there is abnormal noise or rapid temperature rise in the bearing part, stop the machine immediately for inspection.
