
Gearmotor/Reducer
Key
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repairs in 2017
repair experts at your service
test benches
Reducers repair
at DV Group
A process guaranteeing a 100% functional product
DV Group expertise in gear reducer repair is divided into
Operational expertise
- Infrared thermography: abnormal heating (loading and lubrication areas).
- Measuring vibrations: faults with meshing, bearings, jarring of mechanical parts.
Downtime Expertise
- Endoscopy Inspection with housing open: teeth, shafts, surfaces, sealing.
Technical procedures / test procedures:
Procedure before dismantling
- Mechanical inspection: general condition, casing, shaft, etc.
- Check lubrication and cooling circuits.
Dismantling inspection procedure
- Geometric checking of casing. Inspection of tooth contact surfaces.
- Search for common deteriorations (pitting, spalling, chippings, etc.).
- Metrological check of casing, flanges and shafts: bearing seatings, joint surfaces.
- Dyeing of shaft connection radii and keyways.
- Magnetoscopy inspection of all gear teeth.
- Inspection of heating, sealing and lubrication (metal tearing, general appearance, leakage, etc.).
Repair Procedure
-
- Replacement of bearings, joints, sealing.
- Adjustment of the bearing play and teeth contact surfaces.
- Repair: chromage, ringing, refilling.
- Recording of defective gears using the model.
- Repair of the ends of shafts and housings using a dedicated soldering or stapling process.
- Replacement and adaptation of lubrication units (manometer, flow meter, pressurestat, filters) and piping.
Testing / validation procedure
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- No-load tests running on a platform up to 1,600 kW.
- Reduction validation, output speed.
- Testing of sealing and assembly position: vents.
- Choice of lubrication adapted according to criteria: load, temperature, assembly position, process.
- Measurement and vibratory signature.
Traceability procedure
- Diagnosis and testing history.
- Traceability produced by: machine number / customer number / DV GROUP number.
- Test sheet and qualification/test certificate.
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