Repair, overhaul and service for electric motors, gearboxes, pumps and cranes in Willich
HEMPEL Elektromaschinenbau GmbH
Willich (Siemensring 29, 47877)New on Amplifa
Expertise in the maintenance of rotating machinery
HEMPEL Elektromaschinenbau GmbH has specialised in the repair of industrial plants since 1950 and forms the core company of the HEMPEL group, whose origins, according to company information, date back to 1849. The company repairs, maintains and optimises rotating electrical machines such as three-phase and DC motors, generators, servo motors, vibrators and slip-ring rotors up to 4,000 kW and 11 kV. At its own repair plant in Willich (crane capacity 16 tonnes), rewinding, vacuum impregnation, balancing and mechanical repairs are carried out; certified repair of explosion-protected motors in accordance with DIN EN 60079-19 is part of the portfolio, as is acceptance testing of pumps according to DIN EN ISO 9906 on an in-house test stand. The workshop services are complemented by on-site service, installation and commissioning, engineering, frequency converter service, condition monitoring and a 24-hour emergency service. Customers come mainly from chemicals, pulp & paper, power plants, iron and steel, aluminium, shipbuilding and the process industry.
- Site
- Willich
- Processes
- Repair and overhaul of electric motors (repair, maintenance, optimisation of rotating, Rewinding / winding work on motor windings (low voltage up to BG 710,, Vacuum impregnation of electric motors, generators and transformers, Balancing of electric motor rotors, fan wheels, pulleys, pump impellers and rotating, Mechanical repairs (bearings, fits, build-up/bushing of shaft seats), Certified repair of explosion-protected motors and equipment according to DIN EN 60079-19, In-service balancing on site (mobile balancing of installed rotors), Laser alignment of motors and assemblies
- Materials
- Three-phase motors (asynchronous/synchronous), DC motors, Servo motors, Geared motors, Vibrators and unbalance motors, Slip-ring rotors, Three-phase shunt motors, Synchronous reluctance motors
- Certificates
- Pump acceptance testing according to DIN EN ISO 9906 / DIN EN 10204, Ex repair according to DIN EN 60079-19, Crane inspections according to BetrSichV / DGUV 52 §26 and 54 §23, Protocol archiving (repair documentation, min. 10 years)
- Founded
- 1950
- Industries
- Chemicals, Pulp and Paper, Power plants, Iron and steel, Aluminium, Shipbuilding
- 01
Fault analysis and technical diagnostics
- 02
Repair / overhaul at the repair plant or on site
- 03
Rewinding and vacuum impregnation
- 04
Balancing, laser alignment and mechanical repair
- 05
Acceptance testing (pump test stand, performance test stand)
- 06
Installation, commissioning, condition monitoring and 24-hour emergency service
Drive technology and processes
Electric motors (three-phase, DC, synchronous/asynchronous)
Repair, maintenance and optimisation of low-voltage and medium-voltage motors up to 4,000 kW and 11 kV.
Servo motors
Overhaul including encoder/feedback system service and acceptance testing according to IEC standard.
ATEX motors (DIN EN 60079-19)
Certified repair of explosion-protected motors with officially recognised Ex experts.
Gearboxes and geared motors
Overhaul, replacement of bearings and wear parts as well as reproduction of unavailable pinions and hollow shafts.
Industrial pumps (centrifugal and positive displacement pumps)
Brand-independent repair, overhaul and acceptance testing up to DN100 suction side / DN80 pressure side.
Crane and lifting technology (chain/rope hoists, lifting magnets)
Overhaul, repair and inspections according to BetrSichV in conjunction with DGUV 52 §26 and 54 §23.
Frequency converters and control technology
Installation, commissioning, fault analysis, repair and retrofit.
Windings (copper, form-wound and bar coils)
Rewinding of low-voltage, medium-voltage, DC and bar windings in the armature winding shop.
Vacuum impregnation (resins)
Impregnation of electric motors, generators and transformers for improved performance and service life.
Site
Willich
DEHeadquarters and repair plant
- Part weight / size
- Components up to 16 t (crane capacity)
- Lot size
- Single-unit production and service orders
- Materials
- Electric motors, generators, gearboxes, pumps, cranes, frequency converters
- Crane up to 16 t
- Pump test stand (up to DN100 suction side / DN80 pressure side)
- Performance test stand for crane products
- Armature winding shop
- Vacuum impregnation system
- Balancing machine
- Vibration measuring system
Repaired components and assemblies
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Repair and overhaul of electric motors (repair, maintenance, optimisation of rotatingAssembly | – | – | – | – | Electric motors, Generators |
| Rewinding / winding work on motor windings (low voltage up to BG 710,Assembly | – | – | – | – | Copper windings, Resin (impregnation) |
| Vacuum impregnation of electric motors, generators and transformersSurface | – | – | – | – | Resins |
| Balancing of electric motor rotors, fan wheels, pulleys, pump impellers and rotatingTesting | – | – | – | – | – |
| Mechanical repairs (bearings, fits, build-up/bushing of shaft seats)Assembly | – | – | – | – | – |
| Certified repair of explosion-protected motors and equipment according to DIN EN 60079-19Testing | – | – | – | – | explosion-protected motors, fans, pumps, belt drives, brakes, gearboxes |
| In-service balancing on site (mobile balancing of installed rotors)Testing | – | – | – | – | – |
| Laser alignment of motors and assembliesAssembly | – | – | – | – | – |
| Lubrication service for plants (lubricant selection, delivery, warehousing, re-lubrication)Assembly | – | – | – | – | Lubricants |
| Gearbox repair and overhaul (revision, replacement of bearings/seals/wear parts,Assembly | – | – | – | – | – |
| Testing and reworking of gears and gear teethMachining | – | – | – | – | – |
| Geometric measurement of gearbox componentsTesting | – | – | – | – | – |
| Running tests of gearboxes and geared motors (incl. heating, vibration and noise measurement)Testing | – | – | – | – | – |
| Vibration analysis (gearboxes, pumps, plants)Testing | – | – | – | – | – |
| Repair, overhaul and acceptance testing of industrial pumps on the in-house pump test standTesting | – | – | – | – | Water-glycol mixture (20 mPa*s), White oil (20 mPa*s) |
| Pump repair on site (seals, bearings, pump impellers, wear parts, alignment,Assembly | – | – | – | – | – |
| Pump vibration analysis and condition monitoring / predictive maintenanceTesting | – | – | – | – | – |
| Repair and overhaul of crane systems and lifting technology (chain hoists, rope hoists, gearboxes,Assembly | – | – | – | – | – |
| Final testing of crane products on performance test standsTesting | – | – | – | – | – |
| Crane inspections according to BetrSichV in conjunction with DGUV 52 §26 (cranes) and 54 §23Testing | – | – | – | – | – |
| Installation and commissioning on site (motor/gearbox/pump replacement, rolling bearing replacement,Assembly | – | – | – | – | Electric motors, Gearboxes, Pumps |
| Condition monitoring and predictive maintenance (vibration measurements, electrical and mechanicalTesting | – | – | – | – | – |
| Engineering and project management for industrial plants (concept phase, analysis, planning,Engineering | – | – | – | – | – |
| Frequency converter service (installation, commissioning, fault analysis, repair, replacement)Assembly | – | – | – | – | – |
| Servo drive overhaul (mechanical repair, encoder/feedback system service, balancingTesting | – | – | – | – | – |
| Electrical repair, testing and maintenance of electric motors and generators up to 4,000 kW and 11Assembly | – | – | 16 tonnes (crane capacity) | – | Three-phase motors, DC motors, Generators |
| Design and trading of electric motors, gearboxes, pumps and frequency converters (procurement,Engineering | – | – | – | – | – |
| Control technology and retrofit (control systems for electric motors, gearboxes, pumps)Engineering | – | – | – | – | – |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Crane (repair plant) | – | – | – | – | Willich |
| Pump test stand (acceptance testing up to DN100 suction side / DN80 pressure side) | – | 1 (in-hous | DN100 suction side, DN80 pressure side | – | Willich |
| Performance test stand (crane products) | – | – | – | – | Willich/Zeitz |
| Armature winding shop (rewinding) | – | – | Low voltage up to BG 710, medium-voltage form-wound coils, DC form-wound coils, bar windings | – | Willich |
| Vacuum impregnation system | – | – | – | – | Willich |
| Balancing machine (balancing of rotors, fan wheels, pulleys, pump impellers) | – | – | – | – | Willich |
| Mobile balancing device (in-service balancing of installed rotors) | – | – | Rotors of almost any size and weight class | – | on site at customer |
| Laser alignment device (line and point laser systems) | – | – | – | – | on site at customer |
| Video endoscope (gearbox inspection) | – | – | – | – | on site at customer |
| Vibration measuring system (condition monitoring) | – | – | – | – | Willich / on site |
Additional services
Reference customers
Quality and testing
Quality assurance includes, among other things, acceptance testing of pumps on the in-house test stand in accordance with DIN EN 10204 and DIN EN ISO 9906 with acceptance test certificate 3.1 or 3.2 as well as running, geometry and vibration tests. The repair of explosion-protected motors is carried out in accordance with DIN EN 60079-19/-17 by six officially recognised Ex experts in Willich and Zeitz.
| Evidence | Willich |
|---|---|
| Pump acceptance testing according to DIN EN ISO 9906 / DIN EN 10204 | |
| Ex repair according to DIN EN 60079-19 | |
| Crane inspections according to BetrSichV / DGUV 52 §26 and 54 §23 | |
| Protocol archiving (repair documentation, min. 10 years) |
Company history
- 1849
Origin of the HEMPEL company history (according to company information)
- 1950
Foundation of HEMPEL Elektromaschinenbau by Erich and Hilde Hempel as a repair shop for electric motors in Willich
- heute
The HEMPEL group 'HEMPEL Industrial Maintenance' comprises ten competence centres, including control technology and pump technology