Name of construction: Complex renewal of Tušimice Power Plant II
Construction No.: ST 130060
Place of construction: ČEZ, a.s., Elektrárny Tušimice, 432 01 Kadaň
Region: Ústecký
Investor: ČEZ a.s., Duhová 2/ 1444, 140 53 Praha 4
Parameters of bucket wheel loader
| Type designation | N2000x50 | |
| Conveying capacity of machine – theoretical | 2,000 | m3/h |
| Repose angle of side and front slopes of stockyard | 35 up to 40 | ° |
| Maximum height of stockyard | 11 | m |
| Maximum width of stockyard | 45 | m |
| Loader can work at wind speed | to max. 17 | m/sec |
| Span of machine | 50 | m |
| Wheelbase of travelling units | 10 | m |
| Diameter of bucket wheel over bucket cutting edges | 10.8 | m |
| Bucket wheel axis height above plane of machine travel rails | 5.55 | m |
| Total working length of bucket wheel along bridge structure | 41.7 | m |
| Loader width (with breakers in tilted positions) | 25 to 35.5 | m |
| Number of buckets | 10 | |
| Theoretical volume of one bucket | 1,000 | dm3 |
| Bucket wheel speed | approx. 4.2 | rpm |
| Travelling speed of bucket wheel carriage (controlled by frequency converter) | approx. 5 to 20 | m/min |
| Width of conveyor belt on bucket wheel loader | 1.6 | m |
| Nominal speed of conveyor belt | 2.1 | m/sec |
| Travelling speed of loader (controlled by converter) | approx. 4 to 20 | m/min |
| Installed power in total | approx. 275 | kW |
| Assumed concurrence | approx. 231 | kW |
| Basic operation voltage – supply | 3PE ~50 Hz | 6,000 V / IT |
| Basic operation voltage – motor | 3NPE ~50 Hz | 400 V / TN-S |
| Weight of loader | 310 | tons |
Within the framework of coal handling in the ČEZ, a.s. Tušimice Power Plant (ETU II), reconstruction of the bridge bucket wheel loaders in the mechanical part, steel structures and electrical equipment was performed.
Mechanical equipment:
Loader travel – the new one including drives with frequency converters
Loader hydraulic system – total overhaul
Conveying line – revision and repair of rollers, bearings and scrapers, the new drive including a driving drum shaft
Bucket wheel carriage travel drive – revision of travelling wheels, new drives with frequency converters
Breaker lift drive – revision of the rope drum and pulleys, the new drive including a lift rope
Bucket wheel drive – the new drives including a frame, the new central lubrication, revision of pulleys
Lining of transfer points and buckets, revision of a festoon trolley, new limit switches and sensors
Steel structures:
Revision and repair of supporting steel structures, the new bucket wheel steel structure and gear ring.
Repair of the switching station structure and the operator’s cabin.
The new discharge hopper steel structure.
Electrical equipment:
Starting of main drives controlled by frequency converters, starting of the bucket wheel and the conveyor belt controlled by the soft starter.
The new switchboards, main and lighting transformers, lighting and control systems, replacement of all the cables, internal festoon trolleys are replaced with energy chains.
The existing paints were touched up, new paints were applied on new structures, new labels and signs were performed, grease and oil fillings were changed.
