DESIGNING IS OUR GAME
Reference
MODERNIZATION OF CONVEYOR CARRIAGE PVZ 2500-45/27 NO. 16 - NOEN, a.s.
General description
The order included modernization of the belt carriage PVZ 2500 – 45/27. The machine is placed in the DNT Tušimice under operation number 16. The modernization scope included the following parts of the machine.
Use of the machine together with the KU 300 bucket wheel excavator, 1:9 upslope in the direction of the machine travel without having to level the terrain or without jeopardizing the existing machine stability with a permissible inclination of 1:20. A hydraulically controlled tilting plate was inserted between a crosspiece of the crawler undercarriage and a frame of the central structure. Tilting of the undercarriage against the rest of the machine makes it possible to travel on uneven ground.
- An increase of the unloading boom reach up to -7 m under the level of the surface for travelling.
- An increase in throughput of the charging hoppers and a change in construction of the impact area with a sliding impact bed.
- Reconstructions of selected machine units.
Reconstructions proposed did not affect the other working areas of the machine nor reduce their operating parameters.
Main parameters of machine
| Nominal conveying capacity | 2,500 | m3.hod-1 | ||||||
| Material (coal) to be conveyed – specific design weight of excavated material | 1,000 | kg.m-3 | ||||||
| Conveying distance | 72.3 | m | ||||||
| Speed of travel | 360 | m.hod-1 | ||||||
| Medium specific pressure | 0.0956 | MPa | ||||||
| Loading boom: | – belt width | 1,200 | mm | |||||
| – belt speed | 4 | m.s-1 | ||||||
| – boom length | 27 | m | ||||||
| Unloading boom: | – belt width | 1,200 | mm | |||||
| – belt speed | 5 | m.s-1 | ||||||
| – boom length | 45.3 | m | ||||||
| Troughability of top strand of conveyor belt | 30° | |||||||
| Troughability of bottom strand of conveyor belt | 10° | |||||||
| Range of slewing: | – loading boom on ground | ± 9° | ||||||
| – loading boom suspended | ± 36° | |||||||
| Slewing speed of unloading boom end | 13.8 | m.min-1 | ||||||
| Pitch of loading boom | 18° | |||||||
| Pitch of unloading boom | – upward | +15° | ||||||
| – downward | -20.4° | |||||||
| Height of discharge chute of unloading boom | – maximum | 16.5 | m | |||||
| – minimum | -7 | m | ||||||
| Pitch during conveying – boom in direction of travel | 1:6 | |||||||
| Pitch during work in direction of travel: | – nominal | 1:9 | ||||||
| – maximum | 1 : ~8 | |||||||
| Inclination of slewing gear during work in direction of travel | ± 1 : 72 | |||||||
| Inclination during work in transverse direction to travel | 1:20 | |||||||
| Stroke of hydraulic cylinders: | – for nominal inclination of 1:9 | 400 | mm | |||||
| – for max. inclination of 1: ~8 | 450 | mm | ||||||
| Hydraulic cylinder: | – max. pushing force | 1,997 | kN | |||||
| – max. pulling force | 1,022 | kN | ||||||
| – nominal stroke | 457 | mm | ||||||
| Hydraulic unit – working pressure | 700 | bar | ||||||
