WK series excavator is the large excavating equipment for open-pit mine developed by TZ. It combines the successful experience accumulated for years from manufacturing of mining shovels, at the meanwhile absorbs lots of advanced technology for design, processing, manufacturing and control from home and abroad. It is suitable both for stripping and excavating on open-pit coal mine, iron mine and ferro-metal mine.

WK series excavator has adopted state-of-art technology, like three-dimension imitation and definite circle analysis. It is of reasonable performance, working dimensions and exerts its efficiency to fully play to enhance the matching ability with all sorts of haul trucks and crush station to better satisfy the users’ requirements of higher loading and lowest producing cost.

Electric system adopts Rectifier/Regeneration to common DC Bus-bar and variable frequency speed adjustment. The electric control, taking PLC as the core, is a 3-stage system of up-position monitoring, field bus and frequency variable speed control. It is of futures of no disturbance to power grid allowing wider range of power voltage fluctuation and high power factor. The system is loaded with software to optimize the dig/cut curve and automatically optimization of hoist and dig power distribution. The system can realize self troubleshooting and running status display, electric power calculating and so on. This system has the advantages of state-of-art technology, reliable operation, high transmission efficiency and low power consumption.

WK-20 excavator is designed to match with mining trucks with capacity of 154MT to 220MT.

Technical characteristic:

• Gear-rack crowding, powerful penetration, high efficiency;

• Gear transmission uses gears of high hardness surface to have long life.