Excavating machinery generally consists of a power device, a transmission device, a walking device and a working device. Single bucket excavators and bucket wheel excavators also have turntables, multi-dump excavators and material handling devices.
The power unit has a diesel engine, an electric motor, a diesel generator set or an external power converter unit. Diesel engines and electric motors are mostly used in medium and small excavation machines, and are driven centrally by a prime mover, which are interchangeable. Diesel generator sets and external power converter units are used for large and medium-sized excavation machines, which are driven by multiple motors.
The traveling device is mainly used to support the machine, change the working position of the machine and transfer the working site; in addition, the bucket of the chain bucket excavator and the ring wheel excavator cuts the soil as the walking device continuously walks. The walking gears are crawler type, tire type, walking type, rail type, floating type and trailer type.
If the working site is fixed, the required grounding ratio is lower, the track type is used; when the working site is changed, the tire type is used; when the special construction condition is required, the special track must be used, the rail type is used; the underwater mud is used for floating; small single When the running device of the bucket excavator has no power source, the trailer type is used; when the work site is fixed and the weight of the machine is large, the walk type is used. Walking type walkers are mostly used for large and medium dragline excavators and bucket wheel excavators in single bucket excavators.
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