15
BASIC STRUCTURE AND WORK PRINCIPLE
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Overview on Excavators
Excavator is composed of power train, work equipment, swing mechanism,
control mechanism, drive system, raveling mechanism and auxiliary cquipment,
as shown in fig. 1-1. Mounted on the rotary table are the regular full-swing type
hydraulic excavators, main components of drive system, swing mechanism and
auxiliary devices, which are referred to as upper rotary. Therefore, a excavator
is divided into work equipment, upper rotary and traveling mechanism.
Work Principle of Excavators
Diesel engine changes the chemical energy of diesel into mechanical energy
that is then altered with hwdraulis gear pump to hydraulic energy that is
distributed to each actuating element (such as hydraulic cylinder, swing motor
and traveling motor). Ater that, each actuating ekment transform the lhydraulic
energy back to mechanical energy, driving the work equipment and running the
complete machine.
