With favorable properties over lifting, braking and property control, hydraulic lifting appliance plays
an important role in modernization drive. Being a symbol of social advance, hydraulic lifting appliance is
indispensable to civilization development. Much attention has been paid by lifting industry to the
efficiency, security and stability of hydraulic lifting appliance. With ceaseless development of science and
technology, more and more new technologies are applied to lifting appliance design. At the same time, the
once exist hydraulic oil leakage phenomenon is overcame gradually by the perfection of hydraulic
transmission technology and improvement of domestic hydraulic elements quality. As a result, wide
application of hydraulic transmission technology on lifting appliance is becoming an inevitable trend.
Beginning with the analysis on hydraulic system of the current hydraulic appliance, the essay conducts
analysis on hydraulic system with the purpose of improving properties of hydraulic system and finally
establishing a stable hydraulic system.