Aplication of DDVC hydraulic system in axia flow fan stator blade adjustment

The axial flow fan is a kind of turbomachinery equipment to provide compressed gas and the statorblade adjusting mechanism is the key to the whole system. Taking the stator blade adjustment electro-hydraulicservo system as the research object, the traditional hydraulic servo system is vulnerable to oil pollution, high fail-ure rate and low energy conversion efficiency. To solve the above-mentioned problems, the Direct drive volumecontrol hydraulic system for stator blade adjustment is designed, the hydraulic power source of the system is com-posed of servo motor and bidirectional quantitative pump. The working principle of this system is analyzed, thesimulation model of hydraulic system is built and solved. The results show that the new system has higher energyefficiency, the structure is more compact, the machine power is smaller and the control is more automatic and in-telligent as compared to the traditional one.