Energy-saving ways for friction welding hydraulic systems

To resolve the problems of the friction welding machine hydraulic systems with fixed displacement pump,such as large energy consumption,quick oil temperature rising and instability of welding pressure parameter,the energy-saving hydraulic system is developed,which includes the force applying system with the proportional variable displacement pump under the computer-controlled and the auxiliary system with the constant pressure variable displacement pump. The energy-saving principle of the new hydraulic system is analyzed,and the energy consumption performances of the two type hydraulic systems are tested. The results showed that under the same condition,the energy-saving hydraulic system could reduce energy consumption by 57% compared with the ordinary hydraulic system. The energy savings are very effective during the stages of pre-weld,friction and forge. The energy-saving hydraulic system has good features of higher energy efficiency,lower energy consumption and better energy saving,and has been used in industry.