Improvement of aluminum foil lubricating device in YB47 packer

To solve the problems of interrupted oil supply in pipeline, filter pad jam and atomizer leakage, the aluminum foil lubricating device in YB47 packer was improved as following: 1) replacing original nozzle by an pneumatic adjustable atomizing nozzle; 2) removing oil atomizer and designing a new lubricant container with a designed volume of 2 000 mL, enough to support the equipment running for 200 hours. The major design parameters for the lubricating device determined via experiments were air pressure 150 kPa; foil lubricating functioning while machine running in a speed range of 200-550 packet/min; nozzle: spraying duration 30 sec at 35 sec interval; the installation height of nozzle 20 mm above aluminum foil conveying platform. The results showed that the improved system was simple in structure and ran stably, the amount and width of sprayed lubricant were controlled within 10±0.8 mL/hour and 20±1.5 mm, respectively. Aluminum foil was well lubricated and folded, and the running cost of equipment was reduced.