Flywheel device of roller shutter door

The utility model relates to the technical field of roller shutter door flywheels, and discloses a roller shutter door flywheel device which comprises a flywheel, a plurality of sets of positioning holes distributed at equal intervals are formed in the surface of the flywheel, a bearing is fixedly installed in the middle of the flywheel, an inner pipe is installed on the inner side of the bearing, and four sets of piston pipes distributed at equal intervals are arranged on an outer shaft of the bearing. The piston pipes communicate with the inner sides of the bearings, and the inner sides of the piston pipes in each set are movably connected with graphite columns. When the roller shutter door ascends and descends, the flywheel can rotate on the inner pipe, and in the rotating process of the flywheel, the four sets of knocking balls can vibrate up and down due to eccentricity and mechanical vibration, so that the graphite column is continuously knocked, the graphite column continuously moves towards the inner