DETERMINATION OF PREVENTIVE MAINTENANCE TIME
2017-5-3 · maintenance time and the determination of how much Fig. 1. Coal mill construction: 1 – mill jacket, 2 – drive gear unit, 3 – installation door, 4 – milling ball, 5 – mill yoke (bowl), 6 – crushing ring (ball race), 7 – pressure ring, 8 – thrust ring, 9 – pressure spring, 10 – tensioning bolt, 11 – pivoting apron,
