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The Design of Rolling Bearing Mountings (FAG Bearing Co) Episode 7

Tham khảo tài liệu 'the design of rolling bearing mountings (fag bearing co) episode 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 74 Rope return sheaves of a passenger ropeway In this example of a passenger ropeway eight sheaves are installed at the mountain station and another eight at the valley station including the sheaves in the valley station tensioning weight pit. The sheave diameters are 2.8 and 3.3 meters. Bearing selection dimensioning The valley station sheaves and the tensioning weight sheaves are fitted with spherical roller bearings FAG 22234E. The sheaves at the mountain station are supported by spherical roller bearings FAG 22240B.MB. The load on the bearings FAG 22234E installed in the tensioning weight sheaves is P 65 kN each with a dynamic load ratingC 1 100 kN and a speedfactor fn 0.838 corresponding to a speed of 60 min-1 the index of dynamic stressing fL C P fn 1 100 65 0.838 14.2. This shows that the bearings are more than adequately dimensioned with regard to fatigue life. The one-piece sleeve carrying the bearings allows convenient changing of the rope sheaves. Machining tolerances The outer rings carry circumferential load and require therefore a tight fit. To safeguard the spherical roller bearings against detrimental axial preloading the design is of the floating mounting type. The outer rings are securely locked via the two covers by means of a spacer ring. The centre lip of sleeve H is slightly narrower than the spacer so that the sheave can float axially on the sleeve via the loosely fitted inner rings. The sleeve is locked to prevent it from rotating with the inner rings. Sleeve to g6 hub bore to M6 The sleeve has a sliding fit on the shaft. Lubrication sealing Grease lubrication with FAG rolling bearing grease Arcanol L186V Relubrication by means of lubricating holes in the shaft. A shaft seal ring in the covers provides adequate protection against contamination. 74 Rope return sheaves of a passenger ropeway 75 Rope sheave underground mining These sheaves are arranged in the head frames of the pits. The rope fastened to the cage runs from the drive sheave or .