tailieunhanh - Process Engineering Equipment Handbook Episode 3 Part 1

Tham khảo tài liệu 'process engineering equipment handbook episode 3 part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | P-116 Power Transmission Output Alternator Motor Exploded view of the type MS-85-S Synchronous Clutch Coupling Input Gas Turbine FIG. P-62 Components of the MS-85-S clutch coupling. Source MAAG Gear Company. The gears are carburized hardened and ground. Normally single helical gears are used. They are calculated in accordance with MAAG design criteria or to AGMA ISO or API standards with a service factor of not less than . The shafts are supported in babbitted lined bearings. Each shaft may be provided with an integral thrust bearing. The gears can be equipped with thrust cones to compensate the gear thrust and to transfer thrust loads from one shaft to the other. The basic gear design options are shown in Fig. P-70. Design details Tooth modifications. Gears and pinions under load suffer elastic deflections and their temperatures are raised unevenly. Deformations and thermal expansion have detrimental effects on the tooth engagement. The tooth flanks are therefore modified during grinding to achieve an ideal load distribution at the rated load and speed. Compensation for thermal effects is absolutely vital on high-speed gears. Journal bearings. Pressure-lubricated three- or four-lobe bearings provide excellent load capacity and journal stability. Gears that operate at extreme velocities are equipped with direct lubricated tilting pad radial bearings. Power Transmission P-117 FIG. P-63 Schematic of the MS-85-S in a working assembly. Source MAAG Gear Company. FIG. P-64 Automatic turning gear clutch type MS-8-T installed in gearbox between turning gear and pinion shaft. Source MAAG Gear Company. Thrust bearings. Standard tilting pad thrust bearings with direct lubrication are provided if required. They are always located at the free shaft ends. Thrust cones. The thrust faces are slightly cone-shaped and surface hardened and ground. They are lubricated by oil from the meshing .