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Process Engineering Equipment Handbook 2009 Part 13

Tham khảo tài liệu 'process engineering equipment handbook 2009 part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Power Transmission P-77 TABLE P-6 Service-Factor Values Application Service Factor Prime Mover Motor Turbine Internal-Combustion Engine Multicylinder Blowers Centrifugal 1.4 1.6 1.7 Lobe 1.7 1.7 2.0 Compressors Centrifugal process gas except air conditioning 1.3 1.5 1.6 Centrifugal air-conditioning service 1.2 1.4 1.5 Centrifugal air or pipeline service 1.4 1.6 1.7 Rotary axial flow all types 1.4 1.6 1.7 Rotary liquid piston Nash 1.7 1.7 2.0 Rotary lobe-radial flow 1.7 1.7 2.0 Reciprocating three or more cylinders 1.7 1.7 2.0 Reciprocating two cylinders 2.0 2.0 2.3 Dynamometer test stand 1.1 1.1 1.3 Fans Centrifugal 1.4 1.6 1.7 Forced-draft 1.4 1.6 1.7 Induced-draft 1.7 2.0 2.2 Industrial and mine large with frequent-start cycles 1.7 2.0 2.2 Generators and exciters Base-load or continuous 1.1 1.1 1.3 Peak-duty cycle 1.3 1.3 1.7 Pumps Centrifugal all service except as listed below 1.3 1.5 1.7 Centrifugal boiler feed 1.7 2.0 . Centrifugal descaling with surge tank 2.0 2.0 . Centrifugal hot oil 1.5 1.7 . Centrifugal pipeline 1.5 1.7 2.0 Centrifugal waterworks 1.5 1.7 2.0 Dredge 2.0 2.4 2.5 Rotary axial flow all types 1.5 1.5 1.8 Rotary gear 1.5 1.5 1.8 Rotary liquid piston 1.7 1.7 2.0 Rotary lobe 1.7 1.7 2.0 Rotary sliding vane 1.5 1.5 1.8 Reciprocating three cylinders or more 1.7 1.7 2.0 Reciprocating two cylinders 2.0 2.0 2.3 Marine service Ship s service turbine-generator sets . 1.1 . Turbine propulsion . 1.25 . Diesel propulsion . . 1.35 Figures P-15 and P-16 show sections through a typical turbine-driven marine propulsion reduction gear. It will be noted that the high-speed pinions each mesh with two first-reduction gears thereby splitting the power from each turbine. These twin-power-path gears or so-called locked-train gears are popular in the horsepower range of 30 000 shp and up. Figures P-17 and P-18 show sections through a typical diesel-driven marine propulsion reduction gear. In this arrangement each pinion is fitted with a pneumatically operated clutch .