request a quotation for venezuela navy

RFQ Description

We have a problem with shaft and propeller system in one navy tanker ship, It was building in HHIi in 2001, after investigationwe thing propeller is so many weight and than produce bending stresses no acceptable, more of 6000 Psi limit. we have intention of delete controllable pith propeller system and change for fixed propeller without controllable pith, for that we request to you a quotation for two new propeller but we sure you need next information:1.MAIN ENGINE model caterpillar 3616 max. continuos rating 6250 BHP x 900 RPM Idle speed 350RPM sense of rotation inward (when seen from ship´s aft) 2.REDUCCTION GEAR model Renk ASL 100 gear ratio 5,79: 1 horizontal off-set: 1000 MM gear weight (dry): 13000 KG3.C.P. PROPELLER AND SHAFTING SYSTEM model acb LIPS 5C10 Propeller speed : 155 RPM Sense rotation : outward (when seen from ship´s aft)The stresses calculation was according ten years ago between Venezuela Navy and HHI to the DDS methodinput data:Units: force: N Power: KW Length: mmthe data was converted in US units for calculationThe material of the shafts is forget steel equivalent to MIL-S-23284 class 3 with the following characteristics:Yield strength : 45000 psiFatigue limit : 34000 psithe outer diameter of shaft areAft flange: 797 mmaft part : 350 mmoutboard part: 330 mminboard part: 300 mmThe bore diameter of the shaft is 115 mmThe fillet radius between aft flange and aft part is 70 mmThe distance between the center of gravity of the propeller and the forward face the flange is 460 mmThe distance between the center of gravity of the propeller of the center of the bearing is 1074 mmThe maximum distance between bearings outboard is 10000 mmThe maximum distance between bearings inboard is 8211 mmPROPELLERType: Controllable pithnumber blades: 5Skew: wake adaptedDiameter: 3800 mmMass Aprox: 5205 Kg (1)Mass moment of inertia of propeller in air: 3426 Kgm2 (2)Mass moment of inertia of entrained water: 1472 Kgm2(1) including propeller shaft flange cover, but excluding propeller shaft flange itself, piston part propeller shaft and oil(2) including propeller shaft flange cover, propeller shaft flange, piston part of propeller shaft but excluding oil