轴系的顶升试验及计算.pdf
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1、ROL 国ROYCE JRolls-RoyceREPORT PA0679 rev dBusiness Area Propulsion Propeller ApplicationAddress Rolls-Royce ABP.O.Box 1010S-681 29 Kristinehamn SWEDENTitleShaft Installation and Alignment CalculationTelephone+46 550 840 00Telefax+46 550 840 74Yard and Yard No.Damen Okean NB 7403Date2006-12-19Classif
2、icationLRS,Ice 1A+F/SAuthor(s)of reportPer HjerdtRRAB order No.500 877RRAB file No.11962Approved byAndreas MalmkvistAbstractThe alignment calculation is made to determine the following:Bearing loads,shaft stresses,optimal bearing offsets,slope boring evaluation and installation data(gap/sag values a
3、nd jack loads).Bearing offsets:A line through centre of bearing no.1 and no.2 defines the reference line.The gearbox bearing no 3 is positioned 1.15 mm below reference line and bearing no.4 is positioned 1.56 mm below reference line in cold condition.Alignment procedure:Gap and sag is measured inboa
4、rd between every shaft connection after launching.Jack load measurement is performed to verify the alignment.The input data comprises:Shafts geometry,propeller weight in water,thrust eccentricity and transverse forces from propeller and tooth forces on main gear wheel in running conditions.The therm
5、al expansion of the gearbox and the buoyancy effect of the water and oil in stern tube have also been considered.RevisiondRevision modificationAppendix 1 with alternative alignment and jack loadsDate071002Author(s)kk162Approved byMtaRevisioncRevision modificationDynamic movement changed from-0,02 mm
6、 to 0,12 mmDate070831Author(s)kk162Approved byWgoRevisionbRevision modificationPosition of fwd sterntube bearing,added jack,procedure updateDate070712Author(s)MtaApproved byWgoRevisionaRevision modificationAdded jack loads for warm static conditionDate070620Author(s)Kk162Approved byMtaKeywordsGroup
7、1:Group 2:Group 3:Rolls-RoyceROLLS f ROYCEPage 2 of 57 2007-07-12 Alignment report PA0679 rev d Damen Okean,NB 7403/11962/C12List of contents1 Introduction.1.1 Shaft alignment calculation.1.2 Description of the alignment program.1.3 Description of the calculation model.1.4 Plant particulars.1.5 Hull
8、 deflection influence.1.6 Gearbox alignment.1.7 Computed alignment conditions.2 Definitions and assumptions.3 Alignment calculation.3.1 Choice of alignment curve.3.2 Summary of bearing loads.3.2.1 MCR Warm condition.3.2.2 Cold static condition.3.2.3 Warm static condition.3.3 Slope boring evaluation.
9、3.3.1 Conclusion.3.4 Slope bore proposal.3.5 Bearing load range.4 Instruction for installation and alignment of shaft and gear4.1 Before the final alignment starts.4.2 Proposal of alignment procedure.4.2.1 In dry dock before launching:.4.2.2 Afloat after launching:.4.2.3 The SKF flange coupling.4.3
10、Gap and Sag information.4.3.1 Gap&Sag tolerances.4.3.2 GAP&SAG protocol.4.4 Jack load measurement.4.4.1 Verification of alignment of shaft line.4.4.2 Jack load acceptance criteria.4.4.3 Jack load procedure.4.4.4 Jack load positions.4.4.5 Jack up protocol.5 Calculation results.5.1 Shaft deflection pl
11、ot.5.2 Shaft stress plot.5.3 Shaft bending moment plot.5.4 Shaft slope,moment,stress and shear force.5.4.1 Vertical state,warm MCR condition.5.4.2 Vertical state,cold static condition.5.4.3 Horizontal state,warm MCR condition.5.5 Bearing loads.5.5.1 Vertical state.5.5.2 Horizontal state.Aft bearing.
12、5.6 Bearing influence numbers.5.6.1 Warm MCR condition.5.6.2 Cold static condition.5.7 Open shaft.5.7.1 Open shaft plot,propeller immersed.5.7.2 Open shaft slope,moment,stress and shear force.5.7.3 Gap and sag values.5.8 Jack load values cold condition.5.9 Jack load values warm static condition.e444
13、45556 70 12UI 1 di789901231111222224222222333333333333448 8 9 9 9 9 0133 4 4 4 6 7UI UI.1.1 4 di圖Rolls-RoycePage 3 of 57 2007-07-12 Alignment report PA0679 rev d Damen Okean,NB 7403/11962/C126 Input data.41Appendix 1.466.1 Shaft deflection plot.476.2 Open shaft plot.486.3 Gap&Sag values.496.4 Jack l
14、oads positions.506.5 Jack load values.516.5.1 Cold static.516.5.2 Warm static.516.6 Input data.52Page 4 of 572007-07-12Alignment report PA0679 rev dDamen Okean,NB 7403/11962/C12Rolls-Royce1 Introduction1.1 Shaft alignment calculationThe calculations are based on following information:CompanyRR drawi
15、ng no.TitleRolls-Royce AB Reintjes Rolls-Royce AB167300 rev a.0-429-72506 167338 rev a.Shafting arrangement Gearbox,SVA 1050B K41 Aft stern tube bearingRolls-Royce AB167341-SKF OKFA coupling 380The alignment calculation of the shaft system has been carried out by using the alignment program from Sha
16、ft Analysis AB rev.98-10.1-2 Description of the alignment programThe Alignment program uses the transfer matrix method for solving the equations.All state quantities are related to the x-axis that coincides with the shaft centre line and points forward.The shaft line is modeled as elements with diff
17、erent characteristics.The distribution of mass is continuous in shafts and flanges,and concentrated(discrete)in the other element types.The system is considered to have fixed positions at the bearings.1.3 Description of the calculation modelThe propeller hub has been modeled as a mass element in the
18、 centre line of the blades and geometry with a density close to zero to show the hub outline in the graphic plot.The mass of the entrained water is added as a separate post in the model and the program adds it to the propeller mass.At the flanged shaft connection,the flanges are assumed to have cont
19、act outside the pitch circle of coupling bolts.In the gearbox,the output shaft has been calculated with the actual dimensions and weights.Due to complex geometry,parts of gear wheel have been modeled as point mass acting on gear wheel centre.Page 5 of 572007-07-12Alignment report PA0679 rev dDamen O
20、kean,NB 7403/11962/C12Rolls-Royce1.4 Plant particularsGeneral informations:Propeller4 blades C.P.propeller 2 x 121XF5/4E-BGearReintjes SVA 1050B K41Main-engineMAK6M43CPropellerDiameter4.95 mWeight in air(including oil)i 13 577 kgWeight fully submerged in water MaterialPropeller speedI 11 462 kg:Ni-A
21、I-bronze120.9 rpmEngineMCR condition6 000 kWEngine speed500 rpmAlignment Data:Vertical bending moment due to thrust eccentricity at propeller:86 kNm(upwards)*Horizontal bending moment due to thrust eccentricity at propeller:117 kNm(towards port)*Vertical hydrodynamic force acting in propeller centre
22、:i 33 kN(upwards)*Horizontal hydrodynamic force acting in propeller centre:20 kN(towards starboard)*estimations based on wake field from similar vessels.1-5 Hull deflection influenceDuring normal usage of a vessel,the vessel varies between a light ship condition and heavy ship condition.The light sh
23、ip condition occurs when the vessel has little deadweight onboard.The heavy ship condition occurs when the vessel is in full loaded,with full deadweight,condition.The different loading conditions influences the hull deflection of the vessel.The hull deflection of the vessel is an important factor in
24、fluencing static bearing loads.If these hull deflections are known,the changes in offset at the bearing positions can be calculated and the resultant effect on bearing loads can be assessed.This is to be considered by the yard.1.6 Gearbox alignmentThe calculation is based on information Rolls-Royce
25、AB received from the gearbox manufacturer.Rolls-Royce takes no responsibility for the correctness of the in data delivered by the gearbox manufacturer.The alignment recommendation in this report takes the requirements for the gearbox made by the gearbox manufacturer into account.Page 6 of 572007-07-
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