1、BSI Standards PublicationBS ISO 484-1:2015Shipbuilding Ship screwpropellers ManufacturingtolerancesPart 1: Propellers of diameter greater than2,50 mBS ISO 484-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 484-1:2015.The UK participation in its preparat
2、ion was entrusted to TechnicalCommittee SME/32, Ships and marine technology - Steeringcommittee.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsib
3、le for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 89428 2ICS 47.020.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Poli
4、cy and Strategy Committee on 31 December 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 484-1:2015 ISO 2015Shipbuilding Ship screw propellers Manufacturing tolerances Part 1: Propellers of diameter greater than 2,50 mConstruction navale Hlices de navires Tolran
5、ces de fabrication Partie 1: Hlice de diamtre suprieur 2,50 mINTERNATIONAL STANDARDISO484-1Second edition2015-12-01Reference numberISO 484-1:2015(E)BS ISO 484-1:2015ISO 484-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in SwitzerlandAll rights reserved. Unl
6、ess otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the
7、address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 484-1:2015ISO 484-1:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative re
8、ferences 13 Field of application 14 Methods for measuring pitch 14.1.1 Use of marking gauges 14.1.2 Method with a graduated ring 14.1.3 Method using coordinate measuring machine. 15 Methods for measuring the thickness of the section 26 Accuracy classes 37 Tolerances on the pitch 48 Tolerances on the
9、 extreme radius of the screw propeller. 59 Tolerances on the thickness of the blade section . 510 Checking and tolerances of the form of blade sections 511 Tolerances on the length of the blade sections . 812 Tolerances on the location of blades, reference lines, and blade contours . 812.1 Marking o
10、f lines of reference 812.2 Tolerances on the contour of the leading edge . 912.3 Tolerances on the angular deviation between two consecutive blades 1013 Tolerances on rake, axial position, and relative axial position of consecutive blades1014 Surface finish .1115 Static balancing .1116 Measuring equ
11、ipment 12Bibliography .13 ISO 2015 All rights reserved iiiContents PageBS ISO 484-1:2015ISO 484-1:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is norma
12、lly carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in th
13、e work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the
14、different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this documen
15、t may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/p
16、atents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO princ
17、iples in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 8, Ships and marine technology, Subcommittee SC 3, Piping and machinery.This second edition cancels and replaces the first edition (ISO 484-
18、1:1981), which has been technically revised.ISO 484 consists of the following parts, under the general title Shipbuilding Ship screw propellers Manufacturing tolerances: Part 1: Propellers of diameter greater than 2,50 m Part 2: Propellers of diameter between 0,80 m and 2,50 m inclusiveiv ISO 2015 A
19、ll rights reservedBS ISO 484-1:2015ISO 484-1:2015(E)IntroductionThe propeller manufacturer is at liberty to use any equipment and method that enables the tolerances to be verified to the required accuracy. ISO 2015 All rights reserved vBS ISO 484-1:2015BS ISO 484-1:2015Shipbuilding Ship screw propel
20、lers Manufacturing tolerances Part 1: Propellers of diameter greater than 2,50 m1 ScopeThis part of ISO 484 defines manufacturing tolerances of ship screw propellers of a diameter greater than 2,50 m.NOTE Some deviations for the tolerance are permitted in certain cases subject to the discretion of t
21、he customer or of the designer and the customer.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition
22、of the referenced document (including any amendments) applies.ISO 1302, Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation3 Field of applicationThis part of ISO 484 applies to monobloc, built-up, and controllable pitch propellers.4 Methods for m
23、easuring pitch4.1 The principle of one method of measurement consists in setting out along a helicoidal line of radius, r, a certain length, PQ, corresponding to the desired angle, , and in measuring the difference, h, in the heights of the points P and Q with respect to a reference plane (see Figur
24、e 1).The length PQ shall be set out using one of the methods described in 4.1.1, 4.1.2, or 4.1.3.NOTE Other methods giving the required accuracy may be used if necessary.4.1.1 Use of marking gaugesThe length PQ shall be set out by means of marking gauges.4.1.2 Method with a graduated ringThe length
25、PQ shall be set out by means of angle, , on a part of a graduated ring of suitable radius (see Figure 1).4.1.3 Method using coordinate measuring machineThe height coordinates are taken at defined measuring points by means of coordinate measuring machine, and they are related to each other (determina
26、tion of height differences needed for pitch INTERNATIONAL STANDARD ISO 484-1:2015(E) ISO 2015 All rights reserved 1BS ISO 484-1:2015ISO 484-1:2015(E)evaluation). Both cartesian coordinate system (x, y, z) and polar coordinate system (, r, h) can be applied alternatively in order to define measuring
27、points P and Q.5 Methods for measuring the thickness of the section5.1 The thickness of a cylindrical section at a point S shall be measured along direction SV (see Figure 2) on the plane tangent to the coaxial cylinder and perpendicular to the pitch line of the pressure side of the section (and onl
28、y along direction SU perpendicular to the pressure side surface or direction S parallel to the propeller axis when defined in this way on the drawings).APBQhr21Key1 small graduated ring2 large graduated ringFigure 1 Pitch measurement2 ISO 2015 All rights reservedBS ISO 484-1:2015ISO 484-1:2015(E)SSS
29、SSS12345TVUTVSU1234567Key1 pressure side2 suction side3 cylindrical section4 line of maximum thickness of section perpendicular to the pressure side5 developed section perpendicular to the pressure side6 developed cylindrical section7 pressure sideFigure 2 Thickness measurement5.2 The maximum thickn
30、ess at each radius shall be determined by means of a pair of outside callipers or from the profile obtained by plotting the thickness at various points: S, S1, S2, S3, etc.6 Accuracy classesThe accuracy class shall be selected by the customer. The indications in Table 1 serve as guidance in this cho
31、ice.Table 1 Accuracy of manufacturingClass Manufacturing accuracyS Very high accuracyI High accuracyII Medium accuracyIII Wide tolerances ISO 2015 All rights reserved 3BS ISO 484-1:2015ISO 484-1:2015(E)7 Tolerances on the pitchTable 2 Pitch tolerancesDesignation of pitchClassS I II IIIa) Local pitch
32、 1,5 % 2 % 3 %with a minimum of 10 mm 15 mm 20 mmb) Mean pitch per radius of each blade1 % 1,5 % 2 % 5 %with a minimum of 7, 5 mm 10 mm 15 mm 25 mmc) Mean pitch per blade 0,75 % 1 % 1,5 % 4 %d) Mean pitch for propeller 0,5 % 0,75 % 1 % 3 %NOTE The tolerances of Table 2 are expressed as percentages o
33、f the design pitch corresponding to the radius for designations a) and b) and the mean design pitch for designations c) and d).7.1 Pitch shall be measured at least at the radii indicated in Table 3. By agreement between the interested parties, different radii may be measured.Table 3 Pitch measuremen
34、t locationsClass RadiiS and I A section near the hub 0,4 R 0,5 R 0,6 R 0,7 R 0,8 R 0,9 R 0,95 RII A section near the hub 0,5 R 0,6 R 0,7 R 0,8 R 0,9 RIII A section near the hub 0,5 R 0,7 R 0,9 R7.2 The measurement of local pitches for Class S and Class I is further controlled as described in Clause
35、10.7.3 The tolerances on the local pitch and on the mean pitch of each radius of each blade given in Table 2, a) and b) are increased by 50 % for sections at 0,4 R or less.7.4 Should the propeller manufacturer wish to compensate for an error on the pitch (inside or outside the tabulated tolerances)
36、by means of an alteration in the propeller diameter, he may do so only with the customers agreement.7.5 The design pitch is the pitch of the reference line as defined below.The design pitch line of a section is a helical reference for the section in question of which the section ordinates for the fa
37、ce and the back are given.It could be a line joining the nose and tail of the section or any other conveniently placed helical line.7.6 The local pitch at point B (Figure 1) is determined by measuring the difference in height between two points, P and Q, situated at equal distances from point B and
38、on either side of the latter (BP = BQ) and by multiplying the difference in height by 360. This shall be compared with the local pitch as calculated from the face offsets for the same points.The distance between any two points used for a local pitch measurement may range between 100 mm and 400 mm. O
39、ne pitch measurement is to be near the leading edge, one near the trailing edge, and there shall be at least two other pitch measurements in between. As far as possible, the pitch measurements should be consecutive.4 ISO 2015 All rights reservedBS ISO 484-1:2015ISO 484-1:2015(E)7.7 The pitch per rad
40、ius and per blade is determined for each radius by multiplying the difference in height between the most distant measuring points at each radius by 360.7.8 The average pitch per blade is defined as the arithmetic mean (average) of the measured pitches per radius for the blade in question.7.9 The ave
41、rage pitch for the screw propeller is defined as the arithmetic mean of the average pitches per blade.8 Tolerances on the extreme radius of the screw propeller8.1 The tolerances in Table 4 are expressed as percentages of screw propeller radius.Table 4 Radius toleranceSpecificationClassS I II IIITole
42、rance 0,2 % 0,3 % 0,4 % 0,5 %8.2 In the case of a ducted propeller, these tolerances may need to be reduced.9 Tolerances on the thickness of the blade sectionTable 5 Blade thickness toleranceSpecificationClassS I II IIIPlus tolerances +2 % +2,5 % +4 % +6 %but not less than 2 mm 2,5 mm 4 mm 6 mmMinus
43、 tolerances 1 % 1,5 % 2 % 4 %but not less than 1 mm 1,5 mm 2 mm 4 mm9.1 The thickness shall be measured at the same radii as those at which the pitch is measured.9.2 The tolerances in Table 5 are expressed as percentages of the local thickness.9.3 The maximum thicknesses indicated on the drawing sha
44、ll not be less, after deduction of the minus tolerance, than the thicknesses required by the Classification Society concerned.10 Checking and tolerances of the form of blade sections10.1 These apply only to propellers of Class S and Class I and to the same radii as those at which the pitch is measur
45、ed.In case of CNC-machining of blade and edges, it can be agreed between the manufacturer and the user to abstain from any further checking of the form of blade sections.10.2 To avoid undue deviation in overall camber, the algebraic sum of the percentage deviations resulting from any two consecutive
46、 measurements of local pitch shall not be in excess of 1,5 times the ISO 2015 All rights reserved 5BS ISO 484-1:2015ISO 484-1:2015(E)allowable tolerance (for example, if the tolerance is 2 %; the sum of consecutive deviations shall be within 3 %, see Figure 3).10.3 Alternatively, the satisfactory co
47、ntinuity of the cylindrical sections may be verified by the use of suitable flexible templates.10.4 The leading and trailing edges shall be checked by templates, or equivalent devices, to demonstrate their accuracy to the drawing. These templates shall be calculated along a straight path or formed t
48、o the pitch and radius of the tested section. The length of these templates shall be about 20 % of the blade section length but not necessarily more than 300 mm.10.4.1 Single part templates shall fit within the following tolerances of the face and the back: Class S: 0,5 mm; Class I: 0,75 mm.10.4.2 A
49、lternatively, by agreement between the manufacturer and the user, the edges shall be checked by templates made in three parts for each edge (see Figure 4) a short nose template controlling the final edge detail and two fairing templates from the nose, one to the face and one to the back, each covering about 20 % of the blade length but not necessarily more than 300 mm. These templates shall fit with the following tolerance: Class
