Tiêu chuẩn iso 00484 1 2015

© ISO 2015 Shipbuilding — Ship screw propellers — Manufacturing tolerances — Part 1 Propellers of diameter greater than 2,50 m Construction navale — Hélices de navires — Tolérances de fabrication — Pa[.]

Shipbuilding — Ship scr ew propel ers

Part 1:

Co struction n v le — Hélice s de n vire s — Toléra c s de

f brication —

Partie 1: Hélice de diamètr sup rieur à 2,50 m

S con edition

2 1 -1 -0

Refer ence n mb r

ISO 484-1:2 1 (E)

i © ISO 201 – A ll rights reserved

© ISO 201 , P blshed in Sw itz rlan

A ll rig hts r eserved Unles otherw ise spe ified, nopar of this p blc tion ma y be r eprod c d or utilz d otherwise in an form

or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or posin on the internet or an intr anet , without prior

written permis ion Permis ion c n be r eq esed fr om either ISO at the ad r es below or ISO’s member bod y in the c u ty of

the r eq eser

ISO c pyrig ht ofic

C de Blan on et 8 • C 4 1

CH-1 14 Vernier, Geneva, Sw itzerlan

Tel + 12 7 9 011

Fax 412 7 9 0 4

c pyrig ht@iso.or g

www.iso.or g

F r eword i v

Introduction v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Field of applcatio 1

4 Metho s for me sur ing pitch 1

4.1.1 Use of mar king gaug es 1

4.1.2 Method with a g r ad ated ring 1

4.1.3 Method using co r dinate measuring machine 1

5 Metho s for me sur ing the thicknes of the section 2

6 Ac curacy clas es 3

7 Toleranc es on the pitch 4

8 Toleranc es on the e x treme radius of the s rew pr opeler .5

9 Toleranc es on the thicknes of the blade sectio 5

10 Checking and toleranc es of the for m of blade sections 5

11 Toleranc es on the leng th of the blade sections 8

12 Toleranc es on the locatio of blades, referenc e lnes, and blade c onto r .8

1 1 Mar king of lnes of r efer enc 8

1 2 Toleranc s on the contour of the leading edg e 9

1 3 Toleranc s on the ang ular deviation betwe n two conse utive blades 1

13 Toleranc es on rake, ax ial position, and r elati ve ax ial position of c onsecuti ve blades .10

14 Surfac e finish 11

15 Static balancing 11

16 Me sur ing equipment 12

Biblog raphy 13

ISO (he Int ernational Org nization for Stan ardization) is a worldwide fede ation of national s an ards

b dies (ISO membe b dies) The work of pr paring Int ernational Stan ards is normal y car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take p rt in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sp nsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the meaning of ISO spe if ic t erms and ex r s ions r lat ed t o conformity

as es ment, as wel as information a out ISO’ s adhe enc t o the WTO principles in the Te h ical

Bar ie s t o Trade (TBT) se the folowing URL: F or word - Sup lementary information

The committ ee r sp nsible for this document is ISO/TC 8, S ips a d marine techn lo y, Subcommitt ee

SC 3, Pipin a d machiner y

This se on edition canc ls an r plac s the firs edition (ISO 484-1:1 8 ), which has be n

te hnical y r vised

ISO 484 consis s of the folowing p rt , un e the g ene al title S ip uidin — S ip sc rew pro ele s —

Ma u ac turin tole a c es:

— Part 1: Pro ele s o diamete gr ate th n 2,50 m

— Part 2 : Pro ele s o diamete bet we n 0 ,8 0 m a d 2,50 m inclus i ve

The pro ele man factur r is at lbe ty t o use any eq ipment an method that ena les the t ole anc s

t o be ve if ied t o the r q ir d ac uracy

Shipbuilding — Ship screw propel ers — Manufacturing

Part 1:

This part of ISO 484 defines man facturing tole anc s of ship sc ew pro el e s of a diamete

gr ate than 2,5 m

NOTE S me deviations for the t olerance are permit ed in certain cases subject to the dis retion of the

customer or of the designer an the cust omer

2 Normati ve referenc es

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a ples F or un at ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a ples

ISO 1 0 , G eometric al Produc t S ec ific atio s (GPS) — Indic atio o s urf c e tex tur in te h ic al produc t

doc umentatio

3 Field of appl cation

This part of ISO 484 a ples t o mono loc, buit-up, and control a le pit ch pro ele s

4 Methods for measuring pitch

4.1 The principle of one method of measurement consists in setting out along a helcoidal lne of

radius, r, a c rtain leng th, PQ, corr esp n ing to the desir ed angle, α, an in measuring the diferenc , h, in

the height of the p int P an Q with r espe t o a refer enc plane ( e Fig ure 1)

The length PQ shal be set out using one of the methods desc ibed in 4.1.1, 4.1.2, or 4.1.3

NOTE Other methods giving the req ired ac uracy may b used if neces ary

4.1.1 Use of mar king gaug es

The length PQ shal be set out b means of marking ga ug es

4.1.2 Method with a g raduated ring

The length PQ shal be set out b means of angle, α , on a p rt of a grad ated ring of suita le radius

( e Figur 1)

4.1.3 Method using c oor dinate me sur ing machine

The height co rdinat es ar taken at def ined measuring point b means of co rdinat e measuring

machine, an they ar r lat ed t o each othe (det ermination of height dife enc s ne ded for pit ch

ev luation) Both cart esian co rdinat e sy st em (x, y, z) an p lar co rdinat e sy st em (α, r, h ) can be

a pled alt ernatively in orde t o def ine measuring point P an Q

5 Methods for measur ing the thicknes ofthe section

5.1 The thick es of a cylndrical se tion at a p int S shal be measur ed along direction SV ( e

Fig ur e 2) on the plane tang ent to the co x ial cyln e an pe pen icular to the pitch lne of the pr es ure

side of the se tion (an only along dir ection SU pe pen icular to the pr es ure side surfac or dir ection S

p r alel to the pr opele ax is when defined in this wa y on the drawing s)

A

P

B

Q

r

α

2

1

Key

1 smal g rad ated ring

2 larg e g rad ated ring

Figure 1 — Pitch me surement

S S S S S S

1

2

3

4

5

T

V

U

T V

S U

1

2

3

4

5

6

7

Key

1 pr es ure side

2 suction side

3 cylin rical section

4 line of max imum thick es of section perpen icular to the pr es ure side

5 developed section perpen icular to the pr es ur e side

6 developed cylin rical section

7 pr es ure side

Figure 2 — Thicknes me surement

5.2 The max imum thick es at each radius shal be dete mined b means of a p ir of out ide cal pe s

or from the profie o tained b plotting the thick es at v rious p ints: S, S

1 , S

2 , S

3 , etc

6 Ac curacy clas es

The ac uracy clas shal be sele ted b the cus ome The indications in Ta le 1 se v e as guidanc

in this choic

Table 1 — A ccuracy of manufacturing

7 Toleranc es on the pitch

Table 2 — Pitch tolerances

Designation ofpit ch

Clas

—

b) Me n pitch per radius of

e ch blade

N TE The toleranc s of Table 2 are e pres ed as perc ntages of the desig pitch

c r espon in to the radius for desig ations a) an b ) an the me n desig pitch for

desig ations c) an d)

7.1 Pitch shal be measur ed at leas at the radi in icated in Ta le 3 By ag r eement betwe n the

inter es ed p rties, difer ent r adi ma y be measur ed

Table 3— Pitch me surement locatio s

S an I A section ne r the h b – 0,4 R – 0,5 R – 0,6 R – 0,7 R – 0,8 R – 0, 9 R – 0,9 R

I A section ne r the h b – 0,5 R – 0,6 R – 0,7 R – 0,8 R – 0,9R

II A section ne r the h b – 0,5 R – 0,7 R – 0,9 R

7.2 T e measurement ofloc al pitches for Clas S an Clas I is fur the c ontroled as descr ibed in Clause 1

7.3 The toleranc s on the local pitch an on the mean pitch of each radius of each blade g iven in

Ta le 2, a) an b) ar e incr eased b 5 % for se tions at 0,4 R or les

7.4 Should the pr opele man factur er wish to compensate for an e r or on the pitch (inside or out ide

the tabulated toleranc s) b means of an alteration in thepr opele diamete , he ma y do so only w ith the

cus ome ’s ag r eement

7.5 The desig n pitch is the pitch of the r efer enc lne as defined below

The design pit ch lne of a se tion is a helcal r fe enc for the se tion in q es ion of w hich the se tion

ordinat esfor the fac an the back ar given

It could be a lne joining the nose an tai of the se tion or any othe conveniently plac d helcal lne

7.6 The local pitch at p int B (Fig ur e 1) is dete mined b measuring the difer enc in height betwe n

two p ints, P and Q, situated at eq al dis anc s fr om p int B and on eithe side of the late (BP = BQ )

and b multiplying the difer enc in height b

α T is shal be comp red with the local pitch as

calculated fr om the fac ofsets for the samep int

The dis anc betwe n any two p int used for a local pit ch measur ment ma rang e betwe n 1 0 mm

an 400 mm One pit ch measur ment is t o be near the leading edg e, one near the trai ng edg e, an the e

shal be at leas two othe pit ch measur ment in betwe n As far as p s ible, the pit ch measur ment

should be conse utive

7.7 The pitch pe radius an pe blade is dete mined for each radius b multiplying the difer enc in

height betwe n the mos dis ant measuring p int at each radius b

α

7.8 The a verag e pitch pe blade is defined as the arithmetic mean (a verag e) of the measur ed pitches

pe radiusfor the blade in q es ion

7.9 The a er age pitch for t he scr ew pr opele is defined as the arit hmet ic mean of t he a er age

pitches pe blade

8 Toleranc es on the ex treme radius of the screw propel er

8.1 The toleranc s in Ta le 4 ar e ex pres ed as percentag es of scr ew pr opele r adius

Table 4 — Radius tolerance

Spe ification

Clas

8.2 In the case of a ducted pr opele , these toleranc s ma y ne d to be red c d

9 Toleranc es on the thicknes of the blade section

Table 5 — Blade thicknes tolerance

Spe ification

Clas

9.1 The thicknes shal bemeasured at the same radi asthose at which the pitch is measured

9.2 The toleranc s in Ta le 5 ar e ex pres ed as percentag es of the local thick es

9.3 The ma imum thicknes es in icated on the drawing shal not be les , afe deduction of the min s

toleranc , than the thick es es r eq ir ed b the Clas ification Society conc rned

10 Checking and toleranc es of the form of blade sections

10.1 These a ply only to pr opele s ofClas S an Clas I an to the same radi as those at which the

pitch is measur ed

In case of CNC-machining of blade an edg es, it can be a r ed betwe n the man factur r an the use

t o a s ain from any furthe che king of the form of blade se tions

10.2 To a void u d e deviation in o eral cambe , the alg ebr aic sum of the percentag e deviations

r esulting from any two conse utive measur ements of local pitch shal not be in exc s of 1,5 times the

alowa le toleranc (or example, if the toleranc is ± %; the sum of conse utive deviations shal be

within ± %, se Fig ure 3)

10.3 Alte natively, the satis actory contin ity of the cyln rical se tions ma y be ve ified b the use of

suita le flex ible templates

10.4 The leading an trai ng edg es shal be che ked b templates, or eq iv lent devic s, to demonstrate

their ac uracy to the drawing These templates shal be calculated along a s raight p th or formed to the

pitch an radius of the tes ed se tion The leng th of these templates shal be a out 20 % of the blade

se tion leng th but not ne es ariy mor e than 3 0 mm

10.4.1 Single p rt templates shal fit within the folow ing toleranc s of the fac and the b ck:

— Clas S: ± ,5 mm;

— Clas I: ± ,7 mm

10.4.2 A lte natively, b ag r eement betwe n the man factur er and the use , the edg es shal be che ked

b templates made in thr ee p rt for each edg e ( e Fig ur e 4)a short nose template contr ol ng the final

edg e detai an two fairing templates fr om the nose, one to the fac an one to the b ck, each co e ing

a out 20 % of the blade leng th but not ne es ariy more than 3 0 mm These templates shal fit with the

folow ing toleranc :

— Clas S: 0,2 mm;

— Clas I: 0,3 mm

In case of larg e skew of the blades ( kew angle mor than 2 ° , LE t emplat es (ha ing a cor esp n ing

sha e) ma be at ached pe pen icular t o the leading edg e cont our alt ernatively b a r ement betwe n

the man factur r an the use This holds for the ar a from 0,7 R t o the tip The t emplat es shal be

at ached at the c os point ofblade outl ne an nominal t es radi, an they shal o e la at leas 2 t es

radi, at w hich pit ch, thick es , et c wi be che ked, but not ne es ari y mor than 3 0mm length

The n mbe of t emplat es t o be a pled is the same as for the conventional proc d r

Deviation in local pitch

0

Difer ence

0

0

-0,5%

-3,5%

+ ,5 %

-2 %

-2%

Heig hts me sured

Intervals of pitch me surements

I

I

I

IV

V

1

2

3

4

a

b

Key

a

T e r etical outline of blade section

b

Pitch difer ence to high

NOTE On Figure 3, the deviations are multiplied by 2 T e values which are to high are u derlined

Figure 3 Me surement and verificatio of blade tolerances

3 4

Rad 0,8

a

b

Key

1 short nose template made to size + ma tolerance

2 form templates for pr es ur e an suction sides separated by 6 mm for in epen ent ap lication

3 the r etical suction side pr ofile

4 contact surface for suction side

a

Le ding edg e (+6 mm)

b

Pr es ure side

Figure 4 — Me surement using template

11 Toleranc es on the leng th ofthe blade sections

Table 6 — Blade length tolerances

Spe ification

Clas

11.1 The toler anc s in Ta le 6 ar e ex pr es ed as per centag es of the v lues of the ratio: diamete b the

n mbe of blades (D/Z)

11.2 The leng ths of the se tions of each blade shal be measur ed at five radi at leas (Example: 0,3 R –

0,5 R – 0,7 R – 0,8 R – 0,95 R)

12 Toleranc es on the location of blades, r eferenc e l nes, and blade c ontour s

12.1 Mar king ofl nes of referenc e

The r fe enc lne is p sitioned as a s raight l ne on the drawing b location of the p int M on the

pr s ur side of the blade an p int O on the a is of thepro ele

This p int M shal be marked on a cy lindrical se tion at a radius out ide 0,5 R an , if p s ible, near 0,7 R

In principle, it is sele ted in such a w ay that the l ne OM cut the larg es pos ible n mbe of blade se tions