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1、BRITISH STANDARD BS ISO 7181:1991 Hydraulic fluid power Cylinders Bore and rod area ratios ICS 23.100.20 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 This British Standard, having been prepared under the direction of the
2、Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 May 1997 BSI 09-1999 ISBN 0 580 27544 2 National foreword This British Standard reproduces verbatim ISO 7181:1991 and implements it as the UK national standard. The UK participation in its
3、preparation was entrusted to Technical Committee MCE/18, Fluid power systems and components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the U
4、K interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publication
5、s referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of
6、 a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, page
7、s ii to iv, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed C
8、opy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 BSI 09-1999i Contents Page National forewordInside front cover Forewordiii Text of ISO 71811 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled
9、Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 ii BSI 09-1999 Contents Page Forewordiii Intro
10、duction1 1Scope1 2Normative reference1 3Definitions1 4Area ratios1 5Identification statement1 Annex A (informative) BibliographyInside back cover Figure 11 Table 1 Bore and rod area ratios2 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
11、ISO 7181:1991 BSI 09-1999iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interest
12、ed 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 the work. ISO collaborates closely with the International Electrotechnical Co
13、mmission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Intern
14、ational Standard ISO 7181 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Sub-Committee SC 3, Cylinders. This second edition cancels and replaces the first edition (ISO 7181:1982), which has been technically revised. Annex A of this International Standard is for information only
15、. Descriptors: Hydraulic fluid power, hydraulic transmission, hydraulic cylinders, bores, piston-rods, dimensions. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+0
16、0:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 BSI 09-19991 Introduction In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an enclosed circuit. One component of such systems is the hydraulic cylinder. This is a device which converts
17、power into linear mechanical force and motion. It consists of a movable element, i.e. a piston and piston rod, operating within a cylindrical bore. 1 Scope This International Standard specifies for each pair of diameters (AL = cylinder bore; MM = piston rod diameter) of hydraulic cylinders a corresp
18、onding standard ratio between the useful areas A1 and A2. 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subje
19、ct to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 5598:1985, Fluid
20、 power systems and components Vocabulary. 3 Definitions For the purposes of this International Standard, the definitions given in ISO 5598 apply. 4 Area ratios Dimensions are shown on Figure 1 and given in Table 1. NOTE 1For each pair of diameters (AL, MM) there is a corresponding ratio between the
21、useful areas A1 and A2. NOTE 2Table 1 gives, for guidance, for each value of AL those standard values of MM that give ratios approximately equal to one of the following preferred numbers: 1,06 1,12 1,25 1,4 1,6 2 2,5 5 NOTE 3Moreover, for each pair (AL, MM), Table 1 gives calculated values of A1 and
22、 A2 and the corresponding effective value of . 5 Identification statement (Reference to this International Standard) Use the following statement in test reports, catalogues and sales literature when electing to comply with this International Standard: “Hydraulic cylinder area ratios conform to ISO 7
23、181, Hydraulic fluid power Cylinders Bore and rod area ratios.” Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 2 BSI 09-1999 Table 1 Bore and rod area ratios Diameters in millimetres Areas in square centimetres aAL
24、253240506380(90)100(110)125(140)160(180)200(220)250(280)320(360)400(450)500 .A14,91 8,04 12,6 19,631,2 50,3 63,678,5 951231542012543143804916168041 018 1 257 1 590 1 963 1,06 MM A2 12 18,5 1,06 16 29,2 1,07 20 47,1 1,07 22 59,8 1,06 25 73,6 1,07 28 88,9 1,07 32 115 1,07 36 144 1,07 40 188 1,07 45 23
25、9 1,07 50 295 1,07 56 355 1,07 63 460 1,07 70 577 1,07 80 754 1,07 90 954 1,07 100 1 178 1,07 110 1 495 1,06 125 1 841 1,07 1,12 MM A2 12 11,4 1,10 16 17,6 1,11 20 28,0 1,11 25 45,4 1,11 28 57,5 1,11 32 70,5 1,11 36 84,9 1,12 40 110 1,11 45 138 1,12 50 181 1,11 56 230 1,11 63 283 1,11 70 342 1,11 80
26、 441 1,11 90 552 1,12 100 726 1,11 110 923 1,10 125 1 134 1,11 140 1 436 1,11 160 1 762 1,11 1,25 MM A2 12 3,78 1,30 14 6,50 1,24 18 10,0 1,25 22 15,8 1,24 28 25,0 1,25 36 40,1 1,25 40 51,1 1,25 45 62,6 1,25 50 75,4 1,26 56 98,1 1,25 63 123 1,25 70 163 1,24 80 204 1,25 90 251 1,25 100 302 1,26 110 3
27、96 1,24 125 493 1,25 140 650 1,24 160 817 1,25 180 1 002 1,25 200 1 276 1,25 220 1 583 1,24 1,4 MM A2 14 3,37 1,46 18 5,50 1,46 22 8,77 1,43 28 13,5 1,46 36 21 1,48 45 34,4 1,46 50 44 1,45 56 53,9 1,46 63 63,9 1,49 70 84,2 1,46 80 104 1,48 90 137 1,46 100 176 1,45 110 219 1,43 125 257 1,48 140 337 1
28、,46 160 415 1,48 180 550 1,46 200 704 1,45 220 877 1,43 250 1 100 1,45 280 1 348 1,46 1,6 MM A2 16 2,90 1,69 20 4,90 1,64 25 7,66 1,64 32 11,6 1,69 40 18,6 1,68 50 30,6 1,64 56 39 1,63 63 47,4 1,66 70 56,5 1,68 80 72,5 1,69 90 90,3 1,70 100 123 1,64 110 159 1,60 125 191 1,64 140 226 1,68 160 290 1,6
29、9 180 361 1,70 200 490 1,64 220 638 1,60 250 766 1,64 280 975 1,63 320 1 159 1,69 2 MM A2 18 2,36 2,08 22 4,24 1,90 28 6,41 1,96 36 9,46 2,08 45 15,3 2,04 56 25,6 1,96 63 32,4 1,96 70 40,1 1,96 80 44,8 2,12 90 59,1 2,08 100 75,4 2,04 110 106 1,90 125 132 1,93 140 160 1,96 160 179 2,12 180 236 2,08 2
30、00 302 2,04 220 424 1,90 250 527 1,93 280 641 1,96 320 786 2,02 360 946 2,08 2,5 MM A2 20 1,77 2,78 25 3,13 2,57 32 4,52 2,78 40 7,07 2,78 50 11,5 2,70 63 19,1 2,63 70 25,1 2,53 80 28,3 2,78 90 31,4 3,03 100 44,2 2,78 110 58,9 2,61 125 78,3 2,57 140 101 2,53 160 113 2,78 180 126 3,03 200 177 2,78 22
31、0 236 2,61 250 313 2,57 280 402 2,53 320 452 2,78 360 573 2,78 400 707 2,78 5 MM A2 45 3,73 5,26 56 6,54 4,76 70 11,8 4,27 80 13,35 4,76 90 14,9 5,26 100 16,5 5,76 110 27,7 4,43 125 31,2 4,93 140 47,1 4,27 160 53,4 4,76 180 60 5,26 200 66 5,76 220 111 4,43 250 125 4,93 280 188 4,27 320 214 4,76 360
32、239 5,26 400 334 4,76 450 373 5,26 NOTEValues in parentheses are non-preferred values and should be used only for special applications. a Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 BSI 09-1999 Annex A (informative) Bibl
33、iography 1 ISO 3320:1987, Fluid power systems and components Cylinder bores and piston rod diameters Metric series. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:46:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 7181:1991 BSI 389 Chiswick High Road London W4 4AL BSI British Standar
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