1、BRITISH STANDARD BS ISO 8579-1:2002 Acceptance code for gear units Part 1: Test code for airborne sound ICS 17.140.20; 21.200 BS ISO 8579-1:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority
2、of the Standards Policy and Strategy Committee on 30 August 2002 BSI 30 August 2002 ISBN 0 580 40320 3 National foreword This British Standard reproduces verbatim ISO 8579-1:2002 and implements it as the UK national standard. It supersedes BS 7676-1:1993 which is withdrawn. The UK participation in i
3、ts preparation was entrusted to Technical Committee MCE/5, Gears, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this
4、document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contr
5、act. Users are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals
6、for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 53 and a back cover. The B
7、SI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 8579-1:2002(E)INTERNATIONAL STANDARD ISO 8579-1 Second edition 2002-08-01 Acceptance code for gear units Part 1: Test code for air
8、borne sound Code de rception des engrenages sous carter Partie 1: Code dessai pour la dtermination du bruit arien BSISO85791:2002 BSISO85791:2002iiIS-9758 O1:(2002)E I SO 2002 All irthgs ersedevr iiiContents Page Foreword.iv Introduction.v 1 Scope 1 2 Normative references1 3 Terms and definitions .2
9、 4 Gear configuration and acoustic environment.2 5 Sound power level determination 3 6 Determination of emission sound pressure level 16 7 Installation and mounting conditions17 8 Operating conditions during sound measurements18 9 Information to be recorded.19 10 Information to be reported19 11 Decl
10、aration and verification of sound emission values 19 Annex A (informative) Examples of microphone positions on the measurement surface for different gear types and sizes20 Annex B (informative) Typical sound levels for different gear types and sizes (sound power and sound pressure) 29 Annex C (infor
11、mative) Information for the determination of airborne sound power levels using the methods of ISO 3744:1981 and ISO 3746:1979.44 Bibliography53 BSISO85791:2002iiiIS-9758 O1:(2002)E vi I SO 2002 All irthgs ersedevr Foreword ISO (the International Organization for Standardization) is a worldwide feder
12、ation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally 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 commit
13、tee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordanc
14、e with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires a
15、pproval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 8579 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8579-1 was prepared by Tech
16、nical Committee ISO/TC 60, Gears. This second edition cancels and replaces the first edition (ISO 8579-1:1993), which has been technically revised. ISO 8579 consists of the following parts, under the general title Acceptance code for gear units: Part 1: Test code for airborne sound Part 2: Determina
17、tion of mechanical vibrations of gear units during acceptance testing Annexes A, B and C of this part of ISO 8579 are for information only. BSISO85791:2002ivIS-9758 O1:(2002)E I SO 2002 All irthgs ersedevr vIntroduction The sound emitted by a gear unit or gearmotor can be radiated by the casing of t
18、he gear unit, the driving system (e.g. motor, coupling, another gear unit), and the connected structures included in the gear-drive system. On-site and on the shop test stand, the perceived sound can be significantly increased by reverberation effects or by the radiation of extraneous sources. Depen
19、ding on the type of gear unit or gearmotor, as well as on the requirement of the purchaser, it may be necessary for the manufacturer or supplier to know a) the sound emitted by the gear unit, excluding the sound from the driver/motor, driven system and transmission elements, b) the sound emitted by
20、the gearmotor, including the motor and the transmission elements, c) the sound emitted by subsystems or auxiliaries, for example, the lubrication system, and d) the sound emitted by each of those elements in respect of a given requirement, or in view of an efficient sound-proofing of the installatio
21、n. This part of ISO 8759 describes methods for the determination of the sound emitted by a gear unit alone, a gearmotor or a gear-drive system. Sound emission is expressed in terms of the sound power level of the transmission system and the emission sound pressure level at the relevant work station
22、(see 6.2). Annex A provides examples of practical microphone positions on the measurement plane for different gear types and sizes. Annex B gives typical sound-pressure and sound power levels for different gear types and sizes. Annex C, developed for ISO 8579-1:1993, provides information on the dete
23、rmination of airborne sound power levels emitted by gear units, using a combination of the two methods given in clause 5. BSISO85791:2002vINTENRATIONAL TSANDADR IS-9758 O1:(2002)EI SO 2002 All irthgs ersedevr 1Acceptance code for gear units Part 1: Test code for airborne sound 1 Scope This part of I
24、SO 8579 specifies the instructions and standardized conditions necessary for the determination of the airborne sound emission of gear units and gearmotors. It also specifies the allowed measurement methods, together with the operating and mounting conditions used for the test. The emission character
25、istics include emission sound pressure levels at specified positions and the sound power level. The determination of these quantities is necessary for a) manufacturers of gear units or gearmotors, in order that they may be able to declare the emitted sound, b) for comparing the sound emitted by gear
26、 units and gearmotors under service operation, and c) for the purpose of noise control at the design stage. This part of ISO 8579 has the aim of ensuring, with its use, the reproducibility of the determination of the airborne sound emission characteristics within specified limits determined by the g
27、rade of accuracy of the basic measurement method used. The sound measurement methods allowed by this part of ISO 8579 are engineering methods (grade 2) and survey methods (grade 3). 2 Normative references The following normative documents contain provisions which, through reference in this text, con
28、stitute provisions of this part of ISO 8579. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 8579 are encouraged to investigate the possibility of applying the most recent editions of th
29、e normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 3743-1:1994, Acoustics Determination of sound power levels of noise sources Engin
30、eering methods for small, movable sources in reverberant fields Part 1: Comparison method for hard-walled test rooms ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering method in an essentially free field over a reflecting plane ISO 3745: 1)
31、 , Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for anechoic and semi-anechoic rooms ISO 3746:1995, Acoustics Determination of sound power levels of noise sources using sound pressure Survey method using an enveloping measurement surface over
32、a reflecting plane 1) To be published. (Revision of ISO 3745:1977) BSISO85791:20021IS-9758 O1:(2002)E 2 I SO 2002 All irthgs ersedevr ISO 4871:1996, Acoustics Declaration and verification of noise emission values of machinery and equipment ISO/TR 7849:1987, Acoustics Estimation of airborne noise emi
33、tted by machinery using vibration measurement ISO 9614-1:1993, Acoustics Determination of sound power levels of noise sources using sound intensity Part 1: Measurement at discrete points ISO 9614-2:1996, Acoustics Determination of sound power levels of noise sources using sound intensity Part 2: Mea
34、surement by scanning ISO 11203:1995, Acoustics Noise emitted by machinery and equipment Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level 3 Terms and definitions For the purposes of this part of ISO 8579, the terms and defin
35、itions given in ISO 3743-1, ISO 3744, ISO 3745, ISO 3746, ISO 4871, ISO 9614-1, ISO 9614-2 and ISO 11203 apply. 4 Gear configuration and acoustic environment 4.1 Gear configuration This part of ISO 8579 is concerned with industrial gear units and gearmotors with gearing of the cylindrical, bevel and
36、 worm types. There are three gear configurations to be considered: a) gear unit, independent of driving or driven systems; b) gearmotor, with motor integral to the gear unit; c) gear-drive system, where the motor or driving equipment is installed on a common baseplate with other required auxiliary e
37、quipment. The purchaser and manufacturer shall agree on whether sound is to be measured on the system or on the gear unit alone. Safety guards, such as cardan and coupling guards, and insulation hoods, where applicable, shall be present during the sound emission determination. 4.2 Acoustic environme
38、nts This part of ISO 8579 allows for three possible acoustic environments for each configuration. In each case, the gear configuration may be installed on-site (see 7.2.4), on the shop test stand (see 7.2.3), or in a specific facility intended for acoustic measurements (see 7.2.2). BSISO85791:20022I
39、S-9758 O1:(2002)E I SO 2002 All irthgs ersedevr 35 Sound power level determination 5.1 General Unless otherwise specified, the determination shall be an A-weighted sound power, with the testing being conducted in the manufacturers test facility using the method chosen by the manufacturer. 5.2 Method
40、s In determining the method to be used, the grade of accuracy of the measurement must be considered. Each ISO standard method gives specific uncertainty limits for the grades, with grade 2 being more precise than grade 3. A typical example, taken from ISO 9614-2:1996, is given in Table 1. Table 1 Un
41、certainty in the determination of sound power levels Standard deviations s Octave band centre frequencies Hz One-third octave band centre frequencies Hz Engineering (grade 2) dB Survey (grade 3) dB 63 to 12550 to 160 3 250 200 to 315 2 500 to 4 000 400 to 5 000 1,5 6 300 2,5 A-weighted a 1,5 b4 NOTE
42、 The stated uncertainty of the A-weighted estimate does not apply if the total A-weighted power in the one-third-octave bands outside the range 400 Hz to 5 000 Hz exceeds the total within this range; individual uncertainties then apply. a 63 Hz to 4 kHz or 50 Hz to 6,3 kHz. b The true value of the A
43、-weighted sound power level is expected with a certainty of 95 % to be in the range of 3dB about the measured value. The preferred methods for determining the sound power level are the following grade 2 accuracy methods: ISO 3743-1; ISO 3744; ISO 9614-1 or ISO 9614-2. If it has been shown that grade
44、 2 cannot be attained, then one of the following grade 3 methods may be used: ISO 3746; ISO 9614-1 or ISO 9614-2. If none of the above methods are practicable, the method of ISO/TR 7849 may be used. For selection of a basic standard for the determination of the sound power level of an industrial gea
45、r unit or gearmotor, use Table 2 or Table 3. The differences between Tables 2 and 3 reflect the relative ease of performing measurements for gear units as opposed to gearmotors. Table 2 addresses gear units and gear-drive systems, which are an assembly of components and thus present a more challengi
46、ng measurement procedure. Table 3 represents the relatively more BSISO85791:20023IS-9758 O1:(2002)E 4 I SO 2002 All irthgs ersedevr easily achieved measurements for a “close-coupled” gearmotor configuration where the sound of the gear unit is not separated from the sound of the motor. The term “gear
47、motor” may also include other close-coupled arrangements where the sound cannot be separated. This would include close-coupled gears and generators and close-coupled hydraulic motors. NOTE Comments on recommended International Standards ISO 3743-1 is based upon a hard-walled room and low background
48、noise. This International Standard gives specifications for sound pressure measurement in octave bands in order to enable the sound power level to be calculated. ISO 3744 is based upon a non-reverberant environment and low background noise. This International Standard specifies a method for calculat
49、ing the sound power level from the measured A-weighted sound pressure level or the sound pressure level in octave or one-third octave bands. ISO 3745 is based upon a special anechoic or semi-anechoic test room. This International Standard gives specifications for A- weighted sound pressure level measurement in order to enable the sound power level to be calculated. ISO 3746 is less demandin
