BS-7676-1-1993 ISO-8579-1-1993.pdf
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1、BRITISH STANDARD BS 7676-1: 1993 ISO 8579-1: 1993 Acceptance code for gears Part 1: Determination of airborne sound power levels emitted by gear units UDC 621.833:534.6 BS 7676-1:1993 This British Standard, having been prepared under the direction of the General Mechanical Engineering Standards Poli
2、cy Committee, was published under the authority of the Standards Board and comes into effect on 15 August 1993 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference MCE/5 Draft for comment 89/72665 DC ISBN 0 580 21896 1 Committees responsible for this Brit
3、ish Standard The preparation of this British Standard was entrusted by the Machinery and Components Standards Policy Committee (MCE/-) to Technical Committee MCE/5, upon which the following bodies were represented: British Gear Association British Horological Federation British Railways Board Engine
4、ering Equipment and Materials Users Association Federation of British Engineers Tool Manufacturers Federation of Manufacturers of Construction Equipment and Cranes Gauge and Tool Makers Association Institution of Mechanical Engineers Lloyds Register of Shipping London Underground Ltd. Ministry of De
5、fence Power Generation Contractors Association (BEAMA Ltd.) The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Advanced Manufacturing Technology Research Institute Agricultural Engineers Association Association of Building Engineers Associat
6、ion of Consulting Engineers British Broadcasting Corporation British Cement Association British Compressed Air Society British Industrial Truck Association British Occupational Hygiene Society British Steel plc British Telecommunications plc Construction Industry Research and Information Association
7、 Department of Health Department of the Environment (Building Research Establishment) Department of Trade and Industry (National Engineering Laboratory) Department of Trade and Industry (National Physical Laboratory) EEA (the Association of Electronics, Telecommunications and Business Equipment Indu
8、stries) Engineering Industries Association Fan Manufacturers Association Federation of Associations of Specialists and Sub-contractors Federation of Manufacturers of Construction Equipment and Cranes Federation of Piling Specialists Health and Safety Executive Hevac Association Institute of Acoustic
9、s Institute of Occupational Hygienists Institute of Physics Institute of Sound and Vibration Research Institution of Electrical Engineers Institution of Mechanical Engineers Rotating Electrical Machines Association (BEAMA Ltd.) Royal Institute of British Architects Society of Environmental Engineers
10、 University of Liverpool University of Manchester Amendments issued since publication Amd. No.DateComments BS 7676-1:1993 BSI 10-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative references1 3Definitions1 4Instrumentation2 5Test conditi
11、ons2 6Procedure for obtaining sound pressure level data4 7Determination of A-weighted sound power level5 8Evaluation of octave and one-third-octave sound power7 9Test report7 Annex A (normative) Procedures for calculating A-weighted sound pressure or power levels from octave or one-third-octave band
12、 spectra12 Annex B (normative) Practicable measurement applications12 Annex C (normative) Determination of the environmental correction K2 for acoustic reaction in a test room with the aid of a reference sound source13 Annex D (informative) Bibliography13 Figure 1 Example of machinery mounted on the
13、 floor or by a wall9 Figure 2 Measurement-point arrangement for Figure 19 Figure 3 Example of machinery mounted on the floor or near to a wall10 Figure 4 Measurement-point arrangement for Figure 310 Figure 5 Example of machinery mounted in a pit with hard sound-reflecting walls10 Figure 6 Measuremen
14、t-point arrangement for Figure 510 Figure 7 Example of machinery mounted at a considerable distance from a sound-reflecting surface11 Figure 8 Surface-measurement-point arrangement for Figure 711 Table 1 Measurement-surface quantity, LS5 Table 2 Correction values, K1, for background noise5 Table 3 E
15、nvironmental correction factor, K26 Table 4 Standard deviations of the measurement uncertainty7 Table A.1 Octave band data12 Table A.2 One-third-octave band data12 List of referencesInside back cover BS 7676-1:1993 ii BSI 10-1999 National foreword This Part of BS 7676 has been prepared under the dir
16、ection of the Machinery and Components Standards Policy Committee. It is identical with ISO 8579-1:1993 Acceptance code for gears Part 1: Determination of airborne sound power levels emitted by gear units, which was prepared jointly by Technical Committee ISO/TC 60, Gear, and ISO/TC 43, Acoustics, o
17、f the International Organization for Standardization (ISO), in which the United Kingdom played an active part. BS 7676 comprises the following Parts: Part 1: Determination of airborne sound power levels emitted by gear units; Part 2: Determination of mechanical vibrations of gear units during accept
18、ance testing. A British Standard does not purport to include all the necessary provisions of 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. Cross-references Internatio
19、nal StandardCorresponding British Standard ISO 3744:1981BS 4196 Sound power levels of noise sources Part 4:1981 Engineering methods for determination of sound power levels for sources in free-field conditions over a reflecting plane (Identical) IEC 225:1966BS 2475:1964 Specification for octave and o
20、ne-third octave band-pass filters (Technically equivalent) IEC 651:1979BS 5969:1981 Specification for sound level meters (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 14, an inside back cover and a back cover. This standard has
21、been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. BS 7676-1:1993 BSI 10-19991 Introduction The gear unit is only part of the total acoustic system which includes, in addition to the gear unit, the prim
22、e mover, driven equipment, gear unit mounting, foundation and acoustic environment. Each of these might affect the measured level of sound emitted from the gear unit. Therefore, unless otherwise agreed, the gear manufacturer is to ensure that the level of noise emitted from a gear unit under the tes
23、t conditions in his factory is within contractually specified or negotiated limits. The measurement method specified in this part of ISO 8579 determines the A-weighted sound power level of sound radiated over a reflective surface (for example, in an anechoic room with a reflective floor). Correction
24、 values are provided so that the procedure can be applied, within specified limits, in factory test areas, commonly used by a manufacturer. In some instances it may be necessary to determine sound power levels in octave or one-third-octave bands; procedures are included for that purpose. However, th
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