BS-7854-6-1996 ISO-10816-6-1995.pdf
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1、BRITISH STANDARD BS 7854-6: 1996 ISO 10816-6: 1995 Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 6: Reciprocating machines with power ratings above 100 kW ICS 17.160 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 0
2、8 10:57:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7854-6:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1996 BSI 06-1999 The following BSI reference
3、s relate to the work on this standard: Committee reference GME/21 Draft for comment 93/715730 DC ISBN 0 580 25616 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GME/21, Mechanical vibration and shock, upon which the fo
4、llowing bodies were represented: Federation of Civil Engineering Contractors Imperial College of Science and Technology Institute of Sound and Vibration Research Institution of Mechanical Engineers Lloyds Register of Shipping Ministry of Defence Open University Power Generation Contractors Associati
5、on PGCA (BEAMA Ltd.) Railway Industry Association Society of British Aerospace Companies Limited Society of Environmental Engineers The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Cranfield University Electricity Association Rotating Elec
6、trical Machines Association (BEAMA Ltd.) Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:57:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7854-6:1996 BSI 06-1999i Contents Page Committees responsible
7、Inside front cover National forewordii Introduction1 1Scope1 2Normative references2 3Definitions2 4Measurements2 5Vibration criteria4 Annex A (normative) Machine vibration classification5 Annex B (informative) Forms for vibration measurements on reciprocating machines6 Annex C (informative) Vibratio
8、n severity grade nomograph8 Annex D (informative) Bibliography9 Figure 1 Example of a vertical in-line machine3 Figure 2 Example of a multicylinder Vee machine3 Figure 3 Example of a horizontal opposed machine3 Figure C.1 Vibration severity grade nomograph8 Table 1 Vibration severity grades4 Table 2
9、 Example of vibration values4 Table A.1 Vibration classification numbers and guide values for reciprocating machines5 List of referencesInside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:57:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7854-
10、6:1996 ii BSI 06-1999 National foreword This Part of BS 7854 has been prepared by Technical Committee GME/21 and is identical with ISO 10816 Mechanical vibration Evaluation of machine vibration by measurements on non-rotating parts Part 6:1995 Reciprocating machines with power ratings above 100 kW,
11、published by the International Organization for Standardization (ISO). ISO 10816-6 was prepared by the Technical Committee ISO/TC 108, Mechanical vibration and shock, in which the UK played an active part. A British Standard does not purport to include all the necessary provisions of a contract. Use
12、rs of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-reference International standardCorresponding British Standard ISO 2041:1990BS 3015:1991 Glossary of terms relating to mechanical
13、 vibration and shock (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 10, 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 i
14、n the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 10:57:47 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7854-6:1996 BSI 06-19991 Introduction ISO 10816-1 gives general guidelines for the evaluation of machine vibra
15、tion by measurements on non-rotating parts. This part of ISO 10816 is a new document which establishes procedures and guidelines for the measurement and classification of mechanical vibration of reciprocating machines. In general, this part of ISO 10816 refers to vibration of the main structure of t
16、he machine, and the guide values given for these vibrations are defined primarily to classify the vibration of the machine and to avoid problems with auxiliary equipment mounted on this structure. Recommendations for measurements and evaluation criteria are provided in this part of ISO 10816. Typica
17、l features of reciprocating machines are the oscillating masses, the cyclically varying output (input) torques and the pulsating forces in the associated pipework. All these features cause considerable alternating forces on the main supports and vibration amplitudes of the main frame. The vibration
18、amplitudes are generally higher than for rotating machinery but, since they are largely determined by the design features of the machine, they tend to remain more constant over the life of the machinery than for rotating machinery. In the case of reciprocating machines, the vibration measured on the
19、 main structure of the machine and quantified according to this part of ISO 10816 may only give a rough idea of the stresses and vibratory states of the components within the machine itself. For example, torsional vibration of rotating parts cannot generally be determined by measurements on the stru
20、ctural parts of the machine. The damage, which can occur when exceeding the guide values based on experience with similar machines, is sustained predominantly by machine-mounted components (e.g. turbochargers, heat-exchangers, governors, filters, pumps), connecting elements of the machine with its p
21、eripheral parts (e.g. pipelines) or monitoring instruments (e.g. pressure gauges, thermometers). The question as from which vibration values damage is to be expected largely depends on the design of these components and their fastenings. In some cases, special measurements on certain machine compone
22、nts will be required to ascertain that the vibration values are permissible. It also happens that even if measured values are within permissible guide values, problems may occur owing to the great variety of components which can be attached. Such problems can be, and have to be, rectified by specifi
23、c “local measures” (e.g. by elimination of resonances). Experience has shown, however, that it is possible in the majority of cases to state measurable quantities characterizing the vibratory state and to give guide values for these. This shows that the measurable variables and the guide values perm
24、it a reliable evaluation in most cases. For the quantity described, which characterizes the vibration values of reciprocating piston machines in a simple manner, the term “vibration severity” will be used. The vibration values of reciprocating piston machines are not only affected by the properties
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