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Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

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“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS/ISO 8528-9 (1995): Reciprocating Internal CombustionEngine Driven Alternating Current Generating Sets, Part 9:Measurement and Evaluation of Mechanical Vibrations [TED 2:Automotive Primemovers]

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Indian StandardRECIPROCATING INTERNAL COMBUSTIONENGINE DRIVEN ALTERNATING CURRENT

GENERATING SETSPART 9 MEASUREMENT AND EVALUATION OF MECHANICAL VIBRATIONS

ICS 29.160.40

© BIS 2012

November 2012 Price Group 7

B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

IS/ISO 8528-9 : 1995

Automotive Primemovers Transmission and Steering Systems and Internal Combustion EnginesSectional Committee, TED 2

NATIONAL FOREWORD

This Indian Standard (Part 9) which is identical with ISO 8528-9 : 1995 ‘Reciprocating internalcombustion engine driven alternating current generating sets — Part 9: Measurement and evaluationof mechanical vibration’ issued by the International Organization for Standardization (ISO) was adoptedby the Bureau of Indian Standards on the recommendation of the Automotive Primemovers Transmissionand Steering Systems and Internal Combustion Engines Sectional Committee and approval of theTransport Engineering Division Council.

The text of ISO Standard has been approved as suitable for publication as an Indian Standard withoutdeviations. Certain conventions are, however, not identical to those used in Indian Standards. Attentionis particularly drawn to the following:

a) Wherever the words ‘International Standard’ appear referring to this standard, they should beread as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practiceis to use a point (.) as the decimal marker.

In this adopted standard, reference appears to certain International Standards for which IndianStandards also exist. The corresponding Indian Standards which are to be substituted in their respectiveplaces are listed below along with their degree of equivalence for the editions indicated:

International Standard Corresponding Indian Standard Degree of Equivalence

1S0 2041 : 1990 Vibration and shock— VocabularyISO 5348 : 1998 Mechanical vibrationand shock — Mechanical mountingof accelerometersISO 8528-5 : 1993 Reciprocatinginternal combustion engine drivenalternating current generating sets —Part 5: Generating setsIEC 34-7 : 1992 Rotating electricalmachines — Part 7 : Classificationof types of construct ions andmounting arrangements (IM Code)

IS 11717 : 2000 vibration and shock— VocabularyIS 14883 : 2000 Mechanical vibrationand shock — Mechanical mountingof accelerometersIS/ISO 8528-5 : 2005 Reciprocatinginternal combustion engine drivenalternating current generating sets:Part 5 Generating setsIS 2253 :1974 Designation for typesof construct ion and mountingarrangement of rotating electricalmachines (first revision)

Identical

do

Identical withISO 8528-5 : 2005

Technically Equivalent

For the purpose of deciding whether a particular requirement of this standard is complied with, thefinal value, observed or calculated, expressing the result of a test or analysis, shall be rounded off inaccordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number ofsignificant places retained in the rounded off value should be the same as that of the specified valuein this standard.

Indian StandardRECIPROCATING INTERNAL COMBUSTIONENGINE DRIVEN ALTERNATING CURRENT

GENERATING SETSPART 9 MEASUREMENT AND EVALUATION OF MECHANICAL VIBRATIONS

IS/ISO 8528-9 : 1995

1

2

IS/ISO 8528-9 : 1995

IS/ISO 8528-9 : 1995

3

4

IS/ISO 8528-9 : 1995

Annex A (informative)

ISO 8528-9: 1995(E)

Typical generating set configurations

There are a number of possibilities for the assembly of a reciprocating internal combustion engine and a generator. Figures A.1 to A.6 show examples of typical configurations.

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Figure A.l - Engine and generator rigidly mounted

I I I I I I I I 1, T

m -_~-- _~_-_ L

Figure A.2 - Engine resiliently mounted, generator rigidly mounted, flexible coupling

r

I I I I I I I I 1,

m I - -_~- ~--_ ~_ -~---- I w 1 \

Figure A.3 - Engine and generator rigidly mounted on resiliently mounted base frame

IS/ISO 8528-9 : 1995

5

ISO 8528-9: 1995(E)

Figure A.4 - Engine resiliently mounted, generator rigidly mounted on resiliently mounted base frame, flexible coupling

Figure A.5 - Assembly with flange housing and resilient mounting on the engine and generator

Figure A.6 - Assembly with flange housing and resilient mounting of the engine

6

IS/ISO 8528-9 : 1995

ISO 8528-9: 1995(E)

Annex B (informative)

Remarks on the assessment of vibrations of the generating set

It has been found that generators operating in gener- ating sets suffer higher values of Vibration severity compared with those running independently.

Typical features of RIC engines are the oscillating masses, torque fluctuation and pulsating forces in the associated Pipe-work. All these features exert con- siderable alternating forces on the main supports and give rise to high Vibration amplitudes on the main frame. The Vibration amplitudes are generally higher than those for rotating machinery, but since they are largely influenced by the design features of the gen- erating Sets, they tend to remain more constant over the life of the RIC engine than they do for rotating machinery.

The Vibration values determined by using this part of ISO 8528 allow us to make a general Statement on the vibrational behaviour of the generating set and a general assessment of the running behaviour and the Vibration interactions of the total set. However, the determined Vibration values do not allow us to make a Statement on the mechanical Stresses of fixed or moving Parts of the generating Sets.

Neither do the determined values of Vibration severity allow us to make a Statement of the torsional and linear vibrational behaviour of the shaft System.

Even if accurate assessment of mechanical Stresses in the generating set by using Vibration measurement is not possible, experience has shown that the vi- bration level above which important Parts of the gen- erating set are mechanically damaged by undue Vibration stress is usually significantly higher than the level which is accepted as “usual” from experience with similar generating Sets.

However, if the above “usual” ranges are exceeded, darnage to additional attachments and connecting Parts of the generating set, as well as to governing and monitoring devices, etc., may occur.

The sensitivity of these components depends on their design and how they are mounted. Thus, in some in- dividual cases, it may be difficult to avoid Problems even when the assessment value lies in the “usual” range. Such Problems have to be rectified by specific “local measures” on the generating set (e.g. by elim- ination of mounted component resonances).

IS/ISO 8528-9 : 1995

7

8

IS/ISO 8528-9 : 1995

[ Blank Page ]

IS/ISO 8528-9 : 1995

9

0

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fig

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see

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3)

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m 0 0

10

IS/ISO 8528-9 : 1995

IS/ISO 8528-9 : 1995

11

12

IS/ISO 8528-9 : 1995

IS/ISO 8528-9 : 1995

13

14

IS/ISO 8528-9 : 1995

IS/ISO 8528-9 : 1995

15

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goodsand attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in course of imple-menting the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicates thatno changes are needed; if the review indicates that changes are needed, it is taken up for revision. Usersof Indian Standards should ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of ‘BIS Catalogue’ and ‘Standards: Monthly Additions’.

This Indian Standard has been developed from Doc No.: TED 2 (781).

Amendments Issued Since Publication______________________________________________________________________________________

Amendment No. Date of Issue Text Affected______________________________________________________________________________________

______________________________________________________________________________________

______________________________________________________________________________________

______________________________________________________________________________________

______________________________________________________________________________________

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