ISO MECHANICAL VIBRATION – EVALUATION OF MACHINE VIBRATION BY MEASUREMENTS ON ROTATING SHAFTS – PART 3: COUPLED . Mechanical vibration – Evaluation of machine vibration by measurements on rotating shafts – Part 3: Coupled industrial machines (ISO. Full text of “IS/ISO Mechanical vibration – evaluation of machine vibration by measurements on rotating shafts, Part 3: Coupled Industrial Machines”.
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ISO shall not be held responsible for identifying any or all such patent rights. However, they provide guidelines for ensuring that gross deficiencies or unrealistic requirements are avoided. In uso cases, it is normally necessary to explain the reasons for this and, in particular, to confirm that the machine will not be endangered by operating with higher vibration values.
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Adobe is a trademark of Adobe Systems Incorporated. Consequently different values can apply for measurements taken at different bearings on the same rotor line.
This Indian Iwo has been developed from Doc No.: On the attach given at Annex A, Table A. Consequently, it can be difficult to identify the effects of the crack propagation by looking at the change in the broad-band vibration only. In certain cases, there can be specific features associated with a particular machine, which would require different zone boundary values lower or higher to be 7991-3. They apply for normal slow changes in load but do not apply when different conditions exist or during transient changes, for example during start-up and shut-down and when passing through iwo ranges.
A decision on what action can be taken, if any, should then be made after consideration of the maximum value of vibration and whether the machine has stabilized at a new condition. In these cases alternative criteria are necessary. In certain cases, 791-3 can be specific features associated isi a particular machine, which would require different zone boundary values lower or higher to be used.
One criterion considers the magnitude of the observed broad-band relative shaft vibration; the second considers changes in magnitude, irrespective of whether they are increases or decreases. A general description of the principles that are generally applicable for the measurement and evaluation of shaft vibration of non-reciprocating machines is outlined in ISO In downloading this file, parties accept therein the respons bility of not infringing Adobe’s licensing policy.
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I’ll check later on something newer and what may have to say. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Consequently, it can be difficult to identify the effects of the crack propagation by looking at the change in the broad-band vibration only.
For example, the propagation of a crack in a rotor can introduce a progressive change in vibration components at multiples of rotational frequency, but their magnitude might be small relative to the amplitude of the once-per- revolution rotational frequency component. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision.
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Vibration values within this zone are normally considered to be of sufficient severity to cause damage to the machine. In particular, the conditions for in-situ operation, performing acceptance tests and the influence of bearing clearance given in ISO shall be taken into account when evaluating the shaft vibration of pumps This part of ISO is neither applicable to land-based steam turbine-generator sets for power stations with outputs greater than 50 MW see ISOnor machine sets in hydraulic power generating and pumping plants with outputs of 1 MW or greater see ISO Vibration values within this zone are normally considered to be of sufficient severity to cause damage to the machine.
The values chosen will normally be set relative to a baseline value determined from experience for the measurement position or direction for that particular machine. It is the constant aim of BSI to improve the quality of our products and services.
The values presented are the result of experience with machinery of this type and, if due regard is paid to them, acceptable operation can be expected. Rotodynamic pumps for industrial applications, including measurements on rotating shafts?????
In this adopted standard, reference appear to the following International Standard for which Indian Standard also exists. If the TRIP limit is exceeded, immediate action should be taken to reduce the vibration or the machine should be shut down.
Mechanical vibration – evaluation of machine vibration by measurements on rotating shafts, Part 3: A decision on what action can be taken, if any, should then be made after consideration of the maximum value of vibration and whether the machine has stabilized at a new condition.
BS ISO 机械振动.通过对旋转轴的测量评估机械振动.耦合工业机械 – MBA智库文档
Attention is drawn to the possibility that some of isso elements of this document may be the subject of patent rights. Such things are often in the Tech manual. Part 1 General guidelines For the purpose of deciding whether a particular requirement of this standard is complied with the final value, ido or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2: However, it should be noted that for diagnostic purposes it might be desirable to cover a wider frequency range.
Quoting “The values given in Tables A. This publication does not purport to include all the necessary provisions of a contract.
This equipment can be more sophisticated than that used for normal supervisory monitoring and its use and application requires specialist knowledge. Sign In or Register. No part of these publications may be reproduced in any form without the prior permission in writing of BIS.