ISO 7919-3 PDF

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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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The main task of technical committees is to prepare International Standards. 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. Finally, you’ll never receive email notifications about content they create or likes they designate for your content. Have you added an attachment 79199-3 your post?

Criterion II is specified on the basis of the change in shaft vibration magnitude occurring under steady-state operating conditions.

Therefore, in certain cases the shaft displacement limits given iao this part of ISO may exceed the available clearance. Actually as I look online at the title ofit is for industrial machines, and since you are doing a 55mW you probably should be using Sometimes getting the OEM recommendation may involve making a phone call or an email.

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In industrial machines, shaft vibration relative to the bearing is normally measured. Change in vibration magnitude This criterion provides an assessment of a change in vibration magnitude from a previously established reference or baseline value for particular steady-state conditions.

It presents the UK view on standards in Europe and at the international level. In general, if an ALARM situation occurs, operation can continue for a period whilst investigations are carried out to identify the reason for the change in vibration and define any remedial action.

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 Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards: This equipment can be more sophisticated than that used for normal supervisory monitoring and its use and application requires specialist knowledge.

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Machines with vibration within this zone are normally considered acceptable for unrestricted long- term operation. The numerical values specified are not intended to serve as the only basis for vibration evaluation since, in general, the vibratory condition of a machine is assessed by consideration of both the shaft vibration and the associated structural vibration.

7991-3 Membership Required We’re sorry. A general description of the principles that are generally applicable for the measurement and evaluation of shaft vibration of 79199-3 machines is outlined in ISO This publication does not purport to include all the necessary provisions of a contract.

Consequently, it can be difficult to identify the effects of the crack propagation by looking at the change in the broad-band vibration only. 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.

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In downloading this file, parties accept therein the respons bility of not infringing Adobe’s licensing policy. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designations. The vibration magnitude is the higher value of the peak-to-peak displacement measured in two selected orthogonal measurement directions.

However, for those machines for which continuous monitoring of vibration is employed, it is common practice to establish operational vibration limits.

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. For example, with a tilting pad bearing it might be necessary to specify alternative vibration values, whilst in the case of an elliptical bearing different vibration criteria can apply for the directions ixo maximum and minimum bearing clearance.

Vibration magnitude at rated speed under steady operating conditions This criterion is concerned with defining limits for shaft vibration magnitude consistent with acceptable dynamic loads on the bearings, adequate margins on the radial clearance envelope of the machine, and acceptable vibration transmission into the support structure and foundation.

Vibration magnitude at rated speed under steady operating conditions This criterion is concerned with defining limits for shaft vibration magnitude consistent with acceptable dynamic loads on the bearings, adequate margins on the radial clearance envelope of the machine, and acceptable vibration transmission into the support structure and foundation.

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We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover.

No part of these publications may be reproduced in any form without the prior permission in writing of BIS. In such cases the evaluation zone limits should be adjusted accordingly. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing.

If only one measuring direction is used, care should be taken to ensure that it provides adequate information see ISO In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

Different operational ALARM settings may then exist for different bearings on the machine, reflecting differences in dynamic loading and bearing support stiffnesses.

The recommended values illustrated in Figure A. Where there is no established baseline for example, with a new machine the initial ALARM setting should be based either on experience with other similar machines or relative to agreed acceptance values.

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

Vibration values within this zone are normally considered to be of sufficient severity to cause damage to the machine. Rotodynamic pumps for industrial applications, including measurements on rotating shafts 7 Bureau of Indian Standards BIS is a statutory institution establislned under tine Bureau of Indian Standards Act, to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country.

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. However, for those machines for which continuous monitoring of vibration is employed, it is common practice to establish operational vibration limits.