ABMA 15242-4-2012 Rolling bearings - Measuring methods for vibration - Part 4 Radial cylindrical roller bearings with cylindrical bore and outside surface.pdf

1、 Rolling bearings - Measuring methods for vibration - - Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface ANSI/ABMA/ISO 15242-4-2012 Sponsor American Bearing Manufacturers Association ANSI/ABMA/ISO 15242-4-2012 (Identical Adoption of ISO 15242-4:2007) Copyright Ame

2、rican Bearing Manufacturers Association, Inc. Neither part of the printed publication, nor any part of the electronic tile may be reproduced or transmitted in any form, including transmittal by e-mail, by file transfer protocol (FTP), or by being made part of a network-accessible system, without the

3、 prior written permission of the copyright owner. ABMA FOREWORD (This foreword is not part of ANSI/ABMA/ISO 15242-4-2012.) IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of developing International Standar

4、ds is carried out through IS0 technical committees. Every member body interested in a subject for which a technical committee has been authorized has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in

5、the work. The text is approved as an International Standard if a two-thirds majority of the P (participating)-members of the TC/SC are in favor and not more than one-quarter of the total number of votes cast are negative. International Standard 15242-4-2007 was prepared by Technical Committee ISO/TC

6、 4, Rolling Bearings / Subcommittee 4, Tolerances, tolerance definitions and symbols (including GPS). This standard was processed and approved for submittal to ANSI for national adoption by Accredited Standards Committee B3. Committee approval of the national adoption of this standard does not neces

7、sarily mean that all committee members voted for its adoption. Suggestions for the improvement of this standard gained through experience with its use will be welcomed. These suggestions should be sent to: ASC B3 Secretariat American Bearing Manufacturers Association 2025 M Street, N.W., Suite 800 W

8、ashington, DC 20036 Title:From AutoCAD Drawing “Logo0002“Creator:TeXMathEditor participial utilitiesPreview:This EPS picture was not savedwith a preview included in it.Comment:This EPS picture will print to aPostScript printer, but not toother types of printers.Reference number ISO 15242-4:2007(E) I

9、SO 2007 INTERNATIONAL STANDARD ISO 15242-4 First edition 2007-10-15 Rolling bearings Measuring methods for vibration Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface Roulements Mthodes de mesurage des vibrations Partie 4: Roulements radiaux rouleaux cylindriques,

10、alsage et surface extrieure cylindriques ISO 15242-4:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on th

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13、rm the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without

14、 permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All rights

15、 reserved ISO 15242-4:2007(E) ISO 2007 All rights reserved iii Contents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Measurement process . 2 4.1 Speed of rotation . 2 4.2 Bearing radial and axial loads 2 5 Measurement and evaluation methods . 3 5

16、.1 Physical quantity measured . 3 5.2 Frequency range 3 5.3 Peak measurement 3 5.4 Testing sequence 3 6 Conditions for measurement 4 6.1 Bearing conditions for measurement 4 6.2 Conditions of the test environment . 4 6.3 Conditions for the test device 4 6.4 Requirements for the operator . 8 Annex A

17、(normative) Measurement of external radial loading alignment 9 Annex B (normative) Measurement of external axial loading alignment 10 ISO 15242-4:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards

18、bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizat

19、ions, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in th

20、e ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of

21、the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15242-4 was prepared by Technical Committee ISO/TC 4, Rolling b

22、earings. ISO 15242 consists of the following parts, under the general title Rolling bearings Measuring methods for vibration: Part 1: Fundamentals Part 2: Radial ball bearings with cylindrical bore and outside surface Part 3: Radial spherical and tapered roller bearings with cylindrical bore and out

23、side surface Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface ISO 15242-4:2007(E) ISO 2007 All rights reserved v Introduction Vibration of rotating rolling bearings is a complex physical phenomenon dependent on the conditions of operation. Measuring the vibration

24、output of an individual bearing under a certain set of conditions does not necessarily characterize the vibration output under a different set of conditions or when the bearing becomes part of a larger assembly. Assessment of the audible sound generated by the mechanical system incorporating the bea

25、ring is complicated further by the influence of the interface conditions, the location and orientation of the sensing device, and the acoustical environment in which the system operates. Assessment of airborne noise, which for the purpose of ISO 15242 (all parts) can be defined as any disagreeable a

26、nd undesired sound, is further complicated by the subjective nature of the terms “disagreeable” and “undesired”. Structure-borne vibration can be considered the driving mechanism that ultimately results in the generation of airborne noise. Only selected methods for the measurement of the structure-b

27、orne vibration of rotating rolling bearings are addressed in the current edition of ISO 15242 (all parts). Vibration of rotating rolling bearings can be assessed by any of a number of means using various types of transducers and test conditions. No simple set of values characterizing vibration of a

28、bearing is adequate for the evaluation of the vibratory performance in all possible applications. Ultimately, a knowledge of the type of bearing, its application and the purpose of the vibration testing (e.g. as a manufacturing process diagnostic or an assessment of the product quality) is required

29、to select the most suitable method for testing. The field of application for standards on bearing vibration is, therefore, not universal. However, certain methods have established a wide enough level of application to be considered as standard methods for the purposes of this part of ISO 15242. This

30、 part of ISO 15242 serves to define the detailed method for assessing vibration of single-row and double-row radial cylindrical roller bearings with cylindrical bore and outside surface on a test rig. INTERNATIONAL STANDARD ISO 15242-4:2007(E) ISO 2007 All rights reserved 1 Rolling bearings Measurin

31、g methods for vibration Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface 1 Scope This part of ISO 15242 specifies vibration measuring methods for single-row and double-row radial cylindrical roller bearings, under established test conditions. It covers single-row

32、and double-row radial cylindrical roller bearings with cylindrical bore and outside surface. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edit

33、ion of the referenced document (including any amendments) applies. ISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO 554, Standard atmospheres for conditioning and/or testing Specifications ISO 558, Conditioning and tes

34、ting Standard atmospheres Definitions ISO 1132-1, Rolling bearings Tolerances Part 1: Terms and definitions ISO 2041, Vibration and shock Vocabulary ISO 3205, Preferred test temperatures ISO 3448, Industrial liquid lubricants ISO viscosity classification ISO 5593, Rolling bearings Vocabulary ISO 152

35、42-1:2004, Rolling bearings Measuring methods for vibration Part 1: Fundamentals 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1132-1, ISO 2041, ISO 5593 and ISO 15242-1 apply. ISO 15242-4:2007(E) 2 ISO 2007 All rights reserved 4 Measurement proces

36、s 4.1 Speed of rotation The default speed of rotation shall be 30 s1 (1 800 r/min) for bearings with outside diameter up to 100 mm and 15 s1 (900 r/min) for outside diameters larger than 100 up to 200 mm. Tolerance of the speed of rotation shall be +12 % of the specified nominal value. Other speeds

37、and tolerances may be used by agreement between the manufacturer and the customer; e.g. it may be necessary to use a higher speed for bearings in the smaller size range 40 s1 to 60 s1 (2 400 r/min to 3 600 r/min) in order to obtain an adequate vibration signal. Conversely, it may be necessary to use

38、 a lower speed for bearings in the larger size range 7,5 s1 to 10 s1 (450 r/min to 600 r/min) to avoid possible roller and raceway damage. 4.2 Bearing radial and axial loads The bearing load shall be in the radial direction with default values as specified in Table 1. Table 1 Default values for bear

39、ing radial load Bearing outside diameter D Single-row radial cylindrical roller bearings Double-row radial cylindrical roller bearings Default values for bearing radial load u min. max. min. max. mm N N 30 50 135 165 165 195 50 70 165 195 225 275 70 100 225 275 315 385 100 140 315 385 430 520 140 17

40、0 430 520 565 685 170 200 565 685 720 880 Other radial loads and tolerances may be used by agreement between the manufacturer and the customer; e.g. depending on bearing design and lubricant used, it may be necessary to use a higher load to prevent roller/raceway slip, or a lower load to avoid possi

41、ble roller, rib and raceway damage. For bearings capable of taking axial load, an axial load of up to 30 N shall be applied on the outer ring to ensure stable operation. The method of applying the radial and axial loads is described in 6.3.3. NOTE Default values for radial loads are resultant values

42、. Actual values depend on load angle used (see Figure 3). ISO 15242-4:2007(E) ISO 2007 All rights reserved 3 5 Measurement and evaluation methods 5.1 Physical quantity measured The default physical quantity to be measured is vibration velocity, r.m.s. (m/s), in the radial direction. 5.2 Frequency ra

43、nge The velocity signal shall be measured in one or more bands with default frequency ranges as specified in Table 2. Table 2 Default frequency ranges Speed of rotation Low band (L) a Medium band (M) a High band (H) a Default frequencies min. max. flow fhigh flow fhigh flow fhigh r/min Hz Hz Hz 882

44、909 50 150 150 900 900 5 000 1 764 1 818 50 300 300 1 800 1 800 10 000 a For rotational speeds other than the nominal 900 r/min or 1 800 r/min, the frequency range should be adjusted in proportion to the speed. For practical reasons, frequencies lower than 50 Hz or higher than 10 000 Hz should not b

45、e used, unless agreed upon between the manufacturer and the customer. NOTE Other frequency ranges may be considered by agreement between the manufacturer and the customer in those instances where specific ranges have greater importance to successful operation of the bearing. The use of spectral anal

46、ysis of the vibration signal is an alternative. 5.3 Peak measurement Detection of peaks or spikes in the time domain velocity signal, usually due to surface defects and/or contamination in the test bearing, may be considered as a supplementary option by agreement between the manufacturer and the cus

47、tomer. Various evaluation methods exist depending on the bearing type and the application. 5.4 Testing sequence Single-row and double-row radial cylindrical roller bearings shall be tested with the radial load applied in a radial direction on the outer ring and perpendicular to the inner ring axis.

48、An axial load may be necessary to ensure stable operation. If the axial load is used, it is applied from one side of the outer ring. For double-row radial cylindrical roller bearings the test should be repeated, if the design allows, with the axial load on the other side of the outer ring. For diagn

49、ostic purposes, performing multiple measurements with the outer ring in different angular positions relative to the pick-up is appropriate. For acceptance of the bearing, the highest vibration reading for the appropriate frequency band shall be within the limits mutually agreed between the manufacturer and the customer. For test duration, see ISO 15242-1:2004, 6.5. ISO 15242-4:2007(E) 4 ISO 2007 All rights reserved 6 Conditions for measurement 6.1 Bearing conditions for measurem