1、 Reference numberISO 15242-3:2006(E)ISO 2006INTERNATIONAL STANDARD ISO15242-3First edition2006-01-15Rolling bearings Measuring methods for vibration Part 3: Radial spherical and tapered roller bearings with cylindrical bore and outside surface Roulements Mthodes de mesurage des vibrations Partie 3:
2、Roulements rotule sur rouleaux et rouleaux coniques, alsage et surface extrieure cylindriques Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 15242-3:2006(E) PDF dis
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7、 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 2006 All rights reservedCopyright International Organization for Standardization Provided by IHS under license w
8、ith ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 15242-3:2006(E) ISO 2006 All rights reserved iiiContents 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 B
9、earing axial load 2 5 Measurement and evaluation methods .2 5.1 Physical quantity measured .2 5.2 Frequency range2 5.3 Peak measurement 3 5.4 Testing sequence.3 6 Conditions for measurement3 6.1 Bearing conditions for measurement3 6.2 Conditions of the test environment .4 6.3 Conditions for the test
10、 device 4 6.4 Requirements for the operator .6 Annex A (normative) Measurement of external axial loading alignment 7 Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO
11、15242-3:2006(E) iv ISO 2006 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each me
12、mber body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International E
13、lectrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards ad
14、opted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of 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 pa
15、tent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15242-3 was prepared by Technical Committee ISO/TC 4, Rolling bearings. ISO 15242 consists of the following parts, under the general title Rolling bearings Measuring methods for vibration: Part 1: Funda
16、mentals Part 2: Radial ball bearings with cylindrical bore and outside surface Part 3: Radial spherical and tapered roller bearings with cylindrical bore and outside surface Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface Copyright International Organization for
17、Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 15242-3:2006(E) ISO 2006 All rights reserved vIntroduction Vibration of rotating rolling bearings is a complex physical phenomenon dependent on the conditions
18、 of operation. Measuring the vibration 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
19、mechanical system incorporating the bearing 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 this document can b
20、e defined as any disagreeable and 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
21、 measurement of the structure-borne vibration of rotating rolling bearings are addressed in this part of ISO 15242. 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 vibrat
22、ion of a 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
23、required 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 15
24、242. This part of ISO 15242 serves to define the detailed method for assessing vibration of radial spherical and tapered roller bearings with cylindrical bore and outside surface on a test rig. Copyright International Organization for Standardization Provided by IHS under license with ISO Not for Re
25、saleNo reproduction or networking permitted without license from IHS-,-,-Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-INTERNATIONAL STANDARD ISO 15242-3:2006(E) ISO 2
26、006 All rights reserved 1Rolling bearings Measuring methods for vibration Part 3: Radial spherical and tapered roller bearings with cylindrical bore and outside surface 1 Scope This part of ISO 15242 specifies vibration measuring methods for double-row radial spherical roller bearings and single-row
27、 and double-row radial tapered roller bearings, with a contact angle up to and including 45, under established test conditions. It covers double-row radial spherical roller bearings as well as single-row and double-row radial tapered roller bearings with cylindrical bore and outside surface. 2 Norma
28、tive 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 edition of the reference document (including any amendments) applies. ISO 286-2, ISO system of limits an
29、d 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 testing Standard atmospheres Definitions ISO 1132-1, Rolling bearings Tolerances Part 1: Terms and defin
30、itions 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 15242-1:2004, Rolling bearings Measuring methods for vibration Part 1: Fundamentals 3 Terms and definiti
31、ons For the purposes of this document, the terms and definitions given in ISO 1132-1, ISO 2041, ISO 5593 and ISO 15242-1 apply. Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from I
32、HS-,-,-ISO 15242-3:2006(E) 2 ISO 2006 All rights reserved4 Measurement process 4.1 Speed of rotation The default speed of rotation shall be 15 s1(900 r/min), with a tolerance of 12+%. Other speeds and tolerances may be used by agreement between the manufacturer and the customer; e.g. it may be neces
33、sary to use a higher speed for bearings in the smaller size range 20 s1to 30 s1(1 200 r/min to 1 800 r/min) in order to obtain an adequate vibration signal. Conversely, it may be necessary to use a lower speed for bearings in the larger size range 7,5 s1to 10 s1(450 r/min to 600 r/min) to avoid poss
34、ible roller, rib and raceway damage. 4.2 Bearing axial load The bearing load shall be in the axial direction with default values as specified in Table 1. Table 1 Default values for bearing axial load Single-row and double-row radial tapered roller bearings Double-row radial spherical roller bearings
35、 Contact angle u 23 Contact angle 23 u 45 Bearing outside diameter D Default values for bearing axial load u min. max. min. max. min. max. mm N N N 30 50 45 55 90 110 180 220 50 70 90 110 180 220 360 440 70 100 180 220 360 440 720 880 100 140 360 440 720 880 1 080 1 320 140 170 540 660 1 080 1 320 1
36、 440 1 760 170 200 720 880 1 440 1 760 1 800 2 200 Other axial 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 avo
37、id possible roller, rib and raceway damage. 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 range The velocity signal shall be measured in one or more bands wit
38、h default frequency ranges as specified in Table 2. Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 15242-3:2006(E) ISO 2006 All rights reserved 3Table 2 Default fre
39、quency ranges Low band (L) aMedium band (M) aHigh band (H) aSpeed of rotation Default frequencies min. max. flowfhighflowfhighflowfhighr/min Hz Hz Hz 882 909 50 150 150 900 900 5 000 a For rotational speeds other than the nominal 900 r/min, the frequency range should be adjusted in proportion to the
40、 speed. For practical reasons, frequencies lower than 50 Hz or higher than 10 000 Hz should not be 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 specifi
41、c ranges have greater importance to successful operation of the bearing. The use of spectral analysis 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 beari
42、ng, may be considered as a supplementary option by agreement between the manufacturer and the customer. Various evaluation methods exist depending on the bearing type and the application. 5.4 Testing sequence Double-row radial spherical and tapered roller bearings shall be tested with the axial load
43、 applied from one side of the outer ring and the test repeated with the axial load on the other side of the outer ring. Single-row radial tapered roller bearings shall be tested in their axial load acceptance direction only. For diagnostic purposes, performing multiple measurements with the outer ri
44、ng in different angular positions relative to the pick-up is appropriate. For acceptance of the bearing, the highest vibration reading for the appropriate frequency range shall be within the limits mutually agreed between the manufacturer and the customer. For test duration see ISO 15242-1:2004, 6.5
45、. 6 Conditions for measurement 6.1 Bearing conditions for measurement 6.1.1 Prelubrication Prelubricated (greased, oiled or solid lubricated) bearings, including sealed and shielded types, shall be tested in the as-delivered condition. NOTE Some greases, oils and solid lubricants increase or decreas
46、e bearing vibration levels in comparison with the reference conditions in 6.1.2 and 6.1.3. The following reference condition procedures (6.1.2 and 6.1.3) normally apply for bearings that are not prelubricated. However, they may also be used in cases of dispute regarding the source of unacceptable vi
47、bration levels. Copyright International Organization for Standardization Provided by IHS under license with ISO Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ISO 15242-3:2006(E) 4 ISO 2006 All rights reserved6.1.2 Cleanliness of the bearing Since contamination af
48、fects vibration levels, the bearings shall be cleaned effectively, taking care not to introduce contamination or other sources of vibration. NOTE Some preservatives may meet the lubrication requirements (see 6.1.3) for vibration testing. In this case, it is not necessary to remove the preservative. 6.1.3 Lubrication Before testing, bearings shall be adequately lubricated with filtered oil (0,8 m maximum filter), having a nominal viscosity in the range of 10 mm2/s to 100 mm2/s. Additional information is given in ISO 344
