1、June 2014 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 21
2、.100.20!%2c?“2156428www.din.deDDIN ISO 15242-3Rolling bearings Measuring methods for vibration Part 3: Radial spherical and tapered roller bearings with cylindrical boreand outside surface (ISO 15242-3:2006 + Cor. 1:2010),English translation of DIN ISO 15242-3:2014-06Wlzlager Geruschprfung (Krpersch
3、allmessung) Teil 3: Radial-Pendelrollenlager und Radial-Kegelrollenlager mit zylindrischer Bohrung undzylindrischer Mantelflche (ISO 15242-3:2006 + Cor. 1:2010),Englische bersetzung von DIN ISO 15242-3:2014-06Roulements Mthodes de mesurage des vibrations Partie 3: Roulements rotule sur rouleaux et r
4、ouleaux coniques, alsage et surfaceextrieure cylindriques (ISO 15242-3:2006 + Cor. 1:2010),Traduction anglaise de DIN ISO 15242-3:2014-06Together with DIN ISO 15242-2:2014-06 andDIN ISO 15242-4:2014-06supersedesDIN 5426-1:1995-07www.beuth.deDocument comprises pagesIn case of doubt, the German-langua
5、ge original shall be considered authoritative.12DIN ISO 15242-1:2014-06,06.14 A comma is used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliography 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Terms and definitions .6 4 Measurement process .
6、7 4.1 Speed of rotation .7 4.2 Bearing axial load 7 5 Measurement and evaluation methods .7 5.1 Physical quantity measured .7 5.2 Frequency range 7 5.3 Peak measurement 8 5.4 Testing sequence.8 6 Conditions for measurement 8 6.1 Bearing conditions for measurement 8 6.2 Conditions of the test environ
7、ment .9 6.3 Conditions for the test device 9 6.4 Requirements for the operator .11 Annex A (normative) Measurement of external axial loading alignment 12 2 DIN ISO 15242-3:2014-06 DIN ISO 15242-3:2014-06 3 National foreword This document (ISO 15242-3:2006 + Cor. 1:2010) has been prepared by Technica
8、l Committee ISO/TC 4 “Rolling bearings”, (Secretariat: SIS, Sweden). The responsible German body involved in its preparation was the Normenausschuss Wlz- und Gleitlager (Rolling Bearings and Plain Bearings Standards Committee), Working Committee NA 118-01-04 AA Toleranzen, Prf- und Messverfahren. At
9、tention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document
10、are as follows: ISO 286-2 DIN EN ISO 286-2 ISO 1132-1 DIN ISO 1132-1 ISO 3448 DIN ISO 3448 ISO 5593 DIN ISO 5593 DIN 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
11、 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 Amendments This standard differs from DIN 5426-1:1995-07 as follows: a) the technical content
12、of DIN 5426-1 has been revised and divided up among the standards of the DIN ISO 15242 series, with one part covering the fundamentals and the other parts covering vibration measurement methods for different types of rolling bearing; b) the standard has been editorially revised. Previous editions DI
13、N 5426-1: 1995-07 National Annex NA (informative) Bibliography DIN EN ISO 286-2, Geometrical product specifications (GPS) ISO code system for tolerances on linear sizes Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts DIN ISO 1132-1, Rolling bearings Tolerances P
14、art 1: Terms and definitions DIN ISO 3448, Industrial liquid lubricants ISO viscosity classification DIN ISO 5593, Rolling bearings Vocabulary 4 DIN ISO 15242-3:2014-06 Introduction Vibration of rotating rolling bearings is a complex physical phenomenon dependent on the conditions of operation. Meas
15、uring 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 mechanical system i
16、ncorporating 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 be defined as any di
17、sagreeable 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 measurement of the
18、 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 vibration of a bearing is
19、 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 to select
20、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 part of I
21、SO 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. 5 5 DIN ISO 15242-3:2014-06 1 Scope This part of ISO 15242 specifies vibration measuring methods for double-row radial spheri
22、cal roller bearings and single-row 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
23、 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 edition of the reference document (including any amendments) applies.
24、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 testing Standard atmospheres Definitions ISO 1132-1, Rolling bearings
25、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 15242-1:2004, Rolling bearings Measuring methods for vibration Part 1:
26、 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. 6 DIN ISO 15242-3:2014-06 4 Measurement process 4.1 Speed of rotation The default speed of rotation shall be 15 s1(900 r/min), with a tole
27、rance of 12+%. Other speeds 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 20 s1to 30 s1(1 200 r/min to 1 800 r/min) in order to obtain an adequate vibration signal. Conversely,
28、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 possible 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
29、 values for bearing axial load Single-row and double-row radial tapered roller bearings Double-row radial spherical roller bearings 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 18
30、0 220 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 1 440 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
31、 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 possible roller, rib and raceway damage. 5 Measurement and evaluation methods 5.1 Physical quantity measured 5.2 Frequency range The velocity signal shall be measured
32、 in one or more bands with default frequency ranges as specified in Table 2. The default physical quantity to be measured is vibration velocity, r.m.s.(m/s) , in the radial direction. N1)N1) National footnote: r.m.s. = root mean square 7 7 DIN ISO 15242-3:2014-06 Table 2 Default frequency ranges Low
33、 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 speed. For pract
34、ical 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 specific ranges have gre
35、ater 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 bearing, may be consid
36、ered 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 applied from one
37、 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 ring in different a
38、ngular 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. 6 Conditions fo
39、r 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 decrease bearing vibrati
40、on 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 vibration levels. 8
41、 DIN ISO 15242-3:2014-06 6.1.2 Cleanliness of the bearing Since contamination affects 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 v
42、ibration 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
43、 3448. The lubrication procedure shall include some running-in to achieve homogeneous distribution of the lubricant within the bearing. NOTE Other lubricant viscosities may be agreed upon between the manufacturer and the customer in order to suit the application. 6.2 Conditions of the test environme
44、nt The bearings shall be tested at room temperature in an environment that does not influence the bearing vibration. Additional information is given in ISO 554, ISO 558 and ISO 3205. 6.3 Conditions for the test device 6.3.1 Stiffness of the spindle/mandrel arrangement The spindle (including the mand
45、rel) used to hold and drive the bearing inner ring shall be so designed and constructed that, except for transmittal of rotary motion, it represents essentially a rigid reference system for the inner ring axis. The transmission of vibration between the spindle/mandrel arrangement and the bearing inn
46、er ring in the frequency band used shall be negligible by comparison to the velocities measured (in cases of dispute, precise values shall be agreed upon between the manufacturer and the customer). 6.3.2 Loading mechanism The loading system used to apply load to the bearing outer ring shall, ideally
47、, be designed and constructed so that it leaves the ring essentially free to vibrate in all radial, axial, angular or flexural modes according to the bearing type. 6.3.3 Magnitude and alignment of the external load applied to the bearing A constant external axial load of the magnitude specified in 4
48、.2 shall be applied to the outer ring. The distortion of the bearing rings, caused by contact with elements of the mechanical unit, shall be negligible in comparison to the inherent geometrical accuracy of the bearing under test. The position and direction of the externally applied load shall coincide with the spindle axis of rotation within the limits given in Figure 1 and Table 3. See Annex A for a measurement description. 9 9 DIN ISO 15242-3:2014-06 aAxis of externally applie
