1、June 2014Translation by DIN-Sprachendienst.English price group 10No 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“2156429www.din.deDDIN ISO 15242-4Rolling bearings Measuring methods for vibration Part 4: Radial cylindrical roller bearings with cylindrical bore andoutside surface (ISO 15242-4:2007),English translation of DIN ISO 15242-4:2014-06Wlzlager Geruschprfung (Krperschallmessung) Teil 4: Radia
3、l-Zylinderrollenlager mit zylindrischer Bohrung und zylindrischer Mantelflche(ISO 15242-4:2007),Englische bersetzung von DIN ISO 15242-4:2014-06Roulements Mthodes de mesurage des vibrations Partie 4: Roulements radiaux rouleaux cylindriques, alsage et surface extrieurecylindriques (ISO 15242-4:2007)
4、,Traduction anglaise de DIN ISO 15242-4:2014-06Together withDIN ISO 15242-1:2014-06,DIN ISO 15242-2:2014-06 andDIN ISO 15242-3:2014-06supersedesDIN 5426-1:1995-07www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 15 pages06.14 A comma is u
5、sed 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 7 4.1 Speed of rotation 7 4.2 Bearing radial and axial loads .7 5 Measurement and evaluat
6、ion methods 8 5.1 Physical quantity measured 8 5.2 Frequency range .8 5.3 Peak measurement .8 5.4 Testing sequence8 6 Conditions for measurement .9 6.1 Bearing conditions for measurement .9 6.2 Conditions of the test environment 9 6.3 Conditions for the test device .9 6.4 Requirements for the operat
7、or . 13 Annex A (normative) Measurement of external radial loading alignment . 14 Annex B (normative) Measurement of external axial loading alignment 15 2DIN ISO 15242-4:2014-06National foreword This document (ISO 15242-4:2007) has been prepared by Technical Committee ISO/TC 4 “Rolling bearings”, (S
8、ecretariat: 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. Attention is drawn to the possibility that so
9、me 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 are as follows: ISO 286-2 DIN EN ISO 286-2
10、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 bore and outside surface Part 3: Radial do
11、uble-row 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 of DIN 5426-1 has been revised a
12、nd 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 DIN 5426-1: 1995-07 3DIN ISO 15242
13、-4:2014-06National 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 Part 1: T
14、erms and definitions DIN ISO 3448, Industrial liquid lubricants ISO viscosity classification DIN ISO 5593, Rolling bearings Vocabulary 4DIN ISO 15242-4:2014-06Introduction Vibration of rotating rolling bearings is a complex physical phenomenon dependent on the conditions of operation. Measuring the
15、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 incorporati
16、ng 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 ISO 15242 (all parts) can be defined as any disa
17、greeable 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 s
18、tructure-borne 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 vibra
19、tion 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
20、 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 1
21、5242. This 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. Rolling bearings Measuring methods for vibration Part 4: Radial cylindrical roller bearin
22、gs with cylindrical bore and outside surface 5DIN ISO 15242-4:2014-061 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 and double-row radial cylindrical roller
23、 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 edition of the referenced document (includin
24、g 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 testing Standard atmospheres Definitions IS
25、O 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 15242-1:2004, Rolling bearings Measuring me
26、thods 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. 6DIN ISO 15242-4:2014-064 Measurement process 4.1 Speed of rotation The default speed of rotation shall be 30 s
27、1(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 and tolerances may be used by agreement between the manufacturer and t
28、he customer; e.g. it may be necessary to use a higher speed for bearings in the smaller size range 40 s1to 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 a lower speed for bearings in the larger size range 7,5 s1to 10 s1(450
29、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 bearing radial load Single-row radial cylindrical roller bearings Double-row r
30、adial cylindrical roller bearings Bearing outside diameter D 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 70 100 225 275 315 385 100 140 315 385 430 520 140 170 430 520 565 685 170 200 565 685 720 880 Other radial loads and tolerance
31、s 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 possible roller, rib and raceway damage. For bearings capable of taking axial l
32、oad, 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. Actual values depend on load angle used (see Figure 3). 7DIN ISO 15242-4
33、:2014-065 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 with default frequency ranges as speci
34、fied in Table 2. Table 2 Default frequency ranges Speed of rotation Low band (L) aMedium band (M) aHigh band (H) aDefault frequencies min. max. flowfhighflowfhighflowfhighr/min Hz Hz Hz 882 909 50 150 150 900 900 5 000 1 764 1 818 50 300 300 1 800 1 800 10 000 aFor rotational speeds other than the n
35、ominal 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 be used, unless agreed upon betweenthe manufacturer and the customer. NOTE Other frequency ranges may be conside
36、red 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 analysis of the vibration signal is an alternative. 5.3 Peak measurement Detection of peaks or spikes in the time do
37、main 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 customer. Various evaluation methods exist depending on the bearing type and the application. 5.4 Testing sequence
38、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. An axial load may be necessary to ensure stable operation. If the axial load is used, it is applied from one sid
39、e 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 diagnostic purposes, performing multiple measurements with the outer ring in different angular positions relative to
40、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. 8DIN ISO 15242-4:2014-06N1) National footnot
41、e: r.m.s. = root mean square N1)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
42、lubricants increase or decrease 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
43、 the source of unacceptable vibration levels. 6.1.2 Cleanliness of the bearing Since contamination affects vibration levels, the bearings must be cleaned effectively, taking care not to introduce contamination or other sources of vibration. NOTE Some preservatives may meet the lubrication requiremen
44、ts (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 informa
45、tion is given in ISO 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 o
46、f the test environment 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
47、 (including the mandrel) 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
48、 and the bearing inner ring in the frequency band used shall be negligible by comparison to the velocities measured (in cases of dispute, precise values shall be agreed between the manufacturer and the customer). 6.3.2 Loading mechanism The loading system used to apply load to the bearing outer ring
49、 shall, ideally, 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. 9DIN ISO 15242-4:2014-066.3.3 Magnitude and alignment of the external load applied to the bearing A constant external radial load of the magnitude specified in 4.2 together with the recommended axial load, if applicable, shall be applied to the ou
