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GB/T 24610.4-2019: Rolling bearings -- Measuring methods for vibration -- Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 24610.4: Historical versions
Similar standardsGB/T 24610.4-2019: Rolling bearings -- Measuring methods for vibration -- Part 4: Radial cylindrical roller bearings with cylindrical bore and outside surface---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT24610.4-2019 Rolling bearings--Measuring methods for vibration--Part 4.Radial cylindrical roller bearings with cylindrical bore and outside surface ICS 21.100.20 J11 National Standards of People's Republic of China Replaces GB/T 24610.4-2009 Method for measuring vibration of rolling bearings Part 4.Cylindrical holes and cylindrical outer surfaces Cylindrical Roller Bearings Part 4.Radialcylindricalrolerbearingswithcylindricalboreandoutsidesurface (ISO 15242-4..2017, IDT) Published on October 18,.2019 2020-05-01 implementation State Administration of Market Supervision Published by China National Standardization Administration Table of ContentsForeword III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Measurement procedure 1 4.1 Rotation frequency 1 4.2 Bearing radial and axial loads 1 5 Measurement and evaluation methods 2 5.1 Measured physical quantities 2 5.2 Frequency domain 2 5.3 Pulse and sharp pulse measurement 3 5.4 Test 3 6 Measurement conditions 3 6.1 Bearing measurement conditions 3 6.2 Test environmental conditions 3 6.3 Test device conditions 4 Appendix A (Normative) Measurement of centering accuracy with applied radial load 8 Appendix B (Normative) Measurement of centering accuracy with applied axial load 9ForewordGB/T 24610 "Measurement method for rolling bearing vibration" is divided into 4 parts. --- Part 1.Basics; --- Part 2.Radial ball bearings with cylindrical holes and cylindrical outer surfaces; --- Part 3.Spherical roller bearings and tapered roller bearings with cylindrical bore and cylindrical outer surface; --- Part 4.Cylindrical roller bearings with cylindrical bore and cylindrical outer surface. This part is Part 4 of GB/T 24610. This section is drafted in accordance with the rules given in GB/T 1.1-2009. This section replaces GB/T 24610.4-2009 "Method for measuring vibration of rolling bearings. Part 4.Cylindrical holes and cylindrical appearance Cylindrical Roller Bearings '', compared with GB/T 24610.4-2009, the main technical changes are as follows. --- Modified the lower cut-off frequency of the low frequency band with a rotation frequency of 900min-1 (see Table 2, Table 2 of the.2009 edition); --- Added "Example of frequency range of non-set rotation frequency" table (see Table 3); --- Modified the description of the figure (see Figure 2, Figure 2 of the.2009 edition); --- Deleted the "requirements for operators" (see 6.3.6 of the.2009 version). --- Added description of some figures (see Figure A.1, Figure B.1). This section uses translation method equivalent to ISO 15242-4..2017 `` Method for measuring vibration of rolling bearings. Part 4.with cylindrical hole And cylindrical roller bearings with cylindrical outer surfaces. The Chinese documents that have a consistent correspondence with the international documents referenced normatively in this section are as follows. --- GB/T 1800.2-2009 Geometrical Product Specifications (GPS) Limits and Fits Part 2.Standard Tolerance Grades and Hole and shaft limit deviation table (ISO 286-2.1988, MOD) --- GB/T 2298-2010 Vocabulary for mechanical vibration, shock and condition monitoring (ISO 2041..2009, IDT) --- GB/T 4199-2003 Tolerance definition of rolling bearings (ISO 1132-1..2000, MOD) --- GB/T 6930-2002 Vocabulary for rolling bearings (ISO 5593..1997, IDT) --- GB/T 24610.1-2019 Rolling bearing vibration measurement method Part 1.Basics (ISO 15242-1..2015, IDT) This section is proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Rolling Bearing Standardization Technical Committee (SAC/TC98). This section was drafted by. Luoyang Bearing Research Institute Co., Ltd., Wuxi Wald Bearing Co., Ltd., Zhejiang Zhaofeng Electromechanical Co., Ltd. Division, Shandong Camry Bearing Technology Co., Ltd., Fujian Yongan Bearing Co., Ltd., Dalian Baishengyuan Technology Co., Ltd., Hangzhou Bearing Experimental Research Center Co., Ltd. The main drafters of this section. Li Feixue, Qin Zhenshan, Kong Chenhuan, Yan Jingxiang, Zheng Shihao, Hou Yongqiang, Zhang Bowen, Cao Riqi, Chao Zhongkai, Li Xinglin and Zhou Shouhu. The previous versions of the standards replaced by this section are. --- GB/T 24610.4-2009.introductionThe vibration of a rolling bearing is an important operating characteristic. Vibration can affect the performance of a mechanical system with bearings. When vibration When propagated to the environment in which the operating mechanical system is located, it can cause audible noise, which can lead to system damage and even health problems. The vibration of a rolling bearing during rotation is a complex physical phenomenon related to the operating conditions. Single set of shafts measured under a set of conditions The bearing vibration value does not necessarily represent the vibration value under different conditions or when the bearing becomes a part of a larger component. Assessed The sound generated by the mechanical system of the bearing is more complicated.It is also affected by the interface conditions, the position and orientation of the sensing device, and the sound of the system. Impact of the learning environment. Air noise-GB/T 24610 (all parts) is defined as any unpleasant, undesired sound. Because the term "unpleasant, undesired" has a subjective nature, its evaluation is more complicated. It can be considered that the structural vibration of the bearing is Eventually the driving source for air noise. GB/T 24610 (all parts) only includes vibration measurement of selected bearing structures method. Bearing vibration can be evaluated using any of a number of methods, with different evaluation methods using different types of sensors and test conditions. No set of values characterizing bearing vibrations can evaluate bearing vibration performance under all possible conditions of use. Eventually, also It should be based on known bearing types, conditions of use, and vibration testing purposes (e.g. To choose the most suitable test method. Therefore, the scope of application of bearing vibration standards is not universal. But for the purposes of this section, Only certain methods with a very broad scope are established as standard methods. This section details the assessment of the vibration of single and double row cylindrical roller bearings with cylindrical bores and cylindrical outer surfaces on a test device method. Method for measuring vibration of rolling bearings Part 4.Cylindrical holes and cylindrical outer surfaces Cylindrical Roller Bearings 1 Scope This part of GB/T 24610 specifies the vibration measurement methods of single-row and double-row cylindrical roller bearings under the established test conditions. This section applies to single-row and double-row cylindrical roller bearings with cylindrical bore and cylindrical outer surface. 2 Normative references The following documents are essential for the application of this document. For dated references, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. ISO 286-2 Geometric Product Specifications (GPS) Linear Dimensional Tolerance ISO Code System Part 2.Standard Tolerance Classes and Hole and shaft limit deviation table [Geometricalproductspecifications (GPS) -ISO codesystemfortorleranceson linearsizes-Part 2.Tables ofstandardtolerancegradesandlimitdeviationsforholesandshafts] ISO 1132-1 Rolling bearing tolerances-Part 1.Terms and definitions Termsanddefinitions) ISO 2041 Vocabulary for Mechanical Vibration, Shock and Condition Monitoring (Mechanicalvibration, shockandconditionmonito- ring-Vocabulary) ISO 5593 rolling bearing vocabulary (Rolingbearings-Vocabulary) ISO 15242-1..2015 Rolling bearing vibration measurement methods-Part 1.Basics (Rolingbearings-Measuring methodsforvibration-Part 1.Fundamentals) 3 terms and definitions Terms and definitions defined in ISO 1132-1, ISO 2041, ISO 5593 and ISO 15242-1 apply to this document. 4 Measurement procedure 4.1 Rotation frequency For bearings with an outer diameter not greater than 100mm, the setting value of the rotation frequency is 1800min-1 (30s-1); the outer diameter is greater than 100mm ~ For a.200mm bearing, the set value of the rotation frequency is 900min-1 (15s-1), and the deviation is 1-2% of the nominal rotation frequency. After negotiation between the manufacturer and the user, other rotation frequencies and deviations can also be used. For smaller bearings, for example, Higher rotation frequency in order to obtain a proper vibration signal. Conversely, for bearings with larger dimensions, a lower rotation frequency can be used. To avoid possible damage to rollers and raceways. 4.2 Bearing radial and axial loads Radial load should be applied to the bearing, and its set values are specified in Table 1. After consultation between the manufacturer and the user, other radial loads and deviations can also be used. For example, depending on the bearing structure, Lubricants can be used with higher loads to prevent roller and raceway slippage; or lower loads to avoid rollers, flanges Possible damage from raceways. For bearings capable of bearing axial load, an axial load of not more than 30N should be applied to the outer ring of the bearing to ensure stable operation. The method of applying radial and axial loads is specified in 6.3.3. Note. The set value of the radial load is a composite value, and the actual value depends on the load angle used (see Figure 3). Table 1 Set values of bearing radial load Bearing outer diameter Single-row cylindrical roller bearingsDouble-row cylindrical roller bearings > ≤ Set value of bearing radial load min.max.min.max. mm NN 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 5 Measurement and evaluation methods 5.1 Measured physical quantities The physical quantity set during the measurement is the radial root mean square vibration velocity, vrms (μm/s). 5.2 Frequency domain The vibration speed should be analyzed in one or more frequency bands, within the set frequency range specified in Table 2. If a specific frequency range is extremely important for the good operation of the bearing, other parameters can also be used after consultation between the manufacturer and the user. Frequency range, see Table 3 for examples of commonly used specific frequency ranges. The rotation frequency should be changed according to the proportional change of the filter frequency, the acceptable limit and the minimum measurement time. See Table 3 for an example. Narrow-band spectral analysis of vibration signals is available as a complementary option. Table 2 Set frequency range Rotating frequency Low frequency band (L) Mid frequency band (M) High frequency band (H) Nominal min.max. Nominal frequency band flow fupp flow fupp flow fupp min-1 Hz Hz Hz 900 882 909 25 150 150 900 900 5000 1800 1764 1818 50 300 300 1800 1800 10000 Table 3 Example of frequency range without set rotation frequency Rotating frequency Low frequency band (L) Middle frequency band (M) a High frequency band (H) a Nominal min.max. Nominal frequency band flow fupp flow fupp flow fupp min-1 Hz Hz Hz 3600 3528 3636 100 600 600 3600 3600.20000 700a 686 707 20 120 120 700 700 4000 a When the rotation frequency is 700min-1, the cut-off frequency is rounded (the relationship between the rotation frequency and the rotation frequency is not strictly followed). 5.3 Measurement of pulses and sharp pulses Surface defects and/or contamination in the tested bearings often cause pulses or sharp pulses of the time domain velocity signal. Detection of sharp pulses is a complementary option. Different assessment methods can be used. 5.4 Test Single-row and double-row cylindrical roller bearings should be tested with a radial load in the radial direction of the stationary ring (vertical to the axis of the inner ring), An axial load should be applied to ensure stable bearing operation. If an axial load is used, an axial load shall be applied from one side of the stationary ferrule. When testing double-row cylindrical roller bearings, if the structure permits, the axial load should be applied to the other side of the stationary ring to repeat the test. When there are two inner or outer rings, they should be clamped to ensure repeatability. When used for diagnostic analysis, multi-point measurements should be made at different angular positions of the bearing stationary ferrule relative to the sensor. For acceptable bearings, the maximum vibration indication of the corresponding frequency band should be within the limit value negotiated by the manufacturer and the user. The test duration is as specified in 6.5 of ISO 15242-1..2015. 6 Measurement conditions 6.1 Bearing measurement conditions 6.1.1 Pre-lubricated bearings Pre-lubricated (grease-lubricated, oil-lubricated or solid-lubricated) bearings, including sealed bearings and dust-proof bearings, should be tested under delivery. 6.1.2 Non-prelubricated bearings Because pollutants affect vibration levels, bearings should be cleaned effectively, taking care not to introduce pollutants or other sources of vibration. Note. Some rust inhibitors can meet the lubrication requirements of vibration test. It is not necessary to remove the rust inhibitor at this time. Non-prelubricated bearings should use kinematic viscosity between 10mm2/s ~ 100mm2/s and be finely filtered according to bearing type and size Lubricating oil. During the lubrication process, a trial operation should be performed to make the lubricant in the bearing evenly distributed. 6.2 Test environmental conditions Bearings should be tested in an environment that does not affect vibration. 6.3 Test device conditions 6.3.1 Stiffness of spindle/mandrel The structure used to support and drive the main shaft (including the mandrel) of the bearing can not only transmit rotary motion, but also serve as rigidity of the rotation axis. Sexual frame of reference. In the frequency band used, the transmission of vibration between the spindle/mandrel and the bearing can be ignored compared to the measured vibration speed. Negligible. 6.3.2 Loading mechanism The structure of the loading mechanism used to apply a load to the bearing's measured ferrule should make the ferrule in all directions-radial, axial, angular or flex The vibration of the curved type (depending on the bearing type) is essentially free, and can guarantee the normal operation of the bearing. 6.3.3 Bearing load and alignment accuracy The constant applied radial load applied to the bearing's stationary ring and the recommended axial load are specified in 4.2. The deformation of the bearing ring due to the contact of various mechanical parts is negligible compared with the geometric accuracy of the tested bearing itself. The position of the applied radial load should be applied to the middle of the outer ring width, and the direction coincides with the center line perpendicular to the axis of rotation of the main shaft. The deviation of the direction should be within the range specified in Figure 1 and Table 4.The measurement method is as specified in Appendix A. The position and direction of the applied axial load coincides with the axis of rotation of the main shaft, and the deviation should be within the range specified in Figure 2 and Table 5.measuring The method is as specified in Appendix B. a In any direction. Figure 1 Deviation of the loading direction and axial position of radial load Table 4 Deviation values of radial load loading direction and axial position Bearing outer ring width > ≤ Axial deviation from the middle of the outer ring width of the bearing H2 max. Angle deviation of the center line perpendicular to the main axis β2 max. mm mm (°) 10 20 0.3 20 40 0.5 40 70 1.0 a Axis with applied axial load. b Rotation axis of bearing inner ring. c Radial and angular deviations of the axial load axis from the rotation axis of the bearing inner ring (see Table 5). Figure 2 Deviation of the axial load axis from the rotation axis of the bearing inner ring Table 5 Deviation of the axial load axis and the rotation axis of the bearing inner ring Bearing outer diameter > ≤ Radial deviation from the rotation axis of the bearing inner ring max. Angle deviation from the rotation axis of the bearing inner ring max. mm mm (°) 30 50 0.4 50 70 0.6 70 100 0.8 100 140 1.6 140 170 2.0 170.200 2.5 0.5 6.3.4 Sensor position and measurement direction The positioning of the sensors is as follows. Set axial position. on the outer surface of the stationary ferrule and on the plane corresponding to the middle of the contact between the loaded stationary ferrule raceway and the roller (for For the stationary outer ring, see Figure 3). The manufacturer shall provide this data. Another axial position. on the outer surface of the stationary ferrule and on a plane corresponding to the middle of the stationary ferrule (for a stationary outer ring, see Figure 4). Set angular position. on the outer surface of the stationary ferrule and on a plane corresponding to the direction of the resultant radial load (for a stationary outer ring, (See Figure 3). The radial load loading method shall ensure that the radial load is synthesized to meet the radial load specified in Table 1. Explanation. a --- sensor position and direction; b --- radial load applied; c --- direction of axial load (if any); d --- the resultant force of the applied radial load (see Table 1). Note. For other types of flange structure, the test can be carried out according to the method agreed between the manufacturer and the user. Figure 3 Vibration measurement --- the position set by the sensor Explanation. a --- sensor position and direction; b --- radial load applied; c --- direction of axial load (if any). Figure 4 Vibration measurement --- the location of another sensor measurement point After the position of the sensor is determined, the maximum allowable axial and angular position deviations are as follows. Axial position. --- When outer diameter D≤70mm. ± 0.5mm. --- When outer diameter D > 70mm. ± 1.0mm. Corner position. --- All outer diameters. ± 5 °. Direction. perpendicular to the axis of rotation (see Figure 5). The deviation from the radial centerline in any direction should not exceed 5 °. a In any direction. Figure 5 Deviation from radial centerline 6.3.5 Mandrel The outer diameter tolerance of the cylindrical surface of the mandrel used to install the bearing inner ring shall meet the requirements of class f5 in ISO 286-2 The geometric error ensures that the mandrel is inserted into the bearing bore with a slip fit. The radial and axial runout should be controlled so as not to affect the test. Runout shall be performed using the device given in Appendix C of ISO 15242-1..2015. Line measurement. Appendix A (Normative appendix) Measurement of centering accuracy with applied radial load The alignment accuracy of the radial loading mechanism is measured using a dial indicator.The dial indicator can be moved a certain radial distance.The dial indicator is installed. On a precision bracket connected to the spindle and perpendicular to the spindle axis (see Figure A.1). The dial indicator is adjusted to zero in the first position. In order to be able to compare with the limit deviation value specified in Table 4, the indication deviation measured by the dial indicator should be recalculated into an angle. measuring This should be done in two positions on the loading mechanism. Explanation. 1 --- dial indicator at position 1; 2 --- dial indicator at position 2; 3--precision piston connected to the mandrel 6; 4 --- Precision bracket vertically mounted on precision piston 3; 5 --- spindle; 6 --- mandrel; 7 --- Radial loading mechanism. Figure A.1 Measurement of centering accuracy with applied radial load Appendix B (Normative appendix) Measurement of centering accuracy of applied axial load The offset of the loading mechanism is measured using two dial gauges mounted on the bracket of the spindle (see Figure B.1). The axial distance is a certain distance. The main shaft should rotate slowly, and the dial gauge can measure the radial runout of the loading piston. The radial runout measured by the two dial gauges should be corrected according to the axial position of the test bearing so that it can meet the limits specified in Table 5. The deviation values are compared. Explanation. 1, 2 --- dial indicator; 3 --- mounting bracket for dial indicator; 4 --- mandrel; 5 --- loading mechanism. Figure B.1 Measurement of centering accuracy with applied axial load ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 24610.4-2019 be delivered?Answer: The full copy PDF of English version of GB/T 24610.4-2019 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 24610.4-2019_English with my colleagues?Answer: Yes. 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