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Rolling bearings -- Measuring methods and specifications for vibration (acceleration)
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Basic data | Standard ID | GB/T 32333-2015 (GB/T32333-2015) | | Description (Translated English) | Rolling bearings -- Measuring methods and specifications for vibration (acceleration) | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J11 | | Classification of International Standard | 21.100.20 | | Word Count Estimation | 15,111 | | Date of Issue | 2015-12-31 | | Date of Implementation | 2016-04-01 | | Regulation (derived from) | State Standard Announcement 2015 No.43 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 32333-2015: Rolling bearings -- Measuring methods and specifications for vibration (acceleration)
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Rolling bearings - Measuring methods and specifications for vibration (acceleration)
ICS 21.100.20
J11
National Standards of People's Republic of China
Rolling bearing vibration (acceleration) measurement method and
Technical conditions
Released on.2015-12-31
2016-04-01 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Issued by the National Standardization Administration of China
Rolling bearing vibration (acceleration) measurement method and
Technical conditions
1 Scope
This standard specifies the vibration (acceleration) measurement method of rolling bearings (hereinafter referred to as bearings) and the vibration (acceleration) technology of deep groove ball bearings.
Technical conditions.
The measurement methods specified in this standard are applicable to radial ball bearings with cylindrical bores and cylindrical outer surfaces (single row and double row deep groove ball bearings, adjustable
Center ball bearings and single row and double row angular contact ball bearings), spherical roller bearings, single row and double row tapered roller bearings and single row and double row round
Cylindrical roller bearing vibration (acceleration) measurement.
See Appendix A for the technical conditions of vibration (acceleration) of deep groove ball bearings.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB 443 L-AN oil for total loss system
GB/T 2828.1 Sampling Inspection Procedures by Attributes Part 1.Batch Inspection Sampling Plan Retrieved by Acceptance Quality Limit (AQL)
GB/T 24610.1-2009 Rolling Bearing Vibration Measurement Method Part 1.Basics
GB/T 24610.2-2009 Rolling bearing vibration measurement method Part 2.Centripetal ball with cylindrical hole and cylindrical outer surface
Bearing
GB/T 24610.3-2009 Rolling bearing vibration measurement method Part 3.Spherical roller with cylindrical bore and cylindrical outer surface
Sub-bearings and tapered roller bearings
GB/T 24610.4-2009 Rolling bearing vibration measurement method Part 4.Cylindrical roller with cylindrical bore and cylindrical outer surface
Sub-bearing
JB/T 2974 Supplementary Regulations for Rolling Bearing Code Method
SH0004 solvent oil for rubber industry
3 Terms and definitions
The following terms and definitions apply to this document.
4 Requirements for measuring instruments
4.1 Mechanical device
The mechanical device includes a driving device that makes the main shaft rotate at a certain speed, a spindle with bearings, and an axial load and radial load loading mechanism
And acceleration sensor system, etc.
4.1.1 Drive
于10dB. The measurement method is in accordance with Appendix B.
4.1.1.2 According to the different structural types and sizes of the bearing, the set value of the spindle speed is shown in Table 1.
After negotiation between the manufacturer and the user, other speeds and deviations can also be used. Refer to GB/T 24610.2-2009, GB/T 24610.3-
2009 and the provisions of 4.1 in GB/T 24610.4-2009.
4.1.2 Mandrel
4.1.2.1 The hardness of the mandrel is not less than 58HRC. Refer to Table 2 for the tolerance of the outer diameter of the mating part of the spindle and the inner hole of the bearing.
4.1.2.2 After the mandrel and the main shaft are combined, the radial and axial circular runout shall not be greater than 5μm. The measurement method is in accordance with Appendix C.
4.1.3 Axial load and radial load loading mechanism
4.1.3.1 In addition to being able to apply a large enough load to the outer ring of the bearing to limit the rotation of the outer ring, the loading mechanism should also make the outer ring in all directions---
Radial, axial, angular or flexural (depending on the bearing type) vibration is essentially free, that is, the outer ring vibration is not affected by the loading mechanism
The disturbance is only caused by the operation of the bearing.
4.1.3.2 The size of the axial load and radial load imposed on the outer ring of the bearing is specified in 6.2.
4.1.3.3 The direction of the bearing axial load should coincide with the axis of rotation of the bearing inner ring, and its deviation should not exceed GB/T 24610.2-2009 and
The range specified in Figure 1 and Table 3 in GB/T 24610.3-2009.The measurement method is in accordance with GB/T 24610.2-2009 and
The provisions of Appendix A in GB/T 24610.3-2009.
4.1.3.4 The radial load of the bearing should be applied to the middle of the width of the outer ring, and the direction should be coincident with the center line perpendicular to the axis of rotation of the main shaft.
It should not exceed the range specified in Figure 1 and Table 3 in GB/T 24610.4-2009.The measurement method is in accordance with GB/T 24610.4-2009 attached
Record A’s regulations.
4.1.3.5 For single-row and double-row cylindrical roller bearings that can withstand axial loads, the loading position and direction of the axial load should be the same as those in the bearing.
The axis of rotation of the ring is consistent, and the deviation should not exceed the range specified in Figure 2 and Table 4 in GB/T 24610.4-2009.
4.1.4 Acceleration sensor system
4.1.4.1 The structure of the acceleration sensor system is shown in Figure 1.The total mass of the vibration transmission rod and the acceleration sensor should be 50g±5g, and the vibration transmission
The diameter of the probe at the front end of the rod should be within the range of 3.5mm≤ϕ≤4.5mm.
4.1.4.2 The maximum allowable axial position deviation and angular deviation of the vibration transmission rod of the acceleration sensor system and the radial axis are in accordance with GB/T 24610.2-
2009, GB/T 24610.3-2009 and GB/T 24610.4-2009 in the range specified in 6.3.4.
4.1.4.3 The contact load between the vibration transmission rod of the acceleration sensor system and the outer cylindrical surface of the bearing. the contact load of the bearing with an outer diameter D≤25mm
It is 1.0N~5.0N; the contact load of bearings with outer diameter D >25mm is 5.0N~10.0N.
4.2 Electronic measuring instruments
4.2.1 When using a piezoelectric acceleration sensor, the resonance frequency of the piezoelectric acceleration sensor used should be greater than 20kHz.
4.2.2 Within the measured bearing vibration acceleration level range, the amplitude linear error of the acceleration sensor should be less than 5%.
4.2.3 The installation resonance frequency of the acceleration sensor system should be greater than.2000 Hz.
4.2.4 In the frequency range of 50Hz~10000Hz, the following characteristics of the acceleration sensor system should be good, and the amplitude linearity error should be small
Less than 5%.
4.2.5 The dynamic range of electronic measuring instruments should not be less than 60dB.
4.2.6 In the dynamic range of the electronic measuring instrument, the noise floor should not be greater than 5dB.
4.2.7 Within the measurement range of the electronic measuring instrument, the amplitude linearity error of the instrument should be less than 5%.
4.2.8 The passband of the electronic measuring instrument is 50Hz~10000Hz. For different types of bearings, low frequency (L) and intermediate frequency can be used
(M) and high frequency (H) three frequency bands are measured, and the frequency range is according to GB/T 24610.2-2009, GB/T 24610.3-2009 and
GB/T 24610.4-2009 stipulates 5.2.You can also choose to use spectrum analysis to analyze the vibration signal.
4.2.9 In the frequency range of 50Hz~10000Hz, the linear error of the integrated amplitude of the electronic measuring instrument and the acceleration sensor system should be small
Less than 10%.
4.2.10 The shift error of the electronic measuring instrument should not be greater than ±0.3dB, and the indication error should not be greater than 0.5dB.
4.3 Calibration and qualification evaluation of the measurement system
4.3.1 The calibration and qualification evaluation of the measurement system shall be in accordance with the provisions of Chapter 8 of GB/T 24610.1-2009.
4.3.2 The measurement system should be calibrated at least once a year.
5 Measurement conditions
5.1 Cleaning of bearings
5.1.1 Pre-lubricated (grease lubrication, oil lubrication or solid lubrication) bearings, including sealed bearings and dust-proof bearings, should be tested in the supply state; non-
Pre-lubricated bearings should be effectively cleaned in a suitable cleaning agent. If there is any objection to the test result, use NY-120 solvent oil to clean the bearing
The measured value shall prevail. NY-120 mineral spirits should be filtered through a filter with a pore size not greater than 0.45μm, and other technical requirements should be in accordance with SH0004
Regulation.
5.1.2 If the anti-rust agent of the bearing meets the conditions of vibration measurement and lubrication, it is not necessary to remove the anti-rust agent at this time, and no pollutants should be introduced during cleaning.
Or other vibration sources, the working surface of the bearing after cleaning should be free of dust, foreign matter and flexible rotation.
5.2 Lubrication of bearings
Before measuring the bearing, use a certain amount of clean lubricant to lubricate the bearing according to the type and size of the bearing. To be cleaned
After the bearing is completely dry, fully lubricate the working surface with the oil of the total loss system, the nominal viscosity of the oil is 10mm2/s~100mm2/s, filter
The accuracy should not be less than 0.8μm. During the lubrication process, a trial run should be carried out to make the lubricant in the bearing evenly distributed. The lubrication method used should
Ensure that there is no dust, impurities and other foreign matter contaminating the bearing. The recommended lubricant grade for the measurement of ambient temperature is L-AN15, and its technical requirements
Please follow the provisions of GB 443.
5.3 Test environment
5.3.1 The test site should be far away from the electric field, magnetic field and vibration source to prevent external interference from affecting the measurement results.
5.3.2 The test environment should be kept clean, and no foreign matter such as dust or impurities should enter the tested bearing.
5.3.3 The ambient temperature of the test site should be 10℃~35℃, and the relative humidity should not be greater than 70%.
6 Measurement and evaluation methods
6.1 Measured physical quantity
6.1.1 The physical quantity set during bearing vibration (acceleration) measurement is vibration acceleration; the physical quantity set during vibration (acceleration) peak measurement
Is the maximum vibration acceleration.
6.1.2 The unit of bearing vibration acceleration level, basic vibration acceleration level and bearing vibration acceleration level peak value is decibel (dB), according to formula (1)
calculate.
L=20lg
a0
(1)
Where.
L --- Bearing vibration acceleration level, in decibels (dB);
a --- Root mean square value of vibration acceleration within a certain frequency range or peak value of bearing vibration acceleration, in meters per second square second
(m/s2);
a0---reference acceleration, its value is 9.81×10-3m/s2.
6.2 Bearing axial load and radial load
6.2.1 When measuring the vibration of radial ball bearings (single row and double row deep groove ball bearings, self-aligning ball bearings and single row and double row angular contact ball bearings),
See Table 3 for the set value of the axial load applied to it.
6.2.2 When measuring the vibration of spherical roller bearings, single-row and double-row tapered roller bearings, the set values of the axial load applied to them are shown in Table 4.
Appendix A
(Normative appendix)
Technical conditions for vibration (acceleration) of deep groove ball bearings
A.1 Scope
This appendix specifies the vibration (acceleration) technology of 0, 2, and 3 diameter series deep groove ball bearings with a nominal outer diameter greater than 10mm~200mm
condition.
The Z group specified in this appendix is the basic requirement for general bearing vibration (acceleration), Z1, Z2, Z3 and Z4 groups and ZF3, ZF4 groups are suitable
It is used for bearings with higher requirements for vibration (acceleration) level. Among them, ZF3 and ZF4 groups are only suitable for nominal outer diameters greater than 10mm~
100mm 0, 2, and 3 diameter series bearings.
A.2 Group code
This appendix uses the code names of JB/T 2974 and the following codes.
ZF3.The vibration acceleration level reaches the Z3 group, and the difference between the peak vibration acceleration level and the vibration acceleration level is not more than 15dB;
ZF4.The vibration acceleration level reaches the Z4 group, and the difference between the peak vibration acceleration level and the vibration acceleration level is not more than 15dB.
A.3 Technical requirements
For 0, 2, and 3 diameter series bearings with a nominal outer diameter greater than 10mm~200mm, the vibration acceleration level limits of a single bearing in different groups
Should meet the requirements of Table A.1.
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