Some standard content:
ICS 21.100.20
J11
JB
Machinery Industry Standard of the People's Republic of China
JB/T5313-2001
Rolling bearings
Vibration ( Velocity) measurement methods
Rolling bearingMeasuring methods forvibration(velocity)
Released on 2001-05-23
China Machinery Industry Federation
Released
2001-10 -01 Implementation
JB/T5313-2001
Foreword
This standard is a revision of JB/T: 5313-1991 "Rolling Bearing Perturbation (Speed) Measurement Method". Compared with JB/T5313-1991, the main changes in this standard are as follows: - rolling bearings of d-3~9mm have been added to the scope of application; a pair of definitions of "bearing vibration value" have been supplemented; a pair of test conditions such as rotational speed , spindles, etc. have tightened requirements; 1. Added regular verification requirements for measuring sensors and electronic egg detection systems; 1. Supplemented the installation methods for testing various types of bearings. This standard replaces JB/T5313-1991 from the date of implementation. This standard is proposed and coordinated by the National Rolling Bearing Standardization Technical Committee. This standard was drafted by: Hangzhou Bearing Test and Research Center. The main drafters of this standard: Chen Fanghua, Shen Yuntong, Kang Naizheng, Chen Jinyuan, Pan Jikang. This standard was first released in June 1991, and this is the first revision. 1 Scope
Machinery Industry Standard of the People's Republic of China
Rolling bearings
Vibration (velocity) measurement methods
RollingbearingMeasuring methods for vibration (velocity)
JB/T5313- 2001 | | tt | Vibration (velocity) measurement method for NU, NJ and NF types). This standard is suitable for laboratories, manufacturers and users to detect the vibration (speed) of the above-mentioned rolling bearings. 2 Referenced standards
The provisions contained in the following standards constitute provisions of this standard by being quoted in this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties using this standard should explore the possibility of using the latest version of the standard listed below. GB/T307.1—1994
Rolling bearings and radial bearing tolerances
GB/T 6930—1986
3 Terms and definitions
3.1 Bearing vibration
Rolling bearing vocabulary
During the rotation of the bearing, except for the inherent movement between the bearing parts and the movement required by the function, all other movements with periodic changing characteristics are called bearing vibration. The bearing vibration measured in this standard refers to the center of the raceway when the inner end surface of the bearing is close to the shoulder of the spindle and rotates at a certain constant speed without the outer ring rotating and bearing a certain radial or axial load. The radial vibration speed of the bearing outer ring where the cross section intersects the outer cylindrical surface (highest point).
3.2 Bearing vibration (speed) value
Under a certain rotation speed and test load, select three points roughly equidistant in the circumferential direction of the outer cylindrical surface of the bearing outer ring for testing, including low, medium and high. The arithmetic mean value of the vibration speed in the frequency band is the vibration (speed) value of the bearing in the corresponding frequency band. If the bearing needs to be tested on both front and back sides, the higher value of each frequency band (three-point average) will be the vibration (speed) value of the bearing in that frequency band. Physical quantity and unit
The vibration physical quantity of the bearing under test is the radial vibration speed of the bearing outer ring, and the unit is μm/s. 5 Evaluation of bearing vibration (speed)
5.1 Rate range
In the frequency range of 50~10000Hz, the three measurement frequency bands of bearing vibration (speed) are as specified in Table 1. China Machinery Industry Federation approved the implementation on 2001-10-01 on 2001-05-23
1
frequency band
frequency range
time-simplified average method||tt| |5.2
Low frequency band
50~300Www.bzxZ.net
JB/T5313—2001
Table 1
Middle frequency band
300-1800| |tt||High frequency band
1800~10000
Hz
The measurement time of the vibration speed signal of each measuring point should be no less than 0.5s, and the reading will be taken after the pointer stabilizes. If the signal fluctuates, the middle value of the fluctuation range is taken.
6
Test conditions
6.1 Mechanical device
6.1.1 Basic vibration
Start the drive spindle (the range switch of each frequency band is placed in the lowest gear) , press down the sensor probe so that it is under the same conditions as the test state. At this time, the indication values ??of each frequency band should comply with the requirements of Table 2. Table 2
Bearing nominal inner diameter
mm
exceeds
3+
12
60
1) including 3mm .
6:1.2 speed
to
12
60
120
50~300Hz
10||tt ||12
15
The detection value of each forehead band
max
300~1800Hz
7
10||tt| |15
During the test process of the bearing, the actual rotation speed n of the inner ring should comply with the requirements of Table 3. Table 3
Bearing nominal inner diameter
mm
Super
over
3r
60
1) including 3mm| |tt||6.1.3 spindle
to
60
120
μm/s
1800~10000Hz
4| |tt||5
7
r/min
actual rotation speed n
1764-1818
882~909
After the mandrel is combined with the driving spindle, the radial runout at the mating point between the mandrel and the inner ring of the bearing shall not be greater than 5 μm, and the circular runout of the shoulder end face of the mandrel shall not be greater than 10 μm.
The hardness of the mandrel is 61~64HRC. The tolerance of the fit between the spindle and the inner hole of the bearing should comply with the requirements in Table 4. 2
over
3
18
30
50
80
nominal spindle size||tt| |mm
! ) including 3mm
6.1.4 loading system
to
18
30
50
80
120| |tt||JB/T 5313—2001
Table 4
Upper deviation
-9
-12
14
17
23
Spindle tolerance
Lower deviation
15
-18
21
-25||tt ||-32
μm
A loading device that applies load to the outer ring of the bearing. In addition to transmitting a constant load, limiting the rotation of the outer ring and possible elastic recovery moment, it also serves as a link between the bearing and the mechanical device. The isolation system between the bearings makes the outer surface of the bearing basically in a free vibration state. 6.1.4.1 Axial load
During the test process, deep groove ball bearings, angular contact ball bearings and round dimension roller bearings should be subject to a certain combined axial load, and the load size should comply with the provisions of Table 5.
Table 5
Bearing nominal inner diameter
mm
Exceeds
34)
6
9||tt| |20
30
40
60
80
1) Including 3mm.
closure
6
9
20
30
40
60
80|| tt||120
deep groove ball bearings
20
30
40
80
120
180| |tt||225
axial load
angular contact ball bearing
44250
60
110
160||tt| |235
340
q>250
100
160
235
350
440||tt| |The coaxiality between the line of action of the axial load of the leather and the axis of the drive spindle shall not exceed 0.20mm and be within 2°, as shown in Figure 1.
Tapered roller bearings
60
110
160
235
340
N
Radial load
Cylindrical roller bearing
150
300
600
The angle between the axis of the drive spindle and the drive spindle is not large||tt| |6.1.4.2 Radial loading
JB/T5313—2001
Maximum quantity 0.20mm
a) Coaxiality limit
b) Tilt limit||tt| |Large quantity and quality solution angle 2
Synthetic industry grape
Main axis auxiliary center line
Synthetic recommended
Main axis axis center pancreas
Figure 1 synthetic axis Schematic diagram of the coaxiality and inclination limits of the radial load and the spindle axis. During the test, a certain synthetic radial load should be applied to the outer ring of the cylindrical roller bearing. Its size should comply with the provisions of Table 5. The contact area between the load pad and the outer ring of the bearing under test is shown in Figure 2. Facilitator
AP
Clear block
Flexible shape
Bearing under test
Teach P,-P,
P is the resultant force of P, The angle between the vertical lines should not be greater than 2°, and the distance from the center line of the drive spindle 4
should be less than 0.5mm.
6.1.5 Sensor seat
JB/T5313-2001
The sensor seat can move along the axis of the driving spindle and in the vertical direction respectively, and ensures that the sensor contacts the outer ring of the bearing under test. The angle between the line of action and the vertical line of the axis of the drive spindle is not greater than 2°, and the distance from the axis is less than 0.2mm. 6.2 Sensor
What the sensor senses is the rate of change of the radial vibration displacement of the bearing outer ring. 6.2.1 In the frequency range of 50~10000Hz, the sensor and the outer ring of the bearing under test should not be separated, and the contact load of the sensor on the outer ring of the bearing under test should be less than 0.7N.
6.2.2 The frequency response characteristics of the sensor system should be within the limits specified in Figure 3. 8000H
IPO
Maximum allowable
100
1000
Figure 3 Sensor frequency response characteristics
1000e
6.2. 3 In the range of 5~3000μm/s (rms), the maximum linear deviation of the sensor system amplitude should be less than 10%. 6.2.4 The sensor should be calibrated regularly. During the calibration period, the allowable change range of sensor sensitivity is ±5%. 6.3 Electronic measuring device
6.3.1 The electronic measuring device should have a frequency response range of 50~10000Hz and be divided into three 2.5 octave filters. The bandwidth of the filter should comply with the provisions of Table 1.
6.3.2 The filter characteristics of the electronic measuring device shall be within the range specified in Figure 4, with attenuation of all frequencies below 64% of the low cutoff frequency (none) or 160% above the high cutoff frequency (stone). less than 40dB. 30
50
EPO
0.646
JB/T5313—2001
1.2k
tt||Figure 4 Filter Characteristics
Larger volume customers
Recommended indicators
0.8
High reporting limit vehicles:
6.3.3 Electronic measuring device It should be calibrated regularly, and the allowable variation range of the calibration value within the calibration period is ±4%. 6.4 test environment
ap
1.6f.
EPot
6.4.! The bearing vibration test is conducted at room temperature. The test environment should be clean. Dust, impurities, etc. are not allowed to enter the bearing being tested, so as not to affect its vibration measurement value.
6.4.2 The test site shall not have strong vibration sources that affect the bearing perturbation measurements. 6.4.3 The test site shall not have strong electromagnetic fields that affect the performance of the sensor and the measured value of the bearing alarm. 6.5 Cleaning and lubrication of the bearings under test
Grease-injected bearings should be tested in the grease-filled state. The bearing must be cleaned. After the cleaning agent has completely evaporated, add clean N15 mechanical oil [kinematic viscosity (at 40°C) is 13.5~16.5mm*/s) to ensure that the working surfaces of all bearing parts are fully lubricated. When there is any doubt about the test results, the bearing should be cleaned first with NY-120 solvent gasoline or other solvents that will not cause any adverse effects on the bearing and its vibration test to remove all impurities such as oil stains in the bearing.
Testing methods and procedures
Install the bearing under test on the spindle so that the end face of the inner ring is close to the shaft shoulder. If it is a cylindrical roller bearing, the end faces of the inner and outer rings should be so that Stay in the same plane.
6
JB/T5313-2001
For deep groove ball bearings, the front and back sides should be tested separately. For angular contact ball bearings and tapered roller bearings, they are installed and tested in the direction in which they bear axial load. For NJ type cylindrical roller bearings, install the inner ring rib end face close to the shaft shoulder for testing. For NF type cylindrical roller bearings, install and test with the outer ring rib end facing outward. For N-type and NU-type cylindrical roller bearings, install and test with the datum surface facing the spindle shoulder. During the test, ensure that the sleeve does not produce axial displacement.
A certain axial or radial load is applied to the outer ring of the bearing, and the load size is as specified in Table 5. Start the spindle and read the steady-state vibration value according to the requirements of 5.2.The resultant force
P
Figure 2 radial load installation and schematic diagram
The resultant radial load applied is vertically downward, and the angle between its line of action and the vertical line of the center of the driving spindle No more than 2°, and the distance from the center line of the drive spindle 4
should be less than 0.5mm.
6.1.5 Sensor seat
JB/T5313-2001
The sensor seat can move along the axis of the driving spindle and in the vertical direction respectively, and ensures that the sensor contacts the outer ring of the bearing under test. The angle between the line of action and the vertical line of the axis of the drive spindle is not greater than 2°, and the distance from the axis is less than 0.2mm. 6.2 Sensor
What the sensor senses is the rate of change of the radial vibration displacement of the bearing outer ring. 6.2.1 In the frequency range of 50~10000Hz, the sensor and the outer ring of the bearing under test should not be separated, and the contact load of the sensor on the outer ring of the bearing under test should be less than 0.7N.
6.2.2 The frequency response characteristics of the sensor system should be within the limits specified in Figure 3. 8000H
IPO
Maximum allowable
100
1000
Figure 3 Sensor frequency response characteristics
1000e
6.2. 3 In the range of 5~3000μm/s (rms), the maximum linear deviation of the sensor system amplitude should be less than 10%. 6.2.4 The sensor should be calibrated regularly. During the calibration period, the allowable change range of sensor sensitivity is ±5%. 6.3 Electronic measuring device
6.3.1 The electronic measuring device should have a frequency response range of 50~10000Hz and be divided into three 2.5 octave filters. The bandwidth of the filter should comply with the provisions of Table 1.
6.3.2 The filter characteristics of the electronic measuring device shall be within the range specified in Figure 4, with attenuation of all frequencies below 64% of the low cutoff frequency (none) or 160% above the high cutoff frequency (stone). Less than 40dB. 30
50
EPO
0.646
JB/T5313—2001
1.2k
tt||Figure 4 Filter Characteristics
Larger volume customers
Recommended indicators
0.8
High reporting limit vehicles:
6.3.3 Electronic measuring device It should be calibrated regularly, and the allowable variation range of the calibration value within the calibration cycle is ±4%. 6.4 test environment
ap
1.6f.
EPot
6.4.! The bearing vibration test is conducted at room temperature. The test environment should be clean. Dust, impurities, etc. are not allowed to enter the bearing being tested, so as not to affect its vibration measurement value.
6.4.2 The test site shall not have strong vibration sources that affect the bearing perturbation measurements. 6.4.3 The test site shall not have strong electromagnetic fields that affect the performance of the sensor and the measured value of the bearing alarm. 6.5 Cleaning and lubrication of the bearings under test
Grease-injected bearings should be tested in the grease-filled state. The bearing must be cleaned. After the cleaning agent has completely evaporated, add clean N15 mechanical oil [kinematic viscosity (at 40°C) is 13.5~16.5mm*/s) to ensure that the working surfaces of all bearing parts are fully lubricated. When there is any doubt about the test results, the bearing should be cleaned first with NY-120 solvent gasoline or other solvents that will not cause any adverse effects on the bearing and its vibration test to remove all impurities such as oil stains in the bearing.
Testing methods and procedures
Install the bearing under test on the spindle so that the end face of the inner ring is close to the shaft shoulder. If it is a cylindrical roller bearing, the end faces of the inner and outer rings should be so that Stay in the same plane.
6
JB/T5313-2001
For deep groove ball bearings, the front and back sides should be tested separately. For angular contact ball bearings and tapered roller bearings, they are installed and tested in the direction in which they bear axial load. For NJ type cylindrical roller bearings, install the inner ring rib end face close to the shaft shoulder for testing. For NF type cylindrical roller bearings, install and test with the outer ring rib end facing outward. For N-type and NU-type cylindrical roller bearings, install and test with the datum surface facing the spindle shoulder. During the test, ensure that the sleeve does not produce axial displacement.
A certain axial or radial load is applied to the outer ring of the bearing, and the load size is as specified in Table 5. Start the spindle and read the steady-state vibration value according to the requirements of 5.2.The resultant force
P
Figure 2 radial load installation and schematic diagram
The resultant radial load applied is vertically downward, and the angle between its line of action and the vertical line at the center of the driving spindle No more than 2°, and the distance from the center line of the drive spindle 4
should be less than 0.5mm.
6.1.5 Sensor seat
JB/T5313-2001
The sensor seat can move along the axis of the driving spindle and in the vertical direction respectively, and ensures that the sensor contacts the outer ring of the bearing under test. The angle between the line of action and the vertical line of the drive spindle axis is not greater than 2°, and the distance from the axis center line is less than 0.2mm. 6.2 Sensor
What the sensor senses is the rate of change of the radial vibration displacement of the bearing outer ring. 6.2.1 In the frequency range of 50~10000Hz, the sensor and the outer ring of the bearing under test should not be separated, and the contact load of the sensor on the outer ring of the bearing under test should be less than 0.7N.
6.2.2 The frequency response characteristics of the sensor system should be within the limits specified in Figure 3. 8000H
IPO
Maximum allowable
100
1000
Figure 3 Sensor frequency response characteristics
1000e
6.2. 3 In the range of 5~3000μm/s (rms), the maximum linear deviation of the sensor system amplitude should be less than 10%. 6.2.4 The sensor should be calibrated regularly. During the calibration period, the allowable change range of sensor sensitivity is ±5%. 6.3 Electronic measuring device
6.3.1 The electronic measuring device should have a frequency response range of 50~10000Hz and be divided into three 2.5 octave filters. The bandwidth of the filter should comply with the provisions of Table 1.
6.3.2 The filter characteristics of the electronic measuring device shall be within the range specified in Figure 4, with attenuation of all frequencies below 64% of the low cutoff frequency (none) or 160% above the high cutoff frequency (stone). less than 40dB. 30
50
EPO
0.646
JB/T5313—2001
1.2k
tt||Figure 4 Filter Characteristics
Larger volume customers
Recommended indicators
0.8
High reporting limit vehicles:
6.3.3 Electronic measuring device It should be calibrated regularly, and the allowable variation range of the calibration value within the calibration period is ±4%. 6.4 test environment
ap
1.6f.
EPot
6.4.! The bearing vibration test is conducted at room temperature. The test environment should be clean. Dust, impurities, etc. are not allowed to enter the bearing being tested, so as not to affect its vibration measurement value.
6.4.2 The test site shall not have strong vibration sources that affect the bearing perturbation measurements. 6.4.3 The test site shall not have strong electromagnetic fields that affect the sensor performance and bearing alarm measurement values. 6.5 Cleaning and lubrication of the bearings under test
Grease-injected bearings should be tested in the grease-filled state. The bearing must be cleaned. After the cleaning agent has completely evaporated, add clean N15 mechanical oil [kinematic viscosity (at 40°C) is 13.5~16.5mm*/s) to ensure that the working surfaces of all bearing parts are fully lubricated. When there is any doubt about the test results, the bearing should be cleaned first with NY-120 solvent gasoline or other solvents that will not cause any adverse effects on the bearing and its vibration test to remove all impurities such as oil stains in the bearing.
Testing methods and procedures
Install the bearing under test on the spindle so that the end face of the inner ring is close to the shaft shoulder. If it is a cylindrical roller bearing, the end faces of the inner and outer rings should be so that Stay in the same plane.
6
JB/T5313-2001
For deep groove ball bearings, the front and back sides should be tested separately. For angular contact ball bearings and tapered roller bearings, they are installed and tested in the direction in which they bear axial load. For NJ type cylindrical roller bearings, install the inner ring rib end face close to the shaft shoulder for testing. For NF type cylindrical roller bearings, install and test with the outer ring rib end facing outward. For N-type and NU-type cylindrical roller bearings, install and test with the datum surface facing the spindle shoulder. During the test, ensure that the sleeve does not produce axial displacement.
A certain axial or radial load is applied to the outer ring of the bearing, and the load size is as specified in Table 5. Start the spindle and read the steady-state vibration value according to the requirements of 5.2.
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