JB/T 8075-1996 Rolling bearing steel ball vibration measuring instrument JB/T8075-1996 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T8075-96
Rolling Bearing
Steel Ball Vibration Measuring Instrument
Published on September 3, 1996
Ministry of Machinery Industry of the People's Republic of Chinawww.bzxz.net
[997-(17-01 Implementation
JH/8075-96
This standard is formulated for the first time.
This standard is formulated based on the current steel ball vibration measuring instrument. This standard is proposed by the National Hydraulic Bearing Standardization Lingguang Committee and is developed by the Jiangyang Bearing Research Institute of the Ministry of Machinery Industry. The drafting units of this standard are: Luoyang Bearing Research Institute, Dalian Axis Instrument Factory and Shanghai Bearing Technology Research Institute. The main drafters of this standard are: Zhu Jingbi, Liu Zhifeng, Wang Jiajing. 1 Scope
Machinery Industry Standards of the People's Republic of China
Rolling Bearings
Steel Ball Vibration Measuring Instrument
JB/T 887596
This standard defines the technical requirements and inspection methods for the copper ball jigsaw edge measuring instrument (hereinafter referred to as the instrument), which is applicable to the steel balls with the size range of D,3-15mm and D,12-30mm. This standard is applicable to the inspection and acceptance of the instrument by the instrument manufacturer and the user. 2 Referenced standards
The provisions contained in the following standards constitute the text of this standard by reference in this standard. At the time of publication of this standard, the All versions are valid. All standards will be revised. Parties using this standard should discuss the possibility of using the latest version of the following standards. J807-9 General Technical Specifications for Dynamic Bearing Measuring Instruments 3 Symbols
: Ball Diameter
g: 9.81ms
4 Working Principle of the Instrument
Receiver Measuring Principle As shown in the figure, place the steel ball on the pressure block and the corresponding center, steel ball and center shaft to complete the assembly. The sensor rod is placed at the highest point of the steel ball with a specified pressure. When the saw ball rotates around the axis through the center of the ball, the radial speed at the vertical point is the steel ball vibration speed. The obtained ball vibration speed signal is converted into corresponding electrical signal, which is processed by the preamplifier and the output receiver, and the display indicates the steel ball data. Meter
E source block
Approved by the Ministry of Machinery and Equipment Industry on 1006-09-03
European Instrument
Measurement Principle
Dun Dalin
Quick Electric Industry
Wai Ying Electric Appliance
Wei Shi Electric Appliance
Implementation on 1997-67-01
Technical Requirements
5.1 Sensor
Use piezoelectric accelerometer,
JB/T 807596
s.1.1 Voltage desensitization
The sensitivity of the accelerometer is in the range of 8 to 13mV/mg-, and its sensitivity change should not be greater than 2% within one year. 5.1.2 Accelerometer output error is less than 1ds when measuring a certain acceleration value within the range of 50Hz~10kt.1.3 Amplitude tolerance: Within the working range of the sensor, at any fixed frequency, the relative output error of the sensor shall not exceed 5%. 5.1. Mechanical device for installing accelerometer: 1-5 (or in other words, it needs to be combined): 2-transmitter rod: 3-elastic hook: a flat plate (or ground material): an accelerometer, 6-support frame: a grid diagram Mechanical device for installing accelerometer: 5.1 .4.1 The machine for installing the accelerometer is as shown in Figure 2. The full frequency of the system is greater than 100CHz.5.1.4.2 The probe diameter of the accelerometer is 0.6mm, and the pressure at the three measuring points of the probe and the sphere is within the range of U.4J~~.55K.
S.2 Frequency response characteristics of the whole machine
Solution: 170~100H* at a speed of 81Cr/m, 12~29°: 420/aur: at a speed of 46.C~00112, 57-114°, the characteristic curve is shown in Figure 3. Note:
JH/T 8075- 96
1 is the upper limit of the leakage device, and the lower limit of the device is the lower limit of the vehicle. 2. The lower limit of the upper limit of 5 yuan is 20%. The upper limit of the upper limit is 30083
5.3 Technical conditions of the instrument
5.3.1 The measuring range of the instrument is 34~801
53.2 The measurement accuracy is C.252
5.3.3 The stability of the device is only ±0.2B
5.3.4 The power supply voltage is 380/220V, the frequency is 50H. At the same time, the instrument group is firmly connected to the ground wire. 5.4 Mechanical installation of the wine pressure system
5.4.1 The vibration of the driving device should not exceed 25d5.4.2 The main axis brick path
| Low ball size in the range of D,3~15mm domestic use 830r/u:=1:r/min, pin ball size in the range of 1>12~30mm domestic use 4gor/uuin±1Gr/min.
5.4.3 After the spindle and the main and auxiliary are combined, the radial jump effect and axial single action should not be greater than (.5, ss current quantity bad language
5.5.1 The ambient temperature should be 15~44)C. The ground vibration should be less than 6C4B, and the ambient noise isolation pressure level should be less than 80d5.5.2 The original place of the measuring plate should be kept clean, far away from various sources, and free from electrical interference. s.6 Other
5.(, 1 normal increase [, special compliance meter must be recognized and calibrated once a year. 6.6.2 The village of the receiver and other parts The quality and technical requirements shall comply with the provisions of the design drawings. 5.6.3 The external quality of the instrument and the quality of the attenuation matching shall comply with the provisions of JB/T5307. 6 Inspection methods 6.1 Inspection environment The ambient temperature is 2) C, and the relative humidity should not be greater than 80%. 6.2 The instrument should be calibrated before use according to JB/T8015-96. The instrument should be connected to the calibrated steel ball perturbation measuring instrument according to Figure 4. The standard sensor should be calibrated to 76d, 3~15mm), 75dB (, 13~30mm) at a connection speed of 0.1g. The measuring belt should be sensitive to the blue board. The signal exchange is light and the work frequency is relatively high. 6.3 The frequency response of the sensor is selected according to the equipment used to measure the steel ball vibration. The positive bag is composed of a standard load and a standard velocimeter to form a closed-loop automatic scanning system, so that the sensed load is subjected to a certain acceleration in the process of automatic bearing, and the change of the sensitivity of the velocity sensor within the range of 5C-10kIz is recorded by a recorder. 6.4 The frequency response of the machine is the same as that of the sensor and the connection line. 6.5 The basic vibration of the drive device is automatically connected to the measuring disk after the device is powered on, without installing the ball. The disk is directly attenuated to the lowest gear. The value displayed is the basic output perturbation value of the positioner.
6.6 Speed
The main shaft speed shall be calibrated with a digital counter or other auxiliary tachometer with an accuracy of 5%. 6.7 Others
Under normal circumstances, the main shaft should be cleaned once a year and the instrument should be calibrated once a year to ensure that the instrument meets the requirements of the technical specifications.
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