GB/T 4439-1984 Industrial automation instrumentation working conditions vibration

GB/T 4439-1984 Industrial Automation Instrumentation Working Conditions Vibration GB/T4439-1984 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
Industrial process measurement and ontrol instrument operating conditions-Vibration UDC 681.2:621
-503:534
GB 4439, -84bzxZ.net
This standard specifies the environmental movement conditions (hereinafter referred to as vibration conditions) to which industrial automation instruments (hereinafter referred to as instruments) are subjected during operation, after installation but not during operation, and during storage. This standard does not apply to instruments during transportation and storage or installed on moving objects. The environmental vibration to which the instrument is subjected may be sinusoidal or random. This standard does not consider random vibration for the time being. The vibration conditions in the product standards of various instruments should be selected from the levels specified in this standard. Examples of selection of severe levels are shown in Appendix A (reference).
When the parameter value exceeds the range specified in this standard, the vibration condition belongs to the special vibration condition: at this time, the vibration condition in the product standard is determined by consultation between the relevant parties.
1 Terms and definitions
This standard adopts the terms and definitions specified in the following standards: a. GB2422-81 "Terms and Terms of Basic Environmental Test Procedures for Electrical and Electronic Products" b. GB2298--81 "Terms and Terms of Mechanical Vibration and Shock". 2 Combinations and representations of vibration conditions
The sinusoidal vibration conditions in the locations where various instruments are located are composed of two parts: the severity level of vibration and the time level of vibration. This standard uses the amplitude-frequency curve of vibration to represent the various severity levels of vibration conditions. The amplitude-frequency curve is formed by connecting the constant displacement amplitude line on the frequency domain below the crossover frequency and the constant acceleration amplitude line on the frequency domain above the crossover frequency. The severity level of vibration is related to the following parameters: a, vibration frequency f, unit price Hz,
b, displacement amplitude Fs, unit mm
c, acceleration amplitude Fa, unit m/s2.
The relationship between parameters is as follows:
Fs=250F
The duration of vibration is expressed as a percentage of the duration of vibration. The duration of vibration refers to the percentage of the total duration of vibration within a specified time.
3 Severity of vibration
3.1 Low frequency vibration (VL)
Table 1 specifies the limit values ​​of each level of low frequency vibration in the range of 2 to 150 Hz. Figure 1 shows the corresponding amplitude-frequency curve. Issued by the National Bureau of Standards on May 30, 1984
Implemented on April 1, 1985
GB4439-84
Displacement annoyance value below 9 Hz
Acceleration amplitude above 89H2
3.2 High-frequency vibration (VH,)
Table 2 specifies the limit values ​​of each level of high-frequency vibration within the range of 10 to 10000 Hz. Figure 2 shows the corresponding amplitude-frequency curve. Table 2
Displacement amplitude below 57~62Hz
Acceleration amplitude above 57~62Hz
10m/s*
104n/s2
GB 4439--:4
Low-frequency vibration classification diagram
30 m/5
20m/sz
10mzs2
High-frequency vibration classification diagram
20m/**
10m/sz
Vibration time level (T)
GB 443984
The percentage of moving duration for low-frequency vibration and high-frequency vibration levels is selected from the values ​​listed in Table 3. Table 3
Percentage of alarm duration
GB443984
Appendix A
Selection of vibration severity level
(reference)
The vibration severity level of the combined vibration conditions in the product standards of various instruments can be selected according to the installation category of the instrument with reference to the table below. Note: "Six" in the figure indicates that this level can be used for this equipment category, 2. The meter installed on the glass frame of the on-site control benefit also includes the meter installed on the main pipeline through the installation structure and directly installed on the mechanical equipment (steam turbine, generator, motor, internal combustion engine electric stop) connected to the meter on the main equipment of the equipment. Additional instructions: GB4439-84 This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China. This standard is under the jurisdiction of Shanghai Industrial Automation Instrumentation Research Institute. This standard was drafted by Shanghai Industrial Automation Instrumentation Research Institute. The main drafter of this standard is Xu Longyun.
This standard is entrusted to Shanghai Industrial Automation Instrumentation Research Institute for interpretation.
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