This standard specifies the objective evaluation indexes and objective evaluation values ​​of gear device noise. This standard is applicable to the acceptance of closed gear devices with separate housings that transmit power before leaving the factory or after overhaul. This standard does not apply to some special or auxiliary gear devices, such as compressors, pumps, engines that are integrated with transmission gears, and some gear devices that do not transmit power. This standard allows the acceptance of gear devices based on noise test conditions, evaluation indexes and evaluation values ​​determined by the agreement or order contract between the manufacturer and the user. JB/T 5076-1991 Gear device noise evaluation JB/T5076-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5076-91
Gear Device Noise Evaluation
1991-06-11 Issued
The Ministry of Machinery and Electronics Industry of the People's Republic of China Issued
1992-07-01 Implementation
Mechanical Industry Standard of the People's Republic of China
Gear Device Noise Evaluation
1 Subject Content and Scope of ApplicationbZxz.net
This standard specifies the objective evaluation indexes and objective evaluation values ​​of gear device noise. JB/T5076--91
This standard applies to the acceptance of closed gear devices with separate housings for transmitting power after leaving the factory or overhaul. This standard does not apply to some special or auxiliary gear devices, such as compressors, pumps, engines integrated with transmission gears, and some gear devices that do not transmit power. This standard allows the acceptance of gear devices based on the noise test conditions, evaluation indexes and evaluation values ​​determined by the agreement or order contract between the manufacturer and the user.
2 Reference Standards
GB6404 Determination Method for Sound Power Level of Gear Device Noise. 3 Determination Method
The determination of the sound power level of gear device noise shall be carried out in accordance with the provisions of GB6404. The noise evaluation of gear devices must be carried out under the same test conditions. 4 Evaluation Index
This standard stipulates that the power-to-noise ratio of gear devices is used as the evaluation index of its noise. 4.1 Definition of Power-to-Channel Ratio
U. =10 1g(
wherein, V is the power ratio of the gear unit, dB; P is the rated power of the gear unit, W;
w is the noise power of the gear unit, W. (1)
V. The physical meaning of V. is the decibel value of the ratio of the rated power of the gear unit to its noise power. The larger the value, the smaller the noise loss and the higher the quality of the gear unit.
4.2 Calculation steps
4.2.1 First, determine the noise power level LwA of the gear unit according to GB6404.4.2.2 According to Lwx=101g (age)
), and substitute W. into W
U in formula (1). =10lgP~Lwx+120...
Wherein: W.—reference sound power, W;
Approved by the Ministry of Machinery and Electronics Industry on June 11, 1991 (2)
Implemented on July 1, 1992
4.3 Evaluation grading
JB/T 5076-91
Gear equipment and noise evaluation grading table
Power ratio.
>90~95
>85~96
>80~ 85
>75~80
>70~75
>65~70
Noise evaluation grading table U. The value size is divided into A, B, C, and D levels: A: The gear device has a high quality level; B: The gear device has a relatively high quality level; C: The gear device has a general quality level, and D: The gear device has a relatively low quality level.
A, B, C, and D levels are according to U in the table. The value size can be divided into three levels (see table), additional notes:
This standard was proposed and managed by the Zhengzhou Mechanical Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Zhengzhou Mechanical Research Institute. The main drafters of this standard were Chen Linghao and Qian Zhenxuan. 2
Power-to-noise ratio
>60~65
>55~60
>50~55
>45~59
>40~45
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