Calculation method of vibration frequency of ZDY100-5.6-1 gear reducer

The vibration frequency range of ZDY100-5.6-1 gear reducer under normal operating conditions is usually concentrated between 100Hz and 5kHz. This range is not a fixed value. The actual vibration frequency will fluctuate due to the comprehensive influence of various parameters such as the number of gear teeth, operating speed, load conditions, and assembly accuracy. Therefore, when conducting vibration monitoring and fault diagnosis, we cannot simply use a fixed frequency to judge the equipment status, but need to conduct a comprehensive analysis based on specific working conditions.

Judging from the vibration frequency characteristics of each system, the gear system is the main source of vibration. During the meshing transmission process of gears, periodic vibration signals will be generated due to factors such as tooth surface contact, impact, and elastic deformation. The meshing frequency generally falls in the range of 100Hz to 5kHz. The number of teeth directly affects the meshing frequency. The more teeth, the higher the meshing frequency. For example, when the number of teeth is 17, the meshing frequency will shift significantly upward, which is manifested as energy concentration in the high-frequency band in spectrum analysis.

The vibration characteristics of the bearing system cannot be ignored either. The vibration frequency caused by bearing failure is mostly concentrated in the range of 200Hz to 2kHz. This frequency band is the focus area of ​​daily vibration detection. When the bearing has problems such as wear, pitting, or cage damage, an obvious peak signal will be generated at the corresponding frequency. The type and location of the fault can be more accurately identified through spectrum analysis.

In addition, when conducting vibration measurements at industrial sites, you also need to pay attention to the interference problem of 50Hz power frequency signals. The power frequency signal of the industrial power grid is easily coupled to the vibration sensor through motors, cables, etc., causing interference to the measurement results. Therefore, during the data collection and analysis process, filtering should be done to avoid misjudgment of power frequency interference as equipment failure signal.

In terms of practical application, you can refer to the operation case of a rolling mill reducer. When the equipment is running at a speed of 150r/min, an obvious peak value of 213Hz appears in the vibration spectrum of the low-speed shaft bearing. After analysis, this peak value is directly related to the gear meshing frequency, indicating that the gear transmission state needs to be focused on. At the same time, bearing fault characteristic frequencies such as 31.25Hz may also appear in the vibration spectrum. Comprehensive research and judgment based on the specific structural parameters of the equipment are required to accurately locate the fault source.

In terms of vibration evaluation criteria, vibration speed is usually used as the main indicator. When the vibration speed of the reducer is below 1.6mm/s, the equipment is in good operating condition; when the vibration speed is between 1.6mm/s and 2.8mm/s, it is within the qualified range and can continue to operate but needs to be monitored; when the vibration speed exceeds 4.5mm/s, it indicates that the equipment may have a serious fault hazard, and it is recommended to stop the machine in time for investigation to avoid greater equipment damage.

To sum up, a systematic analysis of the vibration frequency of the ZDY100-5.6-1 gear reducer can help promptly discover potential faults and optimize maintenance strategies, thereby ensuring the long-term stable operation of the equipment.