Due to some characteristics of structure and working principle, the vibration signal of gear is more complex. When diagnosing the vibration fault, it is often necessary to analyze it in time domain and frequency domain at the same time. The characteristic frequency of gear fault is basically composed of...
There are not only meshing frequency and side frequency components in gear vibration signal, but also other vibration components. In order to effectively identify gear fault, these components need to be identified and distinguished. Additional pulse The signals generated by the modulation of gear signals are generally symmetrical to...
Increase the center distance. The center distance is one of the main parameters to determine the bearing capacity of the gear pair. The contact stress of the tooth surface is inversely proportional to the center distance of the gear pair. But it is often limited by the mill structure...
In addition to the influence on the vibration amplitude, the load fluctuation caused by gear load nonuniformity, gear pitch nonuniformity and fault will inevitably produce torque fluctuation, which will cause gear speed fluctuation. This kind of fluctuation is frequency modulation (or phase modulation) in vibration. For gear drive, any...
There are a lot of fault information in the modulation of gear vibration signal, so it is very important to study the signal modulation for gear fault diagnosis. In frequency domain, the result of signal modulation is that the side band component appears around the meshing frequency of gear....
The common heat treatment methods of gears are surface quenching, carburizing quenching, nitriding, tempering and normalizing, Surface quenching: surface quenching is a heat treatment method to quench the surface of steel parts while the core remains the original structure. It is commonly used in medium carbon steel or medium...
The frequency components of gear failure are very complex, which are all broadband signals. According to the introduction of some data, the relationship between the common faults of gears and the characteristic frequency, its harmonic and side band is summarized as follows: ① The failure caused by the uniform...
All kinds of faults of gears are embodied in a transmission error in operation, that is, the difference between the actual angular position of the output shaft and the ideal angular position of the output shaft without error or deformation when the gears transmit constant torque, which constitutes the...
The common materials are forged steel, cast steel and cast iron. Forged steel: According to the hardness of tooth surface, it can be divided into two categories When HB < 350, it is called soft tooth surface When H8 ＞ 350, it is called hard tooth surface Hardness of...
Gear is the most commonly used mechanical transmission parts, gear failure is also a common failure of rotating equipment. According to relevant statistics, gear failure accounts for 10.3% of rotating machinery failure. Gear fault can be divided into two categories, one is bearing damage, imbalance, misalignment, gear eccentricity, shaft...