General thin-walled bearings are used to carry axial load and radial load, and their ability to carry eccentric load is very limited. If an eccentric load is applied to these bearings, it will cause unreasonable load distribution in the bearings, which will sharply reduce the service life of IKO bearings and produce heating. Load trajectory under eccentric load.Judge the fault of IKO clutch bearing through contact friction state
2. The geometric tolerance of bearing chamber is out of tolerance
The out of tolerance of the shape and position of the bearing chamber will affect the internal load distribution of the Thin-walled bearing, resulting in abnormal load traces.Judge the fault of IKO clutch bearing through contact friction state
Judge the fault of IKO clutch bearing through contact friction state
The load trace indicates that the roundness of the bearing chamber may be out of tolerance, resulting in the ball in the non load area also bearing the load. In this way, the bearing will be heated and noisy after operation.
If the load track is found after removing the Thin-walled bearing, the roundness of the bearing chamber needs to be adjusted. The roundness of geometric tolerance is out of tolerance.Judge the fault of IKO clutch bearing through contact friction state
3. The residual clearance of IKO bearing is too small
Generally speaking, normal thin-walled bearings always have a certain residual clearance during operation, which will be distributed in the non load area. The curve of the influence of residual clearance on the service life of rolling bearing. When the remaining clearance is too small, the bearing will be very easy to be stuck, resulting in early failure.
The performance of these failed bearings before burning is noise and heating, and the load track on the surface of Thin-walled bearing raceway may cause the residual clearance of IKO bearing to be too small. The factors may include: too tight fit of inner ring, too large temperature difference between inner and outer rings, etc. Adjustment and modification shall be carried out in time.Judge the fault of IKO clutch bearing through contact friction state
The common fault of IKO bearing is the contact dry friction between bearing and journal. Serious dry friction will lead to the increase of clutch bearing temperature and lubricating oil temperature, the decrease of viscosity and bearing capacity, resulting in malignant accidents such as sticking pad and burning shaft, and even damage the equipment and threaten people.
Therefore, the research on real-time monitoring and fault diagnosis of IKO bearing has attracted extensive attention.Judge the fault of IKO clutch bearing through contact friction state
At present, there are the following commonly used fault diagnosis methods of clutch bearing:
① Detect the physical parameters such as lubricating oil temperature, bearing temperature and lubricating oil pressure wave in the main oil passage;Judge the fault of IKO clutch bearing through contact friction state
② Measure the axis track, oil film thickness and oil film pressure;Judge the fault of IKO clutch bearing through contact friction state
③ Vibration and optical spectrum analysis. These methods have their own characteristics, which can reflect the fault characteristics to a certain extent, but they also have limitations.
For example, the vibration signal has the advantages of rich information and convenient sensor installation, but the main energy of the signal is concentrated in the low-frequency area below 1500hz, and the frequency of the interference signal is mostly low-frequency, which makes the signal separation more difficult. Judge the fault of IKO clutch bearing through contact friction state
Compared with ordinary vibration signals, acoustic emission signals have a wider frequency range and greater amount of information. Using high-frequency signals for fault diagnosis can effectively eliminate other low-frequency interference signals, so the signal-to-noise ratio is high. In addition, the installation of the sensor is also convenient, which can carry out nondestructive condition monitoring of the equipment in operation.
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