The bearing temperature can generally be estimated based on the external temperature of the bearing housing. However, it is more accurate to directly measure the temperature of the outer ring of the TIMKEN bearing by using the oil hole. The bearing temperature gradually rises from the start of the operation, and the temperature is usually stable after 1 to 2 hours. If the bearing is poorly installed, the temperature will rise sharply and an abnormally high temperature will occur. The reasons are such as excessive lubricant, too small bearing clearance, poor installation, excessive friction of the sealing device, and the like. In the case of high-speed rotation, the selection of the bearing structure and the lubrication method is also the cause.
The rotation of the bearing is checked with a stethoscope, etc., and there are strong metal noise, abnormal sounds, irregular sounds, etc. to explain the abnormality. The reasons are poor lubrication, poor accuracy of the shaft or housing, bearing damage, and foreign matter intrusion.
The divergence of the grease in the TIMKEN bearing is a divergence. It must be composed of a relatively straight draft. It should be short-lived. The bearing temperature is low and stable during long-term operation. This is a fantasy. Grease, so the grease is particularly important.
In the popular situation, the grease filling amount in the TIMKEN bearing always exceeds the practical requirement of direct intervention lubrication, saturating the cavity on the frame and the bearing cover, and forming a contour on the periphery of the rolling element. During this process, the bearing temperature rises rapidly due to the resistance of excess grease. Although most of the excess grease is squeezed out at the beginning of the run, the grease that is squeezed into the raceway attachment may still be transferred to change the rolling element into the raceway.
In the early stages of bearing operation, most of the grease is squeezed out of the raceway very quickly (less than one minute), and accumulated in the grease retaining body after the bearing migration transition body, and is discharged a small amount. At this time, the bearing temperature will continue to rise until the excess grease is completely discharged. It can be called the grease's running phase. According to the grease quality and filling amount in the bearing structure, this time may last for ten minutes. And even hours.
When grease is added to anti-friction bearings, high pressure theory may not be required unless it is used with great care. High pressure can damage bearings, waste grease, excessive grease can cause high temperatures and create an invisible environment around TIMKEN bearings. In most applications, ball or roller bearings are fully lubricated if the grease level is between one-third and one-half of the bearing capacity. The excess will usually be wasted by the sealed casing.
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