Simple troubleshooting tips for the abnormal temperature of the Endian bearing vibration

In the process of using the Entien bearing, there are often customers who reflect the abnormal temperature of the bearing vibration. According to the technical interpretation of the bearing group, the following factors are caused: the temperature of the general bearing rises as the speed of the bearing increases. And the temperature reached a stable level after 1-2 hours of stable operation. There are many main factors determining the temperature of the bearing, such as speed, lubricating oil, load, foreign matter intrusion and the like. If the above situation must be stopped, take the necessary inspection measures.

Customers are advised to monitor the operating temperature of the Endian bearing at any time using a thermal sensor. Long-term continuous rotation of the bearing at temperatures above 125 °C will reduce bearing life. Causes of high temperature bearings include: insufficient lubrication or excessive lubrication, lubricants. It contains impurities, the load is too large, the K bearing is damaged, the gap is insufficient, and so on. If it is not discovered and processed in time, the bearing will be scrapped. Therefore, it is necessary to continuously monitor the bearing temperature, whether it is measuring the bearing itself or other important parts. If the operating conditions are the same, any temperature change can indicate that a fault has occurred.

If the bearing produces abnormal vibration during operation, it is easy to cause damage. Specifically, it includes damage such as peeling damage, indentation damage, crack damage, and abnormal wear. Therefore, the vibration can be measured by the bearing vibration measuring device. The measured value is different depending on the operating conditions of the Entalion bearing or the mounting position of the sensor. We recommend that the customer record the value of the normal operation of the machine in advance to facilitate comparison. analysis.

The first type: observation method

If the bearing is well lubricated and properly blocks debris and moisture, it means that the oil seal should be free of wear. However, it is best to visually inspect the bearing and periodically check the oil seal when opening the bearing housing. Check the condition of the oil seal near the bearing. To ensure that they are sufficient to prevent hot liquids or corrosive liquids or gases from penetrating into the bearing along the shaft. The protective ring and the labyrinth oil seal should be greased to ensure maximum protection. The oil seal should be replaced as soon as possible if it is worn.

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FAG one-way bearing inspection and troubleshooting steps

The track sound of the bearing and its control method The track sound is a slippery continuous sound that the rolling element rolls on the raceway surface when the bearing is running. It is the unique basic sound that all FAG bearings will produce. The general one-way bearing sound is the rolling sound plus other sounds. The greater the rigidity of the bearing housing, the lower the sound pressure level of the raceway sound. If the radial clearance is too small, the sound pressure level and the main frequency of the raceway sound will increase sharply as the radial clearance decreases.

One-way bearing fatigue failure is a failure of the surface form, mainly manifested by fatigue crack initiation, expansion and fracture processes, and the long-term effects of load failure on the metal. The crack is in two ways:

1. From the surface, this is the external load caused by the cyclic deformation of the plastic surface of the FAG bearing during the rolling contact due to the plastic deformation of the working surface and the strained surface of the strain hardening surface, and finally developed in the small crack. The inner surface, the formation of surface cracks between the two, due to the intrusion of lubricant into the working surface, the open force, severely hitting the wall, forcing the crack to advance;

2, from the surface layer, repeated pressure, surface contact, initially cracked cracks at the surface where the surface is exposed, and the angle along the surface direction, to a certain depth, from the surface of the contact surface, and beyond The surface, and eventually formed an eclipse, leaving a horse pit.

From the surface of the one-way bearing, or from the crack of the surface layer, these two objectives (parts carburizing, quenching and other surface heat treatment, if there is uneven hardness, microstructure, and non-uniform internal stress and other disadvantages, then Contact stress is generally caused by the influence of the opposite underground crack. If the surface quality of the part is poor, there is a defect (oxidation, decarburization), friction or poor lubrication, from the surface crack.

The method of controlling the rolling sound is to select a low-noise FAG bearing, that is, a bearing with a small waviness, and carefully select the conditions of use. The raceway sound often affects the noise of the entire machine, and reducing the raceway sound can reduce the noise of the entire machine.

Rolling sound of one-way bearing and its control method Rolling sound is a harsh metal friction sound that can occur in cylindrical roller bearings in all occasions. Most of them occur in grease-lubricated larger type bearings, and the performance of base oil deteriorates. Grease is more likely to occur and hardly occurs when oil is lubricated. In addition, it is more likely to occur in winter. When subjected to pure radial load, it is easy to occur in the case of large radial clearance, and it is easy to occur in a certain speed range depending on the size of the model, and it will occur continuously. It will appear intermittently. Special processing methods for the outer ring raceway can prevent the occurrence of rolling noise. If necessary, the bearing can be selected, or the radial clearance of the FAG bearing can be appropriately reduced, and the grease with excellent performance and the matching with the bearing can be used. rigidity.

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