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.

Second: Listening

It is best to use the sense of hearing to identify if the Entien bearing is working correctly. If the bearing is in good working condition, it will make a low humming sound. If it is a sharp hum, arpeggio and other irregular sounds, it usually indicates that the bearing is in poor working condition.

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Technical repair method for NTN bearing

NTN bearings are mass-produced mechanical parts, and the manufacturing precision is very strict, and the degree of technical specialization is very high. Therefore, for most of the easy-to-buy bearing types, it should be more cost-effective to buy than in the following cases. Next, consider the bearing repair problem, namely:

(1) A large number of bearings of the same type used in large factories are mainly in the form of wear on the rolling surface, fatigue or fretting abrasion, especially the damaged parts are mostly cages or rolling elements, and the ferrules or gaskets are still repaired. value;

(2) Large and extra large bearings, which have no major damage to the parts due to failure or failure, or expensive NTN bearings must seek to extend their useful life;

(3) Some types of bearings that are really difficult to purchase, have no spare parts after failure and have to be repaired, especially imported bearings;

(4) The bearing has slight damage, such as slight rust generated during the inventory period, and slight fretting abrasion caused by transportation. It is a pity that such repair is easy and abandon.

In addition to economics, the repair of NTN bearings is technical, which requires the repairer to fully understand the corresponding technical requirements of the bearing, and the structural, technical and material characteristics of the bearing and its parts, otherwise it is difficult to guarantee the repair of the bearing. Have the desired effect.

In the business of repairing bearings, if the cooperation of professional bearing companies can be obtained, the following benefits may be obtained:

(1) The technical requirements of each process of repair can be clarified, and how to ensure the overall quality of the repaired bearings,

(2) It is possible to utilize many of the specialized experience of specialized bearing plants, which can reliably, efficiently and economically meet process requirements;

(3) It is possible to order a tool for a professional bearing company, which can be economical and saves a lot of trouble;

(4) Orders such as cages, rolling elements, rivets, etc. can be ordered from professional bearing companies, which may make the repair work simple, convenient and economical.

If the NTN bearing is mounted on the adapter sleeve, determine the direction of the housing. The nozzle tip of the housing cap should always be on the other side of the adapter nut. Care must be taken in the direction of the entire housing as the top cover and base must be installed in the original orientation.

1. Bearing installation and disassembly are sometimes involved; the movement of heavy objects, the use of tools and other equipment, or the use of high pressure oil.

2. Make sure the environment is clean.

3. Check the size and shape tolerances of the journal.

4. Check that the surface roughness Ra of the support surface is not more than 12.5 μm. The flatness tolerance should be IT7. For applications with lower requirements, IT8 is available.

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