Master the key technologies for common maintenance of FAG flange bearings

Under normal conditions, flanged bearings will naturally rise in temperature after lubrication or relubrication and last for one to two days. Stiffness and performance vibration of flange bearings are sensitive to damage of FAG bearings. For example, peeling, indentation, rust, cracks, wear, etc. are reflected in the vibration measurement. Therefore, by using a special flange bearing flange vibration measuring device (Frequency analyzer, etc.) can measure the magnitude of the vibration, and the specific situation of the abnormality cannot be inferred by the frequency division. The measured values ​​differ depending on the conditions of use or the location where the sensor is mounted. Therefore, it is necessary to analyze and compare the measured values ​​of each machine in advance to determine the judgment standard.

The temperature of the flange bearing is generally estimated by the temperature of the outdoor surface. If the oil hole can directly measure the temperature of the outer ring of the flange bearing, it is more suitable.

Usually, the temperature rises slowly as the flange bearing starts to run, and reaches a steady state after 1-2 hours. The normal temperature of the flange bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are suitable, the FAG bearing temperature will rise sharply and abnormal temperature will occur. At this time, it is necessary to stop the operation and take necessary precautions.

The thermal sensor can be used to monitor the working temperature of the bearing at any time, and to automatically alarm or stop when the temperature exceeds the specified value, the high temperature is often indicated to indicate that the bearing is in an abnormal condition. High temperatures are also harmful to FAG bearing lubricants. Sometimes bearing overheating can be attributed to the lubricant of the bearing. Long-term continuous rotation of the bearing at temperatures above 125 °C will reduce bearing life. Causes of high temperature Qingdao flange bearings include: insufficient lubrication or excessive lubrication, lubricants. Contains impurities, excessive load, flange bearing damage, insufficient clearance, and high friction caused by oil seals.

The periodic measurement of the flange bearing temperature can be performed by means of a thermometer, such as a digital thermometer, which can accurately measure the FAG bearing temperature and display it in °C or Fahrenheit. The importance of the bearing means that when it is damaged, it will cause the equipment to stop. Therefore, it is better to install a temperature detector.

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Analysis of the causes and measures for the deterioration of IKO imported bearing grease

The grease used in IKO bearings must have an anti-rust effect, and the anti-rust agent should preferably be insoluble in water. The grease should have good adhesion and form an oil film on the surface of the steel. The grease will become soft during machining and cause leakage. In normal operation, the grease will be transferred from the IKO bearing housing to the IKO bearing. If the mechanical stability of the grease is not enough, during the operation, the structure of the soap of the grease will mechanically disintegrate, causing the grease to be destroyed, thereby losing the lubricating effect. If the grease is wrongly selected, all the measures to prevent the IKO bearing are futile. It is important to choose a grease whose base oil viscosity provides sufficient lubrication at the operating temperature. The viscosity is mainly affected by temperature, it decreases with increasing temperature, and it rises when the temperature drops. Therefore, it is necessary to know the viscosity of the base oil at the operating temperature. Mechanical manufacturers often specify the use of certain greases, however most standard greases are available in a wide range of applications.

Grease is critical in the use of IKO bearings. If you use a deteriorated grease, it will not only function as it should, but it will also damage IKO bearings.

1 oil flow observation method

Take two measuring cups, one of which is filled with the lubricating oil to be inspected, the other is placed on the table, and the measuring cup filled with lubricating oil is lifted off the table 30-40 cm and tilted to allow the lubricating oil to slowly flow to the empty cup. In the middle, observe the flow, the quality of the lubricating oil flow should be slender, even, continuous, if the oil flow suddenly and slowly, and sometimes there is a large flow, then the lubricant has deteriorated.

2 handcuffs

The lubricant is rubbed repeatedly between the thumb and the index finger. The better lubricant feels lubricated, less wear debris, and no friction. If you feel a large friction between the fingers, it means lubricating oil. There are many impurities inside, can not be reused, should be replaced with new lubricants.

3 illumination method

On a clear day, use a screwdriver to pry the lubricant at a 45-degree angle to the horizontal. Observe the sunlight and observe the oil droplets. Under the light, it can be clearly seen that there is no wear debris in the lubricating oil, which can continue to work. If the grinding debris is too much, the lubricating oil should be replaced.

4 oil drop trace method

Take a clean white filter paper, drop a few drops of oil on the filter paper. After the oil leaks, if there is black powder on the surface, touch the hand with a feeling of resistance, it means that there are many impurities in the lubricant, good lubricant No powder, it is dry and smooth by hand, and it has yellow marks.

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