FAG automotive bearings use check and maintenance points during operation



The inspection of the automotive bearings during operation is very important and cannot be ignored. It mainly checks the rolling sound, vibration, temperature, lubrication status of the bearings and so on. Let us briefly introduce the rolling sound of FAG bearings. The size of the rolling sound and the sound quality should be checked by the sounder to check the running car bearings. The advanced tools will accurately determine the problem. Bearings Even with slight peeling and other damage, abnormal sounds and irregular sounds are emitted, which can be distinguished by the sounder.

Then the vibration of the car bearing is checked to see if the damage of the bearing is very sensitive. Whether it is peeling, indentation, rust, crack, wear, etc. will be reflected in the vibration measurement of the FAG bearing. Therefore, by using a special automotive bearing vibration measuring device (frequency The analyzer can measure the magnitude of the vibration, and the specific situation of the abnormality cannot be inferred by the frequency division. However, the value measured by each machine differs depending on the conditions of use of the bearing or the mounting position of the sensor. Therefore, it is necessary to analyze and compare the measured values ​​of each machine in advance to determine the judgment standard.

1. When using the car bearing, connect the surrounding environment cleanly, do not stick sweat and dirt. It is delineated by the staff who know the bearing, and it is especially necessary to be careful about acid, indentation, damage, etc. In order to ensure the function of the bearing, the FAG bearing should be protected, nursed and inspected according to the equipment's homework scale. The form includes monitoring the operation status, making up the smoothing agent, and checking the assembly on schedule.

2, bearings should not be stored directly on the ground (need to be more than 30cm off the ground) to prevent direct light and cold walls. In order to prevent rust, it is stored in an environment with a temperature of about 20 ° C and a humidity of 65%. The car bearings are arranged in an acidic atmosphere, which is prone to rust and discoloration. Gloves and kapok are used to wipe the bearings, shafts, and outer casings. The external and common sectors of FAG bearings are the cause of anomalies, and are necessary to be meticulous.

3, bearing measurement deviation, should be 10% of the public service as follows. The general measurement deviation value is 10% to 33%, and with the progress of the public service grade, the greater the proportion of deviation, that is, the smaller the public service, the higher the proportion of deviation, and the public service of the automobile bearing Above IT5, it is difficult to reach 10%. Measuring deviations not only means that the inspection of public service can be relaxed by 10%, but to give a certain safety margin to ensure that the user accepts the pass according to the scale.

4. Before the vehicle bearings are inspected, they must be arranged in a metal plate in the inspection occasion with the gauge block, the scale member and the measuring instrument used for the inspection. If the temperature of the objects is allowed to be uniform and room temperature is allowed to be faster. Bearings that have been dried or dried should be dripped into the smooth oil and immediately entrusted for inspection. At this time, there is no oil film shelter outside the FAG bearing. In all the inspection processes, the skin should not be directly hit and the operator should wear it. Clean gloves, or apply anti-rust agent on the hand, but it is necessary to prevent the anti-rust agent on the hand from mixing into the rotation of the car bearing, otherwise the measurement result will be faulty.
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Lubrication tips for Swedish SKF bearings



Rust prevention performance

The grease used in SKF bearings must have an anti-rust effect, and the anti-rust agent should preferably be insoluble in water. Grease should have good adhesion to form an oil film on the surface of the steel, even if the grease is filled with water.

Mechanical stability

Grease becomes soft during machining and causes leakage. When there is a vibration application example, grease will be trapped inside the bearing by the bearing housing. If the mechanical stability of the grease is insufficient, the grease will be continuously thrown out of the bearing, which will cause mechanical collapse of the soap structure and destruction of the grease.

Oil seal

Oil seals are necessary to protect bearings and lubricants from external contamination, and no matter whether debris or moisture can penetrate into the bearings to prevent damage. Proper installation and maintenance is an important factor in the longest service life of the bearing. At the same time, attention must be paid to the cleanliness of the bearings, the correctness of the choice of bearings and the selection of appropriate installation and maintenance tools. Bearings must be protected from contaminants and moisture and must be properly installed and lubricated. The design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, as well as the special maintenance play an important role.

Mixed grease

Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually soften and eventually damage may occur due to the loss of grease. If you don't know which type of grease the bearing originally used, you should first remove the old grease inside and outside the bearing to add grease.

Classification of oils and fats

According to temperature and working conditions: grease can be classified according to their allowable working temperature. The consistency and lubricating ability of grease are affected by working temperature. Imported bearings operating at a certain temperature must choose the correct consistency at the same temperature and A grease with good lubrication. Grease is manufactured in different operating temperature ranges and can be classified into low temperature (LT), medium temperature (MT) and high temperature (HT) greases. At the same time, there is a type of grease called EP (extrusion resistant) or EM (resistant to extrusion and added molybdenum disulfide), with additives to enhance the strength of the lubricant film.

Choose grease

If the grease is wrongly selected, all measures to prevent bearing damage are in vain. It is important to choose a grease whose base oil viscosity provides sufficient lubrication at the working temperature. The viscosity is mainly affected by temperature, and it rises with temperature. And falling, it rises when the temperature drops. Therefore, it is necessary to know the viscosity of the base oil at the working temperature. Machine manufacturers usually specify the use of certain greases, and most of the standard greases can be used in a wide range.
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