FAG bearing damage and countermeasures?

FAG bearing maintenance, overhaul, and abnormal handling

In order to maintain the original performance of the bearing in a good condition for as long as possible, it is necessary to maintain, repair, and prevent accidents, ensure the reliability of operation, and improve productivity and economy. Maintenance is best carried out on a regular basis in accordance with the operating standards for the mechanical operating conditions. The contents include monitoring of operating conditions, replenishment or replacement of lubricants, and inspections for periodic disassembly.

FAG bearing damage and countermeasures

In general, if the bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidents that are prematurely damaged and cannot be used. This early damage, as opposed to fatigue life, limits the quality of what is called a fault or accident. Many of them are caused by inadvertent installation, use, and lubrication, and foreign objects intruding from the outside are insufficiently studied for the thermal effects of the shaft and the outer casing.

Regarding the damage state of the FAG bearing, for example, the jam of the ferrule of the roller bearing, as a cause, the lubricant is insufficient, unsuitable, the defect of the oil supply structure, the foreign matter intrusion, the bearing installation error, the shaft deflection If the song is too big, there will be coincidences of these reasons.

Therefore, it is difficult to know the true cause of the damage by only investigating the bearing damage. However, if you know the mechanical use of the bearing, the conditions of use, the structure around the bearing, and the situation before and after the accident, combined with the damage state of the bearing and several reasons, it can prevent similar accidents from happening again.

For more information and purchase please visit: https://www.supplyforever.com

Vibration motor imported bearing installation skills

When the imported bearing replaces the vibration motor, the effect is different, and the same bearing as the original model must be used, and the effect in this aspect has a better meaning, so that it can be used in this respect. Reflects better results. First introduce the installation of imported bearings from the following situations.
    When replacing a new bearing with a vibrating motor, the same bearing as the original model must be used.

    1) Wash the bearing with kerosene, press it into the bearing seat, fill the roller of the outer ring of the bearing with Shell No. 3 lithium base grease to two-thirds full, apply evenly with the net hand, install the bearing gland, and apply the bolt The fastening bolt of the anti-loosening rubber presses the bearing gland;

    2) The bearing is a cylindrical roller bearing with a detachable inner casing. The bearing should be placed on the rotating shaft and placed in place;

    3) Mount the bearing housing on the casing. If there is grease grease hole, it must be aligned. Pressing the bearing block with the fastening bolts of the anti-loosening rubber;

    4) The inner and outer eccentric blocks are mounted on the rotating shaft and are in place. If there is an axis key, the shaft key should be inserted into the keyway and then the outer eccentric block should be installed, and the shaft can be mounted on the rotating shaft with the retaining ring;

    5) Tightly fix the eccentric block fastening bolts and turn the adjustable eccentric block to the angular position before the unloading and tighten the fastening bolts. After the above assembly is completed, the shaft should have a certain axial movement;

6) The protective cover on both ends of the upper vibration motor is fastened with screws.

The imported bearings have certain changes to the installation form of the vibration motor and other aspects of the performance, and the form considered from different angles has a certain change effect, and slowly the installation situation of all aspects has also been I understand it.

For more information and purchase please visit: https://www.supplyforever.com

Medium pressure pump bearing temperature classification

As the temperature rises, the heat generation problem of each device becomes more prominent for the 9FA combined cycle generator set.
Therefore, it is necessary to strengthen the monitoring of the bearing temperature and motor coil temperature of each equipment to ensure safe and economic operation of the unit under high temperature conditions.
     Based on this expectation, we especially strengthened the monitoring of the temperature and other parameters of various types of equipment during the operation of the unit. On April 12th, the duty officer noticed that the #2 machine A medium pressure pump pump free section bearing temperature was high (74 ° C), while strengthening the on-site inspection of the equipment. In the afternoon, it was found that the #2 machine A medium pressure pump pump free section bearing temperature increased abnormally, up to 97.1 ° C (jump pump value 100 ° C). Then contact the treatment, and at the same time enable the B standby medium pressure pump, and stop the A running medium pressure pump. On-site measured medium pressure to the pump bearing shell temperature is 90 ° C, while the bearing oil level is about 70%.
     It is precisely because of the expectation that the pump will be avoided due to the high bearing temperature caused by the medium pressure pump, and the harm caused by the abnormal operation of the medium pressure pump to the safe operation of the unit will be avoided.

For more information and purchase please visit: https://www.supplyforever.com

Bearing selection

Summary of bearing selection:


    The market requirements for various mechanical devices and instruments using rolling bearings are becoming increasingly stringent, and the conditions and performance required for bearings are becoming increasingly diverse. In order to be able to select the most suitable bearing from among a large number of structures and sizes, it is necessary to study from various angles. When selecting a bearing, generally considering the bearing arrangement as a shaft system, the ease of mounting and dismounting, the space allowed for the bearing, the size, and the marketability of the bearing, the bearing structure is roughly determined. Secondly, the bearing dimensions are determined while comparing the design life of various machines using bearings and the various endurance limits of the bearings. When selecting a bearing, it is often preferred to consider only the fatigue life of the bearing. The grease life, wear, noise, etc., which occur due to aging of the grease, also need to be fully studied. Furthermore, depending on the application, it is necessary to select a bearing that is specially designed for accuracy, clearance, cage structure, grease, and the like. However, there is no order or rule for selecting bearings. It is especially practical to consider the conditions, performance, and most relevant requirements for the bearings.


    ○The conditions and performance required for the bearing

    ○ Conditions of use, environmental conditions

    ○ Bearing installation part size items

    ○The space allowed by the bearing

    ○The size and direction of the load

    ○Vibration, shock

    ○Rotation speed, the limit speed of the bearing

    ○The inclination of the inner and outer rings

    ○Axial direction fixing and bearing arrangement

    ○Easy loading and unloading

    ○ noise, torque

    ○ Rigid

    ○Market and economy


    Determine the bearing structure and arrangement

    ○Use mechanical and design life

    ○ Equivalent dynamic load or equivalent static load

    ○ Rotation speed

    ○ Allow static load factor

    ○ Allow axial load (in the case of cylindrical roller bearings)


    Determine the bearing size

    ○The accuracy of the rotary runout

    ○High speed rotation

    ○ Torque change


    Determine the bearing accuracy level

    ○ cooperation

    ○ Temperature difference between inner ring and outer ring

    ○ Rotation speed

    ○The inclination of the inner and outer rings

    ○Preload


    Decide (internal) clearance

    ○ Rotation speed

    ○ noise

    ○Use temperature


    Determine the shape and material of the cage

    ○Use temperature

    ○ Rotation speed

    ○Lubrication method

    ○ Sealing method

    ○Maintenance and maintenance


    Determine the lubrication method, lubricant, sealing method

    ○ Loading and unloading order

    ○Work card mold

    ○ Size related to installation


    Decide on the size associated with the installation


    Decide on loading and unloading methods


    Bearings and parts around the bearings


    Final specification

For more information and purchase please visit: https://www.supplyforever.com