Incorrect bearing selection is the key to rapid damage

"All types of bearings have different characteristics due to their different designs.Due to the variability and complexity of the specific installation site and application of the bearing, there is no fixed mode for the selection of bearing type. When selecting the bearing type to adapt to the specific installation site and application conditions of a host, it is suggested to take the following major factors into consideration.

Allow space
Mechanical design, the general first determine the shaft size, and then choose the bearing according to the shaft size.Usually, the small shaft choose ball bearing;Cylindrical roller bearings, adjustable roller bearings, tapered roller bearings (sometimes also optional ball bearings).If the radial space of the mounting part of the bearing is limited, the bearing with a small height of the radial section should be adopted.For example, needle roller bearings, some series of deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings or self-aligning roller bearings and thin-wall bearings.If the axial space of the mounting part of the bearing is limited, the bearing with smaller width size can be used.

Bearing load
Load size load size is usually the determining factor in choosing the bearing size.The bearing capacity of roller bearing is larger than that of ball bearing with the same dimension.Usually ball bearings are suitable for light or medium loads, roller bearings are suitable for bearing heavy loads.

Load mode pure radial load can choose deep groove ball bearing, cylindrical roller bearing.Thrust ball bearing and thrust cylindrical roller bearing can be used for pure axial load.Radial load and axial load (combined load), the general choice of angular contact ball bearings or tapered roller bearings.If the radial load is large and the axial load is small, the bearing person WeChat professional!Deep groove ball bearings and cylindrical roller bearings with internal and external rings are optional.If at the same time there are shaft or shell deformation and installation of the neutral poor situation, you can choose adjustable ball bearings, adjustable roller bearings.If the axial load is large and the radial load is small, the thrust angular contact ball bearing can be selected. If the four-point contact ball bearing also requires the performance of centering, the thrust centering roller bearing can be selected.

Common bearings failure and solutions

Bearing is an important part of machinery equipment,the bearing will be damaged in application.Different failure,FRB Bearings have different solutions.

1.Failure of grease or machine oil, wrong model selection
Solution: choose the right type of lubricant

2.Low oil level or insufficient grease
Solution: the lubricating oil must be below the center of the bottom of the rolling body, and the grease in the bearing box fills about 1/3 to 1/2 of the space

Be careful !！Six big failure of bearings

 

Bearing is the core part of mechanical . We can check the fault of bearing timely to ensure the normal operation of machinery.Now let's look at six big failure of bearings.

1.Fatigue
Bearing fatigue is characterized by spalling of bearing raceway.This is because the strength of the bearing steel particles decreases, causing the particles to peel off the raceway.The surface of the cracked bearing is rough, which will produce noise and vibration.

Normal fatigue damage occurs when the bearing reaches its expected life under normal load and working conditions.This form of damage is predictable and is caused by metal damage under continuous load.

Research and treatment method of bearing damage for vibrating screen in mining machinery equipment

Dynamic screen is a common equipment in mining machinery, and its vibration is mainly realized by exciter.The exciter forms are diverse, and the widely used eccentric-block external structure has the characteristics of light weight, compact structure, lubrication concentration of transmission parts, convenient maintenance and low manufacturing cost.However, there is a general problem in this structure, that is, the bearing life in the exciter is short, and the bearing heating and burning loss often occur, which seriously affects the normal operation of the vibrating screen.

The operating condition of the exciter is harsh, not only the environment humidity is large, the dust is much, the speed is high (750~1400r/min), and there is a strong vibration impact.After practical experience, the main bearing damage is: