Bearing fault mechanism

1. Bearing fault mechanism
Bearings are more common in most of the machinery and equipment, and has high utilization rate, but also the existence of higher damage rate.
Bearing has good starting performance, high reliability, convenient maintenance, many a bit is widely used and mechanical devices.
Bearings are in a state of constant velocity, the device has high bearing capacity, long-term stress effect, lead to bearing relative to other parts, and prone to failure, in all kinds of mechanical failure type, bearing fault occupy larger proportion.
Rolling bearing, by contrast, is greater than sliding bearing radial size and vibration reduction ability is poorer, machinery and equipment under a state of high speed rolling bearing is less than the life of the sliding bearing, noise is high among them is the main purpose of centripetal bearing under radial force and its composition includes four parts, namely, inner and outer ring, rolling body and rolling body cage.
Inner ring set on the shaft neck tightly with the axis synchronous rotation, while the outer ring in the bearing hole.
When do relative rotational movement on inner and outer, scrolling experience, outside and inside the outer ring weeks rolling on the rolling, in order to prevent friction cage to separate the two.
Most cases bearing is problem is mainly due to the operation in the process of sealing shaft sleeve and a fixed bolt loose parts, rolling element and cage roller wear and tear, or bearing gland, shaft sleeve, etc have crack, the impurities such as dust or water into the bearing box from these gaps cause poor lubrication oil dirty, eventually lead to bearing failure
2. Bearing damage.
Under normal circumstances, as long as the normal use, the bearing can be used to fatigue life.
Bearing appears not durable, premature damage and fatigue life are relatively early damage, is known as the bearing failure.
Investigate its reason, bearing failure is usually due to install or do not pay attention to when using the bearing lubrication, lead to a foreign body from external invasion, or is caused by bearing shell heat affected poor lubrication, and premature failure.
3. The common faults of the bearing.
(1). Bearing discoloration.
Bearing in the condition of continuous high temperature operation, can produce a black or blue.Bearing discoloration: was the main cause of bearing inner lubrication is not in conformity with the technical requirements;Bearing installation process into dirt or impurities;Bearing and shaft neck, with the shaft hole is relatively loose kuang, sliding friction caused the bearing inner and outer ring;Bearing hole and shaft neck between different heart, lead to bearing during operation is abnormal;Bearing due to overdrive or overload operation, the operation itself design bearing capacity;Small conical roller bearing the axial clearance of bearing and seal, gasket, and have great friction bushing, etc.
(2). The crack of bearing inner ring and outer ring.
On the bearing inner ring and outer ring, produce different degrees of cracks, mainly due to: used in bearing quality defects or bearing steel internal defects;Bearing impact of large external load;
Installing and removing bearings, bearings directly by iron, result in the crack of the bearing inner ring and outer ring;
Bearing inner ring and outer ring and the hole and shaft neck with bad, result in the stress of the raceway uneven, cracks on the inner ring and outer ring.
(3). Bearing corrosion.
Bearing seal failure, leading to the external bearing inner dirt or moisture, cause bearing corrosion.
(4). Ball or roller broken.
Due to the installation of the ball or roller bearings, the bearing gap is too small, in use process by severe shock, lubricants in hard material such as mixed with the iron filings, cause the ball or roller broken.
(5). Race pit scar.
Bearing by external shock load or due to bad lubrication, lead to race beyond mechanical design standards, to produce pit scar.
(6) bearing rotation.
Bearing speed slower, turn can't rotate or with the hand, this is mainly due to the bearing is not clean, bearing journal, with the inner ring or outer ring pore is too small, result in deformation of bearing or bearing is larger, eventually lead to working hard.
Supplier
BMB Bearings ia a precision bearing enterprise specializing in the production of double row angular contact ball bearings, double row deep groove ball bearings, and single row angular contact ball bearings. The company is a end bearings manufacturer enterprise producing double row angular contact ball bearings in China. Its models cover 3200 series, 3300 series, 3000 series, 3800 series, 3900 series, etc. The product accuracy grades are: P0, P6, P5, P4, and the products are widely applicable.
The company also maintains an extensive inventory of superior roller bearings, ball bearings, Deep Groove Ball Bearings, Selfaligning ball bearing, Angular Contact Ball Bearings, Thrust Ball Bearings and much more.