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Tapered roller bearings and the use of matters
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| Time：2016.10.17 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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Tapered roller bearings mainly to radial-based radial, axial joint load. Bearings bearing capacity depends on the raceway angle of the outer ring, the greater the angle the greater the carrying capacity. This type of bearing is a separate bearing, according to the number of columns in the rolling bearing is divided into single row, double row and four row tapered roller bearings. Single row tapered roller bearing clearance to be adjusted when the user installed; double row and four row tapered roller bearing clearance in the factory when the product is based on user requirements given, without user adjustments.
Tapered roller bearings with conical inner and outer raceway, tapered roller arrangement between the two. The projection lines of all conical surfaces converge at the same point of the bearing axis. This design makes tapered roller bearings particularly well-suited to withstand composite (radial and axial) loads. Axial load capacity of bearings is largely determined by the contact angle α; α angle, the greater the axial load capacity is higher. The angle size is expressed by the calculation coefficient e; the larger the value of e, the greater the contact angle, the greater the applicability of the bearing to axial load.
Tapered roller bearings are usually of a separate type, i.e. a conical inner assembly consisting of an inner ring with rollers and a retainer assembly can be mounted separately from the conical outer ring (outer ring).
Tapered roller bearings are widely used in automobiles, rolling mills, mining, metallurgy, plastics machinery and other industries.
Tapered roller bearing in the process of the emergence of a trace of the main reasons is: the bearing is the device, the assembly of the inner ring, outer ring skewed; or is the process of installation and assembly of the emergence of charge trapped load, and ultimately the formation of bearing marks .
Tapered roller bearings are installed in accordance with the work specifications to stop, or will not result in many achievements, such as the form of the device or approach is not, it will form the bearing raceway surface and the formation of the surface of the ball bearing surface line marks. Deep groove ball bearing device indirectly reflects the use of bearing precision, life and function.
Tapered roller bearing quality and other aspects are better, but the rolling bearing is a precision component, its use must also be carefully carried out accordingly. No matter how high the performance of the bearing, if used improperly, you will not get the desired high performance. Bearing the use of the attention to the following articles:
(1), to keep tapered roller bearings and its surrounding clean.
Even small eyes can not see the dust, bearing will also bring bad influence. Therefore, to keep the surrounding clean, so that dust will not invade the bearings.
(2), be careful to use.
In the use of tapered roller bearings to give a strong impact, will produce scars and indentation, as the cause of the accident. Severe cases, will crack, fracture, so we must pay attention.
(3), the use of appropriate operating tools.
Avoid using existing tools instead, and use the right tools.
(4), pay attention to the corrosion of tapered roller bearings.
Operation of the bearing, the hands of the sweat will become the cause of rust. Should pay attention to the use of clean hands, it is best to bring gloves.
Tapered roller bearings use the auditory sense to identify the irregular operation is a very common method, for example, with electronic stethoscope to detect a part of the abnormal noise is experienced operators to use. If the bearing is in good working condition will issue a low whining sound, if issued a sharp hiss tapered roller bearings, squeaks and other irregular sound, usually bearing in poor operating conditions. 1, tile surface corrosion: spectral analysis found that the abnormal concentration of non-ferrous elements; iron spectrum of non-ferrous metals in the emergence of many sub-micron wear particles; lubricants water exceeded the acid value exceeded.
2, the journal surface strain: iron spectrum in the iron-cutting abrasive particles or black oxide particles, metal surface tempering color.
3, the surface of the neck surface corrosion: spectral analysis found that the concentration of iron anomalies, iron spectrum in many sub-micron iron particles, lubricants, excessive water or acid value exceeded.
4, surface strain: ferrography found in cutting abrasive, abrasive grain composition of non-ferrous metals.
5, tile back fretting: spectral analysis found abnormal iron concentration, there are many iron sub-micron iron spectrum particles wear particles, lubricants, water and acid value abnormalities.
In the liquid lubrication conditions, the sliding surface is separated by lubricating oil without direct contact, but also can greatly reduce the friction loss and surface wear, oil film also has a certain capacity to absorb vibration
Sharp squeak noise may be caused by improper lubrication. Inadequate bearing clearance can also cause metal noise. Dents on the outer ring track of a tapered roller bearing can cause vibration and cause a smooth and crisp sound. If the striking scratches caused by the installation will also produce noise, this noise will vary with the bearing speed. If there is intermittent noise, then the rolling element may be damaged, tapered roller bearing this sound occurs when the damaged surface was rolling over, the bearing if contaminants often cause hissing sound, a serious bearing damage will Resulting in irregular and huge noise.
Bearing damage can be detected by hearing, of course, but usually this time to the bearing must be replaced immediately. Therefore, a preferable method is, for example, using an electronic condition monitoring apparatus, in which a tapered roller bearing preliminarily cleaves the operation of the bearing.
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