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How to ensure that the bearings installed and run correctly  

2012-10-11 11:23:41|  分类: 技术 |  标签: |举报 |字号 订阅

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Dimensions and running accuracy of the bearing from GB bearing type rotating precision the rotation accuracy required bearing type [standardized] machine tool spindle, gas turbine and control machine requires high rotational accuracy, high speed and low friction, this time should be The skf bearings more than five precision. Generally use the following bearings: deep groove ball bearings, contact ball bearings, cylindrical roller bearings
The size, direction and nature of the load bearing load bearing load capacity with a basic load ratings, its value is contained in the the bearing size table FAG bearings load full of changes, such as the size of the load, whether only radial load, axial load unidirectional or bidirectional, vibration, or the degree of impact and so on. After considering these factors, again select the most suitable type of bearing. In general, the same as the inner diameter of the bearing radial load capacity according to the following order: deep groove ball bearings <angular contact ball bearings <cylindrical roller bearings <tapered roller bearings <Spherical roller bearings
Speed can adapt to the mechanical speed bearing type bearing speed limit value basis, with a limit of speed, said the value contained in the bearing size table] NSK bearings speed limit not only take on the bearing type is also limited to bearing size, cage type, accuracy class, load conditions and lubrication method, therefore, the choice must take into account these factors. The following bearings are mostly used for high-speed rotation: deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings
The TIMKEN bearings installation space can be accommodated in the bearing type within the bearing installation space due to the axis-oriented design shafting rigidity and strength, it is generally first determine the shaft, i.e., the bearing inner diameter. But there are a variety of rolling bearings of dimension series and type, should choose the most suitable type of bearing.
1. Compliant fuel and lubricants
2. Improve lubrication quality, pressure, temperature and flow of the control oil, strengthening the oil filter.
3. Bearings and journal surface quality and geometry should be strictly guaranteed.
4. Controlling the temperature state of the diesel engine, are disadvantageous in the subcooling overheating. Cold weather, diesel engine starting should be preceded by warm-up, and the hand rotating crankshaft oil into the friction surface.
5. Bearing clearance too large an impact, too small, poor lubrication, may be bush-burning.
Contour of the opening of the NTN bearings grease in the bearing formation is not the same, must be the formation of the contours, quite the draft go together a short time, in the long-term operation of the bearing temperature and smooth, this is an ideal The grease, so grease into Drainage is especially important.
    Some of the so-called eddy current type grease is not the case, is not easy to form the outline also easy to collapse, even though the formation of the contour, then repeated back to roll Daoli excess grease is strongly stirring condition for a long time, KOYO bearings torque, high temperature, and imbalance may also generate noise, the grease also perishable and loss.
Bearing temperature processing
    When IKO Bearings elevated temperatures, first determines whether the malfunction, such as indeed increased, should be processed as follows:
    (1) Check the cooling water pressure, water flow, and piping systems are normal. Ruoshui depression may filter clogging, and can not be, can stop processing when the confirmation to work, and then put into use.
    (2). Governor oil pressure should be checked and, if the low oil pressure may cause the cooling water hydraulic valve closed.
    (3) Check INA Bearings different tone, bearings and to detect bearing swing abnormal.
    (4) take oil samples observed oil color change and conduct tests to see whether the deterioration. If confirmed deterioration, should be down to be replaced with new oil.
    (5) Check the oil standard oil level is normal, if not normal, check sump oil drain valve is closed. If closed, fill oil, seal oil leakage, should stop treatment.

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