Selection of long life bearing

Source: Bearing network time: 2013-02-04

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Starting from the concept of longevity; the selection requirements for bearings are:
(1) Select the bearing type with high load capacity. The bearing type should take into account the price of the bearing; or choose a bearing with higher load but higher cost; or choose a general bearing and try to extend its life.
Use bearings with high load capacity; for example cylindrical roller bearings with crown; spherical roller bearings with symmetrical rollers; reinforced tapered roller bearings and ball bearings; spherical ball modified ball bearings; or 70,000CD The series of bearings replace deep groove (single row centripetal) ball bearings; these bearings with high load capacity can be improved due to improved stress distribution; or because of the large number of rolls, can have a higher fatigue life.
(2) Selecting the appropriate bearing scale should make the bearing scale suitable; it is necessary to accurately calculate or practice the bearing load, speed and working temperature.
The load has the greatest influence on the bearing life; therefore, although the load is the most difficult to measure, it must be measured accurately. When the load measurement is difficult; the power consumption of the motor can be measured; the power loss is calculated according to the transmission road and deducted; Until the calculation of the bearing load is relatively close to practice. The calculated or measured load is too large; the expected life expectancy of the bearing must be reduced by a larger fluctuation. åŒ¦è‚·ç’º right round å’•. If the device part promises; optional scale If the bearing of the first gear is restrained by the radial dimension; in the case of a wide bearing, the wider bearing should be selected. If it is not possible to use a wider bearing; the bearing with higher load bearing capacity can be used instead.
(3) Selecting the appropriate bearing data to select the bearing information should also take into account its price; and when you have to choose vacuum exercise or electroslag remelting steel; pay attention to the need to perfect the smooth conditions; It is hoped that the life expectancy will be exhausted. Of course; the cost of bearing made of such high-quality steel is much more expensive than that of bearings with higher load capacity; but for bearings that are difficult to assemble and difficult to assemble and disassemble in the machine; or mines and tunnels Bearings used in medium-duty machinery; extremely difficult to repair; sometimes it is necessary to think about application.

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