FAG bearing speed limit testing requirements and processing methods

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FAG bearing speed limit is the limit value does not produce burn the friction heat can continuously rotate. FAG Bearings the ultimate speed by the FAG bearing size, type, lubrica tion, precision oil clearance, load a variety of factors, but the most important thing is the lubricant and the influence of the ambient temperature. Rotating at high speed, especially when the speed is close to or exceeds the speed limit described by the size of the table, the main should pay attention to the following matters:
(1) the use of high-precision FAG Bearings;
(2) analysis of the FAG bearing internal clearance more, considering the temperature rise generated FAG bearing internal clearance reduction;
(3) analysis of lubrication. Circulating lubrication for high-speed rotation, spray lubrication, oil mist lubrication and oil lubrication lubrication.
(4) Analysis of the material type of the holder. For high-speed rotation, suitable copper alloy or a phenolic resin cutting holder. There is also applicable to high-speed rotation of the synthetic resin molded retainer;
For small machinery, can be rotated by hand to confirm whether or not to rot ate smoothly. Check project include:
1, whether the result of the nick, indentation caused by dysfunctional;
Bad, whether due to the installation, mount processing poor torque unstable;
3, whether because of the clearance is too small, installation errors, seal friction caused by the torque is too large, and so on.
If any, not above abnormal phenomenon, you can start a power running.
However, for large machinery can not be manually rotated. So idling start immediately after the power is shut, the machinery idle, check the presence or absence of vibration, noise, whether the rotary member in contact with, and so, after confirming that no abnormality, into the power running.double bearing
Power running from the no-load low speed, slowly increase the rated operation to the given conditions. Commissioning checks matters: whether there are abnormal Sound FAG bearing temperature chan ges, the leakage of the lubricant, or discoloration. If abnormal, should immediately suspend the operation, inspection machinery necessary to remove the bearing checking.
FAG bearing temperature check. Speculated usually according to the external temperature of the bearing. However, the use of the hole direct measurement of the bearing outer ring temperature is more accurate. FAG bearing temperature is gradually increased from the start of the operation, usually 1 to 2 hours after the temperature stabilized.
If the the FAG bearing mounting bad, the temperature will be a sharp increase in abnormal high temperature. The reason lubricant such as excessive bearing clearance is too small, poor installation, sealing device friction is too large. High-speed rotation of the occasion, FAG bearing structure, lubrication mode selection error is the reason.
The FAG bearings sound check. Turn the sound with the stethoscope and other checks, if a strong metal noise, abnorma l sound, irregular sound shows abnormal. Noise, poor lubrication, shaft or FAG bearing accuracy and bearing damage, foreign invasion.
(1) The method of using chemical additives bearings, to add a certain amount of chemical additives in lubricating oils, the bearing noise can be reduced, such as Tianjin, the additive noise of the same plant the production of low noise grease can be based on the lower 3.9 origl bearing noise, 9.2 dB, suitable for miniature and small bearings.
(2) absorption or vibration isolation devices the inhalation or isolation device, in order to reduce the noise, or isolation bearing FAG bearing noise, and achieved good results, but it is often paid a high price in the economy, sometimes larger bodies, hot changes in conditions, or rust easily, use should be considered thoroughly, and before taking other measures to achieve low noise also can not in the future use of the objectives of the Act. The most simple example is a high speed, instead of the thrust bearing and thrust radial thrust bearing or a thrust bearing housing to withstand the ball bearings in the outer plastic jacket withdrawing rust lubricant, allowing the cylindrical bore in the general case a plastic insert, or in the same group, but can not control the rotation and adjacent to the mechanical friction or interference. This approach has a certain role in the muffler. Another example is to add a set hole in the bearings and the middle seat between, you can spread the attenuation of the vibration force bearing seat rotation system, but it needs to be deployed properly, or may have the opposite effect.
Another example is the use of sound - acoustic cover noise will be completely closed system on or off. This reduction in noise in the interior the 0.6 LMM the inner surface of the thick steel plate, glass fiber, or a polyurethane foam, the surface of the small uniform φ1.2-1.5MM hole, about the entire inner surface of the total area of the hole covering 25-30%, the outer surface of the steel sheet thickness of 2mm. For elimting high-frequency noise, with the inner surface of the hole, in order to elimte the low frequency noise, such a glass fiber or foam, the outer surface of the thick steel plate is used to isolate the noise rumors.ball roller bearing
(3) changing the host FAG bearing noise, the corresponding parts of the speed of the method is not very sensitive to the load, but the speed is very sensitive to conditions permit, to reduce the speed and increase the torque of the ways to achieve the same purposes, but it reduces the noise. To reduce the noise pump system, the origl use of the motor speed 1430r/min under flow 10L/min pumps, speed 710r/min motor and larger pump and after the pump to get the same flow pump bearings, oil pump motor bearing noise is significant significantly lower, but the expanding footprint of the entire organization , the cost increase.