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Bearing common sense (below)
Source: China Bearing Network Time: 2013-01-07
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The smooth intention of the rolling bearing is to reduce the internal conflict and wear of the bearing; to avoid burning, its smoothing effect is as follows:
.1), reduce conflict and wear and tear.
The ferrules, the tumbler and the holder that make up the bearing touch each other; avoid metal touch; reduce conflict and wear.
.2), extended fatigue life.
The tumbling fatigue life of the bearing; in the rotation; the rolling touch surface is smooth and outstanding; then extending. Conversely; the oil viscosity is low; the smooth oil film thickness is not good;
.3), discharge conflict heat, cooling.
Circulating oil supply method, etc. can use oil to discharge heat from conflicts; or heat from outside; cooling. Avoid bearing overheating; avoid aging of smooth oil itself.
.4), other also to prevent foreign matter from invading the inside of the bearing; or to avoid rust and corrosion.
Smooth method:
The smooth method of the bearing; it is divided into smooth grease and smooth oil. In order to make the bearing perform well, first; to choose the appropriate application conditions, the application of the smooth method. If only thinking smooth; oil smooth smoothness is dominant. The grease is smooth and has the expertise to simplify the layout around the bearing; it compares the smoothness of the grease with the smoothness of the oil.
Bearing device:
Whether the bearing device is correct; affects the accuracy, life, and function. Therefore, the device for drawing and assembling part of the bearing should be fully studied. It is expected to be installed according to the operating specifications. The working specifications are usually as follows:
.1), remove the bearing and bearing components. 2), check the dimensions and finishing conditions of the dry components. 3), the device. 4), after the bearing is installed. 5), the supply of smoothing agent is expected to be in front of the device The time is divided; the bearing package is opened. Usually the smooth grease is smooth; it is not removed; the smooth grease can be directly filled. The smooth oil is smooth; usually it is not necessary to remove; however; the instrument or high-speed bearing, etc.; should be washed with clean oil Remove the rust inhibitor applied to the bearing. Remove the bearing of the rust inhibitor; easy to rust; therefore can not be placed regardless. Further; bearing sealed with smooth grease; can be used directly without cleaning.
The device approach to the bearing. Due to the bearing layout, cooperation, and the conditions of use; usually; because most of the shaft rotation; so the inner ring needs to cooperate with the cooperation. Cylindrical hole bearings; multi-use presses; or more hot-packing methods. Cone holes; Directly on the taper shaft; or with a sleeve device.
When the device is to the outer casing; usually the clearance cooperation is more; the outer ring has the interference; it is usually pressed by the press; or there is also the cold shrinking cooperation method of the cooling device. The dry ice is used as the coolant; the cold shrinking cooperation device; the air The moisture in the water will condense on the outer surface of the bearing. Therefore, the appropriate anti-rust method is required.
Damage to the bearing: usually; if the bearing is used correctly; can be used until the end of the fatigue life is stopped. However, there will be accidental premature injury; the condition that is not used. This early damage is opposite to the fatigue life; The limit of the quality of the problem or the problem. It is caused by the inconvenience of the device, the application, and the smoothness; the foreign matter invading from the outside; the research on the thermal influence of the shaft and the outer casing is not sufficient. The damage condition of the bearing is as follows: roller Bearing ferrules, rib jams; as a reason to think; lack of smoothing agent, improper, shortcomings of oil supply and drainage structure, foreign matter intrusion, bearing device error, excessive deflection of the shaft; there will be these reasons Coincidence; thus; only query bearing damage; it is difficult to know the true cause of the damage. However, if you know the bearing machinery, operating conditions, the structure around the bearing, know the situation before and after the attack; contact the bearing damage and several Causes of investigation; can avoid similar attacks.
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