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6204/C4 Bearing |
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6204/C3 Bearing |
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6204 Bearing |
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Bearing 204TN-Z |
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Bearing 204KA-Z |
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Bearing 0204 |
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Bearing 180204 |
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| News details |
Bearing temperature is too high on the life of the impact
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| Time：2016.11.10 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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In general, if the correct use of rolling bearings, can be used until the maximum life. Improper use can lead to premature injury. This is the relative early damage to fatigue life, which we call quality of failure or accident. More due to the installation, use, lubrication on the non-standard, or foreign invasion from the outside and so on.
The main reason is the lack of lubricants, not suitable for the oil discharge structure defects, foreign body intrusion, bearing installation error, the shaft deflection is too large, Or have the above reasons.
Therefore, only the investigation of bearing damage, it is difficult to know the real cause of injury. However, if you know the use of machinery bearings, conditions of use, bearing the surrounding structure, to understand the situation before and after the accident, combined with bearing damage and several reasons to investigate, we can prevent the recurrence of similar accidents.
Rolling bearing vibration is very sensitive to bearing damage, such as peeling, indentation, corrosion, cracks, wear and so will be reflected in the vibration measurement of rolling bearings, so by using a special bearing vibration measuring device (frequency analyzer, etc.) The size of the frequency points can not be inferred by the specific circumstances of the exception. The measured values differ depending on the conditions of use of the rolling bearing or the mounting position of the sensor. Therefore, it is necessary to determine and compare the measurement values of each machine beforehand.
Rolling bearing temperature, the general bearing room outside temperature can be speculated, you can also use the oil hole directly measure the outer ring bearing temperature, which is more accurate measurement.
In general, the temperature of the rolling bearing gradually increases with the bearing running, and reaches a steady state after 1-2 hours. The normal temperature of the rolling bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication, installation is not appropriate, the bearing temperature will rise sharply, there will be high temperature, then must stop running, check the demolition repair. Conditional can use the thermal sensor, at any time to monitor the rolling bearing operating temperature, and to achieve the temperature exceeds the specified value automatically alarm or stop running to prevent the burning shaft accident.
After rolling bearing installation, in order to check the installation is not correct, to conduct operational checks. Small machinery can be rotated by hand to determine whether rotation is smooth. Check the project mainly due to foreign objects, indentation caused by poor operation, due to poor installation, poor processing of the mounting seat torque instability, due to clearance is too small, the installation error, sealing friction caused by excessive torque and so on . If there is no abnormality, the power operation can be started.
In the shaft and bearing, the bearings require radial, axial and tangential direction of the three directions to fix its position. Radial and tangential positioning is achieved by tight fitting of the bearing rings, which are used only in a few cases; axial positioning components such as end caps and retaining rings are used to define the axial position In the clearance range.
Select the cooperation should focus on the following four points:
(1) bearing ring circumferential surface should have good support and uniform force to reduce the deformation, and can give full play to the carrying capacity of the bearing.
(2) The ferrule can not slide along the tangential direction in its mating surface, otherwise it will damage the mating surface.
(3) free-end bearings must be able to shaft and bearing seat hole length changes to adapt, that must have to adapt to the axial position in a certain range of swimming ability.
(4) must pay attention to the rolling bearing installation and removal is simple, labor-saving time and expenditure.
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