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Analytical analysis and detection methods for temperature rise of NSK bearing
Source: China Bearing Network Time: 2014-08-24
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(2). The machine side water wheel mechanical fault light plate is bright; the external temperature indicating the bearing temperature rises; signal relay measures.
(3). Thermometer disk (bulging large thermometer) black needle and yellow needle coincide or exceed the yellow needle.
(4). Announce the fault signal of the bearing temperature rise.
The reason for the increase in NSK bearing temperature is (1). The bearing cools in the water.
(2). The oil quality is deteriorated; the oil itself is not clean or the oil is degraded during work; if the water is added in the oil, the acidity of the oil will increase; the smoothing effect of the oil will be lowered; the bearing bush will be corroded; and the bearing temperature will rise.
Disposal of temperature rise of NSK bearing When the bearing temperature rises; the first discriminant can be mistaken; if it is indeed raised; the following should be done:
(1). Check the cooling water pressure; whether the water flow and the pipeline system can be normal. If the water pressure is low, it can be blocked by the filter; if it can not be disposed of in time; it can be stopped; when it is recognized that it can work;
(2). Should check the oil pressure of the governor; if the oil pressure is low, the cooling water hydraulic valve can be closed.
(3). Check if the bearing can have abnormal sound; and check whether the bearing swing can be abnormal.
(4). Take oil samples to investigate whether the oil color can be changed; and carry out tests to see if it can change. If you admit to deterioration, you should stop replacing new oil.
(5). Check if the oil level oil level is normal; if it is abnormal; check if the oil drain valve can be closed. If it is closed, it should be replenished; if it is leaking oil, it should be stopped.
When we are using NSK bearings; if it is found that the temperature is very high; then quickly stop the equipment work; then find out the reason; and according to the above-mentioned supply treatment plan; but the reason for the bearing heat is not the same So the method of processing is not the same; so it is still to be detailed in detail; with the assistance of the technical staff to complete.
At the top of the list, the oscillation conditions of NSK bearings in operation are reflected in the oscillating measurement of NSK bearings from the shedding, indentation, rust, cracks, and abrasion; NSK bearing oscillation is very sensitive to the damage of the bearing; The NSK bearing oscillating measuring device (frequency analyzer, etc.) can measure the large oscillation. U De Shi Zhi 豢 豢 鲆 鲆 鲆 5 5 5 5 5 5 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于 由于The orientation is different; it is necessary to analyze the measurement value of each machine beforehand and determine its discriminant specification.
Second, check the sound condition of the NSK bearing when it rolls over. Because the bearing has slight peeling and other damage, it will announce abnormal sounds and irregular sounds; therefore, the sounder can be used for resolution; the sounder is selected; NSK bearing tumbling sound and sound quality to view; play an early prevention effect.
Third, to see the temperature of the NSK bearing transformation, if the oil hole can be used to directly measure the outer ring temperature of the NSK bearing; then more suitable. Under normal conditions; NSK bearing temperature; usually based on the temperature outside the bearing can be estimated If it is smooth and the device is suitable, the temperature of the NSK bearing will rise sharply; abnormal temperature will occur; it is necessary to stop the work; take necessary precautions.
Usually; the temperature of the NSK bearing gradually rises with the beginning of the work; after 1-2 hours, it reaches a stable condition. The normal temperature of the NSK bearing follows the heat capacity of the machine; the heat dissipation; the speed and load are different.
Whether it is on the shaft or in the bearing seat; the rolling bearing needs to fix its orientation in three directions: radial, axial and tangential directions. The radial and tangential positioning is done through the tight cooperation of the bearing rings. However, as long as the axial positioning is selected in a small number of conditions, axial limiting parts are usually selected; for example, the end cap and the retaining ring limit the axial orientation within the clearance scale.
In the selection and cooperation of rolling bearings, we should focus on the following four considerations:
1. Rolling bearing cooperation should make the bearing device and disassembly easy and convenient; save time and labor as much as possible; save three expenses.
2. There is also that the ferrule cannot slide in the direction of the tangential direction in its cooperation appearance; avoiding damage to the cooperation surface.
3, in order to reduce the deformation degree of the NSK bearing ring; and can fully exert the bearing capacity of the bearing; the bearing ring has the best outstanding support and uniform force.
4. It is necessary to get used to the axial orientation; there is a swimming ability within a certain scale; therefore, it is necessary for the free end bearing to be compatible with the length of the shaft and the NSK bearing housing hole.
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