Aluminum Wire
Aluminum wiring is a type of electrical wiring for residential construction or houses that uses aluminum electrical conductors. Aluminum provides a better conductivity to weight ratio than copper, and therefore is also used for wiring power grids, including overhead power transmission lines and local power distribution lines, as well as for power wiring of some airplanes.
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/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> The main reason and solution for the abnormal rise of SKF bearing temperature The main reason and solution for the abnormal rise of SKF bearing temperature
Generally speaking, the SKF bearing will heat up after the start; after a period of time; that is, at a lower temperature (usually 10 to 40 degrees higher than the room temperature), it is in a normal state to the normal state; according to the bearing size, mode, rotation speed, Smooth method; the heat transfer conditions around the bearing change differently; at this moment, it takes about 20 minutes to several hours. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
When the bearing temperature does not reach the normal state and the abnormal temperature rises; think about the following reasons; in addition, stop quickly and adopt the necessary countermeasures.
The SKF bearing temperature is essential for adhering to the proper life of the bearing and avoiding the deterioration of the smooth oil. It is advocated: try to control the most ambition in the non-high temperature state (usually below 100 degrees).
The main cause of abnormal temperature rise is too much or too little smooth oil.
Bad bearing equipment.
The internal clearance of the bearing has passed.
Sealing equipment conflicts too much.
Smoothing agent does not match.
The creep of the cooperation surface.
When the SKF bearing temperature is high, the problem should be solved from the following aspects:
1) The amount of oil added is not appropriate, the smooth grease is too little or too much. The bearing housing should be refueled according to the demand of the operation. Sometimes the bearing will show a high temperature after the fuel is added, mainly because of excessive oiling. At this time, the appearance is temperature. Risingly, after reaching a certain point (usually about 10 ° C ~ 15 ° C higher than the normal operating temperature) will remain unchanged, and then will gradually decline.
2) The grease added to the bearing does not meet the demand or is polluted. Smooth grease is not suitable for use, it is not easy to form a uniform smooth oil film, can not reduce the internal conflict and wear of the bearing, lack of smoothness, and the bearing temperature rises. When different types of grease are mixed Chemical reactions may occur, resulting in oil enthalpy change, agglomeration, and smoothing. The contamination of the oil will also increase the bearing temperature, and the dust will fall into the process of adding grease, resulting in oil pollution, causing deterioration of the internal grease of the bearing box and damaging the bearing. The temperature rises. Therefore, suitable grease should be selected. The bearing box and bearing should be removed during maintenance. The fueling pipeline should be used for clearing. Different types of grease should not be mixed. If other types of grease are replaced, the original grease should be used first. Clean and clean; in the operation protection, add grease regularly, and the grease should be properly stored to prevent moisture and dust.
3) Cooling is not enough. Check whether the pipeline can be blocked, whether the oil inlet temperature and the return water temperature can be overrun. If the cooler is not suitable for use and the cooling effect is poor, if the demand cannot be satisfied, the new cooler should be replaced or side by side. The axial flow induced draft fan should also check the insulation of the core barrel.
4) Admit that there is no such problem, then check the alignment of the coupling and the SKF bearing. The alignment of the coupling should conform to the process specification. When the axial flow induced draft fan, hydraulic coupler, etc. are found, the operation should be considered. The equipment is subject to thermal expansion. The impeller side of the induced draft fan is heated up by the heat, and the bearing box is raised. When the hydraulic coupler is running, the temperature rises, the bearing box expands, and the bearing rises. Therefore, the timing of the motor is higher. The size of the amount of retention depends on the characteristics of the equipment and the temperature parameters in operation.
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The main reason and solution for the abnormal rise of SKF bearing temperature
Source: Bearing network time: 2017-11-07