1. Oscillation of one-way thrust ball bearing
Unidirectional thrust ball bearing oscillation is very sensitive to bearing damage, such as shedding, indentation, rust, crack, wear and so on will be reflected in the skf bearing oscillation measurement, therefore, by using a special bearing oscillation measuring device (frequency analyzer, etc.) can measure the size of the oscillation, through the frequency division can not infer the specific situation of the abnormal. The measured value is different because of the application conditions of bearings or the position of the sensor device, so it is necessary to analyze and compare the measured value of each machine in advance and confirm the discrimination standard.
2. one-way thrust ball bearing temperature
The temperature of one-way thrust ball bearings can generally be estimated by the temperature outside the bearing surface. If the oil hole can be used to directly measure the temperature of the bearing outer ring, it is more suitable.
Usually, the temperature of skf bearings begins to rise slowly with the working of bearings, and reaches a stable state after 1-2 hours. The normal temperature of the bearing is different due to the heat capacity, heat dissipation, speed and load of the machine. If it is smooth and the device part is suitable, the bearing temperature will rise sharply, and abnormal high temperature will occur. At this time, the work must be stopped and the necessary preventive measures must be adopted.
The thermal sensor can be used to monitor the working temperature of the bearing at any time, and realize the automatic alarm or stop when the temperature exceeds the specified value to prevent the occurrence of the burning shaft incident.
High temperature often indicates that the bearing has been in abnormal condition. High temperature is also harmful to skf bearing smootheners. Sometimes bearing overheating can be attributed to the bearing smooth agent. If the bearing is transferred for a long time at a temperature beyond 125℃, the bearing life is reduced. Causes of high temperature bearings include: lack of smooth or fire smooth, smooth agent. It contains impurities, excessive load, skf bearing ring damage, insufficient voids, and high friction caused by oil seals, etc.
Therefore, it is necessary to continuously monitor the temperature of skf bearing, whether it is to measure the bearing itself or other important parts. If the operating conditions are constant, any temperature change may indicate a fault.
The regular measurement of skf bearing temperature can be made by means of thermometers, such as digital thermometers, which can accurately measure the bearing temperature and display it in units according to the temperature of ° C or Fahrenheit.
The importance of skf bearings means that when they are damaged, the shutdown of the equipment will be formed, so this kind of bearings should be equipped with temperature detectors.
Under normal circumstances, skf bearings will have a natural temperature rise in just smooth or smooth and continue to rise for one or two days.
What is the selection process of skf bearing heater based on?
Selection basis of skf bearing heater:
First, the component of SKF bearing, usually do not exceed the maximum component of the bearing heater can heat the workpiece, otherwise it will crush the machine because the workpiece is too heavy.
Two, SKF bearing outer diameter, usually do not exceed the maximum outer diameter of the heated workpiece, but strictly speaking, as long as the value of (D-d) /2 is not greater than the size of the operation room W, that is, the bearing can be put into the heater, the general condition, the height of the bearing can not be considered, unless it is multi-column bearings and other ultra-high bearings.
3. SKF bearing inner diameter, only the bearings that can be passed through by the heating rod can be heated by the heater, only the bearing inner diameter is greater than the diagonal interval of the section of the smallest heating rod can be considered. (If the bearing is too small, it is recommended to select cold installation tools or bearing heating plates)
Four, the voltage, according to the field condition, the general bearing heater can be changed to the specified voltage according to the field requirements.
Specification: 0-250℃. The temperature at which bearings are heated mainly depends on the size of the interference between bearings and shafts. According to different bearing suppliers, the temperature at which bearings are heated is slightly different. Usually, heating bearings is strictly prohibited from exceeding 120℃, otherwise it will cause the metallographic structure of bearings to be damaged, and then lead to bearing damage.
4. Rotating heating rod or sliding heating rod. Rotating heating rod and sliding heating rod are planned to facilitate the taking of bearings from the heater.
Seven, if the heating rod does not match the length and width of the corresponding bearing, please do not force the heater, because it will make the equipment damaged or even burned.
Main performance advantages of skf bearing heater:
1. power adjustment, active demagnetization;
2. The main machine is separated from the control system to enhance the stability of the machine;
3. applied to the heating of large workpiece;
4. the bottom is equipped with roller skating convenient and flexible use.