1. In the process of using NTN bearings, regular cleaning is very important. How to accurately clean the bearing? When the bearing is removed for inspection, the appearance record shall be made by means of photography. In addition, confirm the amount of remaining lubricant and sample the lubricant before cleaning the bearing.
2. The cleaning of bearings can be divided into rough cleaning and fine cleaning, and a metal grid can be placed at the bottom of the container.
3. During rough washing, use a brush on the oil top to remove grease or adhesion. At this time, if the bearing is transferred in the oil, the rolling surface will be damaged by foreign matters.
4. During fine cleaning, the bearing shall be slowly moved and changed in the oil and shall be stopped with great efforts.
5. The cleaning agent used on weekdays is neutral water-free Ntn Bearing diesel oil or oil, and warm lye is sometimes used according to the demand. No matter what kind of cleaning agent you use, you should always filter and keep clean.
6. After cleaning, apply antirust oil or antirust grease on NTN bearing immediately.
In order to make the imported bearings serve the mechanical operation for a longer time, it is necessary to conduct regular inspection on NTN bearings.
Through the inspection, the Ntn Bearing problems caused by mechanical operation can be effectively found, the problems can be well solved, and the service life of the bearings can be effectively increased.
During the inspection, mainly Ntn Bearing observe whether the rivet head of the bearing is skewed, loose and whether the welding position is correct. The welding of cage is good or bad.
Whether the welding point is too small, the welding is not firm, or the ball clamping caused by excessive welding. They are all places that need special attention in the process of testing imported bearings. There are also some problems that need attention.
Local inspection of bearing. First of all, in terms of environment, the inspection of imported bearings should be carried out in the environment with light, which is astigmatism, so as to better observe the outside of the bearing and see that there are no cracks and other abnormalities on its surface.
For example, the wear, scratch and collision in the process of mechanical cloud will lead to the deviation of the bearing device, poor position of the device, flat Ntn Bearing load and stress concentration, and the reduction of the accuracy and service life of the modeling bearing.
In addition, the working environment also pays special attention to moisture or pollutants, which are easy to lead to bearing rust. Rust leads to poor installation and early wear of NTN bearings, and more seriously, it will lead to direct scrapping of bearings. Therefore, pay special attention to waterproof and moisture-proof in the process of use.
1. The oil bath of the bearing is smooth
Oil bath smoothing is a common smoothing method in imported Ntn Bearing bearings, which is suitable for the smoothing of low and medium speed bearings.
The IKO bearing is partially immersed in the groove, and the smooth oil is brought up by the rotating bearing parts and then flows back to the oil groove. The oil level should be slightly lower than the center of the low rolling element.
2. The oil dripping of the bearing is smooth
The quantity of oil that is suitable for the smooth bearing parts should be increased by one drop of oil per 3-8 seconds, and the oil temperature of individual parts should be increased by one drop of oil.
3. The circulating oil of the bearing is smooth
Use the oil pump to deliver the filtered oil to the bearing parts, and then filter and cool the smooth oil after passing through the IKO bearing. Because the circulating oil can take away certain heat and cool the bearing, this method is actually used for bearing parts with high speed.
4. spray smoothness of bearings
Oil mist is generated by mixing the dry shrinkage air with the smooth oil through the sprayer, and the airflow can effectively cool the bearing and avoid impurity invasion in the radial bearing. This method is suitable for the smoothing of high-speed and low-temperature bearing parts.
5. The radial of the bearing is smooth
Use the oil pump to inject the low-pressure oil into the bearing through the nozzle, and the oil injected into the bearing flows into the oil groove through the other end of the bearing. When the bearing rotates at a high speed, the rolling element and the maintenance frame also cause air flow around at a relatively high rotation speed.
It is difficult to send the smooth oil to the bearing in an individual smooth way. At this time, the smooth oil must be sprayed into the bearing in the way of low-pressure radiation, and the position of the nozzle should be placed between the inner ring and the center of the maintenance frame.
Different IKO bearing greases form different contours in the bearing. The contour must be formed, which is quite draft, the running in time is short, and the bearing temperature is low and stable in long-term operation. This is an ideal grease, so it is particularly important for the channelization of the grease.
Some so-called vortex type greases are not the case. They are not easy to form a contour. Even if the contour is formed, they are easy to collapse. At this time, the excess grease returning to the raceway repeatedly is in the condition of forced mixing for a long time.
The bearing torque is large, the temperature is high, and it is unbalanced. It may also produce noise, and the grease is easy to deteriorate and lose.
Treatment of bearing temperature rise
When the bearing temperature rises, first judge whether there is misoperation. If it does rise, the following treatment shall be carried out:
(1). Check whether the cooling water pressure, water flow and pipeline system are normal. If the water pressure is low, the filter may be blocked and cannot be handled in time, it can be shut down for treatment. When it is confirmed that it can work, it can be put into use.
(2). Check the oil pressure of the governor. If the oil pressure is low, the cooling water hydraulic valve may be closed.
(3). Check whether the bearing has abnormal sound and whether the bearing swing is abnormal.
(4). Take an oil sample to observe whether the oil color has changed, and test to see whether it has deteriorated. If the deterioration is confirmed, stop the machine and replace it with new oil.
(5). Check whether the oil level of the oil gauge is normal. If not, check whether the oil drain valve of the oil tank is tightly closed. If it has been closed tightly, oil shall be added. If it is oil leakage from the sealant pad, it shall be shut down for treatment.
When we use IKO bearings, if we find that the temperature is very high, we should stop the equipment immediately, find out the cause, and deal with it according to the solutions provided above.
However, due to the different causes of bearing heating, the solutions are also different, so we should treat it on a case by case basis and complete it with the help of technicians.