In order to give full play to the best condition of fag bearings, the choice of grease for cylindrical roller bearings is directly related to the stable operation of the equipment. The selection of bearing grease must be considered from the following aspects: the rust inhibitor should preferably be insoluble in water. The grease should have good adhesion, and the grease used in the fag bearing must have an anti-rust effect. And can form a layer of oil film on the surface of steel. lead to leakage. In normal operation, grease softens when machined. Grease will be thrown from the housing into the fag bearing. If the mechanical stability of the grease is not enough, the soap structure of the grease will be mechanically disintegrated during operation, resulting in the destruction of the grease and the loss of lubricating effect. During the operation of the fag bearing, the oil seal is a necessary barrier to protect the cylindrical roller bearing and the lubricant from foreign contamination. Neither debris nor moisture can penetrate into the bearing to prevent damage to it. Correct device maintenance is an important factor to maximize the service life of fag bearings. At the same time, attention must be paid to the cleanliness of bearings, the correctness of bearing selection and the selection of appropriate devices and maintenance tools. In addition, bearings must be protected from contamination and moisture, and must be properly installed and lubricated. Therefore, the design of the bearing arrangement, the condition of the oil seal, the type and lubrication cycle of the lubricant, and even the special maintenance all play the same and important role. 1. The installation and adjustment of low-noise bearings can also follow the grouping method of long-life cylindrical roller bearings, so that the fit interference size is more consistent, and the clearance of the bearing is also more consistent, and it is hoped that the fit interference should take a smaller value within the possible range. Ensure that the deformation of the bearing raceway is small so that the noise caused by the passing of the rolling elements is reduced. 2. The relationship between clearance and noise is very large. The ideal state is that the clearance value is just zero when the bearing is in the highest temperature state of operation. The methods for judging that the clearance is too large are as follows: in the static state, the axial displacement of the shaft is large, and the reciprocating amplitude is large, and large and heavy noise is emitted during operation. 3. If there is a nasty screaming sound during operation, it means that the preload of the cylindrical roller bearing is too large. The bearing has a large pre-interference and the pre-load should be slightly relaxed. If the clearance is too large, the two bearing rings can be slightly offset relative to each other in the axial direction: reducing the clearance and increasing the axial rigidity can reduce the bearing noise. 4. When the rolling element enters the no-load zone, it will slip or move left and right, which will not only increase the noise but also cause wear, and the small clearance and large axial stiffness can eliminate this phenomenon. However, the clearance should not be too small to avoid excessive temperature and shortened life. 5. Sometimes due to the large working temperature range of the main engine or the large size dispersion of the shaft and the seat hole, it is impossible to obtain a more appropriate clearance at one time. In this case, elastic constant pressure can be used for the outer ring of the cylindrical roller bearing. preload method.
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