Vibration analysis of each part of roller bearing

According to the Inr-InC(r, m) broken line of the vibration time series of the roller bearing, it can be seen that when m> mo (mo is the saturation relationship dimension), the broken lines tend to be flat with each other and gather all over, matching m =mo The slope of the parallel line on the polyline is also the estimated relationship dimension D2.

　　 Because the bearing vibration mark only means the position, the key to discuss the strong level of the vibration in the bearing shaft vibration discussion, so the bearing vibration value is taken. The relationship between the two can be calculated, and it can be seen that the relationship between the median Unid of the roller bearing vibration time series in the mathematical space and the estimated relationship dimension D2 of the phase space is, and then the bearing shaft vibration time series As the median Umid increases, the estimated relational dimension D2 decreases first and then increases, showing a trend of increasing discrete systems or non-monotonicity as a whole. Therefore, the discrete system or non-monotonicity of projection from mathematical space to phase space is the essential management mechanism of the time series of roller bearing vibration.

The assembly appearance of the roller bearing and the appearance of the matching parts, if there are bruises, rust layers, abrasion debris, sand, dust and soil, the bearing equipment is difficult and the assembly position is wrong; the second is the composition of this attachment Abrasive and wearable roller bearing work appearance affects assembly quality. Therefore, before the equipment, the appearance of the journal, the bearing housing cover hole, the inner hole of the shoulder, and the matching appearance of the butt parts such as shaft sleeves, washers, end caps, etc. must be solved, and the careful inspection shall be terminated. If there is a rust layer, it can be filed off with a fine file, polished with a fine emery cloth, and the surface of the bearing assembly and the attachments on the mating parts must be cleaned up.

Precautions for the use of roller bearings: Bearings are delicate parts, and their use must be terminated relatively carefully. No matter how high-performance bearings are used, if they are not used well, the expected high performance will not be obtained. Precautions for the use of related bearings are as follows:

　　 1. Hold the bearing and clean around. Even the small floating dust invisible to the eyes will affect the roller bearing. Therefore, it is necessary to insist on cleaning around to prevent floating dust from invading the bearing.

　　 2. Use it carefully. A violent impact on the bearing during use will cause scars and indentations, which will become the cause of the accident. In severe cases, it will crack or break, so be careful.

　　 3. Appropriate operating tools. Avoid replacing it with current tools, you need to use the right tools. Such as special sleeves, presses, etc.

　　 4. It means the corrosion of the bearing. When handling INA bearings, sweat in your hands can become the cause of rust. Be careful to operate with clean hands and wear gloves.

　　 5. It is not necessary to disassemble the packaging of the bearing before the pre-preparation work is carried out to prevent environmental pollution.

The life of the roller bearing is more sensitive to the load than to the speed. Therefore, for the multi-stage transmission shaft, if possible, it is advisable to put a large deceleration to a later stage; for the main shaft bearing, if possible, properly distribute the external load action point and The interval between the bearing fulcrums tries to reduce the load of the spindle bearing, and tries to stabilize the load on the spindle bearing, avoiding impact and vibration, which requires the shape and position of the bearing equipment to have sufficient accuracy, and the backlash and fit of the bearing. The selection is appropriate, and the precision of the bearing equipment is excellent.

　　The shaft parts of the machine tool are very main shafts. They are generally assembled with bearings or drag bearings and rotate at a high speed, which sometimes causes high heat. If this phenomenon is not removed in time, it will cause the bearing to over-temperature, and cause the temperature of the relative part of the machine tool to rise and cause thermal deformation. In severe cases, the main shaft and the tailstock will not be equal in height. This will not only affect the accuracy of the machine tool itself and the production and processing accuracy, but also Burn the bearing. The reason for the heating of the roller bearing and the cleaning method are shown in Table 1.

　　The cause of bearing heating and how to clean it

　　1. Reason: low bearing accuracy. Method: use standard precision bearings

　　2. Reason: the spindle is bent or the box hole is not centered. Method: repair the spindle or box

　　 3. Reason: The belt is too tight. Method: Adjust the belt to make it tight.

　　 4. Reason: poor smoothness Method: use standard grade smooth materials and clean them properly

　　 5. Reason: Low assembly quality Method: Develop assembly quality

　　6. Reason: the inner casing of the bearing runs the way: replace the bearing and related damaged parts

　　7. The method of large radial force: clean and adjust the gap between the sealing mouth ring and request 0.2～0.3mm, correct the diameter of the impeller equalization hole and check the static equalization value