Vibration
In normal use, vibration is quite sensitive to bearing damage, and peeling, indentation, rust, cracks, wear, etc. will be reflected in bearing vibration measurement. Therefore, the Russian car bearing china suppliers can measure the size of the vibration by using a special bearing vibration measuring device (frequency analyzer, etc.), and the specific situation of the abnormality can be inferred from the frequency distribution. The measured value differs depending on the service conditions of the bearing or the installation position of the sensor, etc., so it is necessary to analyze and compare the measured value of each machine in advance to determine the judgment standard.
Temperature
High temperature often indicates that the cylindrical roller bearing has been in an abnormal condition. High temperatures are also detrimental to bearing lubricants. Sometimes bearing overheating can be attributed to the lubricant of the bearing. If the bearing is continuously rotated at a temperature exceeding 125°C for a long time, the life of the bearing will be reduced. The causes of high temperature bearings include: insufficient lubrication or excessive lubrication, impurities in the bearing raceway, high limit speed, long-term overloading of the bearing, etc.
structure
N0000 type without ribs on the outer ring and NU0000 type without ribs on the inner ring. Cylindrical roller bearings can accept large radial loads, high limit speed, and do not restrict the axial displacement of the shaft or housing, and cannot accept axial displacement. load.
Cylindrical roller bearings NJ0000 and NF0000 with ribs on the inner and outer rings can restrain the axial displacement of the shaft or housing in one direction, and can accept small unidirectional axial loads. NU0000+HJ0000, NJ0000+HJ0000, and NUP0000 bearings can restrain the axial displacement of the shaft or housing in two directions within the axial clearance range of imported bearings, and can accept small bidirectional axial loads.