Japan INA bearings in operation how to check failures and prevent measures

1. First is based on the voice of the rolling bearing to identify and check we can use acoustic measurement device, the size of Japan's INA bearings rolling sound in operation and sound quality for inspection. Because bearing even slightly stripping damage, such as would an exception and irregular, and therefore with the sound of the measuring device to identify, have the effect of prevention in advance. 2. Second bearing vibration in the operation to identify check bearing vibration is very sensitive to bearing damage. Such as peeling, indentation, rust, crack and wear will be reflected in Japan's INA bearing vibration measurement, therefore, through the use of special bearing vibration tester ( Frequency analyzer, etc. ) Can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. Measured values of bearing or sensor installation position and different using conditions, thus requiring prior to each machine is analyzed by the measured value of the determined after judgment standard. 3. Finally according to the temperature of the bearing to check the temperature of bearing, generally can be deduced according to the bearing on the surface of the outdoor temperature, if using the oil hole can directly measure temperature of bearing outer ring, is more appropriate. Usually, Japanese INA bearing temperature with operation began to slowly rise, 1 - After 2 hours to reach steady state. The normal temperature of bearing for machine heat capacity, heat dissipating capacity, rotational speed and load. If the appropriate lubrication, installation department, the bearing temperature will rise sharply, appear unusually high temperature, must stop at this moment, take the necessary precautions. Based on a lot of test data, table 4 - 1 lists the various kinds of mechanical bearing outer temperature averages at work, for your reference. Due to temperature lubrication, rotational speed, load, the influence of environment, the temperature range of values in the table only said roughly. Using thermal device can monitor the bearing temperature at any time, and realize e. automatic alarm when the temperature is more than the household or stop to prevent the shaft accidents. Bearing clearance should proper, too big impact, is too small, poor lubrication is likely to cause it to further deteriorate. Surface quality of the bearing and shaft neck and geometry must be strictly guaranteed. Improve the quality of the bearing lubrication, control the pressure, temperature, strengthen the cleaning and filtration. Use of lubricating oil for lubrication. 1. Reasonable use of cooling method: metal cooling process after quenching effect on the deformation is also important a reason. Hot oil quenching oil quenching than cold deformation is small, general control in the 100-20 ℃. Oil cooling ability of deformation is also very important. The mixing way and speed of the quenching influence the deformation. The faster the cooling rate of metal heat treatment, the uneven cooling, the stress, the greater the mould Japan INA bearings of shape. Under the premise of can ensure that the mold hardness requirements, as far as possible use precooling; Using hierarchical cooling quenching can significantly reduce the metal thermal stress and organization stress formed during quenching, is the effective method to reduce some of the more complex shape workpiece deformation; For some special complex or higher accuracy of workpiece, using isothermal quenching can significantly reduce the deformation. 2. Use appropriate medium: on the premise of guarantee the same hardness requirements, as far as possible the oily medium, experiment and practice has proved that to other conditions under the premise of no difference, the slower cooling rate of oily medium, and the cooling speed of water medium is relatively fast. And compared with those of oily medium temperature change on the influences of aqueous medium cooling characteristics, under the condition of the same heat treatment, relatively oily medium aqueous medium bearing after quenching deformation is relatively small. 3. Parts structure to be reasonable: metal during cooling after heat treatment, is always the thin part soon cold, the thick part of the cold slowly. In meet the need of actual production situation, we should try to reduce the workpiece thickness disparity, parts of section to uniform, to reduce the transition region due to stress concentration produce distortion and cracking tendency; Artifacts should keep the structure and material composition and microstructure of symmetry, in order to reduce the distortion caused by uneven cooling. Artifacts should try to avoid sharp edges, grooves, etc. , in addition, the thickness of the workpiece on the border, the steps to place with rounded transition; As far as possible to reduce the workpiece hole and slot on the reinforcement structural asymmetry; Adopt the method of reserve was uneven thickness of parts.