NTN bearings are precision parts, so it is required to be cautious when using them. High performance bearings are used. If they are not used properly, they can not achieve the expected performance effect. Therefore, the following matters should be paid attention to when using automobile bearings:
Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
Keep the imported bearing and its surrounding environment clean. Even if the invisible smile dust enters the bearing, it will increase the wear, vibration and noise of the imported bearing.Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
When using and installing, it shall be careful. It is not allowed to punch with force, directly knock the bearing with a hammer, and transfer pressure through the rolling body.Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing lifeEffective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
Use proper and accurate installation tools, try to use special tools, and try to avoid using cloth and short fiber.
Prevent the corrosion of imported bearings. When taking the automobile bearings directly by hand, fully wash the sweat from your hands and apply high-quality mineral oil before operation. Pay special attention to rust prevention in rainy season and summer.Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
1、 Impact of vibration on bearing.
In normal use, vibration is very sensitive to the damage of automobile bearing. Peeling, indentation, corrosion, crack and wear will be reflected in the vibration measurement of NTN bearing. Therefore, the magnitude of vibration can be measured by using a special bearing vibration meter (frequency analyzer, etc.), and the specific situation of abnormality can not be inferred through frequency division.
The measured values are different due to the service conditions of the bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
According to the different load directions, the stainless steel bearing mainly bears radial load, the bearing can bear both radial load and axial load, and the bearing mainly bears axial load.
The bearing load is the radial load acting on the shaft, and FR and FN are the radial loads acting on the bearings at both ends of the shaft respectively. Under the action of radial load, the contact between the bearing rolling element and the inner and outer rings is affected by pulsating cyclic stress, resulting in fatigue pitting corrosion.
After the bearing operates for a certain time, the bearing rolling element and the inner and outer ring raceway lose their original shape, the rotation accuracy of the shaft is reduced, the vibration and noise of the machine are increased, and finally the bearing failure is caused.Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
Under the bearing load, FR and FN are the radial load and axial load acting on the shaft respectively, FR and FN are the radial load and axial load acting on the bearing at the left end of the shaft respectively, and fa2 are the radial load and axial load acting on the bearing at the right end of the shaft respectively.
Under the action of radial load and axial load, NTN bearing not only produces fatigue pitting corrosion, but also under the action of axial load, one end of the bearing is compressed, and the stainless steel bearing at the other end is relaxed, resulting in wear on the contact surface of bearing elements at the compression end, so the failure of the bearing is accelerated.Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
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