Generlly affect the entire machinery noise, and reduce the the raceways sound can reduce the mechanical noise. The impact sound of the rolling body and its larger models of the control method of ball bearings or cylindrical roller bearings in the low-speed operation under pure radial load, due to the smaller centrifugal force of the rolling elements, in a non-load rolling element will be the impact of cage or raceway noises. But as the speed increases, the sound will disappear. The rolling element of impact sound control methods are: appropriate to reduce the radial clearance, the use of the rational structure of the material supple cage imported bearings.


Imports bearing the jarring sound of their control jarring sound harsh metal grinding sound cylindrical roller bearings on all occasions that may occur, in most cases took place in greased large models of imported bearings, while the deterioration in the performance of the base oil more likely to have almost no oil lubrication grease.


In addition, during the winter are more prone to prone when under pure radial load, radial clearance of the occasion, and of different size with imported bearing model, likely to occur in a particular speed range, both will Continuous again intermittent. External ring raceway to take special processing methods to prevent jarring sound, and can choose imported bearings, or appropriate to reduce the radial clearance of imported bearings, the use of the excellent performance of the grease and increase with imported bearings to match machine parts of the rigidity.


Imports of bearing fatigue life estimation method calculation methods and test Cham support two kinds of


Imports bearing fatigue life calculated according to the prescribed formula and calculation rules for calculating the fatigue life (1), calculate the total transfer value provisions to rotate the inner ring or shaft ring (in this case the total transfer value of the outer ring or seat fixed) .


(2) in the performance of bearing fatigue life test procedures in accordance with the provisions of the standard test methods, can meet the requirements of a method specified in the testing machine, fatigue life test a sample batch of imported bearings from the test data processing fatigue life of the actual trials of life, is try imported bearings on behalf of the batch of imported bearings.


Bearing fatigue life test Pi is sufficient lubrication to maximize the suppression of rolling bearings wear factors, enhanced load and speed enhanced fatigue life test methods in order to highlight the import of a bearing fatigue factors.


Imports bearing fatigue life calculation method and the fatigue life tests are complementary, both from the corresponding results.


However, in reality, such as for each specific use of the occasion, they extract a sufficient number of imports bearing life test to verify the appropriateness of the selected imported bearings, economically, on time and the amount of labor are very vast. imports of bearing life test methods just before use is necessary or important circumstances, in most cases, the standard of life calculated to estimate the life of the imported bearings, with a sufficient degree of dependence.


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