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Vibration of bearings
What are the main factors affecting bearing vibration? The vibration system constituted by the rigidity, flexibility, mass, damping, etc. determined by the design parameters of the bearing structure will generate vibration suitable for its mechanics under operating conditions. The vibration caused by the deviation in the manufacturing process, the smaller the deviation, the smaller the vibration. The roundness, waviness and surface roughness of the surface of the steel ball are the factors that have the greatest impact on vibration in each bearing part, followed by the shape error and surface roughness of the inner ring and outer ring channel, and the third is the bearing cleanliness and lubricant. quality etc. Operating conditions such as installation conditions, rotational speed, direction and magnitude of the axial load, etc. What are the physical quantities that characterize bearing vibration? There are three kinds of physical quantities that characterize bearing vibration: vibration displacement, vibration velocity, and vibration acceleration. Bearing vibration level and scope of application? The bearing vibration (acceleration) is divided into four grades: Z, Z1, Z2, and Z3; the bearing vibration (speed) is divided into four grades: V, V1, V2, and V3. Z and V grades are suitable for the vibration inspection of deep groove ball bearings within the scope of the standard by bearing manufacturers; Z1 and V1 grades are suitable for the inspection of bearing products with general requirements for bearing vibration; Z2 and V2 grades are suitable for Y series motors and Other motor bearings as required; Z3 and V3 grades are suitable for strict requirements on vibration. This level has the international advanced level.
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