Bearing large or have abnormal noise

Bearing noise refers to its value more than the required standard, abnormal noise refers to some abnormal noise of intermittent or continuous, such as 'buzzing' sound, 'kaka' sound, such as the measuring value may not exceed the prescribed standard values, but let a person feel very uncomfortable, and sometimes may further expand and cause the damage to the equipment ( Phase or into foreign body rub between parts, for example, caused by the abnormal noise, etc. ) 。 Bearing of large noise or abnormal noise phenomenon and the reasons are as follows: the phenomenon of a, relatively homogeneous continuous sound, the sound is not high friction cause analysis: 1) Grease reduced as a result, use the time is too long to reduce lubrication 2) Grease is incompatible with grease, reduce the lubrication effect 3) Nonmetal seal and bearing inner ring or outer ring friction 4) Caused by installation or related dimension problem, bearing inner and outer ring axial displacement, make the ball roll on both sides of the raceway, increases the frictional resistance phenomenon, relatively homogeneous continuous, high frequency sound, sharp friction cause analysis: 1) Grease into the dust, especially the grains of sand and metal particles. 2) The inner ring or outer ring raceway wear after rough 3) Bearing radial clearance is small. Selected for the reasons are: (1) the bearing radial clearance of small diameter greater than the specified value, (2) shaft bearing retainer is make bearing cabinet has been enlarged (3) bearing chamber diameter less than the prescribed value, make the bearing outer ring was crowded little 4) Bearing inner ring and shaft with loose, causing friction between inner ring and shaft 5) Loose of bearing outer ring and bearing chamber, the outer ring, friction bearing chamber 6) Metal seal and bearing inner ring or outer ring friction phenomenon of three, sharp grinding reason analysis: 1) Individual ball or roller broken 2) Maintains a broken 3) Four bearing inner ring or outer ring damaged phenomenon, interval timing 'giggle' or 'kaka' sound, as a continuation of the operation time, will shrink and disappear gradually cause analysis: generally occur in the new machines or all replace new bearing, grease, early runtime. Because the grease is not evenly distributed within the bearing cavity, was wrapped in one of the air extruding blasting during operation, a 'giggle' or 'kaka' sound. Five, intermittent but according to certain cycle 'kaka' sound, as a continuation of the operation time, sound grow bigger cause analysis: in the process of transportation, because turbulence when rotor vibration up and down, the lower part of the bearing ball or roller knocking bearing outer ring raceway, serious when in creasing. Bearing during operation, in creasing impeded, the issue of the 'kaka' sound cycle of rotating speed, and with friction aggravating, the sound will be more and more phenomena of six, 'buzzing' sound, low frequency analysis of the causes: 1) Poor bearing inner and outer ring coaxial degree of 2) Because of the small size of the radial bearing chamber or for poor, 3) make the bearing outer ring is squashed deformation Poor bearing housing and bearing alignment. Common reasons are: (1) parts processing caused by poor alignment (2) with uneven when assembling the bearing force of cold pressing method, make the bearing deflection, caused by poor alignment