Jiaxing bearing small make up and introduce you to the bearing preload preload stiffness analysis

There is rotational, have HRB bearing ( ) Jiaxing bearing group sales co. , LTD. ( The company) Is bearing group co. , LTD. Established in jiaxing spot sales window, specializing in HRB brand bearings, facing the whole country, the existing stock 50 million yuan, covers the whole bearing, have very strong spot supply, is the group's retail sales center. ZhuanPei spindle bearing, the general should be exerted on the spindle bearing preloaded, its purpose is to improve the bearing rotating accuracy, can increase the stiffness of shaft, shaft vibration and noise control, and to prevent the sliding roller. The bearing pre-tightening and pre-tightening methods, when bearing preloaded on stiffness of the shaft have what change? The author based on the knowledge of bearing preload, and make detailed introduction. A, what is the bearing pre-tightening? Refers to the installation of bearings, bearing preload, trying to exert some pressure force between outer ring, rolling body and the contacts inside and outside the circle produce certain initial deformation, in the compression state. Second, the changes of stiffness caused by bearing pre-tightening 1, positioning preloaded and the axial stiffness of bearing inner ring after the axial fastening, bearing and bearing B respectively & delta; AoA and & delta; The displacement of the aoB eliminate the clearance between the inner ring & delta; ao。 This state was preloaded Fao. On the preloaded bearing axial load, the stiffness of the bearing, the corresponding relations between load and displacement of preloaded map, Fa: external axial load, the FaA: bearing A bear axial load, FaB: B bear axial load, bearing & delta; A: the position of the composite bearing quantity, & delta; AA: bearing A displacement, & delta; AB: bearing the displacement of B. 2, and the axial stiffness constant pressure preload preload spring stiffness compared with the bearing stiffness is usually very small, so the spring of the displacement of the straight line approximately parallel to the horizontal axis. Therefore, rigidity and constant pressure preload in advance on the axial pre-tightening force of the Fao single bearing stiffness is roughly equal. Three, summarizes the bearing pre-tightening methods on the change of stiffness of preloaded with location and constant pressure preload. In from the same amount of bearing preloaded cases, positioning preload is more effective to increase the bearing stiffness, namely when positioning preload caused by load displacement is smaller. Prestressing, locating in the process of operation, caused by the difference in temperature between shaft and bearing axial expansion amount of different, both inside and outside temperature difference caused by the radial difference of thermal expansion and rotation effect in the centrifugal force on the roller, the prestressing quantity change. And in the case of constant pressure preload, due to shaft extension spring load change is very small, so you can ignore the change of preloaded. So generally to improve the stiffness, suitable for positioning preload suits when high speed rotating with constant pressure preload. If you are more than HRB bearing the author introduces the bearing inspection and replacement of interest or have any questions, please click on the website on the right side of the online customer service or call:, you close the way of jiaxing bearing purchasing advisors. - - - - - - Editor: jiaxing bearing sourcing consultant LTD. All rights reserved, The company) Reprint please indicate the source