【 Jiaxing bearing common sense 】 The failure reasons of supporting roller bearing is analysed

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. A, supporting roller bearing damage reason analysis of tandem mill roll radial supporting roller bearings with cylindrical roller bearing, rolling process, the effect on the working roller and supporting roller axial force, respectively, by the work roll bearings and back-up roller thrust bearing, the main reason of abnormal supporting roller bearing damage is axial force is too large, causing the axial positioning locking plate damage. 1, axial force causes the common four roll strip mill, ideally, can think of no axial force, PC mill because of the cross roll system, in the process of PC in itself will produce a part of the axial force and so on PC mill supporting roller selection is considered part of the axial force, also due to mill manufacturing and assembling error, raw material with transverse thickness error, mill using relevant parts wear and deformation in the process of a series of factors such as the role of the mill will inevitably produce axial force. 2, the main axial force generated factors due to the distance between the roll is produced, in the process of rolling, supporting roller is always rely on tight entrance on one side of the memorial arch, work roll on export on one side of the memorial arch. Analysis of site condition, resulting in search for the cause of support roller large axial channeling force, found a PC running wide cross head position, due to lines to work roller and support roller is not parallel, two roller line produce certain Angle. The work roll surface linear velocity along the axis of the supporting roller and axis vertical decomposition, the income of Vb is equal to the linear velocity on the surface of the support roller Vb, Vb = Vwcosa = Vb1 also got the component in supporting roller line of Vw Vwc for Vwc = Vwsina. In the process of rolling, roll system under the effect of rolling force P, two roller contact surface is - Ribbon, on this ribbon, two roll along the axis of the supporting roller has a relative sliding speed Vwe, according to the theory of friction can be know: supporting roller is bound to give work roll a and Vwc in the opposite direction of the effect of sliding friction, which itself was a and Vwc direction at the same time instead of sliding friction role, namely, the axial force produced by crossing Angle. Three axial force and other factors in addition to the axial force caused by the axis is not parallel, the following factors also can produce axial force: A) Roll caused work roller and back-up roller cone axis angular velocity is different at both ends and make cross; B) Arch with roller assembly; C) Support roller friction coefficient increase or both ends of the oil film bearing oil film bearing lubrication conditions; D) Universal shaft obliquity caused by the horizontal component of the work roll shaft head suffered but these force and roll system axis of cross compared the friction effect is very small. If you are interested in the above HRB bearing the author introduces the information 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