Design Of Four-Point Contact Ball Slewing Bearing For Food Machinery

Slewing bearings as large rolling bearings,widely used in construction machinery,wind power,etc.,of which four-point contact ball slewing bearings more comprehensive application,especially in some special conditions,such as: medical equipment,food machinery,with a wider Applications.Special conditions of the fourpoint contact ball slewing bearing design,analysis,application of practical use has important practical significance.Taking the slewing bearing 011.40.2480.03/P5 of a certain type filling machine as an example,the design method of the slewing bearing,the design calculation process of the four-point contact ball bearing slewing bearing,the influence analysis of the main parameters and the selection of the food grade grease A more detailed application analysis.According to the specific working conditions of the filling machine,the selection calculation is carried out first,the equivalent load,the safety factor and the contact stress are calculated,and the service life of the slewing bearing is predicted,and the safety factor is checked.Then the design calculation,the main parameters to determine(nominal height T,ball center diameter Dpw,ball diameter Dw,steel ball Z,rated static load Coa),the design of inner and outer ring(groove radius of curvature,The design of the cage,the design of the plug,the selection of the parameters of the hole,the selection of the parameters of the oil hole,the selection of the sealing groove size,the use of "slewing bearing",the design of the contact hole,the design of the hole,Analysis system "to check to meet the design requirements,and use the load curve to draw the system output bearing curve.The influence of the bearing radius on the bearing capacity of the slewing bearing is analyzed.The bearing stiffness decreases with the increase of the clearance.The appropriate negative clearance can reduce the overall deformation and bearing capacity of the bearing.Contact angle,reduce the radius of the channel radius,can improve the bearing capacity.Finally,the performance and selection method of the food grade grease of the four-point contact ball slewing bearing are analyzed and studied.The design of the special conditions of four-point contact ball slewing bearing design,application has a certain reference,especially for food machinery bearings design,grease selection,safety considerations have reference significance.