Slewing bearing

About: Slewing bearing is a research topic. Over the lifetime, 1498 publications have been published within this topic receiving 5309 citations.

The Finite Element Analysis on High Duty Bolted Joints of Slewing Bearing

Abstract: By reasonable assumption and considering the friction, contact, preload intensity, load eccentricity, bolt bending, and other nonlinear factors, we establish three-dimensional finite element model for the high duty bolted joint to reflect the bolt behavior and develop the finite element calculation method for static strength, fatigue strength and related stresses of bolt. By this method, we do numerous numerical simulation experiments to study the effects of preload intensity, support plate thickness on the bolt behavior. These results will guide designer to complete the slewing bearing design effectively and accurately, and these research ideas can be well applied to bolted joints study in other devices.

Slewing bearing and slewing device for engineering machinery

Abstract: The utility model discloses a slewing bearing which comprises an outer ring (11) which is provided with meshing teeth, an inner ring (12) and a rolling piece (13) which is arranged between the outer ring (11) and the inner ring (12). A through hole (11a) is formed in the outer ring (11). The through hole (11a) penetrates through the outer ring (11) along the height direction of the outer ring (11), wherein the upper end face of the through hole (11a) is lower than the upper end face of the outer ring (11). The utility model further discloses a slewing device for engineering machinery wherein the slewing device comprises the slewing bearing. The installing face of a bolt of the slewing bearing is low, and therefore the head portion of the bolt can not be interfered with a slewing platform when the outer ring of the slewing bearing is installed on a car frame through the bolt.

Multi-degree of freedom dynamic stage

Abstract: The utility model discloses a multi-degree of freedom dynamic stage and relates to a stage used for performance. The multi-degree of freedom dynamic stage is provided with lifting hydraulic cylinders; lifting frames are arranged on piston rods; the upper end faces of the lifting frames are respectively hinged to a turning frame and a turning hydraulic cylinder by a turning hinge seat and a turning hydraulic cylinder hinge seat; a piston rod of the turning hydraulic cylinder is hinged to the turning frame; the turning frame is connected with a performance platform by a slewing bearing; a rotating motor which is matched with the slewing bearing is arranged on the turning frame; positioning cylinders are uniformly distributed on the lower side of the surface of the performance platform; piston inlet/outlet holes, a hydraulic state, a gas source and a controller are formed in the surface of the performance platform; the hydraulic station is connected with the lifting hydraulic cylinders and the turning hydraulic cylinder by the controller; the gas source is connected with the positioning hydraulic cylinders by the controller. According to the multi-degree of freedom dynamic stage, the lifting action, the horizontal rotating action and the overturning action can be made at any time according to the requirements of a performance so as to match with the show of actors, the performance forms are various, the literature is combined with the acrobatics, the performance is diversified, and the ornamental value is greatly enhanced.

Formula that flows afterbody feed chain bulk cargo machine of stowing

Abstract: The utility model discloses a formula that flows afterbody feed chain bulk cargo machine of stowing, the automobile body assembly contacts with ground as the supporting body of complete machine, and on the rotating platform's that foldable band conveyer installed at car rear end the foldable band conveyer free bearing, rotation mechanism's rotating platform passes through slewing bearing and installs on the slewing bearing drum of automobile body assembly afterbody. Promotion commentaries on classics material device passes through frame connection free bearing to be connected at automobile body assembly afterbody, and the receiving device rigid coupling is in the bottom of the conveyor supporting rack of promotion commentaries on classics material device, and level commentaries on classics material device rigid coupling is on the frame of promotion commentaries on classics material device. Be applicable to the bulk cargo bank high with shipment, loading, the tipper auxiliary assembly such as platform that need not to unload can directly be unloaded to receiving device, the complete machine can turn round and stow the not material of co -altitude simultaneously, has compact structure, transition flexibility, stows height -adjustable's characteristics.

Influence of Radial Forces on Change of Friction Torque in Twin Slewing Bearing

Abstract: A method of numerical conduct research of phenomena which occur in slewing bearing has been presented in the paper The basic problems concerning technical peculiarity of slewing bearing were defined The object of the analysis was twin slewing bearing for which a model of contact zone ball-raceway was developed Results of calculations which are presented in the paper were obtained by using a model of twin slewing bearing described in a separate publication Nascent conditions of rolling resistance in slewing bearing were specified The paper presents importance of radial forces as a component of the external load of slewing bearing The results of numerical analysis of changing friction torque of twin slewing bearing caused by external load were submitted In especially action of radial forces on the slewing bearing has been taken into account The values of fraction torque were shown on the background of static limiting load curve for the slewing bearing which was considered The original numeric method was used to determine the fraction torque for slewing bearing Calculations were performed by using the finite element method, ADINA program, analytical Eschmann formulas and classical mechanics equations