load distribution in a four contact-point slewing bearing

Design of Four Contact

Jan 26 2010This paper proposes a procedure for obtaining the load distribution in a four contact-point slewing bearing considering the effect of the structure's elasticity The uneven stiffness of the rings and the supporting structures creates a variation with respect to the results obtained with a

General Technical Information Slewing Bearings rev2

General Technical Information Slewing Bearings SUPPORT STRUCTURES Design of the Support Structure The slewing ring has a limited axial stiffness: the diameter is large compared to the cross section It must be mounted on a machined supporting base ensuring sufficient stiffness with regard to the loads to be transferred

A new computational model of large three

In order to improve the computational efficiency of load distribution of large three-row roller slewing bearing a new computational model using nonlinear springs is presented in this paper In this model each roller is simulated by a group of nonlinear springs which has the same load-deformation performance with solid roller–raceway contacts

Technical basics on calculation of the frictional torque

F r = radial load [kN] M k = resulting tilting torque [kNm] D L = bearing circumference- [m] = coefficient of friction ω = angular velocity ω = (π n) / 30 [s-1] n = rotational speed of the slewing bearing [min-1] η = efficiency of the drive Different coefficients of friction = 0 008 for KD 210 series range (model 13 and 21

load distribution in a four point contact slewing bearing

load distribution in a four point contact slewing bearing Views: 50 Author:ethan zhang Publish Time: 2018-07-20 Origin: Site The single row four point contact ball slewing bearing is composed of two seat rings which design in compact structure and light weight steel ball contact with the circular raceway at four point it can bear the axial

Slewing bearings

and load distribution in slewing bearings when subjected to axial radial and moment loads are shown in figs 2 to 5 Slewing bearings perform extremely well in a variety of applications such as: access platforms bucket wheel excavators conveyor booms cranes of all types

Load distribution in a four contact

This article describes the procedure established for determining the load distributions in the rolling elements of a four contact-point slewing bearing [1] with one row of ball bearings under general load conditions (moment axial load and radial load) where the e?ect of the bearing

Load Analysis of pitch bearing considering non

The pitch bearing of the MW-class wind turbine has a weak zone which is not quenched In the complicated service environment of the wind turbine the pitch bearing often has breakage accidents in the non-quenching zone Firstly this paper takes the pitch bearing as the object and establishes the pitch bearing model with weak zone Subsequently the load variation law of the pitch bearing

Load distribution and friction torque in four

Jul 01 2019Fig 1 shows the external loads acting on the slewing bearing: axial load radial load and tilting moment The load distribution problem seeks to find how these applied loads are distributed among the different rolling elements in order to verify that a particular bearing fulfils the design requirements in terms of load carrying capacity and structural stiffness

Slewing Rings (Turntable Bearings) Technical Information

Load Capability Silverthin™ Slewing Ring Bearings are designed to accommodate significant radial thrust and moment loads as shown below: This is accomplished in most cases by the unique four point contact raceway geometry which is similar in concept to Silverthin™ X-Type Thin Section bearings

The importance of slewing ring bearing maintenance in

Slewing ring bearing life is calculated assuming infinitely rigid and flat mounting structures A structure that distorts significantly under load and/or one that is out-of-flat applies loads to localized areas rather than evenly distributing them

Slewing Rings (Turntable Bearings) Load Curves

Distribution Company Contact Inside Sales NOTE: The load curves in this section reflect a generic curve for both the STO and STE Series Slewing Ring bearings The load capacities for the STO Series is actually slightly greater than is shown in the curves in this section As noted earlier in the Service Factor section of this catalog if the

Slewing Rings (Turntable Bearings) Load Curves

Distribution Company Contact Inside Sales NOTE: The load curves in this section reflect a generic curve for both the STO and STE Series Slewing Ring bearings The load capacities for the STO Series is actually slightly greater than is shown in the curves in this section As noted earlier in the Service Factor section of this catalog if the

Slewing rings for industrial customers

Slewing rings are large diameter antifriction bearings for the simultaneous transmission of axial and radial forces as well as tilting moments They replace traditional solutions with fixed and floating bearings as well as king pin bearings Frequently this results in bearings with axial/radial bearing combinations with one bearing point

GWJ: Rolling Bearing Calculation ISO/TS 16281

The load distribution in a set of bearings Single Bearing Under Tilting Moment Slewing rings with four point bearings The configuration with one or two row four point bearings can be analyzed using the software Important results are the contact stresses the friction torque and the shear stress below the surface to determine the

Slewing bearings

and load distribution in slewing bearings when subjected to axial radial and moment loads are shown in figs 2 to 5 Slewing bearings perform extremely well in a variety of applications such as: access platforms bucket wheel excavators conveyor booms cranes of all types

Internal Loading Distribution in Statically Loaded Ball

4 Static Load Distribution under Eccentric Thrust Load Methods to calculate distribution of load among the balls and rollers of rolling bearings statically loaded can be found in various papers [5 17] The methods have been limited to at most three degrees of freedom in loading and demand the solution of a simultaneous nonlinear system of

Bearing internal load distribution and displacement

Bearing internal load distribution and displacement 5 1 Bearing internal load distribution This section will begin by examing the effect of a radial load F r and an axial load F a applied on a single-row bearing with a contact angle a (angular contact ball bearings tapered roller bearings etc )

Four point contact bearings for greater accuracy

Kaydon Bearings offers a wide selection of standard and custom four-point contact ball bearings including: more than 130 standard Reali-Sllim Type X thin section bearings in bore sizes from 1 to 40 (25 mm to 1 m) five series (RK HS HT MT and XT) of slewing ring bearings geared and non-geared in O D 's from 4 to 218 (100 mm to 5 5 m)

General static load capacity in four contact point slewing

and M for four-contact-point slewing bearings This representation can be used directly to determine whether or not a given load combination is acceptable Figure 1: Loads acting on a slewing bearing Figure 2: Moment–axial-force diagram for a four-contact-point slewing bearing

Four

Four-point contact ball bearings are radial single row angular contact ball bearings with raceways that are designed to support axial loads in both directions For a given axial load a limited radial load can also be supported The bearings are separable i e the outer ring with ball and cage assembly can be mounted separately from the two

Multibody dynamics simulation of thin

Oct 02 2019The static load distribution and cage's angular velocity of simulation model are verified by the theoretical values The motion trajectory of outer ring's center is circular with a whirling motion The sphere-to-partial torus surface contacts (ball–racetrack contact) are always four contact points in the load zone of the bearing

Selection – Slewing ring bearings turntable bearings

Load capacity curve of the slewing bearing In the product samples of our company a load curve graph corresponding to each model of slewing bearing has been provided which can help you choose slewing bearing prelin1inarily There are two kinds of curves in the graph one is the max load that the slewing bearing can bear while keeping static

Contact Stress Analysis on a Large

The analysis method on contact stresses between balls and inner/outer ring raceways of a large-sized four contact-point slewing bearing with negative axial play was present The contact stresses and contact areas between balls and inner/outer ring raceways of a slewing bearing were computed at different negative axial plays without applied load

Load Distribution of Cross

Because of cross roller-slewing bearing structure have a certain degree of particularity and two sets of cross rollers is equivalent to two columns roller stack situation therefore it should deduce roller calculation formula for two sets of roller respectively According to the stress of the slewing bearings we proceed load distribution calculation synthetically under the center of bearing

Bearing internal load distribution and displacement

Bearing internal load distribution and displacement 5 1 Bearing internal load distribution This section will begin by examing the effect of a radial load F r and an axial load F a applied on a single-row bearing with a contact angle a (angular contact ball bearings tapered roller bearings etc )

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[2] Amasorrain J I Sagartzazu X Damin J Load Distri-bution in a Four Contact - point Slewing Bearing [J] Mechanism and Machine Theory 2003 38: 479 - 496 [3] Zupan S Prebil I Carrying Angle and Carrying Capacity of a Large Single Row Ball Bearing as a Function of Geometry Parameters of the Rolling Contact and Supporting Structure

Load Distribution Calculation of a four

Jan 25 2018Analysis of the load distribution along raceways is fundamental for assessing dynamic and static capacity of the slewing bearings In the literature several finite element (FE) models have been proposed to estimate the load distribution and the deformation of slewing bearing Although FE simulations are a useful tool for designers there are a few experimental studies assessing accuracy

Accounting for Moment Loads with Thin

Sep 07 2015These "X-Type" bearings distribute the load at four points of contact as shown in Figure 3 When compared to the conventional radial ball bearing raceway with only two points of contact pictured in Figure 4 it is clear to see the difference in load distribution An "X-Type" bearing can handle all three types of applied loads