Load Distribution Calculation of a four-Point-Contact Slewing Bearing and its Experimental Verification

2018 ◽  
Vol 42 (3) ◽  
pp. 243-252 ◽  
Author(s):  
R. Liu ◽  
H. Wang ◽  
B.T. Pang ◽  
X.H. Gao ◽  
H.Y. Zong
Keyword(s):  
Experimental Verification ◽  
Load Distribution ◽  
Point Contact ◽  
Slewing Bearing ◽  
Distribution Calculation

Influence of Tooth Modifications on Load Distribution in Face-Hobbed Spiral Bevel Gears

2011 ◽  
Author(s):  
Vilmos V. Simon
Keyword(s):  
Load Distribution ◽  
Point Contact ◽  
Surface Generation ◽  
Tooth Surface ◽  
Spiral Bevel Gears ◽  
Bevel Gears ◽  
Distribution Calculation ◽  
Potential Contact ◽  
Tooth Surfaces ◽  
Spiral Bevel

In this study a novel method for load distribution calculation is applied to investigate the influence of tooth modifications on loaded tooth contact in face-hobbed spiral bevel gears. As a result of these modifications introduced to the teeth of the pinion, the gear pair becomes mismatched, and a point contact replaces the theoretical line contact. In the applied load distribution calculation it is assumed that the point contact under load is spreading over a surface along the whole or part of the “potential” contact line, which line is made up of the points of the mating tooth surfaces in which the separations of these surfaces are minimal. The separations of contacting tooth surfaces are calculated by applying the full theory of tooth surface generation in face-hobbed spiral bevel gears. A computer program was developed to implement the formulation provided above. By using this program the influence of tooth modifications introduced by the variation in machine tool settings and in head cutter profile on load and pressure distributions, transmission errors, and fillet stresses is investigated and discussed.

Load Distribution of Cross-Roller Slewing Bearing

2012 ◽  
Vol 224 ◽  
pp. 268-271 ◽  
Author(s):  
Gang Zhang ◽  
Ming Yan Li ◽  
Chang Sun ◽  
Jian Zhang ◽  
Hai Long Zhang
Keyword(s):  
Load Distribution ◽  
Reference Value ◽  
Radial Force ◽  
Slewing Bearing ◽  
Distribution Calculation ◽  
Bearing Load ◽  
Overturning Moment ◽  
Bearing Design ◽  
Bearing Structure ◽  
Slewing Bearings

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 axial force, overturning moment and radial force. Finally, based on the above formula for calculating the bearing load distribution and through the Matlab software, we analyze the influence of some parameters on the bearing load distribution. For ensuring bearing design parameter, it has the certain reference value.

Load Distribution over Raceways of an 8-Point-Contact Slewing Bearing

2010 ◽  
Vol 29-32 ◽  
pp. 10-15 ◽  
Author(s):  
Xue Hai Gao ◽  
Xiao Diao Huang ◽  
Hua Wang ◽  
Jie Chen
Keyword(s):  
Load Distribution ◽  
Axial Load ◽  
Point Contact ◽  
Dynamic Capability ◽  
Radial Load ◽  
Slewing Bearing ◽  
Bearing Design ◽  
Load Conditions

An 8-point-contact slewing bearing is usually applied with strict requirements. The load distribution over raceways is the fundament to calculate both the static and dynamic capability of a slewing bearing. The paper discussed a method for calculating the load distribution in an 8-point-contact slewing bearing under general load conditions (turnover moment, axial load and radial load). Based on the method, some suggestions were proposed for optimization of the slewing bearing design.

Experimental verification of methods for calculation of the distribution of forces in planetary pin gearboxes

2020 ◽  
pp. 12-15
Author(s):  
M.M. Ermolaev ◽  
M.N. Zakharov ◽  
YU.V. Sinitsyina
Keyword(s):  
Experimental Verification ◽  
Load Distribution ◽  
Pinion Gear

Various models are considered for calculating the forces at the areas of contact of the satellite with the pinion gears of the planetary pinion gear (PPG). The distributions of forces along the pins for each model are given and an experiment is performed to check the reliability of the analytical dependences for different models. The applicability of these models for calculating the PPG is analyzed. Keywords: planetary pinion gearbox, load distribution, experiment. [email protected]

Optimal Tooth Modifications in Hypoid Gears

2004 ◽  
Vol 127 (4) ◽  
pp. 646-655 ◽  
Author(s):  
Vilmos Simon
Keyword(s):  
Load Distribution ◽  
Angular Position ◽  
Point Contact ◽  
Tooth Surface ◽  
Gear Pair ◽  
Hypoid Gear ◽  
Tooth Contact ◽  
Hypoid Gears ◽  
Transmission Errors ◽  
Tool Profile

A method for the determination of optimal tooth modifications in hypoid gears based on improved load distribution and reduced transmission errors is presented. The modifications are introduced into the pinion tooth surface by using a cutter with bicircular profile and optimal diameter. In the optimization of tool parameters the influence of shaft misalignments of the mating members is included. As the result of these modifications a point contact of the meshed teeth surfaces appears instead of line contact; the hypoid gear pair becomes mismatched. By using the method presented in (Simon, V., 2000, “Load Distribution in Hypoid Gears,” ASME J. Mech. Des., 122, pp. 529–535) the influence of tooth modifications introduced on tooth contact and transmission errors is investigated. Based on the results that was obtained the radii and position of circular tool profile arcs and the diameter of the cutter for pinion teeth generation were optimized. By applying the optimal tool parameters, the maximum tooth contact pressure is reduced by 16.22% and the angular position error of the driven gear by 178.72%, in regard to the hypoid gear pair with a pinion manufactured by a cutter of straight-sided profile and of diameter determined by the commonly used methods.

Design of Four Contact-Point Slewing Bearing With a New Load Distribution Procedure to Account for Structural Stiffness

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Mireia Olave ◽  
Xabier Sagartzazu ◽  
Jorge Damian ◽  
Alberto Serna
Keyword(s):  
Load Distribution ◽  
Contact Point ◽  
Element Model ◽  
Contact Forces ◽  
Elastic Model ◽  
Slewing Bearing ◽  
Extreme Loads ◽  
Highly Nonlinear ◽  
Rolling Elements ◽  
Bearing Rings

This 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 rigid model. It is necessary to evaluate the effect of the elasticity on the increase in the contact forces in order to be able to design the slewing bearing and the structures involved in the connection. Depending on the shape of the structures, the contact force value obtained on the most loaded rolling element is different. The evaluation of this maximum force at extreme loads is essential to design the structures joined to the bearing rings. The new elastic model presented in this paper is highly nonlinear so iterative loops are needed in order to obtain a satisfactory solution. At the same time a finite element model (FEM) has been created for the global model, having also represented the rolling elements and their contact with the raceways. The results obtained using the FEM have been correlated with the results of the new procedure.

INERTIA PARAMETERS ESTIMATION OF PLANAR OBJECT ON ROBOT PUSHING OPERATION

2009 ◽  
Vol 06 (04) ◽  
pp. 239-247 ◽  
Author(s):  
YONG YU ◽  
TETSU ARIMA ◽  
SHOWZOW TSUJIO
Keyword(s):  
Experimental Verification ◽  
Center Of Mass ◽  
Point Contact ◽  
Parameters Estimation ◽  
Moment Of Inertia ◽  
Inertia Parameters ◽  
Angular Velocities ◽  
Unknown Object

This paper proposes a technique that can estimate the inertia parameters of a graspless unknown object, which is pushed by robot fingers. Using the fingertip different accelerations (or angular accelerations), velocities (or angular velocities) and forces information measured in pushing operations, the algorithms to estimate the object mass (or moment of inertia) are described. Then, a line called C.M. Line, is defined in this paper. The line contains the center of mass and is between two fingertips which are in point-contact with an object side. By using two or more orientation-different C.M. lines, an algorithm to estimate the center of mass of the object is given. Lastly, experimental verification on the proposed approach is performed and its results are outlined.

scholarly journals The Influence of the Geometrical Parameters for Stress Distribution in Wire Raceway Slewing Bearing

2017 ◽  
Vol 64 (3) ◽  
pp. 315-326 ◽  
Author(s):  
Dominik Gunia ◽  
Tadeusz Smolnicki
Keyword(s):  
Stress Distribution ◽  
Internal Pressure ◽  
Ball Bearing ◽  
Point Contact ◽  
Geometrical Parameters ◽  
Contact Wire ◽  
Slewing Bearing ◽  
Distribution Of Stresses

Abstract This paper presents the current study of the distribution of stresses for four-point contact wire race ball bearing. The main aim of this article is to define the most important geometrical rules in a wire-race bearing. The results for bearings of different geometrical parameters are presented. In the study, one also estimates the distribution of internal pressure in particular bearing elements.

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