dynamic behavior of ball bearings under axial vibration

Analyze bearing problems by ball path inspection

2020-7-11Failure analysis of a component such as a rolling element bearing requires collecting specific operating data nd a precise interpretation of the visual evidence of failure Close examination of the contact surface of ball path which the rolling elements inscribe on the inner and outer raceways of

US4128278A

A linear motion ball bearing assembly is provided for mounting within a housing and comprises a plurality of ball retainer members with a raceway therein With the members surrounding a shaft a load bearing plate is associated with the load bearing portion of each raceway and on the outer periphery of each raceway an elastomeric strip of material is mounted to resiliently restrain the

Model Correlation of Dynamic Nonlinear Bearing

2012-12-5Under dynamic and vibration loading the bearings will support both axial and radial loads in addition to the nominal belt load reactions The non-linearity in the ball bearing can be explained in a simplified manner by examining Figure 10 which shows a single ball in a cross section view In order to explain the fundamentals assume that all of

Dynamic model of ball bearings with internal

In this paper a general dynamic model is presented for studying the dynamic properties of rotor system supported by ball bearings under the effects of both internal clearance and bearing running surface waviness The ball bearing model includes the high-speed effects of ball centrifugal force and gyroscopic moment The cage speed is considered a time-variation parameter related with the

Detection of CH

2013-10-10axial unidirectional ball bearings (QIBR 7208BWG) separated by the examined spacers (static internal spacer and dynamic external spacer) The bearings are tightly set into aluminum cups Pressure simulating the spacers axial load is applied by tightening the cups screws forcing the two outer races onto the spacer

Improved model of a ball bearing for the simulation of

2017-5-19vibration frequencies of rolling bearings and the amplitudes of the signi cant frequency components due to localised defects on the outer race the inner race or on one rolling element under an axial load They extended the model further in [4] where a rotor-bearing system was modelled as a 3 DOF system and the

[4]NELIAS D SAINSOT P FLAMAND L Power loss of gearbox ball bearing under axial and radial loads[J] Tribology Transactionss 1994 37(1):83-90 [5]YOSHIDA T TOZAKI Y MIYAKE H et al Analysis of cage slip in cylindrical roller bearings considering non-Newtonian behavior and temperature rise of lubricating oil[J] Journal of Japanese Society of Tribologists 2008 53(11):752-761

Model Correlation of Dynamic Nonlinear Bearing

2012-12-5Under dynamic and vibration loading the bearings will support both axial and radial loads in addition to the nominal belt load reactions The non-linearity in the ball bearing can be explained in a simplified manner by examining Figure 10 which shows a single ball in a cross section view In order to explain the fundamentals assume that all of

Understanding and Using Dynamic Stiffness – A Tutorial

2017-7-7Dynamic Stiffness are really no more difficult than those involved in basic machinery balancing In short this tutorial focuses on a simple practical explanation of Dynamic Stiffness that anyone concerned with machinery behavior will find useful and applicable [Editor's Note: This tutorial requires familiarity with vector

New analysis model for rotor

Fig 3 Deformation of the annular plate under (a) axial load and (b) radial load G Meng S Yi On the non-linear dynamic behavior of a rotor-bearing system Journal of Sound and Vibration 2004 274(3–5): 1031 A general theory for elastically constrained ball and radial roller bearings under arbitrary load and speed conditions

Modeling and Dynamic Analysis of Spherical Roller

Since spherical roller bearings can carry high load in both axial and radial direction they are increasingly used in industrial machineries and it is becoming important to understand the dynamic behavior of SRBs especially when they are affected by internal imperfections This paper introduces a dynamic model for an SRB that includes an inner and outer race surface defect

Dynamic Analysis of Aero

2019-7-23derived ball bearing dynamic characteristics The effects of bearing clearances were analyzed by Childs [1] Saito [2] studied the response of unbalance nonlinearity of the Jeffcott rotor bearing system with bearing radial clearances Akturk t al e [3] investigated rigid rotor shaft supported over ball bearings under radial and axial and

Dynamic characteristics analysis of a misaligned rotor

In this paper a dynamic model is established for a two-stage rotor system connected by a gear coupling and supported on ball bearings with squeeze film dampers (SFDs) The nonlinear dynamic behavior of the rotor system is studied under misalignment fault condition The meshing force of the gear coupling is calculated considering the deformation of the tooth caused by torque transmission and

New analysis model for rotor

Fig 3 Deformation of the annular plate under (a) axial load and (b) radial load G Meng S Yi On the non-linear dynamic behavior of a rotor-bearing system Journal of Sound and Vibration 2004 274(3–5): 1031 A general theory for elastically constrained ball and radial roller bearings under arbitrary load and speed conditions

Research Article Dynamics Analysis of Unbalanced

2018-12-6dynamic properties of unbalanced machine tool motorized spindle systems With the low-friction and the convenience in commodity standardization ball bearings are widely used in high speed motorized spindles [] Bearing clearance concerns the contact state between the balls and the inner and outer rings and a ects the vibration response of the

1537 Study on nonlinear dynamic of ball bearing

disk offset and disk swing vibration on the dynamic of ball bearing-rotor system In this paper a new dynamic model with eight-degree-of-freedom (8DOF) of an offset disk rotor system supported on ball bearings is set up by introducing disk offset parameters The numerical integration methods are used to solve the nonlinear differential equations

Simulation of dynamic behavior of rolling bearings

2020-7-8The understanding of the dynamic behavior of rolling bearings has not reached the same level of maturity Yet most phenomena that occur in rolling bearings both under normal and unacceptable operations are dynamic by nature These dynamic phenomena need to be studied using dynamic tools

Lubricants

Ball bearings are commonly used in high speed turbomachinery and have a critical influence on the rotordynamic behavior Therefore a simulation model of the bearing to predict the dynamic influence is essential The presented model is a further step to develop an accurate and efficient characterization of the ball bearing's rotor dynamic parameters such as stiffness and deflections as well

ANALYSIS OF DISTRIBUTED DEFECT ON OUTER RING OF

2019-1-22bearing Figure 1 depicts the schematic diagram of ball bearings which shows the various elements of bearing During modeling it is assumed that the outer ring of the bearing is rigidly fixed Hertzian contact theory is used to determine elastic deformation between ball and rings considering the behavior of the ball to be nonlinear

Nonlinear dynamic model for skidding behavior of

2015-10-13A three-dimensional nonlinear dynamic model is proposed to predict the skidding behavior of angular contact ball bearings under combined load condition The centrifugal and gyroscopic effects induced by ball rotation and revolution Hertz contact between the ball and inner/outer races discontinuous contact between the ball and cage and

Dynamic stiffness analysis for motorized

According to structural characteristics of high-speed motorized spindles an analysis model for dynamic stiffness of angular contact ball bearings taking the effects of bending deformation of inner ring into account was set up by using mechanics of elasticity and

ANALYSIS STATIC AND DYNAMIC BEHAVIOR OF

2016-6-27the force in bearings On the other hand dynamic analysis is made with aim to analyze the dynamic behavior for what is used modal analysis to determinate natural frequencies and mode shapes as well as harmonic analysis to determine the response of certain nodes at the effect of the load Both analyzes are carried out using the finite element

Effect Of Bearing Faults On Dynamic Behavior And Electric

2017-12-21Effect Of Bearing Faults On Dynamic Behavior And Electric Rolling element bearings are manufactured under very stringent quality control standards Under ideal operating conditions bearing can last through many years of hand the vibration level measured in the axial direction of the damaged bearing was about 1 9

Research Article Analytical Modeling of a Ball Screw Feed

2018-12-29Dynamic Model A BSFSS considered here is shown in Figure e spindle is xed on the feeding carriage e feeding carriage driven by the ball screw is mounted on the machine base through a pair of linear guides e ball screwissupportedbyballbearings Atthele end two angular contact ball bearings are mounted back to back to sustain the axial and

Dynamic Behavior of Ball Bearings under Axial Vibration

2018-5-25Dynamic Behavior of Ball Bearings under Axial Vibration Virgil Hinque* and Ren Seiler* Abstract The paper addresses the dynamics of ball bearings when exposed to vibration loads along their axis of rotation Following common practice in space mechanisms design the bearings are mounted in either hard preloaded or soft preloaded pairs

Research Article Modeling and Dynamic Analysis of

2019-7-30piecewise function to evaluate the vibration behavior of a of ball bearings Behzad et al [] introduced a new model to estimate the vibration which originates from faulty roller bearings ey showed that when a defect grows in the bear- location on dynamic behavior of rotor-bearing system e introduced mathematical model is veried by

Research Article Chaotic Dynamics of Cage Behavior in a

2019-7-30dynamic behavior considering details of geometric parameters and applicable conditions of rolling bearings Akt urketal []andUpadhyayetal [ ]presentedtheoretical investigationsofvaryingpreload thein uenceofthenumber of the balls and ball diameters on vibration characteristics of a rotor bearing system Akt urk [] and Harsha et al