Investigation into wear mechanisms of the bearing raceway used in bucket wheel excavators

Smolnicki, T.; Pękalski, G.; Jakubik, J.; Harnatkiewicz, P.

doi:10.1016/j.acme.2016.07.008

Cited by 15 publications

(6 citation statements)

References 3 publications

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“…The system uses a measuring sensor for vibration velocity. The most significant advantage of using such the supports (6). For the fast and accurate positioning of the bearing rings to be measured, a magnetic holder (7) is used.…”

Section: Vibration Measurementmentioning

confidence: 99%

Experimental Assessment of Influence of the Ball Bearing Raceway Curvature Ratio on the Level of Vibration

Zmarzły¹

2020

Komunikácie

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Raceway curvature ratio is a very important parameter, because its values influence the performance characteristics of rolling-element bearings, their durability and the level of generated vibrations. However, the level of generated vibrations is one of the most important operating parameters of the rolling-element bearings. Excessive vibrations generated by rolling-element bearings affect the operation of the whole mechanism. The article presents experimental studies aimed at evaluation of influence of the inner and outer raceway curvature ratios of 6304-type rolling-element bearings on generated vibrations values. The raceway curvature ratio was determined based on results of metrological measurements. For this purpose, the radii of the inner and outer raceways as well as the diameters of the balls were measured. Design and principle of operation of an innovative system for analysis of the raceway geometry of the rolling bearing rings was presented. The vibration analysis was carried out in three frequency ranges, i.e. low (50-300 Hz), medium (300-1,800 Hz) and high (1,800-10,000 Hz). Values of measured vibrations were expressed in Anderon units. The test results showed that increase in the raceway curvature ratio causes a moderate decrease in the value of the generated vibrations. The research results presented in this article will serve as a guidance to designers and manufacturers of the rolling-element bearings on how to modify the geometry of raceways and balls to obtain bearings that generate low vibration values. That is very important in car transportation.

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Section: Vibration Measurementmentioning

confidence: 99%

Experimental Assessment of Influence of the Ball Bearing Raceway Curvature Ratio on the Level of Vibration

Zmarzły¹

2020

Komunikácie

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“…Any change to the number of buckets is inevitably reflected on the mass of the whole BW steel structure. This leads to the shifting of the position of the SS CoG [51,52], which may potentially jeopardize the static stability of the SS structure, as well as its radiaxial slew bearing [53,54]. As such, from the aspect of preservation of the static stability of the BWE, it is of utmost importance to adjust the distribution of the masses of the structure in order to keep the position of the structure's CoG in accordance with the designed solution.…”

Section: The Impact Of the Mass Of The Bucket Wheel Steel Structurementioning

confidence: 99%

Tie-rods of the bucket wheel excavator slewing superstructure: A study of the eye plate stress state

Bošnjak

Zrnić

Momčilović

et al. 2020

Engineering Structures

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“…To properly formulate a diagnostic procedure, the knowledge of the wear mechanism is invaluable. Reference [35] is a case study of raceways of slewing bearings whose technical properties degrade. The study includes a microstructure analysis, while in Reference [36], stress-strain characteristics for loading conditions are obtained by means of strain gauges.…”

Section: Introductionmentioning

confidence: 99%

A Method for Monitoring the Technical Condition of Large-Scale Bearing Nodes in the Bodies of Machines Operating for Extended Periods of Time

Sokolski

Smolnicki

2021

Energies

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Failure of systems applied in machines comprising rolling and slewing bearings usually causes downtime of the entire heavy machine. The problem of failures can be aggravated by extremely difficult operating conditions, such as significant loads or a harsh environment. The entire issue inspired us to develop a method of monitoring the condition of such units. A study was carried out for six different large-scale excavators which examined strain distributions in the tested subassemblies. In order to estimate the technical condition of wheeled bogies, we used the phenomenon of strain propagation caused by the concentrated force acting in the ring girder web. Flamant theory was utilized to describe this phenomenon. Measurements were performed using strain gauges and the obtained results were compared with the FEM model. To determine whether bearing joints were in a good or bad condition, a coefficient of variation and an impulse factor were introduced as diagnostic indicators. It turned out that by evaluating these indicators, it was possible to distinguish between these two conditions. The method was successfully validated on machines that are in operation.

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Investigation into wear mechanisms of the bearing raceway used in bucket wheel excavators

Cited by 15 publications

References 3 publications

Experimental Assessment of Influence of the Ball Bearing Raceway Curvature Ratio on the Level of Vibration

Experimental Assessment of Influence of the Ball Bearing Raceway Curvature Ratio on the Level of Vibration

Tie-rods of the bucket wheel excavator slewing superstructure: A study of the eye plate stress state

A Method for Monitoring the Technical Condition of Large-Scale Bearing Nodes in the Bodies of Machines Operating for Extended Periods of Time

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