Time-dependent reliability of spur gear system based on gradually wear process

Zhu, Lisha; Zhang, Yimin; Zhang, Rui; Zhang, Peiming

doi:10.17531/ein.2018.2.05

Cited by 11 publications

(5 citation statements)

References 21 publications

(26 reference statements)

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“…Therefore, the wear is linear during operation without consideration of changes in wear behavior due to wear-induced geometrical changes. To overcome this shortcoming, Zhu et al (2018) present a wear model taking dynamic wear changes into account. The calculation considers dynamic load distribution and time-varying stiffness, leading to a varying wear activity during the operation simulation.…”

Section: Tolerance Management Under Wear Considerationmentioning

confidence: 99%

Implementation and Interpretation of a Scrap and Failure Oriented Multi-Objective Optimization Considering Operational Wear

et al. 2023

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The tolerancing of products for manufacturing is usually performed at the end of the design process and the responsibility of the designer. Although components are commonly tolerated to ensure functionality, time-based influences, like wear, that occur during operation, are often neglected. This could result in small amounts of scrap after production, but high quantities of failure during operation. To overcome this issue, this paper presents an approach to perform a multi-objective optimization considering tolerances based on a wear simulation. Thereby, mean shifts serve as optimization variables, while the aim of the optimization is to generate an optimal ratio of scrap to failure. In addition, the optimization results are interpreted and further options for the designer are presented. Moreover, the approach is exemplary applied to a use case.

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Section: Tolerance Management Under Wear Considerationmentioning

confidence: 99%

Implementation and Interpretation of a Scrap and Failure Oriented Multi-Objective Optimization Considering Operational Wear

et al. 2023

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“…According to the wear measurement data of most metal material friction pairs under unlubricated conditions, the law of interlink wear is obtained, that is, the wear volume is proportional to the average tension F c t ð Þ and unit sliding distance DL s (t) in the time interval Dt, and inversely proportional to the hardness of the wear surface H (Zhu et al, 2018;Jayasinghe et al, 2018). As the initial wear is limited to small, only some portions of the surface are removed and a smooth contact wear surface is produced.…”

Section: Fretting Wear Processmentioning

confidence: 99%

Time-dependent reliability and optimal design of scraper chains based on fretting wear process

Zhu

Lü

et al. 2021

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Purpose This paper aims to present a dynamic reliability model of scraper chains based on the fretting wear process and propose a reasonable structural optimization method. Design/methodology/approach First, the dynamic tension of the scraper chain is modeled by considering the polygon effect of the scraper conveyor. Then, the numerical wear model of the scraper chain is established based on the tangential and radial fretting wear modes. The scraper chain wear process is introduced based on the diameter wear rate. Furthermore, the time-dependent reliability of scraper chains based on the fretting wear process is addressed by the third-moment saddlepoint approximation (TMSA) method. Finally, the scraper chain is optimized based on the reliability optimization design theory. Findings There is a correlation between the wear and the dynamic tension of the scraper conveyor. The unit sliding distance of fretting wear is affected by the dynamic tension of the scraper conveyor. The reliability estimation of the scraper chain with incomplete probability information is achieved by using the TMSA for the method needs only the first three statistical moments of the state variable. From the perspective of the chain drive system, the reliability-based optimal design of the scraper chain can effectively extend its service life and reduce its linear density. Originality/value The innovation of the work is that the physical model of the scraper chain wear is established based on the dynamic analysis of the scraper conveyor. And based on the physical model of wear, the time-dependent reliability and optimal design of scraper chains are carried out.

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“…Shearer belongs to large, heavy mining machinery, and some mines are hundreds of meters deep and the underground environment is very bad, which will inevitably make it difficult for shearer to move, flip, cut drum adjustment and so on, so its size should be reduced [7,14]. At the same time, vibration fault caused by high frequency excitation is the weak link of shearer reliability [23,26,27]. Therefore, it is of great significance to find a reasonable design method to reduce the size (mass) and high-frequency vibration of the cutting unit to reduce the occupied space and reduce its fault.…”

Section: 1backgroundmentioning

confidence: 99%

A Robust Optimization Method on the Transmission System of the Cutting Unit of Shearer

Gao

Chen

2020

Preprint

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The transmission system of the cutting unit of shearer is divided into three basic components: planetary reduction form, one gear on one shaft form and a double gears on one shaft. The dynamic differential equations of three basic components are established respectively, and the volume functions of each structure are obtained. The characteristics of the internal excitation of the transmission system are analyzed, and the solution methods of the motion parameters of each component are obtained based on the harmonic balance method. Taking the parameters such as tooth number, modulus and tooth width as optimized variables, and a robust optimization method with the minimum value of multi-parameter evaluation function weighted linearly by dimensionless volume and vibration for the transmission system of the cutting unit of shearer is presented. Taking a certain type of shearer as an example, the transmission system of the cutting unit is optimized by using the presented method. After the design, the size is reduced by 5.4%, the maximum torsional acceleration of the drum is reduced by 17.8%, and the maximum torsional acceleration of the first gear is reduced by 9.6%. The results show that the design method can reduce the manufacturing cost of shearer and reduce the failure rate of the cutting unit.

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Time-dependent reliability of spur gear system based on gradually wear process

Abstract: Time-dependenT reliabiliTy of spur gear sysTem based on gradually wear process Zależna od cZasu nieZawodność układu prZekładni ZębaTej jako funkcja procesu sTopniowego Zużycia

Cited by 11 publications

References 21 publications

Implementation and Interpretation of a Scrap and Failure Oriented Multi-Objective Optimization Considering Operational Wear

Implementation and Interpretation of a Scrap and Failure Oriented Multi-Objective Optimization Considering Operational Wear

Time-dependent reliability and optimal design of scraper chains based on fretting wear process

A Robust Optimization Method on the Transmission System of the Cutting Unit of Shearer

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