Service life extension for rock cutters by increasing wear resistance of holders by thermomechanical treatment

Bolobov, V. I.; Chupin, S. A.; Bochkov, V. S.; Mishin, I. I.

doi:10.17580/gzh.2019.05.13

Cited by 9 publications

(7 citation statements)

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“…Next, we observe recovery processes with a forecast of stable growth. We examined the reasons for this decline and the reasons for optimism regarding the recovery dynamics of the market [13][14][15][16][17][18]. The main reasons for the fall in the bakery market are: 1.…”

Section: Methodsmentioning

confidence: 99%

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et al. 2021

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In most cultures, bread is considered a rich and valuable food source. In bread processing, some bakeries use sodium bicarbonate as baking soda and extra salt and these chemical compounds have harmful effects on public health. The article analysed the state of the Russian bakery products market and the prospects for entering into it a new small bakery in order to occupy a new market niche. Particular attention is paid to the prospects of business development in the context of a possible restructuring of the market model, in connection with the global quarantine situation. A search and analysis of a potential market segment for the implementation of a small baking enterprise was carried out. The article analysed the strategic decisions recommended for small enterprises in the field of bakery production, which can facilitate entry and consolidation in the target market segment, as well as possible ways to expand this market segment. An analysis of the strengths and weaknesses of small and large enterprises of the bakery industry was also carried out to reveal their competitive advantages and weaknesses. Based on this analysis, behavioural models for small bakery enterprises in the market are proposed that will allow them not to enter into direct competition with large bakery producers, which is almost impossible, due to the inability of small businesses to compete effectively with large enterprises for a considerable period of time (commutative behaviour model adapted to the industry in question).

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Section: Methodsmentioning

confidence: 99%

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et al. 2021

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“…The construction of von Mises stress fields (Fig. 2) to determine the zones most susceptible to deformations can be found in [11,12], the analysis of defects and fatigue characteristics using finite element method can be found in [13,14]. The authors in [15] made the computer model of a moving bucket and studies the motion of a granular medium to find high pressure zones at the rear side of the bucket.…”

Section: Methodsmentioning

confidence: 99%

High temperature wear assessment of mining machines operating tools

Gromyka

Kremcheev

2020

E3S Web Conf.

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Mining is widely associated with the use of a variety of mining machines for various duties, such as extraction, loading and transportation of rock. Due to prolonged use of machines, the amount of wear of operating tools and machine parts increases. This problem is especially acute for mining and loading machines used in excavation and reclamation, because the wear rate is increased on those duties. The development of wear process and evaluation of the residual life of operating tools of mining and loading machines is well studied in world practice. However, given the variety of climatic, geological and mining conditions, unique for each mineral deposit, we are facing difficulties in creating a comprehensive model of wear process development. In modern researches on this area such issues as estimation of operating tools residual life during intense wear under extreme conditions of high temperatures and sharp temperature drop are understudied. These conditions are typical for deposits of such minerals as coal and peat, which are especially prone to spontaneous combustion. This review discusses methods for assessing various wear mechanisms and the effect of temperature on the intensity of those processes, as well as methods to determine the residual life of operating tools of mining and loading machines working in high-temperature environment.

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“…The induction motor (IM), as one of the key parts of the electric drive, is subject to multifactorial effects from the frequency converter, operating mechanism, and environment (Lavrenko & Shishljannikov, 2021;Bolobov et al, 2019). Although the squirrel-cage IM is a rather reliable machine (Marfoli et al, 2021), its operation is accompanied by wear and appearance of defects under the influence of the above factors.…”

Section: Induction Motors Deterioration and Defectsmentioning

confidence: 99%

Analysis of the behavior of asynchronous electric drive with a closed scalar control system when changing the inductance of the magnetizing circuit

Zhukovskiy

Vasilev

Korolev

et al. 2022

Indonesian J. Sci. Technol

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The article was devoted to the study of an automated electric drive with a scalar closed-loop speed control system. Severe duty and operating modes of electric drive determine the actual service life. Wear of the induction motor, as a key link of the electric drive, was associated with deviation from nominal parameters. The deviation of parameters of the induction motor equivalent circuit determined the resultant change of characteristics. The parameters of the equivalent circuit determined the accuracy of the adjustment of regulators and optimal algorithms in the control system of the electric drive. In continuous operation modes the possibility of auto-tuning regulators, which requires stopping or no-load mode, was excluded. The paper considered the influence of the magnetization circuit mutual inductance value of the induction motor on the behavior of the electric drive control system. Evaluation of the behavior of the scalar closed-loop speed control system was performed on the basic energy (power factor, efficiency factor) and mechanical (speed, electromagnetic torque) characteristics of the electric drive.

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Service life extension for rock cutters by increasing wear resistance of holders by thermomechanical treatment

Cited by 9 publications

References 0 publications

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High temperature wear assessment of mining machines operating tools

Analysis of the behavior of asynchronous electric drive with a closed scalar control system when changing the inductance of the magnetizing circuit

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