Measurement Control of the Degradation of the Properties of the Structural Materials of Shaft Lines

Komshin, A. S.; Медведева, О. В.

doi:10.1007/s11018-014-0491-3

Meas Tech

2014

DOI: 10.1007/s11018-014-0491-3

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Measurement Control of the Degradation of the Properties of the Structural Materials of Shaft Lines

A. S. Komshin

О. В. Медведева

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Cited by 3 publications

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“…This defect is manifested as follows: observed periodic bursts of high amplitude on the chronograms of rotation of the turbine. The reason for the fault can be [10]: -unbalance of brushes or their incorrect installation; -weak contact of brushes to the collector; -poor contact in the pick-up rings; -irregular arrangement of the main and additional poles.…”

mentioning

confidence: 99%

Phase-chronometric measuring systems for the provision of technological processes and diagnostics of the production of electromechanical engineering systems

Tumakova

Komshin

2017

MATEC Web Conf.

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Abstract. In paper the main problems and objectives assessment of the current technical condition of the machine-building equipment are considered. Modern measuring systems used in engineering analysis. The paper considers a phase-chronometric information technology-metrological support for the evaluation of the technical condition of the synchronous electromechanical systems on the example of turbine CHP. Analysis of the main problems in the diagnosis of electromechanical systems is given. Phase-chronometric method as a basis for building a new system of diagnosis of electromechanical systems reviewed. The paper describes the main elements of technology, assessment of the economic effects of its introduction in the industry.

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mentioning

confidence: 99%

Phase-chronometric measuring systems for the provision of technological processes and diagnostics of the production of electromechanical engineering systems

Tumakova

Komshin

2017

MATEC Web Conf.

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Influence of direct current (DC) on mild steel coating stainless steel rods via TIG welding: A model for the rehabilitation of steel components

Muigai

Mwema

Akinlabi

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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In this paper, the influence of varying DC current on microstructures of mild steel substrates coated with stainless steel using TIG welding technique was investigated. To achieve the desired results, mild steel substrates of sizes 40 mm × 10 mm × 1.5 mm were used. The mild steel substrates were ground using Silicon Carbide (SiC) papers to achieve smooth surfaces and to remove oxides that might be present on their surfaces. Then the substrates were coated using stainless-steel rods on TIG 2200i AC/DC machine as a welding power source. The process was undertaken under six varying currents of 40 A, 50 A, 55 A, 60 A, 65 A and 70 A. For purpose of characterization, microstructures of the coated samples were studied using optical microscopy and quantitative image analyses. The depth of penetration of the melt pool below the substrates and the coating thickness were measured for all the samples. Based on the optical microscopy, four zones were identified on the TIG coated samples; the heat-affected zone (HAZ), fusion, coating and a skirt (the region that formed between the substrates and the coatings). Minute porosities were also observed in the coated samples. It was observed that the maximum coating thickness was 5.345 mm and the highest average coating thickness was 3.522 mm, which both occurred at 40 A. The maximum length of penetration was 3.864 mm and was observed when 60 A DC was used. Similarly, the highest average depth of penetration was 2.422 mm and occurred at 65 A. The results of this study showed that for direct current, as the current increased from 40 A to 50 A, the porosities in the coated samples increased. However, at 55 A, the number of porosities decreased, but continued to increase from 60 A to 65 A, but the porosities decreased again at 70 A.

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On the Assessment of Measurement Results and Their Interpretation to Obtain Information on the Operation of Machines and Mechanisms

Пронякин¹

2016

PoHEI.MB

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* Работа поддержана в рамках НИР по выполнению проектной части государственного задания в сфере научной деятельности Задание № 9.1265.2014/К и Задания № 2014/104 на выполнение государственных работ в сфере научной деятельности в рамках базовой части государственного задания Минобрнауки РФ. #5 [674] 2016 ИЗВЕСТИЯ ВЫСШИХ УЧЕБНЫХ ЗАВЕДЕНИЙ. МАШИНОСТРОЕНИЕ 75 CMM technical diagnostics. For example, commonly used amplitude methods do not provide reliable detection of resistant characteristics to assess the functioning of mechanical and electromechanical systems, and the determination of incipient defects and emergency protection. Expert assessments are subjective and depend on the professional level of the specialists, not allowing the adoption of reliable operational solutions to implement control measures and emergency protection. A new phase-chronometric method is proposed for obtaining information on the functioning of CMMs based on a unified complex of precision chronometry devices and mathematical modelling. The phase-chronometric method provides a higher level of metrology and a relationship between the measurement and processing results, and the functioning mechanism elements. This method can also be used to solve problems of the CMM functioning assessment at a higher level.

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Measurement Control of the Degradation of the Properties of the Structural Materials of Shaft Lines

Cited by 3 publications

References 3 publications

Phase-chronometric measuring systems for the provision of technological processes and diagnostics of the production of electromechanical engineering systems

Phase-chronometric measuring systems for the provision of technological processes and diagnostics of the production of electromechanical engineering systems

Influence of direct current (DC) on mild steel coating stainless steel rods via TIG welding: A model for the rehabilitation of steel components

On the Assessment of Measurement Results and Their Interpretation to Obtain Information on the Operation of Machines and Mechanisms

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