A.V. Polishuk

Kherson State Maritime Academy

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D.S. Pohorletsky

Kherson State Maritime Academy

ВЧ

В.В. Черненко

V.E. Lashkaryov Institute of Semiconductor Physics

ІГ

Ігор Грицук

Kherson State Maritime Academy

Igor Khudiakov

Kherson State Maritime Academy

V.P. Misiats

Khmelnytskyi National University

МS

МYKOLA SKYBA

Kyiv National University of Technologies and Design

Mykola Rubanka

Kyiv National University of Technologies and Design

OLEKSANDR MISIATS

Khmelnytskyi National University

Cooperative Institutions

Khmelnytskyi National University

Kyiv National University of Technologies and Design

Kherson State Maritime Academy

V.E. Lashkaryov Institute of Semiconductor Physics

Institute of Coal of the Siberian Branch of the RAS

Siberian State Aerospace University

Memorial University of Newfoundland

Electronics and Telecommunications Research Institute

Physical Sciences (United States)

Don State Agrarian University

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Use of iron in oil concentration sensor for continuous monitoring of marine diesel engine technical condition

Reporter of the Priazovskyi State Technical University Section Technical sciences (2023)

Igor Khudiakov Ігор Грицук D.S. Pohorletsky В.В. Черненко A.V. Polishuk

The article examines the features of the general problem of reliability, accuracy and durability of machines, mechanisms and devices, namely, the issue of friction, lubricating action, wear of the surfaces of parts and working bodies, which exist among themselves in very complex correlational dependencies. An approach to increasing the reliability of a ship's diesel engine is proposed, which requires the development of effective calculation methods and models for predicting the durability and wear resistance of materials of parts in friction nodes at the limit of lubrication in a wide range of changes in operating conditions and taking into account the variable modes of operation of a ship's diesel engine. The article considers the general approach and specific features of the construction of the components of the diagnostic system of the ship's internal combustion engine. Based on the selected volume of tasks solved by the diagnostic system, the sequence of functioning of its elements is determined. The implementation of this algorithm can have a significant effect in the complex use of diagnostic information together with statistical information stored individually for each mechanism, when managing its technical condition. On the basis of the proposed diagnostic model, it is possible to recognize the technical condition of marine diesel engines based on tribomonitoring data, detecting changes in friction conditions and an increase in the rate of wear of parts of the cylinder-piston group. This will enable the initiation of preventive corrective actions aimed at ensuring the reliable and safe operation of marine engines

Piston (optics)

Lubricity

Oil analysis

10.31498/2225-6733.46.2023.288180

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Features of low-temperature corrosion protection of cylinder sleeves of ship low-speed engines

Reporter of the Priazovskyi State Technical University Section Technical sciences (2023)

D.S. Pohorletsky Ігор Грицук Igor Khudiakov В.В. Черненко A.V. Polishuk

The article examines the specifics of solving one of the problems of low-speed marine engines, during which low-temperature corrosion of cylinder liners occurs during operation at minimum and partial load modes. An overview of the cooling systems of ship's main engines was conducted and possible prospects for improving the cooling systems of ship's diesel engines were considered. Attention is paid to the causes and methods of combating low-temperature corrosion of ship's main engines. The methods of regulating the cooling system of marine diesel engines were considered, and it was determined that the modern concept of regulation in the cooling system should include both automatic regulation of operational parameters due to the installation of frequency-regulated cooling system pumps, and regulation of the water-chemical parameters of the cooling system. Methods of regulating the operating parameters of the pumps in the cooling system of the ship's main engine were also considered, which use the principle of frequency regulation of centrifugal pumps to ensure the modes of operation with the highest efficiency. Thus, frequency regulation is an energy-efficient way of regulating centrifugal pumps with variable coolant flows in ship engine cooling systems and one of the ways to maintain an optimal temperature state. The possibility of modernizing the cooling system of cylinders of low-speed engines according to the principle of the LDCL system to reduce the impact and occurrence of low-temperature corrosion was considered

Active cooling

10.31498/2225-6733.46.2023.288181

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SYSTEM OF ADAPTIVE FREQUENCY CONTROL OF SPEED OF ROTATION OF THE ASYNCHRONOUS THREE-PHASE ELECTRIC MOTOR OF THE ROTOR CRUSHER DRIVE

Herald of Khmelnytskyi National University Technical sciences (2021)

МYKOLA SKYBA OLEKSANDR MISIATS A.V. Polishuk V.P. Misiats Mykola Rubanka

The analysis of a design and the principle of work of modern rotary crushers for crushing of waste of polymeric materials is carried out. Ways of possible improvement of the existing equipment for crushing of waste of polymeric materials are defined. The principles of automation of the rotary crusher drive are formulated. The structural scheme of the frequency control system of the rotor crusher drive is developed. The analysis of operation of asynchronous three – phase motors at frequency control of speed of rotation is carried out. The mechanical characteristics of the electric drive of the rotary crusher are determined. The methodological and theoretical bases of the study are the main provisions of strength of materials, theoretical mechanics and the theory of electric drive. The paper for the first time uses a comprehensive approach to the study of the grinding process of polymeric materials, which takes into account the dependence of their physical and mechanical properties on the conditions of the process, as well as kinematic and electrical characteristics of the equipment. The object of research is the technological process of mechanical grinding of light industry waste in rotary crushers. The subject of the study is the electric drive of a rotary crusher for processing polymer waste. The expression for calculation of mechanical characteristics of asynchronous electric motors according to their passport data is received that allows to calculate modes of work of drives of crushers at various power frequencies and various control laws. The use of frequency control of the electric drive of the rotary crusher for the processing of waste polymeric materials from light industry will increase the reliability of its operation. The research results can be used in the design of new and modernization of existing structures of rotary crushers for grinding waste polymeric materials.

Crusher

10.31891/2307-5732-2021-295-2-139-146

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Citations (1)