THE PROCESS OF RESTORING THE IMPELLER OF A CENTRIFUGAL PUMP IN A LASER INSTALLATION

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Published: Wednesday, 19 April 2023 17:39
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Volume 14 (2), April 2023, Pages 166-172

Nazim Ibrahimov1, Aytaj Halykova2

1Professor, “Materials Science and Processing Technologies”, Azerbaijan State University of Petroleum and Industry, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Master's degree, “Materials Science and Processing Technologies”, Azerbaijan State University of Petroleum and Industry, Azerbaijan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

 ABSTRACT

 One of the widely used pumps in the oil industry is the centrifugal pump. During the long-term operation of the centrifugal pump, many failures are observed. One of the main failed parts is the impeller. As we know, an integral part of the functionality of a centrifugal pump is its impeller. Without an impeller, no centrifugal force can be generated on the incoming fluid. So, without an impeller, a centrifugal pump cannot work at all. For this reason, failure of the pump impeller had to be eliminated in order to prevent the pump from malfunctioning and to ensure the maximum length of uninterrupted operation of the pump. The main causes of impeller failure are the effects of cavitation, corrosion and erosion. Here, the coating (layer) resistant to corrosion and corrosion on the surfaces of the impeller of the centrifugal pump was considered. Specially for this, in the appropriate LD-2000 laser device, abrasives with different compositions were selected and their technological regime was developed. Ni, Cr, Fe, Si, Mo elements were used as abrasives. Knowing the composition and physical-chemical characteristics of each of these elements, an accurate report of the technological regime was conducted.

With this technological regime, it is appropriate to apply a coating (layer) of any thickness to the surface of the working wheels. This process was carried out in the laser center of the Azerbaijan State Oil and Industry University.

Keywords: alloy coating, abrasion, corrosion and corrosion resistance, technological mode, laser device.

RESEARCH ON THE TECHNOLOGY OF PREPARING PLASTIC AND THREADED COMPONENTS USING 3D PRINTING OR ADDITIVE MANUFACTURING

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Published: Wednesday, 19 April 2023 17:37
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Volume 14 (2), April 2023, Pages 154-159

Naila Gasanova1, Nijat Gaytaranov2, Nijat Gojayev3

1Assistant professor, Azerbaijan State Oil and Industry University, Doctor of technical sciences, Azerbaijan Republic. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2,3Master, Azerbaijan State Oil and Industry University, Azerbaijan Republic. E-mail: 2This email address is being protected from spambots. You need JavaScript enabled to view it., 3This email address is being protected from spambots. You need JavaScript enabled to view it.

 ABSTRACT

 Threaded components play a crucial role in ensuring the safety and reliability of systems by joining components together. Proper selection of thread type and size, ensuring proper machining and storage of components, and addressing potential issues such as leakage, vibration, and misalignment all play a special role. It is known that there is a big difference in the nature of the destruction of metal and plastic threaded connections, in particular, when the nut is made of plastics, and the bolt is made of steel, or vice versa. In this regard, at present there is no consensus in assessing the strength of plastic threaded connections. On the one hand, it is recognized that, due to a more uniform distribution of the load, plastic threaded connections have a significant load capacity. Numerous examples of the use of plastic threaded connections in pressure pipelines, in large plastic parts subjected to dynamic loads, various loaded fasteners - all these examples confirm that plastic threaded connections can withstand very high loads. Production of a thread of plastic details is rather difficult, than on metals. It is connected with the physical-mechanical processes coming in the course of production of concrete thread details from plastic by method of pressing and casting under pressure. Also mechanics of formation of plastic threads on details of the oil-field equipment on the specific properties differ from the threads received by a machining method on metals. As thread surfaces on plastic details are formed in compression molds depending on materials and the modes: temperatures, pressure and time of production. These regime parameters and guided parameters play a part at a guaranty of physicalmechanical properties of details in the course of production. The use of plastic or polymer threads in the oil and gas industry is increasing due to their unique characteristics and advantages over traditional metal threads. Recently, 3D printing (additive manufacturing) has become more widely used for the preparation of plastic threads. The article will discuss the methods and characteristics of preparing plastic threaded components, as well as their advantages and certain incompatibilities.

Keywords: threaded components, plastic threaded components, preparation methods, 3D and 4D printing.

PRIMARY OIL REFINING AND HEAT EXCHANGER APPARATUS

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Published: Wednesday, 19 April 2023 17:34
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Volume 14 (2), April 2023, Pages 147-153

Natig Abbasov1, Farahim Tahmazov2

1Lecturer, "Industrial machinery" Department, Azerbaijan State Oil and Industry University, Candidate of technical sciences, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Magistr, "Industrial machinery" Department, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.  

 ABSTRACT

 Different technological processes are applied in the field of modern oil refining. Each of the processes in turn is implemented by many technological schemes and methods. In petroleum refining and chemical production, these technological processes provide the basis for many simple processes. In this way, the learning of the processes is facilitated. They process oil and its products by applying various processes.

Oil refining and its main organic synthesis plants are composed of a collection of various technological processes and general plant farms. Depending on the number and quality of the products received from the factories, great attention is paid to the supply of hardware and equipment. It is through these equipment and devices that technological processes are carried out. Heat exchangers are among the most commonly used devices in the oil refining industry. The most common type of heat exchangers are shell-and-tube heat exchangers. Shell and tube heat exchangers are technological in the oil and gas industry pretreatment to improve properties and reduce viscosity of streams stages are widely used.

Distribution of shell-and-tube heat exchanger design reliability and due to the variety of types and versions to work in a wide range of temperature, pressure and corrosive environment.

At the current stage of production development, an important trend is increasing the efficiency of the used technological equipment, ensuring high energy efficiency in relation to heat exchange equipment.

Flat cross-sections of different configurations are used to organize the cross current in the inter-tube space of the heat exchanger and to increase the cooling speed. The presence of such partitions significantly complicates the flow pattern of the cooling liquid, and is reliable for the flow around the tube bundle. Currently used methods of heat exchanger heat calculation based on criterion dependencies do not take into account all characteristics of the flow.

Keywords: Boiler, reactor, heater, furnace, filter, air cooler, electrodehydrator, gasoline, diesel, catalyst, injector, pump, piping, hot flow, cold flow.

MATHEMATICAL EXPRESSIONS FOR TEMPERATURE IN THE CONTACT ZONE OF TEETH OF THE GEAR MECHANISMS

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Published: Wednesday, 19 April 2023 17:11
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Volume 14 (2), April 2023, Pages 126-134

Amir Mustafayev1, Chingiz Nasirov2

1Associate Professor, Department of Mechanics, Azerbaijan State Oil and Industry University, Azerbaijan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Master, Department of Transportation and Storage of Oil and Gas, Azerbaijan State Oil and Industry University, Azerbaijan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

 ABSTRACT

 Transmission gears are very widely used in modern machine building. Despite that electrical transmissions used in machine building industry, mainly mechanical transmissions are widely used in the industry. Because mechanical transmissions are independent and better than other transmisions.

Distributing power between the transmission mechanisms and working units of various machines, changing the angle of momentum, by adjusting the speed of the parts, it is possible to change the type of movement, turn on and off the mechanism, change the direction of the transmission mechanisms.

One of the most widespread types of transmission technology is the gear transmission. Tens of thousands of kilowatt-hours of gears can be transmitted.

Advantages of gear transmission in comparison with others is their ability to maintain their reliability and long term functioning of the teeth, big value of the working coefficient (0,9 ÷ 0,99), simple construction, lack of special service, simplicity of the transmission number and compactness of dimensions.

The missing aspects of these transmissions are high precision in their preparation and installation, and low noise level.

The main criterion for the working ability of the closed gear transmissions is the contact endurance of the active surface of the tooth. For this reason, the main dimensions of the transmission are determined by the contact tension and by teeth bending.

Key words: gear wheel, tension, endurance, bending

 

INFLUENCE OF THE METHOD OF ELECTROLYTIC POLISHING, MECHANICAL TREATMENT AND PURITY OF THE BASE METAL SURFACE ON THE STRENGTH OF BONDING BY ELECTROLYTIC DEPOSITS OF IRON

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Published: Wednesday, 19 April 2023 17:23
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Volume 14 (2), April 2023, Pages 135-146

Agali Guliyev1, Ibrahim Habibov2, Aynur Sharifova3, Zohra Garayeva4

1Dosent, department of “Materials science and processing technologies”, Azerbaijan State Oil and Industry University, candidate of technical sciences, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

2Professor, Director of the design center “Engineer”, Azerbaijan State Oil and Industry University, Doctor of technical sciences, Azerbaijan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0003-3393-7812

3Dosent, department of “Materials science and processing technologies”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

4Teacher, “Industrial Machines”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0001-8824-623X

 ABSTRACT

 In the present work, the influence of the composition of the electrolyte and the duration of electropolishing of the base metal on the strength of adhesion to iron deposits was studied, and the method of mechanical treatment before applying electrolytic coatings was shown to determine not only the microgeometry of the surface, but also the physicochemical state of the metal in the surface layer, thereby affecting the protective properties. oxide film. On the other hand, the type of machining affects the cost of restoring and coating parts. Therefore, it is practically important to determine the effect of the method of machining and the surface finish of the base metal on the adhesion strength with electrolytic iron deposits.

 Along with mechanical action, chemical processes play an important role in polishing. The surface of the metal is covered with thin, invisible oxide or salt films under the influence of the environment and the chemically active substances contained in the polishing pastes. When polishing, the film is removed, but on the exposed areas of the metal it is formed again. The hardness of abrasive grains during polishing is not as important as during grinding, since in the first case the abrasive removes a thin film that is less durable than metal.

In the process of manufacturing parts by mechanical polishing, traces of processing in the form of small irregularities remain on their surface. The magnitude of these microroughness’s determines the surface finish of the parts. This characteristic has a great influence on the quality of the finish and the performance properties of the products. The smoother the metal surface, the better it resists corrosion.

Improving the surface finish increases the wear resistance of the parts. Obtaining shiny surfaces is also associated with the need to remove microroughness.

It has been determined that the cleanliness of the surface treatment of parts before electroplating is determined by their purpose and type of coating. Surface cleanliness depends on how the parts are prepared before electroplating. Polishing products with a lower initial surface finish significantly increases the processing time, which reduces the productivity of the equipment.

It has been established that electrochemical and chemical polishing have several advantages over mechanical polishing. They do not require the physical effort of the worker, which reduces the complexity of finishing operations. Many products of various shapes and sizes can be processed simultaneously, which is not feasible when polishing with circles.

 

Electrochemical polishing has become more widespread in industry. With its help, a greater smoothing and more intense gloss of the metal surface is achieved than with chemical polishing. The use of this process in preparation for electroplating reduces the number of operations and transitions and improves product quality by increasing the adhesion strength of the coating to the base metal.

Keywords: Machining, surface finish, electropolishing, electrolyte, roughness, adhesive strength, iron precipitation, iron plating.

VOLUMETRIC RIGIDITY OF HYDRAULIC SYSTEMS

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Published: Wednesday, 19 April 2023 17:09
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Volume 14 (2), April 2023, Pages 117-125

Ali-Hikmat Ahmadov1, Samir Abbasov2

1Associate Professor, Candidate of Technical Sciences, Azerbaijan State Oil and Industry University, Azerbaijan.  E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. This email address is being protected from spambots. You need JavaScript enabled to view it.@This email address is being protected from spambots. You need JavaScript enabled to view it.. This email address is being protected from spambots. You need JavaScript enabled to view it.. This email address is being protected from spambots. You need JavaScript enabled to view it.

2Master, Azerbaijan State Oil and Industry University, Azerbaijan.  E-mail: Samir.a-ov00@This email address is being protected from spambots. You need JavaScript enabled to view it..This email address is being protected from spambots. You need JavaScript enabled to view it.   

ABSTRACT   

A hydraulic drive is a set of interacting hydraulic devices that is designed to be ghosted by means of a working fluid under pressure. The main element in hydraulic drives most machines is a power hydraulic cylinder. Hydraulic cylinder refers to volumetric hydraulic devices, since their operating mode is to fill the volume of the working chamber and empty it. The very principle of operation of the hydraulic cylinder is based on the movement of the worker organ (piston, membrane, plunger), under the influence of the energy of the flow fluid or the mechanical energy of external forces (gravity, spring). Depending on the principle of operation of hydraulic cylinders, it can be divided into two groups: one-way hydraulic cylinder, two-acting hydraulic cylinders. To ensure the operation of the hydraulic cylinder, a pump is required, the purpose of which is to convert mechanical energy into the energy of the flow fluid. Studying the stiffness of a hydraulic cylinder can help determine the optimal load that a hydraulic cylinder can withstand, as well as help in choosing the right size of hydraulic cylinder for a particular system. The stiffness of the hydraulic cylinder can be determined by measuring the movement of the hydraulic cylinder as the load increases in a given range. For example, a hydraulic press can be used to increase the load on a hydraulic cylinder to a certain value, and then a measuring tool can be used to determine the movement of the hydraulic cylinder. This data can be recorded on a computer, which can then be used to analyze and calculate the stiffness of the hydraulic cylinder. The stiffness of the hydraulic cylinder can be expressed in newtons per millimeter or other units depending on the specific measurement system. By using various materials (indicated in the literature), the results of studies aimed at determining the reduced volumetric stiffness of high-pressure hoses and the dependence of the reduced volumetric stiffness of the hydraulic cylinder on the change in the volumes of the working cavities in the process of moving its rod are given.

Keywords: hydraulic system, volumetric stiffness, hydraulic cylinder, module, hydromechanical systems, hoses, pressure, rod, dynamics.

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