Repair Of Equipment Research Articles

COOPERATION BETWEEN GOSNITI
 AND CHGAU IN RESEARCH ACTIVITIES

The end of the 90 – the beginning of the 2000 s can be characterized as a period in which there was a critical situation related to the financing of research in agroengineering universities. An important role in the system of agroengineering training was played by educational and experimental farms, which performed the function of technical equipment of the educational and scientific-production process. With the termination of the allocation of budget allocations for the development of educational and experimental farms, the number of scientific developments has decreased. (Research purpose) The research purpose is studying the experience of organizing new forms of support for educational, scientific and production activities based on the integration of the GOSNITI research Center with the Chelyabinsk State Agroengineering University on the basis of the Department of Machine Repair, initiated by Vyacheslav Ivanovich Chernoivanov. (Materials and methods) The main directions and results of the activity of Sector 18 related to the issues of improving the technical equipment of the agro-industrial complex of the Southern Urals are considered. (Results and discussion) It is shown that the main activities of Sector 18 were the development of technologies for the non-disassembly extension of the post-repair life of internal combustion engines and agricultural machinery units using nanomaterials; development of technologies for sharpening the working bodies of tillage agricultural machines using electrophysical processing methods; improvement of the production process with the development and implementation of QMS according to GOST R ISO 9001-2008 during the modernization of tractors and combines; renovation repair and technological equipment; restoration of parts by electrophysical methods. The important contribution of scientists to improving the quality of education in the training of engineers of technical service of agricultural machinery was noted. (Conclusions) The training of competitive mechanical engineers in universities with the necessary professional knowledge, competencies and practical skills is impossible without close scientific cooperation of the graduating departments of universities with the relevant laboratories of leading research institutes.

OPTIMALISASI PENERAPAN REGULASI PERBAIKAN ALAT KESEHATAN DAN STRATEGI PENGADAAN MENGGUNAKAN METODE KONTRAK PAYUNG DALAM MENINGKATKAN EFEKTIVITAS MANAGEMEN LOGISTIK DI RSUD GAMBIRAN KOTA KEDIRI

The preparation of logistics for services in hospitals is very important because, without adequate logistics in terms of quantity, specification of goods, and accuracy of distribution, it is certain that services will be disrupted. In addition to preparing logistics, the logistics sector is responsible for implementing orderly administration in the logistics, equipment, and household sectors. The logistics sector prepares plans for the needs and procurement of logistics materials, compiles maintenance plans, compiles periodic reports on the condition of materials needed and installation equipment, and makes evaluations and suggestions regarding the use of materials/equipment and equipment (storage, management of materials or equipment and office inventory items) in all units in the hospital. This study aims to identify causes and provide solutions through effective strategies to improve logistics management at Gambiran Hospital, Kediri City. The method used is a fishbone diagram (Fishbone), USG method (Urgency, Seriousness, Growth), and SWOT analysis (Strength, Weakness, Opportunity, Threat). Based on the study results it was obtained to determine problems related to effective strategies to improve logistics management at Gambiran Hospital, Kediri City. The solutions proposed to overcome these problems are through optimizing regulations and strategies procurement in improving logistics management at Gambiran Hospital, Kediri City, in the form of implementing an MoU (Memorandum of Understanding) with third parties regarding the repair of equipment contained in the medical device maintenance service contract and implementing a logistics procurement strategy using the umbrella contract method.

Designing price-service menus in a product-service system

We study contract menu design by a vendor leasing production equipment to its clients who serve customers. The equipment can fail which can cause delays to clients' customers. The equipment vendor can offer its clients three types of lease-and-repair contracts: equipment lease with an immediate replacement upon failure, repair with a redundant unit on client premises (parallel layout), and repair without a backup unit on the premises. The vendor does not have full information about each client but knows that clients fall into two types. ‘High’ (vs. ‘Low’) type clients have a higher (vs. lower) willingness to pay but have customers who are more (vs. less) delay-sensitive. Modeling the interaction between the vendor and its clients as a leader-follower game and using queueing theory, we show that a monopolistic vendor can increase its expected profit through second-degree price discrimination by offering a menu of contracts to its clients. We find that when the distribution of customers with low and high willingness to pay is not skewed (one-sided) and either the cost of repair or cost of equipment is low the vendor can increase its profit by inducing price discrimination through offering the menus proposed in the paper.

Decision support models and methods to analysis and development in the IT services and equipment repair organizational and production processes management field

Subject of research: is the models and decision support methods in the field of organizational management and IT services and equipment repair production processes.
 Purpose of research: is to analyze existing and create new models, algorithms and technologies for the implementation of a decision support system for the service platform in the field of IT and equipment repair.
 Methods and objects of research: include systems management theory, decision theory, automatic text processing methods, automatic control theory, information systems design theory, optimization theory and object-oriented programming.
 Main results of research: is a prototype aggregator platform, reflecting services in the IT and equipment repair, system architecture, development tools, interface.

Analysis of WE Parameters of Life Using Adaptive-Progressively Type-II Hybrid Censored Mechanical Equipment Data

A new two-parameter weighted-exponential (WE) distribution, as a beneficial competitor model to other lifetime distributions, namely: generalized exponential, gamma, and Weibull distributions, is studied in the presence of adaptive progressive Type-II hybrid data. Thus, based on different frequentist and Bayesian estimation methods, we study the inferential problem of the WE parameters as well as related reliability indices, including survival and failure functions. In frequentist setups, besides the standard likelihood-based estimation, the product of spacing (PS) approach is also taken into account for estimating all unknown parameters of life. Making use of the delta method and the observed Fisher information of the frequentist estimators, approximated asymptotic confidence intervals for all unknown parameters are acquired. In Bayes methodology, from the squared-error loss with independent gamma density priors, the point and interval estimates of the unknown parameters are offered using both joint likelihood and the product of spacings functions. Because a closed solution to the Bayes estimators is not accessible, the Metropolis–Hastings sampler is presented to approximate the Bayes estimates and also to create their associated highest interval posterior density estimates. To figure out the effectiveness of the developed approaches, extensive Monte Carlo experiments are implemented. To highlight the applicability of the offered methodologies in practice, one real-life data set consisting of 30 failure times of repairable mechanical equipment is analyzed. This application demonstrated that the offered WE model provides a better fit compared to the other eight lifetime models.

Seismic resilience evaluation and retrofitting strategy for substation system

Electrical substation systems have always had an obvious vulnerability during earthquakes. To find an efficient retrofitting strategy at a substation’s functional network level, this paper proposes a seismic resilience evaluation framework that combines seismic simulation and function recovery. According to the structural connectivity and redundancy of substation seismic behavior, a directed acyclic graph was built. After careful consideration of the load transmission capacity of substation equipment and important coefficients of the output terminal, a structural and electrical dual-function network model was established using the Simulink module. The model was divided into four analytical steps for hierarchical simulation. Post-earthquake iterative analysis was carried out according to equipment repair efficiency. The post-earthquake repair sequence was found, and the steps to functional recovery were obtained. To quantify the seismic retrofitting efficiency of equipment, a set of seismic analytical methods for retrofitting was developed using a typical 220 kV substation. Seismic resilience analysis using the Monte Carlo method led to new optimal retrofitting strategies under different resource limitation conditions. These new strategies are presented in this paper.

System for dynamic prediction of the technical condition of the equipment of a combined electric power system

This paper analyses the neuro-fuzzy modelling method for predicting the technical state of a system. The model of the system for dynamic forecasting of the technical condition of the equipment of an integrated power system consists of: a simulation model of a solar power plant, a simulation model of a wind turbine, and a simulation model of a synchronous generator acting as a thermal power plant. To perform the modelling, a special system of tools Fuzzy extension logic toolbox was used to assess the quality of the synchronous generator. The obtained estimates of the technical condition of the equipment are processed using an adaptive neuro-fuzzy inference system (ANFIS), which results in a forecast of the technical condition of the equipment at a given time interval. It has been established that fuzzy models have found wide practical application in the construction of fuzzy controllers, data recognition and processing systems, etc. Modelling of real systems with fuzzy models is based on the fact that fuzzy models of the Sugeno and Mamdani types are universal function approximators. The constructed model of the system for dynamic forecasting of the technical condition of equipment can be used in the design of renewable energy facilities, as well as in the development and testing of algorithms for control and monitoring systems. The system for assessing and predicting the state of equipment using fuzzy logic can be used to support decision-making by the power plant operator when determining the need for repair and relocation of equipment. The key advantage of the presented system is its ability to take into account dynamic changes in the state of a solar power plant depending on the transmitted operating conditions, which makes it possible to bring the obtained data even closer to the real ones. Also, a feature of the system for dynamic forecasting of the technical condition of equipment is the use of a simulation model of a solar power plant, which has a model to bring the simulation closer to real operating conditions, taking into account dust, surface heating etc.

АНАЛІЗ СИСТЕМИ ТЕХНІЧНОГО ОБСЛУГОВУВАННЯ І РЕМОНТУ АВТОМОБІЛЬНОЇ ТЕХНІКИ ПІД ЧАС БОЙОВИХ ДІЙ (2014-2016 років) ТА ШЛЯХИ ЇЇ УДОСКОНАЛЕННЯ

The article analyzes the system of maintenance and repair of automotive equipment based on the experience of conducting combat operations, and further ways of improving this system are determined. Taking into account the development trends of the armed struggle, the military and political situation in the world, the Ukrainian people should be confident in the combat capability of their Armed Forces (hereinafter - the Armed Forces). Based on this, the leadership of the Ministry of Defense and the General Staff of the Armed Forces of Ukraine pay important attention to the technical condition of weapons and military equipment (hereinafter referred to as military equipment) (including automotive equipment). During the operation of the car, its functional properties gradually deteriorate due to activation, damage to parts, corrosion, fatigue of the material from which it is made, and so on. Various malfunctions (defects) occur that significantly reduce the efficiency of car operation. Considering the fact that the vast majority of existing models of automotive equipment are in operation for more than 18-25 years (while most of the time is in storage), the importance of the effective functioning of the maintenance and repair system (hereinafter referred to as M&R) to maintain a given level of their combat capability is increasing. In modern conditions, timely and high-quality maintenance and repair of weapons and military equipment has become an important influencing factor of the combat capability of troops (forces), because it is a process that results in the combat potential of units, units and formations of the Ground Forces being maintained at a given level during long time [2, p. 161]. Keywords: system of technical maintenance and repair, automotive equipment, repair and restoration bodies, system of auto technical support.

ОБҐРУНТУВАННЯ ТЕХНІЧНИХ ВИМОГ ДО ВЛАСТИВОСТЕЙ СУЧАСНИХ ЗРАЗКІВ РУХОМИХ ЗАСОБІВ ТЕХНІЧНОГО ОБСЛУГОВУВАННЯ І РЕМОНТУ РАКЕТНО-АРТИЛЕРІЙСЬКОГО ОЗБРОЄННЯ

Today's realities have led to the fact that in various sources they are actively considering the issue of finding options for improving the system of repair and restoration of weapons and military equipment in the Armed Forces of Ukraine and improving (modernization) of mobile means of maintenance and repair of anti-aircraft weapons. Of course, in most cases, the subject of these works is the consideration of means of maintenance and repair of automotive equipment, somewhat less often of armored weapons and equipment, and, unfortunately, there are almost no works related to mobile means of maintenance and repair of missile and artillery weapons. The previous article was devoted to the analysis of the composition of mobile means of maintenance and repair of missile and artillery weapons in the Armed Forces of Ukraine and the procedure for their use. The issue of improving the existing mobile means of maintenance and repair of weapons of the missile and artillery nomenclature was also considered. The material presented in it created the conditions for justifying in this article the technical requirements for the properties of mobile means of maintenance and repair of missile and artillery weapons. In the opinion of the authors, it is appropriate to substantiate such properties as maintainability, technological equipment and cost-effectiveness of repair samples of missile and artillery weapons. The substantiation of the above technical requirements will create all the prerequisites for the development of recommendations necessary for the development of mobile means of maintenance and repair of modern missile and artillery weapons, the main ones of which may be - recommendations regarding the basic chassis and body of a van (container), regarding the equipment and specialization of the workshop and regarding the functional filling and calculation of the workshop. Keywords: missile and artillery weapons, ground weapon systems, mobile vehicle, repair, restoration.

РЕКОМЕНДАЦІЇ ЩОДО УДОСКОНАЛЕННЯ РУХОМИХ ЗАСОБІВ ТЕХНІЧНОГО ОБСЛУГОВУВАННЯ І РЕМОНТУ ОЗБРОЄННЯ ТА ВІЙСЬКОВОЇ ТЕХНІКИ

After the full-scale invasion of the Russian Federation on the territory of Ukraine, the issue of repair and restoration of weapons and military equipment of all types that are in service with the Armed Forces of Ukraine and those that come as material and technical assistance from partner countries has become acute, more than ever in the entire existence of the Armed Forces of Ukraine. In particular, there is the issue of repair and restoration of all types of weapons and military equipment by temporary repair and restoration bodies. In this article, an analysis of the composition and order of use of mobile means of maintenance and repair of missile and artillery weapons in the Armed Forces of Ukraine was carried out, and a comparison was made with the composition and order of use of mobile means of maintenance and repair of the US Armed Forces. Also, during the work, attention was paid to the improvement of the existing mobile means of maintenance and repair of weapons of the missile and artillery nomenclature. This issue was investigated by substantiating the prospects for the development of mobile means of maintenance and repair of missile and artillery weapons. The mentioned questions have significant problems and cause curiosity and exploratory research among specialists in the technical direction of logistics support in view of the need to make such qualitative changes to the restoration system that would allow to ensure the maximum coverage by proper repair of all defective samples of weapons and military equipment, including samples of foreign production, i.e. those that are in service with NATO countries. But first of all, it is necessary to develop specific recommendations for a prospective complex of mobile vehicles, which will include not only a qualitative update of repair equipment, but also take into account the principle of unification, interoperability and modularity of the sample under study. Keywords: maintenance, repair, restoration, mobile vehicle, missile and artillery weapons.

Restoration of rolled equipment using composite materials

In recent years, polymer materials with various adhesive compounds based on epoxy resins, polyesters, polyurethanes, polyacrylics, and others enriched with fine-dispersed metallic and other fillers have found wide application in various industrial sectors for equipment repair. These composite repair materials have excellent adhesive properties when applied to metal surfaces, and when combined with their high strength and the ability to transition from a plastic to a solid state without shrinkage in a short period of time, they provide a broad range of applications in solving repair problems. A technology for restoring the original dimensions of equipment parts using composite materials has been developed, eliminating the need for welding and milling. Numerous industrial tests have shown that composite materials allow solving a range of serious repair problems in rolling production, particularly on heavily loaded sheet rolling stands and blooming mills when restoring worn contact surfaces of this equipment. An original technology for the application of composite materials was developed at the Pryazovskyi State Technical University (Mariupol, Ukraine), which allowed for a unique repair operation at one of the metallurgical plants, involving the installation of a new blooming mill housing onto old worn plates with wear of up to 7 mm at certain points. These composite repair materials have excellent adhesion properties when applied to metal surfaces, which, in combination with their high strength and the ability to transition from a plastic to a solid state without shrinkage in a short period of time, provide a wide range of applications in solving repair problems. Additionally, there are cases of damage to certain types of machinery that are either impossible to repair using traditional methods or require significant material and time investments for restoration

Logistic Model Tree Forest for Steel Plates Faults Prediction

Fault prediction is a vital task to decrease the costs of equipment maintenance and repair, as well as to improve the quality level of products and production efficiency. Steel plates fault prediction is a significant materials science problem that contributes to avoiding the progress of abnormal events. The goal of this study is to precisely classify the surface defects in stainless steel plates during industrial production. In this paper, a new machine learning approach, entitled logistic model tree (LMT) forest, is proposed since the ensemble of classifiers generally perform better than a single classifier. The proposed method uses the edited nearest neighbor (ENN) technique since the target class distribution in fault prediction problems reveals an imbalanced dataset and the dataset may contain noise. In the experiment that was conducted on a real-world dataset, the LMT forest method demonstrated its superiority over the random forest method in terms of accuracy. Additionally, the presented method achieved higher accuracy (86.655%) than the state-of-the-art methods on the same dataset.

Youth in artisanal and small-scale mining (ASM) and higher education nexus: Diffusion of innovations and knowledge transfer

Research literature has underscored the growing engagement of youth in artisanal and small-scale mining (ASM). However, no published study has explicitly investigated the symbiotic exchanges on how youth in ASM transfer acquired knowledge and practical skills to educational settings and how they in turn transfer their acquired knowledge in higher education institutions to the ASM sector. Based on our inquiry in Ghana, involvement of educated youth in ASM had resulted in a) diffusion of innovations to the ASM sector, b) skills/knowledge transfer on mineral processing, c) knowledge transfer on health and safety in mining, d) provision of equipment repair and maintenance services, and e) transfer of legal knowledge and processes to the sector. With the transfer of mining-related experiences to educational settings, three sub-themes emerged: f) sharing of ASM experience and knowledge with peers and tutors, g) experiential learning and practical understanding of theoretical concepts, and h) enhanced higher education-ASM industry synergies. In relation to these findings, we argue that the future of the ASM sector in Ghana and broadly sub-Saharan Africa concerning cleaner production and environmentally safe mining practices, to a greater degree, relies on educated youth who hold enormous promise to champion innovation and knowledge transfer to the sector.

Development of diagnostic programs for current repair of intelligence equipment.

Technical means of intelligence (hereinafter – TMI) are widely used in all spheres of intelligence activity. Their element base and schematic solutions are continuously improved in the direction of automating the execution of technological operations. This leads to an increase in the number of elements in the product, which in turn does not contribute increasing reliability indicators. Therefore, the issue of restoring performance in the event of failures of TMI is quite relevant, since the time of technical diagnosis takes up to 80 percent of the repair time. The authors have been working for many years in the field of technical diagnostics of complex objects and systems, which differ in purpose, schematic and constructive construction, and requirements for recovery time. At the same time, it is important to develop high-quality diagnostic support for repairs, taking into account the specifics of the specific object of diagnosis, as well as the conditions for restoring performance. Some sources consider the use of some features of the object of diagnosis during the development of their diagnostic support, but there is no general approach to this. Therefore, the article proposes the use of all features of the object of diagnosis to improve the quality of their diagnostic support. This makes it possible to ensure the necessary quality of restoration of the functionality of the object of diagnosis with minimal costs. It is advisable to use the proposed proposals during the improvement of the existing diagnostic support and its development for promising technical means of intelligence. In the future, the authors plan to conduct research in the direction of increasing the efficiency of diagnosing discrete objects, as well as with accident and combat damage in the presence of multiple defects.

Reliability analysis and optimization design of a repairable k-out-of-n retrial system with two failure modes and preventive maintenance

This article deals with a repairable k-out-of-n: G system with retrial feature and two maintenance policies. All components in the system have two failure modes, mode a failure and mode b failure. When a component fails, the failed component will be repaired instantly if the repair equipment is idle. Otherwise, it enters into a retrial orbit and tries again after some time until it is repaired. The single repair equipment may be subject to breakdown in a busy period, and in order to improve system reliability, the idle repair equipment will be performed preventive maintenance. The Markov process theory and Laplace transform method are adopted to compute the reliability indexes of the system. Also, four optimization design models are constructed to determine the optimal repair rates of the components with two failure modes, and the minimization problems of the total expected cost function per unit time and the cost-effectiveness ratio are solved. To verify the correctness of the model, numerical analysis is executed to demonstrate the impact of each parameter on system reliability indexes, the optimal solutions of different optimization design models are obtained by using differential evolution algorithm and genetic algorithm.

RESEARCH OF INFORMATION FLOWS IN THE CONTROL OF INTELLIGENT POWER SYSTEM REGIMES

The purpose of this work is to solve the problem of optimizing the management of maintenance and repair equipment at large enterprises. In a unified management system, the operational collection, consolidation and transfer of indicators about the state of all numerous power equipment allows solving and sometimes avoiding many problems. It is about reducing the time for repair work (equipment downtime), offloading personnel, optimizing logistics chains, and reducing material costs. The general problems of creating intelligent energy systems from the point of view of information and telecommunication technologies have been studied. A way to process information flows in the monitoring and management of intelligent energy systems modes is proposed, which involves combining information and mathematical technologies and the use of international data standards. The approach to the development of a new information and technological infrastructure of intelligent energy systems is considered. After conducting the analysis, the optimal system is seen as a multi-level control system for intelligent electric power systems. The technology combines intelligent tools for situation analysis and software systems for mode modeling and control. The use of IT infrastructure allows to create a single information space that includes data and knowledge, as well as a set of mathematical models and methods for solving the problems of the electric power industry in the conditions of active adaptive management. In the conclusions, a detailed classification of the types of information about mode parameters is provided and the relationship between the quality of mode information and the application of various mathematical models is determined.

Promising Paths for the Use of Additive Technologies in the Repair Industry

Promising paths for the development of additive technologies in the Russian Federation, technologies for automated repair of machines and equipment using machine vision and learning, as well as the creation of mobile workshops and complexes for the repair of machine parts are shown. In the repair industry, 3D scanning and reverse engineering of parts, 3D printing of spare parts and 3D technologies for repairing parts and components will be in great demand. The use of 3D technologies in the repair of machines reduces the consumption of filler material during the restoration of parts and increases their wear resistance.

Method for Forecasting the Remaining Useful Life of a Furnace Transformer Based on Online Monitoring Data

Implementing the concept of a “smart furnace transformer” should stipulate its information support throughout its life cycle. This requires improving techniques for estimating the transformer’s health and forecasting its remaining useful life (RUL). A brief review of the problem being solved has shown that the known RUL estimation techniques include processing the results of measuring the facility state parameters using various mathematical methods. Data processing techniques (deep learning, SOLA, etc.) are used, but there is no information on their application in online monitoring systems. Herewith, fast (shock) changes in the resource caused by the failures and subsequent recoveries of the facility’s health have not been considered. This reduces the RUL forecasting accuracy for the repairable equipment, including transformers. It is especially relevant to consider the impact of sudden state changes when it comes to furnace transformers due to a cumulative wear effect determined by their frequent connections to the grid (up to 100 times a day). The proposed approach is based on calculating the RUL by analytical dependencies, considering the failures and recoveries of the facility state. For the first time, an engineering RUL forecasting technique has been developed, based on the online diagnostic monitoring data results provided in the form of time series. The equipment’s relative failure tolerance index, calculated with analytical dependencies, has first been used in RUL forecasting. As a generalized indicator, a relative failure tolerance index considering the facility’s state change dynamics has been proposed. The application of the RUL forecasting technique based on the results of dissolved gas analysis of a ladle furnace unit’s transformer is demonstrated. The changes in the transformer state during the operation period from 2014 to 2022 have been studied. The RUL was calculated in the intensive aging interval; the winding dismantling results were demonstrated, which confirmed developing destructive processes in the insulation. The key practical result of the study is reducing accidents and increasing the service life of the arc and ladle furnace transformers. The techno-economic effect aims to ensure process continuity and increase the metallurgical enterprise’s output (we cannot quantify this effect since it depends on the performance of a particular enterprise). It is recommended to use the technique to forecast the RUL of repairable facilities equipped with online monitoring systems.

МЕТОДОЛОГИЯ РИСК-ОРИЕНТИРОВАННОГО ПРОЕКТИРОВАНИЯ ДЛЯ ОБЕСПЕЧЕНИЯ КОНКУРЕНТОСПОСОБНОСТИ В МИРОВОМ МАШИНОСТРОЕНИИ

The article presents materials on the development of risk-based design methodology as a new stage in the development of the system of design, manufacture, operation, maintenance, repair and disposal of equipment for effective and efficient competitiveness in the global engineering industry. It is shown that traditional design is no longer adequate to global planetary changes accompanied by a reduction in resources, design deadlines, entering the market in a competitive environment and a conflicting global division of labor. It is noted that at present, machinery and technology have become much more complicated, including inconnection with embedded software. Attention is focused on the fact that forecasting and evaluation of behavior, reliability and management of compliance with the requirements of sociotechnical systems in connection with the nonlinear processes of functioning of human-machine systems and degradation for both regular and non-standard conditions require innovative methods and tools. Attention is drawn to the fact that the creation of technology is accompanied by an increase in interrelated man-made, natural and social risks, the primary sources of which are inadequate information both when creating and using technology. For a wide practical application of risk-oriented design, a methodology, methods for risk management at the stages of the life cycle of equipment, state standards are suggested, as well as ways to identify the significance of damages in existing forms of design, technological, and other documentation for products and manufacturing processes, as well as in new types of documents, for example, in terms of risk management. It is noted that further work is currently being planned for the widespread introduction of a risk-based approach in mechanical engineering and related industries of both individual countries and unions to ensure the effective competitiveness of supply chains.

Модернизация оборудования для транспортировки полипропилена

The article considers the operation principle of the Roots-type gas blowers. The diagram of the airflows from the blower is illustrated. A detailed description of the technological process of gas compression is given. The main actual defects of equipment such as blowers during operation are listed. Repair of equipment includes, as a rule, dismantling, complete disassembly of the flow part of the case and impellers with cleaning from the polymer, replacement of the rotary piston, cleaning tensioned metal points, replacement of rolling bearings and seal rings, as well as turning and mechanical works. The reasons for the defects are considered. Industrial rotary gas blowers transport polypropylene (powder) for its further processing in an adjacent production shop and are important for the shop operation as a whole. During operation, when the ambient temperature exceeds 40°C, heating of the parts and mechanisms of the gas blower exceeds 85°C, which affects the operation of the equipment. It is proposed to use the throttle effect to reduce the gas temperature at the suction stage of the gas blower without using the heat exchange equipment in the technological process. The principle of the Joule-Thompson throttle effect is described. Physical substantiation of the temperature effect of throttling is given, which consists in the ratio of changes in the internal kinetic and internal potential energy of the gas flowing. An inversion curve plot for nitrogen is shown. A list of measures for the maintenance and repair of equipment for pneumatic transportation of polypropylene (powder) is presented.