scholarly journals Modern methods of motor-wheel gearboxe diagnostics of BelAZ dump trucks

2021 ◽  
Vol 315 ◽  
pp. 02017
Author(s):  
Andrey Kudrevatykh ◽  
Andrey Ashcheulov ◽  
Andrey Vinidiktov
Keyword(s):  
Technical Condition ◽  
Spare Parts ◽  
Technological Operation ◽  
Mining Equipment ◽  
Repair Method ◽  
Mining Enterprise ◽  
Modern Methods ◽  
Dump Trucks ◽  
Mining Complex ◽  
The Cost

The most important mining enterprise indicators are the reliability and durability of its equipment. These equipment parameters have the greatest impact not only on the mining complex efficiency, but also on the extracted minerals price, as the equipment downtime, as well as, the cost of repair works and spare parts purchase are included in the cost of coal. Thus, the main goal in improving mining production is to improve the reliability and durability of used equipment. Researches carried out in the coal company ‘Kuzbassrazrezugol’ showed that the largest number of mining equipment downtime, in particular of mining dump trucks, occurs due to unexpected failure of a motor-wheel gearbox. The introduction of the additional technological operation for diagnosing the actual technical condition of gearboxes in the maintenance procedure will allow monitoring the condition of the entire gearbox and, in particular, its components by an in-place repair method. This method consists of continuous or periodic measurement of the vibrations of the operating gearbox mechanisms. The analysis of the unit and its individual parts suitability is carried out on the bases of obtained measurements. This methodology usage at a mining enterprise will significantly reduce the number of equipment downtime and thereby increase its efficiency.

scholarly journals Increasing life of pit dump truck motor-wheel gearboxes by introducing the monitoring of the actual technical condition

2021 ◽  
Vol 6 (4) ◽  
pp. 267-276
Author(s):  
A. A. Khoreshok ◽  
A. V. Kudrevatykh ◽  
A. S. Ashcheulov ◽  
A. V. Vinidiktov ◽  
L. I. Kantovich
Keyword(s):  
Technical Condition ◽  
Dump Truck ◽  
Mining Equipment ◽  
Quality Performance ◽  
Equipment Operation ◽  
Maintenance Service ◽  
Dump Trucks ◽  
Combination Of Methods ◽  
The Cost ◽  
Physical And Chemical

At present, Kuzbass coal strip mines pay great attention to improving quality performance of mining equipment operation, including reliability and durability of components and units. One of the ways of the performance improvement is decreasing number of unforeseen failures. To achieve this purpose a mine dump truck part diagnostics should be introduced into a maintenance service procedure. At the same time the process of diagnostics should not increase the machinery downtime, but effectively reveal a condition of motor-wheel gearboxes in the course of dump truck operation. The aim of the research is to increase the reliability and service life of motor-wheel gearboxes of large BelAZ dump trucks. Failure of a motor-wheel gearbox is a rare phenomenon, but the cost of a new gearbox can vary from 3.5 to 10 million rubles. That is why it is important to implement such methods of diagnostics, which allow revealing the condition of gearboxes in the shortest possible time and without disassembling corresponding units. Determination of the actual technical condition of motor-wheel gearboxes is possible by different methods: vibroacoustic; acoustic; thermal; physical and chemical analysis of spent operating materials. The studies showed that none of these methods can be used as a universal one. When justifying and selecting the most suitable method, different factors should be considered, including technological, or a combination of methods should be applied, which will reduce risks, but at the same time increase costs. It is necessary to develop a better diagnostic method based on the use of several methods simultaneously.

scholarly journals ОРГАНИЗАЦИЯ РЕМОНТНОГО ПРОИЗВОДСТВА ИЗНОСА ДЕТАЛЕЙИ ВИДЫ ВОССТАНОВЛЕНИЯ

2019 ◽  
Author(s):  
D.G. Churilov ◽  
S.D. Polischuk ◽  
Y.A. Stekolnikov ◽  
I.S. Arapov ◽  
A.V. Shemyakin
Keyword(s):  
Regulatory System ◽  
Physical And Mechanical Properties ◽  
Technical Condition ◽  
Spare Parts ◽  
Production Cycle ◽  
Recovery Processes ◽  
Restoration Work ◽  
Working Bodies ◽  
The Cost ◽  
Agricultural Machines

Организацияремонтного производства на основе оптимального использования передовых технологических процессов позволит восстанавливать и упрочнять рабочие органы сельскохозяйственных машин с учетом минимума затрат как на процессы восстановления, так и на функционирование предприятия в целом.При ремонте существуют несколько вариантов: заменить изношенныедетали на новые или произвести восстановление изношенных с доведением и улучшением их физико-механических свойств.Восстановление более предпочтительно. Оно позволяет сокращать время простоя неисправных машин и оборудования, повышать показатели надежности использования машин.Экономика работ по восстановлению заключается в снижении себестоимостиремонтакак агрегатов,так и машин. При этом необходимо восстановить геометрические показатели деталей.Анализ статистики показал,что годных для восстановления деталей до 50 и только до 9 не подлежат восстановлению.По сравнению с изготовлением новых запасных частей количество операций обработки сокращается в 3-8 раз.Важное преимущество восстановления малая металлоемкость. В процессах восстановления требуется на 50-75 меньше металла,чемдля изготовленияновых.Восстановление деталей к импортным машинам можно рассматривать как альтернативу дорогим оригинальным запчастям.При этом должна быть налажена регламентная систематехобслуживания и ремонтасельскохозяйственных машин по фактическому техническомусостоянию. Качестворемонта зависит оторганизации всех звеньев производственногоцикла, воснове которого лежиткомплексмероприятий техническогохарактера.The organization of repair production based on the optimal use of advanced technological processes will make it possible to restore and strengthen the working bodies of agricultural machines, taking into account the minimum costs of both the restoration processes and the functioning of the enterprise as a whole. During repair, there are several options: to replace worn parts with new ones or to restore worn parts with improvement in their physical and mechanical properties. Recovery is more preferable. It makes possible to reduce the downtime of faulty machines and equipment and to increase their reliability. The economics of restoration work is to reduce the cost of repairs of both units and machines. For this, it is necessary to restore the geometric parameters of the parts. The results of statistics showed that up to 50 of parts were suitable for recovery and only up to 9 cannot be restored.Compared with the manufacture of new spare parts, the number of machining operations is reduced by 3-8 times. An important advantage of recovery is low metal consumption. In the recovery processes, 50-75 less metal is required than for manufacturing the new ones. The restoration of parts for imported machines can be considered as an alternative to expensive original spare parts. At the same time, a regulatory system for maintenance and repair of agricultural machines according to the actual technical condition should be established. The quality of repairs depends on the organization of all parts of the production cycle, which is based on a set of technical measures.

scholarly journals Technical Readiness of the Machine-Tractor Aggregate: Statistical Analysis

2020 ◽  
pp. 90-93
Author(s):  
М.М. Юрков ◽  
В.В. Жолудева ◽  
Е.В. Уткин
Keyword(s):  
Technical Condition ◽  
Spare Parts ◽  
Maintenance Costs ◽  
Factors Affecting ◽  
Agricultural Enterprises ◽  
Correlation And Regression Analysis ◽  
Repair Costs ◽  
Machine Operators ◽  
The Cost ◽  
Technical Readiness

В статье проанализированы наиболее существенные факторы, влияющие на техническую готовность тракторов к работе, с помощью математико-статистического моделирования. Исследование проведено на одном из сельскохозяйственных предприятий Ярославской области. Техническая готовность техники зависит от множества субъективных и объективных факторов. В результате исследований авторами было выявлено восемь факторов, влияющих на техническую готовность тракторов (затраты на ремонт и техническое обслуживание (ТО) одного физического трактора за год, руб.; затраты на ТО на один эт. га в год, руб.; стоимость материально-технической базы (МТБ) по ремонту и ТО, приходящаяся на один эт. трактор, тыс. руб.; обеспеченность работающими механизаторами на 100 физических тракторов, чел.; наличие механизаторов, имеющих 1–3 классы квалификации, % к общему количеству; доля услуг предприятий сельхозтехники в затратах на ремонт и ТО, %; затраты на запасные части за один год на один эт. трактор, руб.; доля стоимости узлов и агрегатов при ремонте тракторов, %). Для описания процесса были использованы методы многофакторного корреляционного и регрессионного анализа. Выявлено, что наиболее существенное влияние на результативный признак (коэффициент технической готовности тракторов) оказывает величина затрат на ТО в расчёте на один эт. га в год и наличие механизаторов, имеющих 1–3 классы квалификации. Применение предложенной методики, по мнению авторов, обеспечит не только определение технического состояния агрегатов и механизмов, но и сократит время простоя техники, снизит затраты на ТО и технический ремонт, а также на расход запасных деталей и материалов и повысит производительность труда. The article analyzes the most significant factors affecting the technical readiness of tractors for work using mathematical and statistical modeling. The research was carried out at one of the agricultural enterprises of the Yaroslavl region. Technical readiness of machinery depends on many subjective and objective factors. As a result of the research the authors identified eight factors affecting the technical readiness of tractors (repair and maintenance costs (maintenance) of one physical tractor per year, Rub.; maintenance costs per reference unit ha per year, Rub.; the cost of the material and technical base (MTB) for repair and maintenance which is accounted for by reference tractor, RUB, in thousands; provision of working machine operators for 100 physical tractors, people; the presence of machine operators with 1–3 qualification classes, % of the total number; share of agricultural equipment services in repair and maintenance costs, %; service parts costs per year per reference tractor, Rub..; share of components and assemblies cost during tractor repair, %). Multifactor correlation and regression analysis techniques were used to describe the process. It was revealed that the most significant impact on the effective feature (tractor technical readiness factor) is the amount of maintenance costs calculated per reference ha per year and the presence of machine operators with 1–3 qualification classes. The application of the proposed technique according to the authors, will ensure not only the determination of the technical condition of units and mechanisms, but also reduce the out-of-service time of equipment, reduce maintenance and technical repair costs, as well as the consumption of spare parts and materials and increase labor productivity.

A study on the causes of refusals of foreign and domestic logging equipment

2016 ◽  
Author(s):  
В.А. Марков ◽  
В.И. Кретинин ◽  
А.Н. Марков ◽  
В.А. Соколова ◽  
П.А. Гайдукова ◽  
...  
Keyword(s):  
Service Life ◽  
Russian Federation ◽  
Human Factor ◽  
Spare Parts ◽  
Engineering Industry ◽  
Field Conditions ◽  
Suitable Material ◽  
Repair Method ◽  
Modern Methods ◽  
The Russian Federation

На территории Российской Федерации с каждым днем неуклонно увеличивается число зарубежной лесной техники, требующей ремонта или технического обслуживания. Учитывая тот факт, что некоторые детали лесозаготовительной техники имеют покрытие из малоприменяемых в отечественном машиностроении материалов (композитных сплавов, включающих титан, молибден и другие металлы), при их ремонте могут возникнуть затруднения, касающиеся как непосредственно выбора способа восстановления, так и выбора подходящего материала покрытия. Рассматриваются причины отказов отечественных и зарубежных лесных машин как в гарантийный период, так и в период после гарантии, а также особенности их возникновения. По данным производителей техники и дилеров установлено, что большинство отказов происходит из-за человеческого фактора, также причинами отказов являются неоригинальные запчасти, естественный износ деталей и заводской брак. Срок службы отремонтированных машин, как правило, не превышает 50-60% от нормативных показателей, зачастую это связано с неправильным выбором способа восстановления, материала для восстановления или нарушением технологического процесса нанесения покрытия. Необходима разработка современных способов восстановления деталей с номинальным или повышенным ресурсом, что впоследствии даст возможность ремонта сложных узлов и деталей на отечественных ремонтных заводах в регионах, насыщенных иностранной лесозаготовительной техникой. Восстановление большинства деталей зарубежной техники невозможно в полевых условиях и без специальной подготовки и оборудования и должно проводиться на ремонтных заводах. Для решения этой задачи необходим выбор соответствующих современных материалов и оборудования, а также подготовка рабочих кадров на ремонтных предприятиях. In the territory of the Russian Federation every day the number of the foreign forest equipment demanding repair or maintenance steadily increases. Considering the fact that some details of logging equipment have a covering from the small materials (the composite alloys including in the structure the titan, molybdenum and other metals) applied in domestic engineering industry, at their repair there can be difficulties concerning as directly the choice of a way of restoration, and the choice of suitable material of a covering. According by data from machines factory and dealers, was found that, most refusals causes of human factor, also of non-original aftermarket spare parts and natural wear of parts, finally because of defective factory parts. Life of repaired machines normally does not exceed 50-60% of standard indicators, often it is causes by wrong choice of repair method, material for repair or by violation of the process of repair coating. Necessary to develop modern methods of parts repair to get nominal or increased service life, which later give us the opportunity of repair possibility of difficult assemblies and their parts on the Russian repair factories. Restoration of the majority of details of foreign equipment is impossible in field conditions and without special preparation and the equipment, and has to be made at repair plants. The choice of the corresponding modern materials and the equipment, and also preparation of personnel at repair shops is necessary for the solution of this task.

scholarly journals Digitalization and use of artificial intelligence technologies in technical modernization of the agro-industrial complex

2021 ◽  
Vol 291 ◽  
pp. 04006
Author(s):  
Ivan Grigorievich Golubev
Keyword(s):  
Artificial Intelligence ◽  
Crop Production ◽  
Agricultural Sector ◽  
Combustion Engine ◽  
Physical And Mechanical Properties ◽  
Technical Condition ◽  
Spare Parts ◽  
Industrial Complex ◽  
Agricultural Machinery ◽  
The Cost

The article presents the prospects of digitalization and use of artificial intelligence technologies in the technical modernization of the agro-industrial complex (AIC). In order to improve the efficiency of agricultural industry, including the productivity and quality of products in such sectors as crop production, livestock, processing of agricultural products, a transition to innovative technologies is required. Their use in agricultural production makes it possible to significantly competitiveness of the agricultural sector of the economy of the Russian Federation. To do this, the technical modernization of the agro-industrial complex, which provides for the renewal of its base with domestic agricultural machinery is required. In modern machines, a large number of electronic systems with various sensors are involved. They allow to control the operation of various units, including the internal combustion engine, transmission, work tools and other mechanisms. The use of such systems makes it possible to reduce the cost of maintenance and use of equipment, to monitor the modes of operation and technical condition of equipment around the clock, to conduct repair and maintenance activities as required. The current global trend is the use of remote machine diagnostics systems. They allow service centers and emergency support to diagnose a vehicle at a distance, reducing downtime. In recent years, there has been a trend towards digital solutions in machine maintenance. 3D technologies are promising for repair of agricultural machinery, including restoration and hardening of parts. They can be used to measure the geometric dimensions and determine the physical and mechanical properties of part faces of agricultural machines during the incoming inspection of spare parts and fault detection of parts, by scanning them. The introduction of digital technologies and artificial intelligence in the repair practice will reduce the duration of repair and maintenance actions during the technical service of agricultural machinery and significantly reduce the cost of their implementation.

scholarly journals Improving the Efficiency of a Mining Enterprise by Coordinating Production Processes

2020 ◽  
Vol 174 ◽  
pp. 01059
Author(s):  
Alexey Tyurin ◽  
Ildar Kuvataev
Keyword(s):  
Coal Mine ◽  
Mining Industry ◽  
Dynamic Programming Method ◽  
Production Cycle ◽  
Mining Equipment ◽  
Production Processes ◽  
Mining Enterprise ◽  
Level Model ◽  
The Cost ◽  
Two Level Model

To improve the efficiency of the mining industry, it is necessary to coordinate all production processes, which allows reducing unproductive downtime of mining and transport equipment, increasing their productivity, and reducing the cost of operations at all stages of the production cycle. To achieve this result, the article uses a systematic approach to consider the features of planning the work of all departments of the coal mine, starting with drilling and blasting operations on the sites and ending with the shipment of finished products to consumers. Based on the example of JSC “Chernigovets” in the Kemerovo region, the article considers a two-level model for planning the work of all divisions of the enterprise for a month, taking into account the dynamics of resource use of production and transport sections. Taking into account the uneven performance of production operations and the wide variety of mining equipment used at the stages of preparation, excavation, excavation, transportation, processing and shipment of finished products to external rail transport, it is possible to use a hierarchical two-level system with aggregation of processes at the first level and their detail at the second level. Using the dynamic programming method allowed us to solve the problem of planning the activities of all divisions of the enterprise at the first level and identify the boundaries of changes in the planned indicators at the second level, which do not worsen the results achieved at the first level. The proposed method of planning the operation of the mine will allow you to quickly track the achieved indicators, compare them with the planned ones and, if necessary, adjust the work of the enterprise’s divisions in real time to achieve the best performance indicators of the coal mine as a whole.

Refinement of the formula for assessing the wear rate of excavator teeth

2019 ◽  
Vol 24 (2) ◽  
pp. 11-15
Author(s):  
Dmitrii U. Kritskii ◽  
M. Pantelik ◽  
Petr A. Pobegailo ◽  
Irina V. Gadolina ◽  
L. Papić
Keyword(s):  
Experimental Data ◽  
Wear Rate ◽  
Practical Interest ◽  
Real Data ◽  
Operational Reliability ◽  
Spare Parts ◽  
Mining Equipment ◽  
Global Trend ◽  
Great Practical Interest ◽  
Mining Complex

On the basis of the experimental data obtained during the observation of the operational reliability of mining excavators, the authors clarified the formula for assessing the abrasive wear rate of rotary excavator bucket teeth under the conditions of a specific coal mining complex in Siberia (Krasnoyarsk, Russia). Despite the fact that, in accordance with the global trend, the production of hydrocarbon carriers should be reduced, and in some countries, coal production has already been stopped (Germany), the energy sector of many countries is still to a great extent based on the use of coal. In this regard, improving the reliability of mining equipment is of great practical interest. To assess the reliability, predict the time to replace parts and plan the volume of production of spare parts, it is important for engineers to have the method for wear rate estimation. The method for this estimation, known since 1986, [1] was modified by the authors to clarify the defining constant in the equation. The clarification was made on the basis of experimental data, with the use of information from the literature and on the basis of experts’ recommendations. Real data concerning the reliability and wear rate were used.

Modern Methods for Assessing the Technical Condition of Building Engineering Systems

2020 ◽  
pp. 36-39
Author(s):  
A.A. Davidyuk ◽  
◽  
E.A. Artemiev ◽  
S.А. Streltsov ◽  
R.S. Voskanyan ◽  
...  
Keyword(s):  
Russian Federation ◽  
Objective Assessment ◽  
Technical Condition ◽  
Engineering Systems ◽  
Regulatory Document ◽  
Operational Capabilities ◽  
Modern Methods ◽  
Maximum Improvement ◽  
The Russian Federation ◽  
Building Engineering

On the basis of the results of many years work in the inspection of engineering systems of buildings and structures, the presented work reflects aspects of obsolescence or imperfection of the regulatory document of the Russian Federation GOST 31937–2011 «Buildings and structures. Rules for inspection and monitoring of technical condition» in part of section 5.4. The types of work that are not taken into account in the GOST, but are necessary when inspecting for an objective assessment of the technical condition of engineering systems and the possibility of further trouble-free operation are considered. The authors propose modern inspection methods that make it possible, due to the instrumental tools used, to more accurately determine the operational capabilities of systems, identify hidden shortcomings and further develop optimal measures with the maximum improvement of indicators for financial expenses for major repairs of systems as a whole or individual elements.

THE TECHNICAL CONDITION OF THE SURVEYED HYDRAULIC UNITS IN THE MOSCOW REGION AND THE CLASSIFICATION FEATURES OF THEIR RESERVOIRS

2021 ◽  
pp. 69-79
Author(s):  
V. V. GRITSAN ◽  
Keyword(s):  
Technical Condition ◽  
Moscow Region ◽  
Risk Level ◽  
Ecological Framework ◽  
Safety Level ◽  
Repair Work ◽  
Hydraulic Unit ◽  
Technical Parameters ◽  
Characteristic Features ◽  
The Cost

The article presents the results of surveys of 311 class IV hydraulic structures carried out in 2016-2020 in the Moscow region. All the reservoirs of the surveyed hydraulic units were classified according to their characteristic features, the technical condition of culverts and dams was assessed, there was established the safety level of both separate structures and hydraulic units as a whole. During the surveys, the technical parameters of the surveyed structures were established, the state of each structure and the hydraulic unit as a whole was assessed, a possibility of their accident and a risk level for the downstream areas were considered. At the same time, recommendations were developed for the elimination of serious damage and, with the help of an examination, the amount of the cost of the necessary repair work was determined. The paper also assesses the issues of the ecological state of the areas where the hydraulic units are located and the hydraulic units themselves as blocks of the ecological framework of the territories.

Theoretical and methodological approaches to the calculation of planned costs for maintenance of service vehicles of the road works customer

2021 ◽  
Vol 2021 (23) ◽  
pp. 20-30
Author(s):  
Taras Pechonchyk ◽  
◽  
Vitaliy Ivanchenko ◽  
Keyword(s):  
Customer Service ◽  
Planning Process ◽  
Spare Parts ◽  
Cost Estimates ◽  
The Road ◽  
Fleet Composition ◽  
Cost Planning ◽  
Methodological Approaches ◽  
The Cost ◽  
Service Vehicles

AbstractIntroduction. Effective management of road indstry is particularly important in conditions of limited funding, as it is not possible to provide adequate funding of the economic entity that has the functions of a customer service. The cost of the customer service maintenance depends directly on the compliance with applicable regulations for these works cost determination. One of the aspects that form a considerable part of the costs of customer service is the maintenance of service vehicles.Problem Statement. Road services in the regions (hereinafter RSR) are the recipients and managers of the funds from the State Budget of Ukraine that are directed for the development and maintenance of public roads of state importance, being as well the asset holders of these roads. To perform their functions, the RSR have vehicles on their balance, the use of which involves a number of costs, including fuel and lubricants, repair, maintenance, replacement of tires, etc. The most important of the steps involved in setting the costs of vehicle maintenance is the process of cost planning. Planning has to be based on the structure of the vehicle fleet (own or leased), functional responsibilities and scope of road works.Planning is carried out for vehicles on the balance of the RSR, as well as for leased vehicles. In the case of leasing, the costs mentioned above are added by the vehicles leasing costs. These costs must be forecasted, justified and performed within the approved cost estimates of the customer service expenses.Purpose. The purpose of the article is to highlight the theoretical and methodological approaches to the calculation of planned costs for the maintenance of service vehicles of the road works customer.Materials and methods. Dialectical methods of knowledge, such as analysis and synthesis of fleet composition characteristics and approaches to cost planning methods, as well as induction, were used in writing the article to explore some aspects of the process of calculating the planned cost of maintenance of the road works customer's service vehicles.Results. The study highlights and describes the main approaches to the calculation of planned costs for the maintenance of service vehicles of the road works customer. The methodology of calculation of planned costs for the maintenance of service vehicles is explored.Conclusions. The introduction of a clear methodology and analytical toolkit for calculating all necessary expenditure items for the maintenance of the road works customer's vehicles in the cost planning process will establish the implementation of a clear mechanism for calculating the planned costs of maintenance of the road works customer's vehicles. It will also provide an automated information-analytical complex for planning of cost estimates, with information entry and reporting in standard forms and possibility of prompt response to changes in fleet composition, needs for spare parts, repairs or other expenses for the maintenance of service vehicles and making changes in cost estimates.Keywords: motor vehicles, costs, cost planning, customer service, maintenance of service vehicles

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