scholarly journals TECHNICAL DIRECTIONS OF MAINTENANCE OF WORKING CAPACITY OF ARMOURED VEHICLES OF THE NATIONAL GUARD OF UKRAINE

2021 ◽  
Vol 1 (37) ◽  
pp. 89-95
Author(s):  
I. Shasha ◽  
Keyword(s):  
National Guard ◽  
Road Transport ◽  
Operating Conditions ◽  
Repair System ◽  
System State ◽  
Working Capacity ◽  
Territorial Defence ◽  
Maintenance And Repair ◽  
Special Operations ◽  
Design And Manufacture

Maintenance of armoured vehicles in modern conditions has a significant impact on the effectiveness of combat missions. In particular, the timeliness of delivery of personnel and necessary cargo can be a critical parameter for the success of tasks in emergencies of man-made and natural origin, riots, participation in special operations for searching for and neutralizing armed criminals, eliminating illegal armed groups or performing territorial defence tasks. A complex characteristic of any technical system is its efficiency as a measure of the feasibility of solutions adapted to operating conditions. Assessing the effectiveness of armoured vehicles is associated with the need to predict performance, which directly depends on the application of modern technical areas to maintain the required level of performance. The efficiency of the system - the ability to perform its functions with a certain level of quality during the established period of operation. The efficiency of the system is determined by the set of its properties, laid down in the design and manufacture and maintained during operation. In this work, the criterion of effectiveness is to maintain the efficiency of armoured vehicles at the required level in service and combat use in a variety of road, transport and atmospheric-climatic operating conditions. Strategies and tactics for maintaining armoured vehicles performance at the required level are considered. The specificity of the operation of armoured vehicles is that it is used in different, sometimes very difficult conditions. Therefore, an individual approach is required, an adaptive maintenance and repair system state of armoured vehicles. The most expedient for armoured vehicles is a balanced combination of all levels of regulation of the systems of organization of maintenance and repair.

Status of car-care center market and design of its facilities

10.12737/6499 ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. 9-12 ◽  
Author(s):  
Ибляминов ◽  
Fanil Iblyaminov ◽  
Асадуллин ◽  
Enver Asadullin ◽  
Закирова ◽  
...  
Keyword(s):  
Growth Rate ◽  
Service Life ◽  
Care Center ◽  
Road Transport ◽  
Repair System ◽  
Working Capacity ◽  
Maintenance And Repair ◽  
Vehicle Operation ◽  
Organization Of Production

Organization of production of the maintenance and repair of machines is the most important subsystem of the transport system, which largely determines the efficiency of road transport usage. The service life of a vehicle is determined by the quality of ego maintenance and conditions, ensuring to realize the functionality, i.e. maintaining working capacity and recovery of technical conditions, safety and elimination of harmful consequences of vehicle operation. The growth rate of motor pool is ahead of the development of maintenance and repair system.

scholarly journals Improvement of maintenance and repair system of internal combustion engines of automotive equipment

2021 ◽  
Vol 341 ◽  
pp. 00062
Author(s):  
Leonid Savin ◽  
Alexander Stetsenko ◽  
Vladimir Panyushkin
Keyword(s):  
Internal Combustion Engines ◽  
Road Transport ◽  
Operating Conditions ◽  
Time Interval ◽  
Repair System ◽  
Time To Failure ◽  
Operation Performance ◽  
Deterministic Models ◽  
Reliability Indicators ◽  
Time Drift

The paper analyzes the operating conditions of road transport affecting its reliability. It is concluded that it is necessary to develop scientifically based strategies flexible of AE maintenance based on predicting the failure moment by extrapolating the process of time drift of the informative parameters of the AE at the interval of its intended use. To solve this problem, we propose an approach based on the use of quasi-deterministic models of the time drift of the AE parameters, which allow to obtain analytical expressions for the main reliability indicators -density of the distribution time to failure and the probability of failure -free operation at a given time interval. On the basis of these indicators of reliability in operation, performance indicators have been formed allowing determining of the optimal maintenance frequency. In the final part of the article, the author proposes an algorithm and a methodology that allows organizing flexible strategies for AE maintenance, considering special conditions of its operation.

scholarly journals IMPROVEMENT OF THE REPAIR SYSTEM OF AUTOMOTIVE VEHICLES OF THE NATIONAL GUARD OF UKRAINE

2021 ◽  
Vol 1 (37) ◽  
pp. 52-59
Author(s):  
P. Buryak ◽  
◽  
�. Parkhomchuk ◽  
Ye. Buryak ◽  
◽  
...  
Keyword(s):  
National Guard ◽  
Repair System ◽  
Maintenance And Repair ◽  
Recovery System ◽  
Operation Group ◽  
The Military ◽  
Military Units

In the military units of the National Guard of Ukraine, a system for repairing automotive vehicles has been introduced, which provides for current, secondary and overhaul repairs. Maintenance of machines is carried out in order to eliminate malfunctions arising from the use of machines, and allows the replacement of individual units, including the main one. The average repair consists in the replacement or overhaul of not more than half of the main units. Overhaul restores the life of the machine and should be carried out at specialized enterprises of the Ministry of Defense of Ukraine or at other enterprises under contracts. Actually, in the military units of NGU, only current repairs are carried out. This is due to the high cost of overhaul and its low quality. Therefore, for the military units of the NGU, a diagnostic and recovery system for repairing automotive vehicles is proposed, including two types of repair: maintenance and restoration. The essence of maintenance repair consists in eliminating malfunctions, violations of adjustments during the operation of the machines according to the inspection, listening ? diagnostics with built-in and external diagnostic devices. Reconditioning repair consists in carrying out repair operations related to disassembling, troubleshooting, mechanical or other processing of component parts, assembling units, assemblies, testing them, and, if necessary, replacing them with new or repaired ones. Maintenance and repair repairs of automotive equipment are carried out only if there is a need for their implementation. It is proposed to establish ten parameters of the diagnostic and recovery system for the repair of automotive equipment at NGU and determine the life of the machine only before being discarding. The procedure for determining the number of machines that must be written off and get new ones to increase the non-reduced resource in each operation group is given.

scholarly journals Monitoring the Technical Condition of AC Electric Locomotives using Traction Energy Consumption Rates

2021 ◽  
Vol 18 (5) ◽  
pp. 62-89
Author(s):  
A. P. Semenov ◽  
V. V. Semchenko ◽  
I. Yu. Khromov
Keyword(s):  
Technology Implementation ◽  
Reactive Power ◽  
Electricity Consumption ◽  
Technical Condition ◽  
Operating Conditions ◽  
Repair System ◽  
Dynamic Data ◽  
Maintenance And Repair ◽  
Institute Of Technology ◽  
General Director

Currently, the methods of monitoring the technical condition of locomotives using data of on-board microprocessor-based control systems are widely used. This monitoring of Russia has become an operating technology of the locomotive maintenance and repair system.The main problem of monitoring is the limited set of sensors in locomotive circuits. Increased number of sensors leads to a decrease in reliability and to an increase in the cost of a locomotive and of its life cycle, while allowing to achieve better quality of diagnostic information.Besides, it is advisable to have integrated indicators of the technical condition of a locomotive. The article presents a computer software product for analysing the technical condition of a locomotive based on dynamic data on consumption of traction active power and generation of reactive power. The software was developed by using algorithmic language Visual BASIC for Applications, embedded in MS Excel, using probabilistic and statistical methods of analysis.The method for diagnosing the technical condition of a locomotive within the monitoring system is based on a comparison of dynamics of consumption of active and generation of reactive power by two sections of the same locomotive according to the principle of functional benchmarking. For monitoring the technical condition of locomotives, the term «pre-failure» is suggested, which is defined as the operable condition of a locomotive while there are internal hidden defects or damage. Pre-failure manifests itself in power consumption. To analyse the technical condition of AC electric locomotives in terms of electricity consumption, the initial data must have a high degree of unimodality, which is determined by uniformity of operating conditions.The resulting data obtained following the analysis of the technical condition of a locomotive based on the dynamic data on consumption of tractive active energy and generation of reactive power can be used to determine a defect that causes a change in consumption of electricity at the moment when the locomotive enters technical maintenance and repair depot. *Information about the authors: Semenov, Alexander P. – Ph.D. (Eng), General Director of JSC Research Institute of Technology, Control and Diagnostics of Railway Transport, Omsk, Russia, [email protected]. Semchenko, Victor V. – Ph.D. (Eng), General Director of JSC Railroad Centre of Technology Implementation of Krasnoyarsk Railway, Krasnoyarsk, Russia, [email protected]. Khromov, Igor Yu. – Business Analyst of LLC2050-Integrator, Moscow, Russia, [email protected]. Article received 13.05.2020, accepted 23.10.2020. For the original Russian text of the article please see p. 62. 

scholarly journals Influence of the main operational factors on the working capacity of a mining hydraulic excavator

2021 ◽  
Vol 326 ◽  
pp. 00007
Author(s):  
Abdelwahab Agaguena ◽  
Danila Chishegorov ◽  
Sergey Ivanov ◽  
Alexander Mikhailov
Keyword(s):  
Early Identification ◽  
Operating Conditions ◽  
Hydraulic Excavator ◽  
Mining Engineering ◽  
Working Capacity ◽  
Maintenance And Repair ◽  
Hydraulic Mining ◽  
Factors Influencing ◽  
Operational Factors

The analysis of factors influencing the failures of a mining excavator is substantiated. The classification of factors and methods of dealing with them will have a great importance in mining engineering. The article considers an example of the influence of various factors on the lifting mechanism of a hydraulic mining excavator. Thanks to the early identification of the most influencing factors on a mining excavator, it will be possible to manage the equipment maintenance and repair under actual conditions and operating conditions.

Methodical approach to the development of regulations of maintenance and repair of crushing equipment of mining companies

2020 ◽  
pp. 543-556
Author(s):  
A. G. Zhuravlev ◽  
M. A. Chendyrev ◽  
V. A. Cherepanov ◽  
I. A. Glebov
Keyword(s):  
High Performance ◽  
Operating Time ◽  
Operating Conditions ◽  
Repair System ◽  
Maintenance And Repair ◽  
Time Between Failures ◽  
Methodical Approach ◽  
Ore Preparation ◽  
Source Data ◽  
Repair Cycle

Crushing equipment is one of the key for mining enterprises, as it provides ore preparation for subsequent mineral processing. Recently, the issue of increasing the productivity of the crushing site at existing enterprises without radical reconstruction is relevant. The solution is the installation of high performance crushers and the optimization of the maintenance and repair system in order to ensure maximum availability and utilization in time. The article presents the experience of developing a methodology for constructing a strategy for maintenance and repairs (MRO) for crushing equipment. The experience of developing technological routine MRO for crushers manufactured by PJSC Uralmashzavod was taken into account.The problem of the collection, processing of source data and their analysis is considered to obtain reliable statistics on the time between failures of parts and components of crushers.Reflected are the features of the analysis of data on the operating time of assemblies and parts for failure during the service life for various operating conditions.Differentiation of the operating conditions of crushing equipment at mining enterprises is considered, which made it possible to formulate standardized repair cycles for several groups of operating conditions.A technique has been developed to form the structure of repair cycles of crushing equipment.Options for choosing a strategy for building a repair cycle are proposed. The quantity, periodicity and composition of MRO are determined.

Research on the Structural Performance of Large-Tonnage Gantry Crane

2013 ◽  
Vol 823 ◽  
pp. 247-250
Author(s):  
Jie Dong ◽  
Wen Ming Cheng ◽  
Yang Zhi Ren ◽  
Yu Pu Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Theoretical Calculations ◽  
Complex Structure ◽  
Early Period ◽  
Operating Conditions ◽  
Structural Performance ◽  
Gantry Crane ◽  
Element Analysis ◽  
Design And Manufacture

Because of the huge lifting weight and complex structure of large-tonnage gantry crane and in order to effectively design and review it, this paper aims to carry out a research on its structural performance based on the method of theoretical calculation and finite element analysis. During the early period of design, the method of theoretical calculations is adopted, and after specific design it comes the finite element analysis, so as to get the results of analysis under a variety of operating conditions, which illustrates that the structural design and review of large-tonnage gantry crane based on theoretical calculations and finite element are feasible, and also verifies that the method of finite element is an effective way to find a real dangerous cross-section, thus providing the basis for the design and manufacture of the crane structure.

scholarly journals The method for increasing the efficiency of equipment’s maintenance in railway traction power supply systems

2018 ◽  
Vol 47 (3) ◽  
pp. 39-47 ◽  
Author(s):  
Oleksandr Matusevych ◽  
Valeriy Kuznetsov ◽  
Viktor SYCHENKO
Keyword(s):  
Power Supply ◽  
Operational Reliability ◽  
Technical Condition ◽  
Repair System ◽  
Maintenance And Repair ◽  
Traction Substations ◽  
Electric Equipment ◽  
Traction Power Supply ◽  
Supply Systems ◽  
Traction Power

Purpose. To develop the method for increasing the efficiency of the equipment’s maintenance and repair system, ensuring necessary level of operational reliability of the equipment, safety and reliability of the electric equipment with minimal expenses on operation. Relevance. Aging of the power equipment in railway power supply systems sharply raised a need for assessment of its states and degree of risk for operation outside rated service life. In critical conditions of technological processes and operational modes of the railways it is necessary to increase the equipment’s operational reliability. The scheduled maintenance and repair system whose main technical and economic criterion is the minimum of equipment’s downtimes on the basis of a rigid regulation of repair cycles, in the conditions of market regulations in the field of repair in many cases does not provide the optimal decisions due to insufficient financing. The solution of this problem is possible by improvement of the maintenance and repair system. Under these conditions the main direction for supporting the operational reliability of power electric equipment on TS is a development of the modern methods based on individual supervision over real changes of technical condition of power equipment. Scientific novelty. In this article the authors proposed an integrated approach, on the basis of which can be developed the effective maintenance and repair system for traction power supply systems. Proposed approach allowed to react quickly to changes of service conditions on traction substations, to control the technical condition of power electric equipment under the conditions of uncertainty, to establish interrelation between quality of service and operational reliability of the equipment, to choose a service strategy on traction substations. Practical importance. The validity of the developed method was confirmed by the results of calculations and practically by choosing the optimal maintenance's option for transformer TDTN-25000/150-70 U1 (ТДТН-25000/150-70 У1) on traction power supply substation.

scholarly journals Analysis of exhaust emission measurements in rural conditions from heavy-duty vehicle

2020 ◽  
Vol 182 (3) ◽  
pp. 54-58
Author(s):  
Andrzej Ziółkowski ◽  
Paweł Fuć ◽  
Piotr Lijewski ◽  
Łukasz Rymaniak ◽  
Paweł Daszkiewicz ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Road Transport ◽  
Exhaust Emissions ◽  
Operating Conditions ◽  
Transport Sector ◽  
Exhaust Emission ◽  
Heavy Vehicles ◽  
Heavy Duty Vehicle ◽  
Emission Norm ◽  
Test Route

Road transport holds for the largest share in the freight transport sector in Europe. This work is carried out by heavy vehicles of various types. It is assumed that, in principle, transport should take place on the main road connections, such as motorways or national roads. Their share in the polish road infrastructure is not dominant. Rural and communal roads roads are the most prevalent. This fact formed the basis of the exhaust emissions and fuel consumption tests of heavy vehicles in real operating conditions. A set of vehicles (truck tractor with a semi-trailer) meeting the Euro V emission norm, transporting a load of 24,800 kg, was selected for the tests. The research was carried out on an non-urban route, the test route length was 22 km. A mobile Semtech DS instrument was used, which was used to measure the exhaust emissions. Based on the obtained results, the emission characteristics were determined in relation to the operating parameters of the vehicles drive system. Road emission, specific emission and fuel consumption values were also calculated.

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