scholarly journals Effect of aerodynamic loads on redistribution of normal reactions of quarry dump trucks tires

2020 ◽  
Vol 174 ◽  
pp. 03018
Author(s):  
Mikhail Dadonov ◽  
Alexander Kulpin ◽  
Valery Borovtsov ◽  
Anar Zhunusbekova
Keyword(s):  
Normal Load ◽  
Operating Conditions ◽  
Dump Truck ◽  
Early Failure ◽  
Aerodynamic Loads ◽  
Truck Tires ◽  
Dump Trucks ◽  
And Control ◽  
Mine Dump

Tires of quarry dump trucks occupy one of the leading places in the item of costs for motor transport, as they are expensive product and at the same time more than half of them do not generate their resource. The causes of premature tires failure are exceeding normal load on them. In turn, the aerodynamic forces effect on the quarry dump truck as one of the influencing factors, is the dynamic redistribution of normal loads on tires and, as a result, affects temperature modes. The determination of the load on the tire under different operating conditions will increase the service life of the tires and avoid early failure. The proposed calculation method of aerodynamic loads and their influence on redistribution of normal mine dump truck tires reactions in dynamics allows to make correction to load modes and control the tires resource, which will lead to more complete use of tires resource.

scholarly journals Influence of undefined modes of movement on instantaneous redistribution of normal reactions of quarry dump truck tires

2021 ◽  
Vol 315 ◽  
pp. 03014
Author(s):  
Mikhail Dadonov ◽  
Alexander Kulpin ◽  
Evdokia Kulpina ◽  
Valery Borovtsov ◽  
Gulzira Mukasheva
Keyword(s):  
Normal Load ◽  
Ambient Air ◽  
Climatic Conditions ◽  
Operating Conditions ◽  
Dump Truck ◽  
The Road ◽  
Truck Tires ◽  
Non Linear ◽  
Main Thing ◽  
The Impact

Reducing the costs of rock transportation in mining is one of the most important tasks. One of the reserves for solving this issue is a more complete use of the service life of quarry dump trucks tires, since their operation takes place in heavy mining and climatic conditions and this significantly reduces the life of tires. The life of tires depends on many factors: speed of movement, compliance with the recommended air pressure in the tire, ambient air temperature, but the main thing is the change in the normal load on the wheel, which depends on the redistribution of the quarry dump truck weight in case of non-linear movement and on the longitudinal profile of the quarry road. In real conditions, the quarry dump truck moves unevenly due to the complexity of the road - either braking or acceleration occur. This article allows you to evaluate the impact of non-linear modes of quarry dump truck movement on the instant redistribution of normal tire reactions and take into account peak loads on wheels during acceleration and braking in the regular cycle. This will allow you to control the load on the tires directly by cargo amount in the quarry dump truck and thereby increase the life of the tires and their reliability, as well as reduce the cost of transporting the rock mass in real operating conditions.

scholarly journals Distribution of Static Normal Reactions to Wheels of Open-Pit Dump Trucks Depending on the Longitudinal and Cross Sections of the Open-Pit Road

2019 ◽  
Vol 105 ◽  
pp. 03009
Author(s):  
Michail Dadonov ◽  
Alexander Kulpin ◽  
Oleg Ostanin ◽  
Erkin Suleimenov
Keyword(s):  
Rock Mass ◽  
Cross Sections ◽  
Normal Load ◽  
Operating Conditions ◽  
Open Pit ◽  
Dump Truck ◽  
Mass Transportation ◽  
Premature Failure ◽  
Dump Trucks ◽  
The Cost

Vehicle costs for rock mass transportation are more than 50% of total costs, among which 25 — 30% are tire costs. The average tire life in mining enterprises is lower than that the value recommended by production plants. The tire life of open-pit dump trucks is more dependent on the normal load on the wheel. The main factor in the change of the normal load is location of the wheel on the dump truck and the open-pit road’s section. Determination of the maximum loaded tire in different operating conditions will allow increasing the tire life and preventing its premature failure. The TKPH index (tire performance) recommended by tire manufacturers does not take into account the diversity of mining conditions and variations of sections of open-pit roads on different routes. The average load per trip is defined as movement of a loaded open-pit truck and an empty open-pit truck on a straight reach of a road. The proposed method for recording of redistribution of the load on the wheel allows making adjustments to recording of TKPH indexes and thereby effectively managing the tire life, which in turn will make it possible to more fully use the tire life, increase its reliability and reduce the cost of rock mass transportation.

scholarly journals Influence of tire temperature conditions on the capacity of quarry dump trucks operated in JSC "CC Kuzbassrazrezugol"

2021 ◽  
Vol 315 ◽  
pp. 03013
Author(s):  
Alexander Kulpin ◽  
Mikhail Dadonov ◽  
Evdokia Kulpina ◽  
Valery Borovtsov ◽  
Zhanar Kaisanova
Keyword(s):  
Temperature Regime ◽  
Load Capacity ◽  
Operating Conditions ◽  
Open Pit ◽  
Dump Truck ◽  
Main Mode ◽  
Utilization Factor ◽  
Operating Modes ◽  
Truck Tires ◽  
Dump Trucks

More than 50-60% of minerals in Russia and the CIS countries are mined in an open-pit or in mining quarry, as it is the most economical and productive. JSC "CC Kuzbassrazrezugol" ranks second in terms of total coal production among the regions of the Russian Federation and first in Kuzbass. Quarry dump trucks are the main mode of technological transport when transporting mined rock. An important task facing road transport is to reduce the cost of transported products. The components of the costs include fuel, tires, maintenance and repair, maintenance of roads and others. It is possible to reduce tires costs by controlling tires life. Most often, thermal damage causes the emergency decommissioning of tires. It is possible to maintain the optimal temperature regime of quarry dump truck tires with the help of operating modes such as load capacity utilization factor and speed, as well as operating conditions such as ambient temperature and longitudinal slope of the road. In turn, the performance of quarry dump trucks directly depends on the operating modes. On the one hand, the growing utilization factor of load capacity and speed increase the productivity of quarry dump trucks, but at the same time this increases the temperature regime and reduces their reliability. This article proposes a methodology for determining the maximum productivity of quarry dump trucks operated in CC Kuzbassrazrezugol taking into account the temperature regime of tires.

Experimental testing of open pit dump trucks in operating conditions

2020 ◽  
pp. 530-542
Author(s):  
A. G. Zhuravlev ◽  
M. V. Isakov
Keyword(s):  
Power Plants ◽  
Experimental Testing ◽  
Operating Conditions ◽  
Open Pit ◽  
Dump Truck ◽  
Experimental Measurements ◽  
Complex Data ◽  
Special Unit ◽  
Operating Modes ◽  
Dump Trucks

The high importance of optimizing the operation of quarry transport is confirmed by the leading share of its costs in the total cost of mining. The current direction of optimization is the development and implementation of digital technologies for processing complex data on the parameters of transport vehicles. The solution of the above issues should be based on the results of scientific research on the collection and processing of information. Developed a set of techniques to perform experimental measurements of working parameters of mining dump trucks as part of a special unit experiments, and long monitoring measurements. A set of equipment for performing experimental measurements, as well as its installation on a dump truck is presented. The data of experimental measurements and a methodical approach to their analysis are presented. In particular, it shows the identification of operating modes of the power plant and the construction of the load diagram, the identification of elements of the transport cycle, etc. The approach to substantiation of innovative designs of power plants adapted to the conditions of a particular quarry is shown on the example of calculated schedules of energy consumption and reserve of recovery of braking energy. The proposed hardware-methodical complex is a research model for the development of methods for automated data collection and processing in the formation of elements of digital mining production.

scholarly journals Technical Report: Prototipe Rancangan Penentuan Jumlah Kendaraan pada Zona Penyangga TPA Sampah

2018 ◽  
Author(s):  
Andi Susilo ◽  
Syamsul Abbas Ras
Keyword(s):  
Traffic Congestion ◽  
Buffer Zone ◽  
Dump Truck ◽  
Waste Dump ◽  
Queue System ◽  
Waste Landfill ◽  
Technical Report ◽  
Dump Trucks ◽  
Prototype Design

Final waste disposal sites in Indonesia generally use a sanitary landfill system and do not have a buffer zone, so garbage piles up on a landfill. In this study the calculation of the area, the use of buffer zone as the location of queue Dump Truck, the number of dropping locations, and the number of Dump Trucks that can be accommodated in the buffer zone, so that the garbage dump truck does not interfere with traffic around the waste landfill. The simulation results show that for a 15 hectare landfill area with a single queue system can accommodate 150 Dump Trucks in the buffer zone, so that the waste dump can accommodate 500 tons of waste per day. As for the area of 15 hectares of waste landfill with double queue system can accommodate 250 Dump Trucks in the buffer zone, so the waste landfill can accommodate about 1,000 tons of waste per day. Utilization of buffer zone as queue location Dump Truck garbage carrier can solve the problem of traffic congestion and social problem around garbage landfill. Prototype Design Determination of the Number of Vehicles in the TPA Buffer Zone Waste is expected to be used as a decision making in the manufacture of waste processing.

scholarly journals PENGELOLAAN SAMPAH PASAR DI KECAMATAN LOA KULU KABUPATEN KUTAI KARTANEGARA DENGAN MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS (SIG)

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
Zihan Risman ◽  
Yunianto Setiawan ◽  
Ika Meicahayanti
Keyword(s):  
Waste Management ◽  
Organic Waste ◽  
Transportation System ◽  
Dump Truck ◽  
Alternative Route ◽  
Collection System ◽  
Dump Trucks ◽  
Alternative Routes ◽  
Mixed Collection

Pasar Loa Kulu beroperasi setiap hari mulai pukul 06.00  – 17.00 WITA dan dikelola oleh Unit Pengelola Pasar. Pengelolaan sampah di pasar ini belum terkelola dengan baik sehingga perlu adanya pengelolaan. Tujuan dari penelitian ini adalah mengetahui karakteristik sampah dengan merancang dan merekomendasikan pengelolaan sampah pada sistem pemilahan, pewadahan, pengumpulan, dan pengangkutan sampah. Sistem pemilahan dan pewadahan dilakukan dengan menghitung jumlah timbulan dengan hasil rata-rata 540,62 kg/hari dan karakteristik sampah berupa sampah organik sebanyak 492,95 kg/hari dan anorganik 47,66 kg/hari. Direkomendasikan dengan memberikan bak sampah berdasarkan karakteristik agar tidak tercampur. Sistem pengumpulan dilakukan dengan mengumpulkan sampah dari bak sampah hingga ke truk dan ditentukan alternatif rute pengumpulan sampah. Dibuat 3 alternatif rute pada bak sampah belakang dan rute optimum berada pada rute 1. Bak sampah depan dari 2 rute alternatif dipilih rute 2 sebagai rute optimum. Sistem pengangkutan dilakukan penentuan alternatif rute yang efektif dan efisien dengan menggunakan perangkat lunak Arcgis 10.1. Sistem pengangkutan direncanakan dibuat celah pada bak truk sampah antara sampah organik dan anorganik dan dibuat 3 rute alternatif dari Pasar hingga ke TPA Bekotok. Sehingga dipilih rute 1 sebagai rute yang efektif dan efisien.Kata kunci: Pasar, Pemilahan, Pewadahan, Pengangkutan, Pengumpulan. Loa Kulu market operate every day starting at 06.00–17.00 WITA and managed by Unit Market Managers. Waste management in the market has not managed well by  market manager so that required management. The purpose of this research is knowing characteristic garbage to design and recommends waste management on system sorting, containers, collection, and disposal. The system sorting and containers done by counting the number of  pileup with the results average 540,62 kg/day and characteristic of the waste in from organic waste as many as 492, 95 kg/day and inorganic 47,66 kg/day. Recommended by giving a garbage based on characteristic that not mixed. Collection system done with gathering trash from garbage bins to dump truck and determined alternative routes garbage collection. Made 3 alternative routes garbage bins back and route steady be on a route 1. Gabage bins in front of 2 alternative route chosen route 2 as steady route. Transportation system done determination of an effective and efficient by using software Arcgis 10.1. Transportation system planned made a gap in the dump trucks between organic waste and inorganic and made 3 alternative route from market to landfill Bekotok. So chosen route 1 as the route effective and efficient.Keywords: Collection, Containers, Market, Sorting, Transportation.

scholarly journals Correction Procedures for Temperature and Irradiance of Photovoltaic Modules: Determination of Series Resistance and Temperature Coefficients by Means of an Indoor Solar Flash Test Device

2021 ◽  
Vol 65 (2-4) ◽  
pp. 264-270
Author(s):  
Silvia Luciani ◽  
Gianluca Coccia ◽  
Sebastiano Tomassetti ◽  
Mariano Pierantozzi ◽  
Giovanni Di Nicola
Keyword(s):  
Series Resistance ◽  
Experimental Tests ◽  
Standard Test ◽  
Operating Conditions ◽  
Test Device ◽  
Solar Simulator ◽  
Photovoltaic Modules ◽  
Current Voltage ◽  
And Control

The comparison between I-V (current-voltage) curves measured on site and I-V curves declared by the manufacturer allows to detect decrease of performance and control the degradation of photovoltaic modules and strings. On site, I-V curves are usually obtained under operating conditions (OPCs), i.e. at variable solar radiation and module temperature. OPC curves must be translated into standard test conditions (STCs), at a global irradiance of 1000 W/m2 and a module temperature of 25 °C. The correction at STC conditions allows to estimate the deviation between the power of the examined module and the maximum power declared by the manufacturer. A possible translation procedure requires two correction parameters: Rs’, the internal series resistance, and k’, the corresponding temperature coefficient. The aim of this work is to determine the correction parameters carrying out specific experimental tests as indicated by IEC 60891. A set of brand-new photovoltaic modules was experimentally characterized determining their I-V curves by means of an indoor solar flash test device based on a class A+ AM 1.5 solar simulator. Using the OPC I-V curves, obtained at several conditions of irradiance and temperature, it was possible to determine the correction parameters of the photovoltaic modules being considered.

scholarly journals Actual Technical Condition Assessment of A Motor-Wheel Gear of A Dump Truck Belaz Based on the Operating Oil Parameters

2019 ◽  
Vol 105 ◽  
pp. 03021 ◽  
Author(s):  
Andrei Kudrevatykh ◽  
Andrei Ashcheulov ◽  
Alena Ashcheulova ◽  
Olesia Karnadud ◽  
Ludger Rattmann
Keyword(s):  
Chemical Analysis ◽  
Temperature Control ◽  
Technical Condition ◽  
Open Pit ◽  
Dump Truck ◽  
Repair Costs ◽  
Dump Trucks ◽  
Wear Products ◽  
Physical And Chemical ◽  
Mine Dump

One of the most important indicators of mining complexes are reliability and durability of their components. Studies have shown that the largest amount of mine dump truck down time occurs due to unforeseen failures of a motor-wheel gear. The introduction of additional technological processes to diagnose the actual technical condition of a gear in the maintenance procedure will make it possible to maintain directly the state of its component parts with in-place manner. The method of diagnosing the condition of a motor-wheel gear is based on physical and chemical analysis of oil, as well as its temperature control. During open pit machinery exploitation, various mechanical impurities of wear products of rubbing surfaces accumulate in the operating oil, so it is possible to predict the degree of wear of gear units and mechanisms based on these mechanical impurities. The introduction of this method in production will significantly reduce the down time of dump trucks, thereby increase the productivity of the enterprise and reduce repair costs.

Sign in / Sign up

Export Citation Format

Share Document