scholarly journals Timely diagnostics of hydraulic equipment in metallurgical production

2021 ◽  
pp. 50-54
Author(s):  
E. V. Gapeenko
Keyword(s):  
Distinctive Feature ◽  
Continuous Monitoring ◽  
Production Equipment ◽  
Diagnostic Methods ◽  
Hydraulic Systems ◽  
Metallurgical Production ◽  
Management Company ◽  
Hydraulic Equipment ◽  
Fast Acting ◽  
Combined Mode

Precision control of hydraulic equipment is a distinctive feature of modern hydraulic systems. With the help of special diagnostic devices, it is possible to reliably and simply monitor the operation of hydraulic equipment. Diagnostic methods can be very different. The article lists the stages and methods of checking hydraulic equipment malfunctions, as well as describes the principles of operation of diagnostic devices of well‑known world manufacturers HYDAC, MOOG, used in OJSC “BSW – Management Company of the Holding “BMC”. Schematically, the connection of the MOOG tester to the production equipment is presented when checking the servo valve in autonomous and combined mode, without resorting to dismantling the valve. Continuous monitoring of the oil purity with the help of the HYDAC FCU device allowed saving time on assessing its condition and taking fast‑acting corrective measures to clean the oil from contamination.

scholarly journals Modern Modeling of Water Hammer

2017 ◽  
Vol 24 (3) ◽  
pp. 68-77 ◽  
Author(s):  
Kamil Urbanowicz
Keyword(s):  
Side Effects ◽  
Adverse Effects ◽  
Water Hammer ◽  
Hydraulic Systems ◽  
Weighting Functions ◽  
Transient Flows ◽  
Hydraulic Equipment ◽  
Pressure Changes ◽  
The Impact ◽  
Reduced Pressures

Abstract Hydraulic equipment on board ships is common. It assists in the work of: steering gear, pitch propellers, watertight doors, cargo hatch covers, cargo and mooring winches, deck cranes, stern ramps etc. The damage caused by transient flows (which include among others water hammer) are often impossible to repair at sea. Hence, it is very important to estimate the correct pressure runs and associated side effects during their design. The presented study compares the results of research on the impact of a simplified way of modeling the hydraulic resistance and simplified effective weighting functions build of two and three-terms on the estimated results of the pressure changes. As it turns out, simple effective two-terms weighting functions are able to accurately model the analyzed transients. The implementation of the presented method will soon allow current automatic protection of hydraulic systems of the adverse effects associated with frequent elevated and reduced pressures.

scholarly journals Characteristics of hydraulic systems used in vehicles other than machines at work

2018 ◽  
Vol 19 (12) ◽  
pp. 701-705
Author(s):  
Joanna Wilczarska ◽  
Ewa Kuliś ◽  
Maciej Matuszewski
Keyword(s):  
Diagnostic Methods ◽  
Hydraulic Systems ◽  
Testing Methods ◽  
Reliable Operation ◽  
Braking System ◽  
Systematic Control

The efficient and reliable operation of the hydraulic systems and in particular the braking system of vehicles is the basis for their safe use. Hydraulic component wear processes are detrimental to the ability to perform tasks and requirements for these systems. It is therefore essential to carry out systematic control of the operation of all hydraulic systems and in particular of the braking system. Such checks. They are performed by diagnostic methods in service workshops as well as in periodical technical tests of vehicles. Hydraulic and brake testing methods depend on the purpose and design of the system, and the method of commissioning these mechanisms is essential. The scope and methods of diagnosing the actuators used are varied, while the efficiency and uniformity of these systems are assessed in the same way for all types of vehicles.

scholarly journals STATUS AND PROSPECTS OF DEVELOPMENT OF METALLURGICAL PRODUCTION IN BELARUS

2018 ◽  
pp. 10-15
Author(s):  
A. N. Savenok
Keyword(s):  
Large Scale ◽  
Manufacturing Sector ◽  
Regional Scale ◽  
Steel Production ◽  
Scientific Organization ◽  
Economic Activities ◽  
Holding Companies ◽  
Metallurgical Production ◽  
Management Company ◽  
The Republic

A brief analysis of the status and prospects of development of metallurgical complex of the Belarus Republic is given in the article. Statistics of the structure of manufacturing sector by types of economic activities, including metallurgical production, in the Republic of Belarus as a whole and by regions is provided. It was noted that the largest share in the regional scale – 15.6% of metallurgy exists in Gomel region, due to the location of the main flagship of the Belarusian industry – the Belarusian steel works in Zhlobin city of Gomel region. Thanks to the systematic reconstruction and upgrading of existing equipment, introduction of advanced development in the field of metallurgical equipment and technologies OJSC «BSW – management company of holding «BMC» is dynamically developing in the coming years and it is planned to overcome the 3-million milestone in steel production and a threefold boost in productivity. The large-scale project of building a new bar mill with the capacity of 700 thousand tons of rolled products per year was completed in 2015. This production eliminated the strategic imbalance between the capacity of the steelmaking complex and related industries.The most important projects of the holding companies and the perspectives of further development of the holding «BMC» were described. The year of the science -2017began to JSC «BSW» with very significant event: OJSC «BSW – management company of holding «BMC» for the first time was awarded a Certificate of accreditation as a scientific organization.

Research of the Microstructure of the Deposited Layer during Electric Arc Surfacing with Control Impacts

2021 ◽  
Vol 1038 ◽  
pp. 85-92
Author(s):  
Vitaliy Ivanov ◽  
Elena V. Lavrova ◽  
Vladyslav Kibish ◽  
Ihor Mamontov
Keyword(s):  
Complex Shape ◽  
Production Equipment ◽  
Electric Arc ◽  
Operating Conditions ◽  
Metallurgical Production ◽  
Aggressive Environment ◽  
Working Surface ◽  
Slag Inclusions ◽  
Deposited Metal ◽  
The Cost

Electric arc surfacing is widely used for the application of protective and restorative coatings on units and parts of metallurgical production equipment in order to increase their durability in harsh operating conditions and in an aggressive environment. Increasing the efficiency of melting the electrode material is an important task, since it allows one to reduce the required volume of deposited metal and the cost of surfacing. In addition, when surfacing by traditional technology of parts with a complex shape of the working surface, it was found that the deposited layer can contain such defects as single gas and line pores, as well as slag inclusions. The work is devoted to the study of improving the surfacing technology by controlling heat input into the base metal using controlled mechanical actions.

Impedance Shaping for Improved Feel in Hydraulic Systems

2007 ◽  
Author(s):  
M. E. Kontz ◽  
M. C. Herrera ◽  
J. D. Huggins ◽  
W. J. Book
Keyword(s):  
Hydraulic System ◽  
High Pressures ◽  
Haptic Feedback ◽  
Hydraulic Systems ◽  
Actual System ◽  
Human In The Loop ◽  
Hydraulic Equipment ◽  
Machine Interface ◽  
Using Data ◽  
Haptic Control

Applying haptic control to mobile hydraulic equipment presents a practical yet challenging application. One criticism of newer electro-hydraulic system is a lack of “feel.” To a haptics researcher this sounds like a call for haptic feedback in the human-machine interface. However, for an operator the “feel” of the system likely has more to do with how the actual system responds to forces or higher work port pressures. At some point, the high pressures slow down the system or naturally redirect flow to lower pressure circuits in a hydro-mechanical system. How this is done plays a large part in the “feel” of the system. In this paper, a paradigm is presented that tries to merge these two concepts of “feel.” Instead of trying to make the system transparent, the goal is to make the system react to forces acting on the system then use haptic feedback to help alert the operator to these forces. This is done by shaping this impedance so that the system provides a response or “feel” that is closer to a typical excavator. A haptic interface is used to enhance the haptic feel. Performance is evaluated using data from human-in-the-loop testing.

scholarly journals Construction proposal of hydraulic equipment designed to test hydraulic components and energy carriers

2019 ◽  
Vol 302 ◽  
pp. 01020
Author(s):  
Jozef Nosian ◽  
Marietta Markiewicz ◽  
Romana Janoušková ◽  
Patrícia Feriancová
Keyword(s):  
Hydraulic Systems ◽  
Hydraulic Pump ◽  
Laboratory Equipment ◽  
Energy Carriers ◽  
Hydraulic Equipment ◽  
Hydraulic Fluids ◽  
Measurement And Testing ◽  
Test Individual ◽  
Over Time ◽  
Agricultural Machines

The aim of the present article is the construction of a device for measuring and testing hydrostatic converters and subsequent verification measurement of the proposed device. This device will allow the measurement and testing of hydraulic pumps under laboratory conditions. In our case, we will test the hydraulic pump UD–25R, which is used in hydraulic drives of agricultural machines. Last but not least, the device described in the article can be used to test individual energy carriers used in hydraulic systems. The described device can simulate conditions that occur in operation. Using verification measurements we have proved that the designed laboratory equipment is suitable for testing hydraulic components and also allows monitoring and testing of the properties of individual hydraulic fluids. The measurement will result in a change in flow rate over time.

scholarly journals Experimental study of hydraulic equipment operation process

2021 ◽  
Vol 264 ◽  
pp. 02026
Author(s):  
Kamoliddin Rustamov ◽  
Samandar Komilov ◽  
Mavlon Kudaybergenov ◽  
Shamshir Shermatov ◽  
Shahzod Xudoyqulov
Keyword(s):  
Experimental Study ◽  
Experimental Research ◽  
Hydraulic System ◽  
Theoretical Work ◽  
Working Fluid ◽  
Hydraulic Systems ◽  
Equipment Operation ◽  
Operation Process ◽  
Hydraulic Equipment ◽  
The Impact

Relevance. When the hydraulic fluid is operated for several cycles, the impact on hydraulic performance and longevity is greatly increased. So, there are several ways to fix this problem. To increase the efficiency of the hydraulic system, it is necessary to study the working processes, the hydraulic systems of the quick-change equipment of the machine with a lawn of the kshp are made as a whole, and the equipment of the machine is attached to the suspension device. The complexity of these processes lies in the fact that they allow experimental research and verification of results using mathematical models. Aim. The purpose of the experimental study in this dissertation is to study the effect of forces acting on the hydraulic system when excavating the hydraulic system of a multipurpose machine and substantiate the parameters by assessing power use efficiency. Methods. Checking the suitability of the working fluid during earthworks, as well as the mathematical model. In this case, we studied the hydraulic system of a single-bucket excavator, the device of quick-change equipment for a universal machine. Results. The theoretical work performed has been verified and the confirmation of the operation of a multipurpose machine designed with earth and dozer equipment. The installation of equipment based on TTZ-80 made it possible to carry out experimental research with the most energy-intensive workflow, determining energy efficiency indicators for excavation and leveling. Conclusion. Comprehensive tests made it possible to conclude that the characteristics of the developed design and the characteristics of the engine of the base machine - the TTZ-80.10 - KM-1 tractor, overcome the resistance encountered during technological operations of a multipurpose machine.

scholarly journals Energy Management of Low-Pressure Systems Utilizing Pump-Unloading Valve and Accumulator

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4423 ◽  
Author(s):  
Patrick Stump ◽  
Nathan Keller ◽  
Andrea Vacca
Keyword(s):  
Power Loss ◽  
Low Pressure ◽  
Hydraulic Control ◽  
Hydraulic Systems ◽  
Minimal Impact ◽  
Cooling Flow ◽  
Duty Cycles ◽  
Hydraulic Equipment ◽  
Variable Displacement ◽  
Continuous Power

In the context of improving energy efficiency and fuel consumption of mobile hydraulic equipment, it is important to analyze all the sources of power loss occurring within the hydraulic systems. While plenty of analyses have been performed on the working implements and the main transmission systems, very little attention has been paid to low-pressure (LP) systems until recently. LP systems are required on closed-circuit hydraulic systems to replenish losses, provide cooling flow, and maintain a pilot pressure necessary to operate hydraulic control valves and variable displacement units. It is shown that these circuits, which are often thought to have minimal impact on power consumption, actually cause significant, continuous power loss. A new method of power savings in these circuits is investigated through management of charge pump flow by application of an accumulator-sense pump-unloading (ASPU) valve. This work further proposes the combination of a split LP architecture with an ASPU valve. Three systems are simulated using Simcenter Amesim® and MATLAB/Simulink®. Using realistic duty cycles and unit loss models on a circuit for mobile off-road hydraulic equipment, it is shown that a standard LP system can consume about 5 kW of power. Power savings of up to 65% over a standard LP system are demonstrated by the proposed architecture.

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