scholarly journals Study on oil pilot circuit of adaptive hydraulic drive of tool advance in mobile drilling machine

2019 ◽  
Vol 19 (1) ◽  
pp. 13-23
Author(s):  
V. S. Sidorenko ◽  
V. I. Grishchenko ◽  
S. V. Rakulenko ◽  
M. S. Poleshkin ◽  
D. D. Dymochkin
Keyword(s):  
Hydraulic Drive ◽  
Control Circuit ◽  
Performance Criteria ◽  
Drilling Machine ◽  
Hydraulic Control ◽  
Hydraulic Systems ◽  
Hydraulic Motor ◽  
Original Design ◽  
Work Cycle ◽  
Hydromechanical System

Introduction. An adaptive hydraulic drive of the tool advance in a mobile drilling machine is studied on the example of the URB-2.5 installation. A typical technological cycle of the mobile drilling machine is considered; the performance criteria are defined. An original design of the adaptive hydraulic drive is proposed on the basis of the analysis. Adaptation of the hydraulic drive of the tool advance is carried out using an adjustable volumetric hydraulic motor with a hydraulic control circuit under discontinuous loads on the tool during the drilling process.Materials and Methods. Through a preliminary computational experiment in the Matlab Simulink program, the following parameters of the control loop devices were determined: a hydromechanical sensor and a hydraulically controlled valve, on the basis of which the experimental setup was implemented. The performed multifactor experiment allowed identifying the processes in the original hydraulic control circuit of the hydraulic motor under various modes of tool loading.Research Results. The kinematic and power characteristics of the hydromechanical system of a mobile drilling rig, the hydraulic control effect on the settings of the hydraulic control circuit devices were obtained and determined. The results enabled to specify the rational ranges of the hydromechanical system operation for a typical work cycle.Discussion and Conclusions. The results obtained can be used to create hydraulic systems of new drilling machines with various characteristics. The application of the developed techniques of research and processing of their results will reduce the time and costs involved in designing adaptive hydraulic systems for mobile technological machines, creating prototypes and conducting commissioning procedures.

Application of ultra-high molecular weight polyethylene in a hydraulic drive

2020 ◽  
pp. 77-78
Keyword(s):  
Molecular Weight ◽  
Low Temperature ◽  
High Molecular Weight ◽  
Hydraulic Drive ◽  
Control Valve ◽  
Hydraulic Control ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Hydraulic Oil ◽  
Ultra High Molecular Weight

The use of ultra-high molecular weight polyethylene (UHMW PE) for the manufacture of various parts, in particular cuffs for hydraulic drives, is proposed. The properties and advantages of UHMW PE in comparison with other polyethylene materials are considered. Keywords ultra-high molecular weight polyethylene, hydraulic pump, hydraulic motor, hydraulic control valve, hydraulic oil, low temperature. [email protected]

scholarly journals UNIVERSAL HYDRAULIC DRIVE FOR AGRICULTURAL TECHNOLOGY

2021 ◽  
Vol 295 (2) ◽  
pp. 127-129
Author(s):  
V. YANISHEVSKYY ◽  
Keyword(s):  
Hydraulic Drive ◽  
Economic Models ◽  
Hydraulic Systems ◽  
Hydraulic Motor ◽  
Important Indicator ◽  
Air Conditioners ◽  
Smooth Change ◽  
Wide Range ◽  
The World ◽  
Foreign Agricultural

The introduction and functional expansion of hydraulic drives expands the use of hydraulic systems as a power take-off, providing the possibility of independent drive of different consumers in a wide range of loads. The flagships of foreign agricultural, road, industrial engineering equip their products with hydraulic systems, the power of which significantly exceeds 70 kW and this figure continues to grow. Due to the fact that the developers of mobile energy are in a rigid framework for size, fuel and other indicators, the creation of such equipment is through the introduction of universal hydraulic systems. Universalization of hydraulic systems to ensure the work of external consumers is one of the most important tasks in the development of hydraulic systems. But, despite more than age development and improvement of the hydraulic drive, scientific researches for the purpose of creation of universal and more economic models are actively conducted in different countries of the world. The big disadvantage of these designs is the inability to change the speed of the shaft of the hydraulic motor drive equipment, because this parameter depends on the wear of components and parts of the hydraulic drive, oil temperature. An important indicator of modern hydraulic drives is the introduction of adjustable pumps, which significantly expand the potential of the hydraulic drive by improving the technical and economic performance. In this case, the drive of all equipment is provided by one pump. Such “centralized” systems operate from a single energy source and air conditioners. As a result the possibility of return rotation of the hydraulic motor, its braking, smooth change of frequency of rotation of a drive of the equipment of agricultural machines is provided. But, despite more than age development and improvement of the hydraulic drive, researches for the purpose of creation of universal and more economic models are actively conducted in different countries of the world.

Position Control of Direct Driven Hydraulic Drive

2014 ◽  
Author(s):  
Carlo Bonato ◽  
Tatiana A. Minav ◽  
Panu Sainio ◽  
Matti Pietola
Keyword(s):  
Position Control ◽  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Angular Speed ◽  
Hydraulic Systems ◽  
Direct Drive ◽  
Hydraulic Motor ◽  
Oil Flow ◽  
Excellent Control ◽  
Mobile Machinery

This paper investigates directly driven hydraulic setup for non-road mobile machinery (NRMM) application. The purpose of this research is to utilize the excellent control capabilities of modern electric drives in electro-hydraulic systems, create direct drive position control for the hydraulic cylinder and verify the results by measurements. The control is implemented directly with a motor drive without conventional control valves. Speed and position of the double-acting cylinder is determined by in-coming oil flow from the pump, out-coming flow of hydraulic motor and angular speed of the electric motor with a single feedback from motor rotor encoder. Empirical results proved that the control suits NRMM application. The achieved maximum final position error of 3.1 % of the position control for tested cycle is fulfilling required accuracy.

scholarly journals Control efficiency improvement of an electro-hydraulic winch

2021 ◽  
Vol 3 (9) ◽  
pp. 36-43
Author(s):  
I.C. Duțu ◽  
C. Frățilă ◽  
T. Axinte ◽  
M.G. Munteanu ◽  
L. Calancea ◽  
...  
Keyword(s):  
Control Systems ◽  
Hydraulic Drive ◽  
Simulation Software ◽  
Research Vessel ◽  
Efficiency Improvement ◽  
Hydraulic Control ◽  
Hydraulic Systems ◽  
Structural Part ◽  
Pressure Losses ◽  
Incompressible Euler

The paper presents a study regarding electro-hydraulic control systems for drive winches, a structural part of LARS (Launch and Recovery Systems). In the Introduction section of the paper, the authors present the domains of the research vessel. Furthermore, there is presented the importance of launch and recovery systems (LARS) and drive winches on the deck of a research vessel. The launch and recovery systems (LARS) using drive winches are installed on the stern of the research vessel. Further in the paper, the authors present the results of studying three simplified systems that use electric, hydraulic and electro-hydraulic driving solutions. Furthermore, there are presented comparative advantages of using this three types of drive winches. At the end of the paper, the authors perform an analysis of the electro-hydraulic systems for the drive winch, using a modelling and simulation software. Each schematic is presented along with its components. Moreover, the authors mention that all the schematics presented in this paper are modelled using FluidSim software from FESTO. In this case, only three mathematic relations are used in the paper: the Cauchy momentum (convective form), the incompressible Euler relations and the pressure losses in the hydraulic and electro-hydraulic drive winch.

Stabilization of the Speed of the Hydraulic Motor Through Throttle Compensation for Volume Losses

2020 ◽  
Vol 26 (3) ◽  
pp. 126-130
Author(s):  
Krasimir Kalev
Keyword(s):  
Flow Rate ◽  
Hydraulic Drive ◽  
Pressure Change ◽  
Operating Conditions ◽  
Drive System ◽  
Inlet Pressure ◽  
Schematic Diagram ◽  
Hydraulic Characteristics ◽  
Hydraulic Motor ◽  
Flow Through

AbstractA schematic diagram of a hydraulic drive system is provided to stabilize the speed of the working body by compensating for volumetric losses in the hydraulic motor. The diagram shows the inclusion of an originally developed self-adjusting choke whose flow rate in the inlet pressure change range tends to reverse - with increasing pressure the flow through it decreases. Dependent on the hydraulic characteristics of the hydraulic motor and the specific operating conditions.

scholarly journals Psychoacoustic Evaluation of Hydraulic Pumps

2021 ◽  
Vol 13 (13) ◽  
pp. 7320
Author(s):  
Tobias Pietrzyk ◽  
Markus Georgi ◽  
Sabine Schlittmeier ◽  
Katharina Schmitz
Keyword(s):  
Sound Pressure ◽  
Paired Comparison ◽  
Hydraulic Drive ◽  
Operating Parameter ◽  
Gear Pump ◽  
Hydraulic Systems ◽  
Hydraulic Pump ◽  
Listening Tests ◽  
Internal Gear ◽  
Axial Piston

In this study, sound measurements of an axial piston pump and an internal gear pump were performed and subjective pleasantness judgements were collected in listening tests (to analyze the subjective pleasantness), which could be seen as the inverse of the subjective annoyance of hydraulic drives. Pumps are the dominant sound source in hydraulic systems. The noise generation of displacement machines is subject of current research. However, in this research only the sound pressure level (SPL) was considered. Psychoacoustic metrics give new possibilities to analyze the sound of hydraulic drive technology and to improve the sound quality. For this purpose, instrumental measurements of the acoustic and psychoacoustic parameters are evaluated for both pump types. The recorded sounds are played back to the participants in listening tests. Participants evaluate them regarding the subjective pleasantness by means of paired comparison, which is an indirect scaling method. The dependence of the subjective pleasantness on speed and pressure was analyzed for both pump types. Different regression analyses were carried out to predict the subjectively perceived pleasantness or annoyance of the pumps. Results show that a lower speed is the decisive operating parameter for reducing both the SPL and the annoyance of a hydraulic pump.

Calculation of a closed hydraulic volumetric system

2021 ◽  
pp. 27-30
Author(s):  
Keyword(s):  
Power Plant ◽  
Wind Power ◽  
Hydraulic System ◽  
Working Fluid ◽  
Wind Power Plant ◽  
Hydraulic Systems ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Oil Pump ◽  
Selection Of

An algorithm is proposed for calculating a closed volumetric hydraulic pump-hydraulic motor system using the example of the hydraulic system of a wind power plant, based on the calculation of the hydraulic systems of mobile machines. The main characteristics of the system components, the selection of initial data for the calculation, working fluid and diameters of hydraulic lines are analyzed. Keywords: hydraulic system, energy, fluid, oil, pump, motor, renewable energy source, wind power plant, machine. [email protected]

scholarly journals Fundamental Research on Hydraulic Systems Driven by Alternating Flow

10.14311/1606 ◽  
2012 ◽  
Vol 52 (4) ◽  
Author(s):  
Ioan-Lucian Marcu ◽  
Daniel-Vasile Banyai
Keyword(s):  
Volume Of Fluid ◽  
Hydraulic Systems ◽  
Hydraulic Motor ◽  
New Approach ◽  
Three Phase ◽  
Fundamental Research ◽  
Design And Testing

This paper presents a new approach to rotary hydraulic systems, and the functional principles of rotary hydraulic systems that can work using alternating flows. Hydraulic transmissions using alternating flows are based on bidirectional displacement of a predefined volume of fluid through the connection pipes between the alternating flow, the pressure energy generator and the motor. The paper also presents some considerations regarding the basic calculation formulas, the design and testing principles for a hydraulic motor driven by alternating flow, and also a three-phase rotary hydraulic motor.

scholarly journals RESEARCH OF DYNAMIC MODES OF VOLUMETRIC HYDRAULIC DRIVE WITH DIESEL ENGINE MOBILE DRILLING MACHINE

2017 ◽  
Vol 1 (№12 2017) ◽  
pp. 85-90
Author(s):  
A.I. Ozerskiy ◽  
V.S. Sidorenko ◽  
S.V. Rakulenko ◽  
M.S. Poleshkin
Keyword(s):  
Diesel Engine ◽  
Hydraulic Drive ◽  
Drilling Machine

scholarly journals Theoretical background of hydraulic drive control system analysis for testing piston hydraulic cylinders

2019 ◽  
Vol 19 (3) ◽  
pp. 242-249 ◽  
Author(s):  
A. T. Rybak ◽  
I. K. Tsybriy ◽  
S. V. Nosachev ◽  
A. R. Zenin
Keyword(s):  
Mathematical Modeling ◽  
Hydraulic System ◽  
Energy Recovery ◽  
Test Bench ◽  
Hydraulic Drive ◽  
Mechanical Transmission ◽  
Hydraulic Motor ◽  
Hydraulic Machines ◽  
Life Tests ◽  
Hydraulic Cylinders

Introduction. The durability and performance of hydraulic machines is determined through life tests. At that, various braking devices (mechanical, electric, hydraulic, etc.) are used for strength loading of the hydraulic motor, as a result of which a significant amount of energy is lost. This can be avoided if the method of rotational motion with energy recovery is used during life tests. This approach is applicable for hydraulic pumps, motors, and hydraulic cylinders.Materials and Methods. A test bench is presented, the design of which provides recreation of the conditions most appropriate for the field operation of hydraulic cylinders. In this case, energy recovery is possible. To solve the research problems, methods of mathematical modeling were used, the basic functional parameters of the proposed design were calculated. The determination of the pressure increment at various points in the hydraulic system is based on the theory of volumetric rigidity. When modeling the motion of the moving elements of the bench hydraulic system, the laws of rotor motion are used.Research Results. In the structure of the test bench, the cylinders in question are located in the pressure main between the hydraulic pump and the hydraulic motor. This enables to significantly reduce the bench itself and to save a significant amount of energy due to its recovery. A basic hydraulic diagram of the test bench for piston hydraulic cylinders is presented, in which the operation of the moving elements of the system is shown. A mathematical modeling of the hydraulic system of the bench is performed. A kinematic diagram of the mechanism for transmitting motion between test cylinders is shown.Discussion and Conclusions. The system of equations presented in the paper shows how the increment of pressure at the selected nodal points of the energy recovery system is determined (in particular, how the increment depends on time, reduced coefficient of volumetric rigidity, operating fluid consumption, and piston areas). The velocities of the hydraulic pistons are determined according to the kinematic scheme of the mechanical transmission of the bench. Thus it can be argued that, thanks to the solution presented in the paper, the life test results of hydraulic cylinders will adequately reflect their operation under rated duties.

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