scholarly journals ENERGY-EFFICIENT TECHNICAL SOLUTIONS FOR THE OPERATIONAL CHARACTERISTICS OF THE HYDRAULIC DRIVE OF THE TRACTOR

2021 ◽  
Author(s):  
R.V. Yudin ◽  
◽  
R.N. Puzakov ◽  
Keyword(s):  
Energy Saving ◽  
Energy Efficient ◽  
Hydraulic System ◽  
Hydraulic Drive ◽  
Working Fluid ◽  
Uneven Terrain ◽  
Operational Characteristics ◽  
High Dynamic ◽  
Hydraulic Accumulator ◽  
Technical Solutions

During the movement of the tractor on the uneven terrain, there are fluctuations that cause jumps of the working fluid in the hydraulic system and high dynamic loads. The solution to this problem is the use of an energy-saving hydraulic drive with a hydraulic accumulator and a system of aggregates this leads to increased efficiency and increased productivity of skidding grippers. A mathematical model of working processes with an energy-saving hydraulic drive is compiled.

scholarly journals RESULTS OF EXPERIMENTAL RESEARCHES OF WORKING PROCESSES OF BLOCKLESS LOGGING CAPTURE WITH ENERGY-SAVING HYDRAULIC DRIVE

2020 ◽  
Vol 8 (1) ◽  
pp. 123-128
Author(s):  
P. Popikov ◽  
Denis Kanishchev ◽  
A. Sutolkin
Keyword(s):  
Energy Saving ◽  
Hydraulic System ◽  
Hydraulic Drive ◽  
Metal Structure ◽  
Working Fluid ◽  
Operating Modes ◽  
Recovery System ◽  
Hydraulic Cylinders ◽  
Hydraulic Accumulator ◽  
Experimental Researches

During the movement of the tractor in the unit with the lockless grabs on the roughness of the terrain on the cuttings there are fluctuations that cause jumps of the working fluid in the hydraulic system. This leads to loss of fluid through the gaps and seals of the moving elements of the pump and hydraulic cylinders. For laboratory studies of these phenomena, a laboratory installation was made with the introduction of a pneumatic-hydraulic accumulator of the A5579-0 series into the hydraulic circuit. Laboratory tests were carried out, which showed that the pneumohydraulic battery allows, due to the energy accumulated during operation, to reduce the pressure spikes of the working fluid in the hydraulic system. This reduces the dynamic load on the metal structure of the grip, the hydraulic pump drive and the tractor transmission, as well as increases the volumetric efficiency. After processing waveforms of operating modes to capture with energy saving hydraulic drive using the program STATISTICA was established replications of individual load magnitudes and histograms of pressure without the use of a hydropneumatic accumulator and to its use. It was found that the energy recovery system reduces the pressure spikes of the working fluid during transients by 1.4-1.7 times and allows you to store power within 1.7 ... 2.1 kW.

scholarly journals Justification of the Kinematic Diagrams for the Distribution System of a Planetary Hydraulic Motor

2018 ◽  
Vol 7 (4.3) ◽  
pp. 6 ◽  
Author(s):  
Angela Voloshina ◽  
Anatolii Panchenko ◽  
Oleg Boltynskiy ◽  
Igor Panchenko ◽  
Olena Titova
Keyword(s):  
Distribution System ◽  
Hydraulic System ◽  
Hydraulic Drive ◽  
Fluid Distribution ◽  
Working Fluid ◽  
Hydraulic Motor ◽  
Hydraulic Motors ◽  
Output Characteristics ◽  
Kinematic Diagram ◽  
The Impact

The output characteristics of a planetary (orbital) hydraulic motor could be significantly improved if the kinematic diagrams for its working fluid distribution system are chosen correctly and substantiated. Fluctuations in the flow of the power fluid cause pulsation in the cavity of the input pressure of the hydraulic motor. This results to vibration of the hydraulic system elements. Thus, the hydraulic motor can be considered as a source of pulsation which leads to functional failures of the hydraulic system. As they run at low rotational speeds with high torque, planetary hydraulic motors are commonly applied for a hydraulic drive in active working tools of self-propelled machinery. It has been established that one of the main components of a planetary hydraulic motor, which causes pressure pulsations, is its distribution system. The frequency and amplitude of these pulsations depends on the kinematic diagram for the distribution system of the power fluid. Therefore, we studied how the kinematic diagram for the distribution system effects on the output characteristics of a planetary motor. Since the change in the capacity of a distribution system with various kinematic diagrams influences on the output characteristics of a planetary motor, the impact was investigated. The kinematic diagrams, which improve the output characteristics of planetary hydraulic motors, were justified. 

scholarly journals Establishment of rational parameters of temperature of working liquid in the hydraulic drive of the excavator of the fourth dimensional group at different equipment

2021 ◽  
pp. 98
Author(s):  
Igor Pimonov ◽  
Igor Pohorilyi ◽  
Maksim Fedyuchkov
Keyword(s):  
Hydraulic System ◽  
Hydraulic Drive ◽  
Internal Flow ◽  
Technical Condition ◽  
Working Fluid ◽  
Fluid Temperature ◽  
Hydraulic Motor ◽  
Dimensional Group ◽  
Increasing Temperature ◽  
Working Liquid

The article considers the hydraulic drive of a modern excavator on which the influence of the working fluid temperature on the power is established, depending on the technical condition of the hydraulic elements. Studies have shown that new pumps and which have operating wear, have different rational temperature of the working fluid. It is impossible to imagine modern construction machines without equipping them with a hydraulic drive. The operation of the hydraulic drive largely determines the efficiency of operation of both a single machine and the entire fleet, which consists of new and old machines . The efficiency of hydrated machines is ensured in their design, manufacture, and operation, where an important role is played by the parameters of the working fluid: the degree of its contamination and temperature (viscosity). The influence of the temperature of the working fluid on the efficiency of the hydraulic drive and the ability to control the efficiency of the hydraulic drive with the help of temperature have not been studied enough. One of the promising areas in determining the rational temperature of the working fluid is the development of new designs of heat exchangers, heaters, diagnostic devices, which will be able to assess the technical condition of individual elements and the hydraulic drive as a whole. Establishing a rational temperature of the working fluid as a necessary parameter of the hydraulic system is mandatory when using modern methods to increase the efficiency of operation, maintenance and repair of hydraulic drives. With increasing temperature of the working fluid, its viscosity decreases and the loss of pressure and power in the mains of the hydraulic drive. However, this increases the internal flow of hydraulic units, which leads to an increase in power loss. Studies have shown that new pumps and which have operational wear, have different rational temperature of the working fluid. At rational values of temperature to the hydraulic motor the worn out pumps can give almost twice more power, than at 50 ° C, recommended for new pumps. The driving power of the pump, thus, practically does not change.

scholarly journals INFLUENCE OF OPERATING MODES OF FOREST FIRE SOIL-THROWING MACHINE WITH HYDRAULIC DRIVE ON EFFICIENCY INDICATORS

2020 ◽  
Vol 10 (1) ◽  
pp. 209-217 ◽  
Author(s):  
P. Popikov ◽  
Petr Popikov ◽  
Andrey Sharov ◽  
Aleksandr Petkov ◽  
Anton Pozdnyakov
Keyword(s):  
Energy Saving ◽  
Forest Fire ◽  
Visual Analysis ◽  
Soil Layer ◽  
Hydraulic Drive ◽  
Fire Fighting ◽  
Working Fluid ◽  
Hydraulic Motor ◽  
Operating Modes ◽  
Efficiency Indicators

Many areas of human activity, in particular, agriculture and the timber industry, use technological machines and equipment having in their arsenal a hydraulic system for supplying pressure to the used units for soil cultivation, sowing, cutting, rooting out and many others. The article discusses the use of an energy-saving hydraulic drive. It provides experimental data on its use in a forest fire soil-throwing machine. The experiment was carried out using the LHT-55 forestry tractor, on the rear hitch of which a laboratory sample of a fire-fighting soil-throwing machine with a rotor-thrower drive from a hydraulic motor has been mounted. An adjustable hydraulic pump is installed on the rear frame of LHT-55 tractor, on which there is a regulator of the volume of supplied fluid. In the course of experimental studies we used the methods, specified in State Standard 20915–2011, Industrial Standard 70.2.16–73. During the experiments, the main indicators of the efficiency of forest fire-fighting soil-throwing machine have been determined: the maximum surge in the pressure of the working fluid in the hydraulic drive for the duty cycle Pm; the energy stored by the pneumohydraulic accumulator in one working cycle Pm (operation of the safety valve); the maximum energy that a pneumohydraulic accumulator with these parameters is able to accumulate per line kilometer or per shift Eav;, average range of the soil throwing Lav and the thickness of the soil layer depending on the distance of throw T. A large number of selected determining factors made it possible to depict graphically obtained data and conduct a visual analysis to obtain the most effective operating modes of a forest fire soil-throwing machine with an energy-saving hydraulic drive. The paper presents the rationale for the new design of a forest fire soil-throwing machine with an energy-saving hydraulic drive. The dependences of the efficiency indicators of working flows on the design and technological parameters of a forest fire soil-throwing machine have been obtained.

scholarly journals INCREASING THE TECHNICAL LEVEL OF HYDRAULIC MANIPULATORS OF AUTOCOLLIMATIONAL

2020 ◽  
Vol 8 (1) ◽  
pp. 129-134
Author(s):  
P. Popikov ◽  
Irina Chetverikova ◽  
Aleksandr Chernykh
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Hydraulic Drive ◽  
High Energy ◽  
Technical Level ◽  
Maximum Pressure ◽  
Internal Diameter ◽  
Hydraulic Manipulators ◽  
Hydraulic Equipment ◽  
Hydraulic Accumulator

The main requirements for hydraulic equipment of forest transport machines of manipulator type are revealed. It is established that the main drawback of the used hydraulic drives of manipulators is their increased power and high energy consumption. The main ways of increasing the technical level of hydraulic manipulators of forest transport vehicles are considered. The constructive optimization and improvement of the hydraulic drive mechanism for lifting the boom and turning the column of the manipulator is justified. New designs with the use of hydro-mechanical dampers and energy-saving devices are proposed. As energy-saving devices, it is proposed to use a hydraulic accumulator. The main advantages of the design, which are to increase the reliability and expand the technological capabilities of hydraulic manipulators forest transport machines. The principles of influence on the hydraulic system that reduce the pressure in the piston group and reduce energy consumption are substantiated. The proposed energy-saving hydraulic drive reduces the maximum pressure during braking to 3 MPa. The recovery energy when the column is rotated is 25 % of the energy consumed. The diameter of the dampener's lockable cavities should be 48 mm with the internal diameter of the dampener 65 mm. Minimal changes in the design are achieved to increase the technical level of the hydraulic drive of manipulators of forest transport machines and its competitiveness among existing analogues.

scholarly journals An Energy Efficient Two-Stage Supply Pressure Hydraulic System for the Downhole Traction Robot

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Delei Fang ◽  
Jianzhong Shang ◽  
Junhong Yang ◽  
Zhuo Wang ◽  
Yong Xue ◽  
...  
Keyword(s):  
Energy Loss ◽  
Mobile Robot ◽  
Energy Efficient ◽  
Hydraulic System ◽  
Hydraulic Drive ◽  
The Novel ◽  
Pressure Source ◽  
Two Stage ◽  
Pressure System ◽  
Supply Pressure

The efficiency of hydraulic drive system has become one of the significant issues in mobile robot. In this paper, an energy efficient two-stage supply pressure hydraulic system is proposed to solve the energy waste in the one-stage supply pressure system of the downhole traction robot. This novel two-stage hydraulic system can match different pressure requirements of actuator by changing the modes of supply pressure, which is helpful to reduce the energy loss and improve the efficiency for traction robot. Based on the robot working principle, the load characteristics in different actuators are obtained and the shortage in traditional hydraulic system is analyzed. The novel hydraulic system which consists of a high-pressure source and a low-pressure source is designed, including the system structure and energy supply method. According to the energy flow process, energy loss models of the system and components are established to analyze energy-saving principle of the novel hydraulic system. The feasibility and efficiency of two-stage supply pressure system are verified by simulating the operating process of telescopic mechanism. Finally, the simulation shows that control precision of the novel system can reach 3.5 mm and the efficiency is increased to 59.53%, which can provide theoretical reference for design of hydraulic drive system in traction robot and the efficiency improvement of multiactuator mobile robot.

scholarly journals Modelling workflow forest fire soil - thrower with energy-saving hydraulic drive

2018 ◽  
Vol 7 (4) ◽  
pp. 182-189
Author(s):  
Петр Попиков ◽  
P. Popikov ◽  
П. Гончаров ◽  
P. Goncharov ◽  
Андрей Шаров ◽  
...  
Keyword(s):  
Energy Saving ◽  
Forest Fire ◽  
Hydraulic System ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Hydraulic Drive ◽  
Spherical Shape ◽  
Algebraic Equations ◽  
Working Bodies ◽  
Three Dimensional Space

The article is a schematic diagram of the hydraulic soil-thrower with connection air-charged accumulator which stores energy during overload when working bodies meeting with obstacles, while avoiding the operation of safety valves and conversion hydraulic energy into heat. Mathematical model that comprehensively describes the events taking place: the rotation and movement of the rotor soil-thrower rotor interaction with the ground and obstacles, the drive ground in space. In the method of the soil and the obstacles presented a collection of a large number (about 2000 ... 10000) spherical elements of small size, enabled communicate both among themselves and with the blades soil-thrower. The simulation is performed in three-dimensional space XYZ, where in the same elements have a spherical shape with the same diameter. With in the framework of the model developed by the working surfaces are represented as a set of elementary triangles. Rotor soil-thrower model with some degree of desensitization is represented by four rectangular blades, each of which consists of two triangles. In the process of simulation reproduced rotation of the rotor and the calculation of the interaction with the elements of triangular surfaces ground and obstacles. To solve the system of differential-social and algebraic equations, which laid the basis for the model, time-operated computer program "Program for modeling the work of forest fire soil-thrower with energy saving action hydraulic drive" program time to work in Borland Delphi environment 7.0 language Object Programming PascalIzucheny soil-thrower stage of interaction with the irresistible preption. Using the powering hydraulic system improves the uniformity of rotation of the rotor, to reduce energy costs for rotorus rotation by 12%.

Direct-Driven Hydraulic Drive Without Conventional Oil Tank

2014 ◽  
Author(s):  
Tatiana A. Minav ◽  
Panu Sainio ◽  
Matti Pietola
Keyword(s):  
Hydraulic System ◽  
Position Control ◽  
Hydraulic Drive ◽  
Simulation Models ◽  
Loop System ◽  
Flexible Control ◽  
Excellent Control ◽  
Oil Tank ◽  
Hydraulic Accumulator ◽  
Conventional Oil

In the past few years, direct-driven hydraulic drive (DDH) has synthesized the advantages of compact high power of the hydraulic system and flexible control of the electric motor. This paper investigates the direct-driven hydraulic setup for the non-road mobile machinery (NRMM) application. In the proposed setup, the speed and position control of a double-acting cylinder is implemented directly with a Synchronous Torque Motor drive in a close-loop system without conventional control valves and oil tank. In relation to this, hydraulic accumulator is employed as a replacement of the conventional oil tank. For position and speed control of this closed-loop system, only single feedback is applied from motor’s rotor encoder. As a result, excellent control capabilities of a modern electric drive brings along safety functions and monitoring capabilities of the motor and controller to benefit the hydraulic system. Functionalities of motor controllers offer opportunities to duplicate conventional sensors based on either safety or reliability demands. The system is investigated by means of measurements and also simulation models.

Simulation Study on Different Energy Efficient Hydraulic System: An Overview

2014 ◽  
Vol 592-594 ◽  
pp. 2234-2238
Author(s):  
Ramashankar Paswan ◽  
J. Das ◽  
N. Kumar ◽  
Ajit Kumar ◽  
Santosh K. Mishra ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Hydraulic System ◽  
Energy Recovery ◽  
Storage System ◽  
Energy Storage System ◽  
Hydraulic Motor ◽  
Hydrostatic Transmission ◽  
Recovery Potential ◽  
Hydraulic Accumulator ◽  
Physical Features

In this paper, a new hydraulic energy-regenerative model was offered from its application through modelling to its control. The model was constructed on a closed-loop hydrostatic transmission and used a hydraulic accumulator as the energy storage system invented in a new configuration to recover the kinetic energy without any return of the fluid flow. The displacement deviation in the secondary unit was reduced, increasing the uses of several types of hydraulic motor/pumps. The proposed system was modelled based on its physical features. The energy consumption and the influences on the energy-recovery potential of the system were analyzed. Simulation and experiments were performed to evaluate the validity of the employed mathematical model and the effectiveness of the control system. Keywords: Hydraulic accumulator, Hydraulic system, Energy recovery.

Energy-saving strategies on power hydraulic system: An overview

2020 ◽  
pp. 095965182093162
Author(s):  
Anil C Mahato ◽  
Sanjoy K Ghoshal
Keyword(s):  
Energy Efficiency ◽  
Power System ◽  
Energy Saving ◽  
Energy Efficient ◽  
Hydraulic System ◽  
Fluid Power ◽  
Clear Understanding ◽  
Loss Reduction ◽  
Tabular Form ◽  
Fluid Power System

Different strategies for improving the energy efficiency of a power hydraulic system have been reviewed in this article. The energy-saving scheme is classified into three categories: S ystem design, Improving components or product functions and Loss reduction. The sub-categories of energy-saving strategies are discussed briefly. Also, different energy-saving potentials of power hydraulic system are presented in tabular form for clear understanding on the chronological development toward energy-efficient fluid power system.

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