scholarly journals Bionic substantiation of parameters of asymmetric plane-cutting working bodies of machines for surface tillage

2020 ◽  
Author(s):  
I.V. Sobolevsky ◽  
Keyword(s):  
Horizontal Plane ◽  
Cutting Tool ◽  
Cutting Edge ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Treated Soil ◽  
Depth Processing ◽  
Theoretical Assumptions ◽  
Left And Right ◽  
Working Bodies

The article reveals a biosystems approach to substantiating the theoretical assumptions of the design parameters of asymmetric plane-cutting working bodies of machines for surface tillage, with the widths of the left and right plane-cutting knives, creating conditions for stable running in the horizontal plane, taking into account the properties of the treated soil, the shape of the cutting edge of the knives and their depth processing. As a result of theoretical studies, the shape of the asymmetric planar cutting tool for surface tillage to a depth of 16 cm, the rational ratio of the working width of the left and right plane cutting knives, ensuring stability along the depth and in the horizontal plane, with the best agrotechnical indicators, is within 2.1– 2.7.

scholarly journals Substantiation of the parameters of the working bodies of undulating disks of soil-cultivating harrows with a bionic approach

2021 ◽  
Vol 845 (1) ◽  
pp. 012140
Author(s):  
I V Sobolevsky ◽  
V S Pashtetskiy ◽  
I I Kalafatov
Keyword(s):  
Erosion Resistance ◽  
Dung Beetle ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Cerastoderma Edule ◽  
Agricultural Mechanics ◽  
Bivalve Shell ◽  
Working Bodies

Abstract The article presents the methods and results of the bionic approach in the system of agricultural mechanics, which made it possible to theoretically substantiate the main parameters of the model of the working organs of wavy discs using two bionic prototypes - the burrowing leg and radial ribs of the bivalve shell of the edible heart-shaped mollusk (Cerastoderma edule) and the burrowing leg of the dung beetle common (Geotrupes stercorarius). The model of the working bodies of undulating disks allows one to preserve the anti-erosion resistance of the soil in the upper cultivated layer in order to preserve its structure and stubble background during non-moldboard tillage in the soil-protective agriculture system for the technologies “Verti-till” and “Strip-till”. The results of theoretical studies on the substantiation of the design parameters of the working bodies of wavy discs for surface tillage are presented.

scholarly journals Kinematics of the disk working body for ground development

2021 ◽  
Vol 274 ◽  
pp. 11006
Author(s):  
Ramil Gainutdinov ◽  
Minsur Zemdikhanov
Keyword(s):  
Cutting Tool ◽  
Cutting Edge ◽  
Displacement Velocity ◽  
Technological Parameters ◽  
Variable Parameters ◽  
Main Design ◽  
Complex Trajectory ◽  
Working Bodies ◽  
Rates Of Growth ◽  
Base Machine

High rates of growth in the volume of earthworks in winter, with a lack of funds for the purchase of new equipment, determine the relevance of work to improve the existing and create new working bodies for the development of frozen grounds and snow-ice formations to increase the efficiency of their destruction without increasing the power of the base machine. This can be done by installing a fundamentally new cutting tool in the form of elliptical circular knives on the working bodies. The article deals with the kinematics of an ellipsoidal disk working body. Expressions for determining the displacement, velocity and acceleration of the point of the cutting edge of the disk are obtained analytically. It was found that the points of the cutting edge of the disk move in space along a complex trajectory, and the absolute values of velocity and acceleration are variable parameters. The regularity of the change in the angle of entry of the disk into the ground at different values of the angle of its attachment to the shaft of the working battery was revealed, and the main design and technological parameters were determined and substantiated.

Justification of design parameters of the fractional reaping conveyor and its devices for removal of beveled stems from under the wheels of the vehicle

2019 ◽  
Vol 1 (3) ◽  
pp. 1-10
Author(s):  
Mikhail M. Konstantinov ◽  
Ivan N. Glushkov ◽  
Sergey S. Pashinin ◽  
Igor I. Ognev ◽  
Tatyana V. Bedych
Keyword(s):  
Optimal Design ◽  
Technological Process ◽  
Design Parameters ◽  
Theoretical Studies ◽  
Optimal Parameters ◽  
Belt Conveyor ◽  
Grain Crops ◽  
Mode Of Operation ◽  
Optimal Values ◽  
Main Component

In this paper we consider the structural and technological process of the combine used in the process of separate harvesting of grain crops, as well as a number of its parameters. Among the main units of the combine, we allocate a conveyor and devices for removing beveled stems from under the wheels of the vehicle. The principle of operation of the conveyor at different phases of the Reaper and especially the removal of cut stems from under the wheels of the vehicle during operation of the Reaper. The results of theoretical studies on the establishment of the optimal design of the parameters of the belt conveyor are presented, the ranges of their optimal values are considered and determined. Studies on the establishment of optimal parameters of the screw divider in the Reaper, which is the main component of the device for removal of beveled stems, are presented. Taking into account the optimal design and mode of operation of the screw divider, the correct work is provided to remove the cut stems from under the wheels of the harvester.

Improving the efficiency of hardening of tillage machine working bodies by arc surfacing using wear-resistant rollers

2020 ◽  
pp. 176-185
Author(s):  
Dmitriy B. Slinko ◽  
Vyacheslav A. Denisov ◽  
Dmitriy A. Dobrin ◽  
Andrey V. Afanas’yev ◽  
Pavel M. Kislov
Keyword(s):  
Wear Resistance ◽  
Operating Time ◽  
Field Tests ◽  
Electric Arc ◽  
Cutting Edge ◽  
Linear Size ◽  
Research Purpose ◽  
Cored Wire ◽  
Wear Resistant ◽  
Working Bodies

Reducing operating costs during soil processing and increasing the wear resistance of parts and components is an important condition for reducing the cost of agricultural products, increasing its efficiency and competitiveness. The development of materials with increased wear resistance and new effective technologies for strengthening working bodies in their manufacture is now becoming an urgent task. (Research purpose) The research purpose is increasing the wear resistance of the working bodies of soil-processing machines by electric arc surfacing. (Materials and methods) During the experimental study, it has been performed testing of modes and surfacing of a pilot batch of working bodies from Kverneland for field tests in VIM on an automated installation for electric arc surfacing. Authors used eutectic CastolinEnDotec DO*30 powder wire with a diameter of 1.2 millimeters and a boron content of up to 4 percent for surfacing wear-resistant rollers, which allows to obtain wear-resistant rollers with a hardness of up to 65 HRC without pores and cracks. (Results and discussion) It has been revealed that hardened ploughshares that have passed field tests are subject to lower wear rates compared to non-hardened ones. It was found that when operating time is 24.785 hectares per ploughshare, the wear of the linear size of the cutting edge along the width of hardened ploughshares is on average up to 10-11 millimeters less than that of non-hardened ones. It was found that when processing 228 hectares, the wear of the linear size of the cutting edge along the width of hardened bits is on average up to 9-10 millimeters less than that of non-hardened ones. (Conclusions) The technology of surfacing with intermittent wear-resistant rollers provides an increase in the efficiency of hardening of Kverneland working bodies according to the criterion of wear resistance by an average of 20-30 percent. The adjusted technological parameters of the surfacing process will reduce the wear rate and increase the service life of the blade part of the working bodies, as well as reduce the amount of surfaced material by an average of 60 percent. The continuation of work on strengthening the working bodies should be aimed at changing the surfacing scheme and choosing a cheaper domestic cored wire.

Substantiation of amplitude-frequency characteristics and design parameters of vibration exciter in volume oscillation separator

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
I Palamarchuk ◽  
◽  
V Vasyliv ◽  
V Sarana ◽  
M Mushtruk ◽  
...  
Keyword(s):  
Translational Motion ◽  
Operating Conditions ◽  
Design Parameters ◽  
Vibration Velocity ◽  
Vibration Exciter ◽  
Lagrange Equations ◽  
Bulk Materials ◽  
Vibrating Screen ◽  
Working Bodies ◽  
Oscillating Motion

The main effects of the developed design for vibratory separator: the increased driving force in the process of bulk material separation in this work, achieved by providing the working cylindrical-conical container with vibrational motion; improving the conditions for the passage of product particles through openings, achieved by providing the sieve surface with volume oscillations; reduction of energy consumption and improvement of operating conditions for support nodes during the operation of the designed vibrating screen, achieved due to the installation of additional elastic elements between the separator body and bearing assemblies of the vertical drive shaft in vibration exciter. Providing the working bodies of the designed vibrating screen with volume oscillating motion allows increasing the performance and quality of the separation process of solid bulk materials. To determine the rational parameters for vibration screening process, the equations of motion of working bodies as a conical sieve surface were obtained using the method of the Lagrange equations of the second order. When applying solutions of the Cauchy problem for linear nonhomogeneous differential equations, the solution of the latter was obtained. The obtained dependences of oscillation amplitudes, vibration velocity and vibration acceleration, and the intensity of oscillating motion allowed us to perform a mathematical analysis for power and energy parameters of vibration drive in the developed separator. The inclined placement of the conical sieve surface allows for spatial gyration or circular translational motion, which makes it possible to realize the advantages of volumetric separation of bulk materials. The results of the conducted analytical study made it possible to substantiate the optimal inclination angle for working sieve surface. Based on our analysis, the design parameters of vibration exciter were substantiated and clarified, and the design of this technical system was demonstrated.

scholarly journals Theoretical and experimental substantiation of the design parameters for the working body of a row cultivator

2019 ◽  
Vol 126 ◽  
pp. 00051 ◽  
Author(s):  
Evgeny Zykin ◽  
Svetlana Lazutkina
Keyword(s):  
Weed Control ◽  
Cultivated Plants ◽  
Design Parameters ◽  
Weed Plants ◽  
Working Bodies ◽  
Experimental Substantiation

The authors of the article propose the design of a row cultivator, equipped with combined working bodies, which makes it possible to carry out inter-row weed control in one pass with full cultivation of the protective zones of grown crops. The soil drop distance and the distance between the flat discs located in the adjacent gangs of the row cultivator for thorough covering weed plants with a layer of soilwithout damage to cultivated plants have been substantiated theoretically.

Stress Analysis on the Cutting Edge Based on Design of Micro-Cutting Tool

2013 ◽  
Vol 589-590 ◽  
pp. 395-398
Author(s):  
Fang Jiang ◽  
Xi Bin Wang ◽  
Zhi Bing Liu ◽  
Huai Ming Wang
Keyword(s):  
Stress Analysis ◽  
Cutting Tool ◽  
Extreme Value ◽  
Tool Design ◽  
Cutting Edge ◽  
Micro Cutting ◽  
Blunt Edge ◽  
Edge Based ◽  
Cutting Tool Design

Stress analysis on wedge zone is an important step for micro-cutting tool design. The effect of stress borne by the cutting tool upon the radius of its blunt edge was analyzed, when the tool machines with minimum cutting thickness which is confined within 10-4-10-2mm. It shows that the minimal extreme value of the radius of blunt edge is existed in the process of micro-cutting tool design.

Flutter of Mistuned Turbomachinery Rotors

1984 ◽  
Vol 106 (1) ◽  
pp. 25-33 ◽  
Author(s):  
O. O. Bendiksen
Keyword(s):  
Perturbation Methods ◽  
Arbitrary Order ◽  
Design Parameters ◽  
Complex Conjugate ◽  
Form Complex ◽  
Stable Mode ◽  
Single Degree Of Freedom ◽  
Reduced Frequency ◽  
Left And Right ◽  
The Stability

An investigation of the fundamental aspects of flutter in mistuned turbomachinery rotors is presented. Perturbation methods are used to obtain asymptotic solutions to arbitrary order in the mistuning parameter. These solutions require only the knowledge of the eigensolution of the tuned system, and thus provide efficient formulas for calculating the effect of mistuning without solving a new eigenvalue problem. Numerical results presented for design parameters representative of fan rotors indicate that a critical reduced frequency exists, below which mistuning alone cannot stabilize the rotor. The sensitivity of the stability boundaries to mistuning was found to depend fundamentally on relations between the left and right eigenvectors. For systems where the left and right eigenvectors form complex conjugate pairs, mistuning cannot destabilize the system unless the reduced frequency of the least stable mode is decreased by the perturbation. In general, only cascades and rotors with a single degree-of-freedom per blade belong to this class.

scholarly journals Simulation Technique of Kinematic Processes in the Vehicle Steering Linkage

2018 ◽  
Vol 7 (4.3) ◽  
pp. 120 ◽  
Author(s):  
Sergii Chernenko ◽  
Eduard Klimov ◽  
Andrii Chernish ◽  
Olexandr Pavlenko ◽  
Volodymyr Kukhar
Keyword(s):  
Three Dimensional ◽  
Simulation Technique ◽  
Design Parameters ◽  
Three Dimensional Model ◽  
Design Data ◽  
Power Characteristics ◽  
Left And Right ◽  
Turning Radius ◽  
The Impact ◽  
The Mathematical Model

The results of the investigation of the turning kinematics of the steerable wheels of the KrAZ-7634NE off-road vehicle with a wheel formula 8x8 and two front steer axles are given. The theoretical relations between the steer angles of the steerable wheels on the basis of the scheme of double-axle steering turning of the vehicle are shown. The mathematical model of flat four-bar vehicle steering linkage is developed, it determines the relation between the steering linkage left and right steering arms turning angles at any turning radius of the vehicle. KrAZ-7634HE steering three-dimensional model was created and simulation technique of its work was carried out using Creo software. It has been shown that the flat steering linkage model provides sufficient accuracy of calculations in analysis of turning kinematics. The design data can be used for any vehicles that have a similar steering linkage, they allow to analyze the impact of the vehicle design parameters on the turning kinematics and optimize them. Further study of the impact of the kingpin inclinations on the steering linkage kinematic and power characteristics are required.  

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