Модель взаємодії дисперсного середовища ґрунту з поверхнею робочих органів ґрунтообробних та землерийних машин
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Date
2014
Authors
Аулін, В. В.
Тихий, А. А.
Aulin, Viktor
Tihiy, Andrey
Journal Title
Journal ISSN
Volume Title
Publisher
КНТУ
Abstract
В статті наведено механізм взаємодії РОГЗМ з дисперсним середовищем ґрунту та побудовано
математичну модель цього процесу, модель достатньо повно відповідає будові і взаємодії прилеглого до
РОГЗМ граничного шару ґрунту під час його обробітку. Наведено аналіз числа перетину абразивних
частинок по їх діаметру у випадку моно-і полідисперсного середовища ґрунту з використанням
геометрично-ймовірнісних методів. The article describes the mechanism of interaction between working parts of cultivation and digging
machines (WPCDM) to disperse the soil environment and the mathematical model of the process, which
sufficiently meets the structure and interaction of adjacent WPCDM soil layers during its cultivation.
The process of deterioration in tribosystem "WPCDM - ground" and highlighted the main factors
affecting the intensity of abrasive wear in bulk soil : the nature and shape of the structural components of the
material WPCDM; nature and hardness of the abrasive soil; degree of coherence abrasive soils in parts (AP); AP
pressure on the working surface WPCDM; wearing capacity of the soil.
Consider three basic types of fracture surface of the metal in the interaction of AP during wear
WPCDM and investigated the mechanisms of their occurrence. The influence of the ratio of the hardness of
alloys on the nature of their destruction by corrosion- mechanical wear.
With the physical modeling of the processes used similarity frictional interaction WPCDM from the
ground: it is necessary and sufficient that the model and the object "WPCDM -ground" realized almost identical
temperature and force fields . By analyzing the properties of the soil as particulate material and its deformation
properties considered that frictional interaction WPCDM of soil is determined by several criteria.
For theoretical analysis of contact interaction of dispersed soil environment with a solid surface
WPCDM taken AP spherical shape. The model soil on the following: the distribution of diameters corresponding
to research data on the fractional composition; for each fraction boundary layer of soil is half filled with abrasive
particles are uniformly distributed in the volume occupied ; normal force of abrasive particles that are included
in touch and at the same time acting on the solid surface WPCDM proportional to its cross -section; Growth of
the normal force is evenly distributed over all contacting AP.
To describe the density distribution of the size of AP in the soil used geometric - probabilistic methods
that make it possible to study AP stereometric characteristics of soil based on statistical analysis of crosssections
by planes parallel to the work surface WPCDM.
When creating models of real AP balls accounted for deviations from the regular geometric forms with form
factor, which is defined as the ratio of the largest size to the smallest or most probable value of this ratio.
Shows statistical description of geometry AP, that allows to specify their distribution in size and weight,
and get the equation compaction adjacent layer to WPCDM, given of stressedly-deformed state (SDS). The
dependence of the elastic contact area of the normal load goes from linear to non-linear, and the average pressure
becomes constant and is elastic firmness. Thus, at any time change the nature of the contact interaction and the
related deformation properties of the surface layer WPCDM.
Description
Keywords
ґрунт, абразивна частинка, робочий орган ґрунтообробної та землерийної машини, модель взаємодії, граничний шар, щільність розподілу, soil, grit, working parts of cultivation and digging machines, interaction model, the boundary layer, the density distribution
Citation
Аулін, В. В. Модель взаємодії дисперсного середовища ґрунту з поверхнею робочих органів ґрунтообробних та землерийних машин / В. В. Аулін, А. А. Тихий // Збірник наукових праць Кіровоградського національного технічного університету. Техніка в сільськогосподарському виробництві, галузеве машинобудування, автоматизація. - Кіровоград: КНТУ, 2014. - Вип. 27. - С. 140-149.