CC BY
10
Tillaev Mamjabbar Tillaevich, Professorr
Yunusov Saloxiddin Zununovich, Doctor, of Technical Sciences, Eshmurodov Dilmurod Dusmurod o'g'li,
Researcher,
Tashkent Institute of Textile and Ligh Industry Berdanov E. X., city. Tashkent. Uzbekistan Sirojiddin0213@bk.ru
PECULIARITIES OF PROCESSING MEDIUM-FIBER RAW COTTON ON SAWED GINS OF A NEW FORM OF WORKING CHAMBER
Abstract: The article presents calculations of the choice of the shape of the working chamber for saw gin, for this purpose, a block diagram of the algorithm and a program for determining the tangential forces, as well as the interaction between the raw roller and the saw cylinder, and the dynamics of the movement of the raw roller in the working chamber of the gin saw.
Keywords: saw gin, working chamber, ginning, raw roller, saw cylinder.
Analytical studies of saw gin and the influence of the On the basis of theoretical studies, a scheme of
rotation speed and the force of interlayer pressure of the interaction between a raw roller and a saw cylinder is
raw roller but qualitative and quantitative indicators of the ginning process are carried out. And they, in turn, depend on many factors: composition, mass, density, fibrousness and the number of exposed seeds of a raw roller. These factors largely depend on the shape of the working chamber [1].
To solve the pasted problem, it was necessary to study the structure of a raw roller. The material of the raw roller is a structural heterogeneous multiphase elastic medium consisting of raw cotton, partially gym fibers and seeds, as well as bare seeds and other small fractions.
In the bonding zone, the saw teeth of the saw cylinder interact with the pulp and a process takes place to capture and separate the fiber from the seeds. This zone is conditionally called the zone of contact between the saw cylinder and the raw roller. It can in turn be divided into zones: strong and weak contact, where the particles of the mass of the raw roller are hooked with the saw teeth of the saw cylinder and have the same speed with it. Further, the particle lags behind the speed of rotation of the saw cylinder by increasing the friction of the cotton against the walls of the working chamber.
compiled according to the generalized mechanical-mathematical model of the dynamics of the movement of a raw roller in the working chamber of the saw gin (Fig. 1).
To find the distance "a" it is necessary to determine the chords at the intersection of two circles. For this, solving together the system of equations, we determine
the coordinates of the intersection of circles.
2 2 2 x +Y =t
(x +138) + (y - 256)2
We introduce the following notation:
512 _T? -t2 -(1382 + 2562)
k 2 —- K 2 _-
2 276 2 276
As a result we have:
x = K2 y + K2
= -KlK2 ±J(K2K2)2 -(1 + K2)(K22 -t?) Yia 1+K?
Y = mm^iY?)
n . y
a =--arcsin—
2 ri
a = ax.
PECULIARITIES OF PROCESSING MEDIUM-FIBER RAW COTTON ON SAWED GINS OF A NEW FORM OF WORKING CHAMBER
Figure 1. The coring of the raw roller
Based on the results obtained, the main parameters of the gin working chamber are determined, which ensure an increase in the speed of rotation of the raw roller. Where is the designation: - the angular velocity of the saw cylinder 1 rad/s; - angular velocity of a raw roller, m.rad/s; -radius of the inner surface of the mass of the raw roller, m; P is the force of pressing the raw roller against the saw cylinder, H; a-length of the contact arc, m; Qz is the tangential force, H; R is the reduced radius, m; Rb-radius of the saw cylinder, m; Rb is the radius of the raw roller, m; Ex-reduced elastic modulus, N/m2; El-modulus of elasticity of raw cotton, N/m2; E2-modulus of elasticity of cotton seeds, N/m2; vl, v2 - Poisson's ratio (0 < vc < 0.5); q-distributed force, N/m; p0 is the initial distributed force of pressing the raw roller to the saw cylinder, N/m; N-power of the saw cylinder, W; «-frequency of rotation of the saw cylinder, min-1; ^x-relative slip, without dimension; VB-speed ofthe raw roller, m s; Vb - speed ofthe saw cylinder, m/s; f1.- coefficient of friction, pi - pi, Kx - base modulus N/m, K1 = K2 - modulus of the basis of nahmol-nogo compression, N/m; K1 = K2 - modulus of the base of tangential shear, N/m; x - contact zone of the saw cylinder and circe roller, m; d - capture area, m; c - prediction zone, m; ex is the unit vector; qx is the shear stress, N/m; m is the moment acting on the social cylinder of the saw cylinder on the circe roller, N/m; a is the angle between the vertical line of the saw cylinder and the radius, r1, Tx; - the atomic energy of the captured fiber, J; Based on
the results ofnumerical studies, a graph is plotted (Fig. 2.) -the forces ofpressing the raw roller to the saw cylinder and the working zone of the sawing arc, depending on the radius of the curvature of the working chamber [2].
It can be seen from the graph (Fig. 2) that with the growth of the radius of curvature of the working chamber, the working zone ofthe sawing arc "a" grows, and the force of pressing the "R" of the raw roller to the saw barrel decreases, which is associated with a decrease in the density of the raw roller and an increase in its elastic properties.
The change in the radius of the apron, the frontal bar and the opening of the working chamber by 185 mm, the radius of the upper part of the standard grate corresponding to this radius, and the distance between the vertical axis of the working chamber and the saw cylinder by 138 mm instead of 108 mm leads to a better grip of the saw tooth, the force from the side of the saw cylinder is better transmitted, thereby easily overcoming the rotation of the rotating mass of the raw roller, which in turn increases the speed of rotation of the raw roller and simultaneously reduces it density.
The modified version of the saw gin beats was installed at the Bukino cotton plant. At the Bukinsky cotton plant, there were 4 gin of the brand DPZ-180. One new genre of the working chamber was installed on one gin. Only the raw cotton of the breeding variety C-6524 was named in the plant, other raznovevinety was not cleaned according to the scheme for: 1/1 + V/3 varieties
according to the following technological process: 2SB-10 + dryer + TXA-6005 soft transportation + 1XK cleaner + cotton + yXK cotton cleaner 1XK cotton
cleaner + CC-15A separator + fflPX distribution auger + PD-feeder gin + ,n3-180 gin + 1VPU fiber cleaner + 5KV condenser + YES8237 pressed on the press fiber.
Figure 2. Radius of curvature of the working chamber
On both gins, an examination was carried out in 3 x repeaters and an average value was obtained. All equipment was both in production and worked without changing. The beams obtained shaped fibers and seeds of moisture and the amount of defects and other indicators.
The leveling of the two gin showed that the raw cotton of 1/1 grade showed. That the production of gins
10.6 kg of fiber per hour is 11.8 kg of fiber per hour, the grade and other items in the wire are 0.40% (abs) lower, the mechanical damage of seeds is 1.2% depended, the total fiber content depended on 0.1%.
The proposed working chamber has changed its configuration, the internal radius does not give a 1.5% increase in the speed of the raw fiber rotation.
References:
1. Tillaev M. T., Khodzhiev M. T. "Features of the saw jinning process". T. Fan,- 2005.- 156 p.
2. Tillaev M. T. "Examination of the working chamber of saw gin" // Zh.problemy textiles.- T; - 2012.
