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Substantiating theoretically the parameters of the blade in-built in the drum group of shelling installation
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Rosaboyev Abdukodir Tuxtakuziyevich, candidate of sciences, the scientific institute of mechanization and electrification of agriculture E-mail: [email protected]
Imomqulov Umidjon Boqijonovich, junior scientist, the scientific institute of mechanization and electrification of agriculture, E-mail: [email protected]
Substantiating theoretically the parameters of the blade in-built in the drum group of shelling installation
Abstract: In article results that the curve-lined external let's substantiated dimensions of curve-lined external of the blade laterals, which has curve lined externals, mounted inside the drum of mobile shelling installation; in a purpose to form a curve-lined external by means of integral graphics method let's divide into parts the second order differential formula are resulted. As obtained calculations show that the curve-lined external of the blade laterals that means the externals of left side lateral radials are equal to R = 1601.0 mm., R2 = 339.0 mm., R3 = 159.02 mm.; R4 = 186.84 mm. and R5 = 601.5 mm.; the slope angles ax = 24° 28', a2 = 27° 09', a3 = 31° 49', a4 = 27° 08' and a5 = 31° 49'; the length Lh = 552.4 mm.; as above said the right side lateral is in the same formation with the drum wall and its length is unchangeable i. e. — Ll = Lh.
Keywords: agricultural seeds, mobile shelling installation, semi machine screw shaped blade, blade having curve lined externals, shelling, technologic process.
It is known that seeds of a certain agricultural sowings having improper formed structure and due to not a higher level of its free-running, will not give to seed at lower rates or exactly hole by hole on a ground. Considering these matters, in a purpose to make round formation and increase the free-running of agricultural crops it is proposed to implement shelling technology by using protecting-feeding compounds [1].
After applied the proposing shelling technology the round shaped higher level free-running seeds as well as almost with the same geometric sizes seed grains will come out. In its turn it will facilitate seeding the agricultural crops' seeds having improper formed structure and not a higher levelled free-running, at lower rates or exactly hole by hole on a ground.
On a basis of the shelling technology of agricultural seeds, the process of shell layer forming are carried out in due sequence order. In effort to form the shell layer the seeds firstly will be moistened by using glue and promoting typed liquid. In the shelling process the seeds inspired by the centrifugal force as well as at the account of sticking glue typed liquid begin to act together with the drum group basement and walls. The seed grains motion in proper way will result in unequal distribution of treated chemicals and shelling layer forming fistular fillers above side of seeds. It outcomes in not complete finishing the shelling technological process of the agricultural crops' grain seeds in the shelling installation and the smooth covering will not be formed at grains seeds externals [2].
Considering all above it is proposed to mount the semiscrew typed blade inside the drum group of shelling installation [3]. The
semiscrew typed blade together with drum group basement and walls selects out the acting grain seeds and thus it disturbs the sequent order. But due to that the lower side of the semiscrew typed blade has a straight lined external and mounted crosswise to grain seeds action, the grain seeds are knocked to the blade at higher strength and their motion direction changes.
Due to that the semiscrew typed blade is mounted inside the drum group at j = 16-25° degrees angle than the vertical axis, the grain seeds stop moving at the culmination peak, the angle rate equals to zero. In the event if semiscrew typed blade is installed at small angle than the vertical axis, the moving distance of the seeds inside the drum group will shorten and the layer of unmov-able seed drains will be formed. In such cases a certain part of seed grains is not equally be separated together with protective feeding mixtures but it results in not perfectly and completely implementation of the shelling technologic process at required level.
Taking into consideration of all above specified it is proposed to mount the blade with curve-lined externals inside a drum group of the mobile shelling installation. Proposed the blade with curve-lined externals sticks to the drum group basement and walls; by not decreasing the angles rate of the moving seed grains it separates them from the drum group basement and walls and in this case it disturbs the its sequent order motion. In effort for the curve-lined blade to separate the grain seeds from the drum walls completely it is necessary to fabricate same with drum wall as well as it doesn't shorten the distance occurring along with around the wall sides of the drum unit, should provide changing in movement direction.
Section 10. Technical sciences
The drum unit of the mobile shelling installation and semis-crew typed and the blades with curve-lined externals mounted inside it are shown in the figure 1.
Considering the change in movement direction by not shortening the rates of the grain seeds acting inside the drum unit in sequence, for the purpose to substantiate the blade formation having curve-lines external let's try to solve this matter by applying the differential formula of the second order [4]. To achieve the target let's divide the curve line forming curve-lined externals into several parts and pass cross sections along with the bows.
The status of the curve line forming curve-lined externals separated into several parts and pass cross sections along with the bows are shown in the figure 2.
Values of the length a and the height h of the cross section passed through the bow in the figure b is known and due to that radials R and slope angles a of curve-lined parts can be found from the following solutions.
R = -
, • a 2 sin—
, a a h = — tg—
(1)
(2)
Let's make several changes into (1) and (2) formulas, and settle the higher part radials of the curve-line external of the in-mounted blade inside the shelling installation drum group as in the following solutions: R1 = 560.0 mm., R2 = 560.06 mm., R3 = 391.12 mm., R4 = 505 mm. and R5 = 534.17 mm., slope angles a1 = 24° 28', a2 = 27° 09', a3 = 31° 49', a4 = 36° 24' and a5 = 34° 28', length L = 1082.3 mm., radial dimensions of the lower curved externals
sur '
R1 = 401.0 mm., R2 = 233.9 mm., R3 = 163.4 mm., R4 = 220 mm. and R5 = 217.5 mm., slope angles a = 24° 28', a2 = 27° 09', a3 = 31° 49', a4 = 36° 24' and a5 = 34° 28', length Ln = 387.6 mm.
On a basis of the radials calculated values of the curve-lined external separated into parts by using
R =f----(3)
|_cos f (x,y,tg
the above formula; as well as in a purpose to form a curve-lined external by means of integral graphics method let's divide into parts the second order differential formula [4]; let's combine the radials of bows separated into parts in effort to form a higher and lower curve lined externals of the blade mounted inside the drum group of the mobile (transportable) shelling installation. After all above carried out activities we can achieve the higher and lower curve lined externals of the blade mounted inside the drum group of the mobile shelling installation.
a) b)
Fig. 1. Drum group of the mobile shelling installation and in-built blades: a) semi machine screw shaped blade; b) blade having curve lined externals. 1 — drum group; 2 — semi machine screw shaped blade and blade having curve lined externals; 3 — mounting support
a) b)
Fig. 2. The status of the curve lines separated into parts which forms curve-lined externals (a) and the condition (b) passing through cross section of the curve-lined part
a
2
Modeling of dynamics of movement of fibres ulyuk a clap on a forward side of a tooth saw the cylinder of gin of the second step
In effort to settle the above specified formula and the curve-lined external let's substantiate dimensions of curve-lined external of the blade laterals, which has curve lined externals, mounted inside the drum of mobile shelling installation; in a purpose to form a curve-lined external by means of integral graphics method let's divide into parts the second order differential formula. As obtained calculations show that the curve-lined external of the blade laterals that means the externals of left side lateral radials are equal to R1 = 1601.0 mm., R2 = 339.0 mm., R3 = 159.02 mm.; R4 = 186.84 mm. and R5 = 601.5 mm.; the slope angles a1 = 24° 28', a2 = 27° 09',
a3 = 31° 49', a4 = 27° 08' and a5 = 31° 49'; the length Lh = 552,4 mm.; as above said the right side lateral is in the same formation with the drum wall and its length is unchangeable i. e. — Ll = Lh
Thus the blade having curve-lined externals formed by means of applying the integral graphics method ofthe second order differential formula is used to implement shelling of the agricultural seeds being treated at the shelling installation by not facing it to the powerful affection facilitates to changing its action at certain angle degrees. And in its turn it outcomes in the growth of efficiency in shelling process of the agricultural crops grain seeds at the shelling installation.
References:
1. Patent Rep. Uzb.: № 1015837. Ways ofbeardy cotton plant seeds coating/Sh. I. Ibragimov and others//B. I. - 1983. - № 17.
2. Yesirkepov B. Clarification of technologies and substantiating the parameters of the pelletizing machine beard cotton plant seeds: Synopsis of thesis ...Candidate of Sciences. - Yangiyul, 1995. - P. 17.
3. Patent Rep. Uzb.: № 1510745. Device for seeds pelletizing machine/N. Rashidov and others//B. I. - 1989. - № 36.
4. Piskunov N. S. Differential and integral calculus. In two volumes. - M.: Science, 1985. - 560 p.
Sobirov Ilxom Qaxramonovich, teacher of the Department "Theoretical and applied mechanics" Tashkent Institute of Textile and Light Industry, the Republic of Uzbekistan E-mail: [email protected]
Parpiyev Azimjon Parpiyevich, technical sciences associate, professor of the Department "Theoretical and applied mechanics" Tashkent Institute of Textile and Light Industry, the Republic of Uzbekistan E-mail: [email protected]
Djuraev Anvar Djuraevich, technical sciences associate, professor of the Department "Theoretical and applied mechanics" Tashkent Institute of Textile and Light Industry, E-mail: [email protected]
Modeling of dynamics of movement of fibres ulyuk a clap on a forward side of a tooth saw the cylinder of gin of the second step
Abstract: In article the technique of drawing up and the analytical decision of dynamics of movement of fibers ulyuk a clap on a forward side of a tooth saw the cylinder of gin of the second step is resulted. The analysis of movement of fibres ulyuk a clap from the cores system parametres is given.
Keywords: A clap, ulyuk, dynamics, movement, force of coupling, a friction, weight, frequency, amplitude.
In process fiber branch taking into account recycled ulyuk at dragging fibers ulyuka teethes saw the cylinder it is necessary for second step to overcome force of a friction between a fibre and weight raw chambers which depends basically on its density. If fibers ulyuk moves on a saw tooth, they will drop out of it what to lead to fibre returning uluk in raw the chamber at the expense of its small density. Therefore it is necessary to create sufficient force dragging fibers ulyuk. Thus force dragging fibers ulyuk from raw chambers of gin of the second step should be less, than force of breakage of fibers [1].
It is necessary to notice, that at dragging fibers ulyuk, fibers can move on a forward side of a tooth saw the cylinder. If movement of fibers aside to tooth top fibers it will not be pulled out from raw
chambers. Dragging can be only at motionless position or movement of fibers towards the basis of teethes saw the cylinder. Therefore theoretical studying of movement of fibers ulyuk on a forward surface of a tooth raw the cylinder is important.
On fig. 1 the settlement scheme of capture and dragging by a tooth saw the cylinder offibers ulyuk in saw gin of the second step is presented. For a conclusion of the equation describing movement of fibers ulyuk on a forward surface of a tooth saw of the cylinder it is accepted following assumptions: fibers ulyuk to consider as the concentrated weight; movement to occur only on a forward surface of a tooth; in a kind in comparison with other forces aerodynamic force without taking into account; saw the cylinder rotates with constant angular speed.
