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Tukhtabayev Mirzokhid Akhmadjanovich, senior scientific-researcher, Scientific research institute of mechanization and electrification of agriculture Republic of Uzbekistan, E-mail: mirzoxidt_2011@mail.ru
TO SELECT OPTIMAL TIRE SETS FOR CULTIVATOR TRACTORS
Abstract: in article are brought to select optimal tire sets with some models for cultivator tractor TTZ 1030 and of its other modifications. It is substantiated in accordance with constructive and kinematic compliance of wheels' front and rear bridge of tractor.
Keywords: tire sets, cultivator tractor, row space, front wheel, rear wheel, loading, leading tire, directing tire.
Тухтабаев Мирзохид Ахмаджанович, научно-исследовательский институт механизации и электрификации сельского хозяйства, старший научный сотрудник-исследователь.
E-mail: mirzoxidt_2011@mail.ru
ВЫБОР ОПТИМАЛЬНАЯ КОМПЛЕКТА ШИН ДЛЯ ПРОПАШНОГО ТРАКТОРА
Аннотация: в статье приведены выбора оптимального комплекта шин некоторых моделей для пропашного хлопководческого трактора ТТЗ 1030 и её других модификацию. Обоснованы по конструктивному размеру и кинематическому соответствиям колес трактора передних и задних мостов.
Ключевые слова: комплекты шин, пропашной трактор, междурядья, передние колеса, задние колеса, нагрузка, ведущие шина, направляющие шина.
It's known that, use of four wheel tractors where row To select for the tire sets with another dimension, this
space of cotton during cultivation mustn't be allow load- must be kept indicated state on the along-vertical plain rec-
ing exceed or decrease on the bridge, it should be supplied ommended from industrial producers. For example, it is
ecological requirements agrotechnic indexes and compac- expedient accepting by condition below using of GOST
tion impact on soil, to be kept stability of tractors. (ГОСТ) 7463-2003, GOST (ГОСТ) 30238.1-96 and
Furthermore, using for four-wheel tractors using Good Year tire catalogs to select tire sets of front and rear
on cultivation in row space of cotton plant will have in- wheels of the tractor TTZ 1030 [1; 2].
RCT - rCT = Aconst, ( 1 )
creased of wheel tracks square and turning ground at the end of the field while bending. Inconsequence, it is
observed decreasing of soils exceed compaction, to be here RCT - static radius of rear wheels, m; crush of graft one part and decreasing fertileness. The rCT - static radius of front wheels, m; above-mentioned deficiency might be settle to select Aconst - difference between static radiuses of rear
through optimal turning method and minimal turning and front wheels mounted tire sets of recommended
radius and optimal tire sets of four-wheel tractors. from producers of tractor.
Section 8. Technical sciences
Picture 1. Kinematic dependence of front and rear wheels of TTZ1030 tractor by selecting tire sets
It is recommended mounting of tires to the front wheels 9.00-16 and to the rear wheels 13.6-38 or 13.6R38 to this tractor from industrial plant. If, it will be taking into account of static radiuses of these tires respectively, we will have following results by formula (1):
a) if, the tire is mounted for rear wheels 13.6-38 and for front wheels 9.00-16
Acons1 = 740-403 = 337 mm;
b) if, the tire is mounted for rear wheels 13.6R38 and for front wheels 9.00-16
Acons2 = 717-403 = 314 mm;
If, it is having a possibility to mount two types of tire, it is determined average values of formed by (1) formula, that is: Aav = (Acons1 + Acons2) /2. (1)
Table 1.
We will form following value using by formula (2)
Aav =(337 + 314 )/2 = 325 mm. The tires are selected to leading and directing wheels of the cultivator tractor TTZ 1030 according to this value (index value). We will separate determined value of constant Aconst from static radius of leading wheel tires. Inconsequence, the selected suitable tires of directing wheel of this tractor with near formed static loaded radius, contrarily for the leading tire of the wheel, which we will add the value statistic loaded radius of the leading wheel to constant value of Aconst. That is, the tire is influenced less to tractors' length permanent. Selected tires to the tractor TTZ 1030 are brought in table 1 in this way [3].
Selected tire sets to the tractor TTZ 1030
№ Leading tire R , mm A , mm Directing tire r , mm
1 16.9R38 0-52 770 325 11.00-16 SL; 11.2R20 445 450
2 18.4R38 0-111 800 11.2R20 450
3 16.9R38 (Good Year) 752 13.0/75R16; 10.00-16 SL 400 415
4 18.4R34 (Good Year) 726 13.0/75R16 400
5 18.4R38 (Good Year) 777 11.2-20; 11.2R20 460 450
To selection tire sets is taken the base of tractors basis wheel tires. It has to count Aconst separate for other types of tractor.
Follows that, other types of tire sets might be select according to formulas by (1) and (2) to all the types of TTZ tractors'. Because of this, it should be
take into consideration of tractors design and other dimensions.
Used to above (1) and (2) formulas, it might be select fitted tires sets to the wheels of the tractor TTZ 1030, which to take account of this length stability, manoeuvrability.
The results of carried out researches, selected all the directing front tires of the wheel to the cultivator tractor TTZ 1030 are satisfied the agrotechnic requirements. But, it is exceeded norm of the permitted ecologic requirement on soil. For this reason, it is demanded to select tires with larger overall dimensions and profile length that from front wheels (9.00-16; 12-16) dimensions.
It is not recommended using for row distance of these tires where to the leading wheels the profile length less than 15.5-inch that is mounted to the tractor the types of tires 13.6-38; 15.5-38, loading to tires is exceeded respectively 46 and 15 percent, and ecologic requirement the tire 13.6-38 is increased to 1.15 times. It will have decreased the output and increased the bending times when using these tires with coupled that in consequences ofless agrotechnic clearance of machine-tractor aggregates and one particular plant growing field in of the Republic. That is why, it is not recommended using in row space with 15.5-inch profile length and the tires less than this values.
These tires are allowed to use in row space 90 cm mounted with profile length more than 15,5 inch to the
tractor that they are satisfied the requirements with vertical loading, agrotechnic [4] and ecologic [5]. But, the tires profile length more than 18.4 inch value are applied in 90 cm row space that it will violates the agrotechnic requirements and damages the plant roots. They might be use until sowing operations while general soil tillage only.
Sudden damages and disabled tires using on tractor is brought to a stop doing agricultural works in farm. For instance, in this situation, when sowing is late for a day at spring season it will have negative influence to growing. Therefore, it is implied possibilities to fit other types of tires to the tractor also while for the purpose to prevent such these stops. That is why, to select other types of tires to the tractor is enabled using effectively from times.
Thus, based on results of carried out researches to take into consideration the 9,00-16 and 12-16 tires' pressure on soil are out of norm, they not to recommend to use in row space of cotton plants to the tractor TTZ 1030.
References:
1. Farm, speciality and terra-tire handbook / Good Year catalogue.
2. Farm and industrial tyres catalogue. Goodyear Luxembourg Tires S. A. - 2009. URL: http://www.goodyear. com.
3. Scientific basis of selection tires to agricultural tractors: monograph / M. Tukhtabayev, I. Tulanov. - Tashkent, "Tamaddun", - 2016. - 104 p.
4. Collection initial requirements to tractors of agricultural machines. - Moskva, - Volume 41. - Part II, -1988. -7 p.
5. GOST 26955-86, GOST 26953-86, GOST 26954-86 State standards union SSR. Mobile agricultural technic. Norm of influence of track-mover on soil. Determining the Methods of influence of track-mover on soil. Determining the Methods of proof normal stress on soil. - Moskva, Publishing house of standards, -1986. - 23 p.
