All articles - Mechanics
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Technology for creating a device for laminar flow of water in pipesThe article discusses the mathematical modeling of the movement of viscous incompressible fluids through a bundle of tubes located inside the outer pipe. The laminar and turbulent modes of this movement are considered, and the physical meaning of their occurrence is also analyzed. The fluid flow through n tubes of length L and radius r located inside the outer tube is considered. Calculation formulas are derived for calculating the maximum velocity of this flow, the volume of fluid passing through the cross section of the tube, the coefficient of resistance to friction in the tube along the length of the flow, and also the maximum value of the tangential stress. The results of the study of the relationship of the coefficient of resistance to friction in the tube with the Reynolds number are presented. A description is given of a device created according to the results of a study that brings the disordered flow of liquids into a laminar state
Scientific research results in pandemic conditions (COVID-19) -
“Mexanikada saqlanish qonunlari” mavzusini o’qitishda pedagogik texnologiyalarning o’rni
Green chemistry and sustainable developmentBugun jamiyatimizda qanday yutuq va marralarga erishgan bo‘lsak, ularning zamirida biz tanlagan va butun dunyo e’tirof etgan, “O‘zbek modeli” deb nom olgan taraqqiyot yo‘li turibdi. Ana shu yo‘lning ajralmas qismi bo‘lgan, yoshlarimizning ongu tafakkurini, hayotga bo‘lgan munosabatini tubdan o‘zgartirgan ta’lim-tarbiya sohasi rivoji, har tomonlama etuk avlodni tarbiyalash, yuqori malakali kadrlar tayyorlashda muhim ahamiyat kasb etmoqda.
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Sanoat changli gazlarni tozalovchi apparatni samaradorligini aniqlash
Информатика и инженерные технологииMaqolada changli gazlarni ho‘l usulda tozalovchi apparatni sanoatda qo‘llash va uning tozalash samaradorligini aniqlash rejimlari tavsiya etilgan.
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Inersiyali skrubber ishchi suyuqlikni purkovchi mexanizmini jarayonga tadbiq qilish
Информатика и инженерные технологииBugungi kunda dunyoda sanoat changlari va changli gazlarini tozalashda xo‘l usuldan foydalanish tendensiyasi ortib bormoqda. Ho‘l usul dispers sostavi yuqori (zarra o‘lchami 5 mkm kichik) bo‘lgan zarralarni suyuqlik muhitida ushlab qolishda samarali hisoblanadi.
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Substantiation of strength parameters of the carcass of the cabin of tractor of a class 1,4
Catalog of abstractsSubject of the inquiry: the protective carcass of a cabin of universal wheel tractor-cultivator.
Aim of the inquiry: design procedure working out on durability and the substantiation of strength parameters of the carcass of cabin of tractor of a class 1.4.
Methods of inquiry: Researches were spent by methods of mathematical and experimental modeling of deflections of elements of the bearing carcass of the cabin of the tractor at overturning in quasi-static to statement
The results achieved and their novelty:
- the mathematical model of calculation of the carcass of the cabin of the tractor on durability is made;
- the design procedure of the protective carcass of the cabin of the tractor on durability taking into account process of distribution of a zone of plastic deformation on length and height of cross-section section of elements of the construction of the carcass;
- Dependences strength properties of rod elements of the construction of the carcass from the bend and curvature moment.
Practical value: the cabin design procedure on the durability is developed, allowing at a design stage and operational development of a design with high degree of reliability to receive demanded strengthening characteristics (the Patent for the computer program № DGU 01583). The multiple analysis of the construction of the cabin of tractor TTZ 80.20 is carried out and the new carcass of the cabin of the tractor (the Patent for utility model № 1'AP 00563) is offered.
Degree of embed and economic effectiveness: Results of work are transferred to special design engineering bureau “Tractor” for practical use at carrying out of developmental works on modernization and construction development of new carcass of cabins of tractors.
Sphere of usage: automobile construction and tractor construction. -
The basis of the transmission ratio of the steering wheel of the wheeled tractors, 0.9-1.4 class”of the wheel tractor
Catalog of abstractsSubject of the inquiry: steering wheel of self-driven energetic vehicle means.
Aim of the inquiry: the aim of this inquiry is to rise the stability of the motion and conducting of self-driven means by rational choice of transmission ratio of the steering wheel.
Methods of inquiry : the analytical and experimental research methods are used in the work based on methods of automatic regulation theory.
The results achieved and their novelty: the character of the influence of the transmission ratio quantity on the sensitiveness of the machines the control and stability of the motion are used
The mathematical models for calculation of parameters of the motion of selfdriven energetic means with hydro-huged characters of the steering wheel and the choice of mounting coordinates of carried out hydrocylinders are worked out.
Practical value: the recommendations on the choice of transmission ratio of steering wheel and mounting coordinates of carried-out hydrocylinders rising stability of the motion and improving conduction of self-driven energetic means are worked out.
Mathematical models allowing to realize rational choice of parameters of steering wheel on the stage of project are created.
Degree of embed and economic effectiveness: recommendations on the choice of the quantity of transmission ratio of steering wheel and calculated definition of rational parameters of mounting hydrocylinders of the wheel implement are accepted for the usage in SSC (GAO) "Tashkent Tractor Plant".
Sphere of usage: tractor and agricultural machine-building.
