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Development of wood-polymer composite materials for sliding bearings of friction units of seed screw conveyors

Field of Science:EngineeringEngineering (miscellaneous)Industrial and Manufacturing Engineering
National field of science (HAC):01.02.02 — Dynamics and strength of machines, instruments and equipment01.02.03 — Mechanics of soils and rocks01.02.04 — Mechanics of deformable solids01.02.05 — Fluid and gas mechanics01.04.01 — Instruments and methods of experimental physics01.04.04 — Physical electronics01.04.10 — Semiconductor physics04.00.10 — Geotechnology (open-pit, underground and construction)04.00.04 — Hydrogeology and engineering geology04.00.09 — Mine surveying04.00.11 — Well drilling and development technology04.00.12 — Construction and operation of oil and gas pipelines, bases and storage facilities04.00.13 — Development and operation of oil and gas fields04.00.14 — Mineral processing04.00.15 — Technology and engineering of geological exploration04.00.16 — Mining machinery04.00.17 — Physical processes in mining05.01.01 — Engineering geometry and computer graphics. 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“TEXTILE JOURNAL OF UZBEKISTAN” Scientific-technical journal

“TEXTILE JOURNAL OF UZBEKISTAN” Scientific-technical journal

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This paper presents research results on the possibility of manufacturing sliding bearings for friction units of screw conveyors used in cotton seed transportation from wood-polymer composite materials. To develop a composite material for sliding bearings, the physical and mechanical properties of its main components were studied based on standard materials used in mechanical engineering. Willow wood, widely available in the Republic of Uzbekistan, is proposed as the wood component for composite materials. For impregnating the wood-composite material, a hot-cold bath method is proposed, and for wood compaction - an evaporation method with corresponding implementation technologies. A portable hardness tester model MED UD was used to measure the hardness of samples. The research results show the relationship between the physical and mechanical properties of wood and its degree of compaction. It was established that wood density is directly proportional to the degree of compaction, and this relationship has a linear character. The results also show the dependence of wood strength limit, its hardness, and modulus of elasticity along fibers on the degree of compaction. The effect of wood saturation with polymer composite was studied, and comparative results are presented; if in the initial state, for example, willow has a density of 0.49 g/cm³ and hardness of 4.73 MPa, then after saturation with polymer composite, the density reaches 0.89 g/cm³ and hardness up to 8.05 MPa, while additional compaction increases these values to 1.01 g/cm³ and 10.17 MPa, respectively.

AUTHORS

X.Абдугаффаров

TOSHKENT TO'QIMACHILIK VA YENGIL SANOAT INSTITUTI

Tags

# screw conveyor# cotton ginning industry# sliding bearing# wood-polymer composite materials

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References

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