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Laws of power transmission on branches of double-split hydrostatic mechanical transmissions

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 16 May 2013

Published on 15 November 2012

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Authors:

I.A. Таrаn, Cand. Sci. (Tech.), Associate Professor, State Higher Educational Institution “National Mining University”, Head of the Department of Transport Management, Dnipropetrovsk, Ukraine

Abstract:

Purpose. To determine relationship of circular transmission number of closed loop with the character of power transmission change in hydrostatic mechanical transmissions as well as laws in the character of changes within both circulatory and non-circulatory modes over the range of service conditions for hydrostatic mechanical transmissions.

Methodology. Theoretical studies of transmissions are based on the key issues of theory of machines and mechanisms and on the theory of closed double-split transmissions.

Findings. Relationships of character of changes in power circulating in double-split stepless hydrostatic mechanical transmissions and their efficiency loss in hydrostatic mechanical transmissions, laws concerning the character of circulatory and non-circulatory modes changes over the range of service conditions for hydrostatic mechanical transmissions has been established. In future it will help to determine relationships between circular transmission loop of double-split hydrostatic mechanical transmissions and the control parameter of hydrostatic transmissions in the context of planetary gear in output and input.

Originality is in analysis of distribution of powers circulating in double-split stepless hydrostatic mechanical transmissions with loss of their efficiency, determination of relationships of power distribution between brunches of double-split hydrostatic mechanical transmissions in the process of their performance as transport means, and strict demonstration of lemma concerning availability or absence of circulating power within double-split hydrostatic mechanical transmissions that is the basis of scientific substantiation of the methodology of stepless variable double-split hydrostatic mechanical transmissions under any working mode both for traction and transport velocity ranges of any transport means including mine diesel locomotives.

Practical value is in using laws of formation and transfer of power paths within transmission components to substantiate the type of transmission required for necessary moving force and stepless cruise control of diesel locomotives within the given range when diesel engine has constant frequency of crankshaft rotation for minimum discharges and fuel consumption. Distribution of paths limits restricts both structure and kinematic scheme of double-split stepless transmission. It should give only parallel power paths from the engine to driving wheels of traction and transport machine for any nonreversible variator.

References:

1. Динамика транспортно-тяговых колесных и гусеничных машин / [Александров Е.Е., Волонцевич Д.О., Карпенко В.А. и др.] – Харьков: ХГАДТУ.– 2001.– 642 с.

Aleksandrov, Ye.Ye., Volontsevich, D.O. and Karpenko, V.A. (2001), Dynamika transportno-tiagovykh kolesnykh i gusenichnykh mashyn [Dynamics of Transport-Hauling Wheeled and Caterpillar Machines], KHHADTU, Kharkiv, Ukraine.

2. Самородов В.Б. Уточненная методика определения потерь в планетарных механизмах передач и результаты исследования потоков мощностей в гидрообъемно-механических трансмиссиях / Самородов В.Б., Волонцевич Д.О., Рогов А.В. // Интегрированные технологии и энергосбережение.– Харьков: НТУ “ХПИ”.– 2001.– №. 4. С. 76–83.

Samorodov, V.B., Volontsevich, D.O. and Rogov, A.V. (2001), “The specified method of determination losses in the planetary mechanisms of transmissions and results of research of streams of powers in double-split hydrostatic mechanical transmissions”, Computer-integrated technologies and energy-savings, Published by NTU “KHPI”, Kharkov, no.4, pp. 76–83.

3. Самородов В.Б. Сравнение универсальных характеристик гидрообъемных передач, как элементов перспективных бесступенчатых гидрообъемно-механических трансмиссий украинских тракторов / В.Б. Самородов, М.Б. Бурлыга, А.А. Коваль // Східно-європейский журнал передових технологій. – Харків, 2009. – №5(35). – С. 27–30.

Samorodov, V.B., Burlyga, M.B. and Koval, A.A. (2009), “Comparison of universal descriptions of hydrovolumetric transmissions, as elements of perspective stepless double-split hydrostatic mechanical transmissions of the Ukrainian tractors” Skhidno-evropeyskiy zhurnal peredovykh technologiy, Kharkiv, no.5(35), pp. 27–30.

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