Theory and traction calculation of an all-wheel drive tractor  [2014]

Kut'kov, G.M., The V.P. Goryachkin Moscow State Agronomical Engineering Univ. (Russian Federation) Soloveychik, A.A., All-Russia Research and Development Inst. of Mechanization of Agriculture, Moscow (Russian Federation) Sidorov, M.V., Moscow State Technical Univ., Kaluga Branch (Russian Federation)

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The existing theory of tractor calculation was designed for tractors with a major axis and does not take into account the peculiarities of distribution of power flows in four-wheel drive tractors with the wheel formula 4x4 and 6x6. It was developed method of traction calculation of two- and three-axle tractor with all-wheel drive for the calculation of the force and power characteristics of leading axes in the presence of kinematic inconsistencies in their drive. Initial data for traction calculation were following: traction class, purpose and propulsion unit type. Traction class was predetermined by two traction values: high value – tractor with full ballast or transport-technological module (TTM) and low value – tractor without ballast or without TTM. It was worked out the algorithms of calculating the tractor weight, the engine nominal operating power, taking into account the mechanical efficiency of transmission, slippage, traction, rolling resistance level ballasting and drives of TTM. Calculation of operating weight of power module and the tractor was performed taking into account the weight utilization factor at a force exerted rating without ballast and with the ballast. In the result of testing in the Kuban Institute for testing of tractors and agricultural machines (Krasnodar Krai, Russia) It was get the coefficients: without the use of weight – 0,392, and with the use of weight – 0.42. Rated operating capacity was determined as the sum of the po
wer consumed by front, rear axle and TTM singly. The calculation formulas of obtained value transmission efficiency, slippage, traction and rolling resistance are suggested. As a valid slippage value they applied a value equal to 14%. Calculations of the weight utilization factor of tractor with the three major axles on the applied method with test results in the Kuban Institute were compared exemplified by modular power equipment. Developed mathematical methods allow up to 0.01 (2.5%) to describe the all-wheel tractors main characteristics, which represents a trailing weight utilization factor.

Other subjects

  • calculation
  • modele mathematique
  • tractors
  • fuerza de traccion
  • mathematical models
  • modelos matematicos
  • russian federation
  • calculo
  • federation de russie
  • tractores
  • effort de traction
  • tracteur
  • tractive effort
  • calcul
  • federacion de rusia

From the journal

Agricultural Machinery and Technologies

ISSN : 2073-7599