Use of an Elastic-Damping Mechanism in the Tractor Transmission of a Small Class of Traction (14 kN): Theoretical and Experimental Substantiation

Use of an Elastic-Damping Mechanism in the Tractor Transmission of a Small Class of Traction (14 kN): Theoretical and Experimental Substantiation

Sergey Evgenevich Senkevich (Federal Scientific Agroengineering Center VIM, Russia), Nikolay Viktorovich Sergeev (Don State Agrarian University, Russia), Evgeniy Konstantinovich Vasilev (Federal Scientific Agroengineering Center VIM, Russia), Zakhid Adygezalovich Godzhaev (Federal Scientific Agroengineering Center VIM, Russia), and Vugar Babayev (Agrarian Science and Innovation Center of the Ministry of Agriculture of Azerbaijan, Azerbaijan)
DOI: 10.4018/978-1-5225-7573-3.ch006
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Each modern tractor should be adapted to perform an increasing number of various traction, transportation, and other works. Therefore, their designs are becoming more complex. To improve tractor productivity, the power-to-weight ratio and the speed of its units are constantly increasing. This inevitably improves dynamic loading of the chassis and the transmission parts, the level of the generated oscillations, which increases the vibration load of the transmission. One of the promising ways to solve this problem is to introduce elastic links into the tractor transmission closer to an engine or a clutch. Installed closer to the engine, the elastic element in the transmission of the tractor absorbs the impact of the shocks, protecting the tractor engine from large dynamic loads. The material of the chapter contains studies confirming the efficiency of the use of an elastic mechanism (closer to the engine) in the tractor transmission of a small class of traction (14 kN).
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General Contents

Theoretical Substantiation

Achievement of permanent growth of agricultural production, the population can be provided with food and agricultural raw materials due to the improvement of technical level, quality and durability of agricultural machinery and the widespread introduction of scientific and technological achievements aimed at increasing the efficiency of its use (Denisov, 2005;Nekhoroshev, 2014; Hansson, 2002).The improvement of mobile agricultural machinery, its efficiency, technological efficiency and reliability, the traction-dynamic and economic characteristics of machine-tractor units (MTAs) in their set-making and operation in production are of great importance in the solution of these problems (Iofinov & Mikuberg, 1971; Zoz &Grisso, 2003).

The most technological operations result in overexpenditure of fuel, energy and money costs per unit of received products and processed area. This occurs because of the inconsistency of traction characteristics of the tractor and the aggregated machines at operating speeds and, as a consequence, the lack of an optimum load of the engine by traction (Kutkov, 1980).

The introduction of the latest achievements of science, technology and advanced technologies is of great importance in the development of agricultural production efficiency. The main task in the development of a new system of machines for agricultural production is to increase their productivity, to reduce fuel consumption in various types of work, to decrease the negative consequences of the interaction of the engine with the soil to a minimum. Each modern tractor must be adapted to perform an increasing number of different traction, transport and other works, therefore their designs become more complex. To increase labor productivity, the power-to-weight ratio of tractors and speed of their parts are constantly increasing. But this inevitably leads to an increase in the dynamic loading of the chassis and transmission parts and to an increase in the level of generated oscillations, which increase the vibration load of the working place of an operator.(Antonov, 1978; Hansson, 1994; Gurhan, &Cay, 2008; Duke & Goss, 2007; Marjoram at al, 2008; Zheng at al, 2016; Deboli at al, 2017; Pobedin & Shekhovtsov, 2016).

The negative consequences of these impacts can and should be decreased by installing additional damping devices in the tractor transmission. The effectiveness of their installation has been proved by many researchers (Polifke, 2017; Polifke, 2016; Feuerhuber at al 2013; Hansson, 2002; Fritz & Elsner, 2002).

We have made an attempt to prove the efficiency of introducing a traction mechanism of a damping mechanism into a tractor transmission of a small class. Its theoretical and experimental parameters have been justified. Its effectiveness has been proved.

Key Terms in this Chapter

Multifactorial Experiment: Is an experiment that involves varying several factors, possibly influencing upon the studied phenomenon.

Spectral Density Function (or Power Spectrum): Refers to the characteristics by which the basic properties of stationary random processes are analyzed. The spectral density function characterizes the harmonic composition of the studied process and determines the energy spectrum.

Elastic-Damping Mechanism (EDM): Is a mechanism that damps vibrations and dissipates energy inside the system under the effect of cyclic loads. In this case, the mechanical energy of the oscillations is converted into the thermal energy.

Degree of Transmission Transparency (Transmission Transparency): Is the degree of filtration of oscillations from an external load to a power unit (engine). A very rigid transmission is called transparent, that is, one that passes a reactive external load through itself without any changes.

Machine-Tractor Unit (MTU): Is a tractor connected to a working machine or machines. A tractor in the unit is a source of mechanical energy which helps the machine to move around the field, for example when a tractor pulls a cultivator.

Correlation Function: Is a function of time and spatial coordinates, which determines the correlation in systems with random processes.

Gearboxis (GB): A change speed gearbox for changing the torque and for transfer it from engine to wheels.

Regression Analysis: Is a statistical study of the effect of one or several independent variables on a dependent variable.

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