Operation simulation modeling of rotor brush cutter with hinged blades

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The necessity of forest thinning has been determined, and modern methods and equipment for their implementation have been identified. In order to increase the forest crops productivity, it is recommended to thin them. It has been established that the most productive is a mechanized method, in which the technological equipment such as a brush cutter, is located on the basis of wheeled or tracked machines. It has been determined that when developing new equipment for cutting shrubs, it is necessary to justify its parameters. The methods of developing new forest machines have been analyzed and the need for using automated design tools and compiling simulation models in modern software packages that are closely related to design programs has been identified. A simulation model of the brush cutter rotor operation has been created in the Universal Mechanism (UM) software package. The model is recommended for use when justifying the parameters of rotors with articulated working bodies. The links of the brush cutter working body in the simulation model are presented in a simplified form, the blade consists of a parallelepiped and two spheres at the edges, the rotor of the electric motor, the flange and the rotor of the brush cutter working body are in the form of a cylinder. The link models are parametric, which allows the simulation model to be adjusted to different geometric dimensions without losing the connections in the hinges. The simulation model uses 3D-contact interaction UM for the rotor and the chain. The acceleration, idle and braking phases of the rotor with an articulated, chain working element are studied. A laboratory experiment with a brush cutter rotor was conducted, which confirmed the chain motion trajectories obtained by means of simulation modeling. The blade speed at idle was calculated analytically, which confirmed the results obtained on the simulation model. The motion trajectories of the links, their speeds and torque costs on the drive shaft of the electric motor were obtained.

About the authors

Leonid D. Bukhtoyarov

Voronezh State University of Forestry and Technologies named after G.F. Morozov

Author for correspondence.
Email: vglta-mlx@yandex.ru

Cand. Sci. (Tech.), Associate Professor of the Department of Forest Industry, Metrology, Standardization and Certification

Russian Federation, 8, Timiryazev St., 394087, Voronezh

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