Decrease of the Vibration Load Level on the Tractor Operator Working Place by Means of Using of Vibrations Dynamic Dampers in the Cabin Suspension

摘要

This paper is devoted to description of the method for decreasing of the vibration load level on the tractor operator working place using vibrations dynamic dampers in the cabin suspension. Standard cabin vibration isolators of tractors of DT and VT series include the monolith rubber block and have limited capabilities to change its elastic parameters and adapt in the course of the impact of vertical and lateral vibration loads with various frequencies. Elastic-damping properties of these vibration isolators doesn't allow one to provide comfortable conditions for the operator's work because their abilities of vibration damping aren't sufficient especially at low-frequency vibrations. Dynamic vibration dampers installed in the cabin suspension were proposed by authors for decreasing of the vibration load level on the operator's workplace. 3D- model of the caterpillar chassis, suspension, engine, cabin and operator's seat of the tractor was created in the software ‘Universal mechanism’ for performing of the computational research. This model was used to conduct research of sprung mass vibration for tractor motion with and without hook load at 3rd and 7th gears on the smooth surface and on testing areas with single, periodic and random bumps. Research results undoubtedly indicate the best vibroprotective properties of cabin suspensions with dynamic vibration isolators.