Modeling of the Rotary Mechanism of the Hydraulic Manipulator of a Timber Truck
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2024, Vol 5, Issue 5
Abstract
The importance of loading and unloading operations in the technological process of wood hauling by timber trucks, as well as the need to improve the design of hydraulic manipulators, are considered. The most rational ways to increase the efficiency of their functioning are given. The disadvantages of traditional designs of hydraulic manipulator rotary mechanisms based on rack-and-pinion gears are presented. An improved design of the crank rotary mechanism of the hydraulic manipulator column from six hydraulic cylinders is proposed. The research methodology is based on the use of mathematical modeling. It has been revealed that the accumulated energy for one braking cycle when moving the load is about 1442 J. Considering that timber loading is carried out at a height of approximately 2 m, the recovery system allows approximately 12 % of the rotation energy to be directed to the load lifting operation. Over the entire range of change in the angle of the end of rotation, the recovered energy varies by only 7.1 % â from 1340 to 1442 J, and the load swing amplitude â by 1.2 % â from 0.336 to 0.340 m. It has been determined that with an increase in the length of the guide, the recovered energy decreases slightly â from 1564 to 1428 J (by 8.7 %) â and the load swing amplitude â from 0.344 to 0.339 (by 1.5 %). It has been found that over the entire angular range, the recovered energy varies from 1399 to 1442 J (by 3 %), and the load swing amplitude â from 0.3380 to 0.3393 m (by 0.4 %). The angular unevenness of the recovery efficiency indicators is no more than 3 %. To study the influence of the parameters of the crank rotary mechanism of the hydraulic manipulator column on the efficiency of energy recovery, a multifactor optimization problem has been solved. It has been established that the optimal value of the distance from the crank axis to the movable axes of the hydraulic cylinders of the rotary mechanism of the hydraulic manipulator column is 0.23â0.25 m, the optimal value of the displacement of the crank axis relative to the axis of the manipulator column is 0.17â0.18 m. At the same time, the recovered energy for 1 cycle of load moving is at least 1500 J, and the amplitude of the load swing is no more than 0.35 m.
Authors and Affiliations
Valeryi I. Posmetyev, Vadim O. Nikonov, Andrey Yu. Manukovskii, Viktor V. Posmetyev, Igor V. Kazakov
Keywords
Related Articles
- EP ID EP750049
- DOI 10.37482/0536-1036-2024-5-143-158
- Views 46
- Downloads 0
The Defectiveness of Spruce Stands in the Northern Taiga Zone of the Arkhangelsk Region
The results of studying the defectiveness of spruce forests in the northern taiga zone of the Arkhangelsk Region are presented. Defectiveness has a significant impact on the sanitary condition, marketability and sustaina...
Performance Assessment of the Drying Section of Machines for the Production of Tissue Paper Grades
The paper presents the method for assessment the performance of high-speed Yankee hoods in the production of tissue paper grades and the results of its use in working machine. The following parameters are found applying...
Growth of Vegetative Organs of Picea abies (L.) Karst. in Anthropogenic Environment
The studies were carried out in stands of various degree of devastation: in the city, suburban forests and forests of the green zone. Recreational loads strongly affect the sanitary condition of spruce forests. The numbe...
Plant Viability in an Urbanized Environment
The aim of the study has been to analyze the vitality of woody plants in an urbanized environment to solve the problems of landscaping a large city (using the example of Khabarovsk). The methods of geobotanical, forest i...
Experimental Evaluation of Strength of End Joints with Rectangular Pressed Fingers
End jointing of wooden blanks is widely distributed in the manufacture of wood products. The most commonly used splicing technology on finger joints with pointy fingers has a number of drawbacks, including the presence o...