Combine harvester threshers operator workplace vibration load study and substantiation their secondary cushioning systems design principles

Sirotin, P. V.; Lebedinsky, I. Yu.; Sysoev, M. I.

doi:10.1063/1.5138457

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Однако, транспортная скорость указанного трактора [1] составляет 34,3…36,9 км/ч, при этом, отсутствие подвески существенно сказывается на ускорениях кабины трактора и кресла оператора при наезде на неровности дорожного полотна. В работах [2][3][4][5][6] приведены оценки виброускорений кабин оператора тракторов и зерноуборочных комбайнов. Исследуемые образцы техники способны развивать скорость до 40-50 км/ч, однако из-за существенных виброускорений, возникающих при движении, скорости передвижения ограничены, что в условиях постоян ного потока автотранспорта снижает пропускную способность автодорог.…”

Section: тракторы и сельхозмашиныunclassified

Experimental definition of lateral stiffness of a pneumatic wheel of the MTZ-82 “Belarus” tractor

Novikov,

Pozdeev,

Erontaev

et al. 2023

Tractors and Agricultural Machinery

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BACKGROUND: Due to the excessive vertical and angular vibrations of suspensionless vehicles used in agriculture and road construction that occur during movement, the velocity of their motion is limited, which, in the conditions of a constant traffic flow, reduces the road capacity. Therefore, the search for ways to improve the vibration-isolating properties of wheeled suspensionless vehicles is a relevant issue, the solution of which affects not only on traffic safety and driving comfort, but also on average speed and fuel efficiency. AIMS: To determine the lateral stiffness of the pneumatic wheel from the rear axle of the MTZ-82 Belarus tractor at different tire pressures, basing on bench tests. METHODS: On the basis of the hydraulic pulsation test rig of the Automatic Units department of the VolgGTU, a special-purpose movable supporting and measuring device was developed and assembled, the feature of which is that 4 rollers with flanges are installed on top of the hydraulic actuator force sensor, a flat rectangular base plate is supported on these rollers and connected with a vertical frame of the rig through a force-measuring device by means of a screw mechanism. The tested wheel is mounted on the base plate, the wheels axle is fixed on a vertically-moving traverse, on top of which weights creating the necessary vertical force are fixed. The test procedure consisted in measuring the lateral force and lateral displacement of the base plate until the tire slip occurred at the following tire pressures: at the recommended pressure of 0.16 MPa and at reduced pressures of 0.12, 0.08 and 0.04 MPa. RESULTS: Based on the test results, the elastic characteristic curves of the lateral stiffness of the tested wheel were obtained. These characteristic curves have a regressive form, as their slope significantly decreases with a significant reduce in tire pressure. Thus, when the tire pressure is reduced from 0.16 to 0.12 MPa, there is practically no difference in the obtained values of lateral stiffness, which reaches 112.5 kN/m. After a 2-fold tire pressure reduction, the lateral stiffness decreases by 7%, and after a 4-fold reduction, by 28%. At the same time, the static tire deflection increases from 22 to 32 mm, which significantly increases the contact patch of the tire with the ground. CONCLUSIONS: By means of the tests carried out, it is established that tire pressure reduction by 2550% of the recommended value does not have a significant effect on the loss of lateral stiffness of the pneumatic wheel of the rear axle of the MTZ-82 Belarus tractor, which is important to use in order to increase traction and improve ride comfort of wheeled tractors.

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Section: тракторы и сельхозмашиныunclassified

Experimental definition of lateral stiffness of a pneumatic wheel of the MTZ-82 “Belarus” tractor

Novikov,

Pozdeev,

Erontaev

et al. 2023

Tractors and Agricultural Machinery

View full text Add to dashboard Cite

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An Analytical Method for Calculating the Natural Frequencies of the Cab Carrier Systems Vibrations of Transport and Technological Machines

Sirotin

Lebedinsky

Perushkin

2022

Lecture Notes in Mechanical Engineering

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Mathematical model of the cabin suspension system for grain and forage harvesters taking into account the dynamic properties of the supporting system

Sirotin

Lebedinskiy

Zhileykin

2021

Traktory i sel hozmashiny

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The paper is devoted to the study of the vibrational state of the operator's workplace of a transport-technological machine with a supporting system that undergoes torsional and bending elastic deformations during operation. Based on the previously carried experimental studies, the rel-evance of the work was substantiated and the goal was set to develop a computational model of spatial vibrations of the cabin on a non-existent system in the form of elastic cantilever beams. An original mathematical model of cabin vibrations on an elastic foundation is presented. It takes into account the nonlinear elastic and dissipative properties of the supporting system structure. A variant of the implementation of the developed mathematical model using the example of the mathematical modeling environment Mathcad is proposed. As an example of calculating the dynamic properties of a bearing system, a case of using the MSC Adams software package with an integrated finite el-ement calculation module Flex is shown. It is presented that taking into account the dynamic prop-erties of the carrier system in the model makes it possible to calculate the vibration load of the cabin with high accuracy and reproduce the resonance phenomena caused by the natural modes of vibra-tion of the carrier system and disturbances from technological sources. The results of the verification of the computational model based on the analysis of the convergence of the values of the full corrected vibration acceleration in the center of mass of the grain harvester cabin, as well as the vi-bration spectra in linear directions obtained by experimental and computational methods, are pre-sented. Directions for the development of measures and technical solutions for improving the vibra-tion load of operators of transport and technological machines who have active sources of power disturbances on board, as well as a supporting system that experiences elastic deformations during operation are proposed.

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Combine harvester threshers operator workplace vibration load study and substantiation their secondary cushioning systems design principles

Cited by 3 publications

References 3 publications

Experimental definition of lateral stiffness of a pneumatic wheel of the MTZ-82 “Belarus” tractor

Experimental definition of lateral stiffness of a pneumatic wheel of the MTZ-82 “Belarus” tractor

An Analytical Method for Calculating the Natural Frequencies of the Cab Carrier Systems Vibrations of Transport and Technological Machines

Mathematical model of the cabin suspension system for grain and forage harvesters taking into account the dynamic properties of the supporting system

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