Stress Concentration and Shape Optimization for a Fillet Surface of a Step-Shaped Shaft

Erokhin, M. N.; Dorodov, P V; Dorokhov, Alexey

doi:10.3103/s105261882003005x

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…Similar studies were carried out by bench and full-scale tests of sliding friction units in order to increase accuracy and informational content of diagnostics of their technical condition [12][13][14]. However, thermal diagnostics of sliding units is performed only with consideration of a single factor of loadingthe shaft rotation speed, which is not enough [12], and evaluation of temperature fields of the friction clutch disk is performed in conditions of idealization of friction and wear processes [13].…”

Section: Fig 3 Results Of Simulation Of Temperature Fields Of Reaper Drive Cardan Joint Zaffrani 940nmentioning

confidence: 99%

“…However, thermal diagnostics of sliding units is performed only with consideration of a single factor of loadingthe shaft rotation speed, which is not enough [12], and evaluation of temperature fields of the friction clutch disk is performed in conditions of idealization of friction and wear processes [13]. As a result of such studies is an example of optimization of structural-technological parameters of stepped shafts [14]. Thus, the conducted studies expand the factors of diagnosing the operability of mechanical transmission units by thermal load, taking into account the influence of structural, technological and, most important, operational factors.…”

Section: Fig 3 Results Of Simulation Of Temperature Fields Of Reaper Drive Cardan Joint Zaffrani 940nmentioning

confidence: 99%

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Thermometric diagnostics of elements of reaper drive for sunflower harvesting

Pastukhov

Timashov

Кравченко

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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Ensuring failure-free operation of agricultural machinery in seasonal operation conditions is based on a maintenance system including diagnostics. A promising method of diagnosing the technical condition of mechanical transmission units is contactless thermometry based on measuring the intensity of infrared radiation of friction pairs. The purpose of the work is to verify the thermometric diagnostic method for mechanical transmission units of agricultural machinery. The results of experimental development of technology of thermometric nondestructive testing of the cardan joint of ZAFFRANI 940N reaper drive CLAAS TUCANO 570 grain harvester are presented in the work. The method of conducting the experiment included monitoring the temperature of parts and ambient air, the dynamic parameters of the reaper drive and the level of solar radiation. In order to implement the system approach, evaluation of the thermal state of the object of research was carried out at three hierarchical levels. The first level is represented by an analytical equation for determining the temperature in the friction zone. The second hierarchical level is implemented using CAE-technology, which makes it possible to establish the relationship of temperature in the friction zone and diagnostic temperature on the surface of the part. The influence of external heating factors at the third hierarchical level is due to solar radiation, which causes heating of the surfaces of the parts. To take this factor into account and compensate for the measured temperature values, a mathematical model of the thermal balance for the studied unit was developed, which includes thermal energy from solar radiation and energy supplied to the environment through convection and radiation. A summary of the results of the study confirms the effectiveness of thermometric nondestructive testing for mechanical transmission units using the example of bearing assemblies of the cardan joint of the reaper drive.

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Section: Fig 3 Results Of Simulation Of Temperature Fields Of Reaper Drive Cardan Joint Zaffrani 940nmentioning

confidence: 99%

Section: Fig 3 Results Of Simulation Of Temperature Fields Of Reaper Drive Cardan Joint Zaffrani 940nmentioning

confidence: 99%

Thermometric diagnostics of elements of reaper drive for sunflower harvesting

Pastukhov

Timashov

Кравченко

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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“…To study the normal and tangential contact stresses σz, τ, we use the singular integral equation [11][12][13][14][15]:…”

Section: Theoretical Researchmentioning

confidence: 99%

Simulation of the stress state during blade wear and optimal design of the grain crusher wheel

Dorodov

Kasatkin²,

Petrov

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Currently, in the manufacture of agricultural products in the process of feed preparation, closed-type grain crushers are widely used, working on the principle of suction of the starting material and injection of the finished product. This type of crushers undergoes significant abrasive wear of working bodies (drums, hammers, sieves, etc.) due to their suboptimal geometric shape of the transition surface, where local stresses accumulate, as well as in the areas of contact of parts with particles of gas-dispersed material. It is possible to investigate the causes of the rapid destruction of the working bodies of the crusher by theoretical methods and modeling of physical processes, which will increase the speed, economic efficiency, reliability in the design of components and mechanisms, as well as optimize the design of the upgraded paddle wheel. The paper presents a theoretical model of the stress state on the working surface of the blade, the adequacy of which is confirmed by experimental data with a correlation coefficient of more than 0.95. Studies have allowed optimizing the position of the blade, at which it must be positioned at an angle of 10 ° to the axis of the wheel of the crusher drum, while the contact stresses on the wear surface are distributed almost evenly. This design change will lead to uniform wear of the blade and, as a result, to an increase in durability and reliability of the crusher.

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