Force Analysis of Reciprocating Engine Using Dynamic Models of Crank Mechanism

Yamanin, A.I.; Zhukov, Vladimir A.; Baryshnikov, Sergey

doi:10.21821/2309-5180-2018-10-1-191-200

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…в многоцилиндровых двигателях с традиционными схемами коленчатых валов приводит к изменению равномерности чередования рабочих ходов и, как следствие, к изменению равномерности крутящего момента и хода. В известных работах на эту тему вопросы кинематики, динамики и виброактивности шеститактных двигателей не рассматривались, тогда как для четырехтактных двигателей, конструкция которых достаточно хорошо проработана, вопросы кинематики и динамики кривошипно-шатунного механизма и виброактивности двигателей продолжают оставаться предметом изучения и анализа [23]- [25]. В связи с этим и было предпринято данное исследование 1 , которое следует рассматривать как первичное обсуждение проблемы.…”

Section: рис 3 индикаторные диаграммы шеститактного (P гв ) и четырunclassified

Six Storke Engines: Operating Procedure and Schemes of Crankshafts

Zhukov¹,

Yamanin²,

Melnik³

2018

Vestnik GUMRF imeni admirala S. O. Makarova

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The article is devoted to the perspective direction of development of internal combustion piston enginesrealization of six-stroke working processes. The article presents an overview of possible options for the implementation of six-stroke cycles, known types of engines. The greatest interest is the six-stroke cycle with two working strokes of the piston, one of which is carried out under the pressure of the combustion products of fuel, and the second-under the pressure of steam formed as a result of water supply to the cylinder. This cycle is implemented in the Crower engine It is shown that the six-stroke cycle has a number of advantages over the four-stroke cycle: its implementation improves the economic and environmental performance of the engine, reduces the temperature level of parts, which has a positive effect on resource performance. On the basis of published indicator diagrams of six-stroke engines, diagrams of the total torques of four-cylinder engines operating on four-stroke and six-stroke cycles are constructed. It was found that the implementation of a six-stroke working cycle with additional injection of water into the cylinder leads to some deterioration of the uniformity of the alternation of the working strokes and the uniformity of the torque. The use of special schemes of crankshafts can contribute to some improvement in these indicators. Recommendations on the use of crankshafts with cross-shaped schemes in six-stroke engines are given The presented research technique can be used to select the preferred design of crankshafts for engines with different number of cylinders. Given the need for the preparation and storage of distilled water in the implementation of the six-stroke cycle, the conclusion is made about the possibility of using six-stroke engines as part of marine power plants. The necessity of further research of kinematics, dynamics and vibration activity of sixstroke engines is pointed out. Keywords: six-stroke engine, economic and environmental indicators, the order of working strokes, the uniformity of angular velocity and torque, the scheme of crankshafts.

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Section: рис 3 индикаторные диаграммы шеститактного (P гв ) и четырunclassified

Six Storke Engines: Operating Procedure and Schemes of Crankshafts

Zhukov¹,

Yamanin²,

Melnik³

2018

Vestnik GUMRF imeni admirala S. O. Makarova

Self Cite

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Dynamic and stress analysis of the main drive system in design process of an innovative fruit-vegetable washer

Bui

Gavrushin

Phung

et al. 2020

EJSI

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This paper describes a new drum-type fruit-vegetable washer, which is created on the basis of manual vegetable washing method. The main driving part of the washer is a crank mechanism with springs. The main drive design process is proposed to be carried out in two stages: dynamic research and strength analysis. The results of dynamic research show the effect of spring stiffness on reducing dynamic reactions in the crank mechanism as well as the required engine power, in other words, on reducing washer vibration and energy consumption. Stress analysis was performed using the finite element software package ABAQUS. The design process allows selecting a set of acceptable parameters for the main drive of the washer. This result is used to create a prototype of an innovative fruit-vegetable washer.

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Evaluation method for factors affecting marine diesel engine vibration caused by cylinder-piston group operation

Afanaseva

2024

Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies

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The efficiency of the use of the marine fleet is associated with a reduction in the cost of transportation, the need for which is steadily increasing. A significant share of the total transportation costs is occupied by the costs associated with the operation of ships, therefore, reducing these costs is a reserve for reducing the cost of maritime transportation. The problem of increasing the efficiency of the operation of marine vessels is closely related not only to reducing the cost of it, but also to reducing the time for maintenance and repair of ships. The existing system of scheduled preventive maintenance and repair provides for the maintenance and restoration of the normal technical condition of the vessel and its elements with a pre-planned frequency. The transfer of ships to work with extended repair periods is possible only when solving a whole range of engineering and technical measures and scientific research aimed at improving the quality of repairs, the level of technical operation, improving logistics, etc. An essential role in this is played by the use of modern methods and means to determine the technical condition of shipboard devices and mechanisms, primarily engines of shipboard power plants (SEUs), without disassembling them. High vibration loads of SEU parts lead to fatigue stresses, accelerate wear of the contacting surfaces, reducing the reliability and service life of marine diesel engines, therefore monitoring of their vibration activity is important, especially during operation. The safe operation of ships of the transport fleet largely depends on the reliability of marine diesel engines. Technical means of monitoring their operability in the process of work are currently insufficiently effective and need to be improved. It is relevant not only to develop new, more advanced and mobile hardware and software, but also to search for new scientific and methodological approaches to using the information contained in the spectrum of vibration parameters. Marine diesel internal combustion engines are complex systems that involve many variable parameters. The study of such engines requires the use of methods that can be used to systematically investigate the influence of various factors on their operation, in particular, random experimental schemes are used, since they provide systematic control over variable parameters and maximize the accuracy of estimates. The results of the application of the method of ranking the factors influencing the vibration of a marine diesel engine are presented in order to establish the most significant of them. A mathematical model is presented that allows calculating current values and predicting changes in the most significant indicators, among which the most important is the size of the gap between the piston and the cylinder sleeve.

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Force Analysis of Reciprocating Engine Using Dynamic Models of Crank Mechanism

Cited by 3 publications

References 2 publications

Six Storke Engines: Operating Procedure and Schemes of Crankshafts

Six Storke Engines: Operating Procedure and Schemes of Crankshafts

Dynamic and stress analysis of the main drive system in design process of an innovative fruit-vegetable washer

Evaluation method for factors affecting marine diesel engine vibration caused by cylinder-piston group operation

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