Browsing by Subject "Slider-crank mechanism"

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A fourier method of determining the speed fluctuation coefficient of a general slideer-crank mechanism

Uziak, J.; Foster, J.D.G. (University of Botswana, Faculty of Engineering and Technology, http://ajol.info/index.php/bjt, October NaN, 2001)

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Abstract:

In this paper a method is presented which enables the solution of the equation of motion of the slider-crank mechanism. Expansion of functions into Fourier series is used in this method, whereby the solution of the equation of motion is also obtained in the form of Fourier series. This method enables also the determination of the coefficient of speed fluctuation of the slider-crank mechanism. The method creates the basis for an analysis of the influence of various factors, e.g. the working conditions or the construction parameters of the system, on the coefficient of speed fluctuation.

URI:

http://hdl.handle.net/10311/665

Files in this item: 1

Uziak_BJT_2001.pdf (2.257Mb)

A fourier method of determining the speed fluctuation coefficient of a general slider-crank mechanism

Uziak, J.; Foster, J.D.G. (University of Botswana, NaN, 2001)

[more]

[less]

Abstract:

In this paper a method is presented which enables the solution of the equation of motion of the slider-crank mechanism. Expansion of functions into Fourier series is used in this method, whereby the solution of the equation is also Fourier series. This method enables also the determination of the coefficient of speed fluctuation of the slider-crank mechanism. The methods create the basis for an analysis of the influence of various factors, e.g. the working conditions or the construction parameters of the system, on the coefficient of speed fluctuation.

URI:

http://hdl.handle.net/10311/702

Files in this item: 1

Uziak_BJT_2001.pdf (999.6Kb)

Performance evaluation of commonly used oil ram press machines

Uziak, J.; Loukanov, I. A. (CIGR Journal http://www.cigrjournal.org/, NaN, 2007)

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Abstract:

The ram-press technology for oil expression has received a lot of attention in many African countries during the last two decades. The technology is based on manually operated mechanical presses, which employ a slider-crank mechanism in two different configurations. The original machine was invented by Karl Bielenberg in 1985 and since then continuous design improvements have been made to improve their performance and ease of operation. This paper deals with the performance of some commonly used ram press machines such as BP-35, BP-30 and FI-32, in order to establish their suitability for small rural oil expression technology. The available oil-seed processing techniques were discussed, including their suitability for locally grown sunflower varieties, and the characteristics of the ram press machines. The machines were tested by using three varieties of sunflower seeds, namely PNR 7225, PNR 7369, and Peredovik. The machines were compared by their outputs obtained when conducting a high production and high expression tests. Based on the above analysis the Camartec design (BP-30) was found to have the best performance. The machine had the highest efficiency and also the highest expression rate in comparison to CAPU design (BP-35) and RAM design (FI-32) machines. The FI-32 machine was found to be ineffective, having in the high expression test an expression rate below 20% irrespective of the type of seeds used. In terms of the speed of oil production the CAPU (BP-35) design performed better then the other machines. However in the high production test its performance was similar to that of Camartec machine.

URI:

http://hdl.handle.net/10311/697

Files in this item: 1

Uziak_AEI2_2007.pdf (989.2Kb)

Theoritical analysis of an offset single-stroke ram press for sunflower oil extraction

Loukanov, I. A.; Uziak, J. (International Symposium on Theory of Machines and Mechanisms (IFToMM), NaN, 2001)

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Abstract:

The single-stroke ram press machine is widely used for sunflower oil extraction in African countries. It is manually operated, low speed machine constructed on the basis of slider-crank mechanism. The paper presents a detailed theoritical analysis of the mechanism of the linkage system. The analysis is done for different positions of the driving lever (handle) nad other parameters, which influence the performance of the machine. Based on that analysis conclusions on the optimal performance of the mechanism are drawn.

URI:

http://hdl.handle.net/10311/667

Files in this item: 1

Loukanov_IFToMM_2001.pdf (993.1Kb)

Now showing items 1-4 of 4

Browsing by Subject "Slider-crank mechanism"

Browsing by Subject "Slider-crank mechanism"

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