EJPAU 2005. Pawlak T. , Szlachta J. , Luberański A. THE ANALYSIS OF THE EFFECT OF CHANGING THE VOLUME OF THE UNDER-TEAT CHAMBER, RUBBER ELASTICITY AND PULSATION TYPE ON THE SIZE OF THE RETURN FLOW IN A SHORT MILK TUBE

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2005
Volume 8
Issue 4

Topic:

Agricultural Engineering

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Pawlak T. , Szlachta J. , Luberański A. 2005. THE ANALYSIS OF THE EFFECT OF CHANGING THE VOLUME OF THE UNDER-TEAT CHAMBER, RUBBER ELASTICITY AND PULSATION TYPE ON THE SIZE OF THE RETURN FLOW IN A SHORT MILK TUBE, EJPAU 8(4), #42.
Available Online: http://www.ejpau.media.pl/volume8/issue4/abs-42.html

THE ANALYSIS OF THE EFFECT OF CHANGING THE VOLUME OF THE UNDER-TEAT CHAMBER, RUBBER ELASTICITY AND PULSATION TYPE ON THE SIZE OF THE RETURN FLOW IN A SHORT MILK TUBE

Tomasz Pawlak, Józef Szlachta, Adam Luberański
Institute of Agricultural Engineering, Agricultural University of Wrocław, Poland

ABSTRACT

The purpose of the paper was to show the effect of changing the volume of the chamber under the teat and the elasticity of the teat rubber on the intensity of the return flow in a short milk tube. The studies analyzed the return flow with the use of simultaneous and alternate pulsation. Three levels of working sub-pressure were applied (50, 46, 42 kPa), four sizes of teat penetration (100, 75, 62 and 50 mm) as well as four types of teat rubber. The measurements were made in a laboratory with the simulation of the flow stream of the milk-replacing liquid 2, 4, 6 and 8 kg·min^-1. A mathematical formula was worked out on the basis of the results of studies to describe the return flow for alternate and simultaneous pulsation at a satisfactory value of determination coefficient R² of over 0.6.

Key words: simultaneous pulsation, alternate pulsation, return flow.

Tomasz Pawlak
Institute of Agricultural Engineering,
Agricultural University of Wrocław, Poland
37/41 Chełmonskiego Street; 51-630 Wrocław, Poland
phone: (+48 71) 32 05 715
fax: (+48 71) 348 24 86
email: pawlak@imr.ar.wroc.pl

Józef Szlachta
Institute of Agricultural Engineering,
Agricultural University of Wrocław, Poland
37/41 Chełmonskiego Street; 51-630 Wrocław, Poland
phone: (+48 71) 32 05 731
fax: (+48 71) 348 24 86
email: szlachta@imr.ar.wroc.pl

Adam Luberański
Institute of Agricultural Engineering,
Agricultural University of Wrocław, Poland
37/41 Chełmonskiego Street; 51-630 Wrocław, Poland
phone: (+48 71) 32 05 735
fax: (+48 71) 348 24 86
email: luberanski@imr.ar.wroc.pl

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.