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 1
Topic:
Agricultural Engineering
ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Skalska D. , Szlachta J. , Nejman M. 2005. VACUUM STABILITY IN A MILK LINE OF A TUBE MILKING MACHINE OF VARIABLE LOADING, EJPAU 8(1), #12.
Available Online: http://www.ejpau.media.pl/volume8/issue1/abs-12.html

VACUUM STABILITY IN A MILK LINE OF A TUBE MILKING MACHINE OF VARIABLE LOADING

Danuta Skalska, Józef Szlachta, Mariusz Nejman
Institute of Agricultural Engineering, Agricultural University of Wroc³aw, Poland

 

ABSTRACT



The study analyzed changes of vacuum and the range of vacuum amplitude in a milk line of a tube milking unit. Two manners of connecting six milking machines to the installation of the milking machine were used. Milking machines were connected successively, beginning with the first stand tap lying the closest to the final unit, and then beginning with the sixth stand tap found the furthest in relation to the final unit for two configurations of the milk line (arm and arm with the wash supporting line) and for three systems of vacuum regulation. The studies showed a significant influence of the total liquid stream from the milking machines Qmr, the mean velocity of the flowing liquid vc¶r and a configuration of the milk line on the drop and range of vacuum amplitude aP14 in the transport zone of the milk line. The decrease of vacuum in the transport zone for the configuration of the milk line - arm, with full loading of the installation was 5 kPa, and the range of its amplitude was about 8 kPa. For the configuration of the milk line arm with a wash supporting line the drop of vacuum was 2 kPa, and its range of amplitude - about 6 kPa. In the section of the milk line with the working cluster, drops of vacuum were significantly dependent on the quantity of the flowing liquid Qmr and on the appearing "thresholds of liquid" at the stand taps. The range of vacuum amplitude aP14 in the milk line in the section with the working cluster changed from 1 to 9 kPa.

Key words: tube milking machine, configuration of the milk transfer line, drop of mean vacuum, range of vacuum amplitude.

Danuta Skalska
Institute of Agricultural Engineering,
Agricultural University of Wroc³aw, Poland
37/41 Che³monskiego Street; 51-630 Wroc³aw, Poland
phone: (+48 71) 32 05 731
fax: (+48 71) 348 24 86
email: skalska@imr.ar.wroc.pl

Józef Szlachta
Institute of Agricultural Engineering,
Agricultural University of Wroc³aw, Poland
37/41 Che³monskiego Street; 51-630 Wroc³aw, Poland
phone: (+48 71) 32 05 731
fax: (+48 71) 348 24 86
email: szlachta@imr.ar.wroc.pl

Mariusz Nejman
Institute of Agricultural Engineering,
Agricultural University of Wroc³aw, Poland
37/41 Che³monskiego Street; 51-630 Wroc³aw, Poland
phone: (+48 71) 32 05 731
fax: (+48 71) 348 24 86
email: nejman@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.

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