Acta Univ. Agric. Silvic. Mendelianae Brun. 2016, 64, 775-779

https://doi.org/10.11118/actaun201664030775
Published online 2016-07-04

Vacuum Fluctuation in a 2×3 Tandem Milking Plant in Dependence on the Vacuum Control Method

Jiří Fryč1, Josef Los1, Radovan Kukla1, Tomáš Lošák2, Kristina Somerlíková3ID

1Department of Agricultural, Food and Environmental Engineering, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic
2Department of Environmentalistics and Natural Resources Faculty of Regional Development and International Studies, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic
3Department of Applied Statistics and Demography, Faculty of Regional Development and International Studies, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

Vacuum fluctuation was measured using three different vacuum control methods. Firstly, the use was made of a control valve delivered by the manufacturer; then, an additionally installed frequency converter was used. Lastly, a frequency converter fitted with the stabilisation device prototype was used. First, the control sensitivity according to ISO was measured in all three alternatives. Then the vacuum fluctuation during milking was measured. To conduct the measurements under objectively identified conditions, another measurement was conducted with the air feed during milking being replaced with a precisely defined variable flow rate. The conducted measurement confirmed the fact that when the frequency converter is used, the vacuum fluctuation in the stabilised condition is at the same level as when the control valve is used. If there are sudden changes in the flow rate and the frequency converter is used, the vacuum fluctuation increases. The proposed stabilisation device prototype can reduce the fluctuation.

Funding

This study was financed by the Internal Grant Agency of the Faculty of Agronomy MENDELU in Brno No. TP 11/2013.

References

12 live references