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Journal of Dairy Science Vol. 76 No. 8 2204-2212
© 1993 by American Dairy Science Association ®
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Milking System Dynamics. 2. Analysis of Vacuum Systems

J. Tan 1, K. A. Janni 2, and R. D. Appleman 2

1 Department of Agricultural Engineering, University of Missouri, Columbia 65211
2 Department of Agricultural Engineering and Department of Animal Science, University of Minnesota, St. Paul 55108

The system dynamics of a milking machine vacuum system were analyzed. The effects of vacuum pump capacity, reserve tank, and pipeline sizes were examined using a mathematical model and dynamic system analysis techniques. A large vacuum pump can reduce the net pressure momentum change caused by low frequency accidental air leaks but has little effect on periodic variations. System internal volume has the opposite effect. A large internal volume can reduce periodic variations but has little effect on net pressure momentum change caused by low frequency air leaks. Air pipelines should be sized for dynamic performance and vacuum drop minimization.

Key Words: milking equipment • vacuum • dynamic analysis

Submitted on January 30, 1992
Accepted on February 11, 1993




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M. Chassagne, J. Barnouin, and M. Le Guenic
Expert Assessment Study of Milking and Hygiene Practices Characterizing Very Low Somatic Cell Score Herds in France
J Dairy Sci, May 1, 2005; 88(5): 1909 - 1916.
[Abstract] [Full Text] [PDF]


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Copyright © 1993 by the American Dairy Science Association ®.