scholarly journals Comparative study of a milking unit pulsation system in laboratory and field conditions

2021 ◽  
Vol 13 (3) ◽  
pp. 285-287
Author(s):  
G. Dineva
Keyword(s):  
Comparative Study ◽  
Field Conditions ◽  
Engineering Faculty ◽  
Agricultural Engineering ◽  
Machine Milking ◽  
Lactating Cows ◽  
Pulsation Rate ◽  
Pipe Line ◽  
Milking Machine

Abstract. A comparative study of the pulsation phases in classic milking units was performed. The testing of the same is done in laboratory and field conditions (during milking). The pulsation settings at which the test was performed were pulsation rate 60 min-1 and 90 min-1, ratio 50/50% and vacuum mode 50 kPa. The experiments were performed in the laboratory of “Machine milking” (Department of Agricultural Engineering, Faculty of Agriculture, Trakia University) on a milking installation with a pipe line and on a farm for 60 lactating cows at the same milking installation. It was found that the transients (phases “a” and “c”) are significantly reduced during milking. Respectively, the actual phases (phases “b” and “d”) are significantly increased during the milking process. The conclusions are related to the settings and timely diagnostics of the milking machine.

Udder characteristics and effects of pulsation rate on milking machine efficiency in donkeys

2014 ◽  
Vol 82 (1) ◽  
pp. 121-128 ◽  
Author(s):  
Angela Gabriella D‘Alessandro ◽  
Michele Mariano ◽  
Giovanni Martemucci
Keyword(s):  
Mammary Gland ◽  
Milk Yield ◽  
Somatic Cell Count ◽  
Milk Composition ◽  
Machine Milking ◽  
The Third ◽  
Pulsation Rate ◽  
Direct Measurements ◽  
Internal Structures ◽  
Milking Machine

Very little is known about the udder characteristics, partitioning of milk in the mammary gland and efficiency of machine milking in donkeys. This study aimed to evaluate the characteristics of the udder and teats, milk yield in relation to pulsation rates (90, 120 and 150 cycles/min), milk partitioning in the mammary gland, composition of the spontaneously removed and residual milk fractions and milking efficiency. Forty-one healthy Martina Franca jennies in the third month of lactation and routinely milked twice daily were used in three studies. Udder characteristics were evaluated by direct measurements and ultrasonographic scanning. Residual milk was obtained by milking after an oxytocin administration (40 IU i.m.). The prevalent shapes were ‘bowl’ for udders and ‘conical’ for teats. After milking the udder characteristics decreased within a range from −11·6% (udder depth) to −25·7% (diameter of teat at the base). The internal structures of the udder resulted as several pockets of ducts empting directly into the teat. The pulsation rate of 120 cycles/min improved (P<0·05) the milk yield in comparison to the 90 and 150 cycles/min, reduced the residual milk fraction, thus improved (P<0·05) milking efficiency. Residual milk composition had higher (P<0·05) fat content and somatic cell count than the spontaneously removed milk fraction. The udders revealed several pockets of ducts empting into the teat instead of a single cisternal cavity and showed a certain compliance. The use of 120 cycles/min pulsation rate improved milking efficiency.

Method of high frequency therapy at cows' mastitis during machine milking

2020 ◽  
pp. 9-12
Author(s):  
Viktor E. Lyubimov ◽  
Keyword(s):  
Dairy Cows ◽  
Electromagnetic Fields ◽  
High Frequency ◽  
High Efficiency ◽  
Environmentally Friendly ◽  
Ultrahigh Frequency ◽  
Machine Milking ◽  
High Frequency Electromagnetic Field ◽  
Milking Machine ◽  
Methods Of Treatment

Health of dairy cows ensures human health, so it is important that dairy products do not contain antibiotics that are used to treat any inflammation, including mastitis. In Russia at present, the problem of mastitis in cows exists with both attached and loose housing of cows. Mastitis of dairy cows are the great problem in milking husbandry. Losses from mastitis in milk yield can reach 15-20%. The main reasons for the occurrence of nonspecific mastitis of cows are the shortcomings of the working components of the milking machine: the degree of deterioration of the nipple rubber and the violation of machine milking technology (the reduction in pre-milking time and vacuum fluctuations account for 70% of all causes). Treatment of mastitis with antibiotics is effective, but not environmentally friendly and unacceptable. For the treatment of inflammation of the udder, it is necessary to use more environmentally friendly methods of treatment, one of which is the exposure to ultra-high frequency electromagnetic field tested by medicine. Use of three types of medical-mobile milking machines with the same method of exposure to ultrahigh-frequency electromagnetic fields on cow's nipples through electrodes in milking cups: LPDA-1-UHF, LPDA-2-UHF and LPDA-UHF-30 M, is described in the article. Author proved that cows with subclinical forms of mastitis recovered faster during milking with exposure to the ultrahigh frequency than when treated by antibiotics, and milking with the ultrahigh frequency device helps to recover 82% of the affected quarters with clinical forms and 100% of cows with subclinical forms of mastitis or with udder irritation. The high efficiency of the method of exposure to electromagnetic fields of the ultrahigh frequency during machine milking by means of medical-mobile milking machines LPDA-UHF for the prevention and treatment of mastitis of cows was shown.

Method and results of experimental researches of modes of work of the adaptive milking equipment on the basis of the portion meter of the weight type

2020 ◽  
pp. 140-146
Author(s):  
I. A. Afanasiev ◽  
V. V. Tkach
Keyword(s):  
Regression Analysis ◽  
Vacuum Pressure ◽  
Limit Values ◽  
Operating Modes ◽  
Machine Milking ◽  
Milk Output ◽  
Mode Of Operation ◽  
Milking Machine ◽  
Experimental Researches

Annotation Purpose. Improving the efficiency of machine milking due to the improvement of milking equipment on the basis of the portion meter of the weight type. Methods. Studies have been conducted on the basis of the planned experiment. The data obtained were processed using the methods of regression analysis. Results. The technique of laboratory researches is developed, a prototype of a membrane regulator of vacuum is made and experimental researches of operating modes of the adaptive milking equipment on the basis of the portion meter of the weight type. According to the results of the research, the dependence between the parameters and the mode of operation of the membrane vacuum regulator was obtained. Conclusions. The dependence is obtained, between the vacuum pressure in the milk collection chamber of the collector, milk expense, the diameters of the milk pipe and the diameters of a throttle opening. The limit values of the intensity of milk output (0.2 m3/s) at which there is a critical drop in the working vacuum pressure in the milk collection chamber of the collector and the corresponding choke parameters (diameter of the throttle opening 0,001 m) are defined. This eliminates this negative phenomenon. Keywords: adaptive milking equipment, milking machine, machine milking, milk expense.

703. Cineradiographic observations on machine milking

1958 ◽  
Vol 25 (2) ◽  
pp. 154-158 ◽  
Author(s):  
G. M. Ardran ◽  
F. H. Kemp ◽  
P. A. Clough ◽  
F. H. Dodd
Keyword(s):  
Rate Ratio ◽  
Machine Milking ◽  
Pulsation Rate

Machine milking has been studied in three cows by cineradiography at 50 frames/sec. The findings of Pier et al.(5) have been confirmed.The effects of variation in the pulsation rate, ratio and liner tension were investigated and the results compared with those obtained by other methods. The proportion of each milking cycle during which milk flows has been determined.

scholarly journals Report on the 44th International Symposium: Actual Tasks on Agricultural Engineering, 23rd-26th February 2016, Opatija, Croatia

2016 ◽  
Vol 47 (1) ◽  
pp. 59 ◽  
Author(s):  
Igor Kovačev ◽  
Daniele De Wrachien
Keyword(s):  
International Symposium ◽  
Systems Engineering ◽  
Agricultural Machinery ◽  
Engineering Faculty ◽  
Agricultural Engineering ◽  
Engineering Society ◽  
Engineering Department ◽  
Department Faculty ◽  
Grand Hotel

The 44<sup>th</sup> International Symposium <em>Actual Tasks on Agricultural Engineering</em> was held on 23<sup>rd</sup>-26<sup>th</sup> February 2016 in Grand Hotel <em>Adriatic</em> Opatija, Republic of Croatia. The principle Organiser, Agricultural Engineering Department, Faculty of Agriculture, University of Zagreb was supported by the following frameworks: Department of Agricultural Engineering, Faculty of Agriculture, University J.J. Strossmayer, Osijek, Department of Bio-systems Engineering, Faculty of Agriculture and Lifesciences, University of Maribor (Slovenia), Agricultural Institute of Slovenia, National institute for agricultural machinery - INMA Bucharest (Romania) and Croatian Agricultural Engineering Society. In addition, CIGR, EurAgEng and AAAE bestowed their support and endorsement on the Event.

441. Equipment for individual-quarter machine milking

1951 ◽  
Vol 18 (2) ◽  
pp. 151-154 ◽  
Author(s):  
H. S. Hall
Keyword(s):  
Dairy Cow ◽  
Machine Design ◽  
Machine Milking ◽  
Milking Machine

Individual-quarter machine milking is an important technique in the study of mastitis, dairy-cow management and milking-machine design. In the course of such work equipment for this purpose was found necessary and suitable designs had to be produced.

532. The relationship between mastitis and the method of stripping after machine milking

1954 ◽  
Vol 21 (1) ◽  
pp. 10-18 ◽  
Author(s):  
F. K. Neave ◽  
T. M. Higgs ◽  
D. Simpkin ◽  
J. Oliver ◽  
F. H. Dodd
Keyword(s):  
Total Yield ◽  
Udder Health ◽  
Machine Milking ◽  
Milking Machine ◽  
The Relationship ◽  
Partial Vacuum

At the end of normal machine milking some milk, which cannot be removed unaided even by the most efficient milking machine, remains in the udder sinus. This milk, often some 10% of the total yield depending upon the age of the cow, udder shape, partial vacuum of the milking machine and teat-cup liner design, was formerly most frequently removed by hand. As a result of advice and encouragement farmers are rapidly changing to manipulation of the teat-cups, known as machine stripping. This practice has renewed interestin the old controversy about the effect of the method of stripping on udder health.

TECHNICAL SOLUTIONS FOR INCREASING OF MACHINE MILKING COWS EFFICIENCY

2016 ◽  
Vol 11 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Лукманов ◽  
Ruslan Lukmanov ◽  
Мустафин ◽  
Anas Mustafin ◽  
Зиганшин ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Technological Parameters ◽  
Machine Milking ◽  
Operation Modes ◽  
Milking Machine ◽  
Technical Solutions

A device of disconnection a milking machine at the end of milking was created to improve the efficiency of machine milking cows. On the basis of theoretical and experimental studies we proved constructive and technological parameters and operation modes of the air engine.

A Comparative Study of Anti-locust Baits, with special Reference to Base Materials

1953 ◽  
Vol 44 (4) ◽  
pp. 693-702 ◽  
Author(s):  
H. B. N. Hynes
Keyword(s):  
Comparative Study ◽  
Special Reference ◽  
Field Conditions ◽  
Desert Locust ◽  
Reliable Technique ◽  
Base Materials

A simple, but reliable, technique is described for the study of the acceptability to locust hoppers of poison baits under field conditions.This was applied to the study of a number of vegetable materials which might be used for the manufacture of wet baits to destroy hoppers of the Desert Locust.The materials tested could be divided into five classes of acceptability, and consideration of these indicated that heavy lignification detracted from acceptability while the presence of starch added to it.It was shown that molasses adds to the acceptability of only the least acceptable materials unless very large amounts are used.Simple tests showed that acceptability was not correlated with water-absorbing properties, that the rate of drying of bait was dependent on the amount of water initially absorbed, and that molasses influences the rate of drying only when large amounts are added.

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