Installation of equilibrium pressure of milking machine vacuum system

Medvedskyi, Oleksandr; Kukharets, S.; Golub, Gennadii; Dmytriv, Vasyl

doi:10.22616/erdev2018.17.n173

Cited by 5 publications

(4 citation statements)

References 6 publications

(10 reference statements)

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“…Taking into account that the force is determined as a result of multiplication of pressure by the area of action of this pressure (Medvedskyi et al, 2018;Penry et al, 2018), the equation ( 1) is as follows:…”

Section: Resultsmentioning

confidence: 99%

Simulation of Design Parameters of a Milking Cup with An Extended Service Life

Čėsna

Medvedskyi

Postol

et al. 2022

Agricultural Engineering

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Modern milking machines need some additional studies to meet the requirements as to milking equipment. An imperfect design of a teatcup results in an incomplete milking of cows. The availability of devices for milk flow stimulation promotes an increase in a cow milk yielding capacity. But here arises a problem of an un-controlled axial motion of a teatcup on a teat. As a result, a full milkflow is reduced, particularly at the final stages of milking. There is an effect of an increase in an inner diameter of a liner barrel, which causes that teatcups fall down. A scientific problem of the mitigation of some negative developments with the view to improve the efficiency of a teatcup arises. In a teatcup shell a liner is in a detended position during milking and resting periods. Thus, it under constant stretching. It results in a loss of elasticity irrespective of the material, as well as in reduction ofthe period of service maintenance. The use of a device for supporting a liner which is in a stretched state only during the milkflow, will result in an increase of a teatcup efficiency. The suggested automatic pneumatic mechanism releases a liner from the load during the resting period. The dependence of a tension force of a liner from the surface area of an annular membrane has been established. It has been proven that the membrane surface of 0.00065 m2 provides tension for a mechanism performance irrespective of operating vacuum pressure. The regression equation which connects geometrical parameters of an operating system with the efforts directed at the opening of a leading membrane has been received. A suitability of operation of using a pneumatic tightening device has been substantiated. An insignificant axial motion of a liner during a cycle of milking creates a stimulating effect. As a result, a completeness of miliking increases by 3-8%.

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Section: Resultsmentioning

confidence: 99%

Simulation of Design Parameters of a Milking Cup with An Extended Service Life

Čėsna

Medvedskyi

Postol

et al. 2022

Agricultural Engineering

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“…Optimum size of a vacuum tank and of a milk bucket, under which pressure fluctuations are minimal, has been recommended by the researchers [9]. Herewith, the researchers point out the reduction of duration of the working pressure setting under the condition of increasing the vacuum system admittance, as well as of analogical vacuum pump capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Herewith, the researchers point out the reduction of duration of the working pressure setting under the condition of increasing the vacuum system admittance, as well as of analogical vacuum pump capacity. These demands ensure a higher level of constant vacuum pressure [9]. But the studies, as to the effects of the techniques of connecting components into one construction on the effectiveness of a vacuum system, have not been conducted.…”

Section: Introductionmentioning

confidence: 99%

Simulation of small-size milking machine vacuum system

Medvedskyi¹,

Kukharets²,

Čėsna

et al. 2021

20th International Scientific Conference Engineering for Rural Development Proceedings

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Small-size milking machines of well known firms differ in the parameters of a vacuum system. Different schemes and techniques are used to connect the vacuum system components into one construction. It affects the variability of the performance figures of the equipment operation. It appears to be difficult to determine the generalized parameters of a vacuum system. Various components of a construction scheme of a vacuum system cause different loss levels of the vacuum pressure. Significant pressure losses in a vacuum system reduce the energetic effectiveness of a milking machine. The researchers have not sufficiently studied the problem of a vacuum system simulation with minimal vacuum pressure losses. A need arises to substantiate the rational construction of a vacuum system of a small-size milking machine. For this purpose, it is necessary to study the schemes of connecting a vacuum pump, a vacuum tank, air lines and a milk bucket into an overall design. The connection of the matched as to the geometric parameters components results in reducing the pressure losses in the vacuum system. The reducing of pressure losses in the vacuum system makes it possible to increase the level of vacuum pressure in the milk bucket. Herewith, the vacuum pump capacity is not changed. The investigation proves that it is expedient to attach the air pipeline under minimum angle to the cylinder of the vacuum tank. It makes it possible to reduce the vacuum pressure losses by 10-45%. It has been established that pressure losses reduce due to the increase in the size of an opening, when the set angle of the air pipeline connected to the vacuum tank decreases. The investigation establishes the increase in pressure losses by 8-11% for the air line with an optimal bending radius. A mathematical model of determining pressure at the inlet of the main air pipeline of the vacuum pump has been received. A rational scheme of the vacuum system of a small-size milking machine has been substantiated.

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“…Among these studies, investigations of vacuum changes in the milking system have a special place (Achkevych O. et al, 2020;Medvedskyi O., 2018), and this is the main technical parameter of the milking machine. The vacuum loss and fluctuations in the milking machine reduce the efficiency of milking and are factors that affect the health of the udder of cows.…”

Section: Introductionmentioning

confidence: 99%

The Functional Controlability of Milk Ejection of the Adaptive Milking System

Dmytriv

2021

INMATEH

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The concept of functional controllability of the milk ejection is considered, which makes it possible to predict the intensity of milk ejection in the online mode of the milking machine. The architecture of the functional controllability by intensity of milk ejection is developed. Input and output parameters of the structural-functional scheme of adaptive control of milk ejection intensity are described. An analytical model of milk ejection intensity based on Pearson's distribution is developed. The milk ejection intensity for different productivity and duration of cows milking is modelled. The microprocessor unit is designed using a single-chip microcontroller. It ensures the algorithm set by the central computer and implements a step of changing the pulsation frequency of 0.1 Hz, the ratio between the cycles of 0.25%, the phase shift step of 0.1 s.

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Installation of equilibrium pressure of milking machine vacuum system

Cited by 5 publications

References 6 publications

Simulation of Design Parameters of a Milking Cup with An Extended Service Life

Simulation of Design Parameters of a Milking Cup with An Extended Service Life

Simulation of small-size milking machine vacuum system

The Functional Controlability of Milk Ejection of the Adaptive Milking System

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