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Поиск атрибутный
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THE EXPERIMENTAL ANALYSIS OF BRACKING CHARACTERS FOR THE MACHINES OF THE ROTATION TYPE
Аннотация
The drum machines of the centrifugal type are used in many fields. The
application of the centrifugal forces are effective in machine-building (rotation
systems), in space technology (stabilization of rotation apparatus, liquid
gyroscopus), in chemical industry (separation of inhomogeneous substances, for
example raw oil), in food technology (production of sugar) and so on. Mode of
life (washing) machines are based on same principles too. The design parameters
of the centrifugal machines are determined, as a rule, by means of experiments
because of the mathematical modelling does not describe the main regularities
of the complicated hydrodynamic processes as well as the theory does not give
universal methods of the calculation. In particular, we consider the washing
machine when the drum has a great angular velocity from the motor during the
squeezing regime. Then the dampfing airdynamic moment is more then the
braking moment of the drum support. The airdynamic forces arise in view of
curls nearby the walls of the drum. In order to determine the experimental
function of airdynamic dampfing moment with respect to angular velocity we
analyze the braking rotor. The dependence of the angular velocity on the time is
fixed by means of measurement instrument with the computer. The
experimental date are processed by the method of the regression analysis. It is
shown that the main contribution of the bracking action is carried out by the
airdynamic dampfing moment which is proportional to the angular velocity. The
simple mathematical model is offered. The adequate accuracy is studied in
detail.
Ключевые слова
rotating systems, viscous fluid, drum machines
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