| 摘要 |
FIELD: measuring technique. ^ SUBSTANCE: method can be used for measuring speed of phase transitions in movable structures provided with balance rings of domestic washers provided with dismounted top desk. Weight with mass of 0,5 kg is suspended inside drum of washer at height corresponding to center of gravity of internal movable part. Auto-balancing device is subject to cooling to temperature below 0°C to let solution inside hollow soldered metal balls freeze. Drum during process of cold air to come, inside for making solution freeze, is periodically driven into rotation and then it is stopped. Critical non-balanced mass of mechanical system is measured any time due to suspending additional weights and determining that masses of them, with which the drum touches wall of case. Speed of phase transitions is measured when solution gets frozen inside balls. Then test are conducted to study process of solution melting by using more perforated metal balls, for which purpose the balls are preliminary filled with ice or snow on base on high density solutions. To defrost solution, air compressor is turned on to pump warm air up inside cavity under drum. Drum is periodically driven into rotation and stopped during process of warm air intake. Critical un-balanced mass of mechanical system is measured any time by suspending additional weights to determine that mass of weights, at which mass the drum touches wall of case at rotation. Speed of phase transition in "solid body-liquid" system is measured during defrosting of solution. ^ EFFECT: improved precision of measurement. ^ 8 dwg, 1 tbl |
