METHOD TO CONTROL VIBROSIEVE DRIVE SYSTEM Russian patent published in 2010 - IPC B07B1/42 E21B21/06 

FIELD: process engineering.

SUBSTANCE: invention relates to oil-and-gas industry and can be used to control drive system of vibrosieves with elliptical trajectory of frame oscillations, the frame being made up of two unbalanced exciters. Proposed method comprises varying phase shift between misbalance turn angles be affecting unbalanced exciter motors. Revolution cycle of first unbalanced exciter and time interval wherein exciters pass identical positions are constantly measured. Then phase shift between turn angle is calculated by mathematical relation. Thereafter, difference between obtained value and vibrosieves design rating is determined to vary acting voltage fed to one of motors of exciters so that said difference reduces to zero. If sign of obtained difference corresponds to that of rotation of the first exciter, then voltage fed to its motor is reduced. If sings do not match, voltage fed to motor of the second exciter is reduced. Further, control is performed by varying fed voltage to motors. If changed voltage reaches main voltage, then another motor actual voltage is decreased.

EFFECT: higher efficiency and capacity.

7 dwg