RESONANCE TYPE VIBRATING SCREEN Russian patent published in 2006 - IPC B07B1/40 B07B1/42 

FIELD: apparatuses for cleaning drilling mud, possibly at building oil and gas wells.

SUBSTANCE: resonance type vibrating screen includes housing, frame mounted with use of shock absorbers and provided with vibrator; secured to frame screen webs; devices for changing frame inclination angle; supplying chute. Vibrator is mounted on beam secured at both sides to lateral sides of frame. Elastic members of the same length are secured to beam symmetrically relative to beam axis. Said members are in the form of plates or rods and they have on their ends weights of the same mass. Total rigidity C of elastic members and total mass m of weights are selected with use of mathematical expression. Said elastic members are secured to beam in such a way that directions of resonance oscillations of weights coincide with direction of oscillations excited by means of means of vibrator. Weights or parts for securing weights to elastic members are made with possibility of securing additional regulating weights. Vibrator is connected with power supply source through control device that may change angular frequency of oscillations excited by means of vibrator. Oscillation pickup is mounted in frame and it is connected with control device that may operate in mode for manual adjustment of frame oscillations and in mode for automatic sustaining preset oscillations of frame.

EFFECT: increased vibration acceleration of frame without increasing vibrator power, possibilities for manual adjustment of frame oscillations directly at operation of vibrating screen and for automatic sustaining of preset oscillations of frame.

2 dwg, 3 ex