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

FIELD: apparatuses for cleaning 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; apparatus for changing inclination angle of frame; feeding chute. Vibrator is mounted on beam secured at both sides to lateral sides of frame. Elastic members of the same length in the form of plates or rods are secured to beam symmetrically relative to beam axis. Weights of the same mass are secured to ends of elastic members. Total rigidity C of elastic members and total mass m of weights are selected with use of mathematical expression. 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 vibrator. Weights or parts for mounting weights on elastic members are made with possibility of securing to them additional adjusting weights. Vibrator is connected with power supply system through control device that may change angular frequency of oscillations excited by means of vibrator.

EFFECT: increased vibration acceleration of frame of vibrating screen without increase of vibrator power, possibility for regulating vibration acceleration of frame directly during operation of vibrating screen.

2 dwg, 2 ex