SCREEN SHAKER Russian patent published in 2006 - IPC B07B1/40 B07B1/42 

FIELD: petroleum industry; natural gas industry; production of devices for drilling mud fluid cleaning.

SUBSTANCE: the invention is pertaining to the field of petroleum industry and natural gas industry, in particular, to production of devices for drilling mud fluid cleaning. The screen shaker consists of: a base; a frame mounted with the help of dampers; screen plates fixed on the frame; a device of changing a tilt angle of the frame; a feeding chute; a vibration exciter mounted on the beam fixed to the frame. The beam is made in the form of a resilient construction, the stiffness of which together with the stiffness of the dampers in a direction of a vector of the vibrations of the frame and the mass of the frame are defined by the ratio: C + Ca·n/M = ω² , where C is stiffness of the beam in respect to the frame, in H/m; Ca is stiffness of one damper, in H/m; n is a quantity of dampers, in pieces; M is the mass of the frame, in kg; ω is a resonance angular frequency of the frame vibrations, in radians/s. The beam is connected to the frame in its lower part by means of the vertical poles having a heightened stiffness in the direction of the vector of vibrations of the frame and made with a capability of being deformed in a horizontal direction together with the ends of the beam. At that the vibration exciter is connected to the mains supply through a frequency converter made with a capability of the electric current frequency change. The technical result of the invention is an increased vibration acceleration of the frame with a capability of its adjustment directly during the resonance screen shaker operation.

EFFECT: the invention ensures an increased vibration acceleration of the frame with a capability of its adjustment directly during the resonance screen shaker operation.

2 dwg, 2 ex