MECHANICAL VIBRATOR Russian patent published in 2012 - IPC B07B1/42 B06B1/16 

FIELD: process engineering.

SUBSTANCE: proposed vibrator is used with vibration screens or other appliances exploiting linear, circular or elliptic motions for screening, classifying, transfer, etc. Proposed vibrator comprises bearing housing attached to device sidewall to house two bearings fitted in symmetry with central line (CL), shaft running in said bearings and having inner extension and outer extension extending beyond said housing. First and second counterweight are fitted on aforesaid shaft inner and outer extensions. Said counterweight have first and second different eccentric masses M1, M2, first and second radial overhangs R1, R2, first and second distances L1, L2 from housing CL. Aforesaid bearing housings feature the sixes that said counterweights create equal loads on bearings and equalised bending moments on the device sidewall. Third counterweight is secured to second counterweight to be selectively detached therefrom and has third eccentric mass M3 supported level with housing CL to allow appropriate change of total eccentric mass of vibrator (V) without varying equilibrium of load distribution on bearings.

EFFECT: higher efficiency of vibration, equalised distribution of loads, no bending moment.

12 cl, 5 dwg