ROAD ROLLER PERFORMING COMBINED ACTION Russian patent published in 2004 - IPC

FIELD: equipment for layer-by-layer compacting of road bituminous concrete base and covering. SUBSTANCE: road roller has frame onto which power installation is mounted, leading and trailing rollers. Vibratory plate with directional operation vibro-exciter and control mechanism for regulating direction of disturbing action in dependence of compactable mixture type is connected with road roller frame through drag frame. Hydraulic cylinders are used for lifting and lowering vibratory plate. Vibro-exciter drive motor is secured by bracket to mounting plate. During roller operation vibratory plate is mounted on compactable material surface and hydraulic cylinders provide necessary static pressure of 0.01 - 0.03 MPa. Vibro-exciter is actuated in the beginning of roller motion. Angle of disturbing action application α (angle between working surface of vibratory plate and disturbing action direction) is set before operation beginning in dependence of compactable material type. Vibratory plate with oscillation frequency of 70-80 Hz causes change in thixotropic properties of compactable material and reduces resistance to compacting thereof. Disturbing action directed at an angle to material surface also decreases resistance to material compacting. EFFECT: increased productivity, reduced power consumption during material compacting. 3 dwg