To understand the hydraulic system and electrical system of asphalt concrete paver automatic leveling device      

Hydraulic system：

The typical hydraulic system consists of oil pump, safety valve, flow valve, electromagnetic reversing valve, hydraulic control check valve, cylinder and tubing, joint. The pressure oil output from the oil pump is discharged from the quantitative oil through two flow valves. Under the control of the solenoid valve, the two oil cylinders are entered through the hydraulic control check valve. The expansion of the cylinder piston rod controls the reduction and elevation of the front hinge point of the traction arm, and keeps the working angle of the ironing plate unchanged, so as to reach the smoothness standard of the road surface. At the same time, the thickness and curve can also be adjusted.

Some hydraulic systems adopt a flow valve and a diverter valve instead of the two flow valves of the typical hydraulic system. The pressure of the oil pump is discharged from the quantitative oil flow through the flow valve, and then is supplied to the quantitative oil by the diverter valve to the left and right two electromagnetic valves, and the effect is the same.

The hydraulic system is various, but the common point is to supply quantitative oil to the oil cylinder, generally 2~3L/min, to ensure the timeliness and stability of the cylinder adjustment.

Electrical system:

It consists of a control box, a longitudinal controller, a horizontal controller and a slope setter.

(1) the control box is set on both sides of the console and the ironing board, which is convenient for the driver and the crew to operate. The manual lifting switch is controlled to adjust the lifting of the left and right cylinders to realize the adjustment of the elevation angle of the ironing board. Automatic control switch can realize automatic control of longitudinal and horizontal controller of automatic leveling system.

(2) longitudinal controller: control the longitudinal roughness of road surface. His arm level changes through the quantity in the base line detection of pavement thickness deviation, the thickness deviation angle sensor is sent to the controller in the longitudinal vertical through the connecting rod, processed into pulse signals in the electromagnetic change-over valve of variable width, the length of time control switch, a mechanical operation of the towing arm in hydraulic system under the effect of eliminating the deviation.

(3) the lateral controller, control the pavement cross slope, it detects the deviation signal about a traction arm, processed into pulse signals of variable width into the electromagnetic change-over valve control switch, the length of time, a mechanical operation of the towing arm in the role of the hydraulic system, and eliminate the deviation from.