SCRAPER WITH GAS LUBRICATION OF THE BUCKET Russian patent published in 2021 - IPC E02F3/64 

FIELD: soil-shifting.

SUBSTANCE: invention relates to excavating equipment and can be applied in scrapers. The technical result is achieved by the fact that the scraper with gas lubrication of the bucket comprises a basic machine, a hydraulically driven bucket including a back sliding hydraulically driven wall and side walls with a sectional gas collector communicating with the receiver through controlled pneumatic valves, wherein the scraper is equipped with a hydraulic accumulator, a reduction hydraulic valve, sensors for pressure, movement and volume of soil in the bucket, return pneumatic valves, adjustable pneumatic throttles and a pneumatic cylinder, wherein the pneumatic valves are made electrically controlled and the control coils thereof are connected by electric lines with the contacts of the soil volume sensor installed on the back sliding wall and with the contacts of the movement sensors located on the body of the hydraulic cylinder of the drive of the back sliding wall, wherein a lock shutter is fixed on the rod thereof, wherein the compressed gas source is made in the form of a pneumatic cylinder attached to the frame by the body, to the bucket by the rod, and the cavities thereof communicate with the environment via an air filter and the intake return pneumatic valves and with the receiver via the pressure return pneumatic valves and adjustable pneumatic throttles, wherein the hydraulic distributor of the bucket drive communicates with the hydraulic accumulator via the controlled hydraulic valve and is made four-positional, configured to connect the latter with the cavities for lifting the hydraulic cylinders of the bucket.

EFFECT: increase in the reliability due to the use of electrically controlled pneumatic valves and reduction in the energy consumption achieved by using the kinetic energy of oscillations of the working equipment for the air reserve in the receiver.

3 cl, 1 dwg