RU2627225C1 - Load lifting crane with aerodynamic balancing - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: lifting crane contains a pneumon-blow tower made of rolled material with a boom horizontally mounted on the top and standing on the self-propelled chassis. The lifted load is counterbalanced by the moving ballast weight moving along the boom. The tower stability is provided by four propeller rotor units.

EFFECT: improved crane balancing.

4 cl; 3 dwg

Description

The invention relates to the field of lifting equipment and can be used to create machines having cargo characteristics that are unattainable for existing equipment.

All non-stationary (i.e. able to move) existing lifting equipment for lifting loads uses its own weight multiplied by the shoulder of the stop (horizontal distance from the center of gravity of the crane to the outrigger or the outer edge of the track). And therefore, larger and heavier machines are made to increase the cargo-height characteristics. And this, in addition to increasing their material consumption, limits their ability to move (in particular, on roads).

The aim of the invention is the creation of such machines, the weight characteristics of which would not be directly tied to their own weight and dimensions.

This goal is achieved by the fact that the lifting machine is torn off from the chassis carrying it and rises above the load to be lifted on the air tower. At the same time, the load being lifted, at all stages of lifting, is balanced by the ballast weight moving along the crane arrow. The inevitable small weight imbalance, plus wind loads are damped by the joint work of four propulsion systems.

Technically, this goal is achieved by the fact that the crane with aerodynamic balancing (hereinafter GKAB) contains a self-propelled chassis with a longitudinally arranged drum, with an elastic long-length cylinder wound on it and a truss-type boom separate from it with two pairs of rotor-propulsion systems and a ballast with the possibility of longitudinal moving along the boom. Rotor-propulsion systems with horizontal axes of rotation are installed at the ends of four consoles located crosswise in the same plane. An elastic long cylinder after it is unwound from the drum and filled with compressed air acquires the function of a vertical tower (tower crane). In the moving ballast cargo is located both all lifting equipment and the compressor for filling with compressed air an elastic long cylinder.

In FIG. 1 shows the SCAB in the operating position. In FIG. 2 is a transverse section of the drum AA at the initial moment of unwinding of the cylinder. In FIG. 3 - section AA in the working position.

GKAB consists of a drum 1 mounted on the chassis, including a tractor 2 and a rear trolley 3 with swivel wheels. An elastic long cylinder 4 is wound on the drum 1, attached at one end to the support cone 5, and at the other to the head 6, which is docked to the boom 7. Screw-motor units 8 are connected to the head 6 by means of four cross-shaped trunks 8. A longitudinally movable ballast weight is mounted on the boom 7 9 with all crane equipment inside.

GKAB acts as follows. Upon arrival at the mounting site (separate) of the chassis with drum 1 and boom 7 with crane equipment, they are assembled using another crane (smaller). For this, boom 7 is mounted on high goats (not shown) and a chassis with drum 1 is brought under it. Next, also with the help of an additional column. on the boom 7, a ballast weight 9 is installed, with crane equipment inside, and on the bottom, on the head 6, consoles with screw-motors installed in them are attached 8. The upper part of the elastic cylinder 4 wound on the drum 1 is connected to the head 6 and using a compressor ( not shown) located in the ballast weight 9, compressed atmospheric air begins to be pumped into the cylinder 4. As a consequence of this, the cylinder 4 begins to roll off from the drum 1, turning into a tower and raising the boom 7 to a working height. At the same time, the vertical position of the tower both during lifting and further is ensured by the operation of the propulsion systems 8. The latter are driven by separate electric motors, equipped with mechanisms for changing the pitch of the blades and controlled by a computer that synchronizes their operation (not shown). After reaching the working height, the ballast weight 9 is additionally weighted with water (pumped from below) and work begins in the normal crane mode.

Claims (4)

1. A crane with aerodynamic balancing, comprising a self-propelled chassis with a longitudinally arranged drum, with an elastic long-length cylinder wound around it and a truss-type boom separate from it with two pairs of rotor-propulsion systems and a ballast weight that can be moved longitudinally along the boom. 2. A lifting crane according to claim 1, comprising a rotor-motor with horizontal axes of rotation mounted at the ends of four consoles arranged in a cross-shaped manner in the same plane. 3. The crane according to claim 1, containing an elastic long cylinder, which, after it is unwound from the drum and filled with compressed air, begins to perform the function of a vertical tower. 4. The crane according to claim 1, containing a movable ballast weight, which houses all crane lifting equipment and a compressor for filling with compressed air an elastic long cylinder.

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