FIELD: transportation.
SUBSTANCE: tower crane comprises a boom rotating around the vertical rotation axis of the turning part, and a brake acting in the non-operating state of the crane, which limits and slows the boom rotation of the crane in the non-operating state. The brake acting in the non-operating state of the crane is made with the possibility to operate in the rotational dependence on speed in such a way that at increasing the crane rotation speed the applied braking torque is greater than at a lower crane rotation speed.
EFFECT: improvement of the crane design.
20 cl, 11 dwg
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