Four-drum Grab Ship Unloader Drum Single Action Rope Change System and Rope Change Method

Abstract

The invention discloses a winding drum single-acting rope changing system of a four-winding drum grab ship unloader and a rope changing method. A trolley running motor is provided with two output shafts which are connected with two intermediate shafts by use of on-off devices, respectively; the two intermediate shafts are connected with two planetary differential reducers by use of couplings, respectively; the trolley running motor, a grab hoisting motor and a grab opening / closing motor are all variable-frequency motors. The invention also discloses the rope changing method of the rope changing system; the rope changing method comprises that the on-off device on the side of a single-acting winding drum not needed by rope changing is disconnected manually when the braking state of the rope changing system is stopped, and the synthetic rotating speed of one winding drum arranged on the same planetary differential reducer is set to zero and the other winding drum arranged on the same planetary differential reducer is enabled to rotate at a synthetic rotating speed according to the differential principle of the drum arranged on the same planetary differential reducer by controlling the rotating speed and the rotating direction of the trolley running motor, the grab hoisting motor or the grab opening / closing motor. The winding drum single-acting rope changing system of the four-winding drum grab ship unloader and the rope changing method are convenient to operate and short in rope changing time; besides, the cost is reduced.

Description

technical field [0001] The invention relates to the field of grab ship unloaders, in particular to a four-drum grab ship unloader drum single-action rope changing system and a rope changing method. Background technique [0002] With the development of port machinery, the four-drum grab ship unloader has occupied almost all new markets in recent years. The steel wire rope of the ship unloader is a vulnerable part, and the replacement and maintenance workload is relatively large. [0003] In order to replace the steel wire rope, it is necessary to move a single drum and keep the other drums still. In order to solve the problem that the four drums of the planetary differential four-drum grab ship unloader operate independently, it is usually used in each drum Install a disc brake on the top to fix the reel, or process a concentric hole on the reel disc, and fix the reel manually through the pin shaft, and use the multi-degree-of-freedom principle of the planetary differential ...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of high cost, large space requirements, difficult operation and large manpower consumption in the four-drum grab ship unloader in the prior art to realize the single-action rope change of the drum, and develops a four-drum grab ship unloader. Single-action Rope Change System and Rope Change Method for Ship Engine Drum

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