Method and system for intelligently reducing speed of grab bucket/carrier loader and lifting-switching mechanism

Abstract

The invention discloses a method and system for intelligently reducing the speed of a grab bucket / carrier loader of a lifting-switching mechanism, and the lifting-switching mechanism. The method comprises the following steps: acquiring relevant values of real-time positions of a lifting rope and a switching rope, and acquiring relevant values of real-time rotation speeds of a lifting motor and a switching motor; then calculating the real-time position of the grab bucket / carrier loader and the real-time speed of the grab bucket / carrier loader; then calculating the distance with the need of speed reduction of the grab bucket / carrier loader, and determining the position at which the speed of the grab bucket / carrier loader begins to be reduced according to the distance with the need of speed reduction; judging whether the real-time position of the grab bucket / carrier loader is overlapped with the position with the need of speed reduction, and outputting the control command at the beginning of speed reduction of the grab bucket / carrier loader in overlapping. In the process, the position change of a steel wire rope can be detected accurately in real time, and moreover, the calculation process is simple, so that the feedback speed by the whole speed reduction method is very high; furthermore, the position and distance with the need of speed reduction are determined by the real-time position and real-time speed of the grab bucket / carrier loader, so that the method and the system have relatively good precision.

Description

technical field

[0001] The invention belongs to the technical field of ship unloaders and cranes, and in particular relates to a method, a system and a lifting opening and closing mechanism for realizing intelligent deceleration of a grab bucket / carrier. Background technique

[0002] The grab and carrier of the ship unloader usually move at a uniform acceleration, and before reaching their respective stop positions, they must first decelerate to ensure the normal stop of the grab and carrier.

[0003] At present, the ship unloaders used in China are mainly mechanical differential ship unloaders. Most of the grabs and carriers of this ship unloader have no intelligent deceleration function. Usually, a fixed deceleration position is set to limit the deceleration. When the grab and the carrier vehicle reach their respective deceleration positions, they will be forced to decelerate. For this deceleration method, if the fixed deceleration limit positions of the grab bucket and th...

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