Control method and device for crane, controller and crane
A control method and control device technology, applied in safety devices, transportation and packaging, load suspension components, etc., can solve problems such as large impact and large braking impact, achieve continuous proportional characteristics, solve short strokes, and reduce design difficulty Effect
Active Publication Date: 2021-12-28
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
The pedal is actually a pressure reducing valve. Due to the limitation of the stroke of the valve body, the opening or closing of the pressure reducing valve often results in braking within a short stroke range, resulting in a large braking impact.
Moreover, the braking torque is designed according to the maximum braking torque. At the same time, since most of them adopt dry braking, it is impossible to realize flexible braking according to the load.
The use of wet braking is also the control method of dry braking, which results in the same braking torque regardless of the size of the load, and the switch value control results in a large impact
Method used
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[0029] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described here are only used to illustrate and explain the embodiments of the present invention, and are not intended to limit the embodiments of the present invention.
[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the implementation of the present application, the directional indications are only used to explain the position in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second" and so on are only for descriptive p...
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The embodiment of the invention provides a control method and device for a crane, a controller and the crane. The control method for the crane comprises the steps that the layer number of steel wire ropes on a winding drum of a hoisting mechanism is obtained; tension of a load acting on the steel wire ropes is obtained; and the rope releasing speed of the hoisting mechanism is adjusted according to the layer number and the tension. According to the embodiment of the control method for the crane, flexible braking can be realized according to the load, the problems of short braking stroke and large impact in the prior art are solved, and the design difficulty of a series of problems caused by large load impact of the whole vehicle is reduced.
Description
technical field [0001] The invention relates to the technical field, in particular to a control method and device for a crane, a controller and the crane. Background technique [0002] Among the existing lifting machinery and equipment, according to the construction method, the small and medium tonnage products often use the free fall method to meet their special requirements. In the existing free fall system design, there are two methods: normally closed and normally open. One is Control the opening of the foot pedal to realize the free fall braking, and the other is to realize the closing of the free fall by the opening of the foot pedal. Whether it is normally open or normally closed, the main working principle is to realize the opening and closing of the free fall mechanism through the working pressure output by the pedal. The pedal is actually a pressure reducing valve. Due to the limitation of the stroke of the valve body, the opening or closing of the pressure reduci...
Claims
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IPC IPC(8): B66C13/48B66C13/46B66C13/16B66C13/22B66C13/20B66C15/00
CPCB66C13/48B66C13/46B66C13/16B66C13/22B66C13/20B66C15/00
Inventor 张源迮占斌沈昌武
Owner ZOOMLION HEAVY IND CO LTD