Control method and device for crane, controller and crane
A control method and technology of control devices, which are applied in the directions of safety devices, transportation and packaging, and load suspension components, can solve problems such as large impact and large braking impact, achieve continuous proportional characteristics, solve short strokes, and reduce design difficulties. Effect
Active Publication Date: 2022-06-28
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 implementations of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present invention, and are not used 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, etc.) involved in the embodiments of the present application, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.
[0031] In addition, if there are descriptions related to "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for the purpose of description, and should...
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Embodiments of the present invention provide a control method and device for a crane, a controller, and a crane. The control method for a crane includes: obtaining the number of layers of steel wire ropes on the drum of the hoisting mechanism; obtaining the load acting on the pulling force on the steel wire rope; and adjusting the rope unwinding speed of the hoisting mechanism according to the number of layers and the pulling force. The embodiment of the present invention can realize flexible braking according to the load, solve the problems of short braking stroke and large impact in the prior art, and reduce the design difficulty of a series of problems caused by the large load impact of the whole vehicle.
Description
technical field [0001] The present invention relates to the technical field, in particular to a control method and device for a crane, a controller and a crane. Background technique [0002] Among the existing hoisting machinery and equipment, according to the construction method, the medium and small 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 through the opening of the foot pedal. Whether it is normally open or normally closed, the main working principle is to open and close the free fall mechanism through the working pressure output by the foot pedal. The foot pedal is actually a pressure reducing valve. Due to the limitation of the valve body stroke, the opening or closing of the pressure reducing va...
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