Bucket closing lifting control system and method of four-rope grab bucket crane

A technology of control system and control method, applied in the direction of load hanging components, transportation and packaging, etc., can solve the problems of low precision, low efficiency, poor adjustment speed, etc., and achieve the effect of improving efficiency

Active Publication Date: 2014-05-07
SUZHOU INOVANCE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a closed-bucket lifting control system and method for a four-rope gra

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  • Bucket closing lifting control system and method of four-rope grab bucket crane
  • Bucket closing lifting control system and method of four-rope grab bucket crane
  • Bucket closing lifting control system and method of four-rope grab bucket crane

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0026] Such as figure 2 As shown, it is a schematic diagram of an embodiment of the closed-bucket lifting control system for a four-rope grab crane of the present invention. The above-mentioned closed-bucket lifting control system includes a main control unit 21 , a frequency converter 22 for switching machines and a frequency converter 23 for supporting machines. In the present embodiment, the switching motor is the main engine, and the switching motor frequency converter 22 is used to drive the switching motor operation to realize the opening and closing of the grab bucket; the supporting motor...

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Abstract

The invention provides a bucket closing lifting control system of a four-rope grab bucket crane. The bucket closing lifting control system of the four-rope grab bucket crane comprises a main control unit, an on/off frequency converter and a support machine frequency converter, wherein the main control unit comprises a speed control subunit and a torque obtaining subunit; the speed control subunit is used for inputting an operation frequency instruction into the on/off frequency converter so that the on/off frequency converter to conduct the operation frequency instruction and to drive an on/off motor to operate; the torque obtaining subunit is used for obtaining an output torque of the opening and closing machine frequency converter, outputting the output torque of the opening and closing machine frequency converter to the support machine frequency converter and enabling the output torque of the support machine frequency converter to drive the motor to operate. The invention also provides a corresponding method. According to the bucket closing lifting control system and method of the four-rope grab bucket crane, the support machine frequency converter operates along with the torque of the on/off frequency converter, so that the support machine frequency converter is capable of quickly and automatically adjusting output frequency, thus dynamic balance of the grab bucket state can be reached and the application efficiency of the grab bucket can be improved.

Description

technical field [0001] The invention relates to the field of crane control, more specifically, to a closed-bucket lifting control system and method for a four-rope grab bucket crane. Background technique [0002] The four-rope grab crane is controlled by two frequency converters, one of which controls the opening and closing of the grab mechanism, that is, the opening and closing machine frequency converter 12; the other frequency converter controls the lifting and lowering of the grab mechanism, That is, the frequency converter 13 of the supporting machine. Two frequency converters respectively drive two motors (that is, the switching motor 14 and the supporting motor 15), and each motor shaft is respectively equipped with incremental encoders 16 and 17 to feed back the state of the motors to the corresponding motors through the number of encoder pulses. The frequency converter, so that the frequency converter can calculate the current switch state of the grab according to...

Claims

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Application Information

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IPC IPC(8): B66C13/22
Inventor 殷杰周晖强
Owner SUZHOU INOVANCE TECH CO LTD
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