Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Tower crane, and method, device and system for controlling slewing mechanism of tower crane

A technology of tower crane and slewing mechanism, which is applied in the direction of crane, transportation and packaging, load hanging components, etc., which can solve the problems that the drag system cannot overcome the shaking and slewing, and cannot be adjusted.

Active Publication Date: 2014-04-02
ZOOMLION HEAVY IND CO LTD
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in each gear of the tower crane in the prior art, after the controller 101 determines the eddy current control signal according to the gear position signal, the intelligent eddy current control module 102 controls the eddy current parameters applied to the motor by the eddy current device 103 according to the eddy current control signal They are all fixed, and the eddy current applied by the eddy current device 103 to the motor 104 cannot be flexibly adjusted according to the current actual load of the motor 104, so that the drag system of the tower crane cannot overcome the jitter due to the effects of wind and friction , and abnormal situations such as difficult rotation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Tower crane, and method, device and system for controlling slewing mechanism of tower crane
  • Tower crane, and method, device and system for controlling slewing mechanism of tower crane
  • Tower crane, and method, device and system for controlling slewing mechanism of tower crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0052] Please refer to figure 2 , figure 2 A schematic flow chart of a control method for the slewing mechanism of a tower crane is provided for the present invention, and the control method of the slewing mechanism of a tower crane provided by the present invention includes:

[0053] Step 201: the control device obtains the torque current parameter of the load torque fed back by the frequency converter;

[0054] Step 202: the control device determines the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a tower crane, and a method, a device and a system for controlling a slewing mechanism of the tower crane. The system comprises a controller, a frequency converter, an intelligent eddy current control module, an eddy current device and a motor, wherein the motor is used for driving a slewing mechanism of the tower crane to act; the frequency converter is used for feeding back moment current parameters of the load moment of the motor to the controller; the controller is used for determining actual output eddy current parameters according to the moment current parameters; the intelligent eddy current control module is used for regulating eddy current applied to the motor by the eddy current device according to the actual output eddy current parameters. According to the system for controlling the slewing mechanism of the tower crane, provided by the invention, the abnormal situations such as jittering and slewing difficulty caused by influence on a slewing dragging system of the tower crane due to factors such as wind force and friction force can be eliminated.

Description

technical field [0001] The invention relates to the technical field of electrical control of hoisting machinery, in particular to a control method, device and system for a tower crane and its slewing mechanism. Background technique [0002] When the slewing drag system of the tower crane has a certain hoisting load, the load of the motor will increase due to uncertain factors such as wind force and friction, which will cause the slewing drag system to vibrate and turn hard during the slewing operation. Condition, which directly affects the slewing performance of the slewing drag system. [0003] In the prior art, the eddy current is generally applied to the motor through the eddy current device to ensure the stable operation of the slewing drive system of the tower crane, such as figure 1 As shown, in the eddy current control system of the tower crane, the controller 101 obtains the currently operating gear signal according to the input gear signal and the limit signal, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B66C13/22B66C23/84
Inventor 周万传衣磊
Owner ZOOMLION HEAVY IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com