Crane with brake failure protection device and brake failure protection method

A failure protection and brake technology, which is applied in hoisting devices and spring mechanisms, etc., can solve problems such as low reliability and complex mechanical device structure, increase system volume and cost, improve safety factor, large economy and The effect of social benefits

Inactive Publication Date: 2010-11-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the structure of the current mechanical device for preventing the hook of the crane is too complicated and the reliability is not high, and to provide a crane with a brake failure protection device and a brake failure protection method

Method used

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  • Crane with brake failure protection device and brake failure protection method
  • Crane with brake failure protection device and brake failure protection method
  • Crane with brake failure protection device and brake failure protection method

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specific Embodiment approach 1

[0021] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment. This embodiment includes a main controller module 1, a frequency converter 2, a hoisting mechanism induction motor 3, a photoelectric encoder 4, a brake 5, a mechanical transmission reduction device 6, a reel 7 and a hook 8. The main The input and output terminals of the controller module 1 are connected to the input and output terminals of the frequency converter 2, the output terminal of the frequency converter 2 is connected to the input terminal of the induction motor 3 of the hoisting mechanism, and a photoelectric encoder is installed at one end of the shaft of the induction motor 3 of the hoisting mechanism 4. The other end of the shaft of the hoisting mechanism induction motor 3 is connected to the input shaft of the mechanical transmission reduction device 6, and the shaft of the hoisting mechanism induction motor 3 between the hoisting mechanism induction...

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Abstract

The invention relates to a crane with a brake failure protection device and a brake failure protection method, belonging to the filed of electromechanical integration and solving the problems of over complicated structure and low reliability of a traditional mechanical device for preventing the brake slip of the crane. The crane with the brake failure protection device comprises a main controller, a transducer, a lifting mechanism induction motor, a photoelectric encoder, a brake, a speed reducer of a mechanical transmission type, a drum, a hook, a signal converter and a high-speed interface module. Whether a lifting mechanism moves or not is detected by the photoelectric encoder when the lifting mechanism is braked by the brake, the brake fails if a signal is output by the photoelectric encoder, and the transducer is controlled by the main controller module to work and drive the lifting mechanism induction motor to generate electromagnetic torque for realizing electromagnetic brake so that a load is slowly put in a suitable position and a brake failure alarm signal is sent. The invention is used for the failure protection of the crane brake.

Description

technical field [0001] The invention relates to a crane with a brake failure protection device and a brake failure protection method, belonging to the field of electromechanical integration. Background technique [0002] During the actual operation of the crane, when the heavy object is hovering in the air, the brake is activated. If the brake fails, the hook slip phenomenon will occur, causing the heavy object to drag the lifting hook down, which seriously affects the reliable operation of the system. It also threatens the safety of on-site personnel. [0003] The brakes of current cranes mostly adopt mechanical structure, and as the final protection means to prevent hook slipping, the problem of hook slipping caused by brake failure is not considered. Some technical solutions use a mechanical protector on the transmission shaft of the crane to prevent the hook from slipping, but it is necessary to add a complicated mechanical device, and this kind of brake generally uses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D1/54B66D5/30
Inventor 孙力修永文吴凤江孙光亚祝庆军
Owner HARBIN INST OF TECH
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