Alternating current frequency conversion tyre crane

A tire crane, AC frequency conversion technology, applied to cranes and other directions, can solve the problems of high cost of DC motors, troublesome maintenance, and limited use of the environment

Inactive Publication Date: 2008-07-09
WEIHUA GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the mechanical commutator of the DC motor, the cost of the DC motor

Method used

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  • Alternating current frequency conversion tyre crane
  • Alternating current frequency conversion tyre crane
  • Alternating current frequency conversion tyre crane

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Embodiment Construction

[0005] The present invention solves the high cost and inconvenient maintenance of DC motors and their speed regulating systems used in the hoisting, turning, driving, and jib luffing of existing port tire cranes, and the inability to use the existing AC power sources in ports, resulting in energy Waste and environmental pollution problems. For this reason, the present invention changes DC generator into AC generator and the DC motor of hoisting, turning, driving and boom luffing becomes AC motor. By adopting the AC motor, the stepless speed regulation can be realized conveniently with the existing frequency conversion technology. The present invention will be further described in conjunction with the above accompanying drawings. , the luffing mechanism 3, the hoisting mechanism 6, the boom 7 and the hook 8 are the same, and the changed part is to change the DC generator driven by the diesel engine into an AC generator to form a diesel AC generator set 1, and the resulting 380 ...

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Abstract

A crane with alternating current frequency conversion tyres relates a crane. The purpose of the present invention is to provide a crane with the alternating current frequency conversion tyres, which saves energy, is environmental protective and has low price. The technical proposal of the present invention is that the crane with the alternating current frequency conversion tyres comprises a diesel engine generator group with a generator of an alternating current generator, a hoisting motor, a gyroidal motor, a variable amplitude motor and two sets of transducers which are respectively connected with the power supply of the diesel engine generator group or the power supply of a power network. The power supply of a programmable controller PLC is provided with AC220V which is produced by the diesel engine generator group or a three-phase power supply through an isolation transformer. A traveling motor and the hoisting motor are respectively connected with the output end of one transducer. The variable amplitude motor is connected with the output end of the other transducer. A left control platform and a right control platform are respectively connected with the input module of the programmable controller, the output module of which is respectively connected with the timing ports of the two sets of the transducers. The present invention is used for hoisting at port.

Description

Technical field: [0001] The invention relates to a crane, in particular to an AC frequency conversion tire crane. Background technique: [0002] The power used by the existing port tire crane is that the diesel engine drives the DC generator to generate electricity as the power supply of the DC motors of each working mechanism. Due to the mechanical commutator of the DC motor, the cost of the DC motor is high, the maintenance is troublesome, and the use environment is limited. Compared with DC motors, AC motors, especially squirrel-cage asynchronous motors, have the advantages of simple structure, low cost, durability, reliable operation, convenient maintenance, small inertia, and good dynamic response. After research on AC speed regulation in recent years, especially The mature application of AC frequency converter technology provides conditions for port tire cranes to use AC motors. Invention content: [0003] The object of the present invention is to provide an AC fre...

Claims

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Application Information

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IPC IPC(8): B66C23/06B66C23/18B66C23/58
Inventor 徐长生张理科孙明尧刘文明
Owner WEIHUA GROUP
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