Luffing mechanism and full power speed regulation method of luffing mechanism

A technology of variable amplitude mechanism and speed regulation method, applied in cranes, load hanging components, transportation and packaging, etc., can solve the problems of power waste of variable frequency motors, and achieve the effect of solving power waste

Active Publication Date: 2015-08-12
ZOOMLION HEAVY IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the working range of the constant torque section, several gears are generally set between the lowest speed and the highest speed during full-load operation; in the working section of the constant power section, since there are various load conditions between full load and no load, The speed gear is not easy to set. In order to prevent the inverter motor from being overloaded, it can only take measures to limit its high-speed gear and let it run in a low-speed gear, which causes a serious waste of power for the inverter motor.

Method used

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  • Luffing mechanism and full power speed regulation method of luffing mechanism
  • Luffing mechanism and full power speed regulation method of luffing mechanism
  • Luffing mechanism and full power speed regulation method of luffing mechanism

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Embodiment Construction

[0021] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0022] Such as figure 1 and figure 2 As shown, according to the first embodiment of the present invention, a luffing mechanism is provided, wherein the luffing reel 10 is driven by a variable frequency motor, and the luffing reel 10 is wound with a first luffing rope 40 and a second The luffing rope 70, the first luffing rope 40 goes out from the luffing drum 10, winds through the supporting wheel 20 and the arm tip pulley 30, and is fixed on the first side of the luffing trolley 60, the second luffing rope 70 After the rope is taken out from the luffing drum 10, it winds around the arm root pulley 80, and is fixed on the second side opposite to the first side of the luffing trolley 60, thro...

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Abstract

The invention provides a luffing mechanism and a luffing mechanism full-power speed regulating method. The luffing mechanism full-power speed regulating method comprises acquiring resultant force delta of a first luffing rope (40) and a second luffing rope (70) corresponding to a current lifting weight; and regulating the actual rotating speed of a variable-frequency motor depending on the delta F. The technical solution disclosed by the invention can realize the automatic full-power speed regulation of the variable-frequency motor of the luffing mechanism depending on loaded weight of a lifting hook.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a luffing mechanism and a full power speed regulation method of the luffing mechanism. Background technique [0002] At present, the luffing mechanism of the tower crane adopts the multi-terminal speed selection of the frequency converter to change the speed, and generally only has 5 gears. In the working range of the constant torque section, several gears are generally set between the lowest speed and the highest speed during full-load operation; in the working section of the constant power section, since there are various load conditions between full load and no load, The speed gear is not easy to set. In order to prevent the inverter motor from being overloaded, it can only be taken to limit its high-speed gear and let it run in a low-speed gear, which causes a serious waste of power of the frequency converter motor. Contents of the invention [0003] The present invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C23/82B66C13/22
Inventor 易德辉关进军何首文
Owner ZOOMLION HEAVY IND CO LTD
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