Linkage double hoisting mechanisms of tower crane and speed regulating method

A technology of tower crane and hoisting mechanism, applied in the direction of crane, clockwork mechanism, hoisting device, etc., can solve the problems of high cost, unable to reach the maximum lifting capacity, poor effect, etc., and achieve the effect that meets the requirements

Active Publication Date: 2014-05-21
SHANDONG DAHAN CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Sometimes the construction project is relatively high, and a hoisting mechanism is limited by the size of the drum, and the capacity of the steel wire rope is limited, which cannot reach the height required by the project; in other cases, it is limited by the capacity of the steel wire rope. After the height, only four ropes can be used instead of two ropes, so that the maximum lifting capacity required by the design cannot be reached;
[0004] One of the lifting characteristics of tower cranes is heavy load and low speed, high speed and light load, and there is a minimum speed requirement for accurate placement of heavy objects. Therefore, multi-speed motors and DC motors are used in engineering to obtain various lifting speeds. , Winding motor speed regulation and frequency conversion and other methods, some of which are not effective and have a large impact, and some of which are more costly

Method used

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  • Linkage double hoisting mechanisms of tower crane and speed regulating method
  • Linkage double hoisting mechanisms of tower crane and speed regulating method
  • Linkage double hoisting mechanisms of tower crane and speed regulating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first set of lifting structure includes a single-speed motor 1, a reducer I2 and a reel I3; the other set of lifting structures includes a double-speed motor 4, a reducer II5 and a reel II6, and the reel I3 is connected to one end of the wire rope 9, and After the wire rope walks around the diverting pulley 8 at the arm end of the lifting mechanism, the trolley and the hook 7, it is connected with the reel II6. The two ends of the lifting wire rope are rooted in two drums respectively, and the wire rope goes around the transition pulleys, the turning pulley at the arm end, the trolley and the hook to realize double or quadruple rope winding (the figure shows the quadruple rope winding method) .

[0028] Since the wire rope can go around two drums, the rope capacity is L 1 +L 2 , which meets the length of steel wire rope required for high-rise construction, and can meet the requirements of maximum lifting capacity if four-fold rope winding is used.

[0029] Contro...

Embodiment 2

[0031] When both motor I1 and motor II4 are single-speed motors, the speed of motor I is V 1 , the speed of motor II is V 2 , four speeds are obtained through combination, that is, motor I moves, motor II does not move, and the speed V is obtained 1 ;Motor I does not move, motor II moves, get speed V 2 ;Motor I, motor II turn in the opposite direction, get the speed V 1 +V 2;Motor I moves, and motor II turns in the same direction, and the speed V is obtained 1 -V 2 ;

Embodiment 3

[0033] When motor I is a two-speed motor and motor II is a two-speed motor, the speed of motor I is V 1 , V 2 , the speed of motor II is V 3 , V 4 , 12 speeds are obtained through combination, that is, motor I moves, motor II does not move, and speed V is obtained 1 , V 2 ;Motor I does not move, motor II moves, get speed V 3 , V 4 ;Motor I, motor II turn in the opposite direction, get the speed V 1 +V 3 , V 1 +V 4 , V 2 +V 3 , V 2 +V 4 ;Motor I moves, and motor II turns in the same direction, and the speed V is obtained 1 -V 3 , V 1 -V 4 , V 2 -V 3 , V 2 -V 4 .

[0034] The invention uses two most common hoisting mechanisms to realize multiple hoisting speeds with the least cost, and meets the requirements of large and medium-sized tower cranes on hoisting speed and rope capacity.

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Abstract

The invention discloses linkage double-hoisting mechanisms of a tower crane and a speed regulating method. The tower crane is provided with the two hoisting mechanisms, wherein one hoisting mechanism comprises a single-speed electric motor, a speed reducer I and a winding drum I, the other hoisting mechanism comprises a double-speed electric motor, a speed reducer II and a winding drum II, the winding drum I and the winding drum II are respectively wound with a plurality of steel wire ropes, the steel wire ropes wind around steering pulleys, load-trolleys and lifting hooks of arm ends of the hoisting mechanisms respectively, and the single-speed electric motor, the double-speed electric motor and a controller are connected. The two hoisting mechanisms are used, the steel wire ropes string the two winding drums, the lifting hooks and the load-trolleys of the tower crane, more steel wire ropes can be contained, and requirements of the tower crane for the lengths of the steel wire ropes are met. The hoisting mechanisms at two different steel wire rope linear speeds are adopted, and speed regulation can be easily achieved through combination of the speeds.

Description

technical field [0001] The invention relates to a linkage double-hoisting mechanism and a speed regulating method of a tower crane. Background technique [0002] Generally, tower cranes use one hoisting mechanism, and some use two hoisting mechanisms to drive the main hook and the auxiliary hook separately, which are independent of each other; [0003] Sometimes the construction project is relatively high, and a hoisting mechanism is limited by the size of the drum, and the capacity of the steel wire rope is limited, which cannot reach the height required by the project; in other cases, it is limited by the capacity of the steel wire rope. After the height, only four ropes can be used instead of two ropes, so that the maximum lifting capacity required by the design cannot be reached; [0004] One of the lifting characteristics of tower cranes is heavy load and low speed, high speed and light load, and there is a minimum speed requirement for accurate placement of heavy obje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66D1/24B66C23/62
Inventor 毛瑞年孟虎董书林
Owner SHANDONG DAHAN CONSTR MACHINERY
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