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Crane, method for controlling tension of steel wire rope and hydraulic system

A hydraulic system and wire rope technology, applied in the field of method and hydraulic system, crane and control wire rope tension, can solve problems such as insufficient stability and low work efficiency, and achieve the improvement of stress state, increase working life, reduce stroke and The effect of adjusting the time

Active Publication Date: 2014-04-02
ZOOMLION HEAVY IND CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a crane, a method and a hydraulic system for controlling the pulling force of the steel wire rope, so as to solve the insufficient stability of the telescopic boom crane with the superlift hoisting mechanism in the boom telescoping process in the prior art, and the working low efficiency problem

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  • Crane, method for controlling tension of steel wire rope and hydraulic system
  • Crane, method for controlling tension of steel wire rope and hydraulic system
  • Crane, method for controlling tension of steel wire rope and hydraulic system

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Embodiment Construction

[0035] 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. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0036] figure 2 It is a schematic diagram of a basic structure of a hydraulic system for controlling the pulling force of a wire rope according to an embodiment of the present invention. Such as figure 2 As shown, the hydraulic system for controlling the pulling force of the wire rope in the embodiment of the present invention mainly includes a hydraulic motor 1 , a main reversing valve 2 , a switching valve 3 , a one-way valve 4 , and a back pressure valve 5 . The hydraulic motor 1 is used to output power to the wire rope traction device; the main reversing valve 2 is used to introduce hydraulic oil into the hydraulic system; the back pressure valve 5 is used to provide back pressure to th...

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Abstract

A hydraulic system for controlling tension of a steel wire rope comprises a master reversing valve (2), a switching valve (3), a check valve (4), a backpressure valve (5), and a hydraulic motor (1). The master reversing valve (2) is used for leading hydraulic oil into or out of the hydraulic system; the hydraulic motor (1) is used for outputting power to a traction device of the steel wire rope; a first end of the switching valve (3) is in communication with a first oil outlet (A) of the master reversing valve (2), an inlet of the check valve (4), and an outlet of the backpressure valve (5); a second end of the switching valve (3) is in communication with a second oil outlet (B) of the master reversing valve (2) and a first end (B) of the hydraulic motor; and an inlet of the backpressure valve (5) is in communication with an outlet of the check valve (4) and a second end (A) of the hydraulic motor (1). The present invention provides a crane having the hydraulic system and a method for controlling tension of a steel wire rope. The system and the method can solve the problems in the prior art that a telescopic-boom crane with a super-lift winding mechanism has low stability and low work efficiency during stretching of a lifting boom.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane, a method for controlling tension of a wire rope, and a hydraulic system. Background technique [0002] Crane is a kind of common construction machinery. With the continuous improvement of production demand, the lifting load of the crane is also increasing. For telescopic boom cranes, in order to increase the overall stability after the boom is stretched out, most of the large telescopic boom cranes are equipped with a superlift winch mechanism. The super-lift winch mechanism is mainly composed of steel wire rope, super-lift winch motor, super-lift reducer and auxiliary hydraulic pressure and control systems. figure 1 is a schematic diagram of the boom of a crane, at figure 1 Among them, 11 is a boom, and 12 is a super lifting wire rope. [0003] In the related art, when the telescopic boom of the crane is stretched out, with the continuous increase of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66C13/20F15B13/02B66C23/693B66C23/72
CPCB66C23/823
Inventor 詹纯新刘权李英智张建军李怀福李义
Owner ZOOMLION HEAVY IND CO LTD
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