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Rotating hydraulic system of crane and its control method

A hydraulic system and crane technology, applied in the direction of cranes, etc., can solve the problems of poor real-time adjustment, achieve the effect of reducing impact phenomenon, smooth rotation, and improving stability

Inactive Publication Date: 2012-02-01
XUZHOU HEAVY MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor real-time adjustment of the valves in the device, the motor cannot be effectively stopped when the load changes greatly.

Method used

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  • Rotating hydraulic system of crane and its control method
  • Rotating hydraulic system of crane and its control method
  • Rotating hydraulic system of crane and its control method

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Embodiment Construction

[0062] The core of the invention is to provide a crane slewing hydraulic system. The system is an open system that adopts an independent control method of oil inlet and outlet, which can make the crane run more smoothly and control the cost within a certain range, which has very high economic benefits.

[0063] Another core of the present invention is to provide a control method for the above crane slewing hydraulic system.

[0064] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0065] The terms "first, second" and the like in this article are only for convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0066] Please see figure 2 , figure 2 It is a principle schematic diagram o...

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PUM

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Abstract

The invention discloses a crane rotating hydraulic system used for mobile cranes. The system comprises a hydraulic pump, a rotary motor, a brake oil cylinder, and additionally a flow adjustable hydraulic operated directional valve, a first flow control valve, a second flow control valve, and a brake directional valve. The system adopts oil taking, oil return and bypass independent speed control circuits, i.e. with the oil taking circuit, oil return circuit and bypass oil circuit mutually independent. According to external load change, under complex load conditions, independent control of the three circuits can be realized by adjusting the opening amounts of the hydraulic operated directional valve, the first flow control valve, and the second flow control valve, so that the crane can operate more stably and the cost can be controlled within a certain scope. Therefore, the system provided in the invention has very high economic efficiency. The invention also discloses a control method for the crane rotating hydraulic system.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulic system for driving a turntable of a crane to perform rotary motion. The present invention also relates to a control method of the above-mentioned hydraulic system. Background technique [0002] With the rapid development of my country's economic construction, the market demand for wheeled cranes, especially medium and large tonnage wheeled cranes, is increasing day by day. [0003] When the wheeled crane is working, it uses the boom to lift the heavy objects, and then relies on the turntable to transfer the heavy objects from one position to another to complete the work task. Therefore, the stability of the rotation is an important indicator to measure the quality of the crane. The wheeled crane rotation The action is controlled by the rotary hydraulic system, and the design of the hydraulic system will determine the stability of the rotary. [0004] Accor...

Claims

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Application Information

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IPC IPC(8): B66C23/86
Inventor 刘邦才王必旺周飞胡小冬
Owner XUZHOU HEAVY MASCH CO LTD
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