Hydraulic cylinder synchronization control loop and crane with same
A hydraulic cylinder, synchronous control technology, applied in mechanical equipment, fluid pressure actuating devices, servo motors, etc., can solve the problems of inconvenient operation and low work efficiency, and achieve the effect of good synchronous control accuracy
Inactive Publication Date: 2012-05-02
XUZHOU HEAVY MASCH CO LTD
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Problems solved by technology
However, the actual operation of this scheme continuously switches the working state of the on-off valve for adjustment, which is inconvenient to operate and has the defect of low working efficiency
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[0027] The core of the present invention is to provide a synchronous control circuit for hydraulic oil cylinders, which can effectively improve the working efficiency on the basis of ensuring the synchronism of the double actuators controlled by the control circuit. The present embodiment will be described in detail below in conjunction with the accompanying drawings.
[0028] Without loss of generality, this embodiment will be described in detail with a wheeled crane as the main body.
[0029] See figure 2 , which is a schematic diagram of the overall structure of the wheeled crane described in this embodiment.
[0030] As shown in the figure, the crane includes a wheeled chassis, a car turntable arranged on the wheel chassis, a boom device hinged at the front of the car turntable, a hoisting device that provides driving force for lifting heavy objects, and a The main functional components such as the counterweight device at the rear of the car turntable.
[0031]It shoul...
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The invention discloses a first hydraulic cylinder and a second hydraulic cylinder for driving the same actuating member, wherein rod cavities and rodless cavities of the two hydraulic cylinders are connected in parallel, and the expansion of the two hydraulic cylinders can be controlled by a directional control valve; moreover, a flow distributing and collecting valve is arranged between the hydraulic cylinders and the directional control valve to realize synchronous outwards-extension by utilizing the flow distributing function of the flow distributing and collecting valve and to realize synchronous retraction by utilizing the flow collecting function of the flow distributing and collecting valve. Synchronous direction control valves are arranged among the rod cavity of each cylinder, the directional control valve and the rodless cavity of the other cylinder to control the communication of the rod cavity of the corresponding hydraulic cylinder and the rodless cavity of the other hydraulic cylinder or continuity of the rod cavity of the corresponding hydraulic cylinder and the directional control valve by switching of the synchronous direction control valves. Compared with the prior art, the control loop has good synchronization control precision, frequent adjustment is not needed in the control process, and the working efficiency for synchronization control is greatly improved. On the basis, the invention also provides a crane with the hydraulic cylinder synchronization control loop.
Description
technical field [0001] The invention relates to engineering machinery technology, in particular to a hydraulic oil cylinder synchronous control circuit and a crane using the control circuit. Background technique [0002] The hydraulic synchronization system is an eternal technical subject in the application practice of hydraulic technology to ensure the accuracy of the action performed. At present, self-propelled cranes have developed rapidly, and it took less than ten years to complete the leap-forward development from 100-ton products to 1,000-ton products; based on changes in the lifting performance of new models, a variety of dual hydraulic cylinders have emerged. Executing systems, such as crane super-lifting mechanism, variable-amplitude jib mechanism and hoisting locking ratchet mechanism, etc. In addition, the counterweight connection of traditional cranes also uses dual hydraulic cylinders to complete the self-disassembly and assembly operation of the counterweight...
Claims
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IPC IPC(8): F15B11/22
Inventor 史先信王必旺唐红彩张晓磊
Owner XUZHOU HEAVY MASCH CO LTD