Anti-back-tipping control method and system for hoisting mechanical equipment and hoisting mechanical equipment
A technology for lifting machinery and control methods, which is applied in the testing of mechanical equipment, cranes, and fluid pressure actuation systems, etc., and can solve the problems of unchangeable fixed support reaction force and insufficient accuracy of support reaction force, etc.
Active Publication Date: 2021-01-05
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
It avoids the problem that the fixed support reaction force cannot be changed according to the angle segment and the accuracy of the support reaction force is not enough due to the change of the outflow flow rate of the rodless chamber of the oil cylinder due to the boom luffing speed factor
Method used
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[0068] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0069] figure 2 It is a flow chart of a method for controlling backward tilting of a hoisting machinery provided by an embodiment of the present invention. The hoisting mechanical equipment is provided with an anti-backward hydraulic cylinder for providing anti-backward force, such as figure 2 As shown, the method includes:
[0070] Obtain the target anti-recoil force F of the anti-recoil hydraulic cylinder 1 , The pressure parameter P of the rodless chamber of the anti-backward hydraulic cylinder 1 and rod cavity pressure parameter P 2 ;
[0071] According to the pressure parameter P of the rodless cavity 1 and the rod chamber pressure parameter P 2 ,...
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The invention provides an anti-back-tipping control method and system for hoisting mechanical equipment and the hoisting mechanical equipment, and belongs to the technical field of cranes. The methodcomprises the steps that target anti-back-tipping force F1 of an anti-back-tipping hydraulic oil cylinder, the rodless cavity pressure parameter P1 of the current anti-back-tipping hydraulic oil cylinder and the rod cavity pressure parameter P2 of the current anti-back-tipping hydraulic oil cylinder are obtained; according to the rodless cavity pressure parameter P1 and the rod cavity pressure parameter P2, the actual anti-back-tipping force F<current> currently provided by the anti-back-tipping hydraulic oil cylinder is calculated; under the condition that the actual anti-back-tipping force F<current> is not equal to the target anti-back-tipping force F1, according to the target anti-back-tipping force F1 and the rod cavity pressure parameter P2, target adjusting current Ix of an electricproportional overflow valve communicating with a rodless cavity of the anti-back-tipping hydraulic oil cylinder is calculated; and the overflow pressure of the electric proportional overflow valve isadjusted based on the target adjusting current Ix so as to adjust the anti-back-tipping force provided by the anti-back-tipping hydraulic oil cylinder until the anti-back-tipping force is equal to the target anti-back-tipping force F1.
Description
technical field [0001] The invention relates to the technical field of cranes, in particular to an anti-backward tilt control method for hoisting mechanical equipment, an anti-backward tilt control system for hoisting mechanical equipment, and a lifting mechanical equipment. Background technique [0002] The anti-backward device refers to a combination of mechanical or hydraulic protection devices used in cranes to prevent mechanical structures such as booms or super-lifting masts from tipping backwards due to gravity. [0003] In the existing truss-type lifting machinery equipment, due to the change of the center of gravity of the jib and the rebound of the radius of the jib, an anti-backward device is provided to prevent the jib from moving backwards during the movement or when the jib is stopped. overturned. At present, in the technical field of cranes, there are many types of anti-backward devices, including: springs provide support and reaction force, and as the angle ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B66C13/46B66C13/48B66C23/62B66C23/80B66C23/82F15B21/08F15B19/00
CPCB66C13/46B66C13/48B66C23/62B66C23/80B66C23/828F15B19/00F15B21/087
Inventor 张源刘建华黄赞尚有东沈昌武
Owner ZOOMLION HEAVY IND CO LTD