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Dual Hydraulic Cylinder Synchronous Control System and Construction Machinery Applying the Control System

A technology of synchronous control and double hydraulic cylinders, which is applied in mechanical equipment, cranes, fluid pressure actuators, etc., can solve problems such as the difference in back pressure of left and right oil returns, high manufacturing costs of the system, and increased complexity of pipeline assembly. The effect of eliminating the difference in oil return back pressure and improving accuracy

Active Publication Date: 2015-08-19
XCMG FIRE FIGHTING SAFETY EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

[0008] As a result, the complexity of pipeline assembly is greatly increased, and the manufacturing cost of the system is also high; in addition, the explosion-proof control valve is a flow control valve, which will further cause the difference in back pressure of the left and right return oil due to various errors

Method used

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  • Dual Hydraulic Cylinder Synchronous Control System and Construction Machinery Applying the Control System
  • Dual Hydraulic Cylinder Synchronous Control System and Construction Machinery Applying the Control System
  • Dual Hydraulic Cylinder Synchronous Control System and Construction Machinery Applying the Control System

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Embodiment Construction

[0030] The core of the present invention is to provide a dual hydraulic cylinder synchronous control system, which can ensure the synchronism of the dual hydraulic cylinders and effectively control the manufacturing cost of the system through the optimization of component configuration. The present embodiment will be described in detail below in conjunction with the accompanying drawings.

[0031] Without loss of generality, this implementation mode takes the jib luffing cylinder of the crane as the main body for detailed description. It should be understood that the jib luffing cylinder does not constitute a limit to the technical solution of this application, and the dual hydraulic cylinder synchronous control system can be applied to Any actuation system employing two hydraulic cylinders.

[0032] See image 3 , which is the working principle diagram of the double luffing cylinder synchronous control system described in this embodiment.

[0033] Same as the prior art, the...

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Abstract

The invention discloses a double hydraulic cylinder synchronous control system comprising a direction control valve and two back pressure valves, wherein the direction control valve is used for controlling telescopic operations of two hydraulic cylinders; the two back pressure valves are respectively and fixedly arranged on the two hydraulic cylinders; the pilot opening pressure of one back pressure valve is larger than that of the other back pressure valve; during extension, oil charging branches and oil return branches of the two hydraulic cylinders are connected in parallel; during retraction, the oil charging branches of the two hydraulic cylinders are connected in parallel, the oil return branches of the two hydraulic cylinders are connected in series, and the series connection is formed from the back pressure valve with the small pilot opening pressure to the back pressure valve with the large pilot opening pressure. The double hydraulic synchronous control system disclosed by the invention can effectively control the manufacturing cost of the system based on guarantee of synchronous control precision; and hereby, the invention further provides an engineering machine applying the control system.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to a dual hydraulic cylinder synchronous control system and construction machinery using the control system. Background technique [0002] The hydraulic synchronization system is an eternal technical topic in the application practice of hydraulic technology. On the one hand, it ensures the accuracy of the execution operation, and on the other hand, it improves the safety and reliability of the mechanism execution. At present, based on the changes in the lifting performance of new models, there are many executive systems using dual hydraulic cylinders, such as the luffing mechanism, super-lifting mechanism and winch locking ratchet mechanism of the crane. [0003] With the increase of the lifting tonnage, the load of each executive system will increase to varying degrees, and at the same time, the structural size and range of motion of the mechanism will increase accor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/06B66C23/82
Inventor 孔德美卢良卫袁少震
Owner XCMG FIRE FIGHTING SAFETY EQUIP CO LTD
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