Double-cylinder hydraulic synchronous erecting system and control method thereof

Abstract

The invention discloses a double-cylinder hydraulic synchronous erecting system. A control system comprises a controller. The controller is connected with two angle sensors in an electrical system in an induction manner. The controller is connected with a rectifier, a first electromagnetic reversing valve and a second electromagnetic reversing valve in a hydraulic system. Angles are collected in real time, a controller can conduct adjustment in real time conveniently, when two hydraulic cylinders have position errors, the automatic control system can send out signals, the opening degree of a proportional valve is adjusted, synchronization is achieved, and due to an adopted balance valve, the influences of pressure fluctuation on the system are greatly relieved. By means of the synchronous erecting system, the purpose of synchronously controlling the two cylinders is achieved from the source through a speed regulating valve loop and an oil supplementing loop. A master-slave driving and classification PID combined control manner is adopted in the synchronous erecting system, and the synchronization precision of the system is greatly improved from the control strategy level. The multiple beneficial effects that the hydraulic control principle of the whole set of system is reasonable and reliable, the electrical control difficulty is low, implementation and operation are simple, and the cost is low are achieved.

Description

technical field [0001] The present invention only relates to the technical field of synchronous erection of hydraulic cylinders, and in particular relates to a dual-cylinder hydraulic synchronous erection system and a control method for improving the accuracy, safety and reliability of the dual-cylinder synchronous control system. Background technique [0002] The existing large-scale critical equipment erection control system has two principle modes: ① Single multi-stage oil cylinder is used for erection. This principle mode has a simple structure, but it is not suitable for the working condition of unbalanced load, and its reliability is poor; ②Two multi-stage cylinders are used for vertical erection, together with a synchronous diverter valve. Although this principle mode realizes the simultaneous erection of two cylinders, its accuracy is low, only about 5%, and the stability is not high, and the safety is poor. Contents of the invention [0003] In view of the pressur...

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Problems solved by technology

[0003] In view of the pressure fluctuation of the multi-stage cylinder existing in the existing technology during the stage change process, it will have a certain impact on the system; when the multi-stage cylinder is erected to a certain angle, the center of gravity of the entire system will exceed 90°. The multi-stage cylinder is in a negative load state. If there are no technical precautions, the multi-stage cylinder will accelerate out of control; during the erection process of the multi-stage cylinder, if the synchronization accuracy is not high, the cumulative error will cause serious damage to the system. Insufficiency

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