Programmable integrated control system capable of controlling inlet and outlet oil ways independently

Abstract

The invention discloses a programmable integrated control system capable of controlling inlet and outlet oil ways independently. The programmable integrated control system comprises an integrated hydraulic valve, a controller, an active input device, a hydraulic actuator, a hydraulic oil source and a hydraulic oil tank. The integrated hydraulic valve comprises five two-position two-way electro-hydraulic proportional valves and is connected with a bridge-type circuit through a hydraulic pipeline. The active input device is connected with the controller through a circuit, and the controller is connected with the integrated hydraulic valve through a circuit; the hydraulic actuator is connected with the integrated hydraulic valve through a pipeline, and the integrated hydraulic valve is connected with the hydraulic oil source and the hydraulic oil tank through pipelines. The programmable integrated control system has high efficiency and response performance and is simple in structure and easy to achieve; the integrated hydraulic valve is simple in design, convenient to machine, good in interchangeability and capable of meeting the requirements of different types of hydraulic actuators and has various variable median functions, and a valve element is easy to design and machine.

Description

technical field [0001] The invention relates to a programmable integrated control system, in particular to a programmable integrated control system with independent control of inlet and outlet hydraulic oil circuits. Background technique [0002] In the traditional valve-controlled hydraulic system, a four-way valve with "one-to-one control" is generally used to control a hydraulic actuator. Since the spools of the four-way valve are mechanically connected together, this causes the spool to move under the excitation of the control signal after the four-way valve receives the control signal, and the movement of the spool simultaneously changes the inlet and outlet oil The throttling area of ​​the circuit controls the flow into and out of the hydraulic actuator. Valve-controlled hydraulic systems generally include symmetrical valve-controlled symmetric cylinders or motors, asymmetric valve-controlled symmetric cylinders or motors, symmetric valve-controlled asymmetric cylinde...

AI Technical Summary

Problems solved by technology

However, in the symmetric valve-controlled asymmetric cylinder hydraulic system, because the area ratio of the oil inlet chamber and the oil outlet chamber of the asymmetric cylinder is not equal and not unique, the inlet and outlet flow rates are not equal, and the ratio is equal to Area ratio of inlet and outlet chambers

Because in the "one-to-one control" where a four-way valve controls a hydraulic actuator, the spool of the four-way valve controls the flow of the inlet and outlet oil circuits at the same time, regardless of whether it is a symmetrical valve controlling an asymmetrical cylinder or an asymmetrical valve. In the hydraulic system of the valve-controlled asymmetric cylinder, the movement of the spool can only satisfy the flow into or out of one of the two oil circuits of the hydraulic actuator, thus resulting in low efficiency and low response performance of the hydraulic control system

Usually, during the design and processing of four-way valves, it is necessary to process symmetrical valves and asymmetrical valves suitable for different types of hydraulic actuators according to requirements, resulting in poor interchangeability of hydraulic valves and difficulties in the design and processing of valve cores, etc.

Images