Synchronous hydraulic control device

Abstract

The invention discloses a synchronous hydraulic control device, and relates to the technical field of hydraulic control. The synchronous hydraulic control device comprises a three-position four-way electromagnetic valve, a hydraulic control one-way valve, a two-position four-way electromagnetic valve, a synchronous cylinder, a first valve, a second valve, an electromagnetic relief valve, a first port, a second port, a third port, a fourth port, a fifth port and a six port, wherein the first port, the second port and the third port are used for being connected with a hydraulic source, and the fourth port, the fifth port and the six port are used for being connected with a first driving hydraulic cylinder and the second driving hydraulic cylinder. The synchronous cylinder includes a first cylinder body, a second cylinder body, a movable rod body disposed between the first cylinder and the second cylinder in a penetrating mode, a first piston and a second piston, wherein the first pistonand the second piston are connected to the rod body. The first piston divides the first cylinder body into a first cavity and a second cavity, and the second piston divides the second cylinder body into a third cavity and a fourth cavity. The synchronous hydraulic control device is able to adopt conventional hydraulic components to achieve a multi-cylinder synchronous motion by using simple electrical control.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a hydraulic synchronous control device. Background technique [0002] The existing hydraulic synchronization technology generally adopts synchronous motor or closed-loop control. The synchronous motor is a rigid synchronization of the motor speed of each stream. Due to the objective mechanical error and the unevenness of the load, as the use time increases, the synchronous motor will produce accumulated errors, so the error cannot be automatically eliminated by itself. In addition, as the amount of wear of the motor increases, its synchronous performance will also decrease, but manual intervention cannot be performed, so the production of the controlled device or system will not be able to continue during production and use. [0003] Although the closed-loop control can achieve high synchronization accuracy, it has high requirements on the response of the valve, the ac...

AI Technical Summary

Problems solved by technology

The synchronous motor is the rigid synchronization of the motor speed of each stream. Due to the objective mechanical error and the unevenness of the load, as the use time increases, the synchronous motor will produce accumulated errors, so the error cannot be automatically eliminated by itself.

In addition, as the wear of the motor increases, its synchronous performance will also decrease, but manual intervention cannot be performed, so the production of the controlled device or system will not be able to continue continuously during production and use.

[0003] Although closed-loop control can achieve high synchronization accuracy, it has high requirements for the response of the valve, the accuracy of the valve and the accuracy of the oil, which leads to a high cost

At the same time, the closed-loop control will inevitably use the position sensor, and the protection of the position sensor and its use environment also have higher requirements, and the working conditions of high temperature and humidity will be greatly restricted

In addition, the core component in the closed-loop control is the electrical PLC, but the deadliest component is also the electrical PLC, so once it is powered off or the electrical PLC fails, the entire device will not work

Images