Smooth High-speed Movement Of The Cylinder, The Regulator Components

The pneumatic automatic system is one of the main methods to realize transmission and control. The pneumatic control circuit, which is consisted of the pressure regulator component, the direction valve and the cylinder, is the most commonly used circuit in the industrial automation. In the applications, where the devices need to run in high speed to push a load, the cylinder with big diameter is needed. Therefore, how to stabilize the input pressure of the cylinder by improving the control circuit is become critical in assuring the normal movement of the devices. To meet this actual requirement, by studying the regular rule of the pressure about the pressure regulator, an economical and effective pneumatic control circuit is studied to maintain the stable movement of the cylinder in high speed in the paper. The research of the paper will be practical and applicable in the control of the stable movement in high speed about the cylinder with heavy load.In the paper, a control circuit which is called "the flow compensation adds buffer tank" is proposed. In the circuit, an electromagnetic valve is connected in parallel to the pressure regulator. The switch of the valve can realize the flow compensation, and at the same time, a buffer tank is add between the direction valve and the regulator. The related theoretical and experimental research is then conducted in the paper. The main researches include: (1) the mathematical model of "the flow compensation adds buffer tank" is builded; (2) the simulation model of "the flow compensation adds buffer tank" is then studied. The output pressure curve of the pressure regulator by simulation in the pressure scheme can be a reference for the setting of the flow compensation time; (3) according to the different schemes, the experimental study about the control loop of "the flow compensation adds buffer tank" is conducted.The results showed that, by applying "the flow compensation adds buffer tank" control circuit, the outlet pressure declined from the original 22.5 % to 4 %, and the average speed of the cylinder increased 27.1 %. So the stable movement of the cylinder in high is ensured.