Control method based on a four-chamber hydraulic cylinder
AssigneeTaiyuan University of Technology
InventorsLong Quan, Tao Liang, Lianpeng Xia, Xiangyu Wang, Lei Ge
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Abstract
An open and closed circuit parallel drive system and a control method based on a four-chamber hydraulic cylinder are provided. The system includes: a closed pump-controlled drive unit and an open valve-controlled drive unit. The four-chamber hydraulic cylinder is driven by the open valve-controlled drive unit with a large load power, and the operating velocity and displacement of the four-chamber hydraulic cylinder are controlled by the closed pump-controlled drive unit with a small load power, thereby improving the linearity and stability of the four-chamber hydraulic cylinder control and reducing the system installed power and throttling loss.
Claims10
An open circuit and closed circuit parallel drive system for a four-chamber hydraulic cylinder, comprising the four-chamber hydraulic cylinder and a hydraulic control system, wherein the hydraulic control system comprises a closed circuit pump-controlled drive unit and an open circuit valve-controlled drive unit,
- wherein a first oil port of the closed circuit pump-controlled drive unit is connected to a second oil port of the four-chamber hydraulic cylinder, and a second oil port of the closed circuit pump-controlled drive unit is connected to a first oil port of the four-chamber hydraulic cylinder;
- and the closed circuit pump-controlled drive unit is configured to drive and control an operating velocity and displacement of the four-chamber hydraulic cylinder with a first load power;
- and
- a first oil port of the open circuit valve-controlled drive unit is connected to a fourth oil port of the four-chamber hydraulic cylinder, and a second oil port of the open circuit valve-controlled drive unit is connected to a third oil port of the four-chamber hydraulic cylinder;
- the open circuit valve-controlled drive unit is configured to drive the four-chamber hydraulic cylinder with a second load power;
- and the second load power is greater than the first load power.
Dependencies are inferred from the claim text.