Hydraulic plunger pump variable displacement control structure and control method thereof

摘要

A hydraulic plunger pump variable displacement control structure (100) and a control method thereof, wherein the hydraulic plunger pump variable displacement control structure (100) comprises a valve body (1), a main valve body (2), and a main valve sleeve (3). ), A spring load assembly (4) for supplying a reverse preload is provided at one end of the main valve body (2), a pilot valve body (6) is provided at the other end, and a main valve sleeve (3) is provided. Is connected to a feedback lever (5) connected to a variable displacement piston pump, a valve sleeve (7) is provided outside the main valve body (2), and a pilot valve body (6) is pushed by hydraulic oil. Then, by moving while overcoming the preload of the spring load assembly (4), the main valve body (2) is pushed so as to move, and the moved main valve body (2) and the valve sleeve (7) are relatively displaced. do it Controlling hydraulic fluid to flow into the variable displacement piston pump, when the variable capacitance piston pump moves, pushing the main valve sleeve (3) to move in a direction opposite to the direction of movement of the main valve body (2).