Design and simulation of hydraulic system of pitch propeller seal test platform

A test bench for testing the sealing performance of pitching paddle is designed, which can perform pressure test on the main sealing parts such as transom and paddle hub. The piston of the digital hydraulic cylinder is connected in series with the piston of the piston of the piston cylinder, and the displacement of the piston of the piston cylinder is controlled by controlling the displacement of the digital hydraulic cylinder, which in turn controls the pressure in the experimental chamber. Simulation study of its hydraulic circuit using AMESim simulation software. The experimental results show that the system can accurately load experimental cavities of different volume sizes, and hold pressure for a certain period of time after loading is completed according to the requirements. Determine whether the sealing performance meets the requirements by comparing the pressure change before and after holding pressure. The device improves detection accuracy and efficiency and guarantees the safety of the shipping process.