A Closed Oil Film Visualization Device for Measuring Leakage of Reciprocating Seal Pistons

Abstract

The invention discloses a closed oil film visualization device capable of measuring leakage of a reciprocating sealing piston. The device comprises a tabletop visualization mechanism and an oil supply system, wherein the tabletop visualization mechanism comprises a top plate, a base frame, a linear actuator, a pull pressure sensor, a piston and a transparent cylinder; lower leaked liquid detecting components are arranged around the bottom of the piston; an upper leaked liquid height detecting component and a microscope observation component are arranged on the side wall of the base frame; a vertical oil way and a horizontal oil way are arranged in the piston; the two ends of the horizontal oil way penetrate through the side wall of the piston; the vertical oil way is connected and communicated with the upper leaked liquid height detecting component; an annular groove is peripherally formed in the middle part of the piston to serve as an oil closed cavity to be connected to the oil supply system; and gaps are formed in the side surface of the piston and the inner wall of the transparent cylinder. The device solves the technical difficulties in a traditional device, supplies stable liquid pressure, guarantees the bearing capacity and the service life of a glass cylinder, and detects the sealing leakage quantity or the magnitude of pumping back quantity.

Description

technical field [0001] The invention belongs to the field of hydraulic reciprocating seals, and in particular relates to a closed oil film visualization device capable of measuring the leakage of a reciprocating seal piston. Background technique [0002] In recent years, with the rise of my country's aircraft projects, related supporting research and experimental work has also begun. Hydraulic actuators are the main actuators on aircraft, and the performance of their dynamic seals is very important for the safety of actuators and systems. Reliability, maintainability and longevity have a major impact. [0003] Aiming at the goal of "high reliability, long life, and quasi-prediction" of the current and future advanced aircraft hydraulic systems, it is necessary to carry out the mechanism research of fluid reciprocating dynamic seals, and the sealing performance is directly related to the state of the oil film on the sealing interface, the thickness distribution of the oil film...

AI Technical Summary

Problems solved by technology

Because the processing of the oil inlet and outlet on the transparent glass has a great influence on the strength of the glass, the existing reciprocating sealing visualization device is generally an open system, which cannot provide definite liquid pressure conditions, and the existing reciprocating sealing oil film visualization device does not detect the actuator piston. The quantitative relationship between the state of the oil film in the sealing area, the liquid pressure in the actuating chamber and the leakage of the seal cannot be obtained

Therefore, the existing sealing oil film visualization device does not consider the influence of liquid temperature on the film formation of sealing oil film

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