Pressure balance type liquid filling pipeline secondary sound source limiting protection structure

By designing a pressure-balanced filling pipeline secondary sound source limiting protection structure, pressure balance on both sides of the piston and protection of the actuator are achieved, solving the problem of easy structural damage of the filling pipeline system under high pressure conditions, and improving response speed and noise reduction effect.

CN122170296APending Publication Date: 2026-06-09NAVAL UNIV OF ENG PLA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NAVAL UNIV OF ENG PLA
Filing Date
2026-04-28
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Under high-pressure conditions, the secondary sound source structure of the liquid filling pipeline system has weak pressure resistance, which makes the actuator easy to be damaged and difficult to maintain stable mechanical performance.

Method used

A pressure-balanced liquid filling pipeline secondary sound source limiting protection structure was designed. The piston assembly and pressure balancing chamber achieve pressure balance on both sides of the piston. Combined with the limiting block and spring protection actuator, the piston is driven by piezoelectric ceramic to form a secondary sound source for active noise reduction.

Benefits of technology

It effectively reduces actuator load, improves response speed and control accuracy, extends service life, adapts to high-pressure liquid filling pipeline conditions, and has a stable and reliable noise reduction effect.

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Abstract

This invention belongs to the field of silencers and relates to a pressure-balanced secondary sound source limiting and protection structure for liquid-filled pipelines. Low-frequency noise is a prominent problem in liquid-filled pipeline systems. While piston-type active silencing technology has significant advantages, existing secondary sound sources have weak pressure resistance, and actuators are prone to damage, making stable operation difficult. This invention features a tubular inner cavity and a piston cavity, equipped with a piston assembly and actuator. The main body includes a pressure-balancing chamber connecting all piston cavities, through which fluid is introduced to equalize the pressure before and after the piston. The design can also optimize the fluid inlet / outlet, connectors, V-shaped pipes, flanges, arrayed piston cavities, and limiting blocks. The actuator incorporates piezoelectric ceramics and springs, and its structural parameters meet specific matching relationships. This invention balances piston pressure, reduces actuator load, improves response and accuracy, protects the actuator through limiting and spring parameters, extends its lifespan, has a compact and reliable structure, is suitable for high-pressure liquid-filled pipelines, and provides more stable noise reduction and protection effects.
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