Pressure-auto-balance hydrodynamic noise silencer

Abstract

The invention aims to provide a pressure-auto-balance hydrodynamic noise silencer comprising an inner perforated tube, an end face flange and a barrel casing. The end face flange is respectively hermetically connected with the inner perforated tube and the barrel casing to form a cavity. A compressible elastic component is filled in the cavity. One end of the inner perforated tube is connected with an inlet tube, and the other end of the inner perforated tube is connected with an outlet tube. The inner perforated tube is provided with perforated holes. The pressure-auto-balance hydrodynamic noise silencer is compact in structure, and can automatically balance along with changes of system static pressure during working, and a conventional energy accumulator inflating and deflating device is omitted. Besides, the noise silencer combines advantages of a resistant noise silencer and an energy accumulator, and is high in adjustability of silencing frequency and capable of effectively suppressing broadband hydrodynamic noise.

Description

technical field [0001] The invention relates to a muffler, in particular to a muffler for suppressing hydrodynamic noise of a piping system. Background technique [0002] Pipeline systems are common devices in various fields of the national economy and in daily life, such as domestic water pipelines and cooling water pipelines, which are commonly found in various ships, but the vibration and noise of water pipelines have not been well controlled so far However, how to reduce the noise of the pipeline system is still a problem that plagues people. [0003] The impact of liquid-filled pipeline noise is that the noise inside the pipeline radiates outward through the pipe wall and radiates directly to the environment at the exit, which has a great impact on people's work and life. The pressure pulsation also directly leads to the stress pulsation and mechanical vibration of the pipeline, especially when the pulsation frequency is close to the natural frequency of the pipeline s...

AI Technical Summary

Problems solved by technology

[0006] The design of the liquid muffler with resistant noise-absorbing structure has the following difficulties: First, when the frequency is constant, the wavelength of the sound wave in the liquid medium is more than four times larger than that in the air. The installation space is restricted; secondly, the sound-absorbing and sound-insulating materials commonly used in the air medium are basically sound-permeable in the liquid medium, and the water-liquid medium muffler should not be designed according to the perforated structure often used in the design of the air muffler

[0007] The accumulator is used to attenuate the pressure pulsation from the load system. The installation of the accumulator can effectively reduce the fluid pulsation and noise in the pipeline. Hydrodynamic noise, and for the use environment where the static pressure of the system changes, the accumulator needs an additional charging and discharging device to balance the static pressure of the system, which further increases its volume, increases the complexity of its structure, and limits its Applications in Confined Space

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