Compressor unit exhaust circulation backflow structure

By increasing the inner diameter of the downstream pipe of the recirculation valve and setting a mixing structure, combined with a resistance silencer, the problems of intake pressure and temperature fluctuations and vibrations caused by the exhaust recirculation of the compressor unit were solved, and the stable operation of the compressor unit was achieved.

CN224496763UActive Publication Date: 2026-07-14THE 711TH RES INST OF CHINA STATE SHIPBUILDING CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
THE 711TH RES INST OF CHINA STATE SHIPBUILDING CORP
Filing Date
2025-05-22
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The existing compressor unit's exhaust recirculation structure is prone to causing a sudden increase in intake pressure and temperature during recirculation, which may lead to alarms or shutdowns. In addition, the pipeline vibrates severely, resulting in unstable control.

Method used

By increasing the inner diameter of the downstream pipeline of the recirculation valve and setting a mixing structure at the point where the recirculated gas converges into the intake preheater, combined with a resistance silencer at the compressor main exhaust port, the uniform mixing of the recirculated gas and the intake gas is controlled, reducing the flow rate and pulsation.

Benefits of technology

Stable control of intake pressure and temperature was achieved, avoiding abnormal alarms and shutdowns, reducing pipeline vibration, and ensuring stable operation of the compressor unit across a wide range of operating conditions.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224496763U_ABST
    Figure CN224496763U_ABST
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Abstract

A compressor unit exhaust circulation backflow structure, the compressor unit includes unit intake pipeline, unit exhaust pipeline, intake preheater and compressor main machine, the intake preheater is located between unit intake pipeline and the air inlet of compressor main machine.Intake preheater is arranged between unit intake pipeline and the air inlet of compressor main machine.The compressor unit exhaust circulation backflow structure includes circulation backflow valve, backflow valve upstream pipeline and backflow valve downstream pipeline, the inlet end of backflow valve upstream pipeline is communicated with unit exhaust pipeline, the outlet end of backflow valve upstream pipeline is communicated with the inlet of circulation backflow valve, the inlet end of backflow valve downstream pipeline is communicated with the outlet of circulation backflow valve, the outlet end of backflow valve downstream pipeline is communicated with unit intake pipeline, and the inner diameter of backflow valve downstream pipeline is greater than the inner diameter of backflow valve upstream pipeline.The utility model discloses when opening circulation backflow valve makes that the hot air of compressor main machine exhaust end backflows to air intake end, will not cause high or high air intake temperature and alarm even interlock shutdown, also will not cause air intake temperature fluctuation.
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