A serviceable nacelle structure

The modular, maintainable pod structure solves the problems of lubricating oil leakage and seawater intrusion after damage to the rotating seal of the pod propulsion unit. It enables the disassembly, maintenance, and replacement of the marine propulsion module, meets environmental protection requirements, and reduces maintenance costs.

CN117622424BActive Publication Date: 2026-07-14WUHAN INSTITUTE OF MARINE ELECTRIC PROPULSION (THE 712TH RESEARCH INSTITUTE OF CHINA STATE SHIPBUILDING CORP LTD)
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Patent Information

Application Number
CN202311626542.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-30
Publication Date
2026-07-14
Estimated Expiration
2043-11-30

AI Technical Summary

Technical Problem

The propulsion rotary seal of podded propulsion systems is prone to damage, leading to lubricating oil leakage and seawater intrusion. This makes repairs difficult at sea, affects the ship's propulsion function, and causes environmental pollution.

Method used

It adopts a modular, maintainable pod structure, including an inner cavity sealing assembly, an outer cavity sealing assembly, a bearing assembly, an outer cavity airbag assembly, and a sealing maintenance and support assembly, enabling the disassembly, maintenance, and replacement of the propulsion module.

Benefits of technology

The ability to disassemble, maintain, and replace the rotary seal of the propulsion module at sea avoids oil leakage and seawater intrusion, ensuring compliance with environmental emission requirements and reducing maintenance costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a maintainable pod structure, which comprises a pod, inner cavity sealing assemblies arranged at a driving end and a non-driving end of the pod respectively, a bearing assembly, an outer cavity sealing assembly and an outer cavity air bag assembly arranged at the driving end of the pod, and a sealing maintenance guarantee assembly, which can realize the limiting of a stator and a rotor when the outer cavity sealing assembly is extracted for maintenance, and can provide the extraction and plug-in recovery function of the outer cavity sealing assembly and the bearing assembly; the structure of the application can guarantee the replacement and maintenance of the rotating sealing of a propelling module of the pod at sea, saves the cost of the ship in the dry dock for maintenance, and improves the maintainability of the pod.
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Citation Information

Patent Citations

  • Pod drive

    CN102159456A

  • Cooling arrangement for a propulsion unit

    US20150329191A1