An oil circuit control structure for variable pitch of a propeller of a Z propeller

By designing an oil circuit control structure, including the propeller, casing, piston, check valve, and distribution shaft, the instability problem of the propeller pitch system during power failure was solved, and stable control of the propeller was achieved under emergency conditions.

CN224546265UActive Publication Date: 2026-07-24WUXI LIPUSI INTELLIGENT SHIP TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WUXI LIPUSI INTELLIGENT SHIP TECH CO LTD
Filing Date
2025-09-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Traditional variable pitch propeller systems are prone to pressure instability within the guide structure when power is lost, leading to unstable propeller direction changes.

Method used

Design an oil circuit control structure, including a propeller, a housing, a piston, a check valve, and a distribution shaft. By controlling the flow of hydraulic oil into the distribution shaft, the piston can move stably, ensuring that the propeller remains stable in the event of a sudden power failure.

Benefits of technology

Even in the event of a sudden power outage, the hydraulic oil will not flow backward, maintaining the stability of the propeller and ensuring stable adjustment of the propeller under both positive and negative pitch conditions.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of oil circuit control structure for full-revolving propeller propeller pitch variation, it is related to propeller oil circuit control technical field, including propeller, shell, piston, check valve and oil distribution shaft;Propeller is installed on shell, piston, check valve and oil distribution shaft are all installed in shell, and oil distribution shaft one end is connected with the one end of check valve, the other end of check valve is connected with piston.The utility model is through the cooperation structure of the setting oil distribution shaft, check valve and piston, by controlling the first passage and second passage of oil distribution shaft in the flow into hydraulic oil, according to the hydraulic oil inflow first cavity or second cavity, and then can realize control piston left or right movement, even if emergent power failure occurs, hydraulic oil also cannot backflow, keep the stability of propeller.
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