Reverse Bucket Ridge Structure for Smooth Marine Reverse Thrust
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Solution Overview
Problem
Existing jet propulsion devices for marine vessels face inefficiencies in enhancing backward moving performance due to stagnant or forcibly guided water currents, which hinder optimal discharge and propulsion efficiency.
Innovation Solution
The reverse bucket design includes a vertical ridge line separating first and second inlet regions, with guide and outlet regions forming recess portions that efficiently guide and discharge water to the left and right, eliminating cylindrical configurations that cause stagnation or forced guidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If water is discharged through a cylindrical portion in existing reverse buckets, then the structure is simple and easy to manufacture, but the water current becomes stagnant or forcibly guided, reducing backward moving performance
Solution Approach 1:
The reverse bucket is divided into multiple functional regions: a reception region for receiving water from the deflector, a guide region for guiding water flow, and a discharge region for discharging water. This segmentation allows each region to perform its specific function optimally, preventing water stagnation and forced guidance while maintaining efficient backward movement.
Solution Approach 2:
The invention transitions from a two-dimensional cylindrical portion to a three-dimensional configuration with distinct reception, guide, and discharge regions. The guide region creates a controlled flow path that directs water smoothly from the reception region to the discharge region, utilizing spatial dimensionality to eliminate stagnation and improve water current guidance.
2Ease of operation
If water current is forcibly guided in existing reverse buckets, then the structure can direct water flow, but the forced guidance creates inefficiency and reduces propulsion performance
Solution Approach 1:
The guide region is designed with a curved surface that dynamically adapts to the water flow, guiding it smoothly from the reception region to the discharge region. This dynamic design allows the water current to follow the guide region's contour naturally, providing effective direction control without forced guidance, thereby maintaining high propulsion efficiency.
3Device complexity
If water hits the hull or is re-sucked in, then the discharge opening position may be insufficiently considered, but this reduces propulsion efficiency and backward moving performance
Solution Approach 1:
The discharge region is positioned and oriented in advance to ensure that discharged water is directed away from the hull and away from the water intake path. This preliminary consideration of discharge location and direction prevents water from hitting the hull or being re-sucked in, maintaining propulsion efficiency without requiring complex additional positioning mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the backward moving performance of marine vessels by ensuring smooth water flow and efficient discharge, reducing the likelihood of water hitting the hull or being re-sucked in, thereby improving propulsion efficiency.
Implementation Method 1
a jet propulsion device that includes a deflector, which changes a direction of water discharged from a nozzle to the left or the right, and a reverse bucket, which is positioned behind the deflector when moving the marine vessel backward so as to change the direction of the water current
Implementation Method 2
a reverse bucket for a jet propulsion device includes a vertical ridge line that faces a discharge opening of a deflector in a backward moving posture to make a marine vessel move backward
Data Source
AI summary
A reverse bucket for a jet propulsion device includes a vertical ridge line that faces a discharge opening of a deflector to make a marine vessel move backward, a first inlet region and a second inlet region separated by the ridge line to receive water discharged from the discharge opening, first and second outlet regions to discharge the water received by the first and second inlet regions to the outside, and first and second guide regions to guide the water received by the first and second inlet regions to the first and second outlet regions. The first inlet region, the first guide region, and the first outlet region define a first recess portion including a first opening that faces the discharge opening. The second inlet region, the second guide region, and the second outlet region define a second recess portion including a second opening that faces the discharge opening.