Belt Driven Axial Flow Pump with Transverse Access
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Solution Overview
Problem
Existing anti-heeling pump systems for ships are difficult to service due to space constraints and design limitations, making maintenance challenging and limiting the versatility of the pumps, particularly in terms of speed variation and high-pressure operations.
Innovation Solution
A pump housing design featuring a closed loop driving belt and a secondary transverse passage allows for easy access and replacement of internal components, with a drive transmission structure that enables speed control of the pump axle and accommodates high-pressure operations by using a bulbous outer housing and dynamic axle seals, allowing for efficient use of space and reduced flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the pump is designed with a compact housing to save space in the engine room, then space utilization is improved, but accessibility for maintenance and service becomes difficult
Solution Approach 1:
The pump housing is divided into two separable parts: a first part containing the drive transmission structure and a second part containing the pump axle and impeller. This segmentation allows the housing to be compact when assembled while enabling easy disassembly for maintenance, resolving the contradiction between space savings and service accessibility.
2Device complexity
If the pump housing is designed as a single integrated unit to simplify structure, then device complexity is reduced, but accessibility for component replacement is worsened
Solution Approach 1:
The housing is segmented into two parts that can be separated along a separation plane. The first housing part contains the drive transmission structure while the second housing part contains the pump axle and impeller. This segmentation provides straightforward access to internal components for replacement and maintenance while maintaining overall structural simplicity.
3Stress or pressure
If the pump is designed for high-pressure operation with reduced flow passage area, then pressure capability is improved, but flow resistance increases
Solution Approach 1:
The pump housing features a bulbous shape that extends in the axial direction between the pump ends. This dimensional extension allows the flow passage cross-sectional area to be maintained at levels comparable to connected piping, reducing flow resistance and energy losses while still achieving high-pressure operation capability.
4Ease of operation
If the belt engagement point is located close to the axle end to simplify belt installation, then ease of operation is improved, but bearing load imbalance increases
Solution Approach 1:
The drive transmission structure is extracted as a separate, releasably mounted component coaxially around the pump axle. This allows the belt engagement point to be optimally positioned for balanced bearing loads while maintaining ease of belt installation and replacement. The drive transmission structure can be removed and replaced independently to optimize both installation ease and load distribution.
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
The design facilitates easier maintenance, reduced space usage, and improved versatility by allowing quick component replacement and speed control, enhancing the operational efficiency and reliability of the anti-heeling pump system.
Implementation Method 1
a belt driven axial flow pump with pulley between two bearings... a driving belt engaging a drive transmission structure
Data Source
AI summary
The invention relates to a ship's anti heeling pump (20) comprising an outer housing (H, 30) and an inner housing (60) inside said outer housing(H, 30), a flow passage (22) between said outer housing (H, 30) and said inner housing (60) extending between ends (24, 25) of said pump(20), a portion of an axle(100) extending inside said inner housing (60), said axle (100) carrying a least one impeller (105) for establishing a flow of a liquid along said flow passage(22), a drive transmission structure(90) in said inner housing (60) being connected with or integral with said axle(100), said outer housing (H, 30) defining together with said inner housing (60) a second passage (80) separate from said flow passage (22), said second passage (80) extending generally transversally to said axle (100), said second passage(80)communicating with the outside of said outer housing (30) at at least one opening (82) and extending around said drive transmission structure (90) opposite to, or essentially opposite to, said opening (82).