Multi-stage Pump Assembly Redundant Flanged Connections
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Solution Overview
Problem
High-pressure pumping systems face inefficiencies and potential failure due to compromised threaded connections between the pump housing and head/base components, which can separate under elevated fluid pressures, leading to decreased performance or complete failure.
Innovation Solution
The implementation of external flanged connections as redundant connections to back up internal threaded connections between the pump head, base, and housing, providing increased resistance to failure and enhancing the structural integrity of the pump assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded connections are used to connect the housing to the head and base, then the assembly is simple and compact, but the connections are compromised under high pressure causing separation
Solution Approach 1:
The connection system is divided into two independent parts: internal threaded connections for basic assembly and external flanged connections for high-pressure support. This segmentation allows each connection type to perform its specialized function, with the flanged connections providing additional strength without interfering with the threaded connections.
Solution Approach 2:
The connection system transitions from a single-dimensional threaded interface to a dual-dimensional system by adding external flanged connections that wrap around the housing. This adds a circumferential dimension to the connection, distributing stress more effectively and providing redundant support against high internal pressures.
2Area of stationary object
If the housing is made compact with flush-mounted head and base, then the overall size is reduced, but the threaded connections have insufficient engagement area under high pressure
Solution Approach 1:
The external flanged connections are nested around the housing in a concentric arrangement, with the flange plates positioned outside the housing and bolted through the housing wall. This nesting approach provides extensive connection area without increasing the overall footprint of the pump assembly, maintaining a compact shape while enhancing connection strength.
3Reliability
If external flanged connections are added as redundant connections, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The external flanged connections serve multiple functions: they provide structural reinforcement against high pressure, act as a backup connection system if threaded connections fail, and offer a standardized interface for maintenance and assembly. This multi-functionality justifies the additional complexity by delivering disproportionate reliability benefits.
Data Source
AI summary
A pump assembly for use within a high pressure pumping system includes housing, a head and a base. The housing contains at least one centrifugal pump stage. The head and base are attached to the housing with corresponding internal threaded connections. The head and base are further retained to the housing with corresponding external flanged connections. The external flanged connections provide redundant connections that reduce the risk of separation between the housing and the head and base.