Centrifugal Pump Axially Offset Terminal Compartment Tool Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing centrifugal electric pump designs face challenges in easily fixing and removing the motor casing due to the tight maneuvering space caused by an axially offset terminal strip compartment, which complicates the operation and requires cumbersome screw insertion.
Innovation Solution
A centrifugal electric pump assembly with an axially offset terminal strip compartment featuring a hole that extends through the compartment and/or shell in the same direction as the fixing elements, allowing for easier insertion of tools and removal of fixing elements, and a recess on the surface for rotating the assembly without interference with the pump body flanges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the terminal strip compartment is arranged axially offset to meet manufacturing requirements, then the electrical connection is achieved, but the maneuvering space for screw insertion becomes tight and the fixing operation becomes complicated
Solution Approach 1:
A tool access hole is introduced as an intermediary element that mediates between the tight maneuvering space and the screw insertion operation. The hole allows screwdrivers or other tools to pass through the compartment wall, enabling screw insertion without requiring direct access to the tight space between the compartment and pump body.
Solution Approach 2:
The problem of tight maneuvering space in three dimensions is solved by creating an access pathway through the compartment wall. This transforms the access problem from a spatial constraint into a through-wall penetration solution, allowing tool insertion from the opposite side of the compartment.
2Reliability
If the terminal strip compartment has non-negligible dimensions to accommodate the electrical terminal strip, then the electrical connection is secured, but the available space for fixing operations is reduced
Solution Approach 1:
The tool access hole serves as a mediator that allows fixing operations to proceed despite the compartment occupying significant space. By providing an alternative access route through the compartment wall, the hole enables screw insertion without requiring additional maneuvering space that would otherwise be blocked by the compartment's dimensions.
3Strength
If screws are used to fix the motor accommodation casing to the pump body, then a secure connection is achieved, but the insertion and removal of screws becomes cumbersome due to tight space
Solution Approach 1:
The tool access hole acts as an intermediary that enables screw insertion and removal operations. The hole allows screwdrivers to pass through the compartment wall and engage with the screw heads, maintaining the secure connection provided by screws while eliminating the cumbersome manual manipulation required in the tight external space.
Solution Approach 2:
The compartment structure is segmented by introducing the access hole, which divides the compartment wall into separate regions. This segmentation creates a dedicated access pathway that separates the tool insertion function from the overall compartment structure, allowing independent optimization of both the compartment's electrical function and the fixing operation accessibility.
Data Source
AI summary
A centrifugal electric pump assembly includes a pump body formed by a volute and an intake duct and a delivery duct. The pump also includes an electric motor, contained in an accommodation casing, the casing facing with one of its ends the pump body and being fixed to the pump body by means of a plurality of fixing elements; and an electrical box, the electrical box facing the other end of the casing. The casing and the electrical box are contained at least partially within a single shell. The pump further includes a terminal strip, connected to the electrical box and arranged in a compartment which extends from the shell, the compartment being axially offset with respect to the direction of extension of the electric pump. The assembly has at least one hole which passes at least partially through the compartment and/or the shell, the hole being extended in the same direction as a corresponding element for fixing the casing to the pump body.