Centrifugal Pump Housing with Grouped Connection Means
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Solution Overview
Problem
Centrifugal pumps used for dredging face issues with wear and structural integrity due to extreme conditions, with existing wear-resistant materials being brittle and unsuitable for construction, leading to potential deformation and stress on the pump housing.
Innovation Solution
A pump housing design featuring a circumferential wall with connection means distributed in groups along the circumference, including bolt receiving structures and reinforcing ribs, to enhance stiffness and strength, and a manufacturing method that positions these connection means to minimize bending moments and facilitate efficient casting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wear-resistant materials are used for the pump housing, then durability against wear is improved, but the materials become brittle and unsuitable for construction
Solution Approach 1:
The patent uses composite construction by combining wear-resistant material (such as white cast iron) for the circumferential wall with reinforcement elements (ribs and加强 parts) to achieve both wear resistance and structural integrity. This allows the pump housing to withstand both wear and mechanical stresses without deformation.
2Strength
If connection means are positioned to withstand high pressure, then structural strength is improved, but bending moments cause deformation of the circumferential wall
Solution Approach 1:
The patent divides the circumferential wall into segments by adding ribs and reinforcement elements at strategic locations. This segmentation allows the wall to better distribute and resist bending moments from connection means, preventing deformation while maintaining pressure resistance.
Solution Approach 2:
The patent applies local reinforcement by adding ribs and加强 parts at specific locations where connection means are positioned. This local quality enhancement allows the circumferential wall to withstand high pressures and bending moments without overall deformation.
3Strength
If the pump housing is made stronger and stiffer, then performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the reinforcement elements (ribs and加强 parts) directly into the circumferential wall structure during the casting process. This integration allows the pump housing to be manufactured as a single piece with built-in strength, avoiding additional manufacturing steps and maintaining efficiency while achieving enhanced strength.
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 results in a stronger, stiffer pump housing that withstands high pressures and reduces stress, improving the pump's performance and manufacturing efficiency while using wear-resistant materials effectively.
Implementation Method 1
the connection means are positioned in groups along the circumference of the pump housing... to minimize bending moments
Implementation Method 2
High loads may be transferred via connection means 22. From FIG. 2 it can be seen that these loads may introduce a bending moment in the circumferential wall 3
Implementation Method 3
the pump casing comprises a central opening to form an axial supply of the pump housing for material to be pumped, the circumferential wall closing the pump housing along an outer circumference of the pump housing
Implementation Method 4
Between the rotor blades 15, the mass to be pumped is forced radially outward into the pump housing 2 under the influence of centrifugal forces
Data Source
AI summary
The pump housing (2) includes a circumferential wall (3), a pump casing (20) and a shaft cover (40). The pump casing (20) is attached to the circumferential wall (3) by a plurality of connection elements. The pump casing (20) includes a central opening (27) to form an axial supply (14) of the pump housing (2) for material to be pumped. The circumferential wall (3) closes the pump housing (2) along its outer circumference. The pump (1) includes a plurality of connection elements (22) connecting the pump casing (20) to the circumferential wall (3). The connection elements (22) are positioned in groups along the circumference of the pump housing (2), wherein the groups are regularly distributed along the circumference of the pump housing (2).