Fluid Pump Armature Recesses Reduce Flow Impedance
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Solution Overview
Problem
Conventional fluid pumps, such as fuel pumps for motor vehicles, face efficiency issues due to the armature being in the fuel flow path, which increases impedance and energy consumption.
Innovation Solution
The fluid pump design includes an armature with a plurality of recesses at one axial end, reducing impedance and energy consumption by minimizing the armature's obstruction to fluid flow, and features a motor with a stator and windings that rotate the armature to enhance pumping efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the armature is located in the flow path taken by the fuel, then the electric motor can be integrated within the pump housing, but the armature becomes an impedance to the flow of fuel, reducing efficiency and increasing energy consumption
Solution Approach 1:
The invention extracts the armature from the direct fuel flow path by positioning it in a recess that is axially offset from the flow path. The fuel flow path passes through the pump housing and impeller without intersecting the armature, thereby eliminating the impedance effect while maintaining motor integration within the pump housing.
Solution Approach 2:
The invention resolves the spatial conflict between the armature and fuel flow path by utilizing the axial dimension. The armature is positioned in a recess at an axial location that is offset from the radial fuel flow path, allowing both components to coexist without interference in three-dimensional space.
2Device complexity
If the armature is located in the flow path, then motor integration is achieved, but impedance to fuel flow increases, reducing pumping efficiency
Solution Approach 1:
The armature is extracted from the direct fuel flow path and positioned in an axially offset recess. This allows the motor to remain integrated in the pump housing while the fuel flow path through the impeller remains unobstructed, maintaining pumping efficiency.
Solution Approach 2:
By utilizing axial positioning rather than radial positioning, the invention places the armature in a different dimensional plane from the fuel flow path. The recess is located at an axial position where it does not intersect with the radial flow path, allowing both motor integration and efficient pumping to coexist.
3Loss of energy
If the armature is positioned to minimize flow impedance, then energy consumption decreases, but the motor structure becomes more complex with recesses and axial offset positioning
Solution Approach 1:
The invention merges the armature housing with the pump housing into a single integrated component. The recess containing the armature is formed as part of the pump housing structure, eliminating the need for separate armature housings and reducing overall structural complexity despite the axial offset positioning.
Solution Approach 2:
The pump housing serves multiple functions: it contains the pump chamber, forms the armature housing with the recess, and provides structural support for both the pumping mechanism and motor. This multi-functionality reduces the number of separate components needed.
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 increases fluid flow, decreases torque, and reduces energy consumption by minimizing the armature's impact on fluid flow, thereby enhancing the overall efficiency of the fluid pump.
Implementation Method 1
a motor within the fluid pump, the motor having an armature and a stator such that the stator surrounds the armature, wherein one of the armature and the stator includes a plurality of windings which when energized with electricity cause the armature to rotate about an axis
Implementation Method 2
The armature extends axially from a first axial end to a second axial such that a surface of the armature at the first axial end faces toward the pump section and includes a plurality of recesses extending thereinto. The plurality of recesses provides the benefit of reducing impedance provided by the armature to the flow of fuel
Data Source
AI summary
A fluid pump includes a fluid pump inlet and a fluid pump outlet. A motor includes an armature and a stator such that the armature rotates about an axis. A pump section includes a pump section having a pumping element coupled to the armature such that rotation of the armature rotates the pumping element such that the pumping element pumps fluid from the fluid inlet to a pump section outlet of the pump section. A fluid passage within the fluid pump provides fluid communication from the pump section outlet to the fluid pump outlet such that the fluid passage is radially between the armature and the stator. The armature includes a surface of which faces toward the pump section and includes a plurality of recesses extending thereinto.