Electric Gear Pump Cover Duct Design for Heat Dissipation
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Solution Overview
Problem
Existing gerotor electric gear pumps have inefficiencies in heat dissipation and structural design, leading to increased axial volume and reduced heat flow between electronic components and fuel flow ducts.
Innovation Solution
The design incorporates feed and delivery ducts with both axial and radial sections, where the radial sections project externally from the cover's inset portion, reducing the distance between electronic components and fuel ducts, and featuring dome-like sections for stable fastening, thereby enhancing heat exchange and structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the feed and delivery ducts are configured with axial and radial sections to improve heat exchange, then heat dissipation efficiency is improved, but the axial volume of the pump increases
Solution Approach 1:
The radial section of the feed duct is nested within the cover structure, with the duct wall forming an integral part of the cover thickness. The electronic components are fastened directly to the outer surface of the cover at the radial section, creating a nested arrangement where the cooling function is integrated into the structural component without adding external volume.
Solution Approach 2:
The feed duct radial section and the cover are merged into a single integrated structure. The duct wall and cover outer surface coincide, eliminating the need for separate cooling plates or heat exchange components. This merging allows electronic components to be fastened directly to the duct wall through the cover structure, reducing the number of parts and axial volume.
2Temperature
If the electronic components are fastened to the cover to improve heat transfer to fuel, then heat exchange efficiency is improved, but structural strength may be compromised
Solution Approach 1:
The cover is designed with localized recesses or relief features at specific positions where electronic components need to be fastened. These local modifications provide mounting surfaces without compromising the overall structural integrity of the cover. The radial section of the feed duct is positioned to coincide with these localized features, enabling both structural strength and heat exchange functionality.
3Temperature
If the radial section of ducts is made to project externally from the cover to reduce distance for heat transfer, then heat flow efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The radial section of the feed duct and the cover are merged into a single integrated component. The duct wall thickness corresponds to the cover thickness at the radial section, eliminating the need for separate duct and cover manufacturing steps. This integration simplifies production by reducing the number of parts and assembly operations while achieving the desired heat transfer efficiency.
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
This configuration optimizes heat flow and reduces the axial volume of the gear pump, improving heat dissipation and structural integrity while maintaining stable component fastening.
Implementation Method 1
at least one of the internally toothed rotor and the externally toothed rotor supports magnetic modules, such as stacks of iron laminations, which interact electromagnetically with a stator arranged on the outside of the internally toothed rotor and comprising electrical windings. When current is supplied to these windings electromagnetic conditions are created such that the gerotor starts to rotate
Implementation Method 2
the feed and delivery ducts are configured so as to comprise an axial portion or section, namely parallel to the axis of the gerotor, and a radial portion or section, which extends parallel to the outer surface of the cover which supports the electronic components of the control unit
Data Source
AI summary
An electric gear pump comprising: a gerotor rotatable about an axis of rotation A; a support base for the gerotor; a cover which can be joined to the base; a feed duct and a delivery duct; electronic components of the control unit which are fastened on the outer surface of the cover; wherein the feed and delivery ducts are at least partly formed in the cover and comprise an axial section parallel to the axis A and a radial section parallel to the outer surface of the cover; wherein the outer surface of the cover comprises an inset portion; wherein at least a portion of the radial sections of the feed and delivery ducts is configured so as to project externally from the inset portion of the outer surface of the cover and form projecting support portions for the electronic components of the control unit.