Oil Pump Passageway Layout for Bypassing Bearing Carrier Obstruction
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Solution Overview
Problem
Existing electric motor designs face challenges in delivering oil to the rotating assembly due to obstructions like bearing carriers, which disrupt the flow and reduce the amount of oil circulated for effective cooling.
Innovation Solution
An axially extending passageway in the oil pump housing bypasses the bearing carrier, allowing oil to flow directly to the rotating assembly, facilitated by a gerotor pump driven by the rotor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil is delivered to the rotating assembly through the housing, then cooling is achieved, but the bearing carrier obstructs the flow path
Solution Approach 1:
The housing is segmented into multiple chambers with dedicated flow passages. The oil pump housing includes a pump inlet chamber, pump outlet chamber, and a dedicated oil delivery passageway that bypasses the bearing carrier obstruction, allowing oil to reach the rotating assembly through a separate route.
Solution Approach 2:
A dedicated oil delivery passageway acts as an intermediary structure that connects the pump outlet chamber to the rotating assembly. This passageway provides an alternative flow path that circumvents the bearing carrier obstruction, ensuring uninterrupted oil delivery for cooling.
2Strength
If a bearing carrier is installed to support rotating components, then mechanical support is provided, but oil flow to the rotating assembly is blocked
Solution Approach 1:
The oil delivery system transitions from a two-dimensional planar flow path blocked by the bearing carrier to a three-dimensional pathway. The oil delivery passageway extends axially through the housing, utilizing the vertical dimension to bypass the bearing carrier obstruction and deliver oil to the rotating assembly.
3Productivity
If oil flow path is simplified to go directly from housing to rotating assembly, then cooling efficiency improves, but the bearing carrier creates an obstruction
Solution Approach 1:
The oil delivery function is extracted from the general housing structure and assigned to a dedicated oil delivery passageway. This separate, purpose-built passage removes the oil delivery function from the obstructed area, allowing direct and efficient oil flow to the rotating assembly without interference from the bearing carrier.
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
Enhances cooling efficiency by ensuring uninterrupted oil delivery to the rotating assembly, thereby improving heat removal from the drive system.
Implementation Method 1
The oil pump can include a gerotor pump driven by the rotor
Data Source
AI summary
An electric motor having a housing, a stator supported by the housing, a rotating assembly including a rotor supported for rotation relative to the stator, and an oil pump. The oil pump includes an oil pump housing having an oil passageway for the flow of oil from the housing to the rotating assembly.