Electric Pump Stator Cooling Channel Arrangement
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Solution Overview
Problem
The accumulation of heat in the stator assembly of electric pumps used in vehicle lubrication and cooling systems can lead to reduced service life if not adequately dissipated.
Innovation Solution
The electric pump design includes a first and second accommodation cavity with a working medium that circulates to contact the stator assembly, utilizing channels to facilitate heat dissipation by flowing the medium through the stator assembly, thereby improving heat dissipation and extending the pump's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stator assembly operates continuously, then the electric pump maintains its pumping function, but heat accumulates in the stator assembly reducing service life
Solution Approach 1:
A working medium is introduced as an intermediary substance that circulates through channels in the stator assembly, absorbing heat from the stator windings and transporting it away. The medium acts as a thermal mediator between the heat-generating stator and the cooling system, enabling continuous operation without excessive heat accumulation.
Solution Approach 2:
The patent employs a hydraulic cooling system where a liquid working medium flows through channels formed in the stator assembly. The liquid circulation carries away heat generated by the stator windings, using fluid dynamics principles to achieve continuous heat removal and maintain operational reliability.
2Temperature
If cooling channels are added to the stator assembly, then heat dissipation is improved, but the device complexity increases
Solution Approach 1:
The cooling channels are merged with the stator assembly structure itself, forming an integrated design where the stator windings are positioned within or adjacent to the cooling channels. This combination eliminates the need for separate cooling components and reduces overall system complexity while maintaining effective heat dissipation.
Solution Approach 2:
The stator assembly serves dual functions: electromagnetic conversion and heat dissipation. The same structural elements that support the windings also provide the cooling channel pathways, making the stator a multi-functional component that simultaneously generates magnetic fields and manages thermal energy.
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 effectively enhances heat dissipation of the stator assembly, leading to improved service life and operational efficiency of the electric pump.
Implementation Method 1
a working medium is configured to circulate in the first accommodation cavity, and at least part of the working medium inside the first accommodation cavity is configured to flow into the second accommodation cavity through the first channel and be in contact with at least part of the stator assembly
Implementation Method 2
the flowing working medium can take away part of the heat of the stator assembly, which is beneficial for the heat dissipation of the stator assembly
Data Source
AI summary
An electric pump including a pump shaft, a first rotor assembly, a stator assembly, and a second rotor assembly. The first rotor assembly is arranged in a first accommodation cavity, the stator assembly and the second rotor assembly are arranged in a second accommodation cavity; the electric pump further comprises a first channel and a second channel, the first channel passes through the upper and lower surfaces of the bottom wall of a first accommodation portion, the first channel can communicate with first accommodation cavity and the second accommodation cavity, at least part of a work medium in the first accommodation cavity can flow into the second accommodation cavity through the first channel, the second channel is arranged to penetrate through a first end face of the pump shaft and a second end face of the pump shaft.