Electric Fluid Pump Rotor Axial Cooling Flow
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Solution Overview
Problem
Existing electric fluid pumps with wet-running areas face challenges in efficiently cooling electrical or electronic components due to high costs and reduced efficiency in conventional cooling methods.
Innovation Solution
The rotor is designed with cavities and radially arranged openings to generate an axially directed fluid flow during operation, creating a forced flow through the wet-running area between the rotor and stator, enhancing cooling by circulating fluid through the annular gap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a pierced shaft is used to ensure throttled short circuit for cooling the wet-running area, then the cooling effect is improved, but the manufacturing cost increases and pump efficiency decreases
Solution Approach 1:
The invention extracts the cooling function from the shaft structure by removing the need for a pierced shaft and instead uses the rotor's rotational motion to generate fluid flow through strategically positioned openings. This separates the cooling function from the structural shaft component, achieving cooling without the complexity and efficiency losses of a pierced shaft design
Solution Approach 2:
The rotor serves dual purposes: it performs its primary function of generating pump pressure while simultaneously generating cooling flow through its own rotational motion and integrated openings. The rotor's rotation automatically creates the fluid circulation needed for cooling without requiring separate cooling mechanisms or additional energy input
2Temperature
If a pierced shaft is used to ensure throttled short circuit for cooling the wet-running area, then the cooling effect is improved, but the pump efficiency is reduced
Solution Approach 1:
The invention uses dynamic fluid flow generated by the rotating rotor to achieve cooling, rather than a static pierced shaft design. The rotor's rotation creates continuous, adaptive fluid circulation that responds to operating conditions, maintaining pump efficiency while providing effective cooling through the dynamic interaction between the rotor and fluid
3Device complexity
If simple cooling means are used for the wet-running area, then the manufacturing cost is reduced, but the cooling effect may be insufficient
Solution Approach 1:
The rotor openings are positioned to ensure continuous fluid circulation through the wet-running area during rotation. The strategic placement of openings on both rotor faces creates uninterrupted fluid flow paths that maintain consistent cooling effectiveness throughout the pump's operational cycle, achieving reliable cooling with simple construction
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 solution provides effective and cost-efficient cooling of components in the wet-running area, promoting thermal energy removal and improving pump efficiency by ensuring a sufficient fluid circulation.
Implementation Method 1
the fluid pressure distribution in the cavity of the rotating rotor ensures that the fluid flows in through the radially inner opening and that the fluid flows out through the radially outer opening
Implementation Method 2
This ensures forced flow through the wet-running area between the rotor and stator of an electric fluid pump. The forced fluid flow generates a cooling effect
Data Source
AI summary
The invention relates to an electric fluid pump. The rotor of said pump is provided with means which produce an at least partially axially directed fluid flow in the wet section of the pump during rotation of the rotor. This fluid flow serves to cool components of the pump that are arranged in or on the wet section.