Electric Centrifugal Pump Cooling System Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric centrifugal pumps for electric automobiles face issues with heat dissipation, leading to overheating of components, poor cooling efficiency, and reliability risks due to flow loss and lift loss in the cooling water system, which limits the cooling capacity and increases the risk of component failure.
Innovation Solution
The design includes a motor shell with a water pump shell and a dual-bearing system for the rotor, a spiral overflowing hole, and a leading impeller that enhances cooling flow, reducing flow resistance and backflow, and an internal forced cooling system that increases the flow rate and cooling efficiency by directing water flow effectively through the pump.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal cooling water is led to flow out from the water inlet of the water pump impeller, then the cooling water can be circulated, but flow loss and lift loss occur reducing cooling efficiency
Solution Approach 1:
The cooling water flow path is segmented into separate inlet and outlet channels. The cooling water inlet is positioned at the rear end of the pump body, and the cooling water outlet is positioned at the front end, creating independent flow paths that avoid the centrifugal force field of the impeller, thereby eliminating flow loss and lift loss while maintaining effective cooling water circulation.
2Reliability
If a large flow of water is used for internal cooling, then cooling effect improves, but flow loss and lift loss increase making it impossible to use large flow
Solution Approach 1:
The cooling water inlet and outlet are segmented into separate positions on the pump body, with the inlet at the rear end and outlet at the front end. This segmentation creates a direct cooling water passage that bypasses the impeller's centrifugal force field, allowing large flow rates to be achieved without suffering from flow loss and lift loss, thereby enabling effective cooling with high flow rates.
3Reliability
If cooling water flows through the impeller inlet, then cooling can be provided, but temperature increased water may re-enter the cooling channel resulting in poor cooling effect
Solution Approach 1:
The cooling water system is segmented into distinct inlet and outlet positions on the pump body. The cooling water inlet is located at the rear end while the outlet is at the front end, creating a unidirectional flow path that prevents temperature-increased cooling water from re-entering the cooling channel. This segmentation ensures stable and continuous cooling effect.
Solution Approach 2:
The conventional cooling water flow path through the impeller inlet is inverted by positioning the cooling water inlet at the rear end of the pump body and the outlet at the front end. This inversion creates a cooling water passage that is independent of the impeller's centrifugal force field, preventing hot water recirculation and ensuring stable cooling water temperature.
4Device complexity
If immersion cooling is used with stationary internal cooling water, then structure is simplified, but internal heat cannot be dissipated well resulting in poor cooling effect
Solution Approach 1:
The cooling system is designed with segmented cooling water inlet and outlet channels positioned at the rear and front ends of the pump body respectively. This segmentation enables active cooling water circulation through the pump body without requiring complex cooling system structures, while effectively dissipating internal heat and ensuring reliable cooling effect.
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 solution improves the cooling effect and reduces heat load, enhancing the reliability of the electric centrifugal pump by increasing the flow rate and reducing flow resistance, thereby addressing the overheating issues and ensuring effective heat dissipation.
Implementation Method 1
a water pump impeller... a leading impeller... rotating movements of the leading impeller and the motor rotor drive the cooling water in the cavity to rotate
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
An electric centrifugal pump includes a water pump shell, a water sealing bearing, a water pump impeller, a spring washer, an inner motor cover, a bearing pedestal, a front rotor bearing, a motor stator, a motor rotor, a shaft of the motor rotor, a rear bearing of the motor rotor, a leading impeller, a leading impeller cover, a water pump driving control panel, a controller cover and a motor shell, and an internal forced cooling system is formed by the water inlet cavity of the water pump, an axial through hole of the shaft of the motor rotor, the leading impeller, a leading impeller cavity of the leading impeller, a spiral overflowing hole of the inner motor cover, a rotor cavity, a spiral overflowing hole of the bearing pedestal and the water pump impeller which are sequentially communicated. The electric centrifugal pump is simple in structure and ingenious in design, a flow loss of a water flow is reduced, a cooling effect of the internal cooling system is improved, a heat load problem of the electric centrifugal pump is well solved, and a working reliability of the electric centrifugal pump is improved.