Electric Pump Closed Loop Cooling System
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Solution Overview
Problem
Existing centrifugal pumps face inefficiencies in cooling the motor member due to solid particles obstructing fluid circulation, leading to increased heat production and mechanical friction, and existing cooling solutions are complex and costly.
Innovation Solution
A centrifugal pump design featuring a cooling device with a containment body and conveying circuit that forces a cooling liquid to be sprayed into the chamber containing the motor member, allowing efficient cooling without compromising motor performance, with the liquid circulating through a helical path around the pump shaft and interacting with both the rotor and stator to optimize thermal exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If forced circulation of cooling liquid is used to increase cooling efficacy, then cooling efficiency is improved, but solid particles obstruct passage chambers increasing friction and heat production
Solution Approach 1:
The invention extracts and removes solid particles from the cooling liquid before it enters the passage chambers through a separation system comprising a separation chamber and centrifugal separation means. This prevents particles from obstructing the chambers while maintaining the forced circulation cooling system's efficiency.
Solution Approach 2:
The invention introduces an intermediary separation system between the cooling liquid source and the passage chambers. This intermediary system filters and separates solid particles from the liquid, allowing the cooling liquid to flow smoothly through the chambers without obstruction from particles.
2Productivity
If pump member is entirely removed from collection tank to increase liquid removal, then pumping capacity is improved, but cooling of electric part becomes insufficient
Solution Approach 1:
The invention introduces a closed-loop cooling system with a containment body and circulation pump as intermediaries. This system actively transports cooling liquid to the electric part's cooling passages, providing sufficient cooling even when the pump member is completely removed from the liquid in the collection tank.
Solution Approach 2:
The invention uses a hydraulic cooling system where a containment body holds cooling liquid and a circulation pump forces the liquid through cooling passages in the electric part. This hydraulic system provides controlled, reliable cooling independent of the pump member's immersion status.
3Ease of operation
If ventilation member is used for air cooling in dry mode, then cooling is achieved without liquid immersion, but cooling efficiency is reduced compared to liquid cooling
Solution Approach 1:
The invention implements a liquid-based hydraulic cooling system using a containment body and circulation pump to force cooling liquid through the electric part's passages. This provides superior cooling efficiency compared to air cooling, while the pump can operate in dry mode without being immersed in the collection tank's liquid.
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 provides reliable, efficient, and cost-effective cooling of the motor member, enhancing the pump's hydraulic and mechanical performance while minimizing friction and heat production, thus ensuring optimal operation in various applications.
Implementation Method 1
the cooling of the motor member occurs through the forced circulation of air in a closed circuit obtained inside a case external to the electric part
Implementation Method 2
a conveying circuit to cause the forced circulation of the cooling liquid contained in the containment body
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The electric pump (1) comprises a motor member (6) predisposed to operate in rotation a pump shaft (8) about its longitudinal axis (A), at least one pump stage (4) comprising an impeller (9) joined to the pump shaft (8) and a diffuser member (71) fixed relatively to the impeller (9), and a cooling device (10), to cause the circulation of a cooling liquid through a circuit affecting the motor member (6). The coolant is moved by rotation of the shaft (8) along a central channel (24) along the main axis (A) towards a discharge opening (26) where the fluid by virtue of rotation is sprayed over the rotor (62) and the stator (61) of the motor member (6), thus providing a closed loop cooling cycle for the electric motor wherein frictional losses are substantially reduced.