Electric Motor Pump Radial Cooling Flow Distribution
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Solution Overview
Problem
Existing electric motor-driven pumps experience reduced hydraulic efficiency due to undesirable fluid mechanical effects, such as turbulence, when the cooling flow is reintroduced into the delivery flow, leading to increased flow resistance, especially when pumping large volume flows.
Innovation Solution
The electric motor-driven pump incorporates a fluid distributor channel system that introduces the cooling flow into the pump chamber at a radial inflow direction, different from the axial direction, thereby reducing the unfavorable fluid mechanical effects and minimizing flow resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cooling flow is fed back into the delivery flow in an axial direction, then the cooling circuit is simple to implement, but turbulence forms and flow resistance increases
Solution Approach 1:
The patent changes the flow direction parameter of the cooling flow from axial to radial, which fundamentally alters how the cooling flow enters the pump chamber. This parameter change eliminates turbulence and reduces flow resistance while maintaining cooling effectiveness, directly resolving the contradiction between simple structure and low energy loss
2Temperature
If the cooling flow is fed back into the delivery flow, then cooling effectiveness is maintained, but hydraulic efficiency is reduced due to flow resistance
Solution Approach 1:
By changing the flow direction parameter from axial to radial, the patent simultaneously maintains cooling effectiveness (the cooling flow still absorbs heat from components) while eliminating the negative impact on hydraulic efficiency. The radial introduction prevents flow barriers and turbulence that would otherwise reduce productivity
3Productivity
If large volume flows are pumped, then the pump meets high demand requirements, but flow resistance increases due to cooling flow interaction
Solution Approach 1:
The radial introduction of cooling flow fundamentally changes the flow dynamics in the pump chamber. This parameter change ensures that even at large volume flows, the cooling flow does not create turbulence or flow barriers, thereby maintaining low flow resistance and high hydraulic efficiency across the entire operating range
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 design significantly reduces flow resistance and enhances the hydraulic efficiency of the pump, allowing it to operate more energy-efficiently and cost-effectively, particularly when handling large volume flows.
Implementation Method 1
the cooling flow fed back into the delivery flow and the delivery flow meet at a less unfavorable angle in terms of fluid mechanics
Implementation Method 2
fluid, which is diverted from a pump delivery flow, is conveyed as a cooling flow through a cooling channel passing through the pump by means of a pressure difference
Implementation Method 3
conveyed as a cooling flow through a cooling channel passing through the pump by means of a pressure difference between a suction region and an outlet region
Data Source
AI summary
An electric motor-driven pump is configured to convey fluid. The pump includes a pump housing which has a suction region and an outlet region and delimits or forms a pump chamber. A hollow rotor axle, through which a rotor channel passes, and a pump impeller, which is mounted on the same in a rotationally adjustable manner, are arranged in the pump chamber for conveying fluid. The electric motor-driven pump has a cooling circuit that is open to the pump chamber and is designed to cool an electric drive motor arranged in a motor region of the pump housing to drive the pump impeller in rotation.