Fixed-Shaft Pump Cooling Through Suction Port Exposure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pumps with a fixed shaft and rotor experience heat generation due to friction, necessitating improved heat dissipation.
Innovation Solution
The design incorporates a rotor that rotates about a central axis, a stator facing the rotor with a gap, an impeller connected to the rotor, and a housing with a rotor and impeller accommodating portion, featuring a fixed shaft exposed to a suction port to enhance heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a fixed shaft is used to support the rotor, then the rotor can be stably supported, but heat is generated due to friction between the fixed shaft and the rotor
Solution Approach 1:
The patent extracts the harmful heat generated by friction and removes it from the system by directing cooling water through channels formed in the fixed shaft. This separates the support function from the heat accumulation problem, allowing the fixed shaft to maintain stability while actively dissipating heat through the water flow paths.
Solution Approach 2:
Cooling water serves as an intermediary medium that absorbs heat from the fixed shaft through thermal conduction and carries it away. The water flows through channels in the fixed shaft, acting as a heat transfer medium between the friction-generated heat source and the external environment, thereby reducing the temperature of the fixed shaft.
2Device complexity
If the fixed shaft is completely enclosed in the housing, then the structure is compact, but heat dissipation is insufficient
Solution Approach 1:
The fixed shaft incorporates internal channels that function similarly to porous structures, allowing cooling water to flow through the interior of the shaft. These channels enable heat dissipation without compromising the external compact structure, as the cooling pathways are internal rather than external additions.
Solution Approach 2:
The patent moves the heat dissipation function from an external dimension (adding external cooling fins or exposed surfaces) to an internal dimension by creating channels within the fixed shaft itself. This allows heat dissipation to occur through the volume of the shaft rather than requiring additional external space.
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 dissipates heat generated by friction, improving the operational efficiency and reducing wear on components.
Implementation Method 1
heat is generated due to friction between the fixed shaft and the rotor. Therefore, for the pump as described above, an improvement in heat dissipation of the fixed shaft has been demanded
Implementation Method 2
heat is generated due to friction between the fixed shaft and the rotor
Data Source
AI summary
A pump includes: a rotor rotatable about a central axis; a stator that radially faces the rotor with a gap interposed therebetween; an impeller connected to one side of the rotor in an axial direction; a housing that includes a rotor accommodating portion that accommodates the rotor therein; and a fixed shaft that extends in the axial direction and rotatably supports the rotor. The housing includes a rotor supporting portion that supports the rotor from one side in the axial direction, an impeller accommodating portion that accommodates the impeller therein and has an interior connected to an interior of the rotor accommodating portion, and a first suction port that is open to the interior of the impeller accommodating portion. The impeller includes a second suction port that is open to one side in the axial direction. A part of the fixed shaft is exposed to the second suction port.