Metal-Sleeve Fluid Pump Structure for Pressure and Heat Dissipation
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Solution Overview
Problem
Existing fluid pumps face issues with sleeve cracking under high fluid pressure and limited thermal conductivity, posing safety risks due to fluid erosion and heat accumulation in the motor components.
Innovation Solution
A fluid pump design featuring a metal sleeve separating the stator and rotor, with a shaft sleeve for enhanced stability and a metal shaft for improved contact area, along with a metal sleeve for high thermal conductivity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plastic sleeve is used to separate the stator and rotor, then electrical safety is maintained, but the sleeve cracks under high fluid pressure and thermal conductivity is limited
Solution Approach 1:
The patent introduces a metal sleeve as an intermediary component between the stator and rotor. This metal sleeve maintains the electrical isolation function while providing superior mechanical strength to withstand high fluid pressure, resolving the contradiction between electrical safety and pressure resistance.
Solution Approach 2:
The patent changes the material parameter of the sleeve from plastic to metal, which fundamentally alters both the strength and thermal conductivity properties. This material substitution enables the sleeve to withstand high pressure while improving heat dissipation capability.
2Reliability
If a plastic sleeve is used to separate the stator and rotor, then electrical safety is maintained, but thermal conductivity is limited causing heat accumulation
Solution Approach 1:
The metal sleeve serves as a thermal intermediary, conducting heat away from the motor components to the surrounding environment. This high-thermal-conductivity material replaces the plastic sleeve, enabling effective heat dissipation while maintaining electrical isolation.
Solution Approach 2:
By changing the material parameter from plastic to metal, the thermal conductivity parameter increases significantly. This enables the sleeve to effectively dissipate heat generated by the motor, preventing heat accumulation and improving overall thermal management.
3Stability of the object's composition
If a shaft sleeve is added for enhanced stability, then rotor stability is improved, but device complexity increases
Solution Approach 1:
The shaft sleeve is nested within the existing sleeve structure, creating a concentric arrangement. This nested configuration provides additional stability to the rotor while minimizing the increase in overall device complexity, as the new component integrates within the existing structural envelope.
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 prevents fluid erosion of the stator, enhances motor stability, and improves thermal dissipation, ensuring safe and efficient operation under high-pressure conditions.
Implementation Method 1
the thermal conductivity of a plastic sleeve is limited, making it difficult to dissipate heat generated by the motor to outside
Implementation Method 2
the shaft sleeve is fixed to the shaft seat through a tight fit, and the shaft is fixed to the shaft sleeve through a tight fit
Data Source
AI summary
A fluid pump includes a pump casing, an impeller arranged in the pump casing, and a motor for driving the impeller to rotate in the pump casing. The pump casing includes a metal sleeve arranged therein and dividing an internal space of the pump casing into a first space and a second space. The motor includes a stator received in the second space and a rotor received in the first space. The rotor is fixedly connected to the impeller and rotatably connected to a shaft. A shaft sleeve is fixedly arranged in the sleeve, and an end of the shaft is fixedly inserted into the shaft sleeve.