Fan Motor Vane Airflow for Oil Dust Prevention
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Solution Overview
Problem
Conventional fan motors face issues with oil and dust deposition in environments where these contaminants are present, leading to rotor restraint and potential failure when reactivated.
Innovation Solution
The fan motor design features a vane wheel with airflow generated from the frame boss towards the hub unit, along with an enhanced oil-proof and dust-proof structure, including a wider gap between the stator and permanent magnet and a sloped surface on the frame boss to prevent oil intrusion and facilitate discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fan motor operates in an environment with floating oil and dust, then the motor can provide cooling and ventilation functions, but oil and dust deposit on the vanes and hub unit, causing rotor restraint and potential failure
Solution Approach 1:
The invention utilizes the harmful airflow that carries oil and dust toward the hub unit and converts it into a beneficial cleaning mechanism. By designing the vane wheel and hub unit with specific airflow paths, the motor's own operation generates airflow that prevents oil and dust from adhering to critical components, effectively using the system's operational state to counteract the harmful environmental factors.
Solution Approach 2:
The hub unit is designed with a composite structure combining a cylindrical body portion and a conical tip portion, creating a composite geometric form that optimizes airflow patterns. This composite structural approach enables the hub unit to simultaneously maintain structural integrity and generate effective airflow for preventing oil and dust deposition.
2Productivity
If the vane wheel is designed to generate strong airflow for effective ventilation, then the cooling performance is improved, but the airflow may carry more oil and dust particles toward the hub unit, increasing deposition risk
Solution Approach 1:
The invention applies different geometric characteristics to different parts of the hub unit: the cylindrical body portion and the conical tip portion have distinct shapes that create localized airflow patterns. This local quality differentiation ensures that high-velocity airflow for effective ventilation is maintained while specific regions are designed to deflect or redirect oil and dust particles away from critical areas.
Solution Approach 2:
The conical tip portion of the hub unit introduces curved surface geometry that modifies airflow patterns. The curved surface of the conical portion helps to smooth airflow transitions and redirect oil and dust particles along the cone surface, preventing them from entering the motor housing and depositing on internal components.
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 configuration reduces oil deposition on the hub unit, prevents oil from entering the motor, and ensures smooth rotor operation even in environments with floating oil and dust, while maintaining electromagnetic induction performance.
Implementation Method 1
The vanes or the vane wheel are formed so as to generate an airflow from the side of a frame boss toward a hub unit of the vane wheel
Implementation Method 2
a stator constituted of an armature having a winding thereon, a rotor constituted of an excitation unit including a permanent magnet
Data Source
AI summary
A fan motor is provided that prevents restraint on a rotor in an environment where oil and dust are floating in the air. The fan motor includes a stator constituted of an armature having a winding thereon, a rotor constituted of an excitation unit including a permanent magnet, and a vane wheel fixed to the rotor and including a plurality of vanes. The vanes or the vane wheel are formed so as to generate airflow from the side of a frame boss toward a hub unit of the vane wheel.