Convection Fan Blade Outer Edge Frame Deformation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Convection fan blades are prone to deformation in harsh environments, leading to poor balance performance and increased vibration and noise due to insufficient strength.
Innovation Solution
The fan blade structure includes a central disk with multiple blades and an outer edge frame connected to the outmost side of each blade in a radial direction, enhancing stability and preventing deformation, with features such as integral or integrally molded structures and reinforcing ribs to improve strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fan blade structure uses a simple design without outer edge frame, then the device complexity is reduced, but the blade strength and resistance to deformation in harsh environments deteriorates
Solution Approach 1:
The fan blade is divided into multiple functional parts: central disk, multiple blades, and outer edge frame. This segmentation allows each part to perform its specific function while collectively achieving the required strength and balance performance.
Solution Approach 2:
The outer edge frame is connected to the outmost side of each blade, merging the blades into a unified structure. This combining enhances the overall structural integrity and prevents individual blade deformation, solving the strength issue while maintaining reasonable complexity.
2Reliability
If the fan blade structure adds an outer edge frame connected to all blades, then the blade strength and balance performance are improved, but the device complexity increases
Solution Approach 1:
The outer edge frame is positioned at the outmost side of each blade in the radial direction, creating an asymmetric structure that specifically targets the balance performance issue without requiring symmetric reinforcement throughout the entire blade structure.
Solution Approach 2:
The outer edge frame extends in the radial direction from the central disk, adding a dimensional element that connects all blades. This radial extension provides structural support that improves balance performance without significantly increasing overall structural complexity.
3Productivity
If the fan blade operates in harsh environments like high temperature or high rotating speed, then the productivity and functional performance are improved, but the blade deformation risk increases due to insufficient strength
Solution Approach 1:
The outer edge frame is pre-installed and connected to all blades before the fan operates in harsh environments. This preliminary structural reinforcement ensures that the blades are already stabilized and resistant to deformation before encountering high temperature or high rotating speed conditions.
Solution Approach 2:
The addition of the outer edge frame changes the structural parameters of the fan blade, increasing its rigidity and strength. This parameter change enables the blade to withstand the stress of high rotating speeds and high temperatures without deforming, thus maintaining stability under improved operating conditions.
Data Source
AI summary
A fan blade structure of a convection fan includes a fan blade body. The fan blade body includes a central disk secured to the rotating shaft of the motor and multiple blades evenly distributed in a circumferential direction of the central disk. The fan blade body further includes an outer edge frame, the outer edge frame is connected to an outmost side of each of the blades in a radial direction of the central disk. The outer edge frame is connected to an outmost side of the blade in the radial direction of the central disk through the outer edge frame, which makes all the outmost sides of all the blades secured to the outer edge frame, thus the stability of the blade is strengthened, blade deformation in harsh environments is avoided, thereby the balance performance of the fan blade is improved, and the vibration or noise is reduced.