Windmill Blade Segmentation for Vibration Reduction
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Solution Overview
Problem
Conventional windwheels face issues with vibration, noise, efficiency, and balance due to limited air outlet sectional area and complex welding processes.
Innovation Solution
The design features a windmill with primary and secondary blades on opposite surfaces of the first end plate, forming a circle with a larger diameter than the second end plate, and incorporating locating pins and lug bosses for simplified and accurate welding, increasing air outlet area and static pressure without increasing rotation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the diameter of the windwheel is increased to improve air outlet area and static pressure, then efficiency and static pressure are improved, but the rotation speed increases causing more vibration and noise
Solution Approach 1:
The windwheel is divided into primary blades and secondary blades that are separately welded to the first end plate and second end plate. This segmentation allows for precise positioning and balanced assembly, reducing vibration and noise while maintaining the larger diameter for improved air outlet area and static pressure.
Solution Approach 2:
The primary blades and secondary blades are combined to form a complete windwheel structure. The primary blades are welded to the first end plate, and the secondary blades are welded to the second end plate, creating a balanced assembly that reduces vibration and noise while maintaining improved efficiency and static pressure.
2Ease of manufacture
If traditional welding processes are used to attach blades to end plates, then manufacturing is simpler, but welding accuracy is poor leading to imbalance and reduced reliability
Solution Approach 1:
Locating pins are pre-installed on the end plates before welding the blades. These locating pins establish precise positions for the blade roots, ensuring accurate positioning and alignment during the welding process. This preliminary action maintains ease of manufacture while significantly improving welding accuracy and reducing blade imbalance.
3Productivity
If the windwheel operates at higher rotation speed to improve air volume output, then productivity increases, but vibration and noise increase reducing reliability
Solution Approach 1:
The windwheel is segmented into primary blades and secondary blades that are separately positioned and welded. This segmentation enables precise balancing of the rotating assembly, reducing vibration and noise at operating speeds while maintaining high air volume output through the larger diameter design.
Solution Approach 2:
The design changes the physical parameters of the windwheel by increasing the diameter and adding secondary blades, which improves air volume output without requiring higher rotation speeds. The locating pins ensure precise positioning that maintains balance at operational speeds, reducing vibration and noise while maintaining productivity.
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 reduces vibration and noise, improves efficiency, and enhances welding accuracy, resulting in a more balanced and efficient windwheel operation.
Implementation Method 1
a motor shaft, and a windwheel. The windwheel comprises a first end plate, a second end plate, and a plurality of primary blades disposed between the first end plate and the second end plate
Implementation Method 2
The plurality of primary blades and the plurality of secondary blades are disposed on two opposite surfaces of the first end plate, respectively
Data Source
AI summary
A windmill, including a first end plate, a second end plate, and a plurality of primary blades disposed between the first end plate and the second end plate. The first end plate includes a central part provided with a base connected to a motor shaft. The second end plate includes a central part provided with an air inlet; the space between every two adjacent blades forms an air channel. The plurality of primary blades each includes an outmost end with respect to the central part of the first end plate, and the outmost end extends out of an outer edge of the second end plate. The connection line of every two adjacent outmost ends of the plurality of primary blades forms a circle, and the diameter D1 of the circle is larger than the diameter D2 of the second end plate.