Series Fan With Static Blades For Vibration Reduction
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Solution Overview
Problem
Conventional series fans have weak structural support at the air inlet and outlet, leading to increased vibration, higher material costs due to the need for protection screens, and limited aerodynamic design due to fixed blade positions.
Innovation Solution
The series fan design includes two fans with static blades and dynamic blade assemblies, where the first fan's air inlet communicates with the second fan's air outlet, enhancing support strength and protection while allowing for increased aerodynamic volume through adjustable blade arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If anterior static blades and posterior static blades are disposed at the middle of the series fan, then the structural support at the middle is improved, but the structural support at the air inlet and air outlet becomes weak
Solution Approach 1:
The fan structure is divided into multiple functional zones: a support frame providing structural support, a first blade group at the air inlet, a second blade group at the air outlet, and static blades at the middle. This segmentation allows each component to perform its specific function optimally - the support frame ensures systematic stability while the blade groups provide aerodynamic function at critical locations.
2Object-affected harmful factors
If protection screens are added to the air inlet and air outlet, then security is improved, but the airflow is obstructed and material cost is increased
Solution Approach 1:
The first and second blade groups are positioned at the air inlet and air outlet respectively, providing localized protection and guidance where needed. This local quality approach allows the blades to serve as both aerodynamic elements and protective components, eliminating the need for additional protection screens while maintaining security and optimizing airflow.
3Length of stationary object
If the total thickness of the series fan is limited by fixed assembling height, then the device fits within space constraints, but the aerodynamic design of the blades is limited
Solution Approach 1:
The patent optimizes the radial distribution and angular arrangement of the blade groups within the constrained axial thickness. By carefully designing the radius and spacing of the first and second blade groups relative to the support frame, the invention achieves effective aerodynamic performance within the limited space, utilizing the radial and angular dimensions to compensate for the constrained axial dimension.
Data Source
AI summary
A series fan includes a first fan and a second fan. The first fan has a first frame, a second frame and a first flow passage. The second fan has a third frame, a fourth frame and a second flow passage. A first static blade is disposed at the first frame, while a second static blade is disposed at the fourth frame. A first dynamic blade assembly is disposed in the first flow passage, while a second dynamic blade assembly is disposed in the second flow passage. The second frame is assembled with the third frame. The first and second static blades serve to enhance the support strength and protection effect for the series fan. In addition, the first and second dynamic blade assemblies can be designed with an increased aerodynamic volume.