Dynamic Mixer Head Single Sealing Portion Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dynamic mixer heads face challenges in manufacturing due to the complex arrangement of sealing elements, which also cause drag on the rotor, leading to improper mixing, especially with viscous compositions.
Innovation Solution
A dynamic mixer head design featuring a single sealing portion integrated into the rotor holding channel, allowing for free rotor rotation without leakage, and simplifying manufacturing by eliminating the need for complex dual sealing structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two sealing elements are arranged in axial orientation to prevent leakage, then sealing function is improved, but manufacturing complexity increases and rotor rotation freedom decreases
Solution Approach 1:
The patent combines the sealing function with the rotor support function into a single integrated sealing structure. The sealing element is positioned to simultaneously seal the interface between the rotor and housing while supporting the rotor axially, eliminating the need for separate sealing elements and reducing manufacturing complexity.
Solution Approach 2:
The sealing structure is designed to perform multiple functions: it provides sealing to prevent leakage, supports the rotor axially, and allows free rotation. This multi-functional design reduces the number of components needed while maintaining reliable sealing performance.
2Reliability
If two sealing elements are tightly fitted to prevent leakage, then sealing function is improved, but rotor rotation freedom decreases due to severe drag
Solution Approach 1:
The sealing element is designed with differentiated contact characteristics: it maintains tight contact in the radial direction to prevent leakage, while providing minimal contact and friction in the axial rotation direction. This local quality differentiation allows the seal to be effective without impeding rotor rotation.
3Reliability
If axial orientation of sealing elements is used, then leakage prevention is improved, but manufacturing difficulty increases due to restricted size and location
Solution Approach 1:
The sealing structure transitions from a purely axial orientation to include radial extension components. This dimensional change allows the seal to be manufactured using standard radial machining operations rather than complex axial operations in restricted spaces, significantly improving manufacturability while maintaining leakage prevention.
Data Source
AI summary
A dynamic mixer head has a cover, a housing, and a rotor. The cover has a first base board, two inlets, and a holding cylinder. A rotor holding channel is formed in the holding cylinder and a sealing portion protrudes from an inner wall surface of the rotor holding channel. The housing is mounted on the cover and has a second base board, a mixing cylinder, and an inner channel. The inner channel is formed in the mixing cylinder and fluidly communicates with an outlet. The rotor is rotatably disposed in the inner channel and has a rotor axle and a mixing rod. The rotor axle is disposed through the rotor holding channel, contacts and is surrounded by the sealing portion. The mixing rod has multiple first vanes. The dynamic mixer head does not need two sealing structures and tight fitting of the rotor and the holding cylinder.