Rotating Air Filter Seal Pins Prevent Displacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Air filters with rotatable cartridges experience seal displacement due to suction pressure from accumulated impurities, leading to potential seal rupture and compromised airflow.
Innovation Solution
The filter cartridge is equipped with hook-shaped sealing pins at the axis of rotation, which clamp between the cartridge and housing, preventing displacement of the seal during suction pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter cartridge rotates to a working position, then the filter can be installed and removed easily, but the seal is less compressed in the rear part leading to potential displacement and rupture
Solution Approach 1:
The patent applies local quality by adding sealing pins specifically at the rear part of the seal where compression is insufficient. These pins provide localized reinforcement to ensure uniform seal compression throughout the filter cartridge, particularly addressing the weak compression zone in the rear area while maintaining the overall rotational ease of operation.
2Productivity
If impurities accumulate on the filter cartridge, then airflow is compromised and negative pressure is created, but the seal remains stable
Solution Approach 1:
The sealing pins are installed in advance on the filter cartridge before operation begins. They proactively prevent seal displacement by creating mechanical resistance against the suction forces that will develop when impurities accumulate and airflow is compromised. This preliminary protective measure counteracts the future harmful effect of seal displacement.
3Reliability
If the seal is compressed uniformly during installation, then tightness is ensured, but the sealing pins are not needed
Solution Approach 1:
Rather than redesigning the entire seal structure for uniform compression, the patent applies a localized solution by adding sealing pins only where needed - in the rear part of the seal where compression is insufficient. This minimizes the increase in device complexity while effectively addressing the tightness issue.
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 ensures consistent seal compression and prevents impurities from entering the filter, maintaining airflow integrity and extending seal lifespan.
Implementation Method 1
the seal on the axis of rotation of the filter cartridge is equipped with sealing pins mounted in its extension and protruding from this cartridge so as to be between it and be clamped to the filter housing in working position
Implementation Method 2
the filter cartridge rotates movably with respect to the filter case about an axis located in the rear part of this case, between on the one hand a working position in which it is inserted in a bearing of the case, and on the other hand a release position
Implementation Method 3
which are compressed during the installation of the filtering cartridge so as to ensure the tightness between this cartridge and the filter housing
Implementation Method 4
As a result and while the engine is in operation, a negative pressure is created downstream of the filter insert (on the clean side)
Data Source
Figure 1~5
Figure 6~8
AI summary
The filter has a filtering lining (3) mounted in a trapezoidal shaped rotative removable filtration slide (2). The lining has a sealing joint (10) that is compressed during assembling of the valve in a working position in which the slide is introduced in a receiving housing of an air filter case (1), to guarantee sealing between the valve and the case in the position. The joint has hook shaped sealing pins (11), which are situated in an extension of the valve, where the pins project beyond the slide for pinching the pins between the slide and the case in the position.