Hydraulic Filter Sealing Locking Mechanism
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Solution Overview
Problem
Filter devices in hydraulic systems face challenges in maintaining a reliable seal under alternating pressure loads, which can lead to leakage and reduced filtration efficiency.
Innovation Solution
A locking device is integrated to securely hold the sealing element in place relative to the first sealing surface, ensuring it remains immovable in the axial direction, even under pressure fluctuations, using a combination of locking members and a supporting ring to ensure proper alignment and sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing element is used to seal off the dirt area from the clean area, then sealing is achieved, but under alternating pressure loads the sealing element may move away from the sealing surface causing leakage
Solution Approach 1:
The locking device is activated during the insertion process to engage locking members with locking surfaces before pressure loads are applied. This preliminary locking action ensures the sealing element remains firmly positioned on the sealing surface even when subsequent alternating pressure loads occur during operation, preventing any movement that would compromise sealing reliability
2Reliability
If the sealing element is held firmly on the sealing surface, then sealing reliability is improved, but the filter element becomes more complex
Solution Approach 1:
The locking device is integrated into the existing filter element structure by incorporating locking members that are part of the filter element assembly and locking surfaces that are formed on the filter housing. This merging approach achieves reliable sealing without adding significant complexity, as the locking functionality is combined with the existing structural components rather than adding entirely separate systems
Data Source
AI summary
The invention relates to a filter device for filtering a liquid, in particular, a hydraulic oil, comprising a filter housing having a least one inlet for liquid to be filtered and at least one outlet for filtered liquid, a filter element positioned in the flow path of the liquid between the inlet and the outlet, and a sealing device having a sealing element and a first sealing surface, the sealing element in a sealing position being positioned in a sealing manner on the first sealing surface. In order to further develop the filter device in such a way that the sealing element also lies reliably on the first sealing surface under alternating pressure loads, it is proposed, in accordance with the invention, that the filter device comprise a locking device, and the sealing element be adapted to be locked in its sealing position at least in the axial direction relative to the first sealing surface by means of the locking device. A filter element for the filter device is also proposed.