Filter Element Valve Actuation for Hydraulic System Reliability
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Solution Overview
Problem
Existing filter devices in hydraulic systems lack operational reliability, as they can be inadvertently started without a filter element or with unsuitable elements, leading to potential system failure and economic loss.
Innovation Solution
A filter device with a valve arrangement on the element receiver that is normally blocked, requiring a control device on the end cap to unblock, ensuring only suitable filter elements are used, and featuring a high actuating force for reliable operation, including a spring-loaded valve configuration and a clogging indicator for multiple functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a filter device allows free installation of filter elements, then ease of operation is improved, but operational reliability deteriorates due to inadvertent startup without proper filter elements
Solution Approach 1:
The valve arrangement is pre-configured in a blocked state that prevents fluid flow unless a proper filter element is installed. The control device on the end cap must be actively engaged to unblock the valve, creating a preliminary protective action against inadvertent startup without proper filtration
Solution Approach 2:
The control device on the end cap serves as an intermediary between the filter element installation and the unblocking of the valve arrangement. This intermediary mechanism ensures that only properly installed filter elements with corresponding control devices can activate the fluid path, bridging the gap between ease of installation and operational reliability
2Reliability
If a valve arrangement is added to prevent inadvertent startup, then operational reliability is improved, but device complexity increases
Solution Approach 1:
The control device is integrated directly into the end cap of the filter element, merging the control function with the existing structural component. The valve arrangement is incorporated into the element receiver, combining multiple functions into unified components rather than adding separate independent systems
Solution Approach 2:
The end cap serves multiple functions: it encloses the filter material, provides structural support, and houses the control device for valve operation. The element receiver simultaneously supports the filter element and contains the valve arrangement, reducing overall system complexity through multi-functional components
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
Enhances operational reliability by preventing system operation without a suitable filter element and signaling unsuitable elements, ensuring safe and effective filtration while maintaining a compact and economical design.
Implementation Method 1
a valve arrangement (55) on the element receiver (13) which normally blocks a fluid path (53) for the cleaned fluid, but which can be unblocked by a control device (79)
Data Source
AI summary
A filtering device for fluids includes a filter housing (1) and a filter element (9) received in the filter housing. The filter element has an end cap (17) on at least one end. The end cap forms an enclosure for the corresponding end edge of the filtering material (23, 35) and is fixed on an element receiver (13) interacting with the bottom part (5) of the filter housing (1) to fix the position of the filter element (9) in its functional position. The element receiver forms a fluid path for the cleaned fluid exiting the hollow chamber (19) of the filter element (9). The element receiver (13) contains a valve arrangement (55) blocking the fluid path (35). A control device (79, 83) releasing the valve arrangement (55) in the functional position is on the end cap (17) of the filtering element (9). The end cap is fixed on the element receiver (13).