Hydraulic Filter Cartridge with Integrated Sealing and Blocking
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Solution Overview
Problem
Existing filter devices for hydraulic systems are complex and require manual control mechanisms, making them costly and difficult to operate and maintain, especially when replacing filter media, which can lead to fluid leakage and environmental contamination.
Innovation Solution
A filter device with a compact design featuring a filter element that forms a unitary cartridge with integrated energy storage mechanisms for automatic blocking and sealing, allowing for easy installation and removal without external control parts, ensuring fluid-tight operation and simplified maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual control mechanisms (rotary slide with poppet valves) are used to shut off fluid connections, then fluid leakage can be prevented, but device complexity and cost increase
Solution Approach 1:
The filter element is designed with integrated sealing elements that automatically engage with the connection device when the filter element is inserted. The sealing elements (radial seal and flat seal) are positioned to contact sealing surfaces on the connection device, creating automatic fluid tight sealing without requiring external control mechanisms. This self-sealing approach eliminates the need for manual rotary slides and poppet valves while ensuring reliable fluid leakage prevention.
Solution Approach 2:
The sealing function is merged directly into the filter element structure by integrating sealing elements onto the closing part. The closing part incorporates both the radial seal for the outer circumference and the flat seal for the central opening, combining multiple sealing functions into a single integrated component that works automatically upon installation.
2Ease of operation
If filter element design includes integrated sealing mechanisms, then ease of operation improves, but manufacturing complexity increases
Solution Approach 1:
The sealing elements are designed as flexible sealing components (radial seal and flat seal) that can be integrated onto the closing part of the filter element. These flexible seals conform to the sealing surfaces on the connection device, ensuring reliable sealing while maintaining relatively simple manufacturing processes for the overall filter element structure.
3Productivity
If automatic blocking mechanism is implemented, then productivity improves, but device complexity increases
Solution Approach 1:
The filter element design enables automatic blocking of fluid connections through integrated sealing elements that engage automatically when the filter element is inserted. The closing part with sealing elements self-activates to seal the connection device, eliminating the need for external control mechanisms and enabling rapid filter element replacement without complex automated systems.
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
The solution provides a cost-effective, user-friendly filter device that operates independently of external controls, ensuring efficient fluid filtration and easy replacement of filter media, minimizing leakage risks and environmental pollution.
Implementation Method 1
a compression spring serving as a first energy store being supported on the spring housing, whose other end prestresses the closing part
Implementation Method 2
a second compression spring serving as a second energy store which prestresses the lower receiving part and the closing part into sealing contact with one another
Implementation Method 3
filter element having a filter medium arranged between two receiving parts
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Filter device with at least one filter element (11) comprising a filter medium (27) arranged between two receiving parts (31, 35) and a connection device located on the lower receiving part (35) for a fluid connection with a fluid device, in particular a fluid tank (1), with a closure part (45) arranged on the connection device, which is biased by the action of a first energy storage device (43) for a movement away from the upper receiving part (31) into a closed position that blocks the connection device, with a further, second energy storage device (49) for generating a relative movement between the lower receiving part (35) and a closing part (17) of the device and with a sealing device (55) which acts as a seal between the lower receiving part (35) and the closing part (17) as soon as the latter and the lower receiving part (35) are in contact with each other under the influence of the second energy storage device (49),characterized in that the filter medium (27) surrounds a fluid-permeable support tube (29) defining an inner filter cavity (33), into which a spring housing (41) extends from a central opening (37) of the lower receiving part (35) forming a component of the connection device, and on which a compression spring (43) serving as a first energy storage device is supported, the other end of which biases the closing part (45) slidably guided in the spring housing (41) into the closed position abutting the opening edge of the central opening (37).