Filter Device Pressure Pulsation Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing filter devices in hydraulic systems face damage from pressure pulsations and peaks, which impair dirt absorption and fineness of the filter material, and previous solutions require large installation spaces, hindering compact design.
Innovation Solution
A filter device with a compressible casing made of porous materials like foam rubber, arranged between the filter material and the housing, which compresses to absorb pressure increases, allowing for a compact design and easy filter element replacement while providing anti-freeze protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible compensating device is used to smooth pressure fluctuations, then pressure pulsations are dampened, but the installation space required inside the filter housing increases
Solution Approach 1:
The compensating device is nested within the existing filter element structure by positioning it in the annular space between the outer support tube and the housing wall. This allows the compensating function to be integrated into the existing filter housing volume without requiring additional installation space.
Solution Approach 2:
The compensating device utilizes the radial dimension (annular space) rather than extending axially, transforming the space utilization from one-dimensional to two-dimensional. This enables pressure compensation functionality while maintaining a compact axial profile that fits within the existing filter housing dimensions.
2Reliability
If the compensating device is designed to absorb pressure peaks, then filter material damage is prevented, but the device complexity increases
Solution Approach 1:
The compensating device employs a flexible membrane that can elastically deform to absorb pressure peaks. This simple flexible structure replaces complex mechanical pressure regulation systems, providing filter material protection through straightforward elastic compression and expansion cycles.
Solution Approach 2:
The compensating device operates autonomously using the elastic properties of the membrane material itself, without requiring external control systems, sensors, or additional actuating mechanisms. The membrane automatically expands and contracts in response to pressure variations, providing self-regulating protection.
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 effectively dampens pressure pulsations, prevents filter material damage, and allows for convenient and environmentally friendly filter element changes, while maintaining a compact design and protecting against freezing temperatures.
Implementation Method 1
the volume increases due to the compression of the casing by the pressure present on the outer support tube
Implementation Method 2
the resilient compensating element is arranged between the outside of the filter material of the filter element and the adjacent inner wall of the housing
Implementation Method 3
A filter device with a compressible casing made of porous materials like foam rubber, which compresses to absorb pressure increases
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a filter device comprising at least one filter element (3), through which a fluid to be purified can flow with a determinable fluid operating pressure and which can be accommodated in a housing (1), wherein the fluid pressure prevailing at the respective filter element (3) may exhibit general pressure increases or pressure peaks which are damaging to the respective filter element (3), in particular to the filter material (9) thereof, and which can be reduced and/or smoothened by means of a compensation device which acts directly upon the respective filter element (3) and which has at least one flexible compensation element (29) that enables the volume of the fluid chamber of the housing (1) to be increased in accordance with a pressure peak or pressure increase, characterised in that the flexible compensation element (29) is arranged between the outer side of the filter material (9) of the filter element (3) and the adjacent inner wall of the housing (1).