Filter Device Bypass Valve Integration
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Solution Overview
Problem
Current filter devices used in technical equipment, such as hydraulic systems, are costly to manufacture due to complex bypass valve designs, which increase overall production expenses.
Innovation Solution
A filter device design featuring a circular element cap with uniformly distributed plate-like webs, integrating the valve closing member and locking spring on the cover part, and a valve seat on the element cap, simplifies the bypass valve mechanism, reducing material requirements and manufacturing costs. The hollow cylinder with a compression spring and guide wall facilitate a sealing system, and a differential pressure measuring device with optical evaluation provides operational state feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex bypass valve design is used, then the reliability of the filter device is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines the bypass valve function directly with the filter element structure. The valve closing element is integrated into the filter element's end cap, and the valve seat is formed on the filter element itself, eliminating the need for separate valve housing components. This merging of functions reduces part count and manufacturing complexity while maintaining the safety bypass functionality.
Solution Approach 2:
The filter element's end cap serves multiple functions: it seals the filter material, provides structural support, and houses the bypass valve mechanism. The valve closing element simultaneously acts as a sealing component and a valve actuator. This multi-functionality reduces the overall component count and simplifies manufacturing.
2Reliability
If the valve seat part is located on a separate component, then the bypass valve function is achieved, but the device complexity increases
Solution Approach 1:
The valve seat part is formed directly on the filter element's end cap, merging the valve seating function with the filter element structure. This eliminates separate valve seat components and reduces the number of assembly steps required.
Solution Approach 2:
The bypass valve mechanism is extracted from a separate housing and integrated directly into the filter element structure. The valve closing element and spring assembly are positioned within the filter element's end cap, removing the need for external valve housings and reducing overall device complexity.
3Reliability
If more material is used for the bypass valve assembly, then the sealing and reliability are improved, but the manufacturing cost increases
Solution Approach 1:
The patent applies sealing surfaces and valve components only where strictly necessary for the bypass function. The valve seat is formed locally on the end cap, and the sealing surfaces are provided only at the valve closing element and valve seat interface, rather than using extensive sealing materials throughout the assembly.
Solution Approach 2:
The filter element, including its integrated valve components, is designed as a disposable unit that is replaced rather than repaired. This allows the use of simple, cost-effective materials for the valve components that do not require long-term durability beyond the filter element's service life.
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 design results in a cost-effective filter device with reduced manufacturing costs and enhanced reliability through simplified bypass valve construction and integrated safety features, ensuring efficient fluid path diversion during filter element failure and providing real-time operational state monitoring.
Implementation Method 1
a compression spring (69) arranged in the cavity, which, acting on the valve closing element (65), closes the bypass
Implementation Method 2
the compression spring (69), acting on the valve closing element (65), closes the bypass
Implementation Method 3
The hollow cylinder (65) has a circumferential contact slope on the outside at the end closed by the bottom, which forms a valve cone which, under the influence of the compression spring (69), is held in sealing contact with the valve seat part
Implementation Method 4
a differential pressure measuring device (77), which provides an indication of the operating status of the filter element (13) based on the pressure gradient formed on the filter material (27)
Data Source
Figure 1
Figure 2
AI summary
2. A filter device comprising a filter housing (1) with a filter head (3), a filter pot (7) and a removable housing cover part (51), which accommodates a filter element (13) that separates an unfiltered side (15) from a filtrate side (17), and with a bypass valve device comprising a valve closing element (65) which is biased by a closing spring (69) into a closed position against a valve seat part (74) and, when the filter element (13) is blocked, enters a position in which it opens a fluid path from the unfiltered side (15) to the filtrate side (17) by bypassing the filter element (13), is characterized in that the valve closing element (65) and the closing spring (69) are arranged on the cover part (51) and the valve seat part (74) is located on an element cap (43) of the filter element (13).which has a receiving part (45) forming a frame for the end of the filter material (27) of the filter element (13) facing the lid part (51).