Oil Filter Standpipe Sealing Element for Residual Liquid Discharge
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Solution Overview
Problem
Existing liquid filters, particularly oil filters, face challenges in efficiently managing the discharge of residual liquid during filter element replacement and ensuring a secure seal between clean and contaminated sides, often leading to leakage and increased manual effort.
Innovation Solution
A liquid filter design featuring a standpipe with a sealing element that seals the discharge hole during filter element removal and installation, using an elastomer ring for secure sealing, and a spring-loaded mechanism for compressing the gasket to ensure a tight seal between the standpipe and housing, allowing for easy installation and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a filter element is separated from the filter housing for maintenance, then the filter element can be easily replaced, but residual liquid remains in the housing and cannot be discharged
Solution Approach 1:
The sealing element is divided into two functional regions: a first operation region that seals the discharge hole during normal operation, and a second operation region that opens the discharge hole during filter element removal. This segmentation allows the same component to serve different functions in different operational states, enabling residual liquid discharge without requiring additional mechanisms.
2Reliability
If a sealing element is used to seal the discharge hole during filter element installation, then liquid leakage is prevented, but the discharge hole becomes blocked and residual liquid cannot flow out during maintenance
Solution Approach 1:
The sealing element transitions from a static seal to a dynamic seal that changes its sealing state based on operational conditions. During normal operation, the sealing element maintains contact with the housing to seal the discharge hole. During filter element removal, the sealing element moves to a different position or changes its sealing characteristics to open the discharge hole, allowing residual liquid to flow out.
3Reliability
If a complex sealing mechanism is used to ensure secure sealing between clean and contaminated sides, then leakage is prevented, but the installation process becomes more difficult and time-consuming
Solution Approach 1:
The sealing element serves multiple functions simultaneously: it seals the discharge hole during normal operation, seals the interface between the standpipe and filter element, and enables residual liquid discharge during maintenance by opening the discharge hole. This multi-functionality eliminates the need for separate mechanisms for each function, simplifying the overall design while maintaining reliable sealing.
4Reliability
If the sealing element is positioned to seal the discharge hole, then leakage is prevented, but angular positioning is required which complicates installation
Solution Approach 1:
The sealing element is designed with uniform sealing characteristics around its circumference, creating a radially symmetric sealing interface with the housing. This homogeneous sealing design ensures that the sealing performance is independent of angular position, allowing the filter element to be installed at any orientation without requiring precise angular alignment.
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 enables efficient discharge of residual liquid during filter element replacement, prevents leakage by ensuring a secure seal between clean and contaminated sides, and simplifies the installation process by allowing for angular independence and reduced manual effort.
Implementation Method 1
The sealing element is advantageously formed as an elastomer ring punched from tubing
Implementation Method 2
a spring-loaded mechanism for compressing the gasket to ensure a tight seal between the standpipe and housing
Data Source
AI summary
A liquid filter with a filter housing (9) with a filter element (8, 108, 208) arranged within. Within the filter element (8, 108, 208) a standpipe (3, 103, 203) is arranged. This standpipe is sealing connected with the filter element, whereby in the connecting range between standpipe and filter element a sealing element (15, 115) is arranged for sealably closing a discharge hole (11) in the housing (9). The sealing element (15, 115) seals the discharge hole and also sealably separates a clean side from a contaminated fluid side by sealing between the standpipe and the filter housing.