Vacuum Pump Filter Element Alignment for Reliable Replacement
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Solution Overview
Problem
Existing filter systems for vacuum pumps, particularly oil-sealed vacuum pumps like rotary vane pumps, are complicated to replace and prone to improper installation, leading to compromised filtering performance or complete failure.
Innovation Solution
A filter system with a filter element designed for a defined position in the filter housing, featuring a non-round cross section, wing-shaped tabs, and a tensioning element, allowing for easy and secure insertion and sealing, without radial movement or threading, and ensuring correct alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filter element is designed with a defined position and non-round cross section, then the installation correctness is improved, but the device complexity increases
Solution Approach 1:
The filter element is designed with a non-round cross-section (oval or rectangular) instead of a circular one, creating an asymmetric shape that can only be inserted into the filter housing in the correct orientation. This asymmetric design ensures proper alignment of the inlet and outlet elements with the housing connections, eliminating installation errors while the complexity remains manageable through the simple geometric modification.
2Ease of repair
If components connected to the filter element are dismantled for replacement, then the filter element can be replaced, but the ease of operation deteriorates and contamination risk increases
Solution Approach 1:
The filter element is designed as a separate, self-contained module with integrated inlet and outlet connections that do not require dismantling of housing components for replacement. The element can be independently removed and installed by simple axial insertion and withdrawal movements, allowing maintenance personnel to replace the filter element without disassembling other parts of the filter housing, thus improving ease of operation and reducing contamination risk.
3Manufacturing precision
If the filter inlet element and housing inlet are designed for single-position reception, then the manufacturing precision is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The filter inlet element and housing inlet are designed with complementary asymmetric shapes (non-round cross-sections) that naturally guide the filter element into the correct position during installation. The asymmetric geometry provides mechanical guidance that ensures proper alignment without requiring high-precision manufacturing tolerances, as the shape itself enforces the correct positioning through form-fit engagement.
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
Facilitates simple and clean replacement of filter elements, ensuring reliable filtering performance by maintaining correct positioning and sealing, reducing the risk of contamination and operational issues.
Implementation Method 1
The filter element (10) serves to filter lubricant, such as oil, from a lubricant-gas mixture which in particular is a lubricant-air mixture
Implementation Method 2
The tensioning element is designed to generate a retaining force between the filter element (10) and the filter housing (12)
Data Source
Figure 1~4
Figure 5~6
AI summary
A filter system for vacuum pumps, in particular for oil-sealed vacuum pumps, comprises a filter element (10). The filter element (10) is arranged in a filter housing (12). A filter inlet element (14) is accommodated in a housing inlet (16). Further, the filter element (10) has wing-shaped tabs (54) in particular in the region of a filter outlet element (24), the tabs cooperating with corresponding slot-shaped receiving elements (58) provided in the pump housing (12). For an improved adjustment of the filter element (10) in a defined position in the filter housing (12), the filter inlet element (14) and the housing inlet (16) and/or the retaining elements (54) and the receiving elements (58) are formed correspondingly.