Eccentric Two-Way Check Valve Structure for Resonance Noise Reduction
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Solution Overview
Problem
Conventional two-way check valves produce loud and sharp whistling noise due to resonance with airflow, have complex structures leading to high production costs, and are difficult to assemble, thus failing to meet customer and regulatory noise requirements.
Innovation Solution
A simple structure two-way check valve with an eccentric valve body and push element, altering the natural frequency and airflow state by an eccentric distance, eliminating resonance and noise without additional parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional two-way check valve structure is used, then the valve can perform basic check function, but it produces loud whistling noise due to resonance with airflow
Solution Approach 1:
The patent applies asymmetry by positioning the push element fixing seat eccentrically relative to the housing center. This creates an asymmetric structure where the push element is offset from the central airflow path, causing the valve body to tilt during operation. This tilting action disrupts the symmetric airflow pattern that causes resonance, thereby eliminating the whistling noise without requiring additional noise-reduction components.
Solution Approach 2:
The patent implements dynamics by allowing the valve body to tilt dynamically during operation through the eccentric mounting of the push element fixing seat. As air pressure builds during valve opening, the push element compresses and the eccentric configuration causes the valve body to tilt at different angles depending on the pressure state. This dynamic tilting adjusts the airflow path in real-time, preventing resonance conditions.
2Object-affected harmful factors
If existing noise-reduction solution is applied, then abnormal noise is eliminated, but the structure becomes complex with up to 16 parts and high assembly requirements
Solution Approach 1:
The patent merges the noise-reduction function into the existing valve structure by making the push element fixing seat eccentric relative to the housing. Instead of adding separate noise-reduction components, the eccentric configuration is integrated into the valve body design itself. This single structural modification combines the check valve function with noise elimination, reducing the total part count while maintaining effectiveness.
3Object-affected harmful factors
If existing noise-reduction solution is applied, then noise is reduced, but production cost increases due to complex machining and assembly
Solution Approach 1:
The eccentric positioning of the push element fixing seat creates an asymmetric structure that is simpler to manufacture than complex noise-reduction assemblies. The asymmetric design allows for standard machining operations rather than requiring specialized tools for deep-hole machining or complex assembly fixtures, thereby reducing manufacturing costs while eliminating noise.
4Object-affected harmful factors
If existing noise-reduction solution is applied, then abnormal noise is eliminated, but assembly process becomes difficult with high quality control requirements
Solution Approach 1:
By merging the noise-reduction function into the eccentric valve body structure, the patent reduces the number of assembly steps. The eccentric configuration is built into the valve body itself, eliminating the need for separate assembly of multiple noise-reduction components. This integration simplifies the assembly process and reduces quality control requirements compared to assembling 16 separate parts.
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
Effectively reduces abnormal noise at lower costs by changing the natural frequency and airflow state, simplifying the structure and assembly process.
Implementation Method 1
the push element, in addition to being compressed by an axial action, is also subjected to bending under the action of a bending moment
Implementation Method 2
The bending of the push element causes a central axis of the push element fixing seat of the eccentric valve body to form an included angle with a central axis (or line of force) of the housing
Implementation Method 3
When the two-way check valve is opened, the eccentric valve body is subjected to the action of air pressure to compress the push element by force
Implementation Method 4
The noise is caused by resonance between the two-way check valve and an air flow... The change in natural frequency and airflow state of the two-way check valve reliably avoids abnormal noise caused by the resonance with the airflow
Data Source
Figure 1
Figure 2~4
AI summary
The present invention provides an eccentric noise-reduction two-way check valve, comprising: a housing (1); an eccentric valve body (3) which is mounted in the housing (1) and comprises a push element fixing seat (31); and a push element (4) mounted on the push element fixing seat (31) and constructed to push the eccentric valve body (3) in a direction in which the two-way check valve is closed, wherein the push element fixing seat (31) is arranged to be eccentric relative to the housing (1). The present invention can quickly eliminate abnormal noise with lower costs, without adding additional parts.