Gas Governor Chamber Layout for Noise and Pressure Stability
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Solution Overview
Problem
Conventional gas governors either increase the number of parts to suppress governor sound or lead to unstable secondary gas pressure due to vortex formation and uneven gas flow, resulting in irregular valve movements and instability.
Innovation Solution
A gas governor design featuring an auxiliary chamber in the secondary pressure chamber, separated by a wall positioned away from the outflow port, which communicates with the main chamber through a passage, equal in distance and curvature to the outflow port, to shift the natural frequency and stabilize gas flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cylindrical weight is added to damp oscillation and suppress governor sound, then governor sound is suppressed, but the number of parts increases and cost increases
Solution Approach 1:
The invention extracts the harmful oscillation phenomenon and addresses it by modifying the secondary pressure chamber structure (adding recesses) rather than adding a separate damping component. This removes the need for the cylindrical weight while still achieving oscillation suppression.
Solution Approach 2:
The invention changes the geometric parameters of the secondary pressure chamber by adding recesses to its peripheral wall. This structural parameter change alters the natural frequency of the chamber to avoid resonance with the governor valve oscillation, suppressing governor sound without adding parts.
2Object-affected harmful factors
If the peripheral wall of the secondary pressure chamber is recessed to enlarge volume and shift natural frequency, then governor sound is suppressed and cost is reduced, but gas flow becomes uneven and vortexes form causing unstable secondary gas pressure
Solution Approach 1:
The invention applies local quality by creating specific recesses at predetermined positions on the peripheral wall of the secondary pressure chamber. These localized structural modifications shift the natural frequency to suppress governor sound while the positioning and dimensions are controlled to minimize negative impacts on gas flow uniformity.
Solution Approach 2:
The invention carefully controls the parameters of the recesses (depth, width, position) to achieve the desired shift in natural frequency for suppressing governor sound, while maintaining gas flow characteristics that prevent excessive vortex formation and preserve secondary gas pressure stability.
3Productivity
If gas flows pass through clearance between valve body part and valve seat, then gas pressure regulation is achieved, but oscillation causes contact and sound source generation leading to resonance
Solution Approach 1:
The invention changes the natural frequency parameter of the secondary pressure chamber by modifying its structure (adding recesses), thereby shifting it away from the oscillation frequency of the governor valve. This prevents resonance between the sound source from valve contact and the chamber, suppressing governor sound while maintaining gas pressure regulation function.
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 effectively suppresses governor sound without increasing parts and stabilizes secondary gas pressure by ensuring equal gas flow and preventing vortex influences, thus maintaining consistent valve operation.
Implementation Method 1
the governor sound is suppressed by shifting the natural frequency of the secondary pressure chamber from the frequency of the above-mentioned sound source
Implementation Method 2
fluctuation of a gas pressure in the secondary pressure chamber, i.e., fluctuation of a secondary gas pressure, is suppressed by displacing the governor valve through the diaphragm corresponding to gas pressure fluctuation in the primary pressure chamber
Data Source
AI summary
In a gas governor, an auxiliary chamber divided by a separating wall from a main chamber that is a portion of the secondary pressure chamber is provided in the secondary pressure chamber, the auxiliary chamber communicates with the main chamber through a communicating passage, the separating wall is positioned at a portion away in a circumferential direction from an outflow-port opened portion that is a peripheral wall portion of the secondary pressure chamber, in which the outflow port is opened, and the separating wall is provided so that a distance from a valve hole and a curvature in the circumferential direction of at least an end portion of the separating wall, which is close to the valve seat, are equal to those of an end portion of the outflow-port opened portion, which is close to the valve seat.