Scroll Fluid Machine Cylindrical Silencer Noise Reduction
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Solution Overview
Problem
Conventional scroll fluid machines experience noise issues due to gas discharge, which are mitigated by external silencers that increase machine dimensions, complicating handling and installation.
Innovation Solution
A cylindrical silencer is integrated between radial cooling fins, connected to the outlet and discharge holes, utilizing a small-diameter inflow hole and a large-diameter expansion hole to decompress gas and reduce noise, with an adjustable introduction tube for noise suppression across varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a silencer is installed externally on the discharge hole or exhaust joint, then noise is reduced, but the machine dimensions increase and handling becomes difficult
Solution Approach 1:
The silencer is merged with the housing structure by utilizing the space between radial cooling fins. The silencer is positioned within this existing structural gap, combining the noise reduction function with the housing's thermal management structure, thereby avoiding additional external volume while effectively suppressing discharge noise.
2Object-affected harmful factors
If a silencer is installed externally on the discharge hole or exhaust joint, then noise is reduced, but handling and installation become complicated
Solution Approach 1:
The silencer is integrated into the housing structure rather than being an external attachment. By positioning it within the space between radial cooling fins and securing it to the housing, the design eliminates the need for separate mounting operations, simplifying both handling and installation while maintaining noise reduction effectiveness.
3Volume of moving object
If the silencer is integrated between radial cooling fins, then machine dimensions are maintained, but space for noise reduction is limited
Solution Approach 1:
The silencer is designed with a specific structure adapted to the local space between radial cooling fins. The inflow hole connects to the discharge hole while the expansion hole provides volume for noise reduction within the constrained space. This localized design optimizes noise reduction effectiveness within the available dimensional constraints.
Solution Approach 2:
The silencer is nested within the housing structure, utilizing the space between radial cooling fins that would otherwise be empty. By positioning the silencer within this existing structural envelope, the design achieves noise reduction without adding external volume, effectively nesting the noise control function within the housing's thermal management structure.
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 integrated cylindrical silencer effectively reduces noise without altering the machine's dimensions, enhancing handling and installation while allowing for noise adjustments through axial positioning of the introduction tube.
Implementation Method 1
utilizing a small-diameter inflow hole and a large-diameter expansion hole to decompress gas and reduce noise
Data Source
AI summary
A scroll fluid machine comprises a housing, a drive shaft, a stationary scroll fixed to the housing, and an orbiting scroll driven by the drive shaft. A gas from the outer circumference of the housing is introduced between the stationary and orbiting scrolls, and sent to the center by revolving the orbiting scroll in engagement with the stationary scroll. On the rear surface of the stationary scroll, there are provided a plurality of cooling fins that radially extend. Between the adjacent cooling fins, a silencer is provided to prevent noise caused by discharge of the gas.