Piston Compressor Valve Layout for Higher Flow With Low Dead Volume
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Solution Overview
Problem
Existing piston compressors face challenges in optimizing the flow area of suction and discharge valve sections, leading to increased dead volume and reduced volumetric and isentropic efficiencies, particularly in high-temperature applications.
Innovation Solution
The implementation of a valve arrangement with a frustopyramidal or frustoconical suction valve section and a perpendicular discharge valve section, incorporating self-actuated check valves and finger blades to enhance fluid communication without significantly increasing dead volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flow area in suction and discharge valve sections is increased, then fluid flow performance is improved, but dead volume increases and volumetric efficiency decreases
Solution Approach 1:
The suction valve section is designed with a frustopyramidal form, transitioning from a conventional flat or simple curved shape to a three-dimensional truncated pyramid structure. This dimensional change allows the valve section to provide increased flow area through its inclined surfaces while maintaining a compact volume, thus improving fluid flow performance without significantly increasing dead volume and preserving volumetric efficiency.
2Area of stationary object
If the suction valve section uses a frustopyramidal form, then available flow area is improved, but device complexity increases
Solution Approach 1:
The frustopyramidal form of the suction valve section utilizes smooth curved surfaces transitioning from the cylindrical working chamber to the discharge valve section. This curved geometry, rather than sharp angular transitions, simplifies manufacturing while providing increased flow area through the inclined surfaces, thus improving available flow area without excessively increasing device complexity.
Data Source
Figure 1
Figure 2a~2b
Figure 2c~2d
AI summary
A cylinder head (400, 4000) for a piston compressor, the cylinder head (400, 4000) comprising a suction valve section (200, 2001), a discharge valve section (300, 3001), and an extended cup (500, 5001) forming a discharge channel (510, 5101), wherein the extended cup (500, 5001) comprises a plurality of discharge valve section bolt bosses (520) each configured to receive a discharge valve section bolt to secure a top plate (600) to the cylinder head (400, 4000) in use.