Multi-Level Reed Valve Assembly With Low Clearance Volume
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Solution Overview
Problem
Existing valve assemblies in reciprocating compressors have a low effective flow area, leading to reduced volumetric efficiency and increased heat due to trapped gas, which affects overall operating efficiency.
Innovation Solution
A stacked valve assembly design with multiple levels of reed valve modules, where each level is offset to maximize packing density and flow area, reducing clearance volume and enhancing fluid flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple valve modules are arranged in a single level, then the effective flow area is limited, but the device complexity remains low
Solution Approach 1:
The patent transitions from a single-level arrangement to a multi-level stacked arrangement of valve modules. The first and second levels are positioned at different heights relative to the seat plate, with seating faces on different planes. This vertical dimensionality change allows the effective flow area to increase from approximately 10-16% to 40-50% of the cylinder opening area, while the modules remain contained within a compact vertical space.
Solution Approach 2:
The valve modules are arranged in nested levels where the second level is positioned above the first level relative to the seat plate. The modules at different levels are offset from each other, allowing them to nest within the vertical space without interfering with each other's flow paths. This nesting approach maximizes the use of available space while maintaining low device complexity.
2Area of stationary object
If radial valves or double-decker valves are used to increase effective flow area, then the flow area increases, but clearance volume increases significantly
Solution Approach 1:
Instead of expanding the valve assembly radially outward (which increases clearance volume), the patent stacks valve modules vertically in multiple levels. The first level is positioned below the seat plate and the second level above it, utilizing the vertical dimension to increase effective flow area without increasing the radial clearance volume that would interfere with piston motion.
Solution Approach 2:
The valve assembly is segmented into multiple discrete valve modules arranged in separate levels. Each module can be independently positioned at different heights and offsets, allowing the effective flow area to be increased by adding modular units vertically rather than expanding horizontally, thus avoiding increased clearance volume.
3Productivity
If more valve modules are added to increase effective flow area, then the flow area increases, but the device complexity increases
Solution Approach 1:
Multiple valve modules are nested in a compact stacked arrangement where modules at different levels are offset from each other. This nesting allows many modules to be contained within a small vertical space, increasing the effective flow area and volumetric efficiency without proportionally increasing device complexity. The modular design also facilitates ease of assembly and maintenance.
Solution Approach 2:
The patent utilizes the vertical dimension to arrange valve modules in stacked levels rather than spreading them out horizontally. This compact vertical stacking increases the effective flow area within a confined space, improving volumetric efficiency while keeping the overall device footprint and complexity manageable through systematic vertical organization.
Data Source
AI summary
A valve assembly includes a seat plate having a top surface and a bottom surface, a plurality of first valve modules arranged in a first level relative to the seat plate such that a first seating face of each of the plurality of first valve modules is substantially co-planar with a first plane that is substantially parallel to at least one of the top surface and the bottom surface of the seat plate, and at least one second valve module arranged in a second level relative to the seat plate such that a second seating face of the at least one second valve module is co-planar with a second plane that is substantially parallel to the first plane, wherein the second plane is offset from the first plane by a first distance.