Compressor Seating Plate Hardness and Fixing for Valve Body Protection
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Solution Overview
Problem
Compressors with integral valve seats are prone to damage under severe conditions due to high differential pressures and rapid opening/closing speeds, and the valve seat's integration with other parts makes reinforcement or replacement difficult, leading to potential position shifts, deformation, and pressure loss.
Innovation Solution
A compressor design featuring a base portion with a discharge port, a valve body that elastically deforms to open the port under higher compression pressure, and a seating plate made of harder material than the base, which supports the valve body and is fixed to the base portion to prevent direct contact and potential damage, while also ensuring secure compressing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the valve seat is integrally formed with another part, then the structure is simplified, but it is not easy to reinforce or replace and position shift or deformation is likely to occur
Solution Approach 1:
The valve seat is separated from the base portion and formed as an independent component. This segmentation allows the valve seat to be manufactured separately with precise dimensional control, then assembled to the base portion using fixing portions that prevent position shift and deformation while maintaining structural integrity.
2Productivity
If the valve body repeatedly abuts against the valve seat to open and close the discharge port, then the discharge function is achieved, but impact fretting wear and damage are likely to occur under severe conditions
Solution Approach 1:
The valve seat is designed with enhanced hardness and structural support through the fixing portions that attach it to the base portion. This beforehand reinforcement prepares the valve seat to withstand repeated impact loads from the valve body under severe operating conditions, preventing damage before it occurs.
3Reliability
If the seating plate is made of harder material than the base portion, then damage to the base portion is prevented, but manufacturing complexity increases
Solution Approach 1:
The seating plate is manufactured as a separate component with harder material properties than the base portion. This segmentation allows selection of optimal materials for each component based on their specific functional requirements, with the seating plate using harder material for wear resistance while the base portion uses more ductile material for structural integrity.
4Reliability
If the seating plate is fixed to the base portion at positions on both sides of the extension direction with respect to the center of the through-hole, then position shift and floating are prevented, but the number of fixing portions increases
Solution Approach 1:
The fixing portions are strategically positioned at specific locations on the seating plate - on both sides of the extension direction with respect to the center of the through-hole. This localized placement provides optimal stability and prevents position shift and floating under pressure, while minimizing the total number of fixing portions needed.
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 solution prevents damage to the compressor components under severe conditions, secures compressing performance, and simplifies the structure by sharing fixing means with the valve body, while minimizing pressure loss and maintaining sealability.
Implementation Method 1
a valve body (25) having one end, which is fixed to the base portion (15a, 17a), and the other end, which opposes the base portion (15a, 17a) to close the discharge port (15c, 17c), in which the other end elastically deforms to open the discharge port (15c, 17c) when a pressure of the compression side becomes higher than a pressure of the discharge side
Data Source
Figure 1
Figure 2A~3
Figure 4~5
AI summary
This compressor is provided with a seating plate (28) disposed between a base (15, 17) and a valve body (25) and in contact with the surface of the valve body (25), which faces the base (15, 17), to support the valve body (25). The seating plate (28) consists of a harder material than the base (15, 17) and has: a through-hole (28a) corresponding to a discharge port (15c, 17c); and a plurality of affixation sections (28b, 28c) for affixing the seating plate (28) to the base (15, 17), the plurality of affixation sections (28b, 28c) being provided on both sides of the center of the through-hole (28a) in the direction of extension.