Fluid Machine Valve Retainer Design for Vibration Reduction
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Solution Overview
Problem
Existing fluid machines, such as compressors, face challenges in reducing vibration and delay of closing of the discharge valve due to inadequate surface contact between the valve retainer and the valve seat plate, leading to inefficiencies and reliability issues.
Innovation Solution
A fluid machine design featuring a valve retainer with an inclined surface facing the valve seat plate, where the open end side is closer to the port portion and the fixed end side is farther away, allowing for surface contact with the valve seat plate and reducing vibration and delay in valve closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the valve retainer is inclined so that the open end side recedes from the discharge valve (PTL 1), then the valve structure is simplified, but the discharge valve and valve retainer are not brought into surface contact, causing insufficient vibration reduction
Solution Approach 1:
The valve retainer is designed with different surface characteristics in different regions: an inclined surface in the upper portion that recedes from the discharge valve, and a contact surface in the lower portion that is substantially parallel to the discharge valve. This local differentiation allows the upper portion to simplify the valve structure while the lower portion ensures surface contact for vibration reduction.
2Device complexity
If the valve retainer is horizontally provided above the discharge port (PTL 2), then the valve structure is simplified, but the discharge valve and valve retainer are not brought into surface contact, causing insufficient vibration reduction
Solution Approach 1:
The valve retainer combines a horizontal configuration for structural simplicity with a localized contact surface that is substantially parallel to the discharge valve. This contact surface is positioned in the lower portion of the valve retainer, ensuring surface contact between the discharge valve and valve retainer while maintaining the overall horizontal structure.
3Device complexity
If the valve retainer contact surface is positioned too far from the discharge valve, then the valve structure is simplified, but the delay of closing of the discharge valve increases
Solution Approach 1:
The valve retainer is positioned in two different spatial dimensions: the upper portion recedes from the discharge valve in the vertical direction to simplify the structure, while the lower contact surface is positioned close to the discharge valve in the horizontal direction to minimize closing delay. This multi-dimensional positioning resolves the contradiction between structural simplicity and timing performance.
Data Source
AI summary
A fluid machine includes a piston, a valve seat plate, a valve, and a valve retainer that reduces an opening amount of the valve. One end of the valve retainer is fixed with a fastener together with the valve to the valve seat plate. The fastener spans through the one end of the valve retainer and the valve to thereby fasten the one end of the valve retainer and the valve to the valve seat plate. A second end of the valve retainer that is opposite to the one end does not contact the valve seat plate.