Pistons for machines for fluids such as hydrogen and machines for fluids including such pistons
Non-uniform flow path cross-sections and stage volumes in pistons for fluid machines address the issue of premature seal failure by uniformly distributing pressure, enhancing seal durability and reducing leakage.
JP2026520169APending Publication Date: 2026-06-22LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
- Filing Date
- 2024-05-30
- Publication Date
- 2026-06-22
Smart Images
Figure 2026520169000001_ABST
Abstract
The present invention relates to a piston (3) for a machine (1) for cryogenic fluids such as liquid hydrogen or fluids under high pressure, comprising a body (31) mounted inside a sleeve (2) of the machine (1) for fluids to reciprocate and move relative to one another, and together with the sleeve (2) intended to form a chamber (4) for compressing or pumping the fluid, and also comprising a plurality of peripheral sealing gaskets (5) arranged in series in the longitudinal direction (X) of the piston (3), wherein the gaskets (5) between them define a range of stages (6) in the longitudinal direction (X) of the piston (3), and at least two of the plurality of gaskets (5) each include a flow section (51) intended to allow fluid to flow between the stages (6), wherein all or part of the stages (6) have a non-uniform volume in the longitudinal direction (X).
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