Packing case with composite rings

CA3324586A1Pending Publication Date: 2025-09-25DOVER PUMPS & PROCESS SOLUTIONS SEGMENT INC
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Patent Information

Application Number
CA3324586
Authority / Receiving Office
CA · CA
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-19
Filing Date
2025-03-19
Publication Date
2025-09-25

AI Technical Summary

Technical Problem

High differential pressures in high-pressure gas processing equipment, such as reciprocating compressors, lead to increased wear on seals, reduced reliability, and undesired gas emissions, making it difficult to maintain effective sealing.

Method used

A packing case with composite backup rings, comprising segments of different materials, is used to inhibit extrusion and enhance sealing, featuring inner regions of non-metallic materials like polymers and outer regions of metals, with specific activation pressures for each ring to manage varying operational pressures.

Benefits of technology

The solution promotes longer run life of compressor systems, reduces lubrication needs, minimizes seal wear, and enhances rigidity and heat transfer, thereby improving sealing efficiency and reducing emissions.

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Abstract

A packing case for a gas compressor includes two or more progressive seals. At least one of the two or more progressive seals includes a packing cup, one or more seal rings at least partially disposed in the packing cup, and one or more backup rings. At least one of the seal rings includes two or more segments each including a pair of opposing ends. The ends of each pair of the adjacent segments define a joint between the segments. At least one of the backup rings including two or more regions. At least one of the regions includes a different material than at least one of the other regions.
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