Sealing device for a piston rod of a reciprocating compressor
US12326140B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2022 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Jan 19, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3252
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In order to provide a sealing device (15) for sealing a piston rod (8) of a reciprocating compressor (1), which provides good sealing properties at compressor standstill, which has a simple structure, which allows for a simple handling and which requires no external source of energy, the sealing device (15) comprises a number of first packing retainers (18), each retainer including a retaining opening (18a) in which a first packing ring (19) is arranged, a second packing retainer (20), including a retaining opening (20a) in which a second packing ring (21) is arranged, the second retainer (20) being positioned closer to the second axial device end (15b) than the number of first packing retainers (18) in an axial direction of the sealing device (15), wherein the second packing ring (21) is an uncut ring, comprising a continuous inner circumferential sealing surface (21a), wherein the second packing ring (21) is made from a material comprising a polymer, the material having a thermal expansion coefficient (α), which is at least two times higher than the thermal expansion coefficient (αFE) of iron, wherein at or below a defined activation temperature an inner diameter (d_i) of the sec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.