Sealing device for a piston rod of a reciprocating compressor
US12359723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2022 |
| Grant date | Jul 15, 2025 |
| Priority date | — |
| Expiry date | Mar 5, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/40
- 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) at compressor standstill, which enhances the safety of operation, 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 (15a) 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), the second packing ring (21) being configured to seal the piston rod (8) at standstill of the compressor (1), wherein the sealing device (15) further comprises a support passage (28) having a first support passage end (28a), a second support passage end (28b) and a valve (29) for opening and closing the support passage (28), the support passage (28) being configured to vent at least a gas, leaking from the first axial device e…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.