US 12,435,716 B2
Pressure packing for a reciprocating piston compressor with buffer gas barrier
Andreas Brandl, Vienna (AT); John Warner Ladd, Vienna (AT); Karl Richard Markey, Vienna (AT); Guido Pratelli, Vienna (AT); and Patrick James Raffety, Vienna (AT)
Assigned to Hoerbiger Wien GmbH, Vienna (AT)
Filed by Hoerbiger Wien GmbH, Vienna (AT)
Filed on May 9, 2022, as Appl. No. 17/740,323.
Prior Publication US 2023/0358226 A1, Nov. 9, 2023
Int. Cl. F04B 53/02 (2006.01); F04B 49/22 (2006.01); F04B 53/06 (2006.01); F04B 53/16 (2006.01)
CPC F04B 53/02 (2013.01) [F04B 49/22 (2013.01); F04B 53/06 (2013.01); F04B 53/164 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A pressure packing for a reciprocating piston compressor, the pressure packing comprising
a buffer gas barrier at a low-pressure side of the pressure packing, the buffer gas barrier including a buffer gas volume;
a number of sealing rings at an opposite high-pressure side of the pressure packing;
a vent volume between the buffer gas barrier and a last sealing ring of the number of sealing rings before the buffer gas barrier;
a vent line connected to the vent volume;
wherein the vent line is provided for a flow of gas therethrough to drain gas from the vent volume;
a buffer gas feeding line connected to the buffer gas volume of the buffer gas barrier;
wherein the pressure packing is configured and arranged during operation to supply a buffer gas with buffer gas pressure into the buffer gas volume via the buffer gas feeding line, wherein the buffer gas pressure is higher than a vent pressure in the vent volume;
a sensing line separated from and not branched-off the vent line,
wherein the sensing line is connected at a first end to the vent volume with an opposite second end of the sensing line being closed,
wherein the vent volume is connected to the vent line and to the sensing line,
wherein the sensing line is configured and arranged so that no gas flows from the first end connected to the vent volume out of the opposite second end while there is gas flow through the vent line; and
a pressure regulator connected to the buffer gas feeding line, the pressure regulator configured and arranged to thereby set the buffer gas pressure in the buffer gas feeding line;
wherein the pressure packing is further configured and arranged during operation to use a pressure in the sensing line as pilot pressure for the pressure regulator to thereby set the buffer gas pressure.