Oil wiper packing
AssigneeBurckhardt Compression AG
InventorNorbert Feistel
Life of this patent
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Abstract
An oil wiper packing for a piston rod of a crosshead piston compressor, and corresponding assembly method. The oil wiper packing has at least one chamber disc having a chamber disc cutout, wherein a wiper ring arranged in the chamber disc cutout. At least two chamber discs, each having a chamber disc cutout, are arranged in succession in a direction of extent (L), and a single wiper ring is in each chamber disc cutout. Each wiper ring has no play or only negligible play in the direction of extent (L) in the operating state but is movable in the radial direction. It is necessary to set the play in in the cold state during the assembly of the wiper rings. Such an arrangement allows advantageous wiping of oil, preventing oil from spreading in the direction of extent of the piston rod.
Claims16
An oil wiper packing for a piston rod of a crosshead piston compressor, configured to wipe away lubricant from the piston rod on the crosshead side, comprising:
- a plurality of chamber discs, each chamber disc having a chamber disc recess and a partition wall with a bore, wherein the partition wall laterally delimits the chamber disc recess, and wherein the bore is provided for passage of the piston rod, and
- a plurality of wiper rings each arranged in the chamber disc recess,
- wherein at least two chamber discs, which each have a chamber disc recess and a single partition wall, are arranged successively in a running direction (L), and having only a single wiper ring is arranged in each of the two chamber disc recess, and wherein the at least two chamber discs are arranged in the same orientation in the running direction (L),
- wherein the single wiper rings each have a single wiper blade in the running direction (L) for contacting the piston rod, wherein the chamber disc recess has a chamber interior height (K1) in the running direction (L), that the wiper ring has a wiper ring height (H1) in the running direction (L), and that at ambient temperature, the chamber interior height (K1) is between 0 mm and 0.5 mm larger than the wiper ring height (H1), and wherein the wiper rings of at least two successive pairs of wiper ring and chamber disc succeeding each other in the running direction (L) have a different play.
A method for installing an oil wiper packing in a crosshead piston compressor, wherein the crosshead piston compressor comprises a piston rod extending in a running direction (L),
- wherein
- in a first method step, assembling an oil wiper packing having a plurality of chamber discs each with a chamber disc recess and having each a partition wall with a bore, and having only a single wiper ring having a wiper blade for contacting the piston rod is arranged in the chamber disc recess, wherein the chamber disc recess is laterally delimited by the partition wall, wherein at least two chamber discs with only a single wiper ring arranged in each chamber disc are arranged successively in a running direction (L) in the same position, and the chamber discs are connected together, wherein each of the chamber disc recesses has a chamber interior height (K1) in the running direction (L), that each of the wiper rings has a wiper ring height (H1) in the running direction (L), and that each wiper ring and each chamber disc recess are combined such that at ambient temperature, the chamber ring interior height (K1) is between 0 mm and 0.5 mm greater than the wiper ring height (H1), and wherein the wiper rings of at least two successive pairs of wiper ring and chamber disc succeeding each other in the running direction (L) have a different play, and
- in a second method step, arranging the preconfigured oil wiper packing on the piston rod form movement in the running direction (L) such that the piston rod runs through a respective bore of the partition wall, and the chamber disc and the wiper ring surround the piston rod.
Dependencies are inferred from the claim text.