Burckhardt Compression Ag

Norbert Feistel

Alexandre Voser

Pascal De Lapersonne

Georg Samland

Andreas Allenspach

A throttle arrangement for sealing a sliding surface of a body in a piston compressor the throttle arrangement having annular sealing discs and a sealing disc holder having an L-shaped radial section having a first leg running in the axial direction and a second leg running transversely, the second leg being annular and having a bearing surface pointing in the direction of the high-pressure side, the sealing discs are stacked one on top of one another axially, the first leg being cylindrical extending from the bearing surface toward the high-pressure side, the axial height of the first leg Hallow bearing surface to have axial play, the first leg gas passage openings, the first leg having a boundary surface facing in the sealing discs, aligned coaxially with the first limb and the body, a first annular gap RSis formed between the boundary surface and the sealing discs.

Throttle arrangement for piston compressors

Piston ring having a first annular body and a second annular body, which annular bodies, are arranged adjacent to and concentric with one another in the axial direction (A), the first annular body having a radially outwardly directed outer side, an upper and a lower flank and a radially inwardly directed inner side, the second annular body being designed as a segmented sealing ring having a plurality of sealing ring segments, which sealing ring segments each have a radially outwardly directed sealing surface, an up-per and a lower sealing ring segment flank and a radially inwardly directed inner side, the sealing ring segments each being guided on the first annular body by means of at least one guide means, which guide means substantially prevent twisting of the sealing ring segments against the first annular body in the circumferential direction (U) and permit displacement of the sealing ring segments transversely to the axial direction (A).

Piston ring for a piston compressor

Throttle ring for a piston compressor, the throttle ring comprising an axially running ring axis (Ar), an axial height (h), a radially inner running surface and a radially outer circumferential surface, and an upper flank and a lower flank, wherein the upper flank faces the compression space of the piston compressor when the throttle ring is in intended use. The running surface has at least one circumferential groove in the circulating direction, which is connected to the radially outer circumferential surface by at least one radial bore.

Throttle ring

A method for monitoring the condition of a piston rod sealing system of a piston compressor, the system having at least two annular chambers arranged one behind the other in a longitudinal direction and each having a sealing element arranged therein. A piston rod running through the sealing elements and the annular chambers is moved back and forth in the longitudinal direction, sealed by the sealing elements. The system has an inlet side and an outlet side, between which a difference in pressure occurs, and said difference in pressure has static and dynamic pressure component. When there is leakage gas in the annular chambers, at least the dynamic pressure component of the leakage gas is measured in the piston rod sealing system. A change in the condition of at least one of the sealing elements is determined from a change in the dynamic pressure component as a function of time.

Method and device for monitoring the condition of a piston rod sealing system of a piston compressor

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.

Oil wiper packing

Piston ring having an endless base ring and sealing ring have a radially outwardly directed base ring face side. The sealing ring has a radially inwardly directed, circularly running sealing ring inner side with three tangential cuts separating three sealing ring segments are arranged in a circumferential direction (U). The base and sealing rings are arranged in succession in a longitudinal direction (L). A top ring is arranged to adjoin the sealing ring having a top ring has a radially outwardly directed top ring outer side and a radially inwardly directed top ring inner side. The top ring has, on the side opposite the sealing ring, a radially running return flow channel extending radially, the sealing face side protrudes in a radial direction beyond the top ring outer side and the base ring face side. The base and the top rings have a greater tensile strength than the sealing ring.

Piston ring for a piston compressor, and piston compressor

The invention relates to a sealing assembly () for sealing a piston rod () of a piston compressor, which piston rod extends in an axial direction (A) and can be moved back and forth in the axial direction (A). Said sealing assembly () comprises at least one packing chamber (), wherein the packing chamber () is bounded in the axial direction (A) by a first and a second side wall (), wherein at least one sealing ring () or one scraping ring () and a spring device () are arranged in the packing chamber (), and wherein a spring device () and at least one sealing ring () or one scraping ring () are arranged one after the other in the axial direction (A) proceeding from the first side wall (), wherein the sealing ring () or the scraping ring () lies against the second side wall (), and wherein the spring device () is designed as a magnetic spring and consists of two assemblies () spaced apart in the axial direction (A), a first assembly () and a second assembly (), wherein each assembly () comprises at least one magnet (), and wherein the magnets () are arranged in the two assemblies () in a mutually matched manner in such a way that the two assemblies () repel each other.

Sealing assembly and method for the operation thereof

The dry-running piston rod packing for sealing a piston rod supported in such a way that the piston rod can be moved in a longitudinal direction (L) having at least one chamber ring, a sealing chamber, and a sealing ring arranged in the sealing chamber, wherein the piston rod packing has a high-pressure side and a low-pressure side, wherein a lift-off device is designed and arranged in such a way that the lift-off device can lift and lower the sealing ring in the longitudinal direction (L).

Dry-running piston rod packing and method for operating a dry-running piston rod packing

The invention relates to a sealing ring () for sealing a piston rod comprising a retaining ring () having a circular inside diameter (M) and a center axis (M) and comprising a plurality of sealing segments (), which are supported in the retaining ring () in such a way that the sealing segments can be moved in a direction radial to the center axis (M), wherein each sealing segment () has a sealing surface () that is oriented toward the center axis (M) and that extends in a curved manner in a circumferential direction (U) with respect to the center axis (M), and wherein each sealing segment () has two lateral sealing-segment guiding surfaces () extending parallel to each other, wherein the sealing surface () ends at one of the two sealing-segment guiding surfaces () at both ends, and wherein the retaining ring () comprises a plurality of guiding segments () arranged at a distance from each other in the circumferential direction (U), wherein each two guiding segments () following each other in the circumferential direction (U) have guiding surfaces () that face each other and that extend parallel to each other, said guiding surfaces being arranged at a distance from each other in such a way and being designed in such a way that, by means of the sealing-segment guiding surfaces () of the sealing segment, the sealing segment () is guided on the two lateral guiding surfaces () and is supported on the two lateral guiding surfaces in such a way that the sealing segment can be moved in the radial direction (R), wherein guiding segments () and sealing segments () are arranged in succession in the circumferential direction (U).

Sealing ring

The oil control ring () extends in a circumferential direction () about a center () and has a longitudinal axis () that passes through the center (), wherein the oil control ring () has an end face () that faces the center (), and wherein the oil control ring () has a first lateral surface (), a second lateral surface (), and an outer surface () facing away from the center (), wherein the oil control ring () has a plurality of channels () extending toward the center () on the first lateral surface (), said channels being arranged at mutual distances in the circumferential direction () and extending over the entire width of the first lateral surface () in the radial direction and thereby forming a fluid-conducting connection between the end face () and the outer surface (), and wherein crown parts () extending in the circumferential direction () are arranged between pairs of channels (), wherein each crown part () protrudes beyond the respective channel () in the direction of extent of the longitudinal axis () and forms a lateral channel surface () for the channel (), wherein at least one of the crown parts () is designed as a long crown part () and extends over an angular range (&#x3b1;) between 60 degrees and 350 degrees in the circumferential direction (). 212&#xd7;2121.

Oil scraper ring

The oil control ring () comprises a retaining ring () and a scraper () having a scraper fin (), wherein the scraper () is arranged in the retaining ring () in such a way that the scraper fin () is oriented towards the center () of the oil control ring () in order to scrape oil on a piston rod (). The scraper () comprises a plurality of scraper segments () which are arranged in succession in the circumferential direction () of the oil control ring (), and the retaining ring () has a groove () for accommodating the scraper segments () in a positive manner, and the retaining ring () has an abutment point (). The retaining ring () forms at least one plastic first end face () which is oriented towards the center () of the oil control ring (). The scraper () is made of a harder material than the plastic forming the first end face (), the scraping fin () of the scraper () has a contact point () oriented towards the center () and the scraper () and the retaining ring () are adapted to each other in such a way that both the at least one first end face () and the contact point () can lie against the piston rod ().

A piston ring for a reciprocating compressor is disclosed, including a one-part annular sealing ring with an arcuate outer surface and having a gap between butt ends of the sealing ring. A joint seal seals the gap symmetrical, having two limbs that extend at both sides in the peripheral direction over an angular range of 20&#xb0; to 180&#xb0; and having a radially outwardly directed, arcuate limb outer face. The joint seal includes a contact part that extends at both sides in the peripheral direction and projects beyond the limbs in the axial direction. The sealing ring and the joint seal are adapted to each other such that, when assembled, the joint seal rests laterally against the sealing ring via a stop and runs along the gap and covers same in the peripheral direction.

Piston ring

The seal arrangement () for piston compressors comprises a deformable ring support () and a first and a second endless sealing ring (), wherein the ring support () has a longitudinal axis (L) which extends perpendicularly with respect to its circumferential direction, and wherein the ring support () has a gap () with play in its circumferential direction, and wherein each sealing ring (3) has a longitudinal axis () which extends perpendicularly with respect to its circumferential direction, and wherein the sealing rings () are arranged in such a way that the ring support () encloses them from the outside, and wherein the two sealing rings () are arranged next to one another in the direction of extent of the longitudinal axis (L), and wherein the ring support () and the sealing rings () are designed to be adapted to one another in such a way that the first sealing ring () bears on one side against a first side wall () of the ring support () and forms a first gap (S) to the ring support () on the opposite side with regard to the longitudinal axis () of the first sealing ring (), and wherein the second sealing ring () bears in a diametrically opposed manner on one side against a second side wall () of the ring support () and forms a second gap (S) to the ring support () on the opposite side with regard to the longitudinal axis () of the second sealing ring (), wherein the first and second side walls () are arranged so as to lie opposite one another with regard to the longitudinal axis (L), with the result that the ring support () can in each case bring about a prestressing force () on the first and second sealing rings () respectively via the first and second side walls () respectively, wherein the prestressing forces () extend in an opposed manner.

Seal arrangement

The invention relates to a dry-running piston rod sealing arrangement () for sealing a piston rod () mounted in a longitudinally displaceable manner. The sealing arrangement comprises at least one sealing ring () having a sealing surface (), an actuator (), a sensor (), and a chamber ring () containing the sealing ring (). The actuator () comprises an active connection in relation to the sealing ring (), such that the sealing surface () can be radially displaced in relation to the piston rod (). The actuator () can be controlled according to a measuring value detected by the sensor ().

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Ellikon a.d. Thur, Switzerland

Norbert Feistel