Abstract: 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 H4 allow 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 RS1 is formed between the boundary surface and the sealing discs.

Abstract: 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).

Abstract: 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.

Abstract: 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.

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.

Abstract: The piston ring assembly having a first and a second endless sealing ring and an elastic ring carrier, the first and the second sealing ring extending in a circumferential direction (U) and each having an outer circumferential surface, the first sealing ring having a first center point (M1) with respect to its outer circumferential surface and the second sealing ring having a second center point (M2 ) with respect to its outer circumferential surface, the first and second sealing rings each having a longitudinal axis (L) running perpendicular to the circumferential direction (U), wherein the ring carrier runs in the circumferential direction (U), and wherein the ring carrier and the first and second sealing rings are designed to be mutually adapted in such a way that the first and second sealing rings are arranged one after the other in the ring carrier in the direction of the longitudinal axis (L), and in that their first and second centers (M1, M2) are arranged at a distance from one another radially with r

Abstract: Fuel gas supply system for supplying a high-pressure gas injection engine with gas stored in a liquefied gas tank, preferably an LNG tank, having a high-pressure pump to which liquefied gas is supplied. The system including a condenser with a high-pressure heat exchanger, a high-pressure vaporizer which is connected to the high-pressure pump via the high-pressure heat exchanger and is arranged downstream of the condenser. Gas fed to the high-pressure gas injection engine downstream of the high-pressure evaporator. A compressor to which boil-off gas is fed is connected downstream to the condenser via an inlet. A condensation core generator to which liquid gas is supplied from the high-pressure pump in such a manner that the condensation nuclei generated by the condensation nucleus generator promote condensation of the supplied boil-off gas. The liquid gas formed in the condenser is supplied to the high-pressure pump and/or to the liquid gas tank.

Abstract: Poppet valve, plate valve, with a longitudinal axis (L), with a valve seat having a plurality of valve seat passage channels, with a catcher arranged at a distance from the valve seat in the direction of the longitudinal axis (L), and with a sealing element arranged movably between the valve seat and the catcher for opening and closing the valve seat passage channels. One of the valve components formed as the valve seat or the catcher having a plurality of passage channel limiting sections and a plurality of web portions, each extending mutually at an angle (?), wherein at least one of the valve components formed as valve seat or catcher is produced at least in sections by additive manufacturing, and wherein at least one of the passage channel limiting sections is dimensioned shorter in the direction of the longitudinal axis (L).

Abstract: A method for expanding a compressed gas (GD) at a gas pressure (pD) with a reciprocating-piston machine, wherein the reciprocating-piston machine includes a piston that can move to and fro and a working chamber delimited by the movable piston. The method being carried out as follows: the compressed gas (GD) is supplied to the working chamber via an actuatable rotary slide valve, wherein the compressed gas (GD) in the working chamber is expanded in the working chamber.

Abstract: The packing seal for a piston compressor, having a longitudinal axis L as well as, following one after the other in the direction of the longitudinal axis L, a fastening part and a cylindrical part, wherein a magnetic bearing and at least one chamber ring with a sealing ring arranged therein are arranged following one after the other in the direction of the longitudinal axis L in the cylindrical part, wherein the magnetic bearing includes at least one controllable electromagnet.

Abstract: The piston compressor for compressing a gas having a cylinder and also including a piston, a piston rod, packing, a crosshead and a drive, wherein: the piston is disposed for movement in a longitudinal direction L inside the cylinder; the piston is connected to the crosshead by means of a piston rod; packing is disposed between the piston and the crosshead, through which packing the piston rod runs; the crosshead is driven by the drive; in addition an activatable magnetic bearing is disposed between the piston and the crosshead; the magnetic bearing can generate a magnetic force Fm on the piston rod, at least perpendicularly to the longitudinal direction L; and an activation device activates the magnetic force Fm generated by the magnetic bearing on the piston rod.

Abstract: An automatic plate valve having a valve seat, a valve guard, a longitudinal axis (L) and a valve element arranged between the valve seat and the valve guard and movable along the longitudinal axis (L). The valve seat includes an end face having with valve seat openings oriented towards the valve guard, and a plurality of passages, which have a fluid-conducting connection to the valve seat openings. The valve element includes sealing element interacting with the valve seat openings. Wherein some of the passages have a different distance to the longitudinal axis in a radial direction (R). The end face of the valve seat including a plurality of grooved recesses, forming valve seat openings, with passages open into the same recess, the passages forming a fluid-conducting connection to the valve seat opening. Some of these passages connected to the valve seat opening have different distances to the longitudinal axis.

Abstract: The present invention relates to a sealing element and/or a support ring, in particular for a reciprocating compressor, manufactured by compression molding of a mixture of chips of carbon fiber-reinforced composite material, wherein at least part of the chips contains carbon fibers having a length of 3 to 20 mm, and wherein the carbon fibers in the sealing element and/or support ring have a random fiber orientation.

Abstract: 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.

Abstract: Seat valve, with a valve body having a plurality of inlet channels, with a plurality of closing elements arranged movably in a longitudinal direction L, each inlet channel being assigned a closing element for opening and closing the inlet channel, with a closing spring assigned to each closing element. The closing spring applies a prestressing force to the respective closing element to close the inlet channel. Each closing element assigned a braking device which is arranged separately from the closing element and which gradually brakes an opening movement of the closing element when the inlet channel is opened, independently of the closing spring. The braking device having a stop body with a stop surface against which the closing element can be brought to bear after an opening movement when the inlet channel is opened, the stop body being arranged movably and/or yieldingly in the opening direction of the closing element.

Abstract: A filler particle containing fibres, in which two or more fibres are enclosed at least partially in a solid particle made of a polymer selected from the group consisting of polyphenylene sulfides, liquid-crystal polymers, polyphenylene sulfones, polyether sulfones, thermoplastic polyimides, polyamide-imides, epoxy resins, perfluoroalkoxy polymers and any mixtures of two or more of the abovementioned polymers, wherein the end opposite the end enclosed in the solid particle of at least some fibres protrudes out of the solid particle. The fibres having a maximum length of 1000 ?m and a maximum thickness of 100 ?m. Such fibres can be obtained by mixing the polymer with fibres, by melting the polymer and/or chemical reaction of the polymer components, by cooling the mixture of molten polymer and fibres to give a solid fibre-polymer composite and by comminution of the fibre-polymer composite to give filler particles containing fibres a maximum length of 1000 ?m.

Abstract: Seat valve, with a valve body having a plurality of inlet channels, with a plurality of closing elements arranged movably in a longitudinal direction L, each inlet channel being assigned a closing element for opening and closing the inlet channel, with a closing spring assigned to each closing element. The closing spring applies a prestressing force to the respective closing element to close the inlet channel. Each closing element assigned a braking device which is arranged separately from the closing element and which gradually brakes an opening movement of the closing element when the inlet channel is opened, independently of the closing spring. The braking device having a stop body with a stop surface against which the closing element can be brought to bear after an opening movement when the inlet channel is opened, the stop body being arranged movably and/or yieldingly in the opening direction of the closing element.

Abstract: The poppet valve including a valve body with a plurality of passage channels, a plurality of closing elements, a plurality of guide means, and a catcher. Each passage channel opening into a valve seat. A closing element is mounted on each guide means movable in a stroke direction. A closing element is associated with each valve seat opposite in the stroke direction, so that valve seats can be closed by the closing elements. Guide means are connected to the catcher, each having a guide section with an inner cavity extending in the stroke direction and a support section bearing surface. The spring extends in the inner cavity of the guide section and is clamped between the bearing surface and the closing element. Guide means have a first stop surface towards the valve seat, closing elements have a second stop surface towards the first stop surface to limit closing element travel.

Abstract: The labyrinth piston compressor comprises a cylinder, a piston disposed in the cylinder, and a piston rod, wherein the piston rod extends in a longitudinal direction (L) and is connected to the piston, and wherein the piston is reciprocally movable in the longitudinal direction (L) within the cylinder, wherein the cylinder comprises a first cylinder cover, wherein an inlet valve and an outlet valve are arranged in the first cylinder cover, and wherein the inlet valve and the outlet valve are arranged symmetrically with respect to a plane of symmetry (S) extending in the longitudinal direction (L) along the piston rod.

Abstract: The piston compressor comprises a cylinder as well as a piston arranged therein, a carrier housing with a crosshead mounted in the carrier housing, a spacer which connects the cylinder to the carrier housing, as well as a piston rod extending in a longitudinal direction (L) which connects the crosshead to the piston, wherein the spacer comprises a plurality of support arms, wherein the support arms are connected to and support the cylinder.