EP3857068A1 - Compresseur à piston à labyrinthe - Google Patents

Compresseur à piston à labyrinthe

Info

Publication number
EP3857068A1
EP3857068A1 EP19783448.4A EP19783448A EP3857068A1 EP 3857068 A1 EP3857068 A1 EP 3857068A1 EP 19783448 A EP19783448 A EP 19783448A EP 3857068 A1 EP3857068 A1 EP 3857068A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
cylinder cover
piston compressor
compressor according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19783448.4A
Other languages
German (de)
English (en)
Other versions
EP3857068B1 (fr
Inventor
Alexandre Voser
Reiner Schulz
Sandro BRUNNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Burckhardt Compression AG
Original Assignee
Burckhardt Compression AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Burckhardt Compression AG filed Critical Burckhardt Compression AG
Publication of EP3857068A1 publication Critical patent/EP3857068A1/fr
Application granted granted Critical
Publication of EP3857068B1 publication Critical patent/EP3857068B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • F04B39/045—Labyrinth-sealing between piston and cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0409—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0423—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0451—Particularities relating to the distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/053—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/053—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders
    • F04B27/0536—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders with two or more series radial piston-cylinder units
    • F04B27/0538—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders with two or more series radial piston-cylinder units directly located side-by-side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/18—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use for specific elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122—Cylinder block
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • F04B2015/081—Liquefied gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible

Definitions

  • the invention relates to a labyrinth piston compressor.
  • Liquid natural gas also known as “liquefied natural gas” or “LNG” for short, is natural gas that has cooled to a temperature of at least - 160 ° C, and at these depths
  • Such a piston compressor has the advantage that natural gas can be drawn in and then compressed in a wide temperature range of preferably between - 160 ° C to + 100 ° C.
  • Such a piston compressor is capable, for example an input fluid having a temperature of - 160 ° C to a compressed fluid having a temperature of -40 ° C to
  • a labyrinth piston compressor which is suitable for compressing a fluid that has a high temperature difference between the input fluid and the output fluid.
  • the object of the invention is to design a piston compressor which, despite the high temperature difference between the inlet and outlet, is suitable for compressing a fluid and which is economically advantageous.
  • the task is solved in particular with a
  • a labyrinth piston compressor comprising a cylinder, a piston arranged in the cylinder and a piston rod, the piston rod extending in a longitudinal direction and being connected to the piston, and the piston being movable back and forth within the cylinder in the longitudinal direction, the cylinder having a first cylinder cover comprises, 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 running in the longitudinal direction along the piston rod.
  • a labyrinth piston compressor includes a piston and one
  • Cylinder wherein at least the piston and the cylinder wall of the cylinder is formed a labyrinth seal.
  • the labyrinth seal is a non-contact seal.
  • the sealing effect is based on the extension of the flow path through the gap to be sealed, as a result of which the flow resistance is significantly increased.
  • the path extension is achieved by means of a surface structure of the piston and possibly also of the cylinder wall.
  • the surface of the piston preferably has a plurality of circumferential depressions which are spaced apart from one another in the longitudinal direction of the piston.
  • the labyrinth piston compressor comprising the labyrinth seal has the advantage that the labyrinth seal is made contactless because the piston and the cylinder wall do not touch each other, and therefore no lubrication between the piston and the cylinder wall is required.
  • Such a labyrinth piston compressor allows a so-called oil-free compression of a fluid because there is none for the compression of the fluid
  • Lubricant especially no oil is required.
  • the piston of such a labyrinth piston compressor has no sealing rings, since the labyrinth seal effects a seal.
  • Piston compressor according to the invention is designed in such a way that the temperature differences present do not result in any significant thermal stresses or no significant distortion in components of the piston compressor, or in that the
  • Piston compressor is designed such that an expansion of components caused due to the temperature difference present of the piston compressor takes place in such a way that the individual components are hardly displaced relative to each other due to the temperature difference, which is particularly important for a labyrinth piston compressor since the gap between the outer peripheral surface of the
  • Labyrinth piston and the inner surface of the cylinder facing the outer peripheral surface is particularly small.
  • the labyrinth piston compressor can preferably be operated safely and reliably regardless of the temperature differences present.
  • the piston compressor according to the invention has the advantage that the at least one inlet valve and the at least one outlet valve are arranged in the cylinder cover, which gives the advantage that a fluid to be compressed flows directly into the cylinder interior after flowing through the inlet valve, or that a
  • the piston compressor according to the invention thus preferably has, with the exception of the absolutely necessary
  • the cylinder and / or the piston of the piston compressor advantageously consists of a metal with a thermal conductivity in the
  • Range between 100 and 300 (W / m K), preferably made of aluminum or an aluminum alloy. Has the relatively high thermal conductivity the consequence that a temperature equilibrium is established in the components of the piston compressor during its operation
  • the cylinder and the piston are particularly advantageously made of the same material.
  • the intake valve and the exhaust valve are also in the cylinder
  • a flange or hose which is arranged at the inlet valve or outlet valve and is used for supplying or discharging the fluid, has a small contact area with respect to the cylinder, which in turn reduces heat transfer between the flange or hose and the cylinder.
  • the piston compressor comprises a carrier housing in which
  • the piston compressor according to the invention comprises one
  • the spacer is connected to the cylinder at those areas at which the spacer is connected.
  • the spacer preferably being arranged in such a way that it has a heat distribution that is symmetrical to the plane of symmetry, with the result that there is little or no distortion of the spacer due to the temperatures applied to the spacer.
  • the spacer preferably being arranged in such a way that it has a heat distribution that is symmetrical to the plane of symmetry, with the result that there is little or no distortion of the spacer due to the temperatures applied to the spacer.
  • the cylinder and / or the piston consists of aluminum or an aluminum alloy, a very good heat-conducting metal.
  • the very good heat conduction has the advantage that during the continuous operation of the
  • Piston compressor very quickly sets an average temperature or an average operating temperature of the individual components of the compressor, and thereby temperature peaks can be avoided.
  • the piston compressor according to the invention has the advantage that, in a preferred embodiment, it requires relatively few parts and that the movable parts can be selected to be relatively low in mass.
  • Piston compressor can be operated at a high speed of, for example, up to 1800 revolutions per minute.
  • Fig. 1 shows a longitudinal section through a piston compressor along the
  • FIG. 2 shows a detailed view of the piston compressor according to FIG. 1,
  • FIG. 3 shows a detailed view of the arrangement of the valve in the cylinder
  • FIG. 5 shows a further side view of the cylinder with a spacer
  • Fig. 6 shows a longitudinal section through the cylinder with pistons along the
  • Fig. 9 the piston compressor in an insert configuration.
  • the piston compressor 1 comprises a piston rod 24, which connects the cross head 63 to the piston 20 and drives the piston 20.
  • the piston compressor 1 has a longitudinal axis L which extends in the center of the piston rod 24 along the piston rod 24.
  • the cylinder 10 comprises a first cylinder cover 11, a second cylinder cover 12 and one arranged in between
  • the first cylinder cover 11 comprises one
  • Exhaust valve receiving opening 11b in which an intake valve 90 and an exhaust valve 91 are arranged.
  • one flange 14 is connected to the opening 1 1a, 1 1b, the flange 14 serving for supplying or discharging a fluid between outside the cylinder 10 and an interior 10a of the cylinder 10. Fluids can be
  • the second cylinder cover 12 likewise comprises an inlet valve receiving opening 12a and an outlet valve receiving opening 12b with an inlet valve 90 and an outlet valve 91 arranged therein.
  • the second cylinder cover 12 has a central section 12h having a passage opening 12g, in which the piston rod 24 is arranged to be movable in its direction L.
  • the cylinder 10 or the piston 20 is designed to be double-acting, in which the piston 20 delimits a first cylinder interior 10a and a second cylinder interior 10b.
  • the piston 20 delimits a first cylinder interior 10a and a second cylinder interior 10b.
  • Embodiment could be dispensed with the cylinder jacket 13 in that the first and second cylinder covers 11, 12 are made longer in the longitudinal direction L.
  • a first, a second and a third stuffing box chamber 50, 51.52 are arranged downstream of the central section 12h.
  • the spacer 40 has a spacer interior 40a, in which an oil wiping pack 55, only shown schematically comprising preferably a guide is arranged which the
  • Piston rod 24 encloses.
  • an oil screen 54 is arranged on the piston rod 24.
  • the carrier housing 60 has a bore 60a, which forms a sliding surface for the cross head 63, so that the cross head 63, the piston rod 24 connected to the cross head 63 and the piston 20 connected to the piston rod 24 in
  • Longitudinal direction L can move back and forth.
  • the sliding surface for the crosshead is preferably lubricated, preferably with oil, this lubrication not being shown in detail.
  • the cylinder 10 and / or the piston 20, and preferably also the carrier housing 60 and the crosshead 63, consist of a metal with a thermal conductivity in the range of preferably between 100 and 300 (W / m ⁇ K), preferably of aluminum or one
  • Cross head 63 made of the same material, so that they have the same properties with regard to thermal expansion.
  • FIG. 2 shows a detailed view of the piston compressor 1 according to FIG. 1, essentially the cylinder 10, the piston 20, the flanges 14 and the inlet and outlet valves 90, 91.
  • the cylinder 10 and the piston 20 are designed to be single-acting , for example, an inlet valve 90 and an outlet valve 91 are arranged only in the first cylinder cover 11.
  • the cylinder 10 and the piston 20 are particularly advantageously configured to be double-acting, with a first cylinder interior 10a, a second cylinder interior 10b and two inlet valves 90 and two
  • Exhaust valves 91 Exhaust valves 91.
  • an intake valve 90 and an exhaust valve 91 are thus arranged at least in the first cylinder cover 11 or in the second cylinder cover 12, and preferably, as shown in FIG. 2, an intake valve 90 and two in each of the two cylinder covers 11, 12 an outlet valve 91 is arranged.
  • the inlet valve 90 and the outlet valve 91 are preferably symmetrical with respect to one in the longitudinal direction L along the piston rod 24
  • both intake valves 90 and both exhaust valves 91 are arranged on the same side of cylinder 10 as shown in FIG. 2, that is, as shown in FIG. 2, both on the left and both on the right of the
  • the piston compressor according to the invention is particularly suitable for compressing a fluid via the inlet valve 90
  • inflowing inlet fluid FE and its outlet fluid FA flowing out via outlet valve 91 have a high temperature difference of, for example, between 100 ° C. to 150 ° C. So can
  • the inlet fluid FE for example exhaust gas from liquid natural gas
  • the outlet fluid FA have a temperature of ⁇ 40 ° C.
  • the symmetrical arrangement of inlet valve 90 and outlet valve 91 with respect to the plane of symmetry S has the advantage that the cylinder 10 and the piston 20 assume an average temperature during operation in the region of the plane of symmetry S or the longitudinal axis L running along the piston rod 24, wherein the temperature of the cylinder 10 and the piston 20 perpendicular to the longitudinal axis L usually decreases towards the inlet valve 90 and increases towards the outlet valve 91.
  • the cylinder 10 preferably has only a small number
  • the cylinder 10 and the piston 20 have an average temperature in the region of the longitudinal axis L during operation, the cylinder 10, the piston 20 and the piston rod 24 experience no or negligible distortion caused by temperature differences present in these parts or by Caused temperature differences Changes in length.
  • the cylinder 10 and / or the piston 20 are made of a highly thermally conductive material, for example aluminum, which gives the advantage that the temperature differences present during operation on the cylinder 10 and on the piston 20 are reduced.
  • the piston compressor according to the invention is advantageously operated at ambient temperature. If exhaust gas from liquid natural gas is compressed with the piston compressor according to the invention, the outer surface of the cylinder 10 is exposed to air
  • a gas space is understood to mean the space between a fluid supply line 15 and the input valve 90 or the space between the output valve 91 and a fluid discharge line 16.
  • the piston compressor 1 according to the invention has
  • Fluid supply line 15 or a flange 14 is arranged, via which the fluid is supplied to the cylinder 10 from the outside, or in that a fluid discharge line 16 or a flange 14 is arranged in the fluid flow direction F immediately after the outlet valve 91, via which the fluid from the Cylinder 10 is discharged to the outside.
  • the delivered fluid is no longer in direct heat-conducting contact with the cylinder 10 until immediately before the inlet valve 90 or immediately after the outlet valve 91. This has the consequence that the cylinder 10 is cooled to a lesser depth.
  • at least one of the components inlet valve 90, outlet valve 91 and flange 14 are designed such that they have an increased thermal conductivity
  • FIG. 3 shows a detailed view of an embodiment to increase the thermal resistance.
  • the exhaust valve 91 does not lie over the entire surface but only over part of the surface 91a on the first cylinder cover 11, which is the
  • Cylinder cover 1 1 increased. In the same way, that could also be
  • Inlet valve 90 may be arranged in the first or second cylinder cover 11, 12.
  • a further possibility for increasing the thermal resistance is, as shown in FIG. 3, that the flange 14 does not rest over the entire surface but only over the partial areas 14a on the first cylinder cover 11, which increases the thermal resistance between the flange 14 and the first cylinder cover 11.
  • the flange 14 could also be arranged in the second cylinder cover 12.
  • the piston compressor 1 according to the invention is advantageously operated at ambient temperature, so that the cylinder 10 is heated by the ambient air while conveying and compressing, for example, exhaust gas, the above-described increase in thermal conductivity giving the advantage that the cylinder 10 is reduced due to the flowing fluid F Mass is cooled so that the cylinder 10 has a higher during operation
  • Has temperature distribution for example, the risk of
  • the inside of the first or second cylinder cover 11, 12 and the outer surface of the first or second piston cover 21, 22 are mutually adapted such that the so-called damage chamber remains as small as possible.
  • first cylinder cover 11 and / or the second cylinder cover 12 could have an end surface running perpendicular to the longitudinal axis L, in which the inlet valve 90 and the outlet valve 91 are arranged.
  • first cylinder cover 11 and / or the second cylinder cover 12 are particularly advantageously configured, as shown in FIG. 2, such that the inlet valve 90 and the
  • Exhaust valve 91 are arranged inclined in the cylinder cover 11, 12 with respect to the plane of symmetry S. This enables valves 90, 91 with a larger diameter to be used, which reduces their flow resistance.
  • Figures 4 and 5 show the same cylinder 10 as in Figure 2, but not in one section but in two different side views.
  • the cylinder 10 comprises the first cylinder cover 11, the cylinder jacket 13 and the second cylinder cover 12.
  • the flanges 14 are arranged in the cylinder covers 11, 12 .
  • the cylinder 10 is over a
  • Spacer 40 firmly connected to the carrier housing 60 and
  • spacer 40 comprises two support arms 42, 43 arranged symmetrically with respect to the plane of symmetry S
  • the second cylinder cover 12 comprises two fastening points 12e, 12f, which are each firmly connected to a support arm 42, 43.
  • Each of the two fastening points 12e, 12f is preferably configured identically in the circumferential direction and, as shown in FIG.
  • FIG. 4 shows the course of the section line B-B and the course of the plane of symmetry S.
  • FIG. 5 also shows the course of the section line A-A and the course of the second plane of symmetry S2.
  • the attachment points 12e, 12f preferably run, as shown in FIG. 4 with the attachment point 12f, essentially perpendicular to the plane of symmetry S and are symmetrical to the
  • the attachment point 12f preferably runs symmetrically with respect to the point S 3 or symmetrically with respect to the plane of symmetry S.
  • the cylinder 10 points during operation of the piston compressor 1 in the area of the plane of symmetry S or in the area of the Point S 3 has an average temperature, the same temperature being present at both fastening points 12e, 12f due to the symmetrical arrangement, or the cylinder 10 having the same temperature, so that the first support arm 42 and the second support arm 43 at the two fastening points 12e, 12f the same
  • Symmetrically designed support arms 42, 43 of the spacer 40 result in the advantage that the support arms 42, 43 on the two Fastening points 12e, 12f have the same temperature, so that there is no mutual thermal distortion on the two support arms 42, 43.
  • the input fluid FE and the output fluid FA can have a considerable temperature difference, so that the corresponding flanges 14 and also the cylinder 10 and possibly the piston 20 in the direction of travel C one
  • Spacer 40 is held in a defined position during the operation of the piston compressor 1. It is particularly important that the piston rod 24 also passes through the passage opening 12g of the second valve cover 12 in the region of the plane of symmetry S, a region of the valve cover 12 which also has an average temperature, so that there is no or only one between the passage opening 12g and the piston rod 24 very little thermal distortion should occur.
  • the spacer 40 is U-shaped, comprising a first support arm 42 and a second support arm 43.
  • the spacer 40 could also have more support arms, for example four, six or eight, which are connected to the second cylinder cover 12
  • Figure 6 essentially shows the cylinder 10 and the piston 20 without the flanges 14 in a section along the section line A-A.
  • FIG. 7 essentially shows the cylinder 10 and the piston 20 without the
  • the cylinder 10 comprises at least three parts, the first cylinder cover 11, the second cylinder cover 12 and a preferably tubular cylinder jacket 13, the cylinder jacket 13 being arranged between the first cylinder cover 11 and the second cylinder cover 13.
  • the piston 20 comprises at least three parts, a first piston cover 21, a second piston cover 22 and a piston jacket 23 arranged between the first and second piston covers 21, 22.
  • This layer structure of the cylinder and / or piston enables particularly favorable maintenance because only for maintenance purposes replace those parts that could show considerable wear, for example the cylinder jacket 13 and the piston jacket 23.
  • the piston skirt 23 at least partially has a labyrinth-shaped outer surface 23a, so that the piston compressor 1 is designed as a labyrinth piston compressor.
  • the piston compressor 1 is designed as a labyrinth piston compressor.
  • At least one sealing ring is arranged on the piston jacket 23, the piston jacket 23 preferably having at least one circumferential groove in which the sealing ring is arranged, so that the piston compressor 1 is designed as a ring-sealed piston compressor 1.
  • the second cylinder cover 12 has, preferably arranged on its outer edge 12i, fastening points 12e, 12f at which the
  • Support arms 42, 43 are fastened via a fastening means, not shown, preferably a screw.
  • the fastening points 12e, 12f are preferably arranged mutually symmetrically to the plane of symmetry S.
  • At least one of the two piston covers 21, 22 points toward the associated cylinder cover 11, 12 protruding, in particular convex, piston end face 21a, 22a, the associated cylinder cover 11, 12 having a correspondingly protruding cylinder cover outer side 11c, 12c or a cylinder cover inner side 11d, 12d correspondingly receding with respect to piston end surface 21a, 22a, as is the case, for example, in FIG. 2 is shown.
  • the second cylinder cover 12 has an in in the center
  • Passage opening 12g running in the longitudinal direction L, along which the piston rod 24 extends, preferably at least one stuffing box chamber 50 and preferably a plurality of stuffing box chambers being arranged in the longitudinal direction L following the passage opening 12g, outside the cylinder cover 12.
  • At least one of inlet valve 90, outlet valve 91 and flange 14 does not lie on the first or second with the entire possible area
  • Figure 8 shows the piston compressor 1 in a side view. This comprises two cylinders 10 with pistons 20 arranged therein, each piston 20 being connected to the carrier housing 60 via a spacer 40, and each piston rod 24 being driven by a common crankshaft 61. Below the carrier housing 60, an oil drip pan 64 is arranged. In another advantageous
  • the piston compressor 1 can also have only a single cylinder 10 with pistons 20, or a plurality of cylinders 10 with a corresponding piston 20, for example between three to ten cylinders 10.
  • FIG. 9 shows a compressor unit 80 comprising one
  • Piston compressor 1 an electric motor 81, a feed manifold 85, which is connected to the fluid supply line 15, and one
  • Discharge manifold 86 which is connected to the fluid discharge line 16.
  • the fluid supply line 15 and the fluid discharge line 16 are preferably configured to be elastic in order to prevent temperature-related expansions
  • these lines 15, 16 consisting for example of a metal braid.
  • the piston compressor 1 comprises a cylinder 10 and a piston 20 arranged therein
  • Carrier housing 60 connects, and one in a longitudinal direction L
  • the spacer 40 comprising a plurality of support arms 42, 43, the support arms 42, 43 being connected to and supporting the cylinder 10.
  • the cylinder 10 advantageously comprises a plurality of fastening points 12e, 12f arranged symmetrically with respect to the longitudinal axis L, to which the support arms 42, 43 are fastened.
  • the piston compressor has a plane of symmetry S running in the longitudinal direction L along the piston rod 24, the fastening points 12e, 12f and the support arms 42, 43 being arranged symmetrically with respect to the plane of symmetry S.
  • the spacer 40 is U-shaped, with two support arms 42, 43 running in the longitudinal direction L, the cylinder 10 being two
  • Each fastening point 12e, 12f advantageously has a width C in the circumferential direction of the cylinder 10 in the range between 10 ° and has 30 °.
  • the cylinder 10 advantageously includes a
  • Inlet valve 90 and an outlet valve 91 wherein the inlet valve 90 and the outlet valve 91 are mutually symmetrical with respect to the
  • the cylinder 10 advantageously comprises a first cylinder cover 11 and a second one
  • Cylinder cover 11, 12 includes an inlet valve 90 and an outlet valve 91, so that the cylinder 10 and the piston 20 are designed to be double-acting.
  • a plurality of cylinders 10 with pistons 20 arranged therein are advantageously spaced apart from one another
  • Carrier housing 60 are arranged and each have a separate
  • Spacers 40 are connected to the carrier housing 60.
  • a piston rod 24 is advantageously assigned to each piston 20, the carrier housing 60 being designed as a monoblock, and the monoblock having a number of bores corresponding to the number of piston rods 45, in which a crosshead 63 is slidably mounted, each piston 20 having one Piston rod 20 with the
  • the monoblock and the crosshead 62 are advantageously made of a metal with a
  • the cylinder 10 and / or the piston 20 preferably consists of a metal with a thermal conductivity in the range between 100 and 300 (W / m ⁇ K), preferably of aluminum or one
  • the piston compressor 1 comprising a cylinder 10 and a piston 20 arranged therein, a carrier housing 60 with a
  • Carrier housing 60 mounted crosshead 63, a spacer 40, which connects the cylinder 10 to the carrier housing 60, and a piston rod 24 extending in a longitudinal direction L, which the
  • Cross head 63 connects to the piston 20, is advantageously such operated that heat energy, due to a heat difference present between the cylinder 10 and the carrier housing 60, is exchanged via a plurality of support arms 42, 43.
  • An inlet fluid FE is advantageously supplied to the cylinder 10 via an inlet valve 90
  • Piston rod 24 extending plane of symmetry S are arranged so that the cylinder 10 during the delivery of the fluid in the region of the
  • the plane of symmetry S is heated to an average temperature which lies between the temperature of the inlet fluid FE and the outlet fluid FA, the support arms 42, 43 being connected to the cylinder 10 in the region of the plane of symmetry S via fastening points 12e, 12f.
  • the piston rod 45 advantageously runs in the region of the plane of symmetry S, and this is tempered to substantially the same temperature as the attachment points 12e, 12f while the fluid is being conveyed.
  • the piston compressor 1 shown in FIG. 1 comprises a cylinder 10 and a piston 20 arranged therein, a carrier housing 60 with a cross head 63 mounted in the carrier housing 60, a spacer 40 which connects the cylinder 10 to the carrier housing 60, and one in a longitudinal direction L. extending piston rod 24, which connects the crosshead 63 to the piston 20, the spacer 40 comprising a plurality of longitudinally extending support arms 42, 43, the support arms 42, 43 being individually connected to the cylinder 10 toward the cylinder 10.
  • the cylinder 10 has a plurality of fastening points 12e, 12f, one supporting arm 42, 43 being fastened to one fastening point 12e, 12f.
  • the attachment points 12e, 12f are mutually symmetrical with respect to the longitudinal direction L.
  • the compressor according to the invention can also have at least one piston as a labyrinth piston compressor or as a compressor
  • the method for operating a piston compressor 1 comprises a cylinder 10 and a piston 20 arranged therein, a carrier housing 60 with a crosshead 63 mounted in the carrier housing 60, one
  • Spacer 40 which connects the cylinder 10 to the carrier housing 60, and a piston rod 24 running in a longitudinal direction L, which connects the crosshead 63 to the piston 20, the spacer 40 comprising a plurality of support arms 42, 43 running in the longitudinal direction L, the support arms 42, 43 towards the cylinder 10 each individually via fastening points 12e, 12f with the cylinder 10
  • the inlet fluid FE is preferably supplied with a
  • the attachment points 12e, 12f each have a center point S3 in the region of the plane of symmetry S, which during the Conveying the fluid can be tempered to substantially the same temperature.
  • the spacer 40 is U-shaped, with a support section 41 and two support arms 42, 43 running in the longitudinal direction L, with the support arms 42, 43 and
  • Support section 41 thermal energy is exchanged between the cylinder 10 and the carrier housing 60.
  • the circumferential direction of the cylinder 10 has a width C in the range between 10 ° and 30 °, each fastening point 12e, 12f being arranged symmetrically to the center point S3, so that heat energy is transmitted in the circumferential direction from the respective support arm 42, 43 along the fastening point 12e, 12f.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne un compresseur à piston à labyrinthe (1) comprenant un cylindre (10), un piston (20) monté dans le cylindre (10) ainsi qu'une tige de piston (24), la tige de piston (24) s'étendant dans une direction longitudinale (L) et étant reliée au piston (20), et le piston (20) effectuant un mouvement de va-et-vient dans la direction longitudinale (L) à l'intérieur du cylindre (10), ledit cylindre (10) comprenant un premier couvercle de cylindre (11), une soupape d'admission (90) et une soupape d'échappement (91) étant montées dans le premier couvercle de cylindre (11), et la soupape d'admission (90) et la soupape d'échappement (91) étant montées de manière symétrique par rapport à un plan de symétrie s'étendant dans la direction longitudinale (L) le long de la tige de piston (24).
EP19783448.4A 2018-09-24 2019-09-24 Compresseur à piston labyrinthe Active EP3857068B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18196407 2018-09-24
PCT/EP2019/075774 WO2020064781A1 (fr) 2018-09-24 2019-09-24 Compresseur à piston à labyrinthe

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Publication Number Publication Date
EP3857068A1 true EP3857068A1 (fr) 2021-08-04
EP3857068B1 EP3857068B1 (fr) 2024-05-22

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EP19783448.4A Active EP3857068B1 (fr) 2018-09-24 2019-09-24 Compresseur à piston labyrinthe

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US (1) US20210404454A1 (fr)
EP (1) EP3857068B1 (fr)
JP (1) JP2022502596A (fr)
KR (1) KR20210063407A (fr)
CN (1) CN113302398A (fr)
WO (1) WO2020064781A1 (fr)

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Also Published As

Publication number Publication date
EP3857068B1 (fr) 2024-05-22
WO2020064781A1 (fr) 2020-04-02
CN113302398A (zh) 2021-08-24
JP2022502596A (ja) 2022-01-11
US20210404454A1 (en) 2021-12-30
KR20210063407A (ko) 2021-06-01

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