EP1915530A1 - Cryogenic compressor comprising a high-pressure phase separator - Google Patents

Cryogenic compressor comprising a high-pressure phase separator

Info

Publication number
EP1915530A1
EP1915530A1 EP06754048A EP06754048A EP1915530A1 EP 1915530 A1 EP1915530 A1 EP 1915530A1 EP 06754048 A EP06754048 A EP 06754048A EP 06754048 A EP06754048 A EP 06754048A EP 1915530 A1 EP1915530 A1 EP 1915530A1
Authority
EP
European Patent Office
Prior art keywords
compressor
piston
cylinder wall
chamber
opening
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
EP06754048A
Other languages
German (de)
French (fr)
Other versions
EP1915530B1 (en
Inventor
Robert Adler
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.)
Linde GmbH
Original Assignee
Linde GmbH
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Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Publication of EP1915530A1 publication Critical patent/EP1915530A1/en
Application granted granted Critical
Publication of EP1915530B1 publication Critical patent/EP1915530B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B23/00—Pumping installations or systems
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in the reservoir
    • F04B23/023—Pumping installations or systems having reservoirs the pump being immersed in the reservoir only the pump-part being immersed, the driving-part being outside the reservoir
    • 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
    • F04B37/20—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 for wet gases, e.g. wet air

Definitions

  • the invention relates to a compressor, in particular a compressor for cryogenic media, preferably for liquid hydrogen, comprising a compressor chamber surrounded by a cylinder wall, in which a compressor piston is moved linearly, a suction and a pressure valve, which are arranged in the region of the lower end position of the compressor piston are, and a liquid space at least partially surrounding the compressor space.
  • cryogenic media is to be understood below to mean so-called cryogenic liquids, in particular liquid hydrogen, liquefied natural gas, liquid nitrogen, liquid oxygen and other liquefied gases.
  • Compressors of all kinds are well known from the prior art. What they all have in common is that the medium to be compressed is fed into a compression chamber via a spring-loaded suction valve, compressed and then withdrawn from the compression chamber via a pressure valve.
  • the spring force of the spring used for closing a suction valve - in this case r is are preferably coil springs - is that a defined closure of the suction valve is achieved, so the suction valve is pressed into its valve seat and is closed thereby so chosen as a rule.
  • the object of the present invention is to provide a generic compressor, in particular a generic compressor for cryogenic media, in which the aforementioned disadvantages can be avoided.
  • a generic compressor which is characterized in that the cylinder wall has at least one opening, which corresponds to the liquid space, and at least one opening, through which gaseous medium can be discharged from the compressor space, with the openings at Locations of the cylinder wall are arranged, which are run over by the compressor piston.
  • the openings are designed in the form of one and / or more slots
  • the opening (s) through which gaseous medium can be discharged from the compressor chamber is or are operatively connected to a gas discharge line
  • the openings are arranged at locations on the cylinder wall which are only released by the compressor piston when it has arrived directly before its upper end position or in its upper end position.
  • the suction valve has at least one recess on its surface facing the compressor piston, the recess being designed in such a way that a vacuum is created between the suction valve and the compressor piston.
  • a compressor chamber R surrounded by a cylinder wall 1 is provided within a compressor housing V: in this a compressor piston K is moved linearly back and forth or up and down.
  • the two reversal points of the compressor piston K are referred to below as the lower and upper end positions of the compressor piston K.
  • a suction valve S which is loaded by a spring 5 and a spring-loaded pressure valve D which is only shown schematically. Both valves are pressed into their valve seats by means of the forces generated by the springs and thereby closed.
  • the compressor chamber R or the cylinder wall 1 are at least partially surrounded by a liquid chamber F, which is formed by the liquid medium to be compressed.
  • a gas volume or space G is formed above this liquid space F.
  • openings 2 and 3 are now provided.
  • one of the openings 2 corresponds to the liquid space, while gaseous medium can be discharged from the compressor space R via the other opening 3.
  • this gaseous medium is discharged from the compressor chamber R via a gas discharge line 4.
  • the gas produced by the suction process via the opening 2 can now be the Leave the compressor chamber R via the opening 3 and be replaced by the flowing liquid medium. This leads to an increase in the delivery rate and a reduction in the specific compression work.
  • the gas compressed by means of the piston K leaves the compression chamber R when the pressure valve D is open via the gas discharge line 6 and is then fed to a consumer via a high-pressure line.
  • the two openings 2 and 3 are preferably in the form of one and / or more slots.
  • the openings 2 and 3 are preferably arranged at locations on the cylinder wall 1 which are or will only be run over by the compressor piston K when it has reached the top end position or end position.
  • the compressor piston K is shown in its upper end position.
  • the two openings 2 and 3 are now released, so that liquid medium to be compressed can flow from the liquid space F into the compressor space R via the opening 2 (represented by the arrows drawn in parallel).
  • This inflowing liquid medium supplements the quantity of liquid F 'already in the compressor chamber R, which results from the liquid medium flowing in via the suction valve S during the suction tract.
  • the gaseous medium G ′ formed during the suction cycle can escape from the compressor chamber R via the opening 3 or the gas discharge line 4. This escape of the gaseous medium is supported by the liquid medium flowing in via the opening 2, since the gaseous medium G ′ located in the compression space R is displaced from the compression space R by the inflowing liquid medium.
  • Compressor piston K facing surface has at least one recess; this is designed such that a vacuum is created between the suction valve S and the compressor piston K.
  • the shape of the depression (s) to be provided on the surface of the suction valve S facing the compressor piston K can in principle be chosen as desired; the only thing that ultimately matters is that a vacuum is formed between suction valve S and compressor piston K. It is also possible to provide only one or more wells.
  • Compressor space increases, which results in a higher delivery rate of the compressor according to the invention.
  • a reduction in the specific compressor capacity based on the amount of the pumped or compressed medium can thus be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

An apparatus and method for compressing a cryogenic media is disclosed. A compressor includes a compressor chamber surrounded by a cylinder wall in which a compressor piston is moved in a linear manner, a suction valve and a pressure valve, which are arranged in the region of the lower end position of the compressor piston, and a liquid chamber which at least partially surrounds the compressor chamber. The cylinder wall defines at least one opening, which corresponds to the liquid chamber, and at least one opening, via which the gaseous medium can be extracted from the compressor chamber, where the openings are located at points on the cylinder wall that are passed by the compressor piston.

Description

Beschreibung description
Kryoverdichter mit HochdruckphasentrennerCryogenic compressor with high pressure phase separator
Die Erfindung betrifft einen Verdichter, insbesondere einen Verdichter für kryogene Medien, vorzugsweise für flüssigen Wasserstoff, aufweisend einen von einer Zylinderwand umgebenen Verdichterraum, in dem ein Verdichterkolben linear bewegt wird, ein Saug- und ein Druckventil, die im Bereich der unteren Endlage des Verdichterkolbens angeordnet sind, und einen den Verdichterraum zumindest teilweise umgebenden Flüssigkeitsraum.The invention relates to a compressor, in particular a compressor for cryogenic media, preferably for liquid hydrogen, comprising a compressor chamber surrounded by a cylinder wall, in which a compressor piston is moved linearly, a suction and a pressure valve, which are arranged in the region of the lower end position of the compressor piston are, and a liquid space at least partially surrounding the compressor space.
Unter dem Begriff "kryogene Medien" seien nachfolgend sog. tiefkalte Flüssigkeiten, insbesondere flüssiger Wasserstoff, verflüssigtes Erdgas, flüssiger Stickstoff, flüssiger Sauerstoff und andere verflüssigte Gase zu verstehen.The term “cryogenic media” is to be understood below to mean so-called cryogenic liquids, in particular liquid hydrogen, liquefied natural gas, liquid nitrogen, liquid oxygen and other liquefied gases.
Verdichter jeglicher Art sind aus dem Stand der Technik hinlänglich bekannt. Ihnen allen ist gemein, dass über ein federbelastetes Saugventil das zu verdichtende Medium in einen Verdichterraum geführt, verdichtet und anschließend über ein Druckventil aus dem Verdichterraum abgezogen wird.Compressors of all kinds are well known from the prior art. What they all have in common is that the medium to be compressed is fed into a compression chamber via a spring-loaded suction valve, compressed and then withdrawn from the compression chamber via a pressure valve.
Die Federkraft der für das Schließen eines Saugventiles verwendeten Feder - hierbei r handelt es sich vorzugsweise um Schraubenfedern - wird im Regelfall so gewählt, dass ein definiertes Schließen des Saugventiles erreicht wird, das Saugventil also in seinen Ventilsitz gedrückt und dadurch verschlossen wird.The spring force of the spring used for closing a suction valve - in this case r is are preferably coil springs - is that a defined closure of the suction valve is achieved, so the suction valve is pressed into its valve seat and is closed thereby so chosen as a rule.
Während des Saugtaktes des Verdichters - dabei wird der Verdichterkolben von der unteren in die obere Endlage bewegt - müssen die Federkraft und in Abhängigkeit von der Anordnung des Saugventiles (zumindest teilweise) dessen Gewichtskraft durch das in den Verdichterraum einströmende Medium überwunden werden.During the suction stroke of the compressor - the compressor piston is moved from the lower to the upper end position - the spring force and depending on the arrangement of the suction valve (at least partially) its weight must be overcome by the medium flowing into the compressor chamber.
Insbesondere dann, wenn mittels des Verdichters ein kryogenes Medium, wie beispielsweise flüssiger Wasserstoff, angesaugt wird, kommt es aufgrund der bisher verwendeten Saugventilkonstruktionen zu nicht unerheblichen Verlusten bzgl. der Förderleistung, da das über das Saugventil in den Verdichterraum eintretende Medium beim Überwinden der vorbeschriebenen Kräfte des Saugventiles zumindest teilweise verdampft.In particular, if a cryogenic medium, such as liquid hydrogen, is sucked in by means of the compressor, the suction valve designs used to date lead to considerable losses in terms of the delivery capacity, since the medium entering the compressor chamber via the suction valve evaporates at least partially when overcoming the above-described forces of the suction valve.
Dies hat zur Folge, dass sich der Flüssiganteil des zu verdichtenden Mediums verringert, woraus eine Verringerung der Förderleistung und eine Erhöhung der spezifischen Verdichterleistung resultieren.This has the consequence that the liquid portion of the medium to be compressed is reduced, which results in a reduction in the delivery capacity and an increase in the specific compressor capacity.
Aufgabe der vorliegenden Erfindung ist es, einen gattungsgemäßen Verdichter, insbesondere einen gattungsgemäßen Verdichter für kryogene Medien, anzugeben, bei dem die vorgenannten Nachteile vermieden werden können.The object of the present invention is to provide a generic compressor, in particular a generic compressor for cryogenic media, in which the aforementioned disadvantages can be avoided.
Zur Lösung dieser Aufgabe wird ein gattungsgemäßer Verdichter vorgeschlagen, der dadurch gekennzeichnet ist, dass die Zylinderwand wenigstens eine Öffnung, die mit dem Flüssigkeitsraum korrespondiert, und wenigstens eine Öffnung, über die gasförmiges Medium aus dem Verdichterraum abgeführt werden kann, aufweist, wobei die Öffnungen an Stellen der Zylinderwand angeordnet sind, die von dem Verdichterkolben überfahren werden.To solve this problem, a generic compressor is proposed, which is characterized in that the cylinder wall has at least one opening, which corresponds to the liquid space, and at least one opening, through which gaseous medium can be discharged from the compressor space, with the openings at Locations of the cylinder wall are arranged, which are run over by the compressor piston.
Weitere vorteilhafte Ausgestaltungen des erfindungsgemäßen Verdichters sind dadurch gekennzeichnet, dassFurther advantageous embodiments of the compressor according to the invention are characterized in that
die Ausbildung der Öffnungen in Form eines und/oder mehrerer Schlitze erfolgt,the openings are designed in the form of one and / or more slots,
die Öffnung(en), über die gasförmiges Medium aus dem Verdichterraum abgeführt werden kann, mit einer Gasabführleitung in Wirkverbindung steht bzw. stehen,the opening (s) through which gaseous medium can be discharged from the compressor chamber is or are operatively connected to a gas discharge line,
die Öffnungen an Stellen der Zylinderwand angeordnet sind, die erst dann von dem Verdichterkolben freigegeben werden, wenn dieser unmittelbar vor seiner oberen Endlage oder in seiner oberen Endlage angelangt ist.the openings are arranged at locations on the cylinder wall which are only released by the compressor piston when it has arrived directly before its upper end position or in its upper end position.
das Saugventil auf seiner dem Verdichterkolben zugewandten Fläche wenigstens eine Vertiefung aufweist, wobei die Vertiefung derart ausgebildet ist, dass zwischen dem Saugventil und dem Verdichterkolben ein Unterdruck entsteht. Der erfindungsgemäße Verdichter mit Hochdruckphaseπtrenner sowie weitere Ausgestaltungen desselben, die Gegenstände der abhängigen Patentansprüche darstellen, seien anhand des in der Figur dargestellten Ausführungsbeispieles näher erläutert. Die Figur zeigt eine seitliche schematisierte Schnittdarstellung durch eine mögliche Ausführungsform des erfindungsgemäßen Verdichters mit Hochdruckphasentrenner.the suction valve has at least one recess on its surface facing the compressor piston, the recess being designed in such a way that a vacuum is created between the suction valve and the compressor piston. The compressor according to the invention with a high-pressure phase separator and further refinements of the same, which are the subject of the dependent claims, are explained in more detail with reference to the exemplary embodiment shown in the figure. The figure shows a schematic side sectional view through a possible embodiment of the compressor according to the invention with high-pressure phase separator.
Innerhalb eines Verdichtergehäuses V ist ein von einer Zylinderwand 1 umgebener Verdichterraum R vorgesehen: In diesem wird ein Verdichterkolben K linear hin und her bzw. auf und ab bewegt. Die beiden Umkehrpunkte des Verdichterkolbens K werden nachfolgend als untere und obere Endlage des Verdichterkolbens K bezeichnet.A compressor chamber R surrounded by a cylinder wall 1 is provided within a compressor housing V: in this a compressor piston K is moved linearly back and forth or up and down. The two reversal points of the compressor piston K are referred to below as the lower and upper end positions of the compressor piston K.
Am Boden des Verdichterraumes R ist ein mittels einer Feder 5 belastetes Saugventil S und ein - lediglich schematisch dargestelltes - federbelastetes Druckventil D angeordnet. Beide Ventile werden über die mittels der Federn erzeugten Kräfte in ihre Ventilsitze gedrückt und dadurch geschlossen. Der Verdichterraum R bzw. die Zylinderwand 1 sind zumindest teilweise von einem Flüssigkeitsraum F, der durch das zu verdichtende, flüssige Medium gebildet wird, umgeben. Oberhalb dieses Flüssigkeitsraumes F ist ein Gasvolumen bzw. -räum G ausgebildet.At the bottom of the compressor chamber R there is a suction valve S which is loaded by a spring 5 and a spring-loaded pressure valve D which is only shown schematically. Both valves are pressed into their valve seats by means of the forces generated by the springs and thereby closed. The compressor chamber R or the cylinder wall 1 are at least partially surrounded by a liquid chamber F, which is formed by the liquid medium to be compressed. A gas volume or space G is formed above this liquid space F.
Zum Stand der Technik zählende Verdichterkonstruktionen weisen die in der Figur dargestellten Öffnungen 2 und 3 nicht auf. Während des Saugtaktes - dabei bewegt sich der Verdichterkolben K aus der unteren in die obere Endlage - strömt über das Saugventil S flüssiges Medium aus dem Flüssigkeitsraum F in den Verdichterraum R, wobei das flüssige Medium - wie eingangs erläutert - zumindest teilweise verdampft.Compressor designs belonging to the prior art do not have the openings 2 and 3 shown in the figure. During the suction cycle - the compressor piston K moves from the lower to the upper end position - liquid medium flows from the liquid chamber F into the compressor chamber R via the suction valve S, the liquid medium - as explained at the beginning - at least partially evaporating.
Erfindungsgemäß sind nunmehr wenigstens zwei Öffnungen 2 und 3 vorgesehen. Hierbei korrespondiert eine der Öffnungen 2 mit dem Flüssigkeitsraum, während über die andere Öffnung 3 gasförmiges Medium aus dem Verdichterraum R abgeführt werden kann. Bei dem in der Figur dargestellten Ausführungsbeispiel des erfindungsgemäßen Verdichters erfolgt dieses Abführen des gasförmigen Mediums aus dem Verdichterraum R über eine Gasabführleitung 4. Das durch den Ansaugvorgang über die Öffnung 2 entstandene Gas kann nunmehr den Verdichterraum R über die Öffnung 3 verlassen und durch nachströmendes, flüssiges Medium ersetzt werden. Dies führt zu einer Steigerung der Förderleistung und einer Senkung der spezifischen Verdichtungsarbeit.According to the invention, at least two openings 2 and 3 are now provided. Here, one of the openings 2 corresponds to the liquid space, while gaseous medium can be discharged from the compressor space R via the other opening 3. In the embodiment of the compressor according to the invention shown in the figure, this gaseous medium is discharged from the compressor chamber R via a gas discharge line 4. The gas produced by the suction process via the opening 2 can now be the Leave the compressor chamber R via the opening 3 and be replaced by the flowing liquid medium. This leads to an increase in the delivery rate and a reduction in the specific compression work.
Das mittels des Kolbens K verdichtete Gas verlässt den Verdichterraum R bei geöffnetem Druckventil D über die Gasabführleitung 6 und wird anschließend über eine Hochdruckleitung einem Verbraucher zugeführt.The gas compressed by means of the piston K leaves the compression chamber R when the pressure valve D is open via the gas discharge line 6 and is then fed to a consumer via a high-pressure line.
Die beiden Öffnungen 2 und 3 sind entsprechend einer vorteilhaften Ausgestaltung des erfindungsgemäßen Verdichters vorzugsweise in Form eines und/oder mehrerer Schlitze ausgebildet.According to an advantageous embodiment of the compressor according to the invention, the two openings 2 and 3 are preferably in the form of one and / or more slots.
Die Öffnungen 2 und 3 sind vorzugsweise an Stellen der Zylinderwand 1 angeordnet, die erst dann von dem Verdichterkolben K überfahren sind bzw. werden, wenn dieser unmittelbar vor seiner oberen Endlage oder in seiner Endlage angelangt ist.The openings 2 and 3 are preferably arranged at locations on the cylinder wall 1 which are or will only be run over by the compressor piston K when it has reached the top end position or end position.
In der Figur sei der Verdichterkolben K in seiner oberen Endlage dargestellt. Die beiden Öffnungen 2 und 3 sind nunmehr freigegeben, so dass über die Öffnung 2 zu verdichtendes, flüssiges Medium aus dem Flüssigkeitsraum F in den Verdichterraum R einströmen kann (dargestellt durch die parallel gezeichneten Pfeile). Dieses einströmende flüssige Medium ergänzt die bereits im Verdichterraum R befindliche Flüssigkeitsmenge F', die aus dem über das Saugventil S während des Saugtraktes einströmenden flüssigen Medium resultiert.In the figure, the compressor piston K is shown in its upper end position. The two openings 2 and 3 are now released, so that liquid medium to be compressed can flow from the liquid space F into the compressor space R via the opening 2 (represented by the arrows drawn in parallel). This inflowing liquid medium supplements the quantity of liquid F 'already in the compressor chamber R, which results from the liquid medium flowing in via the suction valve S during the suction tract.
Über die Öffnung 3 bzw. die Gasabführleitung 4 kann das während des Saugtaktes gebildete gasförmige Medium G' aus dem Verdichterraum R entweichen. Dieses Entweichen des gasförmigen Mediums wird durch das über die Öffnung 2 einströmende flüssige Medium unterstützt, da durch das einströmende flüssige Medium das im Verdichterraum R befindliche gasförmige Medium G' aus dem Verdichterraum R verdrängt wird.The gaseous medium G ′ formed during the suction cycle can escape from the compressor chamber R via the opening 3 or the gas discharge line 4. This escape of the gaseous medium is supported by the liquid medium flowing in via the opening 2, since the gaseous medium G ′ located in the compression space R is displaced from the compression space R by the inflowing liquid medium.
Im Gegensatz zu den bis dato bekannten Verdichterkonstruktionen muss der zwangsläufig entstehende Gasanteil G' des zu verdichtenden Mediums nunmehr nicht mehr mitverdichtet werden, da er vor der Verdichtung aus dem Verdichterraum R abgeführt werden kann. Durch das Vorsehen der Öffnung 2, die mit dem Flüssigkeitsraum F korrespondiert, wird nunmehr sicher gestellt, dass der Verdichterraum R vor der Verdichtung vollständig mit flüssigem Medium F' befüllt wird.In contrast to the previously known compressor designs, the inevitable gas fraction G 'of the medium to be compressed no longer has to be compressed, since it can be removed from the compression chamber R before compression. By providing the opening 2, which with the Liquid space F corresponds, it is now ensured that the compressor space R is completely filled with liquid medium F 'before compression.
In der Figur nicht dargestellt ist eine weitere vorteilhafte Ausgestaltung des erfindungsgemäßen Verdichters, gemäß der das Saugventil S auf seiner demNot shown in the figure is a further advantageous embodiment of the compressor according to the invention, according to which the suction valve S on its
Verdichterkolben K zugewandten Fläche wenigstens eine Vertiefung aufweist; diese ist hierbei derart ausgebildet, dass zwischen dem Saugventil S und dem Verdichterkolben K ein Unterdruck entsteht.Compressor piston K facing surface has at least one recess; this is designed such that a vacuum is created between the suction valve S and the compressor piston K.
Bewegt sich der Verdichterkolben K nunmehr während des Saugtaktes nach oben, wird das Saugventil S aufgrund des entstandenen Unterdruckes zwischen ihm und dem Verdichterkolben K von diesem bewegt bzw. angehoben.If the compressor piston K now moves upwards during the suction cycle, the suction valve S is moved or raised by the latter because of the negative pressure which has developed between it and the compressor piston K.
Die Form der auf der dem Verdichterkolben K zugewandten Fläche des Saugventiles S vorzusehenden Vertiefung(en) kann im Prinzip beliebig gewählt werden; entscheidend ist letztendlich nur, dass es zur Ausbildung eines Unterdruckes zwischen Saugventil S und Verdichterkolben K kommt. Auch können lediglich eine oder aber auch mehrere Vertiefungen vorgesehen werde.The shape of the depression (s) to be provided on the surface of the suction valve S facing the compressor piston K can in principle be chosen as desired; the only thing that ultimately matters is that a vacuum is formed between suction valve S and compressor piston K. It is also possible to provide only one or more wells.
Mittels der vorbeschriebenen Erfindung wird erreicht, dass der Flüssiganteil imBy means of the above-described invention it is achieved that the liquid portion in the
Verdichterraum ansteigt, woraus eine höhere Förderleistung des erfindungsgemäßen Verdichters resultiert. Somit kann eine Verringerung der spezifischen Verdichterleistung bezogen auf die Menge des geförderten bzw. verdichteten Mediums erzielt werden.Compressor space increases, which results in a higher delivery rate of the compressor according to the invention. A reduction in the specific compressor capacity based on the amount of the pumped or compressed medium can thus be achieved.
Die mit dem erfindungsgemäßen Verdichter verbundenen Vorteile werden durch eine gegenüber dem Stand der Technik geringfügig kompliziertere Verdichterkonstruktion erkauft; die mit ihr verbundenen Mehrkosten werden jedoch durch die erreichten Vorteile mehr als kompensiert. The advantages associated with the compressor according to the invention are paid for by a compressor construction which is slightly more complicated than in the prior art; however, the additional costs associated with it are more than offset by the advantages achieved.

Claims

Patentansprüche Claims
1. Verdichter, insbesondere Verdichter für kryogene Medien, vorzugsweise für flüssigen Wasserstoff, aufweisend einen von einer Zylinderwand umgebenen Verdichterraum, in dem ein Verdichterkolben linear bewegt wird, ein Saug- und ein Druckventil, die im Bereich der unteren Endlage des Verdichterkolbens angeordnet sind, und einen den Verdichterraum zumindest teilweise umgebenden Flüssigkeitsraum, dadurch gekennzeichnet, dass die Zylinderwand (1 ) wenigstens eine Öffnung (2), die mit dem Flüssigkeitsraum (F) korrespondiert, und wenigstens eine Öffnung (3), über die gasförmiges Medium aus dem Verdichterraum (R) abgeführt werden kann, aufweist, wobei die Öffnungen (2, 3) an Stellen der Zylinderwand (1 ) angeordnet sind, die von dem Verdichterkolben (K) überfahren werden.1. Compressor, in particular compressor for cryogenic media, preferably for liquid hydrogen, comprising a compressor chamber surrounded by a cylinder wall, in which a compressor piston is moved linearly, a suction and a pressure valve, which are arranged in the region of the lower end position of the compressor piston, and a liquid space at least partially surrounding the compressor space, characterized in that the cylinder wall (1) has at least one opening (2) which corresponds to the liquid space (F) and at least one opening (3) through which gaseous medium from the compressor space (R ) can be removed, the openings (2, 3) being arranged at locations on the cylinder wall (1) which are run over by the compressor piston (K).
2. Verdichter nach Anspruch 1 , dadurch gekennzeichnet, dass die Öffnungen (2, 3) in Form eines und/oder mehrerer Schlitze ausgebildet sind.2. Compressor according to claim 1, characterized in that the openings (2, 3) are designed in the form of one and / or more slots.
3. Verdichter nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Öffnung(en) (3), über die gasförmiges Medium aus dem Verdichterraum (R) abgeführt werden kann, mit einer Gasabführleitung (4) in Wirkverbindung steht bzw. stehen.3. Compressor according to claim 1 or 2, characterized in that the opening (s) (3), via which gaseous medium can be discharged from the compressor chamber (R), is or are operatively connected to a gas discharge line (4).
4. Verdichter nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Öffnungen (2, 3) an Stellen der Zylinderwand (1 ) angeordnet sind, die erst dann von dem Verdichterkolben (K) freigegeben werden, wenn dieser unmittelbar vor seiner oberen Endlage oder in seiner oberen Endlage angelangt ist.4. Compressor according to one of the preceding claims 1 to 3, characterized in that the openings (2, 3) are arranged at locations on the cylinder wall (1) which are only released by the compressor piston (K) when it is immediately in front of it has reached the upper end position or in its upper end position.
5. Verdichter nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Saugventil (S) auf seiner dem Verdichterkolben (K) zugewandten Fläche wenigstens eine Vertiefung aufweist, wobei die Vertiefung derart ausgebildet ist, dass zwischen dem Saugventil (S) und dem Verdichterkolben (K) ein Unterdruck entsteht. 5. Compressor according to one of the preceding claims 1 to 4, characterized in that the suction valve (S) on its surface facing the compressor piston (K) has at least one depression, the depression being designed such that between the suction valve (S) and a vacuum is created in the compressor piston (K).
EP06754048A 2005-06-17 2006-06-01 Cryogenic compressor comprising a high-pressure phase separator Not-in-force EP1915530B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005028200A DE102005028200A1 (en) 2005-06-17 2005-06-17 Cryo-compressor with high-pressure phase separator
PCT/EP2006/005241 WO2006133813A1 (en) 2005-06-17 2006-06-01 Cryogenic compressor comprising a high-pressure phase separator

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EP1915530A1 true EP1915530A1 (en) 2008-04-30
EP1915530B1 EP1915530B1 (en) 2009-01-28

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US (1) US20080213110A1 (en)
EP (1) EP1915530B1 (en)
JP (1) JP4988726B2 (en)
AT (1) ATE422026T1 (en)
DE (2) DE102005028200A1 (en)
WO (1) WO2006133813A1 (en)

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Also Published As

Publication number Publication date
JP2008544135A (en) 2008-12-04
EP1915530B1 (en) 2009-01-28
JP4988726B2 (en) 2012-08-01
WO2006133813A1 (en) 2006-12-21
US20080213110A1 (en) 2008-09-04
DE102005028200A1 (en) 2006-12-21
ATE422026T1 (en) 2009-02-15
DE502006002758D1 (en) 2009-03-19

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