EP1703126A2 - Piston compressor seal - Google Patents

Piston compressor seal Download PDF

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Publication number
EP1703126A2
EP1703126A2 EP06005265A EP06005265A EP1703126A2 EP 1703126 A2 EP1703126 A2 EP 1703126A2 EP 06005265 A EP06005265 A EP 06005265A EP 06005265 A EP06005265 A EP 06005265A EP 1703126 A2 EP1703126 A2 EP 1703126A2
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EP
European Patent Office
Prior art keywords
chamber
piston
plunger
piston ring
engine room
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.)
Withdrawn
Application number
EP06005265A
Other languages
German (de)
French (fr)
Other versions
EP1703126A3 (en
Inventor
Jörg Nickl
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
ITG Kompressoren GmbH
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 Voith Patent GmbH, ITG Kompressoren GmbH filed Critical Voith Patent GmbH
Publication of EP1703126A2 publication Critical patent/EP1703126A2/en
Publication of EP1703126A3 publication Critical patent/EP1703126A3/en
Withdrawn legal-status Critical Current

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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
    • 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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • F04B39/042—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod sealing being provided on the piston

Definitions

  • the invention relates to a reciprocating compressor with plunger, which has an engine room and a working space.
  • the invention is therefore an object of the invention to provide a reciprocating compressor with plunger, in which a significant reduction or prevention of ⁇ lverschleppung is achieved with easy to implement means.
  • the reciprocating compressor according to the invention with plunger having an engine compartment and a working space is characterized in that the plunger has a two-stage piston ring packing, between which two piston ring packings a chamber is arranged whose internal pressure is always higher than the internal pressure of the engine room.
  • the first engine room-side piston ring packing seals the chamber against the engine room, while the second, working-side piston ring packing seals the chamber against the working space.
  • the fact that the internal pressure of the chamber is always higher than the internal pressure of the engine room, can carry over of oil in the working space not done anymore.
  • the compressed gas in the working space remains oil-free.
  • the chamber is designed as an annular chamber on the circumference or in the interior of the plunger.
  • the chamber can be produced, for example, by providing the plunger with a circumferential groove.
  • the chamber is connected via an external throttled connection with a compressed gas source.
  • This compressed gas source provides a gas with a pressure which is higher than the internal pressure of the engine room.
  • the pressurized gas source may provide gas at a pressure corresponding to the pressure level prevailing in the working pressure chamber of the reciprocating compressor immediately before the discharge of the compressed gas.
  • connection is connected to the working pressure chamber of the reciprocating compressor.
  • the working space side piston ring packing is running dry and the engine room side piston ring packing for oil lubrication. This ensures that even by the otherwise required for the lubrication of the piston rings itself amount of oil no contamination of the compressed gas.
  • This higher pressure is established either by a sufficiently large annular chamber on the circumference or in the interior of the piston by the leakage during operation of the reciprocating compressor by itself or is realized by an external throttled connection of the pressurized gas introduced into the chamber above.
  • the compressed gas source can advantageously be used, the working pressure chamber of the reciprocating compressor.
  • the engine-side piston ring packing is standardly designed for oil lubrication with one or more sealing rings and one oil scraper ring.
  • Fig. 1 shows a section through a first embodiment of the piston compressor 7 according to the invention, which has a plunger 8, wherein below the plunger 8 of the engine room 1 of the reciprocating compressor 7 and above the plunger 8 of the working chamber 2 is arranged, in which compresses the working gas becomes. Above the working space 2 is the working pressure chamber 9 with inlet valve and outlet valve.
  • the plunger 8 has a circumferential groove which forms an annular chamber 5 between the plunger 8 and the cylinder of the reciprocating compressor 7.
  • the plunger 8 has a first working-side piston ring pack 3, which is designed for dry running and the chamber 5 seals against the working space 2 of the reciprocating compressor 7.
  • the plunger 8 has a second, engine-side piston ring pack 4, which is designed for oil lubrication and the chamber 5 seals against the engine room 1 of the reciprocating compressor 7.
  • Fig. 2 shows a section through a second embodiment of the piston compressor 7 according to the invention, which is largely identical to the piston compressor 7 of FIG.
  • the chamber 5 is connected via an external throttled port 6 with a compressed gas source.
  • the compressed gas source is the working pressure chamber 9 of the reciprocating compressor 7.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)

Abstract

The compressor has a trunk piston (8) that comprises two-stage piston ring gaskets (3, 4), an engine space (1) and a working space. A chamber (5) is arranged between the ring gaskets, where an internal pressure of the chamber is always higher than the internal pressure of the engine space. One of the piston ring gaskets seals the chamber against the engine space and the other gasket seals the chamber against the working space.

Description

Die Erfindung betrifft einen Kolbenverdichter mit Tauchkolben, der einen Triebwerksraum und einen Arbeitsraum aufweist.The invention relates to a reciprocating compressor with plunger, which has an engine room and a working space.

Das Problem solcher Kolbenverdichter ist, dass ständig eine Ölverschleppung über die Kolbenringe vom Triebwerksraum zum Arbeitsraum hauptsächlich wegen des ständigen Vorzeichenwechsels der Druckdifferenz während jedes Arbeitszyklus stattfindet. Eine solche über die erforderlichen Kolbenringe erfolgende Ölverschleppung vermindert die Qualität des komprimierten Gases und kann in anderen Einrichtungen, welche das komprimierte Gas nutzen, zu Folgeproblemen führen.The problem with such reciprocating compressors is that there is always an oil carry over the piston rings from the engine room to the work space mainly due to the constant change of sign of the pressure difference during each cycle. Such oil carry over the necessary piston rings reduces the quality of the compressed gas and can lead to consequential problems in other devices utilizing the compressed gas.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Kolbenverdichter mit Tauchkolben zu schaffen, bei dem eine deutliche Verringerung bzw. Verhinderung der Ölverschleppung mit einfach zu realisierenden Mitteln erreicht wird.The invention is therefore an object of the invention to provide a reciprocating compressor with plunger, in which a significant reduction or prevention of Ölverschleppung is achieved with easy to implement means.

Diese Aufgabe wird durch einen Kolbenverdichter mit den Merkmalen des Patentanspruchs 1 gelöst. Weitere Ausgestaltungen der Erfindung gehen aus den abhängigen Patentansprüchen hervor.This object is achieved by a reciprocating compressor having the features of patent claim 1. Further embodiments of the invention will become apparent from the dependent claims.

Der erfindungsgemäße Kolbenverdichter mit Tauchkolben mit einem Triebwerksraum und einem Arbeitsraum ist dadurch gekennzeichnet, dass der Tauchkolben eine zweistufige Kolbenringpackung aufweist, wobei zwischen beiden Kolbenringpackungen eine Kammer angeordnet ist, deren Innendruck stets höher ist als der Innendruck des Triebwerksraums. Die erste, triebwerksraumseitige Kolbenringpackung dichtet die Kammer gegen den Triebwerksraum ab, während die zweite, arbeitsraumseitige Kolbenringpackung die Kammer gegen den Arbeitsraum abdichtet. Dadurch, dass der Innendruck der Kammer stets höher ist als der Innendruck des Triebwerksraums, kann eine Verschleppung von Öl in den Arbeitsraum nicht mehr erfolgen. Das im Arbeitsraum komprimierte Gas bleibt ölfrei.The reciprocating compressor according to the invention with plunger having an engine compartment and a working space is characterized in that the plunger has a two-stage piston ring packing, between which two piston ring packings a chamber is arranged whose internal pressure is always higher than the internal pressure of the engine room. The first engine room-side piston ring packing seals the chamber against the engine room, while the second, working-side piston ring packing seals the chamber against the working space. The fact that the internal pressure of the chamber is always higher than the internal pressure of the engine room, can carry over of oil in the working space not done anymore. The compressed gas in the working space remains oil-free.

Gemäß einer ersten Ausgestaltung der Erfindung ist die Kammer als Ringkammer am Umfang bzw. im Inneren des Tauchkolbens ausgeführt. Die Kammer kann beispielsweise dadurch erzeugt werden, dass der Tauchkolben mit einer umlaufenden Nut versehen wird.According to a first embodiment of the invention, the chamber is designed as an annular chamber on the circumference or in the interior of the plunger. The chamber can be produced, for example, by providing the plunger with a circumferential groove.

Gemäß einer weiteren Ausgestaltung der Erfindung ist die Kammer über einen externen gedrosselten Anschluss mit einer Druckgasquelle verbunden. Diese Druckgasquelle stellt ein Gas mit einem Druck zur Verfügung, der höher ist als der Innendruck des Triebwerksraums. Beispielsweise kann die Druckgasquelle Gas mit einem Druck bereitstellen, der dem Druckniveau entspricht, das in der Arbeitsdruckkammer des Kolbenverdichters unmittelbar vor dem Ausstoßen des komprimierten Gases herrscht.According to a further embodiment of the invention, the chamber is connected via an external throttled connection with a compressed gas source. This compressed gas source provides a gas with a pressure which is higher than the internal pressure of the engine room. For example, the pressurized gas source may provide gas at a pressure corresponding to the pressure level prevailing in the working pressure chamber of the reciprocating compressor immediately before the discharge of the compressed gas.

Daher ist gemäß einer vorteilhaften Ausgestaltung der Erfindung vorgesehen, dass der Anschluss mit der Arbeitsdruckkammer des Kolbenverdichters verbunden ist.Therefore, according to an advantageous embodiment of the invention, it is provided that the connection is connected to the working pressure chamber of the reciprocating compressor.

Gemäß einer weiteren Ausgestaltung der Erfindung ist vorgesehen, dass die arbeitsraumseitige Kolbenringpackung trocken laufend und die triebwerksraumseitige Kolbenringpackung für Ölschmierung ausgeführt ist. Dadurch wird sichergestellt, dass auch durch die sonst für die Schmierung der Kolbenringe selbst benötigte Ölmenge keine Verunreinigung des komprimierten Gases erfolgt.According to a further embodiment of the invention it is provided that the working space side piston ring packing is running dry and the engine room side piston ring packing for oil lubrication. This ensures that even by the otherwise required for the lubrication of the piston rings itself amount of oil no contamination of the compressed gas.

Mit der Kammer wird ein Vorzeichenwechsel der Druckdifferenz über der triebwerksraumseitigen ölgeschmierten Kolbenringpackung verhindert, wenn der Innendruck im Arbeitsraum unter den Innendruck im Triebwerksraum sinkt. Um das zu erreichen, muss in der Kammer stets ein höherer Druck vorhanden sein als im Triebwerksraum.With the chamber a sign change of the pressure difference over the engine-room-side oil-lubricated piston ring packing is prevented when the internal pressure in the working space drops below the internal pressure in the engine room. To achieve this, there must always be a higher pressure in the chamber than in the engine room.

Dieser höhere Druck stellt sich entweder durch eine ausreichend große ringförmige Kammer am Umfang bzw. im Inneren des Kolbens durch die Leckage während des Betriebes des Kolbenverdichters von selbst ein oder wird durch einen externen gedrosselten Anschluss von dem darüber in die Kammer eingeleiteten Druckgas realisiert. Als Druckgasquelle kann vorteilhaft die Arbeitsdruckkammer des Kolbenverdichters genutzt werden.This higher pressure is established either by a sufficiently large annular chamber on the circumference or in the interior of the piston by the leakage during operation of the reciprocating compressor by itself or is realized by an external throttled connection of the pressurized gas introduced into the chamber above. As the compressed gas source can advantageously be used, the working pressure chamber of the reciprocating compressor.

Während die arbeitsraumseitige Kolbenringpackung somit trocken laufend dichtet, ist die triebwerksraumseitige Kolbenringpackung standardmäßig für Ölschmierung mit einem oder mehreren Dichtringen und einem Ölabstreifring ausgeführt.While the working-chamber-side piston ring packing thus seals in a dry running manner, the engine-side piston ring packing is standardly designed for oil lubrication with one or more sealing rings and one oil scraper ring.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen und zugehörigen Zeichnungen näher erläutert. Dabei zeigen

Fig. 1
einen Kolbenverdichter mit Tauchkolben sowie zwei Kolbenringpackungen mit dazwischen liegender Kammer mit höherem Innendruck als im Triebwerksraum; und
Fig. 2
einen Kolbenverdichter mit Tauchkolben, bei dem die zwischen den Kolbenringpackungen befindliche Kammer über einen gedrosselten Anschluss mit einer Druckgasquelle verbunden ist.
The invention will be explained in more detail with reference to embodiments and accompanying drawings. Show
Fig. 1
a piston compressor with plunger and two piston ring packs with intermediate chamber with higher internal pressure than in the engine room; and
Fig. 2
a piston compressor with plunger, wherein the chamber located between the piston ring packages is connected via a throttled port to a source of compressed gas.

Die für den Betrieb des Kolbenverdichters erforderlichen Lamellenventile sind in den Figuren nicht dargestellt.The lamella valves required for the operation of the reciprocating compressor are not shown in the figures.

Fig. 1 zeigt einen Schnitt durch ein erstes Ausführungsbeispiel des erfindungsgemäßen Kolbenverdichters 7, der einen Tauchkolben 8 aufweist, wobei sich unterhalb des Tauchkolbens 8 der Triebwerksraum 1 des Kolbenverdichters 7 befindet und oberhalb des Tauchkolbens 8 der Arbeitsraum 2 angeordnet ist, in welchem das Arbeitsgas verdichtet wird. Oberhalb des Arbeitsraums 2 befindet sich der Arbeitsdruckraum 9 mit Einlassventil und Auslassventil.Fig. 1 shows a section through a first embodiment of the piston compressor 7 according to the invention, which has a plunger 8, wherein below the plunger 8 of the engine room 1 of the reciprocating compressor 7 and above the plunger 8 of the working chamber 2 is arranged, in which compresses the working gas becomes. Above the working space 2 is the working pressure chamber 9 with inlet valve and outlet valve.

Der Tauchkolben 8 weist eine umlaufende Nut auf, die eine ringförmige Kammer 5 zwischen dem Tauchkolben 8 und dem Zylinder des Kolbenverdichters 7 bildet. Oberhalb der Kammer 5 weist der Tauchkolben 8 eine erste, arbeitsraumseitige Kolbenringpackung 3 auf, die für Trockenlauf ausgelegt ist und die Kammer 5 gegen den Arbeitsraum 2 des Kolbenverdichters 7 abdichtet. Unterhalb der Kammer 5 weist der Tauchkolben 8 eine zweite, triebwerksraumseitige Kolbenringpackung 4 auf, die für Ölschmierung ausgelegt ist und die Kammer 5 gegen den Triebwerksraum 1 des Kolbenverdichters 7 abdichtet.The plunger 8 has a circumferential groove which forms an annular chamber 5 between the plunger 8 and the cylinder of the reciprocating compressor 7. Above the chamber 5, the plunger 8 has a first working-side piston ring pack 3, which is designed for dry running and the chamber 5 seals against the working space 2 of the reciprocating compressor 7. Below the chamber 5, the plunger 8 has a second, engine-side piston ring pack 4, which is designed for oil lubrication and the chamber 5 seals against the engine room 1 of the reciprocating compressor 7.

Bei dieser Ausgestaltung der Erfindung stellt sich der erforderliche Druck in der Kammer 5 durch die Leckage während des Betriebes des Kolbenverdichters 7 von selbst ein.In this embodiment of the invention, the required pressure in the chamber 5 by the leakage during operation of the reciprocating compressor 7 by itself.

Fig. 2 zeigt einen Schnitt durch ein zweites Ausführungsbeispiel des erfindungsgemäßen Kolbenverdichters 7, der mit dem Kolbenverdichter 7 aus Fig. 1 weitgehend identisch ist. Der Unterschied zwischen beiden Ausführungsbeispielen liegt darin, dass die Kammer 5 über einen externen gedrosselten Anschluss 6 mit einer Druckgasquelle verbunden ist. Im dargestellten Beispiel ist die Druckgasquelle die Arbeitsdruckkammer 9 des Kolbenverdichters 7. Auf diese Weise wird auf einfache und kostengünstige Art sichergestellt, dass der Innendruck der Kammer 5 stets höher ist als der Innendruck des Triebwerksraums 1, so dass eine Verschleppung von Öl in den Arbeitsraum 2 nicht mehr erfolgen kann.Fig. 2 shows a section through a second embodiment of the piston compressor 7 according to the invention, which is largely identical to the piston compressor 7 of FIG. The difference between the two embodiments is that the chamber 5 is connected via an external throttled port 6 with a compressed gas source. In the illustrated example, the compressed gas source is the working pressure chamber 9 of the reciprocating compressor 7. In this way it is ensured in a simple and cost-effective manner that the internal pressure of the chamber 5 is always higher than the internal pressure of the engine compartment 1, so that a carryover of oil into the working space. 2 can not be done anymore.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
TriebwerksraumMachine Room
22
Arbeitsraumworking space
33
arbeitsraumseitige KolbenringpackungWork-side piston ring packing
44
triebwerksraumseitige KolbenringpackungEngine room-side piston ring packing
55
Kammer (ringförmig)Chamber (ring-shaped)
66
Anschluss für DruckgasConnection for compressed gas
77
Kolbenverdichterpiston compressor
88th
Tauchkolbenplunger
99
ArbeitsdruckkammerWorking pressure chamber

Claims (5)

Kolbenverdichter mit Tauchkolben mit einem Triebwerksraum und einem Arbeitsraum, dadurch gekennzeichnet, dass der Tauchkolben (8) eine zweistufige Kolbenringpackung (3, 4) aufweist, wobei zwischen beiden Kolbenringpackungen (3, 4) eine Kammer (5) angeordnet ist, deren Innendruck stets höher ist als im Triebwerksraum (1).Piston compressor with plunger piston with an engine room and a working space, characterized in that the plunger (8) has a two-stage piston ring packing (3, 4), between the two piston ring packages (3, 4) a chamber (5) is arranged, the internal pressure is always higher is as in the engine room (1). Kolbenverdichter nach Anspruch 1, dadurch gekennzeichnet, dass die Kammer (5) als Ringkammer am Umfang bzw. im Inneren des Tauchkolbens (8) ausgeführt ist.Piston compressor according to claim 1, characterized in that the chamber (5) is designed as an annular chamber on the circumference or in the interior of the plunger (8). Kolbenverdichter nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die Kammer (5) über einen externen gedrosselten Anschluss (6) mit einer Druckgasquelle (Druckniveau) verbunden ist.Piston compressor according to claim 1 and 2, characterized in that the chamber (5) via an external throttled port (6) with a compressed gas source (pressure level) is connected. Kolbenverdichter nach Anspruch 3, dadurch gekennzeichnet, dass der Anschluss (6) mit der Arbeitsdruckkammer (9) verbunden ist.Piston compressor according to claim 3, characterized in that the connection (6) is connected to the working pressure chamber (9). Kolbenverdichter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die arbeitsraumseitige Kolbenringpackung (3) trocken laufend und die triebwerksraumseitige Kolbenringpackung (4) für Ölschmierung ausgeführt ist.Piston compressor according to one of claims 1 to 4, characterized in that the working space side piston ring packing (3) running dry and the engine room side piston ring packing (4) is designed for oil lubrication.
EP06005265A 2005-03-15 2006-03-15 Piston compressor seal Withdrawn EP1703126A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510012203 DE102005012203A1 (en) 2005-03-15 2005-03-15 Piston compressor with plunger

Publications (2)

Publication Number Publication Date
EP1703126A2 true EP1703126A2 (en) 2006-09-20
EP1703126A3 EP1703126A3 (en) 2011-03-02

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EP06005265A Withdrawn EP1703126A3 (en) 2005-03-15 2006-03-15 Piston compressor seal

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DE (1) DE102005012203A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588252A (en) * 2012-02-20 2012-07-18 武汉理工大学 Oil-leakage-prevention and gas-sealing structure of piston of vehicle high speed air compressor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224866A (en) * 1923-11-12 1925-03-19 Fried Krupp Germaniawerft Ag Improvements in pistons for high-pressure compressors and the like
US2411020A (en) * 1943-10-27 1946-11-12 Denison Eng Co Fluid compressing apparatus
US3272092A (en) * 1964-02-27 1966-09-13 Bosch Gmbh Robert Lubricating arrangement for a reciprocating compressor
FR1543409A (en) * 1967-09-12 1968-10-25 Alsacienne Constr Meca Improvements made to pistons, especially compressors
US3620652A (en) * 1968-12-13 1971-11-16 Philips Corp Compressor with rolling diaphragm seal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224866A (en) * 1923-11-12 1925-03-19 Fried Krupp Germaniawerft Ag Improvements in pistons for high-pressure compressors and the like
US2411020A (en) * 1943-10-27 1946-11-12 Denison Eng Co Fluid compressing apparatus
US3272092A (en) * 1964-02-27 1966-09-13 Bosch Gmbh Robert Lubricating arrangement for a reciprocating compressor
FR1543409A (en) * 1967-09-12 1968-10-25 Alsacienne Constr Meca Improvements made to pistons, especially compressors
US3620652A (en) * 1968-12-13 1971-11-16 Philips Corp Compressor with rolling diaphragm seal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102588252A (en) * 2012-02-20 2012-07-18 武汉理工大学 Oil-leakage-prevention and gas-sealing structure of piston of vehicle high speed air compressor

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Publication number Publication date
DE102005012203A1 (en) 2006-09-28
EP1703126A3 (en) 2011-03-02

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