EP0994252B1 - Compressor for the production of oil free air - Google Patents
Compressor for the production of oil free air Download PDFInfo
- Publication number
- EP0994252B1 EP0994252B1 EP99119190A EP99119190A EP0994252B1 EP 0994252 B1 EP0994252 B1 EP 0994252B1 EP 99119190 A EP99119190 A EP 99119190A EP 99119190 A EP99119190 A EP 99119190A EP 0994252 B1 EP0994252 B1 EP 0994252B1
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- EP
- European Patent Office
- Prior art keywords
- compressor
- oil
- space
- cylinder head
- housing section
- 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.)
- Expired - Lifetime
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-
- 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
- F04B27/08—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis
- F04B27/10—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B27/1036—Component parts, details, e.g. sealings, lubrication
- F04B27/109—Lubrication
Definitions
- the invention relates to a compressor according to the preamble of patent claim 1.
- Compressors of the generic type are particularly suitable for installation in motor vehicles. It is provided that the compressor is connected to the lubricating oil and cooling water circuit of the vehicle engine. However, it is not always advantageous for the compressor to be connected to these circuits due to the high load on the vehicle engines and the not always guaranteed maintenance of these media.
- the cooling water and also the lubricating oil are strongly heated by the engine. As a result, the cooling effect for the compressor is often very low.
- the compressor is exposed by the installation in the immediate vicinity of the vehicle engine, the radiated heat from the engine. Dry-running piston rings made of plastic are provided for compressors for the procurement of oil-free compressed air. For the life of these piston rings a good cooling but is of crucial importance.
- the object of the invention is to develop a compressor of the generic type so that a dissipation of heat from the hot zones is achieved in less thermally stressed areas. It should also be possible to drive the compressor separately from the drive of a main drive, preferably using a separate electric motor, such that the compressor is universally applicable.
- the cooling should in particular be such that the production of oil-free compressed air is ensured when using piston rings made of plastic.
- the compressor z. B. By using its own permanent lubricating oil and cooling oil circuit, it is possible to use the compressor z. B. to accommodate anywhere within a vehicle; in this case, the compressor is powered by an electric motor. This in turn has the advantage that the compressor provides a constant capacity regardless of the respective speed of the vehicle engine. In addition, the compressor can be put into operation before the vehicle engine is started. This is an advantage if a fast driving is desired.
- the integrated lubricating oil and cooling oil supply also makes the compressor particularly suitable for installation in stationary air supply systems.
- the type of cooling with encapsulated design of the compressor makes the use of plastic for essential components possible; this concerns in particular housing sections which can be clamped in sandwich construction between the engine area and the cylinder head.
- the swash plate drive axial piston compressor shown in the drawing has, within a multi-part housing, an oil-lubricated engine 1 which consists essentially of a swash plate 5 and hemispheres 7 mounted in bearing cups 9 mounted on a drive shaft 3.
- the engine 1 of known per se operation is used to bring about 3 linear movements of the piston 11 carrying piston rods 13 upon rotation of the drive shaft.
- the pistons act alternately with respect to check valves 15 of a cylinder head 17, in which a common pressure port 19 is located.
- the bearing of the piston rods 13 takes place in bearing bushes 21 on the oil-lubricated engine side of the compressor, as explained below.
- the bushings 21 extend on a pitch circle at an angular distance from each other parallel to the longitudinal axis of the compressor through a central housing portion 23, on which the piston facing ölabstMailde sealing elements 25 are provided.
- chambers 27 are connected by an annular space 29 to a common suction chamber, in which a suction port 31 opens.
- Each of the chambers 27 located on the rear side of the pistons 11 - acting as a suction chamber - is separated from the pressure chamber 33 by the piston, each of the pistons carrying a suction valve 35.
- This suction valve establishes the connection between the suction chamber and the pressure chamber during the suction stroke of the piston, wherein the valve opens at the left as shown movement of the piston, such that air through the suction port 31, the annular space 29 and the chamber 27 in the pressure chamber 33 passes and at subsequent, as shown in the drawing to the right directed movement in closing the suction valve 35 via the check valve 15 shown in the sectional view and a common pressure chamber 37 is pushed into the pressure port 19.
- the oil circuit of the compressor described above with respect to its essential components is designed so that it transmits the heat accumulating mainly in the region of the cylinder head and the compression chambers on the largest possible and highly conductive surface.
- the compressor is divided into two volume areas, which are permanently filled with different amounts of oil. There are two areas which are separated by check valves 39 and 41 in the rest position of the compressor. The check valves open during operation of the compressor in a predetermined direction, as explained below.
- the amount of oil required to operate the compressor is introduced into the compressor during manufacture.
- filling openings 43 and 45 are provided in the multi-part housing of the compressor.
- the reproduced in the sectional view right area of the compressor is the one with the higher thermal stress. In this area, all of the below-explained coolant chambers are filled via the filling opening 43 to 100% with oil.
- the illustrated in the sectional drawing left area, which is separated at rest by means of the check valves with respect to the right area, essentially represents the area of the engine of the compressor.
- oil is introduced through the filling opening 45 only to a predetermined level; a higher amount of oil would unnecessarily increase the panschiere and thus the energy consumption of the compressor.
- the drive shaft carrying the impeller is provided in the region of the space 55 with a radial transverse bore 57, to which a continuous axial bore 59 in the drive shaft 3 is connected. From the bore 59 branch off at the left end of the same transverse bores 61.
- the housing portion 63 is made of a good thermal conductivity metal and provided with said cooling fins. The oil takes over the engine 1 at the same time the lubrication of all bearings.
- annular space 69 This annular space is connected by (not shown) connecting holes in the partition 71 of the housing with annular spaces 73 which cylinder liners 75 of the piston 11th surround.
- the oil flows around the cylinder liners radially outward into an annular space 77 and flows around in this outer region below the outer edge of a guide plate 79. From there, the oil, which flows around the sealed area of the check valves, again in the space 51st
- the baffle 79 fulfills a number of functions. On the one hand, it causes the oil, before it enters the space 51, to flow around the cylinder liners 75 on all sides. Another function of the baffle is that the available cooling surface is increased to dissipate heat. Since the baffle 79 rests flat on the particularly hot upper portion of the cylinder liners 75, it increases the heat transfer surface Finally, the baffle in the center of the compressor, the separation of the spaces 51 and 53 and is provided as a support or holder for the check valve 41. Accordingly, the baffle consists overall of a disc which covers almost the entire circumference of the compressor and which is adapted to the shape of the cylinder head.
- the oil After passing the outer edge of the baffle, the oil passes in the above manner in the space 51, which is limited in the central position through the cylinder head floor and is sucked into the space 53 after passing through the check valve 41.
- the housing consists of three housing sections, namely from the existing diecasting or the like metal housing portion 63 and the preferably made of plastic housing portions 23 and 85.
- the two housing sections 23 and 85 come at any point with the hot air in contact, so that it is possible to produce them inexpensively from plastic, in equally cost-effective manner for the drive shaft and the piston rod required bearing bushes can be injected.
- the two aforementioned housing sections 23 and 85 made of plastic are clamped in a so-called sandwich construction between components made of metal, ie between the housing section 63 and the cylinder head 17, wherein the tension is effected by screws 87.
- Another advantage of the intensive cooling of the cylinder liners 75 is an extension of the service life of the piston rings 89 of the piston 11, so that the piston rings can be designed to run dry dry oil-free compressed air. This represents a further significant advantage of the flow of the oil in the sealed compressor according to the invention.
Description
Die Erfindung betrifft einen Kompressor nach dem Gattungsbegriff des Patentanspruchs 1.The invention relates to a compressor according to the preamble of patent claim 1.
Kompressoren der gattungsgemäßen Art (DE 197 06 066 A1) sind insbesondere für den Einbau in Kraftfahrzeugen geeignet. Hierbei ist vorgesehen, daß der Kompressor an den Schmieröl- und Kühlwasserkreislauf des Fahrzeugmotors angeschlossen ist. Bei der hohen Belastung der Fahrzeugmotoren und der nicht immer gewährleisteten Wartung dieser Medien ist es jedoch nicht immer von Vorteil für den Kompressor, an diese Kreisläufe angeschlossen zu sein. Das Kühlwasser und auch das Schmieröl werden vom Motor stark aufgeheizt. Dadurch ist die Kühlwirkung für den Kompressor oft sehr gering. Außerdem ist durch den Einbau in unmittelbarer Nähe des Fahrzeugmotors der Kompressor der vom Motor abgestrahlten Wärme ausgesetzt. Bei Kompressoren für die Beschaffung von ölfreier Druckluft sind trockenlaufende Kolbenringe aus Kunststoff vorgesehen. Für die Standzeit dieser Kolbenringe ist eine gute Kühlung aber von entscheidender Bedeutung.Compressors of the generic type (DE 197 06 066 A1) are particularly suitable for installation in motor vehicles. It is provided that the compressor is connected to the lubricating oil and cooling water circuit of the vehicle engine. However, it is not always advantageous for the compressor to be connected to these circuits due to the high load on the vehicle engines and the not always guaranteed maintenance of these media. The cooling water and also the lubricating oil are strongly heated by the engine. As a result, the cooling effect for the compressor is often very low. In addition, the compressor is exposed by the installation in the immediate vicinity of the vehicle engine, the radiated heat from the engine. Dry-running piston rings made of plastic are provided for compressors for the procurement of oil-free compressed air. For the life of these piston rings a good cooling but is of crucial importance.
Davon ausgehend, besteht die Aufgabe der Erfindung darin, einen Kompressor der gattungsgemäßen Art so weiterzubilden, daß eine Abführung der Wärme aus den heißen Zonen in thermisch weniger beanspruchte Bereiche erreicht wird. Es soll hierbei auch möglich sein, den Kompressor getrennt vom Antrieb eines Hauptantriebs, vorzugsweise unter Verwendung eines gesonderten Elektromotors, anzutreiben, derart, daß der Kompressor universell einsetzbar ist. Die Kühlung soll im besonderen so beschaffen sein, daß die Erzeugung ölfreier Druckluft bei Verwendung von Kolbenringen aus Kunststoff gewährleistet bleibt.On this basis, the object of the invention is to develop a compressor of the generic type so that a dissipation of heat from the hot zones is achieved in less thermally stressed areas. It should also be possible to drive the compressor separately from the drive of a main drive, preferably using a separate electric motor, such that the compressor is universally applicable. The cooling should in particular be such that the production of oil-free compressed air is ensured when using piston rings made of plastic.
Erfindungsgemäß wird die Aufgabe durch die Merkmale des Patentanspruches 1 gelöst.According to the invention the object is achieved by the features of claim 1.
Durch die Verwendung eines eigenen dauerhaften Schmieröl- und Kühlölkreislaufs besteht die Möglichkeit, den Kompressor z. B. an beliebiger Stelle innerhalb eines Fahrzeuges unterzubringen; in diesem Fall ist der Kompressor durch einen E-Motor angetrieben. Dies wiederum hat den Vorteil, daß der Kompressor unabhängig von der jeweiligen Drehzahl des Fahrzeugmotors eine konstante Förderleistung erbringt. Außerdem kann der Kompressor in Betrieb genommen werden, bevor der Fahrzeugmotor gestartet wird. Dies ist von Vorteil, wenn eine schnelle Fahrbereitschaft gewünscht wird.By using its own permanent lubricating oil and cooling oil circuit, it is possible to use the compressor z. B. to accommodate anywhere within a vehicle; in this case, the compressor is powered by an electric motor. This in turn has the advantage that the compressor provides a constant capacity regardless of the respective speed of the vehicle engine. In addition, the compressor can be put into operation before the vehicle engine is started. This is an advantage if a fast driving is desired.
Die integrierte Schmieröl- und Kühlölversorgung macht den Kompressor auch für den Einbau in stationäre Luftbeschaffungsanlagen besonders geeignet. Die Art der Kühlung bei gekapselter Bauweise des Kompressors macht die Verwendung von Kunststoff für wesentliche Bauteile möglich; dies betrifft insbesondere Gehäuseabschnitte, welche in Sandwich-Bauweise zwischen dem Triebwerksbereich und dem Zylinderkopf eingespannt werden können.The integrated lubricating oil and cooling oil supply also makes the compressor particularly suitable for installation in stationary air supply systems. The type of cooling with encapsulated design of the compressor makes the use of plastic for essential components possible; this concerns in particular housing sections which can be clamped in sandwich construction between the engine area and the cylinder head.
Vorteilhafte Ausgestaltungen und Weiterbildungen des Erfindungsgegenstandes sind in weiteren Patentansprüchen aufgeführt.Advantageous embodiments and further developments of the subject invention are listed in further claims.
Die Erfindung ist nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung erläutert. Diese zeigt in Längsschnittansicht einen Kompressor gemäß der Erfindung.The invention is explained below with reference to an embodiment with reference to the drawing. This shows in longitudinal section view of a compressor according to the invention.
Der in der Zeichnung dargestellte Axialkolbenkompressor mit Taumelscheibenantrieb weist innerhalb eines mehrteiligen Gehäuses ein ölgeschmiertes Triebwerk 1 auf, welches im wesentlichen aus einer auf einer Antriebswelle 3 gelagerten Taumelscheibe 5 und Halbkugeln 7 in Lagerpfannen 9 besteht. Das Triebwerk 1 von an sich bekannter Wirkungsweise wird verwendet, um bei Drehung der Antriebswelle 3 geradlinige Bewegungen der Kolben 11 tragenden Kolbenstangen 13 herbeizuführen. Die Kolben wirken wechselweise gegenüber Rückschlagventilen 15 eines Zylinderkopfes 17, in welchem sich ein gemeinsamer Druckanschluß 19 befindet.The swash plate drive axial piston compressor shown in the drawing has, within a multi-part housing, an oil-lubricated engine 1 which consists essentially of a swash plate 5 and hemispheres 7 mounted in bearing cups 9 mounted on a
Die Lagerung der Kolbenstangen 13 erfolgt in Lagerbuchsen 21 auf der ölgeschmierten Triebwerksseite des Kompressors, wie nachfolgend erläutert ist. Die Lagerbuchsen 21 erstrecken sich auf einem Teilkreis unter Winkelabstand zueinander parallel zur Längsachse des Kompressors durch einen mittleren Gehäuseabschnitt 23, an welchem den Kolben zugewandt ölabstreifende Abdichtelemente 25 vorgesehen sind. An der Rückseite der Kolben 11 befindliche Kammern 27 sind durch einen Ringraum 29 zu einem gemeinsamen Saugraum verbunden, in welchen ein Sauganschluß 31 mündet. Jede der an der Rückseite der Kolben 11 befindlichen Kammern 27 - als Saugraum wirkend - ist jeweils durch den Kolben von einer Druckkammer 33 getrennt, wobei jeder der Kolben ein Saugventil 35 trägt. Dieses Saugventil stellt während des Saughubes des Kolbens die Verbindung zwischen dem Saugraum und dem Druckraum her, wobei sich das Ventil bei gemäß Darstellung nach links gerichteter Bewegung des Kolbens öffnet, derart, daß Luft durch den Sauganschluß 31, den Ringraum 29 und die Kammer 27 in die Druckkammer 33 gelangt und bei nachfolgender, gemäß Darstellung in der Zeichnung nach rechts gerichteter Bewegung bei sich schließendem Saugventil 35 über das in der Schnittansicht dargestellte Rückschlagventil 15 und eine gemeinsame Druckkammer 37 in den Druckanschluß 19 ausgeschoben wird.The bearing of the
Der Ölkreislauf des vorstehend hinsichtlich seiner wesentlichen Bauteile beschriebenen Kompressors ist so ausgeführt, daß er die vorwiegend im Bereich des Zylinderkopfs und der Kompressionsräume anfallende Wärme auf eine möglichst große und gut leitfähige Oberfläche überträgt. Gemäß der Erfindung ist der Kompressor in zwei Volumenbereiche aufgeteilt, die mit unterschiedlichen Ölmengen dauerhaft befüllt sind. Es handelt sich um zwei Bereiche, welche in Ruhestellung des Kompressors durch Rückschlagventile 39 und 41 voneinander getrennt sind. Die Rückschlagventile öffnen bei Betrieb des Kompressors in vorbestimmter Richtung, wie nachfolgend erläutert ist.The oil circuit of the compressor described above with respect to its essential components is designed so that it transmits the heat accumulating mainly in the region of the cylinder head and the compression chambers on the largest possible and highly conductive surface. According to the invention, the compressor is divided into two volume areas, which are permanently filled with different amounts of oil. There are two areas which are separated by
Die zum Betrieb des Kompressors erforderliche Ölmenge wird bei der Herstellung des Kompressors in diesen eingefüllt. Zu diesem Zweck sind im mehrteiligen Gehäuse des Kompressors Einfüllöffnungen 43 und 45 vorgesehen. Der in der Schnittdarstellung wiedergegebene rechte Bereich des Kompressors ist der mit der höheren thermischen Beanspruchung. In diesem Bereich werden alle nachfolgend erläuterten Kühlmittelräume über die Einfüllöffnung 43 zu 100 % mit Öl gefüllt. Der in der Schnittzeichnung dargestellte linke Bereich, welcher im Ruhezustand mittels der Rückschlagventile gegenüber dem rechten Bereich getrennt ist, stellt im wesentlichen den Bereich des Triebwerks des Kompressors dar. Hier wird Öl über die Einfüllöffnung 45 nur bis zu einem vorbestimmten Pegel eingefüllt; eine höhere Ölmenge würde unnötigerweise die Panschleistung und damit den Energieverbrauch des Kompressors erhöhen.The amount of oil required to operate the compressor is introduced into the compressor during manufacture. For this purpose, filling
Nachfolgend sind die Bauteile für den Öltransport zwischen den beiden Bereichen des Kompressors erläutert:The components for oil transport between the two areas of the compressor are explained below:
Auf der Antriebswelle 3 des Kompressors sitzt ein Pumpenrad 47, welches mit seinem Außenumfang in einer vom Gehäuseabschnitt 23 sich erstreckenden Buchse 49 geführt ist. Durch die Saugwirkung des Pumpenrades wird das Öl aus dem Raum 51 über das Rückschlagventil 41 in den Raum 53 gesaugt und gelangt über das Pumpenrad 47 in den Raum 55, welcher die Druckseite zum Raum 53 darstellt. Die das Pumpenrad tragende Antriebswelle ist im Bereich des Raums 55 mit einer radialen Querbohrung 57 versehen, an welche sich eine durchgehende axiale Bohrung 59 in der Antriebswelle 3 anschließt. Von der Bohrung 59 zweigen am linksseitigen Ende derselben Querbohrungen 61 ab. Durch den Druck des Öls wird dieses durch die vorgenannte Querbohrung 57 in die Bohrung 59 und dann mittels der Querbohrungen 61 in das Triebwerk 1 des Kompressors gefördert. Durch die rotierenden Bauteile des Triebwerks, im wesentlichen durch die Taumelscheibe 5, wird das Öl an die Wand des linksseitigen Gehäuseabschnitts 63 geschleudert: von dort läuft das Öl nach unten in den Ölsumpf 65. Hierbei gibt das Öl die aus dem heißen Bereich des Kompressors aufgenommene Wärme an den Gehäuseabschnitt 63 ab, derart, daß die Wärme über die dargestellten Kühlrippen 67 an die Außenluft abgeführt wird. Zu diesem Zwecke ist der Gehäuseabschnitt 63 aus einem gut wärmeleitfähigen Metall gefertigt und mit den genannten Kühlrippen versehen. Das Öl übernimmt im Triebwerk 1 gleichzeitig die Schmierung aller Lagerstellen.On the
Im weiteren Verlauf wird das Öl aus dem Ölsumpf 65 in Strömungsrichtung des Rückschlagventils 39 und durch dieses hindurch in einen Ringraum 69 gefordert Dieser Ringraum ist durch (nicht dargestellte) Verbindungsbohrungen in der Trennwand 71 des Gehäuses mit Ringräumen 73 verbunden, welche Zylinderlaufbuchsen 75 der Kolben 11 umgeben. Das Öl strömt um die Zylinderlaufbuchsen radial nach außen in einen Ringraum 77 und umströmt in diesem äußeren Bereich nachfolgend die Außenkante eines Leitblechs 79. Von dort gelangt das Öl, welches den abgedichteten Bereich der Rückschlagventile umströmt, wieder in den Raum 51.In the further course of the oil from the
Das Leitblech 79 erfüllt mehrere-Funktionen Zum einen bewirkt es, daß das Öl, bevor es in den Raum 51 gelangt, die Zylinderlaufbuchsen 75 allseitig umströmt. Eine weitere Funktion des Leitblechs besteht darin, daß die zur Verfügung stehende Kühlfläche zur Ableitung von Wärme vergrößert wird. Da das Leitblech 79 plan auf dem besonders heißen oberen Bereich der Zylinderlaufbuchsen 75 aufliegt, vergrößert es deren wärmeübertragende Oberfläche Schließlich besorgt das Leitblech im Zentrum des Kompressors die Trennung der Raume 51 und 53 und ist als Träger bzw. Halterung für das Rückschlagventil 41 vorgesehen. Das Leitblech besteht demnach insgesamt aus einer nahezu den gesamten Umfang des Kompressors abdekkenden Scheibe, welche der Formgebung des Zylinderkopfs angepaßt ist.The
Nach Passieren der Außenkante des Leitblechs gelangt das Öl in der vorstehend genannten Weise in den Raum 51, welcher in mittiger Lage durch den Zylinderkopfboden begrenzt ist und wird nach Passieren des Rückschlagventils 41 in den Raum 53 angesaugt.After passing the outer edge of the baffle, the oil passes in the above manner in the
Die vorstehend anhand der Strömungsführung des Öls erläuterte intensive Art der Kühlung ermöglicht die gekapselte Bauweise des Kompressors. Im dargestellten Ausführungsbeispiel besteht das Gehäuse aus drei Gehäuseabschnitten, nämlich aus dem aus Druckgußmaterial oder dgl Metall bestehenden Gehäuseabschnitt 63 und aus den vorzugsweise aus Kunststoff bestehenden Gehäuseabschnitten 23 und 85. Die beiden Gehäuseabschnitte 23 und 85 kommen an keiner Stelle mit der heißen Druckluft in Berührung, so daß es möglich ist, sie kostengünstig aus Kunststoff herzustellen, wobei in gleichfalls kostengünstiger Weise die für die Antriebswelle und die Kolbenstange nötigen Lagerbuchsen eingespritzt werden können. Die beiden vorgenannten Gehäuseabschnitte 23 und 85 aus Kunststoff sind in einer sogenannten Sandwich-Bauweise zwischen Bauteilen aus Metall d. h. zwischen dem Gehäuseabschnitt 63 und dem Zylinderkopf 17 eingespannt, wobei die Verspannung durch Schrauben 87 erfolgt.The above explained on the basis of the flow guidance of the oil intensive type of cooling allows the encapsulated construction of the compressor. In the illustrated embodiment, the housing consists of three housing sections, namely from the existing diecasting or the like
Ein weiterer Vorteil der intensiven Kühlung der Zylinderlaufbuchsen 75 besteht in einer Verlängerung der Standzeit der Kolbenringe 89 der Kolben 11, so daß die Kolbenringe zur Erzeugung ölfreier Druckluft trocken laufend ausgelegt werden können. Dies stellt einen weiteren wesentlichen Vorteil der Strömungsführung des Öls im gekapselten Kompressor gemäß der Erfindung dar.Another advantage of the intensive cooling of the
- 1 =1 =
- Triebwerkengine
- 3 =3 =
- Antriebswelledrive shaft
- 5 =5 =
- Taumelscheibeswash plate
- 7 =7 =
- Halbkugelhemisphere
- 9 =9 =
- Lagerpfannebearing cup
- 11 =11 =
- Kolbenpiston
- 13 =13 =
- Kolbenstangepiston rod
- 15 =15 =
- Rückschlagventilcheck valve
- 17 =17 =
- Zylinderkopfcylinder head
- 19 =19 =
- Druckanschlußpressure connection
- 21 =21 =
- Lagerbuchsebearing bush
- 23 =23 =
- Gehäuseabschnitthousing section
- 25 =25 =
- Abdichtelementsealing
- 27 =27 =
- Kammerchamber
- 29 =29 =
- Ringraumannulus
- 31 =31 =
- Sauganschlußsuction
- 33 =33 =
- Druckkammerpressure chamber
- 35 =35 =
- Saugventilsuction
- 377 =377 =
- Druckkammerpressure chamber
- 39 =39 =
- Rückschlagventilcheck valve
- 41 =41 =
- Rückschlagventilcheck valve
- 43 =43 =
- Einfüllöffnungfill opening
- 45 =45 =
- Einfüllöffnungfill opening
- 47 =47 =
- Pumpenradimpeller
- 49 =49 =
- BuchseRifle
- 51 =51 =
- Raumroom
- 53 =53 =
- Raumroom
- 55 =55 =
- Raumroom
- 57 =57 =
- Querbohrungcross hole
- 59 =59 =
- Bohrungdrilling
- 61 =61 =
- Querbohrungcross hole
- 63 =63 =
- Gehäuseabschnitthousing section
- 65 =65 =
- Ölsumpfoil sump
- 67 =67 =
- Kühlrippecooling fin
- 69 =69 =
- Ringraumannulus
- 71 =71 =
- Trennwandpartition wall
- 73 =73 =
- Ringraumannulus
- 75 =75 =
- ZylinderlaufbuchseCylinder liner
- 77 =77 =
- Ringraumannulus
- 79 =79 =
- Leitblechbaffle
- 85 =85 =
- Gehäuseabschnitthousing section
- 87 =87 =
- Schraubescrew
- 89 =89 =
- Kolbenringpiston ring
Claims (6)
- Compressor (1) for the production of oil-free compressed air, comprising an motor driven by a drive shaft (3), provided with a swash plate (5) and lubricated by oil, which communicates by means of piston rods (13) with pistons (11) operating in alternation relative to an oil-cooled cylinder head (17), wherein the oil serving to cool the discharge side of the compressor is also used to lubricate the motor side with complete sealing from the compressed air, characterised by the following features:(a) the oil serving for cooling and lubrication is predetermined by an encapsulated permanent oil quantity delivered in circulation in the interior of the compressor housing;(b) the interior of the compressor is subdivided into a compression zone containing said cylinder head (17) and the piston array and into an motor zone containing said drive shaft (3) with said swash plate (5) by means of check valves (39, 41) opening in a direction of oil circulation; and(c) a pumping means (42) is provided that delivers the oil in correspondence with the direction of flow provided by said check valves in circulation between said compression zone and said motor zone.
- Compressor according to Claim 1, characterised by the following features:said compression zone of the compressor and said motor zone comprise each a separate charging opening (43; 45) for optional charging.
- Compressor according to Claim 1, characterised by the following features:said pumping means for the circulation of the oil is constituted by an impeller (47) that is fastened on the end of said drive shaft (3) in the interior of the compressor housing to cause the delivery of the oil in correspondence with the opening direction predetermined by said check valves (39; 41) between said compression zone and said motor zone.
- Compressor according to Claims 1 and 3, characterised by the following features:(a) said impeller (47) on the end of said drive shaft (3) rotates inside a bush (49) extending from a central housing section (23) of the compressor to said compression zone thereof, which bush encloses a space (53);(b) said space (53) is limited by a check valve (41) opening in the direction of said impeller (47) in opposition to said cylinder head;(c) the space (55) present on the discharge side of said impeller (47) communicates via transverse bores (57) and a bore (59) passing axially centrally through said drive shaft and closed at the head end and via transverse bores (61) radially branching off from said closed bore (59) with the interior of the housing section (63) receiving the oil pan (65);(d) said oil pan (65) communicates via at least one check valve (39) with a chamber (annular space 69) provided in the central housing section (23), which chamber is connected to the space of said compression zone, which surrounds the cylinder sleeves (75) of said pistons (11); and(e) said space surrounding said cylinder sleeves (annular space 73) is connected by connections in the region of said cylinder head to a space (51) that is separated by said check valve (41) from said space (53) receiving said impeller.
- Compressor according to any of the preceding Claims, characterised in that said housing of the compressor consists of several housing sections, a housing section (63) made of metal and including said motor (1), a central housing section (23) made of synthetic material and supporting the sleeves (21) of said piston rods and a housing section (85) made of synthetic material, which encloses said compression zone of the compressor and is limited on its end by said cylinder head.
- Compressor according to Claim 5, characterised in that said housing sections (23, 85) made of synthetic material are sandwiched between said housing section (63) made of metal and said cylinder head (17).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19847159 | 1998-10-13 | ||
| DE19847159A DE19847159C2 (en) | 1998-10-13 | 1998-10-13 | Compressor for generating oil-free compressed air |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0994252A2 EP0994252A2 (en) | 2000-04-19 |
| EP0994252A3 EP0994252A3 (en) | 2000-11-08 |
| EP0994252B1 true EP0994252B1 (en) | 2006-09-13 |
Family
ID=7884319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99119190A Expired - Lifetime EP0994252B1 (en) | 1998-10-13 | 1999-10-07 | Compressor for the production of oil free air |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6318502B1 (en) |
| EP (1) | EP0994252B1 (en) |
| DE (2) | DE19847159C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020112664A1 (en) | 2020-05-11 | 2021-11-11 | OET GmbH | Reciprocating compressor for generating oil-free compressed air |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004061224B4 (en) * | 2004-12-20 | 2010-09-09 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Piston-cylinder arrangement, in particular for a swash plate compressor |
| DE102004061233B3 (en) * | 2004-12-20 | 2006-07-13 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Dry running compressor, in particular swash plate compressor, with a piston rod storage |
| DE202006005682U1 (en) * | 2006-04-05 | 2006-06-14 | Lincoln Gmbh & Co. Kg | Lubricant or hydraulic pump |
| DE102008061897A1 (en) * | 2008-12-11 | 2010-06-17 | Pfeiffer Vacuum Gmbh | Vacuum pump |
| DE102009044930A1 (en) * | 2009-09-24 | 2011-04-07 | Ernst Beck | Pneumatic motor |
| US9856866B2 (en) | 2011-01-28 | 2018-01-02 | Wabtec Holding Corp. | Oil-free air compressor for rail vehicles |
| DE102014209892A1 (en) * | 2014-05-23 | 2015-11-26 | Mahle International Gmbh | axial piston |
| DE102014007931A1 (en) | 2014-05-27 | 2015-12-03 | Hubert Bellm | Small wind turbine |
| CN105201816B (en) * | 2015-09-07 | 2017-03-22 | 福州大学 | Self-cooling structure for cylinder of swashplate type plunger pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3458114A (en) * | 1967-03-13 | 1969-07-29 | Champion Pneumatic Machinery C | Compressor |
| US3557664A (en) * | 1968-07-16 | 1971-01-26 | Nissan Motor | Cylindrical reciprocating compressor of horizontal type for a car cooler of an automobile |
| US3750848A (en) * | 1970-10-15 | 1973-08-07 | Toyoda Kk | Apparatus for lubricating a rotary swash plate type compressor |
| US4070136A (en) * | 1973-05-11 | 1978-01-24 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Apparatus for lubricating a swash plate compressor |
| US3930758A (en) * | 1974-03-22 | 1976-01-06 | General Motors Corporation | Means for lubricating swash plate air conditioning compressor |
| JPH01142277A (en) * | 1987-11-30 | 1989-06-05 | Sanden Corp | Variable displacement compressor |
| JPH02230979A (en) * | 1989-03-02 | 1990-09-13 | Toyota Autom Loom Works Ltd | Swash plate type compressor |
| US4932841A (en) * | 1989-03-20 | 1990-06-12 | Thermo King Corporation | Combination oil pressure regulator and low oil pressure detector for refrigerant compressor |
| JP3082417B2 (en) * | 1991-09-18 | 2000-08-28 | 株式会社豊田自動織機製作所 | Variable displacement compressor |
| JP2510425Y2 (en) * | 1992-01-29 | 1996-09-11 | サンデン株式会社 | Lubrication structure of compressor main shaft bearing |
| DE4481042C2 (en) * | 1994-07-13 | 1999-02-11 | Toyoda Automatic Loom Works | Swash plate compressor with variable displacement |
| US5647266A (en) * | 1994-10-03 | 1997-07-15 | Dynex/Rivett, Inc. | Hold-down mechanism for hydraulic pump |
| JP3102292B2 (en) * | 1995-03-23 | 2000-10-23 | 株式会社豊田自動織機製作所 | Reciprocating piston compressor |
| JP3094841B2 (en) * | 1995-04-28 | 2000-10-03 | 株式会社豊田自動織機製作所 | Oil pump device for swash plate compressor |
| DE19527647A1 (en) * | 1995-07-28 | 1997-01-30 | Linde Ag | Axial piston machine |
| US5752809A (en) * | 1995-09-04 | 1998-05-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Variable displacement compressor |
| JPH09250452A (en) * | 1996-03-19 | 1997-09-22 | Toyota Autom Loom Works Ltd | Lubricating structure in compressor |
| JPH10169557A (en) * | 1996-12-06 | 1998-06-23 | Toyota Autom Loom Works Ltd | Compressor |
| DE19706066A1 (en) * | 1997-02-17 | 1997-11-20 | Hans Dipl Ing Unger | Compressor providing compressed air in vehicle |
| DE19833604A1 (en) * | 1997-07-29 | 1999-02-04 | Luk Fahrzeug Hydraulik | Compact compressor for air conditioning in vehicle |
| JP3860311B2 (en) * | 1997-10-21 | 2006-12-20 | カルソニックカンセイ株式会社 | Swash plate compressor |
-
1998
- 1998-10-13 DE DE19847159A patent/DE19847159C2/en not_active Expired - Fee Related
-
1999
- 1999-10-07 EP EP99119190A patent/EP0994252B1/en not_active Expired - Lifetime
- 1999-10-07 DE DE59913849T patent/DE59913849D1/en not_active Expired - Lifetime
- 1999-10-13 US US09/417,128 patent/US6318502B1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020112664A1 (en) | 2020-05-11 | 2021-11-11 | OET GmbH | Reciprocating compressor for generating oil-free compressed air |
| WO2021228598A1 (en) | 2020-05-11 | 2021-11-18 | OET GmbH | Reciprocating compressor for generating oil-free compressed air |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0994252A3 (en) | 2000-11-08 |
| US6318502B1 (en) | 2001-11-20 |
| DE19847159C2 (en) | 2001-12-06 |
| DE19847159A1 (en) | 2000-04-20 |
| EP0994252A2 (en) | 2000-04-19 |
| DE59913849D1 (en) | 2006-10-26 |
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