EP3194774A1 - Multi-stage piston compressor having an outer cooling air conduction system - Google Patents

Multi-stage piston compressor having an outer cooling air conduction system

Info

Publication number
EP3194774A1
EP3194774A1 EP15759703.0A EP15759703A EP3194774A1 EP 3194774 A1 EP3194774 A1 EP 3194774A1 EP 15759703 A EP15759703 A EP 15759703A EP 3194774 A1 EP3194774 A1 EP 3194774A1
Authority
EP
European Patent Office
Prior art keywords
unit
air
crankcase
air guide
compressor
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
EP15759703.0A
Other languages
German (de)
French (fr)
Other versions
EP3194774B1 (en
Inventor
Melanie BOCK
Matthias Fritz
Simon Froehlich
Armin Leberfinger
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.)
Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Schienenfahrzeuge 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 Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Publication of EP3194774A1 publication Critical patent/EP3194774A1/en
Application granted granted Critical
Publication of EP3194774B1 publication Critical patent/EP3194774B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • 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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/066—Cooling by ventilation
    • 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
    • F04B25/00—Multi-stage pumps
    • F04B25/005—Multi-stage pumps with two cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/005—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders with two cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
    • 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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/064—Cooling by a cooling jacket in the pump casing
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001—Noise damping
    • F04B53/002—Noise damping by encapsulation
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing

Definitions

  • the invention relates to a multi-stage piston compressor with a plurality of air-cooled cylinder compressor unit whose housed in a crankcase crankshaft is driven by a frontally flanged thereto engine unit, wherein on the opposite end of the compressor unit driven by the crankshaft and attached thereto radiator unit is arranged, the integrated Axial fan wheel blows the generated cooling air substantially outside along the compressor unit. Furthermore, the invention also relates to a rail vehicle with a compressed air system, in particular a pneumatic brake system comprising such a multi-stage piston compressor for compressed air generation.
  • the field of application of the invention extends primarily to rail vehicle construction.
  • Increasing environmental requirements with regard to pollutant emissions and noise protection are increasingly leading to the use of oil-free piston compressors in sound-proofed versions.
  • Compressors for rail vehicles which drive in residential areas or parked there and kept in readiness for operation, require an ever greater effort in the sound optimization of the units.
  • compressors in sound capsules there is the problem of sufficient cooling of the compressor unit, because sound insulation materials generally also have good heat-insulating properties. Cooling problems occur not only in such sound capsules, but also in installations in engine rooms or outdoor installations in the vicinity of heat sources, such as equipment fans.
  • DE 10 2010 024 346 A1 discloses a single-stage compressor unit in which the cooling air is generated by a radial fan which is attached to the drive side of the compressor unit between the latter and the motor unit.
  • the cooling air is moved in the compressor transverse direction and at the same time distributed over all the cylinders. This requires a corresponding component cost for the fairly nested cooling air flow.
  • one-stage or multi-stage reciprocating compressors emerge from the well-known state of the art, in which the cooling air is blown directly from an axial fan onto the cylinders of the compressor unit.
  • a positive guidance of the axially directed air flow along the cylinder is generated. Nevertheless, a large part of the cooling air of the axial fan is lost due to turbulence due to bounces on the cylinders.
  • the invention includes the technical teaching that for the outer cooling air duct in the region of the compressor unit at least one arcuate at least partially radially around the crankcase extending Vietnameseleitgephaseuse air inlet side to the radiator unit and the air outlet side on the crankcase of the compressor unit is mounted such that the axially directed air flow generated by the Axiallshareerrad at least partially received by the Heilleitgephaseuse and is at least partially passed around the crankcase in the radial direction to at least one air outlet side of the air guide arranged cylinder of the compressor unit to arrive.
  • the outer cooling air guide according to the invention receives the cooling air generated by the axial fan and directs it around the crankcase by preferably about 90 ° from the axial direction in a radial direction so that it finally flows out to a cylinder of the compressor unit.
  • the outer cooling air guide according to the invention connects directly to the radiator unit and passes on the air flow generated by the Axiallströmerrad on. Due to the curvature of the arcuate air guide housing, the air flow is deflected into a laminar flow for efficient cooling of a cooling ribbed air-cooled cylinder of the compressor unit.
  • the cylinder arranged on the air outlet side of the air guide housing is assigned to a high-pressure stage of the preferably multi-stage compressor unit.
  • the high-pressure stage of a multi-stage compressor unit is usually thermally loaded higher than the upstream low-pressure stage.
  • the high pressure stage is more sensitive to temperature in terms of component wear due to the higher pressure. Therefore, an efficient cooling of the high pressure stage is of particular importance, which is taken into account with the solution according to the invention. Inadequate cooling, on the other hand, can lead to increased component wear and thus to a shortening of the service life or premature compressor failure.
  • the improved cooling also allows the installation of the piston compressor according to the invention in so-called sound capsules, which provides a box-shaped receptacle for the reciprocating compressor and its attachments and is lined with a Schalldämmmaterial.
  • the sound radiation of the piston compressor is reduced and at the same time, thanks to the outer Cooling air duct, the temperatures at the compressor unit and the gas outlet temperatures compared to an unencapsulated arrangement not or only slightly increased or even lowered.
  • the invention is also suitable for installation in hot spots in a vehicle in which the supply of cold cooling air is deficient or generally for operation in hot climatic zones of the earth.
  • the Luftleitgezzause in the radial direction over a diverting angle of 90 ° to 360 ° around the crankcase of the compressor unit around.
  • the air guide housing extends about 90 ° around the crankcase.
  • the compressor unit is designed according to the design of a boxer and there are two oppositely arranged on the crankcase air baffles, each of which is assigned a cylinder for cooling.
  • the compressor unit comprises a total of three cylinders, of which two cylinders are associated with a low pressure stage and the other remaining cylinders are associated with a high pressure stage.
  • the cylinder of the high-pressure stage is preferably arranged adjacent to the radiator unit in the axial direction.
  • the cooling air guide can also include the adjacent cylinder of the low-pressure stage and also mittem this.
  • the air guide housing is designed so that the cooling air flow flows around the complete ribbed surfaces of the cylinder. Of particular importance here is the flow around the outer cooling ribs, that is, the cooling ribs close to the cylinder head.
  • the cooling air duct can also be used for the cooling of cylinders of single-stage compressors.
  • At least one fin extending radially in the direction of the crankcase is arranged in the radial direction for cooling air deflection in the interior of the air guide housing.
  • two fins which are situated at a distance from each other in the region of the cylinder to be cooled at the air guide arranged housing. The respective distal end of the fins can come to rest on the crankcase and thus define the distance between the crankcase and the air guide housing.
  • the preferably bent in the direction of flow fins are according to the preferred embodiment vertically in the region of the upper and lower boundary of the cylinder to be cooled.
  • the fins pick up the downward flow of cooling air and divert it horizontally to the cylinder.
  • the fins generate a dynamic pressure in front of the cylinder to be cooled, which increases the flow speed in the region of the cooling fins of the cylinder efficiency-increasing.
  • the air guide housing is designed on the air inlet side such that it taps the cooling air from the radiator unit over a radial range of 120 ° to 220 °, preferably 180 °. If - as described above - arranged in the context of a preferred embodiment, two opposing Dunleitgeophuse on the crankcase, it is preferably a tap over a radial range of 180 °. In this case Berstoffstoffgitterstoff can be omitted to cover the fan wheel, as this is completely enclosed by the two air ducts. Otherwise, appropriate Berquart protective grid means in the areas of the radiator unit to install, which are not protected against touch by Heilleitgephinuse.
  • the air guide this is designed as a metal sheet metal construction.
  • the arcuate housing shape can be generated by rounding or folding.
  • the air guide housing should be kept out of the places where elastic bearing elements are required to secure the piston compressor.
  • the air guide housing is designed in several parts, wherein individual housing parts are detachably connected to each other by a plug connection or by a screw connection. As a result, the mountability, accessibility and maintenance for the purpose of cooling fins cleaning is facilitated.
  • the Lucasleitge- housing may alternatively be at least partially cast from a light metal or the like.
  • FIG Figure 7 is a perspective view of an air guide according to an alternative embodiment.
  • the multi-stage piston compressor consists essentially of a compressor unit 1, at its first end face 2, a motor unit 3 is flanged in the form of an electric motor, whereas mounted on the opposite end face 4, a cooler unit 5.
  • the cooler unit 5 serves to cool the compressed air flow heated by compression within the compressor unit 1 by means of an axial fan wheel (not shown here) for generating the cooling air, which flows outside along the compressor unit 1.
  • an air guide housing 7 extending in an arc shape partially radially around the crankcase 6 is provided.
  • a crankshaft 8 rotatably mounted in the crankcase 6 drives
  • the axial fan 9 generates an air flow along the compressor unit 1 which is received through the air guide housing 7 over an angle of approximately 180 °, is conducted partially around the crankcase 6 in the radial direction and on the outlet side to a cylinder 10a of a high-pressure stage of the compressor unit 1 is guided to cool at least this cylinder 10a.
  • the cylinder 10a of the high-pressure stage of the compressor unit 1 has two cylinders 10b and 10c associated with an upstream low-pressure stage. Overall, the air-cooled cylinders 10a to 10c form a boxer arrangement.
  • the air guide housing 7 is fastened on the air inlet side via a radial region of approximately 180 ° to the cooler unit 5 by means of screws 11 (by way of example).
  • the air guide housing 7 is also attached on the part of the crankcase 6 via further screws 12 (exemplary).
  • a simple demountable Speed is the air duct 7 constructed in several parts and consists in this respect of a first housing part 7a and a second housing part 7b, which are here connected to each other via various screwed connections releasably.
  • the air guide housing 7 consists of bent and folded metal sheet metal sections in order to conduct the cooling air flow emanating from the radiator unit 5 on the air inlet side as low as possible to the cylinder 10a.
  • FIG. 4 shows the side of the crankcase 6 opposite FIG. 3, on which the second cylinder 10c of the low-pressure stage is arranged.
  • the air guide housing 7 shown here as a single component consists of the first housing part 7a and the second housing part 7b, which are detachably connected to one another by screwed connections. Through a recess 13 of the - not shown - cylinder 10a protrudes.
  • the two housing part 7b surrounds the cylinder 10a substantially U-shaped and in particular also below the inflow side, over an extended transverse section 14th
  • two fins 15a and 15b spaced apart from one another are arranged on the inside of the wall of the air guide housing 7, which are arranged on the air guide housing 7 in the region of the cylinder 10a to be cooled (not shown here).
  • the two fins 15a and 15b serve to deflect the cooling air flow from the axial direction in the radial direction to continue on to the cylinder 10a to be cooled.
  • the radial cooling air guidance taking place in this area takes on the form of the axial fan 9 (not shown) on one side of the compressor unit 1 and prevents a lateral outflow of the cooling air, which is thereby directed in the direction of the cylinders.
  • the tub geometry of the air guide housing 7 carries the cooling air through the transverse section 14 below the cylinder 10a to the lower edge of the adjacent cylinder 10b, which is hereby secondarily co-cooled.
  • the alternative embodiment of an air guide housing 7 'shown in FIG. 7 is an injection-molded plastic part on which the fins 15a' and 15b 'are directly formed. By the likewise formed transverse section 14 'cooling air is also below the - not shown here - cylinder out to the adjacent cylinder to cool this with.
  • the invention is not limited to the preferred embodiment described above. On the contrary, modifications are conceivable which are included within the scope of the following claims.
  • the cooling air guide is particularly suitable for the installation of the compact-built piston compressor described here within a box-shaped sound capsule, in order to realize sufficient cooling of the piston compressor despite the sound damping caused by the capsulation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention relates to a multi-stage piston compressor which comprises a compressor unit (1) having a plurality of air-cooled cylinders (10a-10c), the crankshaft (8) of said compressor unit being housed in a crankcase (6) and driving a motor unit (3) that is flange-mounted on an end face (2) on said compressor. On the opposing end face (4) of the compressor unit (1), a cooler unit (5) is arranged, mounted on said compressor unit and driven by the crankshaft (8), the integrated axial fan wheel (9) of said cooler unit blowing the generated cooling air substantially outwards along the compressor unit (1) and, in order to conduct cooling air externally in the region of said compressor unit (1), at least one air guide housing (7) which extends at least partially radially around the crankcase (6) in a curved manner being mounted on said cooler unit (5) on the air inlet side and being mounted on the compressor unit (1) crankcase (6) on the air outlet side such that the axial air flow which is generated by said axial fan wheel (9) is at least partially taken in by the air guide housing (7) and at least partially guided around the crankcase (6) in the radial direction so as to reach at least one cylinder (10a) arranged on the air outlet side of said air guide housing (7).

Description

Mehrstufiger Kolbenkompressor mit einer äußeren Kühlluftführung  Multi-stage piston compressor with an external cooling air duct
Die Erfindung betrifft einen mehrstufigen Kolbenkompressor mit einer mehrere luftgekühlte Zylinder umfassenden Verdichtereinheit, deren in einem Kurbelgehäuse untergebrachte Kurbelwelle von einer stirnseitig hieran angeflanschten Motoreinheit angetrieben wird, wobei an der gegenüberliegenden Stirnseite der Verdichtereinheit eine von der Kurbelwelle angetriebene und hieran angebrachte Kühlereinheit angeordnet ist, deren integriertes Axiallüfterrad die erzeugte Kühlluft im Wesentlichen außen entlang der Verdichtereinheit bläst. Ferner betrifft die Erfindung auch ein Schienenfahrzeug mit einem Druckluftsystem, insbesondere ein pneumatisches Bremssystem, welches einen derartigen mehrstufigen Kolbenkompressor zur Drucklufterzeugung umfasst. The invention relates to a multi-stage piston compressor with a plurality of air-cooled cylinder compressor unit whose housed in a crankcase crankshaft is driven by a frontally flanged thereto engine unit, wherein on the opposite end of the compressor unit driven by the crankshaft and attached thereto radiator unit is arranged, the integrated Axial fan wheel blows the generated cooling air substantially outside along the compressor unit. Furthermore, the invention also relates to a rail vehicle with a compressed air system, in particular a pneumatic brake system comprising such a multi-stage piston compressor for compressed air generation.
Das Einsatzgebiet der Erfindung erstreckt sich vornehmlich auf den Schienenfahrzeugbau. Steigende Umweltanforderungen bezüglich Schadstoffemission und Lärm- schütz führen vermehrt zum Einsatz von ölfreien Kolbenkompressoren in schallgekapselten Ausführungen. Kompressoren für Schienenfahrzeuge, welche in Wohngebieten fahren oder dort abgestellt und in Betriebsbereitschaft gehalten werden, erfordern einen immer höheren Aufwand bei der Schalloptimierung der Aggregate. Bei Kompressoren in Schallkapseln stellt sich andererseits das Problem einer hinreichen- den Kühlung der Verdichtereinheit, weil Schalldämmmaterialien in der Regel auch gute Wärmdämmeigenschaften besitzen. Kühlprobleme treten aber nicht allein in derartigen Schallkapseln auf, sondern auch bei Einbauten in Maschinenräumen oder bei Außeneinbauten in der Nähe von Wärmequellen, wie beispielsweise Gerätelüftern. Die DE 10 2010 024 346 AI offenbart eine einstufige Verdichtereinheit, bei welcher die Kühlluft durch einen Radiallüfter erzeugt wird, der an der Antriebsseite der Verdichtereinheit zwischen dieser und der Motoreinheit befestigt ist. Bei dieser techni- sehen Lösung wird die Kühlluft in Kompressorquerrichtung bewegt und gleichzeitig über alle Zylinder verteilt. Dies erfordert einen entsprechenden Bauteilaufwand für die recht verschachtelte Kühlluftführung. The field of application of the invention extends primarily to rail vehicle construction. Increasing environmental requirements with regard to pollutant emissions and noise protection are increasingly leading to the use of oil-free piston compressors in sound-proofed versions. Compressors for rail vehicles, which drive in residential areas or parked there and kept in readiness for operation, require an ever greater effort in the sound optimization of the units. In the case of compressors in sound capsules, on the other hand, there is the problem of sufficient cooling of the compressor unit, because sound insulation materials generally also have good heat-insulating properties. Cooling problems occur not only in such sound capsules, but also in installations in engine rooms or outdoor installations in the vicinity of heat sources, such as equipment fans. DE 10 2010 024 346 A1 discloses a single-stage compressor unit in which the cooling air is generated by a radial fan which is attached to the drive side of the compressor unit between the latter and the motor unit. In this technical solution, the cooling air is moved in the compressor transverse direction and at the same time distributed over all the cylinders. This requires a corresponding component cost for the fairly nested cooling air flow.
Aus dem allgemein bekannten Stand der Technik gehen darüber hinaus auch ein- oder mehrstufige Kolbenkompressoren hervor, bei denen die Kühlluft von einem Axiallüfter ausgehend direkt auf die Zylinder der Verdichtereinheit geblasen wird. Um zu verhindern, dass die Kühlluft radial abströmt, wird eine Zwangsführung des axial gerichteten Luftstroms entlang der Zylinder erzeugt. Dennoch geht ein großer Teil der Kühlluft des Axiallüfters durch Verwirbelungen aufgrund von Abprallungen an den Zylindern verloren. In addition, one-stage or multi-stage reciprocating compressors emerge from the well-known state of the art, in which the cooling air is blown directly from an axial fan onto the cylinders of the compressor unit. In order to prevent the cooling air from flowing radially, a positive guidance of the axially directed air flow along the cylinder is generated. Nevertheless, a large part of the cooling air of the axial fan is lost due to turbulence due to bounces on the cylinders.
Es ist daher die Aufgabe der vorliegenden Erfindung, eine äußere Kühlluftführung insbesondere für einen mehrstufigen Kolbenkompressor zu schaffen, welche mit geringem bauteiltechnischen Aufwand eine effiziente Kühlung der Zylinder der Ver- dichtereinheit ermöglicht. It is therefore the object of the present invention to provide an external cooling air duct, in particular for a multi-stage piston compressor, which enables efficient cooling of the cylinders of the compressor unit with little technical complexity.
Die Aufgabe wird ausgehend von einem Kolbenkompressor gemäß dem Oberbegriff von Anspruch 1 in Verbindung mit dessen kennzeichnenden Merkmalen gelöst. Die nachfolgenden abhängigen Ansprüche geben vorteilhafte Weiterbildungen der Erfin- dung wieder. The object is achieved on the basis of a reciprocating compressor according to the preamble of claim 1 in conjunction with its characterizing features. The following dependent claims give advantageous developments of the invention again.
Die Erfindung schließt die technische Lehre ein, dass zur äußeren Kühlluftführung im Bereich der Verdichtereinheit mindestens ein bogenförmig zumindest teilweise radial um das Kurbelgehäuse herum verlaufendes Luftleitgehäuse lufteingangsseitig an der Kühlereinheit und luftauslassseitig am Kurbelgehäuse der Verdichtereinheit derart angebracht ist, dass der vom Axiallüfterrad erzeugte axial gerichtete Luftstrom zumindest teilweise vom Luftleitgehäuse aufgenommen und in Radialrichtung zumindest teilweise um das Kurbelgehäuse herum geleitet wird, um an mindestens einen luftauslassseitig des Luftleitgehäuses angeordneten Zylinder der Verdichterein- heit zu gelangen. The invention includes the technical teaching that for the outer cooling air duct in the region of the compressor unit at least one arcuate at least partially radially around the crankcase extending Luftleitgehäuse air inlet side to the radiator unit and the air outlet side on the crankcase of the compressor unit is mounted such that the axially directed air flow generated by the Axiallüfterrad at least partially received by the Luftleitgehäuse and is at least partially passed around the crankcase in the radial direction to at least one air outlet side of the air guide arranged cylinder of the compressor unit to arrive.
Mit anderen Worten nimmt die erfindungsgemäße äußere Kühlluftführung die vom Axiallüfter erzeugte Kühlluft auf und lenkt diese um vorzugsweise circa 90° von der Axialrichtung in eine Radialrichtung um das Kurbelgehäuse herum, so dass diese schließlich an einen Zylinder der Verdichtereinheit ausströmt. Damit schließt die erfindungsgemäße äußere Kühlluftführung direkt an der Kühlereinheit an und leitet den durch das Axiallüfterrad erzeugten Luftstrom weiter. Durch die Krümmung des bogenförmigen Luftleitgehäuses wird der Luftstrom in eine laminare Strömung zur effizienten Kühlung eines mit Kühlrippen versehenden luftgekühlten Zylinders der Verdichtereinheit umgelenkt. Vorzugsweise ist der luftauslassseitig des Luftleitgehäuses angeordnete Zylinder einer Hochdruckstufe der vorzugsweise mehrstufigen Verdichtereinheit zugeordnet. Denn die Hochdruckstufe einer mehrstufigen Verdichtereinheit ist in der Regel thermisch höher belastet als die vorgeschaltete Niederdruckstufe. Außerdem ist die Hochdruckstufe aufgrund des höheren Drucks tempera- turempfindlicher in Bezug auf Bauteilverschleiß. Daher fällt einer effizienten Kühlung der Hochdruckstufe eine besondere Bedeutung zu, welcher mit der erfindungsgemäßen Lösung Rechnung getragen wird. Eine unzureichende Kühlung kann dagegen zu einem erhöhten Bauteilverschleiß und damit zu einer Verkürzung der Lebensdauer oder zu einem vorzeitigen Kompressorausfall führen. In other words, the outer cooling air guide according to the invention receives the cooling air generated by the axial fan and directs it around the crankcase by preferably about 90 ° from the axial direction in a radial direction so that it finally flows out to a cylinder of the compressor unit. Thus, the outer cooling air guide according to the invention connects directly to the radiator unit and passes on the air flow generated by the Axiallüfterrad on. Due to the curvature of the arcuate air guide housing, the air flow is deflected into a laminar flow for efficient cooling of a cooling ribbed air-cooled cylinder of the compressor unit. Preferably, the cylinder arranged on the air outlet side of the air guide housing is assigned to a high-pressure stage of the preferably multi-stage compressor unit. Because the high-pressure stage of a multi-stage compressor unit is usually thermally loaded higher than the upstream low-pressure stage. In addition, the high pressure stage is more sensitive to temperature in terms of component wear due to the higher pressure. Therefore, an efficient cooling of the high pressure stage is of particular importance, which is taken into account with the solution according to the invention. Inadequate cooling, on the other hand, can lead to increased component wear and thus to a shortening of the service life or premature compressor failure.
Die verbesserte Kühlung ermöglicht zudem den Einbau des erfindungsgemäßen Kolbenkompressors in sogenannte Schallkapseln, welche eine kastenförmige Aufnahme für den Kolbenkompressor und dessen Anbauteile bietet und mit einem Schalldämmmaterial ausgekleidet ist. Hierdurch wird die Schallabstrahlung des Kolben- kompressors reduziert und gleichzeitig werden dank der erfindungsgemäßen äußeren Kühlluftführung die Temperaturen an der Verdichtereinheit sowie die Gasaustrittstemperaturen gegenüber einer ungekapselten Anordnung nicht oder nur geringfügig erhöht oder sogar gesenkt. Die Erfindung ist daneben ebenso geeignet für den Einbau an heißen Stellen in einem Fahrzeug, bei denen die Zufuhr von kalter Kühlluft man- gelhaft ist oder allgemein für den Betrieb in heißen Klimazonen der Erde. The improved cooling also allows the installation of the piston compressor according to the invention in so-called sound capsules, which provides a box-shaped receptacle for the reciprocating compressor and its attachments and is lined with a Schalldämmmaterial. As a result, the sound radiation of the piston compressor is reduced and at the same time, thanks to the outer Cooling air duct, the temperatures at the compressor unit and the gas outlet temperatures compared to an unencapsulated arrangement not or only slightly increased or even lowered. In addition, the invention is also suitable for installation in hot spots in a vehicle in which the supply of cold cooling air is deficient or generally for operation in hot climatic zones of the earth.
Vorzugsweise kann das Luftleitgehäuse in Radialrichtung über einen Umleitwinkel von 90° bis 360° um das Kurbelgehäuse der Verdichtereinheit herum verlaufen. Bei einer bevorzugten Ausführungsform verläuft das Luftleitgehäuse in etwa 90° um das Kurbelgehäuse herum. Hierbei ist die Verdichtereinheit nach der Bauart eines Boxers ausgebildet und es werden zwei einander gegenüberliegend am Kurbelgehäuse angeordnete Luftleitbleche vorgesehen, denen jeweils ein Zylinder zur Kühlung zugeordnet ist. Gemäß einer bevorzugten Bauart umfasst die Verdichtereinheit insgesamt drei Zylinder, von denen zwei Zylinder einer Niederdruckstufe und der andere ver- bleibende Zylinder einer Hochdruckstufe zugeordnet sind. Der Zylinder der Hochdruckstufe ist vorzugsweise in Axialrichtung gesehen der Kühlereinheit benachbart angeordnet. Preferably, the Luftleitgehäuse in the radial direction over a diverting angle of 90 ° to 360 ° around the crankcase of the compressor unit around. In a preferred embodiment, the air guide housing extends about 90 ° around the crankcase. Here, the compressor unit is designed according to the design of a boxer and there are two oppositely arranged on the crankcase air baffles, each of which is assigned a cylinder for cooling. According to a preferred embodiment, the compressor unit comprises a total of three cylinders, of which two cylinders are associated with a low pressure stage and the other remaining cylinders are associated with a high pressure stage. The cylinder of the high-pressure stage is preferably arranged adjacent to the radiator unit in the axial direction.
Die Kühlluftführung kann jedoch auch den benachbarten Zylinder der Niederdruck- stufe mit umfassen und diesen ebenfalls mitkühlen. Das Luftleitgehäuse ist so ausgeführt, dass der Kühlluftstrom die komplette Rippenläge des Zylinders umströmt. Besonders bedeutsam ist hierbei die Umströmung der äußeren Kühlrippen, also der dem Zylinderkopf naheliegenden Kühlrippen. Die Kühlluftführung kann natürlich auch für die Kühlung von Zylindern einstufiger Kompressoren verwendet werden. However, the cooling air guide can also include the adjacent cylinder of the low-pressure stage and also mitkühlen this. The air guide housing is designed so that the cooling air flow flows around the complete ribbed surfaces of the cylinder. Of particular importance here is the flow around the outer cooling ribs, that is, the cooling ribs close to the cylinder head. Of course, the cooling air duct can also be used for the cooling of cylinders of single-stage compressors.
Gemäß einer die Erfindung verbessernden Maßnahme wird vorgeschlagen, dass wandinnenseitig des Luftleitgehäuses mindestens eine sich in Richtung Kurbelgehäuse radial erstreckende Finne zur Kühlluftumlenkung in Radialrichtung angeordnet ist. Gemäß einer bevorzugten Ausführungsform werden zwei einander beabstandet gegenüberliegende Finnen im Bereich von dem zu kühlenden Zylinder am Luftleit- gehäuse angeordnet. Das jeweils distale Ende der Finnen kann dabei am Kurbelgehäuse zur Anlage kommen und somit den Abstand zwischen Kurbelgehäuse und Luftleitgehäuse definieren. Die vorzugsweise in Strömungsrichtung gebogenen Finnen liegen gemäß der bevorzugten Ausführungsform vertikal im Bereich der oberen und unteren Begrenzung des zu kühlenden Zylinders. Die Finnen nehmen die nach schräg unten gerichtete Kühlluftströmung auf und leiten diese horizontal zum Zylinder um. Zudem erzeugen die Finnen einen Staudruck vor dem zu kühlenden Zylinder, der die Strömungsgeschwindigkeit im Bereich der Kühlrippen des Zylinders effizienzsteigernd erhöht. According to a measure improving the invention, it is proposed that at least one fin extending radially in the direction of the crankcase is arranged in the radial direction for cooling air deflection in the interior of the air guide housing. According to a preferred embodiment, two fins which are situated at a distance from each other in the region of the cylinder to be cooled at the air guide arranged housing. The respective distal end of the fins can come to rest on the crankcase and thus define the distance between the crankcase and the air guide housing. The preferably bent in the direction of flow fins are according to the preferred embodiment vertically in the region of the upper and lower boundary of the cylinder to be cooled. The fins pick up the downward flow of cooling air and divert it horizontally to the cylinder. In addition, the fins generate a dynamic pressure in front of the cylinder to be cooled, which increases the flow speed in the region of the cooling fins of the cylinder efficiency-increasing.
Gemäß einer bevorzugten Ausführungsform ist das Luftleitgehäuse lufteinlassseitig derart gestaltet, dass dieses über einen radialen Bereich von 120° bis 220°, vorzugsweise 180°, die Kühlluft von der Kühlereinheit abgreift. Werden - wie vorstehend beschrieben - im Rahmen einer bevorzugten Ausführungsform zwei einander gegen- überliegende Luftleitgehäuse am Kurbelgehäuse angeordnet, so erfolgt vorzugsweise ein Abgriff über einen radialen Bereich von 180°. In diesem Falle können Berührschutzgittermittel zur Abdeckung des Lüfterrades entfallen, da dieses von den beiden Luftleitgehäusen vollständig umschlossen wird. Anderenfalls sind entsprechende Berühr schutzgittermittel in den Bereichen der Kühlereinheit anzubringen, welche nicht vom Luftleitgehäuse berührgesichert geschützt sind. According to a preferred embodiment, the air guide housing is designed on the air inlet side such that it taps the cooling air from the radiator unit over a radial range of 120 ° to 220 °, preferably 180 °. If - as described above - arranged in the context of a preferred embodiment, two opposing Luftleitgehäuse on the crankcase, it is preferably a tap over a radial range of 180 °. In this case Berührschutzgittermittel can be omitted to cover the fan wheel, as this is completely enclosed by the two air ducts. Otherwise, appropriate Berühr protective grid means in the areas of the radiator unit to install, which are not protected against touch by Luftleitgehäuse.
Gemäß einer bevorzugten Ausführungsform des Luftleitgehäuses ist dieses als eine Blechkonstruktion aus Metall ausgeführt. Hierbei kann die bogenförmige Gehäuseform durch Abrunden oder Abkanten erzeugt werden. Das Luftleitgehäuse ist an den Stellen auszusparen, an denen elastische Lagerungselemente zur Befestigung des Kolbenkompressors erforderlich sind. Gemäß einer bevorzugten Ausführungsform ist das Luftleitgehäuse mehrteilig ausgeführt, wobei einzelne Gehäuseteile durch eine Steckverbindung oder durch eine Verschraubung lösbar miteinander verbunden sind. Hierdurch wird die Montierbarkeit, Zugänglichkeit und Wartung zum Zwecke der Kühlrippenreinigung erleichtert. Es ist jedoch auch denkbar, das Luftleitgehäuse einstückig auszubilden, vorzugsweise aus einem spritzgegossenen Kunststoff. Hierbei lassen sich die der Luftleitung dienenden Finnen in fertigungstechnisch einfacher Weise anformen. Das Luftleitge- häuse kann alternativ hierzu zumindest teilweise auch aus einem Leichtmetall oder dergleichen gegossen werden. According to a preferred embodiment of the air guide this is designed as a metal sheet metal construction. Here, the arcuate housing shape can be generated by rounding or folding. The air guide housing should be kept out of the places where elastic bearing elements are required to secure the piston compressor. According to a preferred embodiment, the air guide housing is designed in several parts, wherein individual housing parts are detachably connected to each other by a plug connection or by a screw connection. As a result, the mountability, accessibility and maintenance for the purpose of cooling fins cleaning is facilitated. However, it is also conceivable to form the air guide housing in one piece, preferably from an injection-molded plastic. In this case, the fins serving the air line can be formed in a simple manufacturing technology. The Luftleitge- housing may alternatively be at least partially cast from a light metal or the like.
Weitere die Erfindung verbessernde Maßnahmen werden nachstehend gemeinsam mit der Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung anhand der Figuren näher dargestellt. Es zeigen: Further measures improving the invention will be described in more detail below together with the description of a preferred embodiment of the invention with reference to FIGS. Show it:
eine perspektivische Ansicht eines mehrstufigen Kolbenkompressors mit äußerer Kühlluftführung, eine perspektivische Ansicht der Verdichtereinheit mit Kühlereinheit des Kolbenkompressors, eine perspektivische Ansicht der Verdichtereinheit mit Kühlereinheit des Kolbenkompressors in einer anderen Blickrichtung als Figur 2, eine perspektivische Ansicht der Verdichtereinheit mit Kühlereinheit des Kolbenkompressors in einer anderen Blickrichtung als Figur 3, eine perspektivische Ansicht eines Luftleitgehäuses in einer ersten Blickrichtung, eine perspektivische Ansicht eines Luftleitgehäuses in einer zweiten Blickrichtung, und Figur 7 eine perspektivische Ansicht eines Luftleitgehäuses gemäß einer alternativen Ausführungsform. a perspective view of a multistage piston compressor with external cooling air duct, a perspective view of the compressor unit with radiator unit of the reciprocating compressor, a perspective view of the compressor unit with radiator unit of the reciprocating compressor in a different viewing direction than Figure 2, a perspective view of the compressor unit with radiator unit of the reciprocating compressor in another viewing direction 3 shows a perspective view of an air guide housing in a first viewing direction, a perspective view of an air guide housing in a second viewing direction, and FIG Figure 7 is a perspective view of an air guide according to an alternative embodiment.
Gemäß Figur 1 besteht der mehrstufige Kolbenkompressor im Wesentlichen aus einer Verdichtereinheit 1, an dessen ersten Stirnseite 2 eine Motoreinheit 3 in Form eines Elektromotors angeflanscht ist, wogegen an der gegenüberliegenden Stirnseite 4 eine Kühlereinheit 5 angebracht. Die Kühlereinheit 5 dient zur Kühlung des durch Kompression innerhalb der Verdichtereinheit 1 erhitzten Druckluftstroms mittels eines - hier nicht erkennbaren - Axiallüfterrades zur Erzeugung der Kühlluft, die außen entlang der Verdichtereinheit 1 strömt. Zur äußeren Kühlluftführung im Bereich der Verdichtereinheit 1 ist ein bogenförmig teilweise radial um das Kurbelgehäuse 6 herum verlaufendes Luftleitgehäuse 7 vorgesehen. Gemäß Figur 2 treibt eine im Kurbelgehäuse 6 drehbar gelagerte Kurbelwelle 8According to Figure 1, the multi-stage piston compressor consists essentially of a compressor unit 1, at its first end face 2, a motor unit 3 is flanged in the form of an electric motor, whereas mounted on the opposite end face 4, a cooler unit 5. The cooler unit 5 serves to cool the compressed air flow heated by compression within the compressor unit 1 by means of an axial fan wheel (not shown here) for generating the cooling air, which flows outside along the compressor unit 1. For the outer cooling air guide in the area of the compressor unit 1, an air guide housing 7 extending in an arc shape partially radially around the crankcase 6 is provided. According to FIG. 2, a crankshaft 8 rotatably mounted in the crankcase 6 drives
(welche hier bei demontierter Motoreinheit erkennbar ist) ein schematisch durch verdeckte Körperlinien dargestelltes Axiallüfterrad 9 der Kühlereinheit 5 an. Das Axiallüfterrad 9 erzeugt einen Luftstrom entlang der Verdichtereinheit 1, welcher über einen Winkel von circa 180° durch das Luftleitgehäuse 7 aufgenommen wird, in Ra- dialrichtung teilweise um das Kurbelgehäuse 6 herum geleitet wird und luftauslass- seitig zu einem Zylinder 10a einer Hochdruckstufe der Verdichtereinheit 1 geführt wird, um zumindest diesen Zylinder 10a zu kühlen. Dem Zylinder 10a der Hochdruckstufe der Verdichtereinheit 1 sind zwei Zylinder 10b sowie 10c einer vorgeschalteten Niederdruckstufe zugeordnet. Insgesamt bilden die luftgekühlten Zylinder 10a bis 10c eine Boxeranordnung. (Which is recognizable here with disassembled motor unit) to a schematically represented by hidden lines of the body axial fan 9 of the cooler unit 5 at. The axial fan 9 generates an air flow along the compressor unit 1 which is received through the air guide housing 7 over an angle of approximately 180 °, is conducted partially around the crankcase 6 in the radial direction and on the outlet side to a cylinder 10a of a high-pressure stage of the compressor unit 1 is guided to cool at least this cylinder 10a. The cylinder 10a of the high-pressure stage of the compressor unit 1 has two cylinders 10b and 10c associated with an upstream low-pressure stage. Overall, the air-cooled cylinders 10a to 10c form a boxer arrangement.
Nach Figur 3 ist das Luftleitgehäuse 7 lufteingangsseitig über einen radialen Bereich von circa 180° an der Kühlereinheit 5 per Schrauben 11 (exemplarisch) befestigt. Das Luftleitgehäuse 7 ist darüber hinaus seitens des Kurbelgehäuses 6 über weitere Schrauben 12 (exemplarisch) befestigt. Zum Zwecke einer einfachen Demontierbar- keit ist das Luftleitgehäuse 7 mehrteilig aufgebaut und besteht insoweit aus einem ersten Gehäuseteil 7a und einem zweiten Gehäuseteil 7b, die hier über diverse Ver- schraubungen miteinander lösbar verbunden sind. Das Luftleitgehäuse 7 besteht aus gebogenen sowie abgekanteten Blechabschnitten aus Metall, um den lufteinlassseitig von der Kühlereinheit 5 ausgehenden Kühlluftstrom möglichst verlustarm zu dem Zylinder 10a zu leiten. According to FIG. 3, the air guide housing 7 is fastened on the air inlet side via a radial region of approximately 180 ° to the cooler unit 5 by means of screws 11 (by way of example). The air guide housing 7 is also attached on the part of the crankcase 6 via further screws 12 (exemplary). For the purpose of a simple demountable Speed is the air duct 7 constructed in several parts and consists in this respect of a first housing part 7a and a second housing part 7b, which are here connected to each other via various screwed connections releasably. The air guide housing 7 consists of bent and folded metal sheet metal sections in order to conduct the cooling air flow emanating from the radiator unit 5 on the air inlet side as low as possible to the cylinder 10a.
In der Figur 4 ist die zur Figur 3 gegenüberliegende Seite des Kurbelgehäuses 6 erkennbar, auf welcher der zweite Zylinder 10c der Niederdruckstufe angeordnet ist. FIG. 4 shows the side of the crankcase 6 opposite FIG. 3, on which the second cylinder 10c of the low-pressure stage is arranged.
Gemäß Figur 5 besteht das hier als Einzelbauteil dargestellte Luftleitgehäuse 7 aus dem ersten Gehäuseteil 7a und dem zweiten Gehäuseteil 7b, welche durch Ver- schraubungen miteinander lösbar verbunden sind. Durch eine Ausnehmung 13 ragt der - nicht weiter dargestellte - Zylinder 10a hervor. Das zweie Gehäuseteil 7b um- fasst den Zylinder 10a im Wesentlichen U- förmig und insbesondere auch unterhalb der Anströmseite, über einen verlängerten Querabschnitt 14. According to FIG. 5, the air guide housing 7 shown here as a single component consists of the first housing part 7a and the second housing part 7b, which are detachably connected to one another by screwed connections. Through a recess 13 of the - not shown - cylinder 10a protrudes. The two housing part 7b surrounds the cylinder 10a substantially U-shaped and in particular also below the inflow side, over an extended transverse section 14th
In der Figur 6 sind wandinnenseitig des Luftleitgehäuses 7 zwei einander beabstandet gegenüberliegende Finnen 15a und 15b angeordnet, welche im Bereich des zu küh- lenden - hier nicht weiter dargestellten - Zylinder 10a am Luftleitgehäuse 7 angeordnet sind. Die beiden Finnen 15a und 15b dienen der Umlenkung des Kühlluftstroms von der Axialrichtung in die radiale Richtung zur Weiterführung an den zu kühlenden Zylinder 10a. Die in diesem Bereich stattfindende radiale Kühlluftführung nimmt die Form des - nicht weiter dargestellten - Axiallüfters 9 auf einer Seite der Verdichtereinheit 1 auf und verhindert ein seitliches Abströmen der Kühlluft, welche hierdurch in Richtung zu den Zylindern gelenkt wird. Die Wannengeometrie des Luftleitgehäuses 7 führt die Kühlluft durch den Querabschnitt 14 unterhalb des Zylinders 10a bis hin zur unteren Kante des benachbarten Zylinders 10b, welcher hierdurch sekundär mitgekühlt wird. Bei der in Figur 7 dargestellten alternativen Ausführungsform eines Luftleitgehäuses 7' handelt es sich um ein spritzgegossenes Kunststoffteil, an dem die Finnen 15a' und 15b' direkt angeformt sind. Durch den ebenfalls angeformten Querabschnitt 14' wird Kühlluft auch unterhalb des - hier nicht weiter dargestellten - Zylinders bis hin zum benachbarten Zylinder geführt, um auch diesen mit zu kühlen. In FIG. 6, two fins 15a and 15b spaced apart from one another are arranged on the inside of the wall of the air guide housing 7, which are arranged on the air guide housing 7 in the region of the cylinder 10a to be cooled (not shown here). The two fins 15a and 15b serve to deflect the cooling air flow from the axial direction in the radial direction to continue on to the cylinder 10a to be cooled. The radial cooling air guidance taking place in this area takes on the form of the axial fan 9 (not shown) on one side of the compressor unit 1 and prevents a lateral outflow of the cooling air, which is thereby directed in the direction of the cylinders. The tub geometry of the air guide housing 7 carries the cooling air through the transverse section 14 below the cylinder 10a to the lower edge of the adjacent cylinder 10b, which is hereby secondarily co-cooled. The alternative embodiment of an air guide housing 7 'shown in FIG. 7 is an injection-molded plastic part on which the fins 15a' and 15b 'are directly formed. By the likewise formed transverse section 14 'cooling air is also below the - not shown here - cylinder out to the adjacent cylinder to cool this with.
Die Erfindung ist nicht beschränkt auf das vorstehend beschriebene bevorzugte Ausführungsbeispiel. Es sind vielmehr auch Abwandlungen hiervon denkbar, welche vom Schutzbereich der nachfolgenden Ansprüche mit umfasst sind. So ist es beispielsweise auch möglich, eine einzylindrige Verdichtereinheit mit der erfindungsgemäßen äußeren Kühlluftführung auszustatten. Die Kühlluftführung eignet sich insbesondere zum Verbau des hier beschriebenen kompaktbauenden Kolbenkompressors innerhalb einer kastenförmigen Schallkapsel, um trotz der durch die Kaps- lung bewirkte Schalldämpfung eine ausreichende Kühlung des Kolbenkompressors zu verwirklichen. The invention is not limited to the preferred embodiment described above. On the contrary, modifications are conceivable which are included within the scope of the following claims. For example, it is also possible to equip a single-cylinder compressor unit with the outer cooling air guide according to the invention. The cooling air guide is particularly suitable for the installation of the compact-built piston compressor described here within a box-shaped sound capsule, in order to realize sufficient cooling of the piston compressor despite the sound damping caused by the capsulation.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Verdichtereinheit1 compressor unit
2 erste Stirnseite2 first face
3 Motoreinheit3 motor unit
4 zweite Stirnseite4 second front side
5 Kühlereinheit5 cooler unit
6 Kurbelgehäuse6 crankcase
7 Luftleitgehäuse7 air guide housing
8 Kurbelwelle8 crankshaft
9 Axiallüfterrad9 Axial fan
10 Zylinder 10 cylinders
11 Schraube  11 screw
12 Schraube  12 screw
13 Ausnehmung 13 recess
14 Querabschnitt14 cross section
15 Finne 15 fin

Claims

A n s p r ü c h e Claims
1. Mehrstufiger Kolbenkompressor mit einer mehrere luftgekühlte Zylinder (10a- 10c) umfassenden Verdichtereinheit (1), deren in einem Kurbelgehäuse (6) un- tergebrachte Kurbelwelle (8) eine an einer Stirnseite (2) hieran angeflanschte Motoreinheit (3) antreibt, wobei an der gegenüberliegenden Stirnseite (4) der Verdichtereinheit (1) eine von der Kurbelwelle (8) angetriebene und hieran angebrachte Kühlereinheit (5) angeordnet ist, deren integriertes Axiallüfterrad (9) die erzeugte Kühlluft im wesentlichen außen entlang der Verdichtereinheit (1) bläst, 1. Multi-stage piston compressor with a plurality of air-cooled cylinder (10a-10c) comprehensive compressor unit (1), in a crankcase (6) housed crankshaft (8) on a front side (2) flanged thereto engine unit (3) drives, wherein on the opposite end face (4) of the compressor unit (1), a cooling unit (5) driven by the crankshaft (8) and mounted thereon, the integrated axial fan wheel (9) blowing the generated cooling air substantially outwards along the compressor unit (1),
dadurch gekennzeichnet, dass zur äußeren Kühlluftführung im Bereich der Verdichtereinheit (1) mindestens ein bogenförmig zumindest teilweise radial um das Kurbelgehäuse (6) herum verlaufendes Luftleitgehäuse (7) lufteingangsseitig an der Kühlereinheit (5) und luftauslassseitig am Kurbelgehäuse (6) der Verdichtereinheit (1) derart angebracht ist, dass der vom Axiallüfterrad (9) erzeugte axiale Luftstrom zumindest teilweise vom Luftleitgehäuse (7) aufgenommen und in Radialrichtung zumindest teilweise um das Kurbelgehäuse (6) herum geleitet wird, um an mindestens einen luftauslassseitig des Luftleitgehäuses (7) angeordneten Zylinder (10a) zu gelangen. characterized in that the outer cooling air guide in the region of the compressor unit (1) at least one arcuate at least partially radially around the crankcase (6) extending around Luftleitgehäuse (7) air inlet side on the radiator unit (5) and the air outlet side on the crankcase (6) of the compressor unit (1 ) is mounted such that the axial air flow generated by the Axiallüfterrad (9) is at least partially received by the Luftleitgehäuse (7) and in the radial direction at least partially around the crankcase (6) around to at least one luftauslassseitig the air guide (7) arranged cylinder (10a) to arrive.
2. Mehrstufiger Kolbenkompressor nach Anspruch 1, 2. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass der luftauslassseitig des Luftleitgehäuses (7) angeordneten Zylinder (10a) einer Hochdruckstufe der Verdichtereinheit (1) zugeordnet ist. characterized in that the air outlet side of the air guide housing (7) arranged cylinder (10a) is associated with a high-pressure stage of the compressor unit (1).
3. Mehrstufiger Kolbenkompressor nach Anspruch 1, 3. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass das Luftleitgehäuse (7) in Radialrichtung über einen Umleitwinkel von 90° bis 360° um das Kurbelgehäuse (6) der Verdichtereinheit (1) herum verläuft. characterized in that the Luftleitgehäuse (7) extends in the radial direction over a diverting angle of 90 ° to 360 ° to the crankcase (6) of the compressor unit (1) around.
4. Mehrstufiger Kolbenkompressor nach Anspruch 1, 4. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass wandinnenseitig des Luftleitgehäuses (7) mindestens eine sich in Richtung Kurbelgehäuse (6) radial erstreckende Finne (15a, 15b) zur Kühlluftumlenkung angeordnet ist. characterized in that at least one in the direction of the crankcase (6) radially extending fin (15a, 15b) is arranged for cooling air deflection inside the wall of the air guide housing (7).
5. Mehrstufiger Kolbenkompressor nach Anspruch 4, 5. Multi-stage reciprocating compressor according to claim 4,
dadurch gekennzeichnet, dass zwei einander beabstandet gegenüberliegende Finnen (15a, 15b) im Bereich vor dem zu kühlenden Zylinder (10a) am Luftleitgehäuse (7) angeordnet sind. characterized in that two spaced-apart opposed fins (15a, 15b) are arranged in the region in front of the cylinder to be cooled (10a) on the air guide housing (7).
6. Mehrstufiger Kolbenkompressor nach Anspruch 1, 6. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass das Luftleitgehäuse (7) lufteinlasseitig Kühlluft über einen radialen Bereich von 120° bis 220°, vorzugsweise 180°, von der Kühlereinheit (5) abgreift. characterized in that the air guide housing (7) on the air intake side cooling air over a radial range of 120 ° to 220 °, preferably 180 °, from the radiator unit (5) picks off.
7. Mehrstufiger Kolbenkompressor nach Anspruch 1, 7. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass das Luftleitgehäuse (7) als eine Blechkonstruktion aus Metall ausgebildet ist. characterized in that the air guide housing (7) is designed as a metal sheet metal construction.
8. Mehrstufiger Kolbenkompressor nach Anspruch 1, 8. Multistage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass das Luftleitgehäuse (7) mehrteilig ausgeführt ist, wobei einzelnen Gehäuseteile (7a, 7b) durch eine Steckverbindung oder durch eine Verschraubung lösbar miteinander verbunden sind. characterized in that the air guide housing (7) is designed in several parts, wherein individual housing parts (7a, 7b) are detachably connected to each other by a plug connection or by a screw connection.
9. Mehrstufiger Kolbenkompressor nach Anspruch 1, 9. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass benachbart zum Luftleitgehäuse (7) an der Kühlereinheit (5) Berühr schutzgittermittel zur Abdeckung des Axiallüfterrades (9) angeordnet sind. characterized in that adjacent to the Luftleitgehäuse (7) on the radiator unit (5) Berühr protective grid means for covering the Axiallüfterrades (9) are arranged.
10. Mehrstufiger Kolbenkompressor nach Anspruch 1, 10. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass zwei einander gegenüberliegend an dem Kurbelgehäuse (6) der Verdichtereinheit (1) angeordnete Luftleitbleche (7) vorgesehen sind, denen jeweils ein Zylinder (10a) zur Kühlung zugeordnet ist. characterized in that two opposite to each other on the crankcase (6) of the compressor unit (1) arranged air guide plates (7) are provided, each associated with a cylinder (10a) for cooling.
11. Mehrstufiger Kolbenkompressor nach Anspruch 1 , 11. Multi-stage reciprocating compressor according to claim 1,
dadurch gekennzeichnet, dass die Verdichtereinheit (1) insgesamt drei Zylinder (10a- 10c) umfasst, nach Bauart eines Boxers zueinander angeordnet sind. characterized in that the compressor unit (1) comprises a total of three cylinders (10a-10c) are arranged according to the design of a boxer to each other.
12. Schienenfahrzeug mit einem Druckluftsystem, umfassend einen mehrstufigen Kolbenkompressor nach einem der vorstehenden Ansprüche, der in einer kastenförmigen mit Schalldämmmaterial ausgekleideten Schallkapsel untergebracht ist. 12. A rail vehicle with a compressed air system, comprising a multi-stage piston compressor according to one of the preceding claims, which is housed in a box-shaped Schalldämmmaterial lined with sound capsule.
EP15759703.0A 2014-09-19 2015-08-27 Multi-stage piston compressor having an outer cooling air conduction system Active EP3194774B1 (en)

Applications Claiming Priority (2)

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DE102014113598.9A DE102014113598A1 (en) 2014-09-19 2014-09-19 Multi-stage piston compressor with an external cooling air duct
PCT/EP2015/069580 WO2016041757A1 (en) 2014-09-19 2015-08-27 Multi-stage piston compressor having an outer cooling air conduction system

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EP3194774A1 true EP3194774A1 (en) 2017-07-26
EP3194774B1 EP3194774B1 (en) 2019-10-30

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EP (1) EP3194774B1 (en)
KR (1) KR102345451B1 (en)
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KR102011708B1 (en) 2018-02-22 2019-08-19 유진기공산업주식회사 The pipeless air compressor

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CN107110136B (en) 2019-08-09
KR20170058404A (en) 2017-05-26
US10323629B2 (en) 2019-06-18
DE102014113598A1 (en) 2016-03-24
KR102345451B1 (en) 2021-12-29
EP3194774B1 (en) 2019-10-30
US20170184087A1 (en) 2017-06-29
WO2016041757A1 (en) 2016-03-24

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