EP0394651B1 - Compressed air vane motor - Google Patents
Compressed air vane motor Download PDFInfo
- Publication number
- EP0394651B1 EP0394651B1 EP90104605A EP90104605A EP0394651B1 EP 0394651 B1 EP0394651 B1 EP 0394651B1 EP 90104605 A EP90104605 A EP 90104605A EP 90104605 A EP90104605 A EP 90104605A EP 0394651 B1 EP0394651 B1 EP 0394651B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressed air
- vane motor
- housing
- rotor
- motor according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
- F04C18/348—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the vanes positively engaging, with circumferential play, an outer rotatable member
Definitions
- the invention relates to a compressed air vane motor with a roller-mounted rotor which has receiving slots distributed around the circumference, in which fins are guided in a radially displaceable manner and whose outer sealing edges bear against the inner surface of a cylindrical outer casing by centrifugal force, the eccentric with respect to the rotor to reduce wear and friction offset outer jacket is rotatably guided in a housing and is carried by the friction between the fins and the outer jacket, the cylindrical outer jacket being rotatably supported in the housing by at least one air bearing and for this purpose being accommodated in an approximately circular-cylindrical guide bore in the housing with little radial play and in which the cylindrical outer jacket is guided at the end with little play between sealing surfaces running perpendicular to the axis of rotation, an air inlet duct and / or an air outlet duct opening into at least one of the sealing surfaces, in which At least one air pocket, preferably connected to the air inlet duct, is provided in the housing toward the outer jacket.
- the object of the present invention is to design a compressed air vane motor of the type mentioned in such a way that the compressed air vane motor has a long service life when using oil-free compressed air.
- the invention provides that the axial length of the air pocket corresponds to the axial length of the circumferential outer jacket.
- the production of the air pockets is particularly simple and efficient with little tool effort possible, since the outer shell can be processed over its entire length. No degrees of processing can occur at the jacket pocket ends.
- the entrainment of the air boundary layer in particular is considerably facilitated in that the transition between the air pocket and the guide bore is rounded in the circumferential direction is trained.
- a high efficiency of the air vane motor can be achieved with little wear and tear that the cylindrical outer jacket is guided at the end with little play between two sealing surfaces running perpendicular to the axis of rotation, with at least one of the sealing surfaces opening into an air inlet duct and / or an air outlet duct.
- the sealing surface on the drive shaft side can be designed to run all the way around with the rotor and, for this purpose, expediently be formed by a sealing disk fixedly arranged on the rotor.
- the sealing washer can have a collar which is braced on the face side with the inner ring of the drive-side roller bearing, so that a simple space-saving construction is achieved with simple, possibly automatic assembly.
- a simple, dimensionally accurate manufacture and assembly can be achieved in that the housing enclosing the rotor has a cylinder part which is held on the end face between two concentric bearing parts, these bearing parts axially guiding the rotor.
- the output-side bearing part can be a ring with a radially inwardly projecting flat part, one side of the flat part having the counter surface interacting with the sealing disk.
- the bearing part on the output shaft side can furthermore have an axial outer collar which is flush with the end face of the outer ring of the rolling bearing.
- the mode of operation of the air bearing can be improved in that the air pocket or the air pockets is connected to the air inlet duct, since at higher air pressures the boundary layers on the surfaces of the parts sliding against each other are thicker and more stable.
- the air pocket can be formed by a partially cylindrical surface which is eccentric with respect to the cylindrical guide bore and whose radius of curvature is smaller or at most equal to the radius of curvature of the guide bore.
- the preferred exemplary embodiment shown in the attached figures shows a compressed air vane motor with a rotor 1 which is rotatably mounted in bearing parts 3,3 'via roller bearings 2,2'.
- the rotor 1 is provided with four radial receiving slots 5, in which fins 6 are received in a radially displaceable manner.
- the fins 6 have a rectangular shape and they are pressed by the centrifugal force with their sealing edges 4 against the cylindrical inner surface 7 of a tubular outer jacket 8.
- This outer jacket 8 is rotatably offset from the axis of rotation 9 of the rotor 1 in a guide bore 10 of a housing 11.
- the housing 11 itself consists of a cylinder part 11 'to which the bearing parts 3, 3' are connected at the end with a continuous cylindrical outer surface 12.
- the rotor 1, which is rotatable about the axis of rotation 9, is connected to an output shaft 14, on which an inner ring 16 of the roller bearing 2 is connected to a sealing disk 17 via a clamping nut 15.
- the sealing disk 17 itself has a sealing surface 18 directed perpendicular to the axis of rotation 9, which bears against a shoulder 19 of the rotor 1.
- the sealing disk 17 is at least partially rotatable between a flat part 20 of the bearing part 3 and the cylinder part 11 'of the housing 11 added so that the rotor 1 is guided axially.
- the rotor 1 On the side opposite the output shaft 14, the rotor 1 is also provided with a radial shoulder 23 which interacts with a sealing surface 24 of the bearing part 3.
- the outer jacket 8 is rotatably guided between the sealing surfaces 18 and 24.
- an air inlet duct 25 is provided running in the axial direction and an air outlet duct 26 is provided approximately opposite one another over a further circumferential area, the rotor 1 being rotated in a manner known per se by the expanding and flowing through compressed air. Due to the centrifugal force, the fins 6 are pressed outwards against the inner surface 7 of the outer casing 8, and the outer casing 8 is rotated in its guide bore 10 by friction.
- the guide bore 10 is widened on one side by a partial cylindrical surface 27 and the intermediate space thus created serves as an air pocket 28 which is connected to the air inlet duct 25.
- air and, in particular, the boundary layer adhering to the surface of the outer casing 8 are entrained into the remaining rest of the guide bore 10, so that the air cushion thus formed results in a practically contact-free mounting of the outer casing 8, through which the rotor 1
- the resulting vibrations are dampened and smooth, wear-free running is achieved.
- the operation of the vane motor with oil-free compressed air is made possible almost without wear.
- the bearing part 3 'and the cylinder part 11' of the housing 11 are fixed in their mutual position against rotation by a pin 30 projecting into a slot 29.
- an extension 31 of the air inlet duct can be connected directly to the air pocket 28. This is not absolutely necessary for the functionality, but it is very beneficial. Due to the higher air pressure in the air pocket 28, the air storage is improved. At higher air pressure, more vibration-damping and "lubricating" molecules are available for storage.
Abstract
Description
Die Erfindung betrifft einen Druckluftlamellenmotor mit einem wälzgelagerten Rotor, der am Umfang verteilt Aufnahmeschlitze aufweist, in denen Lamellen radial verschiebbar geführt sind und deren äußere Dichtkanten an der Innenfläche eines zylindrischen Außenmantels durch die Fliehkraft anliegen, wobei zur Verschleiß- und Reibungsverminderung der exzentrisch gegenüber dem Rotor versetzte Außenmantel drehbar in einem Gehäuse geführt ist und durch die Reibung zwischen Lamellen und Außenmantel mitgenommen wird, wobei der zylindrische Außenmantel im Gehäuse durch mindestens ein Luftlager drehbar gelagert ist und dazu in einer etwa kreiszylindrischen Führungsbohrung des Gehäuses mit wenig radialem Spiel aufgenommen ist und bei dem der zylindrische Außenmantel stirnseitig mit geringem Spiel zwischen senkrecht zur Drehachse verlaufenden Dichtflächen geführt ist, wobei mindestens in einer der Dichtflächen ein Lufteintrittskanal und/oder ein Luftauslaßkanal mündet, wobei im Gehäuse zum Außenmantel hin geöffnet mindestens eine vorzugsweise mit dem Lufteintrittskanal verbundene Lufttasche vorgesehen ist.The invention relates to a compressed air vane motor with a roller-mounted rotor which has receiving slots distributed around the circumference, in which fins are guided in a radially displaceable manner and whose outer sealing edges bear against the inner surface of a cylindrical outer casing by centrifugal force, the eccentric with respect to the rotor to reduce wear and friction offset outer jacket is rotatably guided in a housing and is carried by the friction between the fins and the outer jacket, the cylindrical outer jacket being rotatably supported in the housing by at least one air bearing and for this purpose being accommodated in an approximately circular-cylindrical guide bore in the housing with little radial play and in which the cylindrical outer jacket is guided at the end with little play between sealing surfaces running perpendicular to the axis of rotation, an air inlet duct and / or an air outlet duct opening into at least one of the sealing surfaces, in which At least one air pocket, preferably connected to the air inlet duct, is provided in the housing toward the outer jacket.
Bei einem aus der EP 131 158 A3 bekannten solchen Druckluftmotor sind im Außenmantel kompliziert geformte Lufttaschen eingearbeitet. Die Herstellung ist sehr aufwendig.In such a compressed air motor known from EP 131 158 A3, complicatedly shaped air pockets are incorporated in the outer jacket. The production is very complex.
Beim aus der DE-PS 17 51 379 bekannten Druckluftlamellenmotor ist der Außenmantel über Wälzlager drehbar gelagert. Trotz dieser guten Lagerung und Führung tritt zwischen dem Außenmantel und den Lamellen wegen Mangelschmierung des Lagers ein relativ starker Verschleiß auf, so daß bei einem Betrieb mit ölfreier Druckluft nur eine geringe Lebensdauer des Lamellenmotors erreichbar ist.In the compressed air vane motor known from DE-PS 17 51 379, the outer jacket is rotatably supported by roller bearings. Despite this good storage and guidance, a relatively strong wear occurs between the outer casing and the fins due to insufficient lubrication of the bearing, so that only a short service life of the vane motor can be achieved when operating with oil-free compressed air.
Aufgabe der vorliegenden Erfindung ist es, einen Druckluftlamellenmotor der eingangs genannten Art so auszubilden, daß bei Verwendung ölfreier Druckluft der Druckluftlamellenmotor eine lange Lebensdauer aufweist.The object of the present invention is to design a compressed air vane motor of the type mentioned in such a way that the compressed air vane motor has a long service life when using oil-free compressed air.
Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß die axiale Länge der Lufttasche der axialen Länge des umlaufenden Außenmantels entspricht.To achieve this object, the invention provides that the axial length of the air pocket corresponds to the axial length of the circumferential outer jacket.
Dadurch daß sich die Lufttasche über die gesamte axiale Länge des umlaufenden Außenmantels erstreckt, ist die Herstellung der Lufttaschen besonders einfach und rationell mit geringem Werkzeugaufwand möglich, da der Außenmantel über seine ganze Länge bearbeitet werden kann. An den Manteltaschenenden können so keine Bearbeitungsgrade entstehen.Characterized in that the air pocket extends over the entire axial length of the circumferential outer shell, the production of the air pockets is particularly simple and efficient with little tool effort possible, since the outer shell can be processed over its entire length. No degrees of processing can occur at the jacket pocket ends.
Das Mitreißen insbesondere der Luftgrenzschicht wird dadurch wesentlich erleichtert, daß der Übergang zwischen der Lufttasche und der Führungsbohrung in Umfangsrichtung gerundet ausgebildet ist.The entrainment of the air boundary layer in particular is considerably facilitated in that the transition between the air pocket and the guide bore is rounded in the circumferential direction is trained.
Ein hoher Wirkungsgrad des Luftlamellenmotors kann dadurch bei geringem Verschleiß erreicht werden, daß der zylindrische Außenmantel stirnseitig mit geringem Spiel zwischen zwei senkrecht zur Drehachse verlaufenden Dichtflächen geführt ist, wobei mindestens in einer der Dichtflächen ein Lufteintrittskanal und/oder ein Luftaustrittskanal mündet. Zur weiteren Reibungsherabsetzung kann die antriebswellenseitige Dichtfläche zusammen mit dem Rotor umlaufend ausgebildet sein und dazu zweckmäßigerweise durch eine auf dem Rotor fest angeordnete Dichtscheibe gebildet sein.A high efficiency of the air vane motor can be achieved with little wear and tear that the cylindrical outer jacket is guided at the end with little play between two sealing surfaces running perpendicular to the axis of rotation, with at least one of the sealing surfaces opening into an air inlet duct and / or an air outlet duct. To further reduce the friction, the sealing surface on the drive shaft side can be designed to run all the way around with the rotor and, for this purpose, expediently be formed by a sealing disk fixedly arranged on the rotor.
Zur einfachen Montage und Gewichtseinsparung kann die Dichtscheibe an einem Absatz des Rotors mit einer Stirnfläche anliegen, wobei diese Stirnfläche teilweise als Dichtfläche dienen kann. Weiter kann gewichtssparend die der Dichtfläche gegenüberliegende Gegenfläche der Dichtscheibe Teil eines Axiallagers für den Rotor sein.For easy installation and weight saving, the Sealing washer on a shoulder of the rotor with an end face, which end face can partially serve as a sealing surface. Furthermore, the counter surface of the sealing disk opposite the sealing surface can be part of an axial bearing for the rotor to save weight.
Weiter kann die Dichtscheibe einen Bund aufweisen, der stirnseitig mit dem Innenring des antriebsseitigen Wälzlagers verspannt ist, so daß ein einfacher platzsparender Aufbau bei einfacher, ggf. automatischer Montage erreicht wird.Furthermore, the sealing washer can have a collar which is braced on the face side with the inner ring of the drive-side roller bearing, so that a simple space-saving construction is achieved with simple, possibly automatic assembly.
Eine einfache maßgenaue Fertigung und Montage kann dadurch erreicht werden, daß das den Rotor umschließende Gehäuse einen Zylinderteil aufweist, der stirnseitig zwischen zwei konzentrischen Lagerteilen gehalten ist, wobei diese Lagerteile den Rotor axial führen. Der abtriebsseitige Lagerteil kann ein Ring mit radial nach innen ragendem Flachteil sein, wobei eine Seite des Flachteils die mit der Dichtscheibe zusammenwirkende Gegenfläche aufweist. Der abtriebswellenseitige Lagerteil kann weiter einen axialen Außenbund aufweisen, der stirnseitig fluchtend am Außenring des Wälzlagers anliegt.A simple, dimensionally accurate manufacture and assembly can be achieved in that the housing enclosing the rotor has a cylinder part which is held on the end face between two concentric bearing parts, these bearing parts axially guiding the rotor. The output-side bearing part can be a ring with a radially inwardly projecting flat part, one side of the flat part having the counter surface interacting with the sealing disk. The bearing part on the output shaft side can furthermore have an axial outer collar which is flush with the end face of the outer ring of the rolling bearing.
Besondere Zentriermaßnahmen erübrigen sich, wenn das aus dem zylindrischen Teil und den zwei Lagerteilen bestehende zylindrische Gehäuse in einer Aufnahmebohrung des anzutreibenden Werkzeugs eingesetzt ist, insbesondere platz- und gewichtsparend im Handgriff des anzutreibenden Handwerkzeugs.Special centering measures are unnecessary if the cylindrical housing consisting of the cylindrical part and the two bearing parts is inserted in a receiving bore of the tool to be driven, especially and weight-saving in the handle of the hand tool to be driven.
Die Wirkungsweise des Luftlagers kann dadurch verbessert werden, daß die Lufttasche bzw. die Lufttaschen mit dem Lufteintrittskanal in Verbindung steht, da bei höherem Luftdruck die Grenzschichten an den Oberflächen der aneinander gleitenden Teile dicker und tragfähiger ist.The mode of operation of the air bearing can be improved in that the air pocket or the air pockets is connected to the air inlet duct, since at higher air pressures the boundary layers on the surfaces of the parts sliding against each other are thicker and more stable.
Herstellungsmäßig besonders vorteilhaft kann die Lufttasche durch eine gegenüber der zylindrischen Führungsbohrung exzentrische teilzylindrische Fläche gebildet sein, deren Krümmungsradius kleiner oder allenfalls gleich dem Krümmungsradius der Führungsbohrung ist.Particularly advantageously in terms of production, the air pocket can be formed by a partially cylindrical surface which is eccentric with respect to the cylindrical guide bore and whose radius of curvature is smaller or at most equal to the radius of curvature of the guide bore.
Weitere erfindungsgemäße Ausbildungen sind den Unteransprüchen zu entnehmen und werden mit ihren Vorteilen anhand der beigefügten Zeichnungen näher erläutert. Es zeigt:
- Figur 1
- einen Längsschnitt durch einen Druckluftlamellenmotor,
- Figur 2
- einen Querschnitt entlang der Linie II-II etwa in Rotormitte in größerem Maßstab,
Figur 3- einen der Figur 2 entsprechenden Schnitt bei anderer Rotorstellung und
Figur 4- einen Querschnitt entlang der Linie IV-IV der Figur 1 durch einen vom Lufteintrittskanal und Luftauslaßkanal durchdrungenen Lagerteil.
- Figure 1
- a longitudinal section through a compressed air vane motor,
- Figure 2
- a cross section along the line II-II approximately in the center of the rotor on a larger scale,
- Figure 3
- a section corresponding to Figure 2 with a different rotor position and
- Figure 4
- a cross section along the line IV-IV of Figure 1 by a bearing part penetrated by the air inlet duct and air outlet duct.
Das in den beigefügten Figuren dargestellte bevorzugte Ausführungsbeispiel zeigt einen Druckluftlamellenmotor mit einem Rotor 1, der über Wälzlager 2,2' in Lagerteilen 3,3' drehbar gelagert ist. Der Rotor 1 ist mit vier radialen Aufnahmeschlitzen 5 versehen, in denen radial verschiebbar Lamellen 6 aufgenommen sind. Die Lamellen 6 haben Rechteckform und sie werden durch die Fliehkraft mit ihren Dichtkanten 4 gegen die zylindrische Innenfläche 7 eines rohrförmigen Außenmantels 8 gedrückt. Dieser Außenmantel 8 ist gegenüber der Drehachse 9 des Rotors 1 exzentrisch versetzt in einer Führungsbohrung 10 eines Gehäuses 11 drehbar aufgenommen. Das Gehäuse 11 selbst besteht aus einem Zylinderteil 11', an dem stirnseitig die Lagerteile 3,3' sich mit durchgehender zylindrischer Außenfläche 12 anschließen.The preferred exemplary embodiment shown in the attached figures shows a compressed air vane motor with a rotor 1 which is rotatably mounted in bearing
Der um die Drehachse 9 drehbare Rotor 1 ist mit einer Abtriebswelle 14 verbunden, auf der über eine Spannmutter 15 ein Innenring 16 des Wälzlagers 2 mit einer Dichtscheibe 17 verbunden ist. Die Dichtscheibe 17 selbst weist eine senkrecht zur Drehachse 9 gerichtete Dichtfläche 18 auf, die an einem Absatz 19 des Rotors 1 anliegt. Die Dichtscheibe 17 ist mindestens teilweise zwischen einem Flachteil 20 des Lagerteils 3 und dem Zylinderteil 11' des Gehäuses 11 drehbar aufgenommen, so daß der Rotor 1 axial geführt ist.The rotor 1, which is rotatable about the axis of
Ein axialer Außenbund 21 des Lagerteils 3 liegt stirnseitig am Außenring 22 des Wälzlagers 2 an, wobei dieser Außenring 22 des Wälzlagers 2 fluchtend mit der Außenfläche 12 des Gehäuses 11 verläuft.An axial
Auf der der Abtriebswelle 14 gegenüberliegenden Seite ist der Rotor 1 ebenfalls mit einem radialen Absatz 23 versehen, der mit einer Dichtfläche 24 des Lagerteils 3 zusammenwirkt.On the side opposite the
Mit geringem axialem Spiel ist der Außenmantel 8 zwischen den Dichtflächen 18 und 24 drehbar geführt. Im Lagerteil 3' sind in axialer Richtung verlaufend ein Lufteintrittskanal 25 und etwa gegenüberliegend über einen weiteren Umfangsbereich ein Luftauslaßkanal 26 vorgesehen, wobei durch die sich ausdehnende und durchströmende Druckluft in an sich bekannter Weise der Rotor 1 in Umdrehung versetzt wird. Durch die Fliehkraft werden die Lamellen 6 nach außen gegen die Innenfläche 7 des Außenmantels 8 gepreßt, und es wird durch Reibung der Außenmantel 8 in seiner Führungsbohrung 10 mitgedreht.With little axial play, the
Im Ausführungsbeispiel ist einseitig die Führungsbohrung 10 durch eine Teilzylinderfläche 27 erweitert und der so entstehende Zwischenraum dient als Lufttasche 28, die mit dem Lufteintrittskanal 25 verbunden ist. Durch die Rotation des umlaufenden Außenmantels 8 wird aus der Lufttasche 28 Luft und insbesondere die an der Oberfläche des Außenmantels 8 haftende Grenzschicht in den verbleibenden Rest der Führungsbohrung 10 mitgerissen, so daß durch das so gebildete Luftpolster eine praktisch berührungsfreie Lagerung des Außenmantels 8 entsteht, durch die vom Rotor 1 entstehende Schwingungen abgedämpft und so ein ruhiger verschleißfreier Lauf erreicht wird. Der Betrieb des Lamellenmotors mit ölfreier Druckluft wird hierdurch nahezu verschleißfrei ermöglicht.In the exemplary embodiment, the
Der Lagerteil 3' und der Zylinderteil 11' des Gehäuses 11 sind durch einen in einen Schlitz 29 ragenden Stift 30 gegen Verdrehen in ihrer gegenseitigen Lage fixiert.The bearing part 3 'and the cylinder part 11' of the
Gemäß Figur 4 kann über eine Erweiterung 31 des Lufteintrittskanals dieser direkt in Verbindung mit der Lufttasche 28 stehen. Dies ist für die Funktionsweise nicht unbedingt erforderlich aber sehr förderlich. Durch den höheren Luftdruck in der Lufttasche 28 erfolgt eine Verbesserung der Luftlagerung. Beim höheren Luftdruck stehen für die Lagerung mehr schwingungsdämpfende und "schmierende" Moleküle zur Verfügung.According to FIG. 4, an
Claims (14)
- A compressed air vane motor having a rolling bearing-mounted rotor (1) which distributed at its periphery has receiving slots (5) in which vanes (6) are radially displaceably guided, the outer sealing edges (4) thereof bearing under the effect of centrifugal force against the inside surface (7) of a cylindrical outer casing (8), wherein to reduce wear and friction the outer casing (8) which is displaced eccentrically relative to the rotor (1) is guided rotatably in a housing (11) and is entrained by the friction between the vanes (6) and the outer casing (8), wherein the cylindrical outer casing (8) is rotatably mounted in the housing (11) by at least one air bearing and for that purpose is accommodated with little radial play in a substantially circular-cylindrical guide bore (10) in the housing (11), and in which the cylindrical outer casing (8) is guided at its ends with little play between sealing surfaces (18, 24) which extend perpendicularly to the axis of rotation (9), wherein an air intake duct (25) and/or an air outlet duct (26) opens at least in one of the sealing surfaces (24), and wherein provided in the housing (11) and open towards the outer casing (8) is at least one air pocket (28), which is preferably connected to the air intake duct (25), characterised in that the axial length of the air pocket (28) corresponds to the axial length of the rotating outer casing (8).
- A compressed air vane motor according to claim 1 characterised in that the transition between the air pocket (28) and the guide bore (10) is of a rounded configuration in the peripheral direction.
- A compressed air vane motor according to claim 1 or claim 2 characterised in that the air pocket (28) is formed by a part-cylindrical surface which is eccentric relative to the cylindrical guide bore (10) and that the radius of curvature thereof is smaller than or at most equal to the radius of curvature of the guide bore (10).
- A compressed air vane motor according to one of claims 1 to 3 characterised in that a plurality of air pockets (28) are provided distributed at the periphery of the cylindrical guide bore (10).
- A compressed air vane motor according to claim 1 characterised in that the sealing surface (18) at the output shaft end is designed to rotate together with the rotor (1).
- A compressed air vane motor according to claim 5 characterised in that the sealing surface (18) at the output shaft end is formed by a sealing disc (17) which is fixedly arranged on the rotor (1).
- A compressed air vane motor according to claim 6 characterised in that the sealing disc (17) lies against a step (19) of the rotor (1) with its face and that said face partially serves as a sealing surface (18).
- A compressed air vane motor according to claim 6 or claim 7 characterised in that the opposite face (18') which is in opposite relationship to the sealing surface (18) of the sealing disc (17) is part of a thrust bearing for the rotor (1).
- A compressed air vane motor according to one of claims 6 to 8 characterised in that the sealing disc (17) has a shoulder and that said shoulder is braced at its end against the inner race (16) of the rolling bearing (2) at the output shaft end.
- A compressed air vane motor according to claim 1 characterised in that the sealing surface (24) which is remote from the output shaft (14) is extended radially inwardly and serves as an axial abutment for a radial step (23) of the rotor (1).
- A compressed air vane motor according to one of claims 1 to 10 characterised in that the housing (11) which encloses the rotor (1) has a cylindrical portion (11') which is held at the ends between two concentric bearing members (3, 3') and that said bearing members (3, 3') axially guide the rotor (1).
- A compressed air vane motor according to claim 11 characterised in that the bearing member (3) at the output shaft end is a ring with a radially inwardly projecting flat portion (20), wherein one side of the flat portion (20) has a counterpart surface (18') co-operating with the sealing disc (18).
- A compressed air vane motor according to claim 11 or claim 12 characterised in that the bearing member (3) at the output shaft end has an axial outer shoulder (21) which bears at its end in aligned relationship against the outer race (22) of the rolling bearing (2).
- A compressed air vane motor according to claim 13 characterised in that the housing (11) comprising the cylindrical portion (11') and the two bearing members (3, 3') are fitted in a receiving bore in a tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90104605T ATE93009T1 (en) | 1989-04-27 | 1990-03-12 | AIR FIN MOTOR. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3913908A DE3913908A1 (en) | 1989-04-27 | 1989-04-27 | COMPRESSED AIR BLADE MOTOR |
| DE3913908 | 1989-04-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0394651A1 EP0394651A1 (en) | 1990-10-31 |
| EP0394651B1 true EP0394651B1 (en) | 1993-08-11 |
Family
ID=6379592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90104605A Expired - Lifetime EP0394651B1 (en) | 1989-04-27 | 1990-03-12 | Compressed air vane motor |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5064361A (en) |
| EP (1) | EP0394651B1 (en) |
| AT (1) | ATE93009T1 (en) |
| DE (2) | DE3913908A1 (en) |
| ES (1) | ES2041063T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7134856B2 (en) * | 2002-02-05 | 2006-11-14 | Kmb Feinmechanik Ag | Compressed air motor |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5142952A (en) * | 1990-05-21 | 1992-09-01 | Snap-On Tools Corporation | Ratchet tool |
| US5383771A (en) * | 1993-12-20 | 1995-01-24 | Snap-On Incorporated | Air motor with offset front and rear exhausts |
| US5664993A (en) * | 1995-10-31 | 1997-09-09 | Tmx Engineering & Manufacturing | Air bearing for a spin index fixture |
| USD408243S (en) * | 1998-02-23 | 1999-04-20 | S.P. Air Kabusiki Kaisha | Pneumatic hand tool |
| US7108493B2 (en) | 2002-03-27 | 2006-09-19 | Argo-Tech Corporation | Variable displacement pump having rotating cam ring |
| GB2383609B (en) * | 2001-10-18 | 2005-05-11 | George Robert Silk | Air motor |
| DE10310863B3 (en) * | 2003-03-11 | 2004-10-28 | Schmid & Wezel Gmbh & Co | sharpener |
| US20070166182A1 (en) * | 2006-01-19 | 2007-07-19 | Mighty Seven International Co., Ltd. | Pneumatic tool |
| WO2010083153A1 (en) * | 2009-01-13 | 2010-07-22 | Avl North America Inc. | Sliding vane rotary expander for waste heat recovery system |
| US8899390B2 (en) | 2012-02-14 | 2014-12-02 | C&D Zodiac, Inc. | Freewheeling rotary damping mechanism |
| CN103498727A (en) * | 2013-10-21 | 2014-01-08 | 宋振才 | Vane type engine |
| CN103883356B (en) * | 2013-12-16 | 2017-02-22 | 浙江大学 | Blade pneumatic motor |
| SG10201609481XA (en) * | 2016-11-11 | 2018-06-28 | Sanden Int Singapore Pte Ltd | A revolving vane compressor and method of operating and manufacturing the same |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1727718A (en) * | 1926-05-24 | 1929-09-10 | Owen D Kinsey | Grinder |
| DE491119C (en) * | 1928-05-26 | 1930-02-05 | Westfalia A G Maschf | Rotary piston compressor with sickle-shaped working space and radially displaceable pistons |
| US2918877A (en) * | 1954-07-02 | 1959-12-29 | Woodcock Francis Henry | Vane pumps |
| GB797528A (en) * | 1955-03-16 | 1958-07-02 | Nat Res Dev | Bearings for rotating shafts which are lubricated by gas |
| DE1751379C3 (en) * | 1967-05-22 | 1978-09-28 | Breinlich, Richard, Dr., 7120 Bietigheim | High pressure rotary piston machine |
| DE2621486A1 (en) * | 1976-05-14 | 1977-12-01 | Kaltenbach & Voigt | PNEUMATIC LAMINATE MOTOR |
| US4197061A (en) * | 1977-12-27 | 1980-04-08 | Boeing Commercial Airplane Company | Rotary pneumatic vane motor with rotatable tubing contacted by vanes |
| US4620837A (en) * | 1983-02-24 | 1986-11-04 | Nippon Piston Ring Co., Ltd. | Vane-type rotary compressor having a sleeve for rotation with vanes |
| JPS59192888A (en) * | 1983-04-14 | 1984-11-01 | Mazda Motor Corp | Rotary compressor equipped with rotary sleeve |
| JPS59229078A (en) * | 1983-06-09 | 1984-12-22 | Nippon Piston Ring Co Ltd | Rotary compressor |
| JPS61268892A (en) * | 1985-03-30 | 1986-11-28 | Nippon Piston Ring Co Ltd | Rotary compressor |
| JPS6435094A (en) * | 1988-07-15 | 1989-02-06 | Nippon Piston Ring Co Ltd | Rotary compressor |
-
1989
- 1989-04-27 DE DE3913908A patent/DE3913908A1/en not_active Ceased
-
1990
- 1990-03-12 EP EP90104605A patent/EP0394651B1/en not_active Expired - Lifetime
- 1990-03-12 ES ES199090104605T patent/ES2041063T3/en not_active Expired - Lifetime
- 1990-03-12 AT AT90104605T patent/ATE93009T1/en not_active IP Right Cessation
- 1990-03-12 DE DE9090104605T patent/DE59002250D1/en not_active Expired - Lifetime
- 1990-04-05 US US07/505,221 patent/US5064361A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7134856B2 (en) * | 2002-02-05 | 2006-11-14 | Kmb Feinmechanik Ag | Compressed air motor |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE93009T1 (en) | 1993-08-15 |
| US5064361A (en) | 1991-11-12 |
| DE3913908A1 (en) | 1990-10-31 |
| EP0394651A1 (en) | 1990-10-31 |
| ES2041063T3 (en) | 1993-11-01 |
| DE59002250D1 (en) | 1993-09-16 |
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