EP0051760A1 - A pneumatically controlled compressor idling clutch having a valve arrangement - Google Patents

A pneumatically controlled compressor idling clutch having a valve arrangement Download PDF

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Publication number
EP0051760A1
EP0051760A1 EP81108403A EP81108403A EP0051760A1 EP 0051760 A1 EP0051760 A1 EP 0051760A1 EP 81108403 A EP81108403 A EP 81108403A EP 81108403 A EP81108403 A EP 81108403A EP 0051760 A1 EP0051760 A1 EP 0051760A1
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EP
European Patent Office
Prior art keywords
pressure
compressor
valve
connection
chamber
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Application number
EP81108403A
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German (de)
French (fr)
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EP0051760B1 (en
Inventor
Hans Unger
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Knorr Bremse AG
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Knorr Bremse AG
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Application filed by Knorr Bremse AG filed Critical Knorr Bremse AG
Priority to AT81108403T priority Critical patent/ATE5346T1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing

Definitions

  • the invention relates to a valve device according to the preamble of claim 1.
  • the pressure of the consumer supplied by the compressor is used to act as a shut-off pressure on sealingly displaceable actuating elements of a clutch when a certain value is reached, which actuators actuate the compressor with the output, ie with the drive or Crankshaft of the compressor connects.
  • the cut-off pressure is able to disengage such clutches, which consist, for example, of multi-plate clutches, so that the compressor comes to a standstill while the drive is still running, thereby avoiding unnecessary compressor operation.
  • the clutch is generally engaged automatically, with the aid of spring assemblies etc., in such a way that the drive connection between the drive and output of the compressor system is established and the compressor is closed again starts to run and starts up after a certain time.
  • This start of the com pressors occurs against considerable resistance, ie the piston of the compressor must be started against the pressure remaining in the pressure chamber of the compressor after switching off.
  • This start-up takes place against the back pressure of the compressor, which is why, due to the increased resistance torque, relatively large springs are required for the frictional connection of the clutch.
  • These strongly dimensioned springs lead to a comparatively large design of the coupling, which makes use in cramped conditions, such as in a motor vehicle or the like, difficult.
  • the object of the invention is to design a pneumatically controlled compressor shut-off clutch of the generic type in such a way that the compressor can be started up against a low starting resistance; in particular, it should be possible to keep the design of the coupling small.
  • the pressure chamber of the compressor is vented via a ventilation line which opens into the suction chamber of the compressor and is thus connected to the suction connection that is open to outside air. This type of venting is particularly beneficial as the normal one wise venting noises with open venting are largely eliminated.
  • Both the pressure regulator of the control device and the vent valve can be arranged in a structurally compact manner in a common housing which is connected with the interposition of a heat-insulating seal with the housing receiving the pressure outlet or the outlet port of the compressor. It is thus possible to detach the control valve device comprising the vent valve and the pressure regulator from the compressor or the pressure port of the same.
  • the pressure regulator of the control valve device is preferably provided with an adjusting screw in order to thereby determine both the cut-off pressure for the clutch of the compressor and the point in time at which the pressure chamber is vented.
  • FIG. 1 of the drawing shows a compressor which is connected to a drive 3 by means of a disk clutch 2 or multi-plate clutch which is loaded by compression springs 1 in the closing direction.
  • the drive 3 is designed as a V-belt pulley connected to the housing-like input part 4 in a rotationally fixed manner, which is driven in a manner not shown via V-belts by a drive motor, for example the drive motor of a motor vehicle.
  • the disc clutch acts against an output 5, which partially passes through the bearing cap of the compressor and is connected to the drive shaft of the compressor in a manner not shown.
  • At least three compression springs 1 pass through the disk or disk pack of the disk clutch 2 at the same angular distance from one another and are each guided in a sleeve 6.
  • the individual sleeves are open on the left side as shown and support the compression springs 1 on the right side as shown.
  • the sleeves 6 are supported by a radially projecting flange on a pressure plate 7, which carries a plurality of pressure bolts 8 at the same time.
  • At least three such pressure bolts 8 are provided at corresponding angular distances between the compression springs 1 and are supported on the right end as shown by an intermediate ring 9 on a roller bearing 10.
  • the intermediate ring 9 and the part of the roller bearing 10 which bears against it are guided axially displaceably and rotatably in a recess 11 in the bearing cap of the compressor.
  • the recess 11 goes on as shown right end in an annular space 12, in which a sealing ring 13 serving as an annular piston is sealed and axially displaceably mounted.
  • a channel 14 opens into the annular space 12, which also runs in the bearing cover of the compressor and / a control line 15 is connected to the control valve 16 according to the invention which is explained in detail below.
  • the channel 14 extends obliquely to the axis of the bearing cover, so that it intersects the annular space 12 and ends blindly opposite to its pipe connection. It can be closed there, for example, by a plug 17.
  • the disk or disk set of the disk clutch 2 is non-rotatably, but axially displaceably coupled both to the input part 4 and to the output part 19 belonging to the output 5 and rotatably mounted via a roller bearing 18 in the input part.
  • the output part 19 is rigidly connected in a conventional manner to the conical part of the output 5 and is therefore connected to the drive or crankshaft of the compressor, not shown.
  • a reduction gear or the like can of course also in a manner not shown. Intermediate element inserted.
  • An intermediate ring 20 is arranged between the sealing ring 13 and the part of the roller bearing 10 facing it, which is guided in a non-rotatable but axially displaceable manner in the bearing cap of the compressor by means of a wedge guide.
  • the compressor connected to the disk clutch becomes rotating when the V-belt pulley shown as drive 3 rotates via the input part 4, which is brought together by the compression springs 1 quantity-pressed disk or disk pack of the disk clutch 2, the output part 19 and the output 5 driven in such a way that the compressor runs with a certain power consumption. If the pressure in the compressed air tank fed by the compressor via the control valve 16 has reached a certain limit value, then this pressure acts on the sealing ring 13 via the control line 15 connected to the compressed air tank in the manner described below, such that the sealing ring 13 is shifted to the left as shown becomes.
  • the pressure plate 7 is also displaced to the left against the force of the compression springs 1 via the intermediate ring 20 and the roller bearing 10 and the intermediate ring 9 and the pressure bolts 8 resting thereon, so that the pressing of the disk or disk pack of the disk clutch 2 canceled and the disc clutch 2 is thus disengaged.
  • the drive connection between the drive 3 and the compressor is thus interrupted, ie the compressor stops when the drive 3 continues to rotate.
  • the control valve 16 connected to the control line 15 is connected via a connection 21 to the pressure port of the compressor, which in turn opens into the pressure chamber (not shown).
  • the connector 21 The passage 23 through the control valve is connected to the consumer via the pressure connection 24 and optionally a compressed air tank (not shown).
  • a check valve 26 which acts in relation to a valve seat 25.
  • a channel 27 branches off at the front of the check valve and a further channel 28 at the rear of the check valve, as viewed in the flow direction with respect to the check valve.
  • the channel 28 (FIGS. 2 and 3) opens into a chamber 29 of a pressure regulator 30 of a construction known per se.
  • the pressure in the chamber 29 acts on the end face of the regulator piston 31 shown in FIG.
  • the pressure present via the channel 28 acts against a switching piston 37 of a ventilation valve 38 which is likewise arranged in the housing of the control valve and in which a spring-loaded sealing body is pressed against a valve seat 40.
  • a vent line 41 which in the from the plunger of the Sealing body penetrates bore and which has a connection 42 (FIGS. 1 and 2) on the outside of the housing of the valve arrangement.
  • the vent line 41 continues - starting from the connection 42 - in the manner shown in FIG. 1 and opens within the suction chamber of the compressor, to which a suction connection 43 open to the atmosphere is connected.
  • the suction port 43 is connected via the suction chamber of the compressor and the vent line 41 connected to it to the port 42, which in the manner described below with the vent valve 38 open via the channel 27 to the channel 23 and accordingly to the pressure port 22 of the compressor in Connection came. In this way, the pressure chamber of the compressor can be vented.
  • control valve / vent valve and pneumatically controlled compressor shut-off clutch works as follows:
  • the pressure in Connection 36 also acts, as explained above, on the switching piston 37 in such a way that it lifts the sealing body 39 from the valve seat 40.
  • the compressed air which is under high pressure in the pressure chamber of the compressor after the compressor has come to a standstill and is present via the connection 21 in the channel 23 (with the check valve 26 closed), can get into the connection 42 as a result of the opening of the vent valve 38.
  • the port 42 is vented via the vent line 41, the suction chamber of the compressor and the suction port 43, that is, that the pressure chamber of the compressor is vented when the predetermined cut-off pressure is reached. Venting takes place via the suction chamber of the cylinder head of the compressor, since venting noises are avoided.
  • the annular space 34 of the pressure regulator 30 is connected via a connection (not shown) to the annular chamber 44 of the pressure regulator receiving the spring 32, this annular chamber in turn via the connection 35, only shown schematically, to the connection 36, the control line 15 and the annular space 12 connected is.
  • the pressure regulator 30 is in the manner of a " designed lossless "pressure regulator, that is, when the regulator piston 31 is again pressed sealingly against the valve seat 33 (due to the tensioning of the spring 32), then the regulator piston opens a vent opening (not shown) in the area of the adjusting screw of the pressure regulator shown in FIG. 2, and thereby a free vent connection to the annular space 12 of the disk clutch 2 is established.
  • the compression springs 1 are able to re-engage the disk clutch 2 due to the pressure reduction in the annular space 12, such that a connection is established between the drive 3 and the output 5 and thus with the drive shaft of the compressor.
  • the pressure chamber of the compressor was vented when the consumer cut-off pressure was reached and is accordingly in a vented, ie depressurized state, even when the disk clutch is re-engaged and the compressor is restarted. Accordingly, the compressor can be started without back pressure, which enables a small design of the disk clutch, in particular in the design of the compression springs.
  • the vent valve 38 is of course again in the closed position due to the lower consumer pressure, i.e. that the channel 27 is closed and when the compressor starts up again normally via the channel 23, the check valve 26 and the pressure connection 24 (with the consumer connected) is promoted.
  • a heat-resistant seal 45 which is shown in FIGS. 2 and 3, is located between the housing receiving the channel 23 and the housing receiving the vent valve 38.
  • This enables the valve arrangement to manufacture from pressure regulator and vent valve in a structural unit and to connect to the compressor or the cylinder head of the same without additional aids.
  • the invention is also implemented in the context of an arrangement in which the individual parts of the control valve are separated from one another; in the same way, instead of the disk clutch 2, another construction suitable for such clutches can be used.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

1. Pneumatically controlled compressor cut-off coupling with a valve device and with a control line leading from the pressure chamber of the compressor to the coupling, the pressure of which can disconnect the coupling at a predetermined level in such a way that the compressor comes to a standstill when the drive continues and after repeated pressure-dependent disconnection of the coupling starts up again, characterised in that the control line (15) leading to the coupling is fed from a pressure regulator (30) which is connected to the pressure connection (24) of the compressor and in its closed position ventilates the control line with respect to the external air, in that between the pressure chamber of the compressor and its suction chamber there is a connection which can be blocked by a vent valve (38), and in that the vent valve (38) can be moved, by means of a switch element (switching piston 37) that is acted upon by the pressure in the control line (15), when a predetermined switching pressure is reached, into the position that is open with respect to the pressure chamber and which releases the vent connection to the suction chamber of the compressor.

Description

Die Erfindung betrifft eine Ventilvorrichtung nach dem Gattungsbegriff des Patentanspruches 1.The invention relates to a valve device according to the preamble of claim 1.

Bei pneumatisch gesteuerten Kompressor-Abschaltkupplungen wird der Druck des vom Kompressor beschickten Verbrauchers verwendet, um bei Erreichen eines bestimmten Wertes als Abschaltdruck auf abgedichtet verschiebliche Betätigungsorgane einer Kupplung einzuwirken, welche im Betrieb den Antrieb des Kompressors mit dem Abtrieb, d.h. mit der Antriebs- bzw. Kurbelwelle des Kompressors verbindet. Der Abschaltdruck vermag derartige Kupplungen, welche beispielsweise als Lamellenkupplungen bestehen, auszurücken, so daß der Kompressor bei weiterhin laufendem Antrieb zum Stillstand kommt und dadurch ein unnötiger Kompressor-Betrieb vermieden wird. Sinkt der auf die Kupplung einwirkende Druck wiederum unter den Abschalt-Wert ab, dann wird die Kupplung im allgemeinen selbsttätig, so mit Hilfe von Federpaketen etc. eingerückt, derart, daß die Antriebsverbindung zwischen Antrieb und Abtrieb der Kompressoranlage hergestellt ist und der Kompressor wieder zu laufen beginnt und nach einer gewissen Zeit hochfährt. Dieses Anfahren des Kompressors geschieht gegen beträchtlichen Widerstand, d.h. der Kolben des Kompressors muß gegen den im Druckraum des Kompressors nach dem Abschalten verbleibenden Druck angefahren werden. Dieses Anfahren geschieht also entgegen dem Gegendruck des Kompressors, weshalb wegen des erhöhten Widerstandsmoments verhältnismäßig stark dimensionierte Federn für den Kraftschluß der Kupplung benötigt werden. Diese stark dimensionierten Federn führen zu einer vergleichsweise großen Bauform der Kupplung, ein Einsatz in beengten Verhältnissen, so in einem Kraftfahrzeug o.dgl., ist dadurch erschwert.In the case of pneumatically controlled compressor shut-off clutches, the pressure of the consumer supplied by the compressor is used to act as a shut-off pressure on sealingly displaceable actuating elements of a clutch when a certain value is reached, which actuators actuate the compressor with the output, ie with the drive or Crankshaft of the compressor connects. The cut-off pressure is able to disengage such clutches, which consist, for example, of multi-plate clutches, so that the compressor comes to a standstill while the drive is still running, thereby avoiding unnecessary compressor operation. If the pressure acting on the clutch again drops below the cut-off value, the clutch is generally engaged automatically, with the aid of spring assemblies etc., in such a way that the drive connection between the drive and output of the compressor system is established and the compressor is closed again starts to run and starts up after a certain time. This start of the com pressors occurs against considerable resistance, ie the piston of the compressor must be started against the pressure remaining in the pressure chamber of the compressor after switching off. This start-up takes place against the back pressure of the compressor, which is why, due to the increased resistance torque, relatively large springs are required for the frictional connection of the clutch. These strongly dimensioned springs lead to a comparatively large design of the coupling, which makes use in cramped conditions, such as in a motor vehicle or the like, difficult.

Davon ausgehend besteht die Aufgabe der Erfindung darin, eine pneumatisch gesteuerte Kompressor-Abschaltkupplung der gattungsgemäßen Art so auszubilden, daß der Anlauf des Kompressors gegen einen geringen Anfahrwiderstand erfolgen kann; es soll insbesondere möglich sein, die Bauform der Kupplung klein zu halten.Based on this, the object of the invention is to design a pneumatically controlled compressor shut-off clutch of the generic type in such a way that the compressor can be started up against a low starting resistance; in particular, it should be possible to keep the design of the coupling small.

Die Lösung dieser Aufgabe besteht aus den Merkmalen des Kennzeichnungsteils des Patentanspruches 1.The solution to this problem consists of the features of the characterizing part of claim 1.

Durch die Entlüftung des Druckraumes des Kompressors bei Erreichen des Abschaltdruckes ist auf einfache Weise gewährleistet, daß der Kolben des Kompressors gegendrucklos anläuft. Für die Übertragung des Antriebs-Drehmoments reichen demnach verhältnismäßig klein dimensionierte Federn von reduzierter Baulänge aus, ein baulicher Vorteil, welcher den Einsatz der Kompressoranlage selbst in beengten Verhältnissen ermöglicht. Das Entlüften des Druckraumes des Kompressors geschieht über eine Entlüftungsleitung, die in den Saugraum des Kompressors mündet und dadurch mit dem gegenüber Außenluft offenen Sauganschluß in Verbindung steht. Diese Art der Entlüftung ist von besonderem Vorteil, da die normalerweise auftretenden Entlüftungsgeräusche bei offener Entlüftung weitgehend entfallen.By venting the pressure chamber of the compressor when the cut-off pressure is reached, it is ensured in a simple manner that the piston of the compressor starts up without counterpressure. For the transmission of the drive torque, relatively small springs of reduced length are sufficient, a structural advantage that enables the compressor system to be used even in tight spaces. The pressure chamber of the compressor is vented via a ventilation line which opens into the suction chamber of the compressor and is thus connected to the suction connection that is open to outside air. This type of venting is particularly beneficial as the normal one wise venting noises with open venting are largely eliminated.

Sowohl der Druckregler der Regelvorrichtung als auch das Entlüftungsventil können in baulich gedrängter Weise in einem gemeinsamen Gehäuse angeordnet sein,welches unter Zwischenschaltung einer wärmeisolierenden Dichtung mit dem den Druckauslaß aufnehmenden Gehäuse bzw. dem Auslaßstutzen des Kompressors verbunden ist. Es ist somit möglich, die das Entlüftungsventil und den Druckregler umfassende Regelventileinrichtung vom Kompressor bzw. dem Druckstutzen desselben zu lösen.Both the pressure regulator of the control device and the vent valve can be arranged in a structurally compact manner in a common housing which is connected with the interposition of a heat-insulating seal with the housing receiving the pressure outlet or the outlet port of the compressor. It is thus possible to detach the control valve device comprising the vent valve and the pressure regulator from the compressor or the pressure port of the same.

Der Druckregler der Regelventileinrichtung ist vorzugsweise mit einer Stellschraube versehen, um dadurch sowohl den Abschaltdruck für die Kupplung des Kompressors als auch den Zeitpunkt der Entlüftung des Druckraums zu bestimmen.The pressure regulator of the control valve device is preferably provided with an adjusting screw in order to thereby determine both the cut-off pressure for the clutch of the compressor and the point in time at which the pressure chamber is vented.

Vorteilhafte Ausgestaltungen und Weiterbildungen sind in weiteren Patentansprüchen aufgeführt.Advantageous refinements and developments are listed in further patent claims.

Die Erfindung ist nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügte Zeichnung . erläutert.

  • Figur 1 ist eine teilweise geschnittene Seitenansicht eines Kompressors mit einer mit der Regelventileinrichtung pneumatisch steuerbaren Kompressor-Abschaltkupplung;
  • Figur 2 ist eine Schnittansicht der Regelventileinrichtung unter Darstellung des Druckreglers; und
  • Figur 3 ist eine Schnittansicht von Linie III-III in Figur 2.
The invention is based on an embodiment with reference to the accompanying drawings. explained.
  • FIG. 1 is a partially sectioned side view of a compressor with a compressor shut-off clutch that can be pneumatically controlled with the control valve device;
  • Figure 2 is a sectional view of the control valve device showing the pressure regulator; and
  • Figure 3 is a sectional view of line III-III in Figure 2.

In Figur 1 der Zeichnung ist ein Kompressor dargestellt, welcher mittels einer durch Druckfedern 1 in Schließrichtung belasteten Scheibenkupplung 2 bzw. Lamellenkupplung mit einem Antrieb 3 verbunden ist. Der Antrieb 3 ist als eine mit dem gehäuseartig ausgebildeten Eingangsteil 4 drehfest verbundene, strichpunktiert dargestellte Keilriemenscheibe ausgebildet, welche in nicht-dargestellter Weise über Keilriemen von einem Antriebsmotor, beispielsweise dem Antriebsmotor eines Kraftfahrzeugs angetrieben wird. Die Scheibenkupplung wirkt gegenüber einem Abtrieb 5, welcher den Lagerdeckel des Kompressors teilweise durchsetzt und in nicht dargestellter Weise an die Antriebswelle des Kompressors angeschlossen ist.FIG. 1 of the drawing shows a compressor which is connected to a drive 3 by means of a disk clutch 2 or multi-plate clutch which is loaded by compression springs 1 in the closing direction. The drive 3 is designed as a V-belt pulley connected to the housing-like input part 4 in a rotationally fixed manner, which is driven in a manner not shown via V-belts by a drive motor, for example the drive motor of a motor vehicle. The disc clutch acts against an output 5, which partially passes through the bearing cap of the compressor and is connected to the drive shaft of the compressor in a manner not shown.

Wenigstens drei Druckfedern 1 durchsetzen unter gleichem Winkelabstand zueinander das Scheiben- bzw. Lamellenpaket der Scheibenkupplung 2 und sind jeweils in einer Hülse 6 geführt. Die einzelnen Hülsen sind an der gemäß Darstellung linken Seite offen und stützen an der gemäß Darstellung rechten Seite die Druckfedern 1 ab. Die Hülsen 6 sind mittels eines radial auskragenden Flansches an einer Druckplatte 7 abgestützt, welche gleichzeitig mehrere Druckbolzen 8 trägt. Wenigstens drei derartige Druckbolzen 8 sind unter entsprechenden Winkelabständen verteilt zwischen den Druckfedern 1 vorgesehen und stützen sich am gemäß Darstellung rechten Ende über einen Zwischenring 9 an einem Wälzlager 10 ab. Der Zwischenring 9 und der an diesem anliegende Teil des Wälzlagers 10 sind axial verschieblich und drehbar in einer Ausnehmung 11 des Lagerdeckels des Kompressors geführt. Die Ausnehmung 11 geht am gemäß Darstellung rechten Ende in einen Ringraum 12 über, in welchem ein als Ringkolben dienender Dichtungsring 13 abgedichtet axial verschieblich gelagert ist. In den Ringraum 12 mündet ein Kanal 14, der ebenfalls im Lager- über deckel des Kompressors verläuft und/eine Steuerleitung 15 an das nachfolgend im einzelnen erläuterte, erfindungsgemäße Regelventil 16 angeschlossen ist. Der Kanal 14 verläuft schräg zur Achse des Lagerdeckels, so daß er den Ringraum 12 schneidet und endet gegenüberliegend zu seinem Rohranschluß blind. Er kann dort beispielsweise durch einen Stopfen 17 verschlossen sein.At least three compression springs 1 pass through the disk or disk pack of the disk clutch 2 at the same angular distance from one another and are each guided in a sleeve 6. The individual sleeves are open on the left side as shown and support the compression springs 1 on the right side as shown. The sleeves 6 are supported by a radially projecting flange on a pressure plate 7, which carries a plurality of pressure bolts 8 at the same time. At least three such pressure bolts 8 are provided at corresponding angular distances between the compression springs 1 and are supported on the right end as shown by an intermediate ring 9 on a roller bearing 10. The intermediate ring 9 and the part of the roller bearing 10 which bears against it are guided axially displaceably and rotatably in a recess 11 in the bearing cap of the compressor. The recess 11 goes on as shown right end in an annular space 12, in which a sealing ring 13 serving as an annular piston is sealed and axially displaceably mounted. A channel 14 opens into the annular space 12, which also runs in the bearing cover of the compressor and / a control line 15 is connected to the control valve 16 according to the invention which is explained in detail below. The channel 14 extends obliquely to the axis of the bearing cover, so that it intersects the annular space 12 and ends blindly opposite to its pipe connection. It can be closed there, for example, by a plug 17.

Das Scheiben- bzw. Lamellenpaket der Scheibenkupplung 2 ist drehfest, aber axial verschieblich sowohl mit dem Eingangsteil 4 als auch mit dem über ein Wälzlager 18 im Eingangsteil drehbar gelagerten, dem Abtrieb 5 zugehörenden Ausgangsteil 19 gekoppelt. Der Ausgangsteil 19 ist in üblicher Weise mit dem konusförmigen Teil des Abtriebs 5 starr verbunden und steht demnach mit der nicht dargestellten Antriebs- bzw. Kurbelwelle des Kompressors in Verbindung. Zwischen der Scheibenkupplung 2 und dem Kompressor kann natürlich auch in nicht dargestellter Weise ein Untersetzungsgetriebe o.dgl. Zwischenelement eingefügt sein.The disk or disk set of the disk clutch 2 is non-rotatably, but axially displaceably coupled both to the input part 4 and to the output part 19 belonging to the output 5 and rotatably mounted via a roller bearing 18 in the input part. The output part 19 is rigidly connected in a conventional manner to the conical part of the output 5 and is therefore connected to the drive or crankshaft of the compressor, not shown. Between the disc clutch 2 and the compressor, a reduction gear or the like can of course also in a manner not shown. Intermediate element inserted.

Zwischen den Dichtungsring 13 und dem diesen zugewandten Teil des Wälzlagers 10 ist ein Zwischenring 20 eingeordnet, welcher vermittels einer Keilführung undrehbar, aber axial verschieblich im Lagerdeckel des Kompressors geführt ist.An intermediate ring 20 is arranged between the sealing ring 13 and the part of the roller bearing 10 facing it, which is guided in a non-rotatable but axially displaceable manner in the bearing cap of the compressor by means of a wedge guide.

Bei laufendem Antriebsmotor wird der mit der Scheibenkupplung in Verbindung stehende Kompressor bei Umlauf der als Antrieb 3 dargestellten Keilriemenscheibe über den Eingangsteil 4, das durch die Druckfedern 1 zusammengepresste Scheiben- bzw. Lamellenpaket der Scheibenkupplung 2, den Ausgangsteil 19 und den Abtrieb 5 angetrieben, derart, daß der Kompressor mit einer gewissen Leistungsaufnahme läuft. Hat der Druck im vom Kompressor über das Regelventil 16 gespeisten Druckluftbehälter einen bestimmten Grenzwert erreicht, so wirkt dieser Druck über die in nachfolgend beschriebener Weise an den Druckluftbehälter angeschlossene Steuerleitung 15 auf den Dichtungsring 13 ein, derart, daß der Dichtungsring 13 gemäß Darstellung nach links verschoben wird. Bei dieser Verschiebung wird über den Zwischenring 20 und das Wälzlager 10 sowie den Zwischenring 9 und den an diesem anliegenden Druckbolzen 8 die Druckplatte 7 entgegen der Kraft der Druckfedern 1 ebenfalls nach links verschoben, so daß die Pressung des Scheiben- bzw. Lamellenpakets der Scheibenkupplung 2 aufgehoben und die Scheibenkupplung 2 somit ausgerückt wird. Die Antriebsverbindung zwischen dem Antrieb 3 und dem Kompressor ist damit unterbrochen, d.h., daß der Kompressor bei weiterhin rotierendem Antrieb 3 stehenbleibt.When the drive motor is running, the compressor connected to the disk clutch becomes rotating when the V-belt pulley shown as drive 3 rotates via the input part 4, which is brought together by the compression springs 1 quantity-pressed disk or disk pack of the disk clutch 2, the output part 19 and the output 5 driven in such a way that the compressor runs with a certain power consumption. If the pressure in the compressed air tank fed by the compressor via the control valve 16 has reached a certain limit value, then this pressure acts on the sealing ring 13 via the control line 15 connected to the compressed air tank in the manner described below, such that the sealing ring 13 is shifted to the left as shown becomes. During this displacement, the pressure plate 7 is also displaced to the left against the force of the compression springs 1 via the intermediate ring 20 and the roller bearing 10 and the intermediate ring 9 and the pressure bolts 8 resting thereon, so that the pressing of the disk or disk pack of the disk clutch 2 canceled and the disc clutch 2 is thus disengaged. The drive connection between the drive 3 and the compressor is thus interrupted, ie the compressor stops when the drive 3 continues to rotate.

Sinkt der Druck in dem vom Kompressor zu speisenden Druckluftbehälter wieder ab, dann überwindet die Kraft der Druckfedern 1 die im Ringraum 12 entgegenwirkende Kraft der Druckluft, so daß die Scheibenkupplung 2 wieder einrückt und die Antriebsverbindung zwischen dem Antrieb 3 und dem Abtrieb 5 wieder hergestellt ist. Der Kompressor läuft dann wieder in normaler Weise und fördert Druckluft.If the pressure in the compressed air tank to be fed by the compressor drops again, then the force of the compression springs 1 overcomes the force of the compressed air counteracting in the annular space 12, so that the disk clutch 2 engages again and the drive connection between the drive 3 and the output 5 is restored . The compressor then runs again in the normal way and delivers compressed air.

Das mit der Steuerleitung 15 in Verbindung stehende Regelventil 16 steht über einen Anschluß 21 mit dem Druckstutzen des Kompressors in Verbindung, welcher seinerseits in den (nicht dargestellten) Druckraum mündet. Der sich an den Anschluß 21 anschließende, das Regelventil durchsetzende Kanal 23 steht über den Druckanschluß 24 und gegebenenfalls einen (nicht dargestellten) Druckluftbehälter mit dem Verbraucher in Verbindung. Innerhalb des Kanals 23 befindet sich ein gegenüber einem Ventilsitz 25 wirkendes Rückschlagventil 26. Vom Kanal 23 zweigen - bezüglich des Rückschlagventils in Strömungsrichtung gesehen - an der Vorderseite des Rückschlagventils ein Kanal 27 und an der Rückseite des Rückschlagventils 26 ein weiterer Kanal 28 ab. Der Kanal 28 (Fig. 2 und 3) mündet in eine Kammer 29 eines Druckreglers 30 von an sich bekannter Konstruktion. Der Druck in der Kammer 29 beaufschlagt die Stirnseite des in Fig. 2 dargestellten Reglerkolbens 31, welcher unter Abdichtung - bei Verspannung durch eine Feder 32 - an einem Ventilsitz 33 anliegt. Hebt der Reglerkolben 31 in nachfolgend erläuterter Weise von dem Ventilsitz 33 ab, dann wird bei öffnen des durch Reglerkolben und Ventilsitz gebildeten Ventils der radial außerhalb des Ventilsitzes 33 bestehende, in Fig. 2 flach ausgebildet wiedergegebene Ringraum 34 mit dem Druck des Kanals 28 beaufschlagt. Der Ringraum 34 ist seinerseits über eine (in Fig. 2 nicht dargestellte),, in Fig. 3 gestrichelt wiedergegebene Verbindung 35 an einen Anschluß 36 angeschlossen, welcher mit dem in Fig. 1 oberen Ende der Steuerleitung 15 verbunden ist. Der im Anschluß 36 herrschende Druck wirkt demnach über die Steuerleitung 15 auch im Ringraum 12 und somit auf den Dichtungsring 13 ein. Gleichzeitig wirkt der über den Kanal 28 anstehende Druck (Verbraucherdruck) gegenüber einem Schaltkolben 37 eines gleichfalls im Gehäuse des Regelventils angeordneten Entlüftungsventils 38, bei welchem ein federverspannter Dichtkörper an einen Ventilsitz 40 angepresst ist. Zwischen dem Dichtkörper 39 und dem Schaltkolben 37 zweigt eine Entlüftungsleitung 41 ab, welche in die vom Stößel des Dichtkörpers durchsetzte Bohrung mündet und welche an der Außenseite des Gehäuses der Ventilanordnung einen Anschluß 42 (Fig. 1 und 2) aufweist. Die Entlüftungsleitung 41 setzt sich - ausgehend vom Anschluß 42 - in der in Fig. 1 dargestellten Weise fort und mündet innerhalb des Saugraums des Kompressors, an welchen ein gegen Atmosphäre offener Sauganschluß 43 angeschlossen ist. Somit steht der Sauganschluß 43 über den Saugraum des Kompressors und die an ihn angeschlossene Entlüftungsleitung 41 mit dem Anschluß 42 in Verbindung, der in nachfolgend beschriebener Weise bei geöffnetem Entlüftungsventil 38 über den Kanal 27 mit dem Kanal 23 und demnach mit dem Druckstutzen 22 des Kompressors in Verbindung gelangt. Auf diese Weise kann der Druckraum des Kompressors entlüftet werden.The control valve 16 connected to the control line 15 is connected via a connection 21 to the pressure port of the compressor, which in turn opens into the pressure chamber (not shown). The connector 21 The passage 23 through the control valve is connected to the consumer via the pressure connection 24 and optionally a compressed air tank (not shown). Within the channel 23 there is a check valve 26 which acts in relation to a valve seat 25. From the channel 23, a channel 27 branches off at the front of the check valve and a further channel 28 at the rear of the check valve, as viewed in the flow direction with respect to the check valve. The channel 28 (FIGS. 2 and 3) opens into a chamber 29 of a pressure regulator 30 of a construction known per se. The pressure in the chamber 29 acts on the end face of the regulator piston 31 shown in FIG. 2, which rests against a valve seat 33 under sealing - when braced by a spring 32. If the regulator piston 31 lifts off the valve seat 33 in the manner explained below, then when the valve formed by the regulator piston and the valve seat is opened, the annular space 34, which is shown radially outside the valve seat 33 and is shown flat in FIG. 2, is acted upon by the pressure of the channel 28. The annular space 34 is in turn connected via a connection 35 (not shown in FIG. 2), shown in broken lines in FIG. 3, to a connection 36 which is connected to the upper end of the control line 15 in FIG. 1. The pressure prevailing in the connection 36 accordingly acts via the control line 15 also in the annular space 12 and thus on the sealing ring 13. At the same time, the pressure present via the channel 28 (consumer pressure) acts against a switching piston 37 of a ventilation valve 38 which is likewise arranged in the housing of the control valve and in which a spring-loaded sealing body is pressed against a valve seat 40. Between the sealing body 39 and the switching piston 37 branches off a vent line 41, which in the from the plunger of the Sealing body penetrates bore and which has a connection 42 (FIGS. 1 and 2) on the outside of the housing of the valve arrangement. The vent line 41 continues - starting from the connection 42 - in the manner shown in FIG. 1 and opens within the suction chamber of the compressor, to which a suction connection 43 open to the atmosphere is connected. Thus, the suction port 43 is connected via the suction chamber of the compressor and the vent line 41 connected to it to the port 42, which in the manner described below with the vent valve 38 open via the channel 27 to the channel 23 and accordingly to the pressure port 22 of the compressor in Connection came. In this way, the pressure chamber of the compressor can be vented.

Die Wirkungsweise der zuvor beschriebenen Anordnung aus Regelventil/Entlüftungsventil und pneumatisch gesteuerter Kompressor-Abschaltkupplung ist wie folgt:The arrangement of the control valve / vent valve and pneumatically controlled compressor shut-off clutch works as follows:

Wird bei laufendem, über den Antrieb 3 angetriebenen Kompressor ein vorbestimmter Maximaldruck erzeugt, welcher im Druckanschluß 24 und damit auch im Kanal 28 und in der Kammer 29 des Druckreglers 30 ansteht, dann hebt der normalerweise am Ventilsitz 33 anliegende Reglerkolben 31 von diesem Ventilsitz ab und gibt die Verbindung in den Ringraum 34 frei. Der Druck wirkt über die in Fig. 3 gestrichelt wiedergegebene Verbindung 35 im Anschluß 36 und von dort über die Steuerleitung 15 und den Kanal 14 im Ringraum 12, derart, daß der Druck den Dichtungsring 13 beaufschlagt und diesen gemäß Fig.l in zuvor beschriebener Weise nach links gerichtet verschiebt, um die Kupplungsverbindung zwischen dem Antrieb 3 und dem Abtrieb 5 zu lösen. Der Kompressor steht nunmehr still, während der Antrieb 3 bei entkuppelter Scheibenkupplung 2 weiterhin läuft. Der Druck im Anschluß 36 wirkt desgleichen,wie vorstehend erläutert wurde, auf den Schaltkolben 37, derart, daß dieser den Dichtkörper 39 vom Ventilsitz 40 abhebt. Die nach dem Stillstand des Kompressors im Druckraum desselben unter hohem Druck stehende Druckluft, welche über den Anschluß 21 im Kanal 23 (bei geschlossenem Rückschlagventil 26) ansteht, kann infolge der öffnung des Entlüftungsventils 38 in den Anschluß 42 gelangen. Der Anschluß 42 ist über die Entlüftungsleitung 41, den Saugraum des Kompressors und den Sauganschluß 43 entlüftet, das heißt-, daß der Druckraum des Kompressors bei Erreichen des vorbestimmten Abschaltdruckes entlüftet wird. Die Entlüftung geschieht über den Saugraum des Zylinderkopfes des Kompressors, da hierbei Entlüftungsgeräusche vermieden werden.If a predetermined maximum pressure which is present in the pressure connection 24 and thus also in the channel 28 and in the chamber 29 of the pressure regulator 30 is generated while the compressor 3 is running, then the regulator piston 31 which is normally in contact with the valve seat 33 lifts off this valve seat and releases the connection in the annular space 34. The pressure acts via the connection 35 shown in dashed lines in FIG. 3 in the connection 36 and from there via the control line 15 and the channel 14 in the annular space 12, such that the pressure acts on the sealing ring 13 and this in accordance with FIG. 1 in the manner described above moves to the left to release the coupling connection between the drive 3 and the output 5. The compressor is now at a standstill, while the drive 3 continues to run when the disk clutch 2 is disengaged. The pressure in Connection 36 also acts, as explained above, on the switching piston 37 in such a way that it lifts the sealing body 39 from the valve seat 40. The compressed air, which is under high pressure in the pressure chamber of the compressor after the compressor has come to a standstill and is present via the connection 21 in the channel 23 (with the check valve 26 closed), can get into the connection 42 as a result of the opening of the vent valve 38. The port 42 is vented via the vent line 41, the suction chamber of the compressor and the suction port 43, that is, that the pressure chamber of the compressor is vented when the predetermined cut-off pressure is reached. Venting takes place via the suction chamber of the cylinder head of the compressor, since venting noises are avoided.

Sinkt der über den Druckanschluß 24 anstehende Verbraucherdruck wieder unter den vorbestimmten Abschaltdruck ab, dann überwindet die Kraft der Feder 32 den Gegendruck in der Kammer 29, derart, daß der Reglerkolben 31 wiederum dichtend und schließend an den Ventilsitz 33 angedrückt wird. Der Ringraum 34 des Druckreglers 30 steht über eine (nicht dargestellte) Verbindung mit der die Feder 32 aufnehmenden Ringkammer 44 des Druckreglers in Verbindung, wobei diese Ringkammer wiederum über die nur schematisch dargestellte Verbindung 35 mit dem Anschluß 36, der Steuerleitung 15 und dem Ringraum 12 verbunden ist. Um das bei überschreiten des Abschaltdruckes und Schließen des Reglerkolbens 31 erforderliche, erneute Einrücken der Scheibenkupplung 2 zu ermöglichen, werden der Ringraum 12 bzw. die mit ihm verbundene Steuerleitung 15 über die Ringkammer 44 entlüftet: Zu diesem Zweck ist der Druckregler 30 in Art eines "verlustlosen" Druckreglers ausgestaltet, d.h., wenn der Reglerkolben 31 wieder dichtend an den Ventilsitz 33 angedrückt wird (durch die Verspannung der Feder 32), dann gibt der Reglerkolben eine (nicht dargestellte) Entlüftungsöffnung im Bereich der in Fig. 2 dargestellten Stellschraube des Druckreglers frei,und dadurch wird eine freie Entlüftungs-Verbindung zum Ringraum 12 der Scheibenkupplung 2 hergestellt. Nunmehr vermögen die Druckfedern 1 infolge des Druckabbaus im Ringraum 12 die Scheibenkupplung 2 wieder einzurücken, derart, daß eine Verbindung zwischen dem Antrieb 3 und dem Abtrieb 5 und damit mit der Antriebswelle des Kompressors hergestellt ist.If the consumer pressure applied via the pressure connection 24 drops again below the predetermined cut-off pressure, then the force of the spring 32 overcomes the counterpressure in the chamber 29 in such a way that the regulator piston 31 is pressed against the valve seat 33 in a sealing and closing manner. The annular space 34 of the pressure regulator 30 is connected via a connection (not shown) to the annular chamber 44 of the pressure regulator receiving the spring 32, this annular chamber in turn via the connection 35, only shown schematically, to the connection 36, the control line 15 and the annular space 12 connected is. In order to enable the disk clutch 2 to be re-engaged when the shut-off pressure is exceeded and the regulator piston 31 closes, the annular space 12 or the control line 15 connected to it are vented via the annular chamber 44: for this purpose the pressure regulator 30 is in the manner of a " designed lossless "pressure regulator, that is, when the regulator piston 31 is again pressed sealingly against the valve seat 33 (due to the tensioning of the spring 32), then the regulator piston opens a vent opening (not shown) in the area of the adjusting screw of the pressure regulator shown in FIG. 2, and thereby a free vent connection to the annular space 12 of the disk clutch 2 is established. Now the compression springs 1 are able to re-engage the disk clutch 2 due to the pressure reduction in the annular space 12, such that a connection is established between the drive 3 and the output 5 and thus with the drive shaft of the compressor.

Der Druckraum des Kompressors wurde, wie vorstehend dargelegt ist, bei Erreichen des Verbraucher-Abschaltdruckes entlüftet und befindet sich demgemäß auch während des erneuten Einrückens der Scheibenkupplung und erneutem Anlauf des Kompressors in entlüftetem, also drucklosen Zustand. Das Anlaufen des Kompressors ist demnach gegendrucklos ermöglicht, was eine kleine Bauform der Scheibenkupplung, insbesondere in der Ausbildung der Druckfedern, ermöglicht. Bei diesem erneuten Anlauf des Kompressors ist natürlich das Entlüftungsventil 38 infolge des abgesunkenen Verbraucherdruckes wieder in Verschlußlage, d.h., daß der Kanal 27 geschlossen ist und beim Hochlaufen des Kompressors wieder normal über den Kanal 23, das Rückschlagventil 26 und den Druckanschluß 24 (mit dem Verbraucher verbunden) gefördert wird.As stated above, the pressure chamber of the compressor was vented when the consumer cut-off pressure was reached and is accordingly in a vented, ie depressurized state, even when the disk clutch is re-engaged and the compressor is restarted. Accordingly, the compressor can be started without back pressure, which enables a small design of the disk clutch, in particular in the design of the compression springs. During this restart of the compressor, the vent valve 38 is of course again in the closed position due to the lower consumer pressure, i.e. that the channel 27 is closed and when the compressor starts up again normally via the channel 23, the check valve 26 and the pressure connection 24 (with the consumer connected) is promoted.

Da der den Kanal 23 und das Rückschlagventil 26 aufnehmende Bereich des Regelventils verhältnismäßig hohen Temperaturen ausgesetzt ist, befindet sich zwischen dem den Kanal 23 aufnehmenden Gehäuse und dem das Entlüftungsventil 38 aufnehmenden Gehäuse eine wärmefeste Dichtung 45, welche in Fig. 2 und 3 dargestellt ist. Es ist auf diese Weise ermöglicht, die Ventilanordnung aus Druckregler und Entlüftungsventil in einer baulichen Einheit zu fertigen und ohne zusätzliche Hilfsmittel am Kompressor bzw. am Zylinderkopf desselben anzuschließen. Die Erfindung ist jedoch auch im Rahmen einer Anordnung verwirklicht, bei welcher die Einzelteile des Regelventils voneinander getrennt sind; in gleicher Weise kann anstelle der Scheibenkupplung 2 eine andere, bei derartigen Kupplungen geeignete Konstruktion verwendet werden.Since the area of the control valve receiving the channel 23 and the check valve 26 is exposed to relatively high temperatures, a heat-resistant seal 45, which is shown in FIGS. 2 and 3, is located between the housing receiving the channel 23 and the housing receiving the vent valve 38. This enables the valve arrangement to manufacture from pressure regulator and vent valve in a structural unit and to connect to the compressor or the cylinder head of the same without additional aids. However, the invention is also implemented in the context of an arrangement in which the individual parts of the control valve are separated from one another; in the same way, instead of the disk clutch 2, another construction suitable for such clutches can be used.

BezugszeichenlisteReference symbol list

  • 1 Druckfeder1 compression spring
  • 2 Scheibenkupplung2 disc clutch
  • 3 Antrieb3 drive
  • 4 Eingangsteil4 entrance part
  • 5 Abtrieb5 downforce
  • 6 Hülse6 sleeve
  • 7 Druckplatte7 pressure plate
  • 8 Druckbolzen8 pressure bolts
  • 9 Zwischenring9 intermediate ring
  • 10 Wälzlager10 rolling bearings
  • 11 Ausnehmung11 recess
  • 12 Ringraum12 annulus
  • 13 Dichtungsring13 sealing ring
  • 14 Kanal14 channel
  • 15 Steuerleitung15 control line
  • 16 Regelventil16 control valve
  • 17 Stopfen17 plugs
  • 18 Wälzlager18 rolling bearings
  • 19 Ausgangsteil19 output part
  • 20 Zwischenring20 intermediate ring
  • 21 Anschluß21 connection
  • 22 Druckstutzen22 discharge nozzle
  • 23 Kanal23 channel
  • 24 Druckanschluß24 pressure connection
  • 25 Ventilsitz25 valve seat
  • 26 Rückschlagventil26 check valve
  • 27 Kanal27 channel
  • 28 Kanal28 channel
  • 29 Kammer29 chamber
  • 30 Druckregler30 pressure regulator
  • 31 Reglerkolben31 regulator pistons
  • 32 Feder32 spring
  • 33 Ventilsitz33 valve seat
  • 34 Ringraum34 annulus
  • 35 Verbindung35 connection
  • 36 Anschluß36 connection
  • 37 Schaltkolben37 switching pistons
  • 38 Entlüftungsventil38 vent valve
  • 39 Dichtkörper39 sealing body
  • 40 Ventilsitz40 valve seat
  • 41 Entlüftungsleitung41 Vent line
  • 42 Anschluß42 connection
  • 43 Sauganschluß43 suction connection
  • 44 Ringkammer44 ring chamber
  • 45 Dichtung45 seal

Claims (6)

1. Ventilvorrichtung für eine pneumatisch gesteuerte Kompressor-Abschaltkupplung mit einer vom Druckraum des Kompressors zur Kupplung führenden Steuerleitung, deren Druck bei einer vorbestimmten Höhe die Kupplung auszurücken vermag, derart, daß der Kompressor bei weiterhin laufendem Antrieb zum Stillstand kommt und nach erneutem, druckabhängigen Einrücken der Kupplung wieder anläuft, gekennzeichnet durch eine in der Steuerleitungs-Verbindung befindliche Regelventileinrichtung mit einem bei einem vorbestimmten Abschaltdruck öffnenden Druckregler (30) und ein vom Druckregler (30) bei Erreichen des Abschaltdruckes betätigbares, den Druckraum des Kompressors entlüftendes Entlüftungsventil (38).1.Valve device for a pneumatically controlled compressor shut-off clutch with a control line leading from the pressure chamber of the compressor to the clutch, the pressure of which can disengage the clutch at a predetermined height, such that the compressor comes to a standstill while the drive is still running and after renewed, pressure-dependent engagement the clutch starts again, characterized by a control valve device in the control line connection with a pressure regulator (30) opening at a predetermined cut-off pressure and a vent valve (38) which can be actuated by the pressure regulator (30) when the cut-off pressure is reached and bleeds the pressure chamber of the compressor. 2. Ventilvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sich das Entlüftungsventil (38) in einer Verbindung zwischen dem Druckraum des Kompressors und dem Sauganschluß (43) des Kompressors befindet.2. Valve device according to claim 1, characterized in that the vent valve (38) is in a connection between the pressure chamber of the compressor and the suction port (43) of the compressor. 3. Ventilvorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das Entlüftungsventil (38) einen durch eine Feder und durch den Druck im Druckraum des Kompressors gegenüber einem Ventilsitz (40) verspannten Dichtkörper (39) aufweist, an dessen bezüglich der Feder entgegengesetzten Seite ein Schaltkolben (37) in öffnungsrichtung einwirkt, und daß der Schaltkolben des Entlüftungsventils (38) von dem in der Steuerleitung (15) herrschenden, über den Druckregler (30) eingespeisten Druck beaufschlagt ist.3. Valve device according to claim 2, characterized in that the vent valve (38) by a spring and by the pressure in the pressure chamber of the compressor against a valve seat (40) clamped seal Body (39), on the opposite side of the spring, a switching piston (37) acts in the opening direction, and that the switching piston of the vent valve (38) from the prevailing in the control line (15), via the pressure regulator (30) fed pressure is. 4. Ventilvorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß an der bezüglich der Feder des Entlüftungsventils (38) entgegengesetzten Seite des Dichtkörpers (39) eine Entlüftungsleitung (41) abzweigt, welche mit dem an den Sauganschluß (43) angeschlossenen Saugraum des Kompressors verbunden ist.4. Valve device according to claim 3, characterized in that on the opposite side of the sealing body (39) with respect to the spring of the vent valve (39) branches off a vent line (41) which is connected to the suction chamber (43) connected to the suction chamber of the compressor . 5. Ventilvorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Entlüftungsventil (38) und der Druckregler (30) in einem gemeinsamen Gehäuse gelagert sind, welches unter Zwischenschaltung einer wärmeisolierenden Dichtung mit dem den Druckanschluß des Kompressors enthaltenden Gehäuse verbunden ist.5. Valve device according to one of the preceding claims, characterized in that the vent valve (38) and the pressure regulator (30) are mounted in a common housing which is connected with the interposition of a heat-insulating seal with the housing containing the pressure connection of the compressor. 6. Ventilvorrichtung nach einem der vorangehenden Ansprüche, gekennzeichnet durch ein im Druckauslaß des Kompressors angeordnetes Rückschlagventil (26), von welchem strömungsaufwärts der zum Entlüftungsventil führende Kanal (27) abzweigt und von welchem strömungsabwärts der zum Druckregler (30) führende Kanal (28) abzweigt.6. Valve device according to one of the preceding claims, characterized by a check valve (26) arranged in the pressure outlet of the compressor, from which upstream the duct leading to the vent valve (27) branches off and from which downstream the duct (28) leading to the pressure regulator (30) branches .
EP81108403A 1980-11-07 1981-10-16 A pneumatically controlled compressor idling clutch having a valve arrangement Expired EP0051760B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108403T ATE5346T1 (en) 1980-11-07 1981-10-16 PNEUMATICALLY CONTROLLED COMPRESSOR SHUT-OFF CLUTCH WITH A VALVE DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803042069 DE3042069A1 (en) 1980-11-07 1980-11-07 VALVE DEVICE FOR A PNEUMATICALLY CONTROLLED COMPRESSOR SHUT-OFF COUPLING
DE3042069 1980-11-07

Publications (2)

Publication Number Publication Date
EP0051760A1 true EP0051760A1 (en) 1982-05-19
EP0051760B1 EP0051760B1 (en) 1983-11-16

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Application Number Title Priority Date Filing Date
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Country Status (4)

Country Link
EP (1) EP0051760B1 (en)
AT (1) ATE5346T1 (en)
DE (2) DE3042069A1 (en)
NO (1) NO813764L (en)

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EP0147063A1 (en) * 1983-11-29 1985-07-03 Bendix Limited Compressor - clutch assembly
GB2163223A (en) * 1984-07-07 1986-02-19 Bendix Ltd Multi-plate clutch in compressor assembly
GB2182732A (en) * 1985-11-07 1987-05-20 Bendix Ltd Clutch-driven compressor assembly
EP0238336A1 (en) * 1986-03-20 1987-09-23 Bendix Limited Gas compressor assemblies
EP0240278A2 (en) * 1986-04-01 1987-10-07 Bendix Limited Improvements relating to gas compressors
EP2425135B2 (en) † 2009-04-28 2017-08-02 WABCO GmbH Compressor and clutch device
US10662984B2 (en) 2015-11-02 2020-05-26 Knorr-Bremse Systems Für Schienenfahrzeuge Gmbh Compressed air preparation device and method for operating same

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DE3148717A1 (en) * 1981-12-09 1983-07-21 Robert Bosch Gmbh, 7000 Stuttgart Starting control device for a compressor
DE102016201208B4 (en) * 2016-01-27 2024-01-11 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Piston compressor with ventilation device
CN107288843A (en) * 2017-07-21 2017-10-24 凤阳汇通压缩机制造有限公司 A kind of vertical single-driving type natural gas recycle compressor

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DE1403953A1 (en) * 1962-07-06 1968-11-21 Atlas Copco Ab Reciprocating compressors
DE2704754A1 (en) * 1977-02-04 1978-08-17 Speck Kolbenpumpen Fabrik VALVE ARRANGEMENT

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1403953A1 (en) * 1962-07-06 1968-11-21 Atlas Copco Ab Reciprocating compressors
DE2704754A1 (en) * 1977-02-04 1978-08-17 Speck Kolbenpumpen Fabrik VALVE ARRANGEMENT

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122015A1 (en) * 1983-03-12 1984-10-17 Grau Limited Air compressor
US4561827A (en) * 1983-03-12 1985-12-31 Lucas Industries Limited Air compressor having condition responsive clutch control
EP0147063A1 (en) * 1983-11-29 1985-07-03 Bendix Limited Compressor - clutch assembly
GB2163223A (en) * 1984-07-07 1986-02-19 Bendix Ltd Multi-plate clutch in compressor assembly
GB2182732A (en) * 1985-11-07 1987-05-20 Bendix Ltd Clutch-driven compressor assembly
EP0238336A1 (en) * 1986-03-20 1987-09-23 Bendix Limited Gas compressor assemblies
EP0240278A2 (en) * 1986-04-01 1987-10-07 Bendix Limited Improvements relating to gas compressors
EP0240278A3 (en) * 1986-04-01 1989-08-30 Bendix Limited Improvements relating to gas compressors
EP2425135B2 (en) † 2009-04-28 2017-08-02 WABCO GmbH Compressor and clutch device
US10662984B2 (en) 2015-11-02 2020-05-26 Knorr-Bremse Systems Für Schienenfahrzeuge Gmbh Compressed air preparation device and method for operating same

Also Published As

Publication number Publication date
ATE5346T1 (en) 1983-12-15
DE3161439D1 (en) 1983-12-22
NO813764L (en) 1982-05-10
EP0051760B1 (en) 1983-11-16
DE3042069A1 (en) 1982-06-16

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