EP0109480A1 - Arrangement for interrupting the delivery of a piston compressor - Google Patents

Arrangement for interrupting the delivery of a piston compressor Download PDF

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Publication number
EP0109480A1
EP0109480A1 EP83105603A EP83105603A EP0109480A1 EP 0109480 A1 EP0109480 A1 EP 0109480A1 EP 83105603 A EP83105603 A EP 83105603A EP 83105603 A EP83105603 A EP 83105603A EP 0109480 A1 EP0109480 A1 EP 0109480A1
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EP
European Patent Office
Prior art keywords
piston
compressor
pressure medium
compressor piston
actuating plunger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83105603A
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German (de)
French (fr)
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EP0109480B1 (en
Inventor
Arno Christoleit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wabco Westinghouse Fahrzeugbremsen GmbH
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Wabco Westinghouse Fahrzeugbremsen GmbH
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Priority to AT83105603T priority Critical patent/ATE21730T1/en
Publication of EP0109480A1 publication Critical patent/EP0109480A1/en
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Publication of EP0109480B1 publication Critical patent/EP0109480B1/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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0437—Disconnecting the pistons from the actuated cam
    • 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
    • F04B49/12—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 varying the length of stroke of the working members
    • F04B49/121—Lost-motion device in the driving mechanism
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • the invention relates to a device for interrupting the delivery of a reciprocating compressor according to the preamble of claim 1.
  • the drive device for such reciprocating compressors is e.g. a camshaft on which the actuating plunger of the compressor piston rests under the action of the force of a return spring.
  • the cam driving the actuating plunger can therefore only drive the actuating plunger in the compression direction of the compressor piston. After the compression process, the compressor piston is moved in the suction direction by the force of the return spring.
  • the invention is therefore based on the object of providing a device of the type mentioned at the outset which, with simple means and in a safe manner, enables the delivery to be interrupted and thus the piston compressor to come to a standstill.
  • the invention includes the advantage that the reciprocating compressor can be installed in a simple manner in a pressure medium generating system, in which case the pressure medium conveyed by the reciprocating compressor can serve to automatically stop the reciprocating compressor after a predetermined pressure has been reached.
  • the pressure medium conveyed by the reciprocating compressor can serve to automatically stop the reciprocating compressor after a predetermined pressure has been reached.
  • the drawing shows a reciprocating compressor for generating compressed air.
  • the reciprocating compressor essentially consists of a cylinder tube 6, a compressor piston 8, which is sealed in this cylinder tube 6, and a cylinder head with a valve device.
  • the cylinder head in turn consists of a cylinder head cover 14 and a valve support plate 9 arranged between the cylinder head cover 14 and the cylinder tube 6 with a suction valve 18 and a pressure valve 13.
  • the reciprocating compressor described is attached to a motor housing 23 of an internal combustion engine, not shown.
  • the compressor piston 8 On the side facing away from the compression chamber 15, the compressor piston 8 is provided with a piston rod serving as an actuating plunger 22.
  • the actuating plunger 22 in turn serves to drive the compressor piston 8.
  • the compression chamber 15 is connected to the atmosphere via the suction valve 18, a bore 16 in the valve support plate 9 and an inlet bore 17 of the cylinder head cover 14. If necessary, the inlet bore 17 can be preceded by an air cleaning filter (not shown).
  • the compression chamber 15 is also connected via a bore 12 of the valve support plate 9, the pressure valve 13 and an outlet bore 11 of the cylinder head cover 14 to a compressed air circuit, which is symbolically represented by a compressed air reservoir 10.
  • an oscillating drive device which e.g. camshaft 27 driven by an internal combustion engine with a cam 1.
  • a compression spring 2 serving as a restoring force is provided, which is arranged between the cylinder tube 6 and a spring plate 25 fastened to the actuating plunger 22 by means of a locking ring 26.
  • the actuating plunger 22 is pressed against the cam 1, so that the compressor piston 8 exerts an oscillating movement when the camshaft 27 rotates.
  • the chamber lying on the side of the compressor piston 8 facing away from the compression chamber 15 is connected to the atmosphere via a bore 24, so that this chamber can be easily ventilated and ventilated when the compressor piston 8 moves.
  • auxiliary piston 4 which surrounds the actuating plunger 22 and is annular and surrounds the actuating plunger 22.
  • a guide tube 5 which is attached to the cylinder housing and serves to guide the actuating plunger 22.
  • a control chamber 21 delimited by the auxiliary piston 4, which can be acted upon by a control pressure medium via a control input 3.
  • the effective area of the auxiliary piston 4 acted on by the control pressure medium and the pressure of the control pressure medium are dimensioned such that the compressor piston 8 is held securely by the auxiliary piston 4 in its top dead center as long as the control chamber 21 is acted upon by the control pressure medium .
  • the compressor piston 8 is not moved, i.e. there is no wear due to piston movement.
  • the camshaft 27 is relieved of the forces acting on it when conveying compressed air.
  • the stop 20 is designed to be correspondingly short, or a stop 7 is provided on the compressor piston 8 or on the actuating plunger 22 which is connected to the guide tube 5 or a corresponding other counter-stop of the cylinder housing comes to rest before the compressor piston 8 strikes the auxiliary piston 4.
  • a pressure control device To control the pressure prevailing in the reservoir 10 is a pressure control device, not shown provided with a pressure regulator.
  • the changeover signal of the pressure regulator when the predetermined pressure in the reservoir 10 is reached is used to control the control pressure medium for the auxiliary piston 4.
  • the reciprocating compressor after reaching the desired pressure in the reservoir 10 automatically by stopping the compressor piston 8 in his top dead center switched off. If the pressure mentioned in the reservoir 10 drops, the control chamber 21 is vented by switching the pressure regulator mentioned, so that compressed air is then replenished.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

A reciprocating piston compressor which is driven by a rotating camshaft and cam. An auxiliary piston is located below the compression piston. The auxiliary piston is movable by a regulated control pressure against the compression piston so that the compression piston is stopped at its top dead center position. Thus, the reciprocating piston compressor is disabled since the compression piston is no longer driven by the rotating camshaft and cam.

Description

Die Erfindung bezieht sich auf eine Einrichtung zum Unterbrechen der Förderung eines Hubkolben-Verdichters gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for interrupting the delivery of a reciprocating compressor according to the preamble of claim 1.

Als Antriebseinrichtung für derartige Hubkolben-Verdichter dient z.B. eine Nockenwelle, an der der Betätigungsstössel des Verdichter-Kolbens unter der Einwirkung der Kraft einer Rückstellfeder anliegt. Die den Betätigungsstössel antreibende Nocke kann den Betätigungsstössel also nur in Verdichtungs-Richtung des Verdichter-Kolbens antreiben. Nach dem Verichtungs-Vorgang wird der Verdichter-Kolben von der Kraft der Rückstellfeder in Ansaug-Richtung bewegt.The drive device for such reciprocating compressors is e.g. a camshaft on which the actuating plunger of the compressor piston rests under the action of the force of a return spring. The cam driving the actuating plunger can therefore only drive the actuating plunger in the compression direction of the compressor piston. After the compression process, the compressor piston is moved in the suction direction by the force of the return spring.

Wenn ein derartiger Hubkolben-Verdichter z.B. in einer Druckluft-Erzeugungsanlage zum Komprimieren von Luft dient, dann ist es sinnvoll, den Hubkolben-Verdichter nach Erreichen des in der Druckluftanlage gewünschten Druckes nicht weiter unter Last laufen zu lassen. So kann man daran denken, die vom Hubkolben-Verdichter geförderte Druckluft nach Erreichen des gewünschten Druckes in einer entsprechenden Druckregel-Ventileinrichtung ins Freie strömen zu lassen. Da bei dieser Lösung der Hubkolben-Verdichter jedoch in dem beschriebenen Leerlauf weiterläuft und somit einem nicht zu vernachlässigenden Verschleiß unterliegt, besteht das Bedürfnis, den Hubkolben-Verdichter während der Leerlauf-Zeit ganz abzuschalten.If such a reciprocating compressor is used, for example, in a compressed air generation system to compress air, then it makes sense not to let the reciprocating compressor continue to run under load after reaching the pressure desired in the compressed air system. So you can remember to let the compressed air delivered by the reciprocating compressor flow into the outside after reaching the desired pressure in a corresponding pressure control valve device. However, since in this solution the reciprocating compressor continues to run in the idling mode described and is therefore subject to not negligible wear, there is a need to switch off the reciprocating compressor completely during the idling period.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Einrichtung der eingangs genannten Art zu schaffen, die mit einfachen Mitteln und auf sichere Weise eine Unterbrechung der Förderung und damit einen Stillstand des Hubkolben-Verdichters ermöglicht.The invention is therefore based on the object of providing a device of the type mentioned at the outset which, with simple means and in a safe manner, enables the delivery to be interrupted and thus the piston compressor to come to a standstill.

Diese Aufgabe wird durch die im Patentanspruch 1 angegebene Erfindung gelöst.This object is achieved by the invention specified in claim 1.

Die Erfindung weist u.a. den Vorteil auf, daß der Hubkolben-Verdichter auf einfache Weise in eine Druckmittel-Erzeugungsanlage eingebaut werden kann, wobei dann das vom Hubkolber-Verdichter geförderte Druckmittel nach dem Erreichen eines vorgegebenen Druckes zum automatischen Stillsetzen des Hubkolben-Verdichters dienen kann. Durch die Wahl des Druckes des Steuer-Druckmittels. bzw. der vom Steuer-Druckmittel beaufschlagten Wirkfläche des Hilfskolbens ist es leicht möglich, die gewünschte Kraft zum Festsetzen des Verdichter-Kolbens aufzubringen.The invention includes the advantage that the reciprocating compressor can be installed in a simple manner in a pressure medium generating system, in which case the pressure medium conveyed by the reciprocating compressor can serve to automatically stop the reciprocating compressor after a predetermined pressure has been reached. By choosing the pressure of the control pressure medium. or the effective area of the auxiliary piston acted upon by the control pressure medium, it is easily possible to apply the desired force for fixing the compressor piston.

Weiterbildungen und vorteilhafte Ausführungsformen der Erfindung sind in den Unteransprüchen angegeben.Further developments and advantageous embodiments of the invention are specified in the subclaims.

Die Erfindung wird anhand eines Ausführungsbeispiels, das in der Zeichnung dargestellt ist, näher erläutert.The invention is explained in more detail using an exemplary embodiment which is illustrated in the drawing.

Die Zeichnung zeigt einen Hubkolben-Verdichter zur Erzeugung von Druckluft. Der Hubkolben-Verdichter besteht im wesentlichen aus einem Zylinderrohr 6, einem in diesem Zylinderrohr 6 abgedichtet geführten Verdichter-Kolben 8 sowie einem Zylinderkopf mit einer Ventileinrichtung. Der Zylinderkopf besteht seinerseits aus einem Zylinderkopfdeckel 14 und einer zwischen dem Zylinderkopfdeckel 14 und dem Zylinderrohr 6 angeordneten Ventilträgerplatte 9 mit einem Saugventil 18 und einem Druckventil 13. Der beschriebene Hubkolben-Verdichter ist an einem Motorgehäuse 23 einer nicht dargestellten Brennkraftmaschine befestigt.The drawing shows a reciprocating compressor for generating compressed air. The reciprocating compressor essentially consists of a cylinder tube 6, a compressor piston 8, which is sealed in this cylinder tube 6, and a cylinder head with a valve device. The cylinder head in turn consists of a cylinder head cover 14 and a valve support plate 9 arranged between the cylinder head cover 14 and the cylinder tube 6 with a suction valve 18 and a pressure valve 13. The reciprocating compressor described is attached to a motor housing 23 of an internal combustion engine, not shown.

Der in einer Bohrung 19 des Zylinderrohrs 6 geführte Verdichter-Kolben 8 begrenzt einen Verdichtungsraum 15. Auf der dem Verdichtungsraum 15 abgewandten Seite ist der Verdichter-Kolben 8 mit einer als Betätigungsstössel 22 dienenden Kolbenstange versehen. Der Betätigungsstössel 22 seinerseits dient zum Antrieb des Verdichter-Kolbens 8.The compressor piston 8 guided in a bore 19 of the cylinder tube 6 delimits a compression chamber 15. On the side facing away from the compression chamber 15, the compressor piston 8 is provided with a piston rod serving as an actuating plunger 22. The actuating plunger 22 in turn serves to drive the compressor piston 8.

Der Verdichtungsraum 15 ist über das Saugventil 18, eine Bohrung 16 in der Ventilträgerplatte 9 und eine Einlaßbohrung 17 des Zylinderkopfdeckels 14 an die Atmosphäre angeschlossen. Bei Bedarf kann der Einlaßbohrung 17 ein nicht dargestellter Luftreinigungs-Filter vorgeschaltet werden. Der Verdichtungsraum 15 ist ferner über eine Bohrung 12 der Ventilträgerplatte 9, das Druckventil 13 und eine Auslaßbohrung 11 des Zylinderkopfdeckels 14 mit einem Druckluftkreis verbunden, der symbolisch durch einen Druckluft-Vorratsbehälter 10 dargestellt ist.The compression chamber 15 is connected to the atmosphere via the suction valve 18, a bore 16 in the valve support plate 9 and an inlet bore 17 of the cylinder head cover 14. If necessary, the inlet bore 17 can be preceded by an air cleaning filter (not shown). The compression chamber 15 is also connected via a bore 12 of the valve support plate 9, the pressure valve 13 and an outlet bore 11 of the cylinder head cover 14 to a compressed air circuit, which is symbolically represented by a compressed air reservoir 10.

Bei einer Bewegung des Verdichter-Kolbens 8 nach unten, d.h. in Ansaug-Richtung wird über die Einlaßbohrung 17 und das dann geöffnete Saugventil 18 Luft in den Verdichtungsraum 15 gesaugt. Bei einer anschließenden Bewegung des Verdichter-Kolbens 8 nach oben, d.h. in Verdichtungs-Richtung-, wird das Saugventil 18 automatisch geschlossen. Die dann komprimierte Druckluft gelangt über das sich unter dem Druck der Druckluft automatisch öffnende Druckventil 13 und die Auslaßbohrung 11 in den Vorratsbehälter 10.When the compressor piston 8 moves downward, ie in the suction direction, air is sucked into the compression chamber 15 via the inlet bore 17 and the suction valve 18 then opened. With a subsequent movement of the compressor piston 8 upwards, ie in the compression direction, the suction valve 18 is automatically closed. The compressed air then passes through the under the pressure of the Compressed air automatically opening pressure valve 13 and the outlet bore 11 in the reservoir 10th

Zur Erzeugung der erwähnten Bewegungen des Verdichter-Kolbens 8 in Verdichtungs-Richtung ist eine oszillierende Antriebseinrichtung vorgesehen, die eine z.B. von einer Brennkraftmaschine angetriebene Nockenwelle 27 mit einer Nocke 1 umfaßt. Zur Erzeugung der Bewegung des Verdichter-Kolbens 8 in Ansaug-Richtung ist eine als Rückstellkraft dienende Druckfeder 2 vorgesehen, die zwischen dem Zylinderrohr 6 und einem am Betätigungsstössel 22 mittels eines Sicherungsringes 26 befestigten Federteller 25 angeordnet ist. Unter der Kraft der Druckfeder 2 wird der Betätigungsstössel 22 gegen die Nocke 1 gedrückt, so daß der Verdichter-Kolben 8 bei einer Drehbewegung der Nockenwelle 27 eine oszillierende Bewegung ausübt. Die auf der dem Verdichtungsraum 15 abgewandten Seite des Verdichter-Kolbens 8 liegende Kammer ist über eine Bohrung 24 mit der Atmosphäre verbunden, so daß diese Kammer problemlos ent- und belüftet werden kann, wenn sich der Verdichter-Kolben 8 bewegt.To generate the above-mentioned movements of the compressor piston 8 in the compression direction, an oscillating drive device is provided, which e.g. camshaft 27 driven by an internal combustion engine with a cam 1. To generate the movement of the compressor piston 8 in the suction direction, a compression spring 2 serving as a restoring force is provided, which is arranged between the cylinder tube 6 and a spring plate 25 fastened to the actuating plunger 22 by means of a locking ring 26. Under the force of the compression spring 2, the actuating plunger 22 is pressed against the cam 1, so that the compressor piston 8 exerts an oscillating movement when the camshaft 27 rotates. The chamber lying on the side of the compressor piston 8 facing away from the compression chamber 15 is connected to the atmosphere via a bore 24, so that this chamber can be easily ventilated and ventilated when the compressor piston 8 moves.

In der Bohrung 19 des Zylinderrohres 6 auf der dem Verdichtungsraum 15 abgewandten Seite des Verdichter-Kolbens 8 ist ein den Betätigungsstössel 22 umgebender abgedichtet geführter Hilfskolben 4 vorgesehen, der ringförmig ausgebildet ist und den Betätigungsstössel 22 umgibt. Zwischen dem Hilfskolben 4 und dem Betätigungsstössel 22 befindet sich ein Führungsrohr 5, das am Zylindergehäuse befestigt ist und zur Führung des Betätigungsstössels 22 dient. Unterhalb des Hilfskolbens 4 befindet sich eine vom Hilfskolben 4 begrenzte Steuerkammer 21, die über einen Steuereingang 3 mit einem Steuer-Druckmittel beaufschlagt werden kann.Provided in the bore 19 of the cylinder tube 6 on the side of the compressor piston 8 facing away from the compression chamber 15 is a sealingly guided auxiliary piston 4 which surrounds the actuating plunger 22 and is annular and surrounds the actuating plunger 22. Between the auxiliary piston 4 and the actuating plunger 22 there is a guide tube 5 which is attached to the cylinder housing and serves to guide the actuating plunger 22. Below the auxiliary piston 4 is a control chamber 21 delimited by the auxiliary piston 4, which can be acted upon by a control pressure medium via a control input 3.

Wenn die Steuerkammer 21 mit einem Steuer-Druckmittel, im vorliegenden Fall ist dies Druckluft, beaufschlagt wird, bewegt sich der Hilfskolben 4 nach oben auf den Verdichter-Kolben 8 zu. Dabei legt sich dann ein am Hilfskolben 4 befestigter, den Betätigungsstössel 22 und das Führungsrohr 5 umgebender hülsenförmiger Anschlag 20 an den Verdichter-Kolben 8 an und bewegt diesen gegen die Kraft der Druckfeder 2 nach oben in Verdichtungs-Richtung, bis der Verdichter-Kolben 8 den dem Verdichtungs-Vorgang entsprechenden Totpunkt, d.h. den oberen Totpunkt erreicht.When a control pressure medium, in the present case this is compressed air, is applied to the control chamber 21, the auxiliary piston 4 moves upward towards the compressor piston 8. This then places itself on the auxiliary piston 4 strengthened, the actuating plunger 22 and the guide tube 5 surrounding sleeve-shaped stop 20 on the compressor piston 8 and moves it against the force of the compression spring 2 upwards in the compression direction until the compressor piston 8 reaches the dead center corresponding to the compression process, ie top dead center.

Die vom Steuer-Druckmittel beaufschlagte Wirkfläche des Hilfskolbens 4 sowie der Druck des Steuer-Druckmittels sind so bemessen, daß der Verdichter-Kolben 8 vom Hilfskolben 4 sicher solange in seinem oberen Totpunkt festgehalten wird, wie die Steuerkammer 21 mit dem Steuer-Druckmittel beaufschlagt ist. Dies bedeutet, daß der Hubkolben-Verdichter, während dieser Zeit abgeschaltet ist und keine Druckluft mehr fördern kann. Es wird während dieser Zeit, in der die Druckluft-Förderung unterbrochen ist, auch nicht der Verdichter-Kolben 8 bewegt, d.h. es tritt kein Verschleiß durch eine Kolben-Bewegung auf. Zusätzlich ist die Nockenwelle 27 von den bei Druckluft-Förderung auf sie einwirkenden Kräften entlastet.The effective area of the auxiliary piston 4 acted on by the control pressure medium and the pressure of the control pressure medium are dimensioned such that the compressor piston 8 is held securely by the auxiliary piston 4 in its top dead center as long as the control chamber 21 is acted upon by the control pressure medium . This means that the reciprocating compressor is switched off during this time and can no longer convey compressed air. During this time, in which the compressed air supply is interrupted, the compressor piston 8 is not moved, i.e. there is no wear due to piston movement. In addition, the camshaft 27 is relieved of the forces acting on it when conveying compressed air.

Nach dem Entlüften der Steuerkammer 21 wird der Verdichter-Kolben 8 und damit der Hilfskolben 4 durch die Kraft der Druckfeder 2 wieder nach unten bewegt. Damit wird dann der Verdichter-Kolben 8 wieder von der Nockenwelle 27 zwecks Förderung von Druckluft angetrieben.After the control chamber 21 has been vented, the compressor piston 8 and thus the auxiliary piston 4 are moved down again by the force of the compression spring 2. The compressor piston 8 is then driven again by the camshaft 27 for the purpose of conveying compressed air.

Um zu verhindern, daß der Verdichter-Kolben 8 in seinem unteren Totpunkt an dem Hilfskolben 4 anschlägt, ist der Anschlag 20 entsprechend kurz ausgebildet oder es ist ein Anschlag 7 am Verdichter-Kolben 8 oder am Betätigungsstössel 22 vorgesehen, der an dem Führungsrohr 5 oder einem entsprechenden anderen Gegen-Anschlag des Zylindergehäuses zur Anlage kommt, bevor der Verdichter-Kolben 8 an dem Hilfskolben 4 anschlägt.In order to prevent the compressor piston 8 from striking the auxiliary piston 4 at its bottom dead center, the stop 20 is designed to be correspondingly short, or a stop 7 is provided on the compressor piston 8 or on the actuating plunger 22 which is connected to the guide tube 5 or a corresponding other counter-stop of the cylinder housing comes to rest before the compressor piston 8 strikes the auxiliary piston 4.

Zur Regelung des in dem Vorratsbehälter 10 herrschenden Druckes ist eine nicht dargestellte Druckregeleinrichtung mit einem Druckregler vorgesehen. Das Umschaltsignal des Druckreglers bei Erreichen des vorgegebenen Druckes im Vorratsbehälter 10 dient zur Steuerung des Steuer-Druckmittels für den Hilfskolben 4. Auf diese Weise wird der Hubkolben-Verdichter nach Erreichen des gewünschten Druckes im Vorratsbehälter 10 automatisch durch Stillsetzen des Verdichter-Kolbens 8 in seinem oberen Totpunkt ausgeschaltet. Wenn der erwähnte Druck im Vorratsbehälter 10 sinkt, wird die Steuerkammer 21 durch das Umschalten des erwähnten Druckreglers entlüftet, so daß dann wieder Druckluft nachgespeist wird.To control the pressure prevailing in the reservoir 10 is a pressure control device, not shown provided with a pressure regulator. The changeover signal of the pressure regulator when the predetermined pressure in the reservoir 10 is reached is used to control the control pressure medium for the auxiliary piston 4. In this way, the reciprocating compressor after reaching the desired pressure in the reservoir 10 automatically by stopping the compressor piston 8 in his top dead center switched off. If the pressure mentioned in the reservoir 10 drops, the control chamber 21 is vented by switching the pressure regulator mentioned, so that compressed air is then replenished.

Claims (9)

1. Einrichtung zum Unterbrechen der Förderung eines Hubkolben-Verdichters, der folgende Merkmale aufweist: a) Zum Antrieb des in einem Zylinder (6) geführten Verdichter-Kolbens (8) ist ein Betätigungsstössel (22) vorgesehen; b) zum Antrieb des Verdichter-Kolbens (8) in Verdichtungs-Richtung ist eine auf den Betätigungsstössel (22) wirkende oszillierende Antriebseinrichtung (1, 27) vorgesehen; c) zum Antrieb des Verdichtungs-Kolbens (8) in Ansaug-Richtung ist eine federnde Rückstellkraft (2) vorge= sehen;
gekennzeichnet durch folgende Merkmale: d) es ist ein von einem Steuer-Druckmittel beaufschlagbarer Hilfskolben (4) vorgesehen, der zum Festsetzen des Verdichter-Kolbens (8) im Bereich des dem Verdichtungs-Vorgang entsprechenden Totpunktes dient; e) der auf den Verdichter-Kolben (8) und/oder den Be-Betätigungsstössel(22) wirkende Hilfskolben (4) ist auf der dein Verdichtungsraum (15) abgewandten Seite des Verdichter-Kolbens (8) angeordnet. 1. Device for interrupting the delivery of a reciprocating compressor, which has the following features: a) An actuating plunger (22) is provided for driving the compressor piston (8) guided in a cylinder (6); b) for driving the compressor piston (8) in the compression direction, an oscillating drive device (1, 27) acting on the actuating plunger (22) is provided; c) for driving the compression piston (8) in the suction direction, a resilient restoring force (2) is provided = see;
characterized by the following features: d) there is provided an auxiliary piston (4) which can be acted upon by a control pressure medium and which serves to fix the compressor piston (8) in the region of the dead center corresponding to the compression process; e) the auxiliary piston (4) acting on the compressor piston (8) and / or the actuating tappet (22) is arranged on the side of the compressor piston (8) facing away from the compression chamber (15). 2. Einrichtung nach Anspruch-1, dadurch gekennzeichnet, daß der Hilfskolben (4) in.der den Verdichter-Kolben (8) aufnehmenden Zylinderkammer angeordnet ist.2. Device according to claim 1, characterized in that the auxiliary piston (4) is arranged in the cylinder chamber which accommodates the compressor piston (8). 3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Hilfskolben (4) als Ringkolben ausgebildet ist, der den Betätigungsstössel (22) umgibt.3. Device according to claim 1 or 2, characterized in that the auxiliary piston (4) is designed as an annular piston which surrounds the actuating plunger (22). 4. Einrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Hilfskolben (4) einen den Betätigungsstössel (22) umgebenden rohrförmigen Anschlag (20) für den Verdichter-Kolben (8) aufweist.4. Device according to at least one of the preceding claims, characterized in that the auxiliary piston (4) has a tubular stop (20) surrounding the actuating plunger (22) for the compressor piston (8). 5. Einrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwischen dem Hilfskolben (4) und dem Betätigungsstössel (22) ein Führungsrohr (5) für den Betätigungsstössel (22) vorgesehen ist.5. Device according to at least one of the preceding claims, characterized in that a guide tube (5) for the actuating plunger (22) is provided between the auxiliary piston (4) and the actuating plunger (22). 6. Einrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als federnde Rückstellkraft eine zwischen dem Verdichtergehäuse (6) und dem Betätigungsstössel (22) angeordnete Druckfeder (2) angeordnet ist.6. Device according to at least one of the preceding claims, characterized in that between the compressor housing (6) and the actuating plunger (22) arranged compression spring (2) is arranged as a resilient restoring force. 7. Einrichtung nach wenigstens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß als Steuer-Druckmittel das von dem Verdichter-Kolben (8) geförderte Druckmittel dient.7. Device according to at least one of the preceding claims, characterized in that the pressure medium delivered by the compressor piston (8) serves as the control pressure medium. 8. Einrichtung nach wenigstens einem der vorhergehenden Ansprüche, gekennzeichnet durch folgende Merkmale: a) Das von dem Verdichter-Kolben (8) geförderte Druckmittel wird in einem Druckmittel-Speicher (10) gespeichert; b) zur Überwachung des im Druckmittel-Speicher (10) befindlichen Druckmittels ist ein Druckregler vorgesehen; c) das Umschaltsignal des Druckreglers bei Erreichen eines vorgegebenen Druckes im Druckmittel-Speicher (10) dient zur Steuerung des Steuer-Druckmittels für den Hilfskolben (4). 8. Device according to at least one of the preceding claims, characterized by the following features: a) The pressure medium delivered by the compressor piston (8) is stored in a pressure medium memory (10); b) a pressure regulator is provided for monitoring the pressure medium in the pressure medium store (10); c) the switching signal of the pressure regulator when a predetermined pressure in the pressure medium memory (10) is used to control the control pressure medium for the Auxiliary piston (4). 9. Einrichtung nach wenigstens einem der vorhergehenden Ansprüche, gekenzeichnet durch folgende Merkmale: a) Es ist ein Anschlag für den Verdichter-Kolben vorgesehen, an dem der Verdichter-Kolben (8) bei einer Bewegung in Ansaug-Richtung zur Anlage kommt; b) der Anschlag (7) ist so angeordnet, daß der Verdichter-Kolben (8) an dem in seiner Ausgangslage befindlichen Hilfskolben (4) nicht zur Anlage kommen kann. 9. Device according to at least one of the preceding claims, characterized by the following features: a) There is a stop for the compressor piston, on which the compressor piston (8) comes to rest when moving in the suction direction; b) the stop (7) is arranged so that the compressor piston (8) cannot come into contact with the auxiliary piston (4) in its starting position.
EP83105603A 1982-11-23 1983-06-08 Arrangement for interrupting the delivery of a piston compressor Expired EP0109480B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105603T ATE21730T1 (en) 1982-11-23 1983-06-08 DEVICE FOR INTERRUPTING THE DELIVERY OF A RECIPROCATING COMPRESSOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3243165 1982-11-23
DE19823243165 DE3243165A1 (en) 1982-11-23 1982-11-23 DEVICE FOR INTERRUPTING A PISTON COMPRESSOR

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EP0109480A1 true EP0109480A1 (en) 1984-05-30
EP0109480B1 EP0109480B1 (en) 1986-08-27

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US (1) US4515530A (en)
EP (1) EP0109480B1 (en)
JP (1) JPS5996489A (en)
AT (1) ATE21730T1 (en)
DE (2) DE3243165A1 (en)

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Also Published As

Publication number Publication date
US4515530A (en) 1985-05-07
JPH037027B2 (en) 1991-01-31
DE3365629D1 (en) 1986-10-02
ATE21730T1 (en) 1986-09-15
JPS5996489A (en) 1984-06-02
DE3243165A1 (en) 1984-05-24
EP0109480B1 (en) 1986-08-27

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