EP0051760B1 - Pneumatisch gesteuerte Kompressor-Abschaltkupplung mit einer Ventilvorrichtung - Google Patents

Pneumatisch gesteuerte Kompressor-Abschaltkupplung mit einer Ventilvorrichtung Download PDF

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Publication number
EP0051760B1
EP0051760B1 EP81108403A EP81108403A EP0051760B1 EP 0051760 B1 EP0051760 B1 EP 0051760B1 EP 81108403 A EP81108403 A EP 81108403A EP 81108403 A EP81108403 A EP 81108403A EP 0051760 B1 EP0051760 B1 EP 0051760B1
Authority
EP
European Patent Office
Prior art keywords
pressure
compressor
connection
coupling
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81108403A
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German (de)
English (en)
French (fr)
Other versions
EP0051760A1 (de
Inventor
Hans Unger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse AG
Original Assignee
Knorr Bremse AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Knorr Bremse AG filed Critical Knorr Bremse AG
Priority to AT81108403T priority Critical patent/ATE5346T1/de
Publication of EP0051760A1 publication Critical patent/EP0051760A1/de
Application granted granted Critical
Publication of EP0051760B1 publication Critical patent/EP0051760B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • 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 pneumatically controlled compressor shut-off clutch with a valve device according to the preamble of claim 1.
  • the pressure of the consumer supplied by the compressor is used in order to act, when a certain value is reached, as a shut-off pressure on sealingly displaceable actuating elements of a clutch which, during operation, drive the compressor with the output, i. H. connects to the drive or crankshaft of the compressor.
  • the cut-out 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 running and starts up after a certain time.
  • This start-up of the compressor takes place against considerable resistance, i. H. 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 it difficult to use in tight spaces, for example in a motor vehicle or the like.
  • a piston compressor is described in German Offenlegungsschrift 1 403 953, on which a relief valve 25 and a control valve 40 are used.
  • the control valve 40 is under the influence of the pressure in the container 16 in order to be able to act on the space 37 of the relief valve 25 via the control line 39 in such a way that the valve plate 29 can lift off its valve seat and the piston compressor is consequently relieved.
  • German Offenlegungsschrift 27 04 754 only a relief or short-circuit system for a compressor is shown, this publication by no means suggests that the switching pressure for the relief valve can be used simultaneously to actuate a clutch, with the proviso that this switching pressure leading line can be vented by means of a pressure regulator when the compressor starts to work again.
  • 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 ventilation is of particular advantage since the ventilation noise that normally occurs when ventilation is open is 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 a drive 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 penetrate 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 at 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 merges at the right end as shown 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 cap of the compressor and is connected via a control line 15 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 cap, 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 Between the disk clutch 2 and the compressor, a reduction gear or the like. Intermediate element can of course also be inserted in a manner not shown.
  • 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 is driven when the V-belt pulley shown as drive 3 rotates via the input part 4, the disk or disk set of the disk clutch 2 compressed by the compression springs 1, the output part 19 and the output 5 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 moved to the left against the force of the compression springs 1 via the intermediate ring 20 and the roller bearing 10, as well as 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, i. that is, the compressor stops when the drive 3 continues to rotate.
  • the control valve 16 connected to the control line 15 is connected to an on circuit 21 with the pressure port 22 of the compressor in connection, which in turn opens into the (not shown) pressure chamber.
  • the channel 23, which closes at the port 21 and penetrates the control valve, is connected to the consumer via the pressure port 24 and, if appropriate, 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. 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. 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 in the annular space 12 and thus on the sealing ring 13.
  • the pressure prevailing via 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 opens into the bore penetrated by the plunger of the sealing body 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 into 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.
  • 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 form of a « Lossless »pressure regulator designed, that is, when the regulator piston 31 is pressed sealingly against the valve seat 33 (by the tension of the spring 32), then the regulator piston provides a (not shown) vent in the area of the in Fig. 2 set screw of the pressure regulator free, and thereby a free ventilation connection to the annular space 12 of the disc clutch 2 is made.
  • 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 reduced consumer pressure, i. that is, the channel 27 is closed and is promoted normally when the compressor starts up via the channel 23, the check valve 26 and the pressure connection 24 (connected to the consumer).
  • 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.
  • 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.

Landscapes

  • 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)
EP81108403A 1980-11-07 1981-10-16 Pneumatisch gesteuerte Kompressor-Abschaltkupplung mit einer Ventilvorrichtung Expired EP0051760B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108403T ATE5346T1 (de) 1980-11-07 1981-10-16 Pneumatisch gesteuerte kompressorabschaltkupplung mit einer ventilvorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803042069 DE3042069A1 (de) 1980-11-07 1980-11-07 Ventilvorrichtung fuer eine pneumatisch gesteuerte kompressor-abschaltkupplung
DE3042069 1980-11-07

Publications (2)

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

Family

ID=6116228

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108403A Expired EP0051760B1 (de) 1980-11-07 1981-10-16 Pneumatisch gesteuerte Kompressor-Abschaltkupplung mit einer Ventilvorrichtung

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288843A (zh) * 2017-07-21 2017-10-24 凤阳汇通压缩机制造有限公司 一种立式单驱动式天然气循环压缩机

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3148717A1 (de) * 1981-12-09 1983-07-21 Robert Bosch Gmbh, 7000 Stuttgart Anlauf-regeleinrichtung fuer einen kompressor
EP0122015B1 (en) * 1983-03-12 1989-01-18 Grau Limited Air compressor
GB2150238B (en) * 1983-11-29 1987-04-23 Bendix Ltd Multi-plate clutch in compressor 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
GB2188108A (en) * 1986-03-20 1987-09-23 Bendix Ltd Clutch for air compressor assembly
GB2188682A (en) * 1986-04-01 1987-10-07 Bendix Ltd Unloader valve for compressor
DE102009018843A1 (de) † 2009-04-28 2010-11-04 Wabco Gmbh Kompressor und Kupplungseinrichtung
DE102015118744A1 (de) 2015-11-02 2017-05-04 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Druckluftaufbereitungseinrichtung und Verfahren zum Betreiben einer solchen
DE102016201208B4 (de) * 2016-01-27 2024-01-11 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Kolbenkompressor mit Entlüftungseinrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255954A (en) * 1962-07-06 1966-06-14 Atlas Copco Ab Positive displacement compressors
DE2704754A1 (de) * 1977-02-04 1978-08-17 Speck Kolbenpumpen Fabrik Ventilanordnung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288843A (zh) * 2017-07-21 2017-10-24 凤阳汇通压缩机制造有限公司 一种立式单驱动式天然气循环压缩机

Also Published As

Publication number Publication date
DE3161439D1 (en) 1983-12-22
NO813764L (no) 1982-05-10
EP0051760A1 (de) 1982-05-19
DE3042069A1 (de) 1982-06-16
ATE5346T1 (de) 1983-12-15

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