EP0907022A3 - Device for avoiding disturbing back expansion in a piston compressor - Google Patents

Device for avoiding disturbing back expansion in a piston compressor Download PDF

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Publication number
EP0907022A3
EP0907022A3 EP98117617A EP98117617A EP0907022A3 EP 0907022 A3 EP0907022 A3 EP 0907022A3 EP 98117617 A EP98117617 A EP 98117617A EP 98117617 A EP98117617 A EP 98117617A EP 0907022 A3 EP0907022 A3 EP 0907022A3
Authority
EP
European Patent Office
Prior art keywords
cam
piston
back expansion
valve
connecting rod
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.)
Withdrawn
Application number
EP98117617A
Other languages
German (de)
French (fr)
Other versions
EP0907022A2 (en
Inventor
Heribert Dipl.-Ing. Möller (FH)
Manfred Dipl.-Ing. Pister (Fh)
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.)
MAN Truck and Bus SE
Original Assignee
MAN Nutzfahrzeuge 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
Application filed by MAN Nutzfahrzeuge AG filed Critical MAN Nutzfahrzeuge AG
Publication of EP0907022A2 publication Critical patent/EP0907022A2/en
Publication of EP0907022A3 publication Critical patent/EP0907022A3/en
Withdrawn legal-status Critical Current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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

Die Erfindung bezieht sich auf eine Vorrichtung zur Vermeidung von Rückexpansion bei Kolbenverdichtern. Kolbenverdichter haben die Eigenschaft nach Überschreiten des Kolbens in OT-Stellung kurzzeitig ein negatives Drehmoment auszuüben, was sich bei Zahnradantrieb durch Zahnflankenschlagen bemerkbar macht. Erfindungsgemäß wird die Rückexpansion dadurch vermieden, daß in den Kolbenboden 8 ein Ventil 7 eingebaut ist, welches gegen die Kraft einer Druckfeder durch einen Nocken 9 geöffnet wird, wenn sich der Kolben 3 in OT-Stellung befindet. Der Nocken 9 ist dabei auf einer Nockenscheibe 10 angeordnet, welche drehfest mit dem Pleuelauge 11 der Pleuelstange 5 verbunden ist. Durch die Schwenkbewegung der Pleuelstange 5 wird die Nockenscheibe 10 gedreht und der Nocken 9 öffnet Ventil 7 im Bereich von OT und Druckluft kann aus dem Verdichtungsraum entweichen, so daß Rückexpansion und das daraus resultierende Getriebegeräusch vermieden wird.

Figure 00000001
The invention relates to a device for avoiding back expansion in reciprocating compressors. Piston compressors have the property of briefly exerting a negative torque after exceeding the piston in the TDC position, which is noticeable when the gear is driven by the flank of the teeth. According to the invention, the back expansion is avoided in that a valve 7 is installed in the piston crown 8, which valve is opened against the force of a compression spring by a cam 9 when the piston 3 is in the TDC position. The cam 9 is arranged on a cam disk 10 which is connected to the connecting rod eye 11 of the connecting rod 5 in a rotationally fixed manner. The pivoting movement of the connecting rod 5 rotates the cam disk 10 and the cam 9 opens the valve 7 in the region of TDC and compressed air can escape from the compression chamber, so that back expansion and the resulting transmission noise are avoided.
Figure 00000001
EP98117617A 1997-10-01 1998-09-17 Device for avoiding disturbing back expansion in a piston compressor Withdrawn EP0907022A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19743444 1997-10-01
DE1997143444 DE19743444C2 (en) 1997-10-01 1997-10-01 Device for avoiding back expansion in piston compressors

Publications (2)

Publication Number Publication Date
EP0907022A2 EP0907022A2 (en) 1999-04-07
EP0907022A3 true EP0907022A3 (en) 2001-06-20

Family

ID=7844319

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98117617A Withdrawn EP0907022A3 (en) 1997-10-01 1998-09-17 Device for avoiding disturbing back expansion in a piston compressor

Country Status (2)

Country Link
EP (1) EP0907022A3 (en)
DE (1) DE19743444C2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016114511A1 (en) 2015-08-31 2017-03-02 Martin Maeser Reciprocating engine with inlet valve in the piston head

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229229C (en) *
GB248595A (en) * 1925-05-13 1926-03-11 Leon De Vooght Improved air compressor
US1607478A (en) * 1925-06-18 1926-11-16 Prestage Edwin Suction valve of air and gas compressors
DE3902658A1 (en) * 1989-01-30 1990-08-02 Knorr Bremse Ag Piston compressor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112386A1 (en) * 1981-03-28 1982-12-02 Fichtel & Sachs Ag, 8720 Schweinfurt Compressor
DE3514119A1 (en) * 1985-04-19 1986-10-23 Klöckner-Humboldt-Deutz AG, 5000 Köln Method for operating a compressor having at least two cylinders, and device for implementing the method
DE4018055A1 (en) * 1990-06-06 1991-12-12 Man Nutzfahrzeuge Ag Method of reducing transmission noise in piston compressors - uses piston to regulate pressure release of clearance volume

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE229229C (en) *
GB248595A (en) * 1925-05-13 1926-03-11 Leon De Vooght Improved air compressor
US1607478A (en) * 1925-06-18 1926-11-16 Prestage Edwin Suction valve of air and gas compressors
DE3902658A1 (en) * 1989-01-30 1990-08-02 Knorr Bremse Ag Piston compressor

Also Published As

Publication number Publication date
EP0907022A2 (en) 1999-04-07
DE19743444A1 (en) 1999-04-08
DE19743444C2 (en) 1999-12-16

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