EP0475931B1 - Clapet de compresseur - Google Patents

Clapet de compresseur Download PDF

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Publication number
EP0475931B1
EP0475931B1 EP19910890186 EP91890186A EP0475931B1 EP 0475931 B1 EP0475931 B1 EP 0475931B1 EP 19910890186 EP19910890186 EP 19910890186 EP 91890186 A EP91890186 A EP 91890186A EP 0475931 B1 EP0475931 B1 EP 0475931B1
Authority
EP
European Patent Office
Prior art keywords
stop plate
springs
valve
catcher
closure piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19910890186
Other languages
German (de)
English (en)
Other versions
EP0475931A1 (fr
Inventor
Hans Hrabal
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.)
Hoerbiger Ventilwerke GmbH and Co KG
Original Assignee
Hoerbiger Ventilwerke GmbH and Co KG
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 Hoerbiger Ventilwerke GmbH and Co KG filed Critical Hoerbiger Ventilwerke GmbH and Co KG
Publication of EP0475931A1 publication Critical patent/EP0475931A1/fr
Application granted granted Critical
Publication of EP0475931B1 publication Critical patent/EP0475931B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1053—Adaptations or arrangements of distribution members the members being Hoerbigen valves
    • 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
    • F04B49/243—Bypassing by keeping open the inlet valve

Definitions

  • the invention relates to a compressor valve which has a valve seat, a catcher and an annularly or plate-shaped closure piece which is arranged displaceably between them, which controls through-channels in the valve seat and is loaded in the direction of the valve seat by closing springs, and to which a lifting device is assigned which acts with lifting fingers through the valve seat on the closure piece, a stop plate being arranged in the valve between the closure piece and the catcher, which is held by at least one spring at a stop provided at a distance from the valve seat.
  • Plate valves with a lifting device of the type mentioned are known in various designs.
  • the lifting device's task is to keep the valve open against the closing forces acting on the closure piece in order to regulate the delivery rate or to switch the compressor to idle.
  • the lifting device consists of a lifting gripper which acts with lifting fingers through the through-flow channels of the valve seat on the closure piece and is actuated by an actuating device which can be driven pneumatically or hydraulically, for example.
  • the lifting fingers of the lifting gripper restrict the free passage cross section of the valve seat in the flow channels of the valve seat, which is disadvantageous when the compressor is being conveyed and increases its volume resistance.
  • the closure piece is additionally mechanically stressed by the gripper, which acts on the closure piece with the gripper fingers at locations spaced apart from one another. It is therefore usually necessary to make the closure plate thicker than in the case of uncontrolled valves in order to avoid deformations due to the often high closing forces that occur when the medium flows back and to withstand the bending stresses that occur.
  • the closure piece of the valve consists of plastic, e.g. from a plastic plate with slots, because plastic is known to have a lower bending stiffness than the steel otherwise used for the valve parts.
  • plastic In order to avoid excessive stress on plastic closure pieces, it is already known to provide the lifting gripper with more lifting fingers.
  • the invention has for its object to improve the previously known valves with a lifting device so that the mechanical stress of the closure piece without needing to increase the number of lifting fingers is not disadvantageously increased when the valve is forced open.
  • this object is achieved in that the force of the springs which press the stop plate against the stop is greater than the flow forces acting in the opening direction on the closure piece and the stop plate by means of the lifting device against the force of the springs acting against it Catcher can be moved and pressed against it.
  • the stop plate provided according to the invention actually forms an end stop for the closure piece.
  • the correspondingly large spring force acting on the stop plate prevents the stop plate from being significantly shifted against the catcher during normal operation of the valve in full load operation.
  • the lifting device When the lifting device is activated to e.g. to switch to idle, the lifting device first presses the closure piece against the force of the closing springs against the stop plate and then shifts the closure plate together with the stop plate against the catcher.
  • the stroke of the closure piece is thus in the idle mode by the displacement of Stop plate enlarged.
  • the flow forces acting on the closure piece which are known to increase sharply with the flow velocity, are likewise correspondingly small.
  • the closure piece is therefore only exposed to small stresses overall, so that even if it consists of less solid material, for example plastic, only a small number of lifting fingers is required.
  • At least a part of the closing springs loading the closure piece is supported on the stop plate.
  • the valve acting on the closure piece closing springs which are guided and supported on the stop plate as in the case of valves with a conventional catcher, as well as additional, stronger springs which hold the stop plate against its force against the force of the closing springs.
  • this stop can also consist of several parts or several stops can be provided for the stop plate, e.g. in the center of the valve, in the peripheral area of the stop plate or in the area in between.
  • closing springs are supported at least in part on the catcher and act on the closure piece through openings in the stop plate. At this Training, closing springs supported on the stop plate are superfluous.
  • the closing springs can be guided in the stop plate. There is then no need for a guide in the catcher, and when using coil springs, the springs with their outer diameter are not chafed in the spring nests in the catcher.
  • An advantageous embodiment is that the springs each act on a guide pin which is slidably guided in a bore in the stop plate. This bolt transmits the spring force to the closure piece.
  • Another significant advantage of the design according to the invention is that no uncontrolled impact forces are exerted on the catcher, which can therefore be made considerably thinner and weaker than in conventional valves.
  • the arrangement according to the invention can be advantageously used both in valves with a so-called safety catcher and in versions with a self-supporting catcher. Twisting of the closure piece is also avoided, which is particularly important if it is designed as a plate.
  • FIG. 1 shows an axial central section through a compressor valve according to the invention with a lifting device
  • Fig. 2 shows a central section through another embodiment of the valve according to the invention
  • Fig. 3 shows a detail of a further variant.
  • the compressor valve according to the invention consists of a valve seat 1 which has through-channels 2 for the medium conveyed by the compressor, which are controlled by a plate-shaped closure piece 3.
  • a catcher 4 is assigned to the valve seat 1 and is connected to the valve seat 1 by a central central screw 5.
  • a stop plate 8 is guided in the stroke direction of the closure piece 3 in the valve.
  • the stop plate 8 is loaded in the direction of the valve seat 1 by springs 9, which are supported in spring nests of the catcher 4. Own stops 10 keep the stop plate 8 at a distance from the valve seat 1, so that the closure piece 3 can carry out its lifting movement.
  • the stop plate 8 forms normal operation of the valve, the end stop for the lifting movement of the closure member 3.
  • springs 11 On the stop plate 8 are also supported springs 11, which act on the closure member 3 and may consist of spring plates or coil springs in a known manner. Damper plates, handlebar plates and other internals commonly used in valves can also be provided.
  • a lifting device 12 is assigned to the valve shown, which acts with lifting fingers 13 through the through-channels 2 of the valve seat on the closure piece 3.
  • the lifting device 12 is conventionally centered on the central screw 5 and is actuated in the exemplary embodiment according to FIG. 1 by a pneumatic or hydraulic actuating device 14 with a membrane. With 15 a return spring for the lifting device 12 is designated.
  • the closing springs 11 consist of one or more spring plates which are supported on the stop plate 8, possibly together with damper or cushion plates, which are also provided.
  • the stops 10 for the stop plate 8 consist of pin-shaped bodies which are attached to the valve seat 1 and protrude against the stop plate 8.
  • the springs 9 are designed to be relatively strong, so that they hold the stop plate 8 against the flow forces occurring during normal valve operation at the stops 10.
  • the stop plate 8 is loaded by springs 9 seated in the catcher 4.
  • the stops 10, through which the stop plate 8 is held at a distance from the valve seat 1, are formed here by claw-like projections which project radially and axially beyond the stop plate 8 and are supported on the valve seat 1.
  • the closing springs 11 for the closure piece 3 are helical springs seated in the stop plate 8.
  • a damper plate 16 is shown in FIG is loaded by its own damper springs 17.
  • the lifting device 12 is only partially shown.
  • the return spring 15 is supported directly on the valve seat 1.
  • Both the plate-shaped closure piece 3 and the damper plate 16 are provided with links and clamped between the spacer ring 6 and the valve seat 1 via a hub. With 18 a centering pin is designated, which is fastened in the valve seat 1, passes through the closure piece 3 and the damper plate 16 and protrudes into a bore in the stop plate 8.
  • the stop 10 for the stop plate 8 is formed from a shoulder of the spacer ring 6.
  • the stop plate 8 is held against the flow forces at the stop 10 by springs 9 also provided here.
  • the closing springs 11 for the closure piece 3 are also supported on the catcher 4 itself in this embodiment. They act on a guide pin 19 which passes through the stop plate 8, is guided in a bore 20 of the same and acts on the closure piece 3 with its end.
  • the lifting device is indicated in this exemplary embodiment only by a lifting finger 13, which acts on the closure piece 3 through a through channel 2 of the valve seat 1.
  • the catcher 4 is designed to be self-supporting, as in the exemplary embodiment according to FIG. 1, whereas a so-called safety catcher 4 is provided according to FIG. 2, which is clamped together at its edge with the valve seat 1.
  • valves shown The function of the valves shown is the same in all exemplary embodiments.
  • the closure piece 3 With normal promotion of the compressor, that is, when the lifting fingers 13 are retracted by the return spring 15 of the lifting device 12 from the closure piece 3, as shown in the drawings, the closure piece 3 can carry out its lifting movements freely, the stop plate 8 serving as an end stop.
  • the lifting device 12 is actuated, e.g.
  • the actuating device 14 shown in Fig. 1 is acted upon by a pressure medium, whereupon the lifting fingers 13 press the closure piece 3 against the force of the return spring 15 first against the stop plate 8 and subsequently also the stop plate 8 lifts off their stops 10 and against the force of the Presses springs 9 to catcher 4.
  • the medium sucked in by the compressor can flow freely through the then open valve in both directions when the closure piece 3 is lifted off.
  • the stroke of the closure piece 3 is increased by the displacement path of the stop plate 8, so that the free passage cross section through the valve is correspondingly large in this area, which results in a reduction in the flow velocity of the medium.
  • the valve is forcibly kept open, the flow forces acting on the closure piece 3 are thus significantly reduced, so that the stress on the closure piece 3 is also reduced to the same extent. A disadvantageous twisting of the plate-shaped closure piece 3 is prevented.
  • valve in particular the spacer ring 6, which in the exemplary embodiments according to FIGS. 1 and 3 also acts as a guide ring for the sliding guidance of the closure piece 3 and other provided valve parts, and also for the displaceable stop plate 8, can also be made of ceramic material consist.
  • Another advantage of the valve according to the invention is that the lifting fingers 13, which are only present in a relatively small number, do not excessively restrict the flow cross-section in the through-channels 2 of the valve seat 1, so that the compressor valve according to the invention overall has a relatively coarse flow cross-section and, associated therewith, a relatively small volume resistance .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)

Claims (5)

  1. Soupape de compresseur comportant un siège de soupape (1), un organe de saisie (4) et une pièce de fermeture (3) en forme de plaque ou d'anneau, agencée en déplacement entre eux, ladite pièce de fermeture commandant des canaux de passage (2) dans le siège de la soupape (1) et étant sollicitée par des ressorts de fermeture (11) en direction du siège de la soupape (1), et à laquelle est associée un dispositif de soulèvement (12) qui agit par des doigts de soulèvement (13) sur la pièce de fermeture (3) à travers le siège de soupape (1), une plaque de butée (8) étant agencée entre la pièce de fermeture (3) et l'organe de saisie (4), ladite plaque de butée étant maintenue au moins par un ressort (9) sur une butée prévue à distance du siège de soupape (1), caractérisée en ce que la force des ressorts (9) qui poussent la plaque de butée (8) sur la butée (10) est supérieure aux forces d'écoulement agissant en direction d'ouverture sur la pièce de fermeture (3) et en ce que la plaque de butée (8) peut être déplacée contre l'organe de saisie (4) et pressée contre celui-ci au moyen du dispositif de soulèvement (12) à l'encontre de la force des ressorts (9) qui agissent sur elle.
  2. Soupape de compresseur selon la revendication 1, caractérisée en ce qu'au moins une partie des ressorts de fermeture (11) sollicitant la pièce de fermeture (3) est en appui sur la plaque de butée (8).
  3. Soupape de compresseur selon la revendication 1, caractérisée en ce que les ressorts de fermeture (11) sont au moins partiellement en appui sur l'organe de saisie (4) et agissent sur la pièce de fermeture (3) à travers des ouvertures dans la plaque de butée (8).
  4. Soupape de compresseur selon la revendication 3, caractérisée en ce que les ressorts de fermeture (11) sont guidés dans la plaque de butée (8).
  5. Soupape de compresseur selon la revendication 4, caractérisée en ce que les ressorts de fermeture (11) agissent chacun sur un goujon de guidage (19) qui est guidé dans un alésage (20) de la plaque de butée (8).
EP19910890186 1990-09-04 1991-08-22 Clapet de compresseur Expired - Lifetime EP0475931B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT180990A ATA180990A (de) 1990-09-04 1990-09-04 Verdichterventil
AT1809/90 1990-09-04

Publications (2)

Publication Number Publication Date
EP0475931A1 EP0475931A1 (fr) 1992-03-18
EP0475931B1 true EP0475931B1 (fr) 1994-07-20

Family

ID=3521442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910890186 Expired - Lifetime EP0475931B1 (fr) 1990-09-04 1991-08-22 Clapet de compresseur

Country Status (3)

Country Link
EP (1) EP0475931B1 (fr)
AT (1) ATA180990A (fr)
DE (1) DE59102240D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5378117A (en) * 1994-03-28 1995-01-03 Dresser-Rand Company Valve unloading means, and a valve unloading actuator therefor
AT401281B (de) * 1994-05-11 1996-07-25 Hoerbiger Ventilwerke Ag Abhebegreifer
AT512790B1 (de) 2012-11-15 2013-11-15 Hoerbiger Kompressortech Hold Zylinderkopf für einen Kolbenkompressor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1126203A (fr) * 1954-09-27 1956-11-19 Hoerbiger & Co Soupape automatique à plateau pour compresseurs à gamme de vitesses de rotation variable
DE1118922B (de) * 1955-04-19 1961-12-07 Enfo Grundlagen Forschungs Ag Stufenlose Liefermengenregelung fuer schnellaufende Kolbenkompressoren
CH401105A (de) * 1961-05-12 1965-10-31 Stal Refrigeration Ab Druckventil an einem Kältekompressor
AT401087B (de) * 1986-04-16 1996-06-25 Hoerbiger Ventilwerke Ag Verfahren zum anpassen eines verdichterventils an unterschiedliche betriebsverhältnisse des verdichters und verdichterventil zur durchführung des verfahrens

Also Published As

Publication number Publication date
EP0475931A1 (fr) 1992-03-18
ATA180990A (de) 1996-02-15
DE59102240D1 (de) 1994-08-25

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