EP0156965B1 - Pompe à diaphragme - Google Patents

Pompe à diaphragme Download PDF

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Publication number
EP0156965B1
EP0156965B1 EP84113850A EP84113850A EP0156965B1 EP 0156965 B1 EP0156965 B1 EP 0156965B1 EP 84113850 A EP84113850 A EP 84113850A EP 84113850 A EP84113850 A EP 84113850A EP 0156965 B1 EP0156965 B1 EP 0156965B1
Authority
EP
European Patent Office
Prior art keywords
connecting rod
diaphragm pump
diaphragm
adjusting
bush
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
EP84113850A
Other languages
German (de)
English (en)
Other versions
EP0156965A2 (fr
EP0156965A3 (en
Inventor
Richard Von Der Heyde
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.)
KNF Neuberger GmbH
Original Assignee
KNF Neuberger GmbH
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 KNF Neuberger GmbH filed Critical KNF Neuberger GmbH
Publication of EP0156965A2 publication Critical patent/EP0156965A2/fr
Publication of EP0156965A3 publication Critical patent/EP0156965A3/de
Application granted granted Critical
Publication of EP0156965B1 publication Critical patent/EP0156965B1/fr
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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms

Definitions

  • the invention relates to a membrane pump for liquids, the connecting rod moving the membrane having an adjustable support surface for the membrane.
  • an adjustable diaphragm is also known for a diaphragm pump, which has a support disk on both sides, which are connected to one another and to the connecting rod by a central screw. By tightening the connecting screw, an enlarged membrane area is moved through the connecting rod over a longer delivery stroke.
  • a disadvantage of this construction is that a uniform stretching of the membrane is no longer possible due to the large-area clamping of the membrane surface. The edge area of the membrane that is not clamped is thereby excessively stressed, which jeopardizes its durability.
  • the support part acting on the displacement side of the membrane requires a relatively larger displacement than in the case of the usual membranes. When adjusting, the displacement must also be reopened from test run to test run. The adjustability that is possible in this construction is also only suitable for fine adjustment within the scope of an increase in pumping capacity of up to 5% at the most.
  • the invention is therefore based on the object of providing a diaphragm pump for conveying liquids in which an equalization of the scattering of the liquid throughput, that is to say an increase and / or a decrease in the liquid throughput or an adjustment of the delivery capacity taking into account predetermined operating conditions, is possible in a simple manner is without reducing the durability of the membrane and without requiring a large additional manufacturing effort.
  • the solution to this problem according to the invention is that the support surface is designed as a support ring and can be adjusted in different positions with respect to the membrane attachment to the connecting rod.
  • a membrane pump for liquids is already known from DE-OS 32 10 110, the connecting rod of which moves the membrane and has a support surface for the membrane around the clamping area.
  • this support ring or its support surface facing the outside of the membrane should not touch it in the normal operating state, but should only support it if necessary in order to “turn over”, ie. H. prevent the diaphragm from bulging in the direction of the connecting rod.
  • the position of the support ring in relation to the outside of the diaphragm cannot be adjusted.
  • the support surface of the construction according to the invention can be adjusted axially relative to the connecting rod.
  • the disadvantages of the prior art described by this patent, such as. B. uneven membrane tension and relative size of the displacement are avoided.
  • the adjustment range given by the axial displacement of the support surface is considerably enlarged and the conveying space does not need to be opened for adjustment, as in this previously known construction. Rather, the construction according to the invention enables simple adjustment directly from the opened connecting rod housing.
  • a diaphragm pump for liquids designated as a whole, has a housing 2 in which a diaphragm 3 is clamped. This closes the delivery chamber 4 from the connecting rod housing 5.
  • the membrane 3 is clamped between this and an upper housing part 6 in a known manner.
  • 7 is a valve plate, above which a head plate 8 is located.
  • 9 is the inlet valve and 10 is the outlet valve.
  • an inlet bore 11 leads into the area of a recess 12 for the valve tongue 13 of the inlet valve 9. Above this valve tongue, the inlet channel 14 can be seen.
  • FIG. 1 there is an outlet bore 15 for the outlet valve 10, a recess 16 for the valve tongue 17 there and an outlet duct 18 are provided.
  • the connecting rod designated as a whole by 19, is likewise mounted in a known manner on an eccentric pin 20 of a pump drive (not shown in more detail).
  • the connecting rod 19 consists essentially of the connecting rod eye 21 and the connecting rod shaft 22 connected to it in one piece (FIG. 3 below), on which the diaphragm 3 is also known in a known manner via a diaphragm connecting pin 23 and an attached fastening bolt 24 with the internal thread 25 of the connecting rod is connected.
  • the connecting rod 19 or the like tappet has an adjustable support surface for the central region 28 of the membrane 3. According to the invention, this support surface is now designed as a support ring 26 and can be set in different positions relative to the membrane attachment 23, 24 on the connecting rod. From FIG.
  • an adjusting device generally designated 30, to which a connecting rod connecting part 31 and an adjusting bush 32 belong.
  • the former has an external thread 41 which fits an internal thread 42 of the adjusting bush.
  • the upper end face of the adjusting bush forms the support surface 27 designed as a support ring 26 for the central region 28 of the membrane 3.
  • the support ring 26 can be set in different positions relative to the membrane outer side 29.
  • the above-mentioned connecting rod connecting part 31 is essentially cup-shaped, has a cavity 33 for plugging onto the connecting rod shaft 22 (FIG. 3) and is seated on the connecting rod shaft 22 in the use position (FIG. 1).
  • the “bottom” 34 of this cup-shaped connecting part 31 there is a bore 35 through which the fastening bolt 24 of the membrane passes and is connected to the internal thread 25 of the connecting rod shaft 22.
  • the connecting rod connecting part 31 In the assembled state (FIG. 1), the connecting rod connecting part 31 is fixed by means of its base 34 between the front side 36 of the connecting rod shaft 22 and the front side 37 of the membrane connecting pin 23.
  • On the connecting rod connecting part 31 there are also two anti-rotation flanges 38 and 39 (FIG.
  • the adjusting sleeve 32 has a radial, flange-like widening, which forms the support ring 26 or, with its front-side support surface 27, the membrane outer side 29 can be supported to an adjustable extent.
  • the connecting rod connecting part 31 belonging to the adjusting device and the associated adjusting bush 32 have a locking device, designated overall by 43, by means of which an undesired or unintentional turning of these two parts 31 and 32 against one another is prevented.
  • This locking device 43 includes a toothed locking ring 44 attached to the connecting rod connecting part 31 and at least one locking tooth 45 attached to the adjusting bush at a corresponding point, which engages in the locking ring 44 in the assembled state of the adjusting device 30.
  • the locking tooth 45 is arranged in a radially somewhat elastically flexible tubular section 46 of the adjusting sleeve 32. Within this, an abutment segment 47 opposite the locking tooth 45 is provided. This, the diagonally opposite locking tooth 45 and the tubular section 46 are integrally connected to the adjusting bush 32. This is expediently made of plastic and its tubular section 46 is deformable, if necessary by pressing transversely to the arrangement of the locking tooth 45 or abutment segment 47 (see arrows Pf 1 in FIG.
  • the connecting rod connecting part 31 also expediently consists of plastic. Both parts are then easy to manufacture and in particular the tubular section 46 of the adjusting sleeve 32 has the spring-elastic properties desired for the adjustment or locking.
  • the support ring 26 with a comprehensive adjusting device 30 can be attached to a connecting rod 10 of a conventional type without substantial changes.
  • a connecting rod 10 of a conventional type in the case of a diaphragm pump of conventional, comparable design, which has no adjusting device 30, only the connecting rod 19, e.g. B. at the upper end of its connecting rod shaft, in length such that the thickness d of the bottom 34 of the connecting rod connecting part 31 is taken into account.
  • the adjusting sleeve 32 By turning the adjusting sleeve 32, the axial distance L between the end face 36 of the connecting rod shaft and the support surface 27 of the support ring 26 changes, that is, the axial length L of the adjusting device 30.
  • the membrane connecting pin penetrates 23 the adjacent end-side passage 48 of the adjusting sleeve 32.
  • the tubular section 46 is shown schematically and distorted by means of a dash-dotted line in that deformed 46 'in which the locking tooth 45 is outside the locking ring 44.
  • the diaphragm pump 1 operates as follows (cf. in particular FIGS. 6 and 7): During the suction stroke, the suction forces to be exerted on the conveying medium counteract this downward movement of the diaphragm 3 in accordance with the arrows Pf 2 in FIGS. 6 and 7. The diaphragm 3 then takes - for example, the lower one Dead center shown - the shape shown in Figures 6 and 7 in solid lines and in section. If there is a pressure stroke with the same connecting rod position, the extension forces exerted on the pumped medium act on the diaphragm in accordance with arrows Pf 3. This then assumes the position shown in dash-dotted lines in FIGS. 6 and 7 and denoted by 3 'and 3 ".
  • the delivery volume V 1 according to FIG. 6 is reduced by a delivery volume V 2 which results from the different position of the membrane 3 in the suction position or . 3 "in the printing position.
  • the volume V 2 or V 3 resulting from the change in the membrane system is a kind of dead space through which the liquid throughput of the membrane pump 1 is reduced in the time unit. 7, the support ring 26 or its support surface 27 is out of engagement.
  • the membrane 3 ' can bend relatively far in the direction of the connecting rod 19 in its elastic region 49, and the resulting change in volume V 3 is relatively large.
  • the diaphragm 3 is supported by the support ring 26 or its support surface 27 during the pressure stroke on its underside 29 Volume change V 2 of the delivery chamber 4 is noticeably smaller than shown in Figure 7.
  • the liquid throughput in the unit of time can thus be changed and adjusted by changing the position of the support ring 26 or the like. This can e.g. B. easily done during a control and test run with the connecting rod housing 5 still open and the adjusting bush 32 snaps permanently into the adjusted position. Should z. B.
  • a diaphragm pump no control but provide a predetermined liquid throughput of one liter per minute, you can adjust this in the manner described above in a very simple manner with a corresponding pump.
  • the adjustment device 30 required for this is also very simple to manufacture and makes little effort during adjustment. It is also often desired that a certain delivery capacity should be provided by a diaphragm pump 1 under somewhat different conditions, for example at a suction height of 2 m and a counter pressure of 1 bar. With a corresponding diaphragm pump you can then, in addition to the manufacturing tolerances mentioned above, etc., which result from the different conditions such. B. Balance suction and back pressure resulting influences on the adjusting device 30 and adjust the diaphragm pump accordingly.
  • a slightly modified diaphragm pump 1 a is shown. In its lower area, it corresponds to the diaphragm pump 1 according to FIG. 1, but additionally has a control device, which is described in more detail below and generally designated 50.
  • its head plate 8 a is provided with a damping chamber 51, which is connected to the inlet duct 14 via a branch 14 a.
  • the damping space is closed off at the top by a damping membrane 52. This is clamped at its edges between the head plate 8 a and a connecting part 53.
  • a stamp 55 is located in an approximately cylindrical inner space 54. The height can be adjusted in accordance with the double arrow Pf 4.
  • a desired maximum delivery rate for. B. a liter per minute, with certain suction and back pressure conditions, can be adjusted, namely at maximum position of the control device 50.
  • the control device 50 When operating the diaphragm pump 1, one can then use the control device 50 Set a targeted reduction in the delivery rate if necessary.
  • the possibility of adjusting the support ring 26 not only results in an adjustment of the delivery rate and the possibility of compensating for manufacturing and material tolerances.
  • the efficiency of the diaphragm pump 1 or 1 can also be improved or, if necessary, deliberately deteriorated, the latter in particular by actuating the control device 50.
  • the abutment segment 47 prevents the locking tooth 45 from unintentionally moving out of the area of the locking ring 44.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (10)

1. Pompe à diaphragme pour liquides, dont la bielle imprimant un mouvement au diaphragme présente une surface réglable d'appui de ce diaphragme, caractérisée par le fait que la surface d'appui est réglable dans différentes positions, en tant que bague de soutien (26), par rapport à la fixation (23, 24) du diaphragme à la bielle.
2. Pompe à diaphragme selon la revendication 1, caractérisée par le fait que la bague de soutien (26) peut être encliquetée dans ses différentes positions.
3. Pompe à diaphragme selon la revendication 1 ou 2, caractérisée par le fait qu'un dispositif (30) d'ajustement de la bague de soutien (26) est prévu sur la bielle (19), de préférence un dispositif d'ajustement pouvant être fixé à une bielle de longueur éventuellement adaptée.
4. Pompe à diaphragme selon l'une des revendications 1 à 3, caractérisée par le fait que Je dispositif d'ajustement (30) présente une pièce (31) de jonction de la bielle pouvant être placée sur le corps (22) de cette bielle et une douille de réglage en liasion avec la bague de soutien (26), la longueur axial (L) du dispositif d'ajustement (30) étant réglable.
5. Pompe à diaphragme selon l'une des revendications 1 à 4, caractérisée par le fait que la pièce (31 ) de jonction de la bielle est réalisée sensiblement en forme de godet et comprend une cavité (33) permettant l'emboîtement sur le corps (22) de la bielle, un perçage (35) ménagé dans sa face extrême pour le passage traversant d'un boulon de fixation (24) faisant partie du diaphragme (3), un filetage externe (41) coopérant avec la douille de réglage (32), ainsi qu'au moins un collet anti-rotation (38, 39) qui peut s'appliquer sur l'oeil (21 ) de la tête de bielle ou méplat analogue (40) de la bielle, en empêchant une rotation de la pièce de jonction de cette bielle.
6. Pompe à diaphragme selon l'une des revendications 1 à 5, caractérisée par le fait que le dispositif d'ajustement (30) possède une douille de réglage (32) sensiblement tubulaire dont la face extrême élargie radialement, de préférence à la manière d'une collerette, forme la bague de soutien (26), un filetage interne (42) de la douille étant adapté au filetage externe (41) de la pièce (31 ) de jonction de la bielle, et la douille de réglage (32) ainsi que la pièce (31) de jonction de la bielle comportant un dispositif d'encliquetage (43) en prise mutuelle.
7. Pompe à diaphragme selon l'une des revendi- cationa 1 à 6, caractérisée par le fait que le dispositif d'encliquetage (43) comprend une bague d'arrêt dentée (44) ménagée, de préférence, sur la pièce (31) de jonction de la bielle, et au moins une dent d'arrêt (45) qui est façonnée, de préférence, sur la douille de réglage (32) et pénètre dans la bague d'arrêt dentée.
8. Pompe à diaphragme selon l'une des revendications 1 à 7, caractérisée par le fait que la dent d'arrêt (45) se trouve dans une région tubulaire qui est douée d'une souplesse élastique sensible dans le sens radial et est reliée, de préférence d'un seul tenant, à la douille de réglage (32), un segment de contre-butée (47) étant commodément prévu dans cette région tubulaire, en vis-à-vis de la dent d'arrêt (45).
9. Pompe à diaphragme selon l'une des revendications 1 à 8, caractérisée par le fait que la douille de réglage (32) et/ou la pièce de jonction (31), de préférence ces deux parties (31, 32), constistent en une matière plastique.
10. Pompe à diaphragme selon l'une des revendi- cationa 1 à 9, munie, dans la zone d'aspiration, d'une chambre d'amortissement pour amortir des à-coups de pression du fluide refoulé, la capacité de la chambre d'amortissement étant réglable dans le sense d'une variation de l'afflux de fluide à la pompe à diaphragme, caractérisée par le fait que la pompe (1 1 a) à diaphragme présente une bague de soutien réglable par rapport à la face externe (29) du diaphragme, en vue de l'ajustement d'un débit maximal.
EP84113850A 1983-12-30 1984-11-16 Pompe à diaphragme Expired EP0156965B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833347538 DE3347538A1 (de) 1983-12-30 1983-12-30 Membranpumpe
DE3347538 1983-12-30

Publications (3)

Publication Number Publication Date
EP0156965A2 EP0156965A2 (fr) 1985-10-09
EP0156965A3 EP0156965A3 (en) 1986-04-30
EP0156965B1 true EP0156965B1 (fr) 1987-11-19

Family

ID=6218429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84113850A Expired EP0156965B1 (fr) 1983-12-30 1984-11-16 Pompe à diaphragme

Country Status (3)

Country Link
EP (1) EP0156965B1 (fr)
JP (1) JPS60127489U (fr)
DE (2) DE3347538A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315968A (en) * 1993-03-29 1994-05-31 Orbital Walbro Corporation Two-stage fuel delivery system for an internal combustion engine
GB2378734A (en) 2001-08-14 2003-02-19 Carmeli Adahan Disposable pump with detachable motor
CN203009083U (zh) * 2013-01-04 2013-06-19 浙江瑞星化油器制造有限公司 用于一步起动式化油器的膜片式泵油器
DE102022119801A1 (de) 2022-08-05 2024-02-08 Prominent Gmbh Membransystem mit Selbsthemmung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149572A (en) * 1961-11-13 1964-09-22 William E Davis Adjustable diaphragm pump
DE1503428A1 (de) * 1966-01-12 1969-04-03 Hansa Metallwerke Ag Membranverdichter
US3397642A (en) * 1966-11-18 1968-08-20 American Mach & Foundry Metering pump
DE2618786C2 (de) * 1976-04-29 1978-10-12 Bau- Und Industrietechnik Gmbh, 2000 Hamburg Verdrängungspumpe mit Membran
DE3210110A1 (de) * 1981-11-28 1983-06-01 Erich 7812 Bad Krozingen Becker Membranpumpe
IT8221999V0 (it) * 1982-05-26 1982-05-26 Kamyr Srl Pompa dosatrice a membrana, provvista di doppie valvole di ritegno.

Also Published As

Publication number Publication date
DE3467603D1 (en) 1987-12-23
EP0156965A2 (fr) 1985-10-09
DE3347538A1 (de) 1985-07-11
JPS60127489U (ja) 1985-08-27
JPH0124388Y2 (fr) 1989-07-24
EP0156965A3 (en) 1986-04-30

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