US3583838A - Rotary displacement pump - Google Patents

Rotary displacement pump Download PDF

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Publication number
US3583838A
US3583838A US846740A US84674069A US3583838A US 3583838 A US3583838 A US 3583838A US 846740 A US846740 A US 846740A US 84674069 A US84674069 A US 84674069A US 3583838 A US3583838 A US 3583838A
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US
United States
Prior art keywords
sleeve
housing
sealing
pump
displacement pump
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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
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US846740A
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English (en)
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Siegfried Stauber
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Individual
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Individual
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Publication of US3583838A publication Critical patent/US3583838A/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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/14—Machines, pumps, or pumping installations having flexible working members having peristaltic action having plate-like flexible members

Definitions

  • the instant invention generally relates to pumps and particularly concerns a rotary displacement pump of the type having a multiportion housing with a sleeve disposed in the interior of the housing, the sleeve being formed of an elastic material and displaying sealing strips at the edges thereof and a crosspiece between the suction and delivery sides of the pump, the sleeve being secured against rotation and connected with the housing.
  • a rotor is disposed in the interior of the sleeve for deflecting the same outwardly in at least two locations, the rotor pressing the sleeve at these locations against the inside wall of the housing, the locations effectively performing a traveling motion as the rotor rotates to thus produce sealing locations to divide the cavity or chamber disposed between the housing and the sleeve into traveling delivery pockets.
  • the instant invention comprises a rotary displacement pump of the type generally above described.
  • the rotary displacement pump will be seen to comprise a multiportion housing having a sleeve of elastic material disposed within the interior of the housing, the sleeve being connected with the housing rigidly against rotation and furthermore displaying sealing strips at the edges thereof as well as a crosspiece between the suction and delivery sides of the pump.
  • a rotor is disposed in the interior of the sleeve for deflecting the same outwardly in at least two locations, the rotor pressing the sleeve at the outwardly deflecting locations against the inside wall of the housing, these locations traveling as the rotor rotates to thereby produce sealing contacts dividing the space between tee housing and the sleeve into traveling pockets.
  • the instant invention is furthermore characterized by the feature that sealing strips are secured to the edges of the sleeve and are clamped-into portions of the housing, these sealing strips being acted upon by a pressure medium via a connecting channel in a fashion such that sealing losses are avoided.
  • FIG. 1 is a schematic, cross-sectional view of the rotary dis placement pump in accordance with the instant invention
  • FIG. 2 is an enlarged view of a partial section of the pump in accordance with FIG. 1;
  • FIG. 3 is an illustration taken along line III-III of FIG. 2 depicting an additional embodiment of the rotor in cross section;
  • FIG. 4 is a schematic view, partially in section, depicting a further embodiment of the rotor in accordance wit the instant invention.
  • FIGS. 5ak are each partial sectional views taken through the pump housing depicting various sleeve embodiments in accordance with the instant invention.
  • FIG. 1 a rotary displacement pump is schematically depicted.
  • a housing 1 structured as a ring having a cylindrical bore 2 is provided for the pump and a sleeve 3 is inserted therein, the sleeve consisting of elastic material and being provided with a crosspiece or web 4 supported in the housing 1.
  • An inlet opening 5 and an outlet opening 6 for the pump are disposed on both sides of the crosspiece 4.
  • the sleeve 3 is ring-shaped and, in its interior, contains a rotor 7 having a shape which deviates from the shape of a circle. In the example of FIG. 1, the rotor shape is that of an ellipse.
  • Rotor 7 serves to press the sleeve 3 against the bore 2 of the housing 1 at two locations diametrically disposed opposite one another such that two sealing contacts 8 and 9 are formed at these locations.
  • the pockets then resulting between the sealing contacts serve to convey the delivery medium such as a gas, a liquid or a pulpy substance between the inlet and outlet openings.
  • Rotor 7 itself consists of a rotor body 12 spaced from an elastically deformable exterior ring 13 by means of a plurality of balls or rollers as will be discussed in more detail hereinbelow.
  • the sealing Iocations 8 and 9 effectively travel along the circumference of bore 2 of the housing 1 curing the course of which tee stationary exterior ring 13 would successively and elastically deform.
  • the delivery pockets 10 will travel from the inlet 5 to the outlet 6 of the pump and thus serve to pump the medium contained within tee pockets.
  • FIGS. 2 and 3 the embodiment of the novel rotary pump of the instant invention is depicted in more detail.
  • a number of rollers or balls 18 are provided in a fashion such that they are distributed at the circumference of what is here shown as a circular shaft 16.
  • An exterior ring 17 is deformed or deflected by the rollers 18 and thus deviates from the exact shape of a circle.
  • the rollers or balls 18 are retained in their respective positions by a cage 19 as best seen in FIG. 3 and thus serve to press the flexible ring 17 as well as sleeve 20 at the respective locations against the wall of e housing.
  • the size and the number of the delivery pockets which, in each instance, are formed between two rollers or roll bodies, is dependent upon the number of roll bodies disposed between flexible ring 17 and the shaft 16.
  • the distance between two roll bodies of the roller bearing and the delivery pockets formed would be very small by virtue of the larger number of roll bodies provided.
  • the construction will also elliptically deform or deflect the exterior ring such that it presses the sleeve, as depicted in FIG. 1, at two locations 8 and 9 against the wall of the housing.
  • the exterior ring of the roller bearing can itself provide the function of the sleeve.
  • Housing 1 is a multiportion housing and can be seen to consist of a ring-shaped exterior portion 25 as well as two side flanges 24 with a cylindrical member 23 as best illustrated in FIG. 3. Housing parts 23, 24 and 25 form a hollow cavity 22 which is closed on all sides and in which are held the edges of the sleeve 20 which, on the outside thereof, has sealing strips 50 secured thereto.
  • the sealing strips 50 are constructed as sealing lips which are acted upon by a pressure medium via channel 51 which, for example, is connected with the delivery side 6 of the pump.
  • a sealing member 52 is provided for sealing against the outside, sealing member 52 being constructed, for example, in the nature of an O-ring selectively supported in housing member 24 or 25.
  • the sealing member 52 serves to seal off the slot between the members 24 and 25.
  • channel 51 can also be outwardly directed, if desired, and connected to an external pressure source 54 which need not be described in more detail for purposes of the invention.
  • the sealing strips can be acted upon by a pressure which is independent of the delivery pressure of the pump or by a pressure which is controlled by control means 55 via conduit 56 in dependency upon the pressure on the delivery side 6 of the pump. Accordingly, it is possible to have the sealing strips 50 of the-sleeve 20 acted upon either by a lower, an equal or a higher pressure than that existing on the delivery side of the pump and/or acted upon either by a variable or by a constant pressure.
  • the sleeve 20 having sealing strips 52 secured to the same is contemplated to be pretensioned on all sides thereof.
  • the sleeve When in a relaxed condition, the sleeve has a diameter which is small than the external diameter of the cylindrical portion 23 such that the sleeve 20 must also be widened at its edges for mounting within the pump. Furthermore, the length of the cylindrical sleeve can be somewhat smaller such that the sleeve 20 must be stretched for the purpose of inserting the sealing strips 50 thereof into the hollow cavity 22.
  • This pretensioning action is of substantial importance when one is utilizing a rubber/elastic sleeve material to ensure good functioning of the pump in that the pretensioning ensures that the portions of the sleeve which are pressed against the bore of the housing as the rotor rotates will lift themselves again from the bore so as to form the suction chamber.
  • the sleeve is formed by means of a steel bushing, then the greater restoring force makes the axial pretensioning thereof no longer necessary.
  • Crosspiece 26 which comprises an extension of the sleeve 20.
  • Crosspiece 26 is disposed in a groove 57 recessed in housing portion 25.
  • Crosspiece 26 is likewise structured as a lip sealing means within groove 57 and can be acted upon by a pressure medium in exactly the same manner as was the case with sealing strips 50, with the pressure either occurring on the delivery side of the pump or being supplied by an external source, depending upon the particular need.
  • FIG. 4 a further embodiment of the rotor is depicted, the rotor comprising two discs 31, 32 disposed on a shaft, the discs being connected by bolts 35, 36 on which two ball bearings 33, 34 are rotatably mounted.
  • Ball bearings 33, 34 serve to push with their exterior rings against the sleeve and, in this manner, effectively produce two sealing locations.
  • it is also possible to provide for more than two ball bearings which, of course, would result in a corresponding in crease of the sealing locations.
  • FIG. 5 various embodiments of the sleeve and its assembly into the pump is depicted.
  • the support on all sides of the sleeve edge having the sealing strips is ensured, such uniform support being necessary for a good functioning of the pump.
  • the only variant features of these embodiments concern the arrangement of the sealing strip, its shape as well as tee material of the sleeve.
  • FIG. 5a corresponds to the embodiment of the sleeve as depicted in FIG. 2 with the exception that the housing portion 25' embraces the sealing strips 50 on the external side as well. In this fashion, it is possible to forgo the O-ring 52 without sacrificing, by such deletion, the sealing action.
  • the channel 51 for acting upon the sealing strip 50 is also illustrated. In the arrangement of FIGS. 5bk, this channel has been deleted for illustrative simplicity.
  • the individual embodiments need no further comment with the exception of the embodiments in FIGS. 50, d, g, k, in which the sleeve and the sealing strips are made of different materials and are connected to one another in a suitable fashion such as vulcanization, for example.
  • the sleeve can contain various inserts, for example, inserts made of fabric, steel cables, sheet metal, and other flexible and elastic materials.
  • the rotary displacement pump in accordance with the instant invention substantially enlarges the field of application of such pumps.
  • the maximum work pressure was limited to about 3 Atii. and the rotational velocity to a maximum of 2,000 rpm. by virtue of the described structure of the novel housing and sleeve of the instant invention, it is now possible to obtain with pumps of this type a delivery pressure of at least 5 Atii. and a rotational velocity up to 10,000 r.p.m., a significant achievement when compared with the outputs heretofore obtained.
  • a rotary displacement pump having suction and delivery sides, said pump comprising a multiportion housing, a sleeve of elastic material disposed in the interior of said housing and connected with said housing in a rotation-rigid fashion, said sleeve including sealing strips at the edges thereof for sealing and delivery side and suction side from one another and a crosspiece between said suction and delivery sides, a rotor means disposed in the interior of said sleeve for deflecting said sleeve outwardly in at least two locations, said rotor means pressing said sleeve against the inside wall of the housing at said locations which travel as said rotor rotates thereby producing sealing contacts which divide the space between said housing and said sleeve into travelling pockets, and wherein said sealing strips at said edges of said sleeve are clamped into portions of said multiportion housing, and means including a connecting channel for directing a pressure medium to said sealing strips, said pressure medium acting upon said sealing strips to improve the seal thereof between said delivery side and said suction
  • said sleeve when in a relaxed condition, is smaller in 5 both the axial and radial directions than its surrounding housing assembly, such that said sleeve is subjected to axial and tangential tensile stress when said sleeve is mounted in said housing.
  • said rotor means comprises a roller bearing having a thin exterior ring, said roller bearing being secured upon a noncircular shaft.
  • sealing strip is acted upon by an external pressure source.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Rotary Pumps (AREA)
US846740A 1968-08-09 1969-08-01 Rotary displacement pump Expired - Lifetime US3583838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1199268A CH478346A (de) 1968-08-09 1968-08-09 Rotations-Verdrängerpumpe

Publications (1)

Publication Number Publication Date
US3583838A true US3583838A (en) 1971-06-08

Family

ID=4378813

Family Applications (1)

Application Number Title Priority Date Filing Date
US846740A Expired - Lifetime US3583838A (en) 1968-08-09 1969-08-01 Rotary displacement pump

Country Status (14)

Country Link
US (1) US3583838A (ja)
JP (1) JPS4949126B1 (ja)
AT (1) AT291001B (ja)
BE (1) BE736863A (ja)
BG (1) BG15242A3 (ja)
CH (1) CH478346A (ja)
DE (1) DE1934779C3 (ja)
ES (1) ES369975A1 (ja)
FR (1) FR2015343A1 (ja)
GB (1) GB1280185A (ja)
IL (1) IL32709A (ja)
NL (1) NL6911073A (ja)
RO (1) RO54847A (ja)
SE (1) SE353132B (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4288205A (en) * 1980-01-18 1981-09-08 Pako Corporation Variable volume peristaltic pump
US5791888A (en) * 1997-01-03 1998-08-11 Smith; Clyde M. Static seal for rotary vane cartridge pump assembly
US20130045122A1 (en) * 2010-03-01 2013-02-21 Ulrich Gmbh & Co. Kg Peristaltic pump
WO2015140206A1 (de) * 2014-03-19 2015-09-24 Continental Automotive Gmbh Pumpe zur förderung einer flüssigkeit, insbesondere zur förderung eines abgasreinigungsadditivs
US20160138589A1 (en) * 2013-06-13 2016-05-19 Continental Automotive Gmbh Pump for delivering a liquid
US10570738B2 (en) * 2015-04-29 2020-02-25 Ebm-Papst St. Georgen Gmbh & Co. Kg Pump device with deformable pump ring
CN111140477A (zh) * 2019-12-26 2020-05-12 深圳市洋沃电子有限公司 一种泵水装置及美发器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2909228C2 (de) * 1979-03-09 1986-10-30 Fickelscher, Kurt G., Dipl.-Ing., 6710 Frankenthal Rotationskolbenmaschine
GB9614866D0 (en) * 1996-07-15 1996-09-04 Charles Austen Pumps Ltd Rotary pump
DE102013104242A1 (de) * 2013-04-26 2014-10-30 Emitec Gesellschaft Für Emissionstechnologie Mbh Vorrichtung zur dosierten Bereitstellung einer Flüssigkeit
DE202015103751U1 (de) * 2015-07-16 2016-10-19 Ebm-Papst St. Georgen Gmbh & Co. Kg Pumpenvorrichtung
GB2564680B (en) * 2017-07-19 2019-08-21 Charles Austen Pumps Ltd A rotary diaphragm positive displacement pump

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE554414A (ja) *
DE657429C (de) * 1936-06-09 1938-03-04 Kuesters Eduard Regelbare Pumpe zum Foerdern von Gasen und Fluessigkeiten
US2519642A (en) * 1945-04-11 1950-08-22 Ford Reginald Clarence Pump
GB702105A (en) * 1951-12-17 1954-01-06 Svenska Flygmotor Aktiebolaget A sealing device for relatively moving parts
US2849962A (en) * 1957-08-28 1958-09-02 United Shoe Machinery Corp Pump for chemicals and the like
US3053236A (en) * 1960-09-08 1962-09-11 Thompson Ramo Woeldridge Inc Oscillatory actuator seal system
US3113524A (en) * 1961-12-26 1963-12-10 Roper Hydraulics Inc Gear pump with trapping reliefs
US3152553A (en) * 1960-12-13 1964-10-13 Rydberg Sverker Rotary pump or the like
US3176622A (en) * 1962-06-06 1965-04-06 Fred B Pfeiffer Pump
US3408946A (en) * 1967-03-14 1968-11-05 William J Easton Jr Diaphragm pump with double compression roller

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE554414A (ja) *
DE657429C (de) * 1936-06-09 1938-03-04 Kuesters Eduard Regelbare Pumpe zum Foerdern von Gasen und Fluessigkeiten
US2519642A (en) * 1945-04-11 1950-08-22 Ford Reginald Clarence Pump
GB702105A (en) * 1951-12-17 1954-01-06 Svenska Flygmotor Aktiebolaget A sealing device for relatively moving parts
US2849962A (en) * 1957-08-28 1958-09-02 United Shoe Machinery Corp Pump for chemicals and the like
US3053236A (en) * 1960-09-08 1962-09-11 Thompson Ramo Woeldridge Inc Oscillatory actuator seal system
US3152553A (en) * 1960-12-13 1964-10-13 Rydberg Sverker Rotary pump or the like
US3113524A (en) * 1961-12-26 1963-12-10 Roper Hydraulics Inc Gear pump with trapping reliefs
US3176622A (en) * 1962-06-06 1965-04-06 Fred B Pfeiffer Pump
US3408946A (en) * 1967-03-14 1968-11-05 William J Easton Jr Diaphragm pump with double compression roller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4288205A (en) * 1980-01-18 1981-09-08 Pako Corporation Variable volume peristaltic pump
US5791888A (en) * 1997-01-03 1998-08-11 Smith; Clyde M. Static seal for rotary vane cartridge pump assembly
US20130045122A1 (en) * 2010-03-01 2013-02-21 Ulrich Gmbh & Co. Kg Peristaltic pump
US9200628B2 (en) * 2010-03-01 2015-12-01 Ulrich Gmbh & Co. Kg Peristaltic pump with adjusting ring
US20160138589A1 (en) * 2013-06-13 2016-05-19 Continental Automotive Gmbh Pump for delivering a liquid
WO2015140206A1 (de) * 2014-03-19 2015-09-24 Continental Automotive Gmbh Pumpe zur förderung einer flüssigkeit, insbesondere zur förderung eines abgasreinigungsadditivs
US20170114691A1 (en) * 2014-03-19 2017-04-27 Continental Automotive Gmbh Pump for conveying a fluid, in particular for conveying an exhaust gas cleaning additive
US10072547B2 (en) * 2014-03-19 2018-09-11 Continental Automotive Gmbh Pump for conveying a fluid, in particular for conveying an exhaust gas cleaning additive
CN106103928B (zh) * 2014-03-19 2019-06-04 大陆汽车有限公司 用于输送液体、尤其是用于输送废气净化添加剂的泵
US10570738B2 (en) * 2015-04-29 2020-02-25 Ebm-Papst St. Georgen Gmbh & Co. Kg Pump device with deformable pump ring
CN111140477A (zh) * 2019-12-26 2020-05-12 深圳市洋沃电子有限公司 一种泵水装置及美发器

Also Published As

Publication number Publication date
JPS4949126B1 (ja) 1974-12-25
IL32709A (en) 1973-01-30
DE1934779C3 (de) 1975-02-27
BG15242A3 (bg) 1976-06-05
SE353132B (ja) 1973-01-22
AT291001B (de) 1971-06-25
ES369975A1 (es) 1971-07-16
FR2015343A1 (ja) 1970-04-24
BE736863A (ja) 1969-12-31
DE1934779A1 (de) 1970-01-29
DE1934779B2 (de) 1974-06-27
CH478346A (de) 1969-09-15
NL6911073A (ja) 1970-02-11
GB1280185A (en) 1972-07-05
IL32709A0 (en) 1969-09-25
RO54847A (ja) 1973-08-20

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