US3771901A - Rotary pump - Google Patents

Rotary pump Download PDF

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Publication number
US3771901A
US3771901A US00233692A US3771901DA US3771901A US 3771901 A US3771901 A US 3771901A US 00233692 A US00233692 A US 00233692A US 3771901D A US3771901D A US 3771901DA US 3771901 A US3771901 A US 3771901A
Authority
US
United States
Prior art keywords
pump
diaphragm
vanes
rotor
chamber
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
US00233692A
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English (en)
Inventor
S Svensson
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.)
Alfa Laval AB
Original Assignee
Alfa Laval AB
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 Alfa Laval AB filed Critical Alfa Laval AB
Application granted granted Critical
Publication of US3771901A publication Critical patent/US3771901A/en
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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C5/00—Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D1/00—Apparatus or devices for dispensing beverages on draught
    • B67D1/08—Details
    • B67D1/10—Pump mechanism

Definitions

  • ABSTRACT The peripheral wall of the pump chamber includes a Mar. 16, 1971 Sweden 3347/71 surface of revolution having its axis coinciding with 52 US. c1. 418/156 that of the P rotor the latter being Provided with 51 1m. (:1. ..F01 5 04 radial vanes cooperating with Said Peripheral Wall to 158 Field of Search 418/152, 153, 156; divide the chamber into a Suction Side and a Pressure 73/262 side.
  • a diaphragm having an inner surface forming part of said peripheral wall is urged against the pump 5 References Cited rotor by an air cushion enclosed in a space defined by UNITED STATES PATENTS the diaphragm and a bowl seated against the diaphragm s outer surface.
  • the present invention relates to pumps of the type comprising a pump rotor which is journalled concentrically in a pump chamber defined by a surface of revolution and which is provided with radially directed vanes cooperating with the pump chamber wall to divide the pump chamber into a suction side and a pressure side, the outer edges of the vanes forming generatrices of the surface of revolution.
  • Pumps having a pump rotor journalled eccentrically in the pump chamber and provided with vanes of rubber have been used for pumping liquids, such as milk. Due to the eccentric journalling of the pump rotor, the vanes are folded and unfolded with a high frequency at their attachments adjacent to the pump rotor, while dragging against the pump chamber wall due to the centrifugal force. This rapid and severe flexing of the pump rotor vanes causes the vane material to become fatigued so that the vanes are torn off. As soon as the vane has been torn off, the entire pump rotor must be exchanged, which means expensive pump repairs.
  • An object of the present invention is to provide a durable pump which is also easy to clean, which latter circumstance is of importance when the pump is used for liquids of the character of food, such as milk.
  • the pump according to the invention is characterized in that a part of the pump chambers peripheral wall is formed by a diaphragm and that a bowl engaging the outside of the diaphragm encloses, in cooperation with the diaphragm, an air cushion which maintains the diaphragm against the pump rotor.
  • the vanes can be quite rigid and consequently are not worn out through a high frequency folding.
  • the dividing of the pump chamber into a suction side and a pressure side is effected by the cooperation of the vanes with the resilient diaphragm, which is urged against the pump rotor and consequently against passing vanes.
  • the diaphragm is subjected only to bulging movements and thus has a lifetime many times greater than that of the rubber vanes of the prior pumps.
  • the rubber diaphragm is very cheap to exchange, compared with a pump rotor having rubber vanes.
  • the diaphragm has an oval shape and is inserted in a circular space, it lies effectively against the pump rotor, especially under the influence of said air cushion.
  • three pump vanes are used, since this number is sufficient for giving the pump a good volumetric efficiency.
  • the pump rotor vanes are placed obliquely in relation to the axial direction. This oblique position of the vanes makes it possible for the aforementioned liquid quantity to flow back in the direction toward the pump outlet, whereby the volumetric efficiency of ,the pump is increased.
  • the diaphragm is subjected to .a certain wear.
  • This wear can be reduced appreciably by shaping the edges of the vanes substantially as an. arc of a circle, the surface of the pump chamber being shaped correspondingly (preferably about spherical).
  • FIG. 1 is a sectional view of an example of the new pump, taken at right angles to the axis of rotation of its rotor, and
  • FIG. 2 is a longitudinal sectional view of the same example, showing the rotor in side elevation.
  • a pump housing 1 has a generally spherical pump chamber 2 provided with an inlet 3 and an outlet 4.
  • a pump rotor 5 with three vanes 6 is journalled concen'trically in the pump chamber 2.
  • the direction of rotation of the pump rotor is indicated by an arrow, shown in the pump chamber.
  • an oval rubber diaphragm 7 lies in a circular space 8 against the pump rotor body 5 proper and the two upper vanes 6.
  • the rubber diaphragm is clamped in the pump housing 1 by means of an inverted bowl 9, which is secured to the housing 1 by suitable clamping means (not shown) of conventional form.
  • the bowl 9 encloses above the diaphragm an air cushion, which keeps the diaphragm pressed against the rotor 5.
  • each vane 6 forms an arc of a circle so that it conforms to the arcuate shape of the chamber wall 2a.
  • the vanes As shown in FIG. 2, the edge of each vane 6 forms an arc of a circle so that it conforms to the arcuate shape of the chamber wall 2a.
  • the vans are disposed obliquely in relation to the axial direction.
  • the pump rotor 5 has two gudgeons l0 journalled in corresponding recesses in the pump housing, and the right-hand gudgeon is connected to a shaft 11 of a driving motor (not shown). The lead-through of the shaft 11 in the pump housing is sealed by means of a gasket 12.
  • the right-hand gudgeon 10 has a diametrical groove (not shown) which receives a corresponding driving projection (not shown) on'the shaft 11.
  • the vanes 6 would, when passing the diaphragm, entrain a liquid quantity confined between the diaphragm and the vanes. Through said oblique positioning of the vanes, however, such liquid quantity will slide along the entraining vane in the direction toward the pump outlet 4, whereby the volumetric efficiency of the pump is increased.
  • a pump comprising means defining a pump chamber, said chamber having a peripheral wall including a surface of revolution and also having an inlet and an outlet, a rotor journalled in the housing for rotation in said chamber about an axis concentric to said surface of revolution, the rotor having vanes extending radially outward and cooperating with said peripheral wall to divide the chamber into a suction side and a pressure side communicating with said inlet and said outlet, respectively, the outer edges of said vanes forming generatrices of said surface of revolution, said means including a flexible diaphragm having an inner surface forming part of said peripheral wall and engageable with each said vane along the entire outer edge thereof, a
  • a pump according to claim 3 in which said vanes extend obliquely relative to said rotation axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
US00233692A 1971-03-16 1972-03-10 Rotary pump Expired - Lifetime US3771901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE03347/71A SE351011B (zh) 1971-03-16 1971-03-16

Publications (1)

Publication Number Publication Date
US3771901A true US3771901A (en) 1973-11-13

Family

ID=20261927

Family Applications (1)

Application Number Title Priority Date Filing Date
US00233692A Expired - Lifetime US3771901A (en) 1971-03-16 1972-03-10 Rotary pump

Country Status (7)

Country Link
US (1) US3771901A (zh)
DD (1) DD98142A5 (zh)
DE (1) DE2211819A1 (zh)
FR (1) FR2129654A5 (zh)
GB (1) GB1330082A (zh)
IT (1) IT950005B (zh)
SE (1) SE351011B (zh)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060051228A1 (en) * 2004-09-07 2006-03-09 Hayes-Pankhurst Richard P Pumps
US20120034122A1 (en) * 2009-04-21 2012-02-09 Pdd Innovations Limited Pump with a resilient seal
US20120046785A1 (en) * 2010-08-20 2012-02-23 Pepsico, Inc. Bag-in-Box Pump System
WO2012042214A1 (en) 2010-09-29 2012-04-05 Acuwomen Limited Fluid dispensing equipment
US20160010634A1 (en) * 2013-03-05 2016-01-14 Quantex Patents Limited Pumps
US9581157B2 (en) 2011-10-07 2017-02-28 Quantex Patents Limited Pump having a housing and a rotor capable of rotating in the housing
US9638204B2 (en) 2012-10-15 2017-05-02 Quantex Patents Ltd Pump and its manufacturing method
GB2547051A (en) * 2016-02-08 2017-08-09 Quantex Patents Ltd Pump assembly
US9816520B2 (en) 2011-10-07 2017-11-14 Quantex Patents Limited Pump fittings and methods for their manufacture
US20180274537A1 (en) * 2017-03-22 2018-09-27 Ali Group S.R.L. Pump for dispensing liquid or semi-liquid or semi-solid food products and machine comprising said pump
US20200003197A1 (en) * 2018-06-29 2020-01-02 Bendix Commercial Vehicle Systems Llc Hypocycloid Compressor
EP3650694A4 (en) * 2017-07-26 2020-05-13 Shi, Yuyang LIQUID PUMPING DEVICE

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916252A1 (de) * 1999-04-12 2000-11-02 Hoka Gmbh Pumpe für geringe Volumenströme

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409688A (en) * 1942-07-01 1946-10-22 Moineau Rene Joseph Louis Reversible fluid-operated and fluidoperating mechanism
US2625885A (en) * 1948-03-04 1953-01-20 Fmc Corp Ink pump
US2695694A (en) * 1951-11-03 1954-11-30 Seinfeld Emmy Margaret Diaphragm mechanism for pump clutches
US2738775A (en) * 1952-03-10 1956-03-20 Elmer D Smyser Fluid meters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409688A (en) * 1942-07-01 1946-10-22 Moineau Rene Joseph Louis Reversible fluid-operated and fluidoperating mechanism
US2625885A (en) * 1948-03-04 1953-01-20 Fmc Corp Ink pump
US2695694A (en) * 1951-11-03 1954-11-30 Seinfeld Emmy Margaret Diaphragm mechanism for pump clutches
US2738775A (en) * 1952-03-10 1956-03-20 Elmer D Smyser Fluid meters

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE44841E1 (en) * 2004-09-07 2014-04-15 Quantex Patents Limited Pump with conveying chamber formed in outer rotor surface
WO2006027548A1 (en) * 2004-09-07 2006-03-16 Pdd Innovations Limited Rotary pump with resiliently deformed seal
JP2008512595A (ja) * 2004-09-07 2008-04-24 ピーディーディー イノベーションズ リミテッド 可撓性を有するシール材を備えたロータリポンプ
US7674100B2 (en) * 2004-09-07 2010-03-09 Pdd Innovations Ltd. Pump with conveying chamber formed in outer rotor surface
USRE47590E1 (en) * 2004-09-07 2019-09-03 Quantex Patents Limited Pump with conveying chamber formed in outer rotor surface
US20060051228A1 (en) * 2004-09-07 2006-03-09 Hayes-Pankhurst Richard P Pumps
CN102449265B (zh) * 2009-04-21 2014-06-18 奎安特克斯专利有限公司 具有弹性密封件的泵
CN102449265A (zh) * 2009-04-21 2012-05-09 奎安特克斯专利有限公司 具有弹性密封件的泵
US9175681B2 (en) * 2009-04-21 2015-11-03 Quantex Patents Limited Pump with a resilient seal
US10465681B2 (en) * 2009-04-21 2019-11-05 Quantex Patents Limited Pump with a resilient seal
US20120034122A1 (en) * 2009-04-21 2012-02-09 Pdd Innovations Limited Pump with a resilient seal
US9850118B2 (en) * 2010-08-20 2017-12-26 Pepsico, Inc. Bag-in-box pump system
US20120046785A1 (en) * 2010-08-20 2012-02-23 Pepsico, Inc. Bag-in-Box Pump System
WO2012042214A1 (en) 2010-09-29 2012-04-05 Acuwomen Limited Fluid dispensing equipment
US9581157B2 (en) 2011-10-07 2017-02-28 Quantex Patents Limited Pump having a housing and a rotor capable of rotating in the housing
US9816520B2 (en) 2011-10-07 2017-11-14 Quantex Patents Limited Pump fittings and methods for their manufacture
US9638204B2 (en) 2012-10-15 2017-05-02 Quantex Patents Ltd Pump and its manufacturing method
US9995296B2 (en) * 2013-03-05 2018-06-12 Quantex Patents Limited Pumps
US20160010634A1 (en) * 2013-03-05 2016-01-14 Quantex Patents Limited Pumps
GB2547051A (en) * 2016-02-08 2017-08-09 Quantex Patents Ltd Pump assembly
US10935025B2 (en) 2016-02-08 2021-03-02 Quantex Patents Limited Pump assembly
US20180274537A1 (en) * 2017-03-22 2018-09-27 Ali Group S.R.L. Pump for dispensing liquid or semi-liquid or semi-solid food products and machine comprising said pump
US10570897B2 (en) * 2017-03-22 2020-02-25 Ali Group S.R.L. Pump for dispensing liquid or semi-liquid or semi-solid food products and machine comprising said pump
EP3650694A4 (en) * 2017-07-26 2020-05-13 Shi, Yuyang LIQUID PUMPING DEVICE
US11187228B2 (en) * 2017-07-26 2021-11-30 Yuyang SHI Liquid pumping device with concave caves and convex liquid extruding component
US20200003197A1 (en) * 2018-06-29 2020-01-02 Bendix Commercial Vehicle Systems Llc Hypocycloid Compressor
US10920758B2 (en) * 2018-06-29 2021-02-16 Bendix Commercial Vehicle Systems Llc Hypocycloid compressor

Also Published As

Publication number Publication date
DE2211819A1 (de) 1972-11-30
GB1330082A (en) 1973-09-12
SE351011B (zh) 1972-11-13
FR2129654A5 (zh) 1972-10-27
AU3965872A (en) 1973-05-03
IT950005B (it) 1973-06-20
DD98142A5 (zh) 1973-06-05

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