US20120156074A1 - Peristaltic Pump - Google Patents
Peristaltic Pump Download PDFInfo
- Publication number
- US20120156074A1 US20120156074A1 US13/392,322 US201013392322A US2012156074A1 US 20120156074 A1 US20120156074 A1 US 20120156074A1 US 201013392322 A US201013392322 A US 201013392322A US 2012156074 A1 US2012156074 A1 US 2012156074A1
- Authority
- US
- United States
- Prior art keywords
- stator
- rotor
- hose
- peristaltic pump
- conveying elements
- 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.)
- Abandoned
Links
Images
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
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
-
- 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
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
- F04B43/1261—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing the rollers being placed at the outside of the tubular flexible member
Definitions
- the invention relates to a peristaltic pump for conveying fluids, comprising a stator and a rotor supported therein, wherein a flexible hose is integrated in the stator and the rotor comprises radially arranged conveying elements which squeeze the hose over a section containing the fluid, and wherein the squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor.
- a peristaltic pump is a positive displacement pump in which the medium to be conveyed is pushed through a hose by the external mechanical deformation thereof.
- German Patent Document DE 10 2008 002 761 A1 discloses an example of such a pump.
- a drawback of these pumps the high frictional forces occurring between the hose and the conveying elements when the hose is squeezed. As a result of these increased frictional forces, both the transmission driving the rotor of the peristaltic pump and the hose itself are subjected to heavy loading.
- Exemplary embodiments of the present invention are directed to a peristaltic pump having a long service life, in which the transmission and conveying medium hose are prevented from becoming damaged during operation.
- the peristaltic pump comprises a stator and rotor supported therein, wherein a flexible hose is integrated in the stator, and the rotor comprises radially arranged conveying elements which squeeze the hose over a section containing the fluid, and wherein the squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor.
- the conveying elements are designed as rotatably mounted rollers which comprise at least two rolling bearings, of which the outer rings are connected via a common outer sleeve and of which the inner rings are connected to the rotor, wherein, under the effect of the motor, the rotor moves in the stator and the outer rings of the conveying elements roll on the inner surface of the stator.
- Rolling bearings also known as ball bearings, are bearings in which two components that are movable relative to one another, namely the “inner ring” and the “outer ring”, are separated by rolling bodies. They are used to support radial and axial forces in axles and shafts and are intended to minimize the power loss and wear caused by friction. Rolling friction primarily occurs between the three main components, the inner ring, outer ring and rolling bodies. Since the rolling bodies in the inner and outer rings roll on hardened steel surfaces with optimized lubrication, the rolling friction of these bearings is relatively low.
- FIG. 1 is a schematic view of a pump head of a peristaltic pump according to the invention
- FIG. 2 is a view along the sectional line A-A in FIG. 1 of a conveying means according to the invention.
- FIG. 1 shows a peristaltic pump 1 for conveying fluids.
- the peristaltic pump comprises a stator 4 , in which a flexible hose 3 is integrated over a substantially circular path (approximately 360°).
- a rotor 5 is supported in the stator 4 .
- the rotor has radially arranged conveying elements 2 a, 2 b, 2 c.
- the conveying elements 2 a, 2 b squeeze the hose 3 in the section 10 .
- a motor not illustrated in greater detail, cooperates with the rotor 5 and, in particular, moves the squeezed fluid section 10 progressively in the hose 3 in accordance with the direction of the arrow.
- the fluid is thus conveyed in the section 10 from the inlet E of the peristaltic pump 1 to the outlet A of the pump 1 .
- conveyance may also occur in a direction opposite that of the arrow.
- the peristaltic pump 1 may be used both for pumping and for suction.
- the hose 3 is fixed in a hose clamp 9 in the region of the inlet E and of the outlet A of the pump 1 , wherein the hose clamp 9 is connected to the stator 4 .
- the conveying hose 3 is surrounded and guided almost completely by the stator 4 .
- a valve function of the pump 1 is thus achieved. If the rotor 5 is idle, at least two conveying elements 2 press the hose 3 so that the path for the fluid is blocked.
- FIG. 2 shows a sectional view along the sectional line A-A in FIG. 1 of a conveying element 2 of the pump according to the invention.
- the conveying element 2 comprises two rolling bearings 6 a, 6 b.
- Each rolling bearing 6 a, 6 b consists of an inner ring 8 a and an outer ring 7 a.
- the rolling bodies 11 are located between the inner ring 8 a and the outer ring 7 a.
- the inner rings 8 a of the two rolling bearings 6 a, 6 b are connected rigidly to one another and to the rotor 5 .
- the outer rings 7 a of the two rolling bearings 6 a, 6 b are interconnected and form a type of outer sleeve 7 of the conveying element 2 . There is no connection between the rotor 5 and the outer sleeve 7 . It is thus ensured that the outer sleeve 7 is mounted rotatably about the axis D.
- FIG. 2 also shows the stator 4 and the hose 3 squeezed between the stator 4 and the outer sleeve 7 .
- the bearings 6 a, 6 b are connected to a common outer sleeve 7 , which prevents tilting of the outer rings 7 a of the rolling bearings.
- the pump can be adapted to different hose thicknesses or pumping pressures by varying the thickness of the outer sleeve 7 .
- the outer sleeve 7 provides the hose 3 with a smooth outer surface. This increases the service life of the rolling bearings 6 a, 6 b, of the hose 3 and of the transmission.
- each conveying element 2 a, 2 b, 2 c thus rolls on the hose 3 with virtually no frictional forces.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
A peristaltic pump for conveying fluids includes a stator and a rotor supported therein. A flexible hose is integrated in the stator and the rotor includes radially arranged conveying elements which squeeze the hose over a section containing the fluid. The squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor. The conveying elements are designed as rotatably mounted rollers that include at least two rolling bearings, of which the outer rings are connected via a common outer sleeve and of which the inner rings are connected to the rotor. Under the effect of the motor, the rotor moves in the stator and the outer rings of the conveying elements roll on the inner surface of the stator.
Description
- The invention relates to a peristaltic pump for conveying fluids, comprising a stator and a rotor supported therein, wherein a flexible hose is integrated in the stator and the rotor comprises radially arranged conveying elements which squeeze the hose over a section containing the fluid, and wherein the squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor.
- A peristaltic pump is a positive displacement pump in which the medium to be conveyed is pushed through a hose by the external mechanical deformation thereof. German
Patent Document DE 10 2008 002 761 A1 discloses an example of such a pump. A drawback of these pumps the high frictional forces occurring between the hose and the conveying elements when the hose is squeezed. As a result of these increased frictional forces, both the transmission driving the rotor of the peristaltic pump and the hose itself are subjected to heavy loading. - Exemplary embodiments of the present invention are directed to a peristaltic pump having a long service life, in which the transmission and conveying medium hose are prevented from becoming damaged during operation.
- The peristaltic pump according to the invention comprises a stator and rotor supported therein, wherein a flexible hose is integrated in the stator, and the rotor comprises radially arranged conveying elements which squeeze the hose over a section containing the fluid, and wherein the squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor. According to the invention, the conveying elements are designed as rotatably mounted rollers which comprise at least two rolling bearings, of which the outer rings are connected via a common outer sleeve and of which the inner rings are connected to the rotor, wherein, under the effect of the motor, the rotor moves in the stator and the outer rings of the conveying elements roll on the inner surface of the stator.
- Rolling bearings, also known as ball bearings, are bearings in which two components that are movable relative to one another, namely the “inner ring” and the “outer ring”, are separated by rolling bodies. They are used to support radial and axial forces in axles and shafts and are intended to minimize the power loss and wear caused by friction. Rolling friction primarily occurs between the three main components, the inner ring, outer ring and rolling bodies. Since the rolling bodies in the inner and outer rings roll on hardened steel surfaces with optimized lubrication, the rolling friction of these bearings is relatively low.
- The invention will be explained in greater detail hereinafter with reference to figures, in which
-
FIG. 1 is a schematic view of a pump head of a peristaltic pump according to the invention, -
FIG. 2 is a view along the sectional line A-A inFIG. 1 of a conveying means according to the invention. -
FIG. 1 shows aperistaltic pump 1 for conveying fluids. The peristaltic pump comprises astator 4, in which aflexible hose 3 is integrated over a substantially circular path (approximately 360°). As is illustrated inFIG. 1 by the arrow, arotor 5 is supported in thestator 4. The rotor has radially arranged conveyingelements conveying elements hose 3 in thesection 10. A motor, not illustrated in greater detail, cooperates with therotor 5 and, in particular, moves the squeezedfluid section 10 progressively in thehose 3 in accordance with the direction of the arrow. The fluid is thus conveyed in thesection 10 from the inlet E of theperistaltic pump 1 to the outlet A of thepump 1. Of course, conveyance may also occur in a direction opposite that of the arrow. In this case theperistaltic pump 1 may be used both for pumping and for suction. - The
hose 3 is fixed in ahose clamp 9 in the region of the inlet E and of the outlet A of thepump 1, wherein thehose clamp 9 is connected to thestator 4. - The
conveying hose 3 is surrounded and guided almost completely by thestator 4. A valve function of thepump 1 is thus achieved. If therotor 5 is idle, at least twoconveying elements 2 press thehose 3 so that the path for the fluid is blocked. -
FIG. 2 shows a sectional view along the sectional line A-A inFIG. 1 of a conveyingelement 2 of the pump according to the invention. Theconveying element 2 comprises tworolling bearings inner ring 8 a and anouter ring 7 a. Therolling bodies 11 are located between theinner ring 8 a and theouter ring 7 a. Theinner rings 8 a of the tworolling bearings rotor 5. Theouter rings 7 a of the tworolling bearings outer sleeve 7 of theconveying element 2. There is no connection between therotor 5 and theouter sleeve 7. It is thus ensured that theouter sleeve 7 is mounted rotatably about the axis D. -
FIG. 2 also shows thestator 4 and thehose 3 squeezed between thestator 4 and theouter sleeve 7. - The
bearings outer sleeve 7, which prevents tilting of theouter rings 7 a of the rolling bearings. In addition, the pump can be adapted to different hose thicknesses or pumping pressures by varying the thickness of theouter sleeve 7. Moreover, theouter sleeve 7 provides thehose 3 with a smooth outer surface. This increases the service life of therolling bearings hose 3 and of the transmission. During pumping or suction operation of thepump 1, each conveyingelement hose 3 with virtually no frictional forces. - The foregoing disclosure has been set forth merely to illustrate the invention and is not intended to be limiting. Since modifications of the disclosed embodiments incorporating the spirit and substance of the invention may occur to persons skilled in the art, the invention should be construed to include everything within the scope of the appended claims and equivalents thereof.
Claims (4)
1-3. (canceled)
4. A peristaltic pump for conveying fluids, comprising:
a stator with an integrated flexible hose;
a rotor supported in the stator, wherein the rotor comprises radially arranged conveying elements configured to squeeze the hose over a section containing the fluid, and wherein the squeezed fluid section moves progressively in the hose under the effect of a motor connected to the rotor,
wherein the conveying elements are rotatably mounted rollers comprising at least two rolling bearings, of which outer rings are connected via a common outer sleeve and inner rings are connected to the rotor, and
wherein, under the effect of the motor, the rotor moves in the stator and the outer rings of the conveying elements roll on the inner surface of the stator.
5. The peristaltic pump as claimed in claim 4 , wherein the hose extends within the stator over a substantially circular path.
6. The peristaltic pump as claimed in claim 4 , wherein the hose is arranged in a region of an inlet to and of an outlet from the peristaltic pump with a common hose clamp that is connected to the stator.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202009011493U DE202009011493U1 (en) | 2009-08-26 | 2009-08-26 | peristaltic pump |
DE102009011493.7 | 2009-08-26 | ||
PCT/DE2010/000120 WO2011023150A1 (en) | 2009-08-26 | 2010-02-04 | Peristaltic pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120156074A1 true US20120156074A1 (en) | 2012-06-21 |
Family
ID=41269206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/392,322 Abandoned US20120156074A1 (en) | 2009-08-26 | 2010-02-04 | Peristaltic Pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120156074A1 (en) |
EP (1) | EP2470791A1 (en) |
CN (1) | CN102713290B (en) |
DE (1) | DE202009011493U1 (en) |
WO (1) | WO2011023150A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9746412B2 (en) | 2012-05-30 | 2017-08-29 | Iris International, Inc. | Flow cytometer |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106321428A (en) * | 2015-06-30 | 2017-01-11 | 熵零股份有限公司 | Gas compression method |
CN108561297B (en) * | 2018-04-10 | 2023-09-01 | 杭州启飞智能科技有限公司 | Single-head single-rotor double-tube peristaltic pump |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4060348A (en) * | 1975-07-01 | 1977-11-29 | Bioengineering Research S.A. | Roller pump carrying out alternate pumping operations, particularly suited to extra-corporeal blood circulation |
US4530647A (en) * | 1983-04-01 | 1985-07-23 | Unolab Co., Ltd. | Peristaltic pump having conical rollers |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4288205A (en) * | 1980-01-18 | 1981-09-08 | Pako Corporation | Variable volume peristaltic pump |
US4487558A (en) * | 1982-08-23 | 1984-12-11 | Extracorporeal Medical Specialties, Inc. | Peristaltic pump |
CN2344585Y (en) * | 1997-07-11 | 1999-10-20 | 马连发 | Hose pump |
CN2526532Y (en) * | 2001-12-10 | 2002-12-18 | 东华工程科技股份有限公司 | Semi-sealed/full-sealed hose pump |
CN100344874C (en) * | 2003-01-28 | 2007-10-24 | 清华大学 | Fluid transmission method and minisize peristaltic pump for realizing the same |
FR2872553B1 (en) * | 2004-06-30 | 2006-09-22 | Millipore Corp | PERISTALTIC PUMP COMPRISING A SUPPORT MEMBER AND A BACK SUPPORT SUITABLE FOR COOPERATING WITH A TUBE |
WO2006110510A2 (en) * | 2005-04-07 | 2006-10-19 | Bobo Marion H | A head for peristaltic pump |
CN101421517A (en) * | 2006-04-12 | 2009-04-29 | 科尔帕默器具公司 | Marked tube for a peristaltic pump |
CN200952462Y (en) * | 2006-08-30 | 2007-09-26 | 陈明 | High precision metering creeping pump |
CN100534540C (en) * | 2006-10-23 | 2009-09-02 | 圣美申医疗科技(上海)有限公司 | A power transfusion device used in the portable intravenous injection system |
CN201133339Y (en) * | 2007-11-29 | 2008-10-15 | 上海科华实验系统有限公司 | Peristaltic pump for sample adding liquid |
DE102008002761A1 (en) | 2008-01-31 | 2009-08-06 | Fachhochschule Bielefeld | Peristaltic pump for conveying fluids |
-
2009
- 2009-08-26 DE DE202009011493U patent/DE202009011493U1/en not_active Expired - Lifetime
-
2010
- 2010-02-04 WO PCT/DE2010/000120 patent/WO2011023150A1/en active Application Filing
- 2010-02-04 US US13/392,322 patent/US20120156074A1/en not_active Abandoned
- 2010-02-04 CN CN201080036537.3A patent/CN102713290B/en not_active Expired - Fee Related
- 2010-02-04 EP EP10718837A patent/EP2470791A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4060348A (en) * | 1975-07-01 | 1977-11-29 | Bioengineering Research S.A. | Roller pump carrying out alternate pumping operations, particularly suited to extra-corporeal blood circulation |
US4530647A (en) * | 1983-04-01 | 1985-07-23 | Unolab Co., Ltd. | Peristaltic pump having conical rollers |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9746412B2 (en) | 2012-05-30 | 2017-08-29 | Iris International, Inc. | Flow cytometer |
US10126227B2 (en) | 2012-05-30 | 2018-11-13 | Iris International, Inc. | Flow cytometer |
US10209174B2 (en) | 2012-05-30 | 2019-02-19 | Iris International, Inc. | Flow cytometer |
US10330582B2 (en) | 2012-05-30 | 2019-06-25 | Iris International, Inc. | Flow cytometer |
US11255772B2 (en) | 2012-05-30 | 2022-02-22 | Iris International, Inc. | Flow cytometer |
US11703443B2 (en) | 2012-05-30 | 2023-07-18 | Iris International, Inc. | Flow cytometer |
Also Published As
Publication number | Publication date |
---|---|
EP2470791A1 (en) | 2012-07-04 |
CN102713290A (en) | 2012-10-03 |
CN102713290B (en) | 2016-11-16 |
WO2011023150A1 (en) | 2011-03-03 |
DE202009011493U1 (en) | 2009-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ASTRIUM GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KUSCH, ENGELBERT;SCHWARZWAELDER, ACHIM;EISENBERG, TILL;AND OTHERS;SIGNING DATES FROM 20120220 TO 20120222;REEL/FRAME:027944/0705 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |