EP0437962A2 - Drehkolbenpumpe - Google Patents

Drehkolbenpumpe Download PDF

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Publication number
EP0437962A2
EP0437962A2 EP90314055A EP90314055A EP0437962A2 EP 0437962 A2 EP0437962 A2 EP 0437962A2 EP 90314055 A EP90314055 A EP 90314055A EP 90314055 A EP90314055 A EP 90314055A EP 0437962 A2 EP0437962 A2 EP 0437962A2
Authority
EP
European Patent Office
Prior art keywords
piston
working chamber
collar
cylindrical
suction
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.)
Withdrawn
Application number
EP90314055A
Other languages
English (en)
French (fr)
Other versions
EP0437962A3 (en
Inventor
Jan Pazdirek
Leopold Lacko
Frantisek Barina
Pavel Konecny
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.)
TRICOLOR LINE Ltd
Original Assignee
TRICOLOR LINE Ltd
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 TRICOLOR LINE Ltd filed Critical TRICOLOR LINE Ltd
Publication of EP0437962A2 publication Critical patent/EP0437962A2/de
Publication of EP0437962A3 publication Critical patent/EP0437962A3/en
Withdrawn legal-status Critical Current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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
    • F04C2/356—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F04C2/3568—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member with axially movable vanes

Definitions

  • the invention relates to a rotary pump comprising a rotary disc-shaped piston and a movable partition.
  • the pump is particularly suitable for pumping liquid substances containing incompressible admixtures and biological liquors which cannot be pumped by means of orthodox pumps.
  • the aim of the invention is to substantially mitigate some drawbacks of well-known pumps, such as relatively short life-time, limited piston revolution rate, and a questionable sealing of the sucking and discharge spaces from each other, which, as a rule, requires non-return valves.
  • the working chamber receives a piston in the form of a short cylindrical body whose height corresponds to that of said cylindrical working chamber.
  • a piston collar whose peripheral curve is an ellipse.
  • the major axis of the latter is identical with the diagonal of axial section of said cylindrical working chamber while its minor axis is identical with the diameter of said chamber.
  • the major axis of the ellipse includes with the axis of working chamber an angle of at most 30° which prevails also in contact points of the piston collar and the outer area of said cylindrical body.
  • the pump working stroke is also characterized by said angle.
  • a cylindrical sliding groove designed for receiving a movable cylindrical partition for separating the suction and the discharge space from each other.
  • the inlet opening of suction duct is circular while the outlet suction opening is triangular, the shape of inner surface of the suction duct simulating the shape of piston collar.
  • the discharge duct has a circular outlet discharge opening while the inlet discharge opening is of triangular configuration, the shape of inner surface of said discharge duct in the housing wall simulating the piston collar shape.
  • the ducts are being opened and closed, due to piston collar revolution while in the movable cylindrical partition there is freely mounted a sealing ball with a recess allowing the passage for the piston collar.
  • This passage depends upon the varying angle of turning of the piston collar, relative to the partition in a set of planes; thus the presence of said sealing ball makes it possible to build the piston collar in the form of a flat elliptical disc.
  • a higher effect of the invention consists in a relatively simple pump structure which is free of any suction or discharge valves.
  • the embodiment of the sealing partition together with the sealing ball enables a plain flat configuration of the piston collar to be used whereby claims laid on the manufacture thereof, in view of the hitherto applied pistons of more complicated shapes, are markedly reduced.
  • the pump operates quite smoothly, ie without pressure impacts.
  • the structure makes it possible to pump media containing even some minor incompressible objects, since the piston collar curve configuration and partition embodiment allow such media to be discharged without the piston being seized by such an incompressible object. It is why the pump of the invention is very suitable to be used for processing media of alimentary character as well as biotechnological liquid substances, since the pumping operation is very gentle.
  • the pump has a housing defined by a sidewall 1, which may be formed by two mutually opposite partial sidewalls, and two mutually opposite end walls, namely a front wall 3 and a back wall 2.
  • the housing provides in its interior a working chamber 10 of a substantially cylindrical configuration.
  • a cylindrical slide groove 16 for receiving a partition 8, the groove 16 being substantially parallel to the axis of the chamber 10.
  • the slide groove 16 extends through the end walls 2 and 3 into boxes 15 for said partition 8.
  • In the sidewall are provided at one side of the slide groove 16 the opening of a suction duct 4 and at the other side thereof the opening of a discharge duct 5. Both said openings are of a triangular configuration.
  • the ducts 4 and 5 merge into respective flanges 11 and 12 which are attached to the housing walls.
  • a suction conduit 13 in the flange 11 is of circular cross-section which gradually changes into a triangular one which is identical with the profile of the suction duct 4.
  • a discharge conduit 14 in the flange 12 changes its circular cross-section to a triangular one corresponding to the cross-section of the discharge duct 5.
  • the pump piston received in the working chamber 10 is constituted by a cylindrical body 6 and a piston collar 7 in the form of a flat elliptical disc which is situated obliquely on the cylindrical body 6.
  • the collar 7 includes with the axis of the body 6 and of the working chamber 10 an angle of at most 30°.
  • the peripheral curve of the piston collar 7 has the configuration of an ellipse whose major axis is identical with the diagonal of axial section of the cylindrical working chamber 10 ( Figure 4) while the minor axis thereof is identical with the diameter of said chamber 10 ( Figure 3).
  • the curve intersecting the piston collar 7 and the cylindrical body 6 is also constituted by an ellipse whose major axis is identical with the diagonal of axial section of said cylindrical body 6.
  • the piston collar 7 contacts in every point of its outer periphery the surface of the working chamber 10 ( Figure 6).
  • Figure 6 In the axis of the cylindrical body 6 and in the two end walls 2 and 3 is provided an opening for mounting a driving shaft of the piston.
  • the slide groove 16 receives slidably the movable cylindrical partition 8 in the middle of which a sealing ball 9 is freely mounted.
  • the ball 9 has a recess forming a passage for the piston collar 7.
  • the cylindrical piston body 6 together with the piston collar divide the working chamber 10 into two parts, each of which is in turn divided by the partition 8 in two parts so that four separate spaces are formed which revolve, owing to the rotation of the piston 6 with the collar 7, about the axis of the working chamber 10.
  • the working chamber 10 assumes alternately the suction and discharge function, the partition 8 separating in each phase the discharge space.
  • Figures 6a, 6b and 6c and 7a, 7b and 7c are perspective views of the surface of the working chamber, showing the suction and the discharge openings. Dashed line indicates the peripheral curve of the piston collar 7. These Figures show also the surface of the slide groove 16. For the sake of clarity, the piston and the partition have been omitted.
  • Figures 7a, 7b and 7c which correspond to Figures 6a, 6b and 6c, respectively, show the developed surface of the working chamber 10 together with peripheral curve of the piston collar 7 and the position of the partition 8.
  • FIGs 6a and 7a show the first pumping phase.
  • the piston collar 7 contacts the circular bases of the working chamber 10 at points B and D.
  • the partition is in this phase in its left-hand extreme position.
  • the suction duct is fully opened into the suction space in the right-hand portion of the working chamber while the discharge duct is fully opened into the discharge space in the right-hand portion of the working chamber.
  • the two spaces are separated from each other by the partition 8 and the piston collar 7 at the point D (see Figure 7a).
  • the suction has just ended, the suction duct has been closed and, due to the continuing turning of the piston, the discharge duct opened. At this instant, the suction space becomes the discharge one.
  • FIGs 6b and 7b show the next pumping phase.
  • the rotary piston has turned through 90° and the piston collar 7 has displaced the partition to its middle position.
  • vacuum begins to be produced in the new suction space in the left-hand portion of the working chamber 10.
  • the suction duct is opened into said space only partially and, as the piston turns, it is being further opened.
  • the left-hand suction space is separated from the left-hand discharge space by the partition 8 and the piston collar 7 at the point B (see Figure 7b).
  • the right-hand suction space is being gradually closed.
  • the discharge duct has been opened into the left-hand discharge space and as the piston turns, it is being further opened.
  • the discharge is being ended and the discharge duct, due to the rotation of the piston, is being closed.
  • the shapes of the suction and discharge ducts exactly simulate the shape of peripheral curve of the piston collar. It is further apparent that the suction or vacuum spaces are being enlarged proportionally to the closing of the suction duct; similarly, the discharge spaces are being reduced in dependence upon the opening of the discharge duct. Thus the pump operation is absolutely continuous, ie free of impacts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP19900314055 1990-01-15 1990-12-20 Rotary pump Withdrawn EP0437962A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CS90184A CS18490A3 (en) 1990-01-15 1990-01-15 Positive-displacement rotary sinusoidal pump
CS184/90 1990-01-15

Publications (2)

Publication Number Publication Date
EP0437962A2 true EP0437962A2 (de) 1991-07-24
EP0437962A3 EP0437962A3 (en) 1992-01-15

Family

ID=5333555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900314055 Withdrawn EP0437962A3 (en) 1990-01-15 1990-12-20 Rotary pump

Country Status (2)

Country Link
EP (1) EP0437962A3 (de)
CS (1) CS18490A3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222429A1 (de) * 1992-07-09 1994-01-20 Pkl Verpackungssysteme Gmbh Pumpe
KR100625207B1 (ko) 2004-01-26 2006-09-20 현경열 유체 펌프 및 모터
KR100679667B1 (ko) 2005-12-16 2007-02-07 현경열 회전형 2단 압축기
CN108087267A (zh) * 2017-12-13 2018-05-29 杭州电子科技大学 一种具有轴向端面面密封结构转子
CN111976471A (zh) * 2020-08-09 2020-11-24 肇庆高新区伙伴汽车技术有限公司 一种提高新能源汽车性价比的方法及其自动挡汽车

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE471573A (de) *
GB191117366A (en) * 1911-07-29 1912-07-25 Pittler Universal Rotary Machi Improvements in Rotary Pumps and similar Rotary Machines.
GB352526A (en) * 1930-04-04 1931-07-06 John James Owen Wedge effect rotary pump
US2628566A (en) * 1948-11-09 1953-02-17 Berner Leo Torque converter
US4093408A (en) * 1976-12-03 1978-06-06 Yoshichika Yamaguchi Positive cam type compressor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4222429A1 (de) * 1992-07-09 1994-01-20 Pkl Verpackungssysteme Gmbh Pumpe
KR100625207B1 (ko) 2004-01-26 2006-09-20 현경열 유체 펌프 및 모터
KR100679667B1 (ko) 2005-12-16 2007-02-07 현경열 회전형 2단 압축기
CN108087267A (zh) * 2017-12-13 2018-05-29 杭州电子科技大学 一种具有轴向端面面密封结构转子
CN111976471A (zh) * 2020-08-09 2020-11-24 肇庆高新区伙伴汽车技术有限公司 一种提高新能源汽车性价比的方法及其自动挡汽车

Also Published As

Publication number Publication date
CS18490A3 (en) 1992-05-13
EP0437962A3 (en) 1992-01-15

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