EP0363420B1 - Pompe - Google Patents

Pompe Download PDF

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Publication number
EP0363420B1
EP0363420B1 EP88905368A EP88905368A EP0363420B1 EP 0363420 B1 EP0363420 B1 EP 0363420B1 EP 88905368 A EP88905368 A EP 88905368A EP 88905368 A EP88905368 A EP 88905368A EP 0363420 B1 EP0363420 B1 EP 0363420B1
Authority
EP
European Patent Office
Prior art keywords
rotors
rotor
pump
longitudinal axis
transverse axes
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
EP88905368A
Other languages
German (de)
English (en)
Other versions
EP0363420B2 (fr
EP0363420A1 (fr
Inventor
Paul G. Langer
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.)
Herold and Co GmbH
Original Assignee
Herold and Co GmbH
BSA Maschinenfabrik Paul G Langer 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6329129&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0363420(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Herold and Co GmbH, BSA Maschinenfabrik Paul G Langer GmbH filed Critical Herold and Co GmbH
Priority to AT88905368T priority Critical patent/ATE61083T1/de
Publication of EP0363420A1 publication Critical patent/EP0363420A1/fr
Application granted granted Critical
Publication of EP0363420B1 publication Critical patent/EP0363420B1/fr
Publication of EP0363420B2 publication Critical patent/EP0363420B2/fr
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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F01C1/126—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with elements extending radially from the rotor body not necessarily cooperating with corresponding recesses in the other rotor, e.g. lobes, Roots type

Definitions

  • the invention relates to a pump with a housing formed from two intersecting cylinder sections, wherein at least one inlet and outlet opening is provided in the cutting area opposite each other and in each cylinder section a rotor rotatable about its central longitudinal axis is arranged, the larger transverse axes of the rotor in at least a phase of movement are approximately perpendicular to each other and the runners roll tightly against each other and against the inner wall of the housing, and wherein the surface lines of each rotor starting from the intersection of the large transverse axis run obliquely in opposite directions to the respective central longitudinal axis, with the rotation of the two in each phase Runner a uniformly increasing suction volume in front of the inlet opening and a uniformly smaller suction volume in front of the outlet opening is formed.
  • Roots pumps which are presumed to be known, are referred to as Roots pumps or Roots housings and have long been proven in practical use.
  • the rotors of conventional Roots pumps of this type have lateral surfaces which run parallel to the central longitudinal axis of the rotor and thus perpendicular to the flow direction defined by the inlet and outlet openings. Due to this construction of conventional pumps of this type, the pumped medium pulsates relatively strongly as a function of the respective rotational angle position of the rotor.
  • the object of the invention is to improve a pump of the generic type while preserving its basic advantages in such a way that a pulsation-free, uniform flow of the pumped medium is achieved with a high delivery capacity while avoiding dead spaces.
  • each runner comprises two approximately club-shaped sections which are connected to one another at their narrower end by a constriction, the runners having such a configuration and being arranged relative to one another that when the large transverse axes of the two runners are perpendicular to one another stand, the club-shaped section of one runner engages in the constriction of the other runner and the two runners roll against each other in a sealing manner.
  • the two halves of each runner are twisted relative to one another about the central longitudinal axis in the embodiment according to the invention, so that these oblique surface lines are created.
  • the two runners are in turn arranged on the two axes of rotation so that the surface lines in the sealing area of the two runners each run parallel to one another. This means that the lateral surfaces of the runners can roll against one another in a sealing manner, as is provided in conventionally known runners.
  • the configuration of the runners according to the invention can be produced with modern CNC-controlled machines with a reasonable effort compared to the considerable achievable advantages.
  • the rotor configuration according to the invention avoids cavities which increase the drive resistance in the rolling motion of the rotors to one another and relative to the housing and enables very substantial delivery rates to be achieved in relation to the pump volume and the required drive power.
  • the construction according to the invention enables a contact-free flow and return as well as the pumping of both gaseous and liquid media.
  • a pump shown in the drawing has a pump housing 1, which consists of two intersecting cylinder sections 2, 3.
  • an inlet opening 4 and an outlet opening 5 are provided on the surface of the cylinder.
  • the inlet opening 4 and the outlet opening 5 are located diametrically opposite one another, as can be seen in FIG. 1b, and have an approximately trapezoidal cross section. Deviating from this, however, a rectangular cross section can also be provided for these openings 4, 5.
  • a runner 6, 7 is arranged in the interior of each cylinder section 2, 3, the central longitudinal axis 8 or 9 of which runs parallel to the central longitudinal axis of the respective cylinder section 2 or 3.
  • the rotors 6 and 7 are driven in rotation in the opposite direction (arrows 16, 11) about their central longitudinal axes 8 and 9.
  • the coordinated drive of both runners 6, 7 can e.g. by meshing gears on the axles 8, 9, which are accommodated in the housing part 12, are accomplished.
  • Each runner 6 or 7 comprises, in a manner known per se, two approximately club-shaped sections 13 which are connected via a constriction 14, i.e. the runners have such a configuration that when the large transverse axes 15 and 16 of the two runners 6 and 7 are perpendicular to one another, the club-shaped section 13 of one runner engages in the constriction 14 of the other runner and the two runners seal against one another can pass on.
  • 1b shows a movement phase where the transverse axes 15, 16 are just perpendicular to one another and the club-like section 13 of the rotor 7 engages in the constriction 14 of the rotor 6. Based on this situation shown in FIG. 1 b, it is conceivable how the two runners 6, 7 roll against each other during a rotary movement in the direction of the arrows 10, 11.
  • the pump according to the invention essentially corresponds to a conventional Roots pump.
  • the generatrices 17 run helically, which cannot be seen in detail in the drawing.
  • This configuration ensures that in each phase of the rotary movement of the two rotors 6 and 7, a uniformly increasing suction volume is built up in front of the inlet opening 4 and a uniformly decreasing suction volume in front of the outlet opening 5, whereby a completely even flow with a large throughput is achieved in relation to the volume and the drive power of the pump.

Abstract

Afin d'assurer un débit régulier et un pompage à haut rendement avec une pompe volumétrique du type Roots, les lignes génératrices (17) de la surface de chaque curseur (6 resp. 7) partent du point d'intersection (18) des grands axes transversaux (15 resp. 16) et s'étendent obliquement en sens opposés par rapport à l'axe longitudinal médian (8 resp. 9) correspondant.

Claims (2)

1. Pompe avec un carter constitué de deux tronçons de cylindres qui se coupent, au moins un orifice d'entrée et un orifice de sortie, opposés entre-eux, étant prévus dans la zone d'intersection, et dans chaque tronçon de cylindre est logé un rotor qui tourne autour de l'axe longitudinal central de chaque cylindre, les grands axes transversaux des rotors étant sensiblement perpendiculaires entre-eux au moins au cours d'une phase du mouvement et les rotors roulant de manière jointive l'un sur l'autre et contre la paroi intérieure du carter, les génératrices partant du point d'intersection du grand axe transversal de chacun des rotors, s'étendant de manière inclinée par rapport à l'axe longitudinal central respectif, dans des directions opposées, et au cours de chacune des phases du mouvement de rotation des deux rotors, il se forme un volume d'aspiration s'agrandissant de manière régulière, devant l'orifice d'entrée, et un volume d'aspiration se réduisant de manière régulière, devant l'orifice de sortie, caractérisée en ce que chaque rotor (6, 7) comprend deux tronçons sensiblement en forme de lobe (13) qui sont reliés entre-eux par une striction (14), au niveau de leur extrémité la moins large, les rotors (6, 7) présentant une configuration telle et étant agencés l'un par rapport à l'autre de manière telle que les grands axes transversaux (15,16) des deux rotors (6, 7) soient perpendiculaires entre-eux, que le tronçon en forme de lobe (13) de l'un des rotors s'engage dans la striction (14) de l'autre rotor, et que les deux rotors roulent l'un sur l'autre de manière jointive.
2. Pompe selon la revendication 1, caractérisée en ce que l'orifice d'entrée (4) et l'orifice de sortie (5) sont disposés de manière diamétralement opposée et présentent chacun une section en forme de trapèze.
EP88905368A 1987-06-05 1988-06-04 Pompe Expired - Lifetime EP0363420B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88905368T ATE61083T1 (de) 1987-06-05 1988-06-04 Pumpe.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3718866 1987-06-05
DE19873718866 DE3718866A1 (de) 1987-06-05 1987-06-05 Pumpe
PCT/EP1988/000498 WO1988009877A1 (fr) 1987-06-05 1988-06-04 Pompe

Publications (3)

Publication Number Publication Date
EP0363420A1 EP0363420A1 (fr) 1990-04-18
EP0363420B1 true EP0363420B1 (fr) 1991-02-27
EP0363420B2 EP0363420B2 (fr) 1996-02-07

Family

ID=6329129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88905368A Expired - Lifetime EP0363420B2 (fr) 1987-06-05 1988-06-04 Pompe

Country Status (3)

Country Link
EP (1) EP0363420B2 (fr)
DE (2) DE3718866A1 (fr)
WO (1) WO1988009877A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121684C2 (de) * 1991-06-29 1999-04-01 Herold & Co Gmbh Pumpe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006041633A1 (de) * 2006-09-05 2008-03-13 Herold & Co. Gmbh Pumpe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1142734A (en) * 1913-04-30 1915-06-08 Charles W Sidwell Pump.
FR718487A (fr) * 1930-06-11 1932-01-25 Commercial Patents Inc Pompe ou moteur hydraulique à pistons rotatifs multiples agissant simultanément
GB382953A (en) 1930-06-11 1932-11-10 Commercial Patents Inc Fluid apparatus provided with co-operating rotary pistons
US2982221A (en) * 1958-07-02 1961-05-02 Joseph E Whitfield Gear pump
DE3502839A1 (de) 1985-01-29 1986-07-31 Bsa Maschinenfabrik Paul G. Langer Gmbh, 8581 Marktschorgast Pumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121684C2 (de) * 1991-06-29 1999-04-01 Herold & Co Gmbh Pumpe

Also Published As

Publication number Publication date
EP0363420B2 (fr) 1996-02-07
EP0363420A1 (fr) 1990-04-18
WO1988009877A1 (fr) 1988-12-15
DE3861857D1 (de) 1991-04-04
DE3718866A1 (de) 1988-12-22

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