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EP0225937A1 - Pompe à piston rotative pour le refoulement de purin ou produits similaires - Google Patents

Pompe à piston rotative pour le refoulement de purin ou produits similaires Download PDF

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Publication number
EP0225937A1
EP0225937A1 EP85116283A EP85116283A EP0225937A1 EP 0225937 A1 EP0225937 A1 EP 0225937A1 EP 85116283 A EP85116283 A EP 85116283A EP 85116283 A EP85116283 A EP 85116283A EP 0225937 A1 EP0225937 A1 EP 0225937A1
Authority
EP
European Patent Office
Prior art keywords
rotary
rotary lobe
lobe pump
housing
piston
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.)
Granted
Application number
EP85116283A
Other languages
German (de)
English (en)
Other versions
EP0225937B1 (fr
Inventor
Gerhard Eckart
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.)
Individual
Original Assignee
Individual
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
Priority to DE19843427282 priority Critical patent/DE3427282A1/de
Application filed by Individual filed Critical Individual
Priority to AT85116283T priority patent/ATE56076T1/de
Priority to DE8585116283T priority patent/DE3579463D1/de
Priority to EP85116283A priority patent/EP0225937B1/fr
Publication of EP0225937A1 publication Critical patent/EP0225937A1/fr
Application granted granted Critical
Publication of EP0225937B1 publication Critical patent/EP0225937B1/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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/001—Pumps for particular liquids
    • F04C13/002—Pumps for particular liquids for homogeneous viscous liquids
    • 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
    • F04C2/126—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 radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type

Definitions

  • the invention relates to a rotary lobe pump for conveying material interspersed with foreign bodies, such as liquid manure or the like, in which two rotary pistons which roll on one another and rotate in opposite directions are fastened in a housing on two mutually parallel shafts.
  • each rotary lobe has an elastically flexible outer jacket made of rubber.
  • the invention has for its object to develop the known slurry pump so that even after a long period of operation and wear on the outer surface of the rotary lobes, the resulting play between the piston and the housing can be compensated or the piston can be replaced quickly and easily.
  • the invention provides that the inner wall of the housing is radially movable with respect to the axis of the associated rotary piston.
  • This measure also makes it possible to make up for relatively heavy wear on the outer jacket of the rotary lobe, so that the pump performance is not impaired.
  • the radially movable inner wall consists of partially cylindrical shells.
  • Each of these shells can be radially adjustable by means of adjusting screws, but it is also possible to bring about radial adjustment by means of elastic elements or by means of a pressure medium.
  • means are provided for guiding it.
  • the rotary pistons of which consist of a carrier body and an elastic jacket surrounding its circumference, provision is made for adjusting pistons which can be acted upon by pressure medium to be arranged between the carrier body and the jacket.
  • the adjusting pistons are preferably connected via feed channels to a supply bore machined into the associated shaft.
  • each rotary lobe can be attached to the shaft in a torsionally elastic manner.
  • the rotary pistons can be quickly removed and replaced if necessary, they are divided according to a further feature of the invention in at least one axial plane, the piston parts formed thereby being releasably connected to one another.
  • the rotary piston has sliding, axially extending sealing strips on the inner wall of the housing.
  • At least one coaxial annular groove is machined into the end faces of each rotary piston, into which an annular sealing projection attached to the housing engages like a labyrinth.
  • This measure helps to ensure that no pumped medium can escape from the pump, even at very high pressures.
  • a wear plate can also be fastened between the end faces of the rotary pistons and the opposite inner wall of the housing to avoid leakage losses. It has been found that the frequently occurring high pressures in the pump act so strongly on the cover closing the housing that they are deformed or damaged. This disadvantage can be prevented by the wear plate.
  • the rotary lobe pump has a housing 10 which is approximately oval in cross section and in which two mutually parallel shafts 12 are rotatably mounted.
  • An approximately lemniscate-shaped rotary piston 14 is attached to each shaft 12.
  • the two rotary pistons 14 roll on each other like a Roots blower and rotate in opposite directions.
  • each rotary piston 14 consists of a fixed support body 16 and a circumferential, elastic jacket 18, which consists for example of rubber.
  • the inner wall of the housing 10, on which the rotary pistons 14 roll consists of two semi-cylindrical shells 20 made of a wear-resistant material.
  • each shell 20 is radially movable with respect to the axis of the associated rotary piston 14 (arrow A in FIG. 1). So that each shell 20 is guided in its radial displacement in such a way that it cannot deflect either in the circumferential direction or in the axial direction, it engages with a radial, pin-shaped projection 22 in a corresponding radial bore 24 which is machined into the housing 10.
  • FIG. 1 In order to enable the radial adjustment movement of the shells 20, there are several possibilities, two of which are indicated in FIG. 1. As the upper half of FIG. 1 shows, a threaded hole can be machined into the peg-shaped extension 22, into which a set screw 26 engages, the head of which is supported on the housing 10. Instead of the attachment 22 for guiding the radial movement, other measures can be provided, for example pins, guiding attachments at the ends of the shells 20 or the like.
  • the radial bore 24 of the housing 10 is closed by a screw 28. Between this and the free end of the neck 22, a compression spring 30 is used, which serves to automatically catch up when the piston skirt 18 wears.
  • Another possibility, not shown, for wear compensation consists in passing a pressure medium, for example oil, into the radial bore 24.
  • FIG. 1 also shows that the radial displaceability of the two shells 20 after covering a distance s is limited by a stop 36 both in the area of the suction port 32 and the pressure port 34.
  • FIG. 2 shows a front end of the pump, which is opposite the drive end. It can be seen here that a cover 38 is flanged to the housing 10 and accommodates the bearings 40 for the two shafts 12. Between the cover 38 and the housing 10, a wear plate 42 is clamped, which consists for example of hardened steel. In this way, high pressures in the pump chamber 44 are absorbed by the wear plate 42, so that the inner wall of the housing 10 formed by the cover 38 is relieved and is protected from deformation.
  • seal packings 46 are provided to seal the pump chamber 44 from the outside.
  • annular sealing projection 48 coaxial with the shaft 12 is formed, which engages in an associated annular groove 50 which is worked into the jacket 18 of the rotary piston 14. This labyrinth seal prevents possible leakage losses.
  • the rotary piston 14 is divided in the axial plane 52, so that two piston parts 14 'and 14' 'are formed, which are releasably connected by bolts 54.
  • the latter In the area of the parting joint of the rotary piston 14, the latter carries two sealing strips 56, which bear against the semi-cylindrical shell 20 forming the inner wall of the housing 10.
  • the rotary piston 14 is rotatably mounted on the shaft 12.
  • the shaft 12 is rectangular in cross-section and passes through a likewise rectangular receiving bore 58 of the rotary piston 14.
  • elastic blocks 60 are used between the shaft 12 and the rectangular receiving bore 58 of the rotary piston 14, so that the latter yields elastically in the circumferential direction when For example, large or hard foreign bodies are conveyed through the pump chamber 44.
  • damping members for example spring bands or torsion springs, can of course also be used.
  • Figures 4 and 5 show that other piston shapes can be divided in axial planes and are elastically connected to the associated shaft 12.
  • FIG. 6 A further example of how play between the rotary piston 14 and the inner wall of the housing - here the semi-cylindrical shell 20 - can be compensated for is shown in FIG. 6.
  • adjusting pistons 62 are fastened to the inner wall of the elastic jacket surrounding the support body 16, for example by vulcanization which can be acted upon by a pressure medium, for example oil, air, grease or the like.
  • the pressure medium is guided to the adjusting pistons 62 via radial feed channels 64.
  • a sensor (not shown) can be provided, which controls a pump for the pressure medium as soon as a predetermined, permissible clearance between the piston and the inner wall of the housing is exceeded.
  • FIG. 7 shows an application example of the invention in which two rotary lobe pumps I and II are connected axially in series.
  • the pressure port 34 of the pump I is connected to the suction port 32 of the pump II.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP85116283A 1984-07-24 1985-12-19 Pompe à piston rotative pour le refoulement de purin ou produits similaires Expired - Lifetime EP0225937B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19843427282 DE3427282A1 (de) 1984-07-24 1984-07-24 Drehkolbenpumpe zur foerderung von guelle o.dgl.
AT85116283T ATE56076T1 (de) 1985-12-19 1985-12-19 Drehkolbenpumpe zur foerderung von guelle oder dgl.
DE8585116283T DE3579463D1 (de) 1985-12-19 1985-12-19 Drehkolbenpumpe zur foerderung von guelle oder dgl.
EP85116283A EP0225937B1 (fr) 1985-12-19 1985-12-19 Pompe à piston rotative pour le refoulement de purin ou produits similaires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85116283A EP0225937B1 (fr) 1985-12-19 1985-12-19 Pompe à piston rotative pour le refoulement de purin ou produits similaires

Publications (2)

Publication Number Publication Date
EP0225937A1 true EP0225937A1 (fr) 1987-06-24
EP0225937B1 EP0225937B1 (fr) 1990-08-29

Family

ID=8193952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85116283A Expired - Lifetime EP0225937B1 (fr) 1984-07-24 1985-12-19 Pompe à piston rotative pour le refoulement de purin ou produits similaires

Country Status (3)

Country Link
EP (1) EP0225937B1 (fr)
AT (1) ATE56076T1 (fr)
DE (1) DE3579463D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0389838A2 (fr) * 1989-03-30 1990-10-03 Inoxpa, S.A. Carter pour pompe rotative
US5312231A (en) * 1992-07-24 1994-05-17 Engineering Corporation Slurry conveyor device
US6095781A (en) * 1997-09-11 2000-08-01 Viking Pump, Inc. Timed element, high pressure, industrial rotary lobe pump
GB2429751A (en) * 2005-08-31 2007-03-07 Alfa Laval Corp Ab Axially removable flanged wearplate for lobe pump
DE102010014248A1 (de) * 2010-04-08 2011-10-13 Netzsch-Mohnopumpen Gmbh Kontaktelemente für Drehkolbenpumpen
DE202010015439U1 (de) * 2010-11-16 2012-02-17 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe und Gehäuse-Halbschale für selbige
DE102012003287A1 (de) * 2012-02-20 2013-08-22 Netzsch Pumpen & Systeme Gmbh Drehkolben

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB108394A (en) * 1916-09-28 1917-08-09 George Henry Boot Improvements relating to Rotary Pumps.
DE547725C (de) * 1930-12-10 1932-04-04 Hinrich Schottler Abdichtung der Kolbentrommel gegen die Gehaeusewandung von Drehkolbenmaschinen mit sichelfoermigem Arbeitsraum
GB781240A (en) * 1955-12-22 1957-08-14 Georges Ilune Improvements in or relating to volumetric rotary pumps and/or compressors
USRE25567E (en) * 1964-05-05 Lorenz
US4137024A (en) * 1977-07-18 1979-01-30 Curtiss-Wright Corporation Rotor for rotary piston mechanism
DE3427282A1 (de) * 1984-07-24 1986-01-30 Gerhard 8300 Landshut Eckart Drehkolbenpumpe zur foerderung von guelle o.dgl.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE25567E (en) * 1964-05-05 Lorenz
GB108394A (en) * 1916-09-28 1917-08-09 George Henry Boot Improvements relating to Rotary Pumps.
DE547725C (de) * 1930-12-10 1932-04-04 Hinrich Schottler Abdichtung der Kolbentrommel gegen die Gehaeusewandung von Drehkolbenmaschinen mit sichelfoermigem Arbeitsraum
GB781240A (en) * 1955-12-22 1957-08-14 Georges Ilune Improvements in or relating to volumetric rotary pumps and/or compressors
US4137024A (en) * 1977-07-18 1979-01-30 Curtiss-Wright Corporation Rotor for rotary piston mechanism
DE3427282A1 (de) * 1984-07-24 1986-01-30 Gerhard 8300 Landshut Eckart Drehkolbenpumpe zur foerderung von guelle o.dgl.

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0389838A3 (fr) * 1989-03-30 1991-01-09 Inoxpa, S.A. Carter pour pompe rotative
EP0389838A2 (fr) * 1989-03-30 1990-10-03 Inoxpa, S.A. Carter pour pompe rotative
US5312231A (en) * 1992-07-24 1994-05-17 Engineering Corporation Slurry conveyor device
US6095781A (en) * 1997-09-11 2000-08-01 Viking Pump, Inc. Timed element, high pressure, industrial rotary lobe pump
GB2429751A (en) * 2005-08-31 2007-03-07 Alfa Laval Corp Ab Axially removable flanged wearplate for lobe pump
DE102010014248B4 (de) * 2010-04-08 2016-04-28 Netzsch Pumpen & Systeme Gmbh Kontaktelemente für Drehkolbenpumpen
DE102010014248A1 (de) * 2010-04-08 2011-10-13 Netzsch-Mohnopumpen Gmbh Kontaktelemente für Drehkolbenpumpen
WO2011124212A3 (fr) * 2010-04-08 2013-03-21 Netzsch Mohnopumpen Gmbh Éléments de contact pour pompes à pistons rotatifs
DE202010015439U1 (de) * 2010-11-16 2012-02-17 Hugo Vogelsang Maschinenbau Gmbh Drehkolbenpumpe und Gehäuse-Halbschale für selbige
CN103299078A (zh) * 2010-11-16 2013-09-11 福格申机械有限公司 旋转活塞泵及其分半壳体
CN103299078B (zh) * 2010-11-16 2016-04-20 福格申机械有限公司 旋转活塞泵及其分半壳体
WO2012066026A3 (fr) * 2010-11-16 2013-06-20 Hugo Vogelsang Maschinenbau Gmbh Pompe à piston rotatif et demi-coque de boîtier pour ladite pompe
US9702362B2 (en) 2010-11-16 2017-07-11 Hugo Vogelsang Maschinenbau Gmbh Rotary piston pump and casing half-shells for same
DE102012003287A1 (de) * 2012-02-20 2013-08-22 Netzsch Pumpen & Systeme Gmbh Drehkolben

Also Published As

Publication number Publication date
EP0225937B1 (fr) 1990-08-29
DE3579463D1 (de) 1990-10-04
ATE56076T1 (de) 1990-09-15

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