EP0599333A1 - Pompe rotative - Google Patents

Pompe rotative Download PDF

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Publication number
EP0599333A1
EP0599333A1 EP93119062A EP93119062A EP0599333A1 EP 0599333 A1 EP0599333 A1 EP 0599333A1 EP 93119062 A EP93119062 A EP 93119062A EP 93119062 A EP93119062 A EP 93119062A EP 0599333 A1 EP0599333 A1 EP 0599333A1
Authority
EP
European Patent Office
Prior art keywords
spring
sealing strip
groove
rotor
pump according
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
EP93119062A
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German (de)
English (en)
Other versions
EP0599333B1 (fr
Inventor
Alois Börger
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0599333A1 publication Critical patent/EP0599333A1/fr
Application granted granted Critical
Publication of EP0599333B1 publication Critical patent/EP0599333B1/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
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels

Definitions

  • the invention relates to a rotor pump, in particular for the conveyance of liquids containing solids, according to the preamble of claim 1.
  • a rotor pump of the type mentioned is known from DE-AS 18 07 392.
  • the sealing strips are formed from plastic strips inserted into the displacer wings, the plastic strips preferably being inserted with a foot part into a corresponding guide on the displacement wing from the end face thereof.
  • flat disks or strips are attached to the two end faces of the rotor, which also cover the front ends of the sealing strips.
  • the front disks or strips are preferably made of the same material as the sealing strips, so they are elastic and relatively flexible.
  • a disadvantage of this known rotor pump is that the locking of the sealing strips on the displacement blades does not take place reliably because the front disks or strips used for this can only absorb small forces and cannot guarantee a secure, displacement-free fit of the sealing strips during pump operation.
  • Another rotor pump is known from DE 37 07 722 A1.
  • An embodiment of this rotor pump provides a tongue and groove connection between the displacer wing and sealing strip.
  • At the outer end of the wing there is a projecting, undercut dovetail spring on which the sealing strip is placed.
  • the sealing strip is connected flat to a metal plate on its side facing the wing.
  • a dovetail groove that exactly matches the tongue is cut into the metal plate and into the lower part of the sealing strip.
  • the sealing strip with the metal plate on the wing is locked here solely by frictional forces, which is sufficient for a secure fit if the frictional forces are selected to be sufficiently high by appropriate dimensions. However, these high frictional forces make it very difficult to remove a worn sealing strip for the purpose of exchanging it for a new sealing strip.
  • the locking force exerted by the locking means can be changed as required. So for the purpose of insertion and removal of a sealing strip, the clamping wedge can be loosened, as a result of which the sealing strip can be pushed on and pulled off without great effort.
  • the clamping wedge In order to securely fix the sealing strip on the displacer wing, the clamping wedge is brought into its clamping position, whereby any unintentional and harmful displacement of the sealing strip on the displacement wing is excluded. Since the actuating element for the displacement of the clamping wedge is also accessible from the face of the sealing strip, easy access is provided. An opening in the front of the pump housing is therefore sufficient to remove and install one or more sealing strips. This advantageously reduces the time and effort required for the maintenance and repair of the rotor pump.
  • a preferred embodiment provides that the rotor blades are each formed with an undercut groove and the sealing strips are each formed with a spring which is shaped to match the groove, and that the clamping wedge is in each case formed as part of the spring.
  • the rotor blades which remain in the pump for a longer operating time, therefore have no moving parts; the moving parts are provided on the sealing strips, which anyway have to be replaced from time to time due to the inevitable wear. This precludes the fact that, for example, the clamping wedge can no longer be displaced due to corrosion caused by aggressively pumped liquids.
  • the clamping wedge is designed as a loose body aligned with the rest of the fixed part of the spring, which rests against the adjacent fixed part of the spring via a pair of inclined surfaces.
  • the locking means do not require any special installation space, but are integrated into the spring of the sealing strip to save space.
  • the sloping surfaces are preferred aligned so that there is a clamping force acting in the radial direction of the rotor.
  • a further development of the invention provides that the fixed part of the spring occupies its central region as seen in the longitudinal direction of the spring and that a clamping wedge is arranged in alignment on both sides of this fixed part of the spring. This ensures that there is mutual jamming of the tongue and groove both in the front and in the rear area of the groove, which is particularly advantageous in the case of relatively long sealing strips, since the shear forces occurring during pump operation are thereby better distributed. This reduces the risk of shear fractures within the sealing strips, even with high mechanical loads.
  • the invention further proposes that the actuating element for the clamping wedge / the clamping wedges is formed by a screw bolt guided in the axial direction through the sealing strip, which can be screwed into a threaded bore provided in the clamping wedge / in one of the clamping wedges.
  • the head of the screw bolt, on which a suitable actuating tool is to be attached, then lies on the end face of the sealing strip, which enables simple actuation.
  • the head of the screw bolt is expediently countersunk in the sealing strip, i.e. arranged in the fixed part of the spring or when using two clamping wedges per spring in one of the clamping bodies in order to protect it from attack by aggressive liquids and any solid particles carried therein.
  • the groove is a T-groove or dovetail groove.
  • these groove shapes are relatively easy to manufacture and, on the other hand, they can withstand high mechanical loads.
  • the spring at its end located at the front end of the rotor / ends is made shorter than the groove and that in the free part the groove, an elastic plug contoured according to the groove cross section can be used.
  • the pump housing has a removable flat cover on its end face facing away from the drive, the free end face of the two rotors lying in front of the inside thereof in the installed state of the cover. This also enables a simpler shape of the pump housing, which simplifies and makes it cheaper to manufacture. Nevertheless, this opening on the front is completely sufficient to replace the sealing strips.
  • the invention proposes that the sealing strip has a metallic core and that the plastic or rubber covering is molded or vulcanized onto the core. In this way, a particularly intimate connection of the plastic or rubber covering with the metallic core is achieved. In addition, the volume of the plastic or rubber covering is limited, so that damage that could occur in the case of larger volumes as a result of creeping or shearing off of the plastic or rubber is avoided here.
  • the spring of the sealing strip can be made in one piece with the metallic core, which enables simple manufacture and high stability.
  • the spring of the sealing strip can also be a separate component and connected to the metallic core, preferably by means of a screw connection. This offers the possibility that the spring with the clamping wedge can still be used if the plastic or rubber covering of the sealing strip is worn. It is then sufficient to replace the metallic core with the plastic or rubber covering.
  • the exemplary embodiment of the rotor pump 1 shown consists of a housing 10 with an inlet connection 11 and an outlet connection 12 and two rotors 2, 2 ′ arranged inside the housing 10, which is oval in cross section.
  • the two rotors 2, 2 ′ are each three-bladed, that is to say they each have three displacement vanes 21.
  • the rotors 2, 2 ' are mounted parallel to one another on two shafts 20, 20' and in opposite directions to one another can be driven in rotation, as indicated by the arrows at the ends of the shafts 20, 20 '.
  • a cover flange 14 is provided, on which a flat housing cover, not shown here, can be sealingly placed and fixed.
  • a drive 13 is provided, for example an electric motor with a gear, which are not shown in detail here.
  • the two rotors 2, 2 'each have three displacement vanes 21, each of which has a sealing strip 3 at its radially outer end. Tongue and groove connections are provided for connecting the sealing strips 3 to the wings 21.
  • a groove 22 with a T-shaped cross section is visible on the upper wing 21 of the upper rotor 2. This groove 22 runs in the longitudinal direction of the rotor 2 through the wing 21.
  • the sealing strip 3 shown pulled out has on its underside a spring 32 which is shaped to match the groove 22 and which allows the sealing strip 3 to be inserted in the axial direction. Conversely, the sealing strip 3 can be pulled out in the axial direction.
  • the sealing strip 3 is provided in the areas in which it comes into contact with the inside of the wall of the pump housing 10 and the respective other rotor 2, 2 'with a plastic or rubber covering 31.
  • This plastic or rubber covering 31 is connected in a suitable manner to the rest of the metallic part of the sealing strip 3.
  • the spring 32 of the sealing strip 3 is also made of metal, preferably steel.
  • the spring 32 has a spring section designed as a clamping wedge 33. This clamping wedge 33 is displaceable by means of a screw bolt 35 guided in the axial direction by the spring 32.
  • the clamping wedge 33 can be between a release position which enables a displacement of the sealing strip 3 and a clamping position which fixes the sealing strip 3 on the wing 21 of the rotor 2.
  • the spring 32 of the sealing strip 3 is designed to be somewhat shorter than the groove 22 in the wing 21.
  • the remaining one of the Spring 32 not occupied space of the groove 22 serves to receive an elastic plug 36, which is adapted to the cross-sectional shape of the groove 22 and which can be pressed into this for sealing.
  • the plug 36 can simply be pulled outwards.
  • FIG. 2 of the drawing shows the rotor 2 from the rotor pump 1 according to FIG. 1 in the disassembled state, a sealing strip 3 also being shown here in the removed state.
  • the length of the individual sealing strips 3 is such that two sealing strips 3 fit one behind the other on a wing 21 of the rotor 2.
  • the sealing strips 3 arranged one behind the other are completely identical to one another, so that each sealing strip 3 can be used at any position.
  • these sealing strips 3, in the manner of a modular system can be used to equip smaller or larger rotors 2 in a corresponding gradation with one, two or three more sealing strips 3 per wing 21.
  • the arrangement of the clamping wedge 33 on the underside of the sealing strip 3 is shown particularly clearly here.
  • the clamping wedge 33 bears against the right part of the spring 32 of the sealing strip 3 in FIG.
  • the clamping wedge 33 is moved up or down by sliding along the inclined surfaces 34, 34 ', whereby the desired clamping force can be generated or canceled when the sealing strip 3 is arranged in the groove 22 in the blade 21 of the rotor 2 .
  • sealing strips 3 are arranged one behind the other on a wing 21, if an exchange of the rear, ie. H. In FIG. 2 left sealing strip 3 is required, the front sealing strip 3 is first removed, as a result of which the screw bolt 35 in the end face of the rear sealing strip is then accessible.
  • the sealing strips 3 are installed in the reverse order.
  • Figure 3 of the drawing shows part of a sealing strip 3 in a modified version compared to Figures 1 and 2, wherein the sealing strip part shown here consists of a metallic core 30 and a molded or vulcanized plastic or rubber covering 31 thereon.
  • the contour of the metallic core 30 results in a particularly strong and permanent connection between the core 30 and the plastic or rubber covering 31.
  • Figure 4 of the drawing shows a complete sealing strip 3 in longitudinal section, the plastic or rubber covering 31, the metallic core 30 and the spring 32 of the sealing strip 3 being visible from top to bottom.
  • FIG. 4 further shows that the plastic or rubber covering also extends in one piece over the end faces of the metallic core 30, as a result of which an adequate end face also Seal between the housing and sealing strip 3 is reached.
  • the spring 32 here has a T-shape in cross section, the T-crossbar pointing downward.
  • the narrower part of the T-shaped spring 32 lies in a recess in the underside of the metallic core 30 and is detachably screwed to it by means of two threaded bolts 30 ′′.
  • the part of the spring 32 on the left in FIG. 4 is designed as a clamping wedge 33 which, in the unlocked position shown here, is aligned with the rest of the spring 32.
  • the fixed part of the spring 32 has an inclined surface 34 at its left end, the clamping wedge 33 has an opposite inclined surface 34 'at its right end.
  • a threaded bore 33 ′ runs through the clamping wedge 33, into which a threaded bolt 35 can be screwed.
  • the threaded bolt 35 lies with its head on the right side, i. H. the end face of the spring 32 and runs through an axially extending bore 35 'through the spring 32.
  • the bore 35' is made so large that sufficient play of the threaded bolt 35 remains up and down to a displacement of the clamping wedge 33 relative to allow for the rest of the spring 32 along the pair of inclined surfaces 34, 34 '.
  • Two further bores 32 ' run perpendicular to the bore 35' through the spring 32 and serve to pass through the threaded bolt 30 '' for connecting the spring 32 to the metallic core 30 of the sealing strip 3.
  • the threaded bolt 35 must be removed beforehand.
  • Figure 5 of the drawing shows a sealing strip 3 in a modified version, which is characterized in particular by the fact that it has two clamping wedges 33. These two clamping wedges 33 are on the front and rear (in the drawing left and right) end of the spring 32 and aligned with this.
  • the right, ie front clamping wedge 33 in FIG. 5 has a stepped bore for receiving the upper part and the head of the screw bolt 35 and the middle part of the spring 32 is fixed and also has a through hole for the shaft of the threaded bolt 35.
  • a threaded bore 33 ' is provided, into which the end of the threaded bolt 35 provided with a counter thread can be screwed.
  • the two clamping wedges 33 can be released from the fixed part of the spring 32, after which the threaded bolts 30 ′′ are then accessible for connecting the spring 32 to the core 30 of the sealing strip 3 lying above it.
  • a small part of the rubber covering 31 can still be seen in FIG. 5 on the left and right outer edge.
  • FIG. 6 of the drawing finally illustrates the T-shape of the spring 32 in cross section, the threaded bolt 35 running through the lower part of the spring 32. Above the spring 32, the metallic core 30 of the sealing strip 3, which is screwed to this, is also indicated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP93119062A 1992-11-27 1993-11-25 Pompe rotative Expired - Lifetime EP0599333B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9216170U 1992-11-27
DE9216170U DE9216170U1 (de) 1992-11-27 1992-11-27 Rotorpumpe, insbesondere für die Förderung von Feststoffe enthaltenden Flüssigkeiten

Publications (2)

Publication Number Publication Date
EP0599333A1 true EP0599333A1 (fr) 1994-06-01
EP0599333B1 EP0599333B1 (fr) 1996-06-12

Family

ID=6886502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119062A Expired - Lifetime EP0599333B1 (fr) 1992-11-27 1993-11-25 Pompe rotative

Country Status (3)

Country Link
EP (1) EP0599333B1 (fr)
JP (1) JP3363189B2 (fr)
DE (2) DE9216170U1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1855006A2 (fr) * 2006-05-11 2007-11-14 Hugo Vogelsang Maschinenbau GmbH Pompe à piston rotatif
WO2013019948A1 (fr) * 2011-08-03 2013-02-07 Ramos Rolando Nico M Piston à surfaces remplaçables et/ou ajustables
CN104791243A (zh) * 2015-04-07 2015-07-22 上海大学 组合式特殊齿形凸轮转子泵
CN107218214A (zh) * 2017-07-03 2017-09-29 重庆洪量泵业有限公司 一种变形刮片容积泵
CN110735795A (zh) * 2019-11-19 2020-01-31 西安理工大学 一种罗茨鼓风机转子端面环形密封结构

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313457C1 (de) * 1993-04-24 1994-05-11 Alois Boerger Drehkolbenpumpe,insbesondere für die Förderung von Feststoffe enthaltenden Flüssigkeiten
GB2304380B (en) * 1995-08-17 1998-06-10 Tochigi Fuji Sangyo Kk Fluid machine
DE19802264C1 (de) * 1998-01-22 1998-11-26 Boerger Gmbh Rotorpumpe
DE10022097C1 (de) * 2000-05-08 2001-09-27 Boerger Gmbh Kreiskolbenpumpe
DE50014574D1 (de) 2000-05-18 2007-09-27 Hugo Vogelsang Maschb Gmbh Drehkolbenpumpe
JP2008286183A (ja) * 2007-05-20 2008-11-27 Yoshio Abe ロータのシール。
DE102008045440B4 (de) 2008-09-02 2017-02-09 Börger GmbH Drehkolben einer Drehkolbenpumpe und Drehkolbenpumpe
KR101439349B1 (ko) * 2013-01-25 2014-09-11 제이엠모터스 주식회사 벨트교환식 마모방지로터를 가진 회전식 용적형펌프
DE102020111306A1 (de) 2020-04-24 2021-10-28 Dt Swiss Ag Fahrradkomponente mit einer verstellbaren Sattelstützeinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE105715C (fr) *
DE1807392A1 (de) * 1968-11-07 1970-06-11 Goeppner Kaiserslautern Eisen Drehkolbenpumpe fuer zaehfluessige Medien
DE3707722A1 (de) * 1987-03-11 1988-09-29 Alois Boerger Rotorpumpe, insbesondere fuer die foerderung von feststoffe enthaltenden fluessigkeiten

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE105715C (fr) *
DE1807392A1 (de) * 1968-11-07 1970-06-11 Goeppner Kaiserslautern Eisen Drehkolbenpumpe fuer zaehfluessige Medien
DE3707722A1 (de) * 1987-03-11 1988-09-29 Alois Boerger Rotorpumpe, insbesondere fuer die foerderung von feststoffe enthaltenden fluessigkeiten

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1855006A2 (fr) * 2006-05-11 2007-11-14 Hugo Vogelsang Maschinenbau GmbH Pompe à piston rotatif
EP1855006A3 (fr) * 2006-05-11 2012-10-24 Hugo Vogelsang Maschinenbau GmbH Pompe à piston rotatif
WO2013019948A1 (fr) * 2011-08-03 2013-02-07 Ramos Rolando Nico M Piston à surfaces remplaçables et/ou ajustables
US9383013B2 (en) 2011-08-03 2016-07-05 Lobepro, Inc. Piston with replaceable and/or adjustable surfaces
CN104791243A (zh) * 2015-04-07 2015-07-22 上海大学 组合式特殊齿形凸轮转子泵
CN107218214A (zh) * 2017-07-03 2017-09-29 重庆洪量泵业有限公司 一种变形刮片容积泵
CN110735795A (zh) * 2019-11-19 2020-01-31 西安理工大学 一种罗茨鼓风机转子端面环形密封结构
CN110735795B (zh) * 2019-11-19 2021-04-06 西安理工大学 一种罗茨鼓风机转子端面环形密封结构

Also Published As

Publication number Publication date
DE9216170U1 (de) 1993-01-14
DE59302906D1 (de) 1996-07-18
JPH06257574A (ja) 1994-09-13
EP0599333B1 (fr) 1996-06-12
JP3363189B2 (ja) 2003-01-08

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