EP2278164A2 - Exzenterschneckenpumpe - Google Patents

Exzenterschneckenpumpe Download PDF

Info

Publication number
EP2278164A2
EP2278164A2 EP10169896A EP10169896A EP2278164A2 EP 2278164 A2 EP2278164 A2 EP 2278164A2 EP 10169896 A EP10169896 A EP 10169896A EP 10169896 A EP10169896 A EP 10169896A EP 2278164 A2 EP2278164 A2 EP 2278164A2
Authority
EP
European Patent Office
Prior art keywords
stator
pump
relief
anchoring
housing
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Withdrawn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
EP10169896A
Other languages
English (en)
French (fr)
Other versions
EP2278164A3 (de
Inventor
Jean Paul Wautelet
Jean-Pierre Marielle
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.)
PCM Technologies SAS
Original Assignee
PCM
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 PCM filed Critical PCM
Publication of EP2278164A2 publication Critical patent/EP2278164A2/de
Publication of EP2278164A3 publication Critical patent/EP2278164A3/de
Withdrawn legal-status Critical Current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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member

Definitions

  • the present invention is in the field of volumetric pumps of the type of eccentric screw pumps, also called progressive cavity pumps or Sparrow pumps.
  • the present invention relates to a progressive cavity pump and a pumping device comprising such a pump.
  • a pumping device comprises, in a conventional manner a progressive cavity pump, or Sparrow pump, and a housing for receiving a fluid.
  • the pump comprises a stator and a helical rotor housed in the stator.
  • the housing contains an intermediate shaft whose one end is coupled to the rotor and the other end is coupled to an output shaft of a drive motor.
  • the stator is clamped between two flanges by means of tie rods.
  • couples Under certain conditions of use of couples can be present such as when the temperature is high and the stator swells. It can then be rotated by the rotor. As a result, the ends of the stator are damaged so that the seal between the stator and the housing is no longer ensured.
  • the present invention aims to block the rotation of the stator and thus prevent its destruction.
  • the subject of the invention is a pump with progressive cavities comprising a stator having an inlet end intended to be coupled to a housing for receiving a fluid, characterized in that it comprises an anchoring element comprising at least one leg and at least one clamping body; said leg being adapted to rest on and to be fixed to a fixed plane support; said clamping body being adapted to grip the input end of the stator, and in that said input end and said clamping body comprise mutual locking means in rotation.
  • the stator 8 is made of a rigid material such as for example in a metal. It optionally comprises an elastic material, such as rubber, adhered to the inner face of a metal structure.
  • the input end 21 of the stator 8 is provided with a neck 28 forming a first shoulder 29 with the outer surface 30 of the stator.
  • An end pipe 26 of the casing 20, illustrated on the figure 4 is fitted on the collar 28.
  • the input end 21 of the stator 8 is also provided with a groove 31 forming a second 27 and a third 32 shoulders with the outer surface 30 of the stator.
  • the groove 31 comprises two stator reliefs 33 adapted to cooperate with two complementary anchoring reliefs 34 for locking the stator 8 in rotation with respect to a fixed support 38 illustrated in FIGS. figures 1 and 2 via an anchoring element 36.
  • the fixed support 38 is for example constituted by the floor on which the pumping device 1 is placed or any other flat surface carrying the pumping device 1.
  • Each stator relief 33 comprises a hollow or a boss. It forms a footprint.
  • each stator relief 33 is constituted by a flat portion 40 extending over an angular section of the stator between 5 ° and 40 °.
  • the stator relief 33 is preferably positioned at a predefined angular position on the periphery of the stator 8 so that when the anchoring element 36 is fixed to the stator 8 and on the fixed support 38, the first cell 39 s extends vertically and preferably, the longitudinal axis of the first cell is substantially vertical, as visible on the figure 2 .
  • this angular position of the stator 8 improves the suction capacity of the pump 2.
  • this angular position of the stator 8 decreases the number of air bubbles.
  • this angular position of the stator 8 improves the yields.
  • this angular position of the stator 8 also increases the cleanability of the pump 2.
  • the anchoring element 36 comprises two identical anchoring pieces 41, 43 capable of being fixed to one another.
  • the anchoring pieces 41, 43 each comprise a leg 44, 46 intended to rest on the fixed support 38, a clamping arm 48, 50 integral with the leg 44, 46, and an insert 52, 54 carried by the arm
  • the input end of the stator is fixed locally to the fixed plane support 38, by the anchoring element 36.
  • the anchoring pieces 41, 43 are fastened to each other by means of screws 56, 58 screwed into orifices 60, 62 provided in the upper and lower parts of the clamping arms 48, 50.
  • Nuts 57, 59 are screwed to the free ends of the screws 56, 58 to ensure the axial locking of the screws.
  • the clamping arms 48, 50 are constituted by two half-clamps.
  • the half-clamps 48, 50 and the inserts 52, 54 form a clamping body capable of gripping the stator 8.
  • This clamping body is positioned in the groove 31 of the stator.
  • the second 27 and the third 32 shoulders retain this clamping body in the groove 31 and prevent any axial displacement of the anchoring element 36 under the effect of vibrations and pressure forces generated by the rotation of the rotor 4 in the stator 8, visible in figure 2 .
  • clamping arms 48, 50 only grip a portion of the stator.
  • clamping arms are for example constituted by a ring equipped with independent clamping elements or by rectilinear clamping arms.
  • the insert 52 comprises a flat wedge 64 provided on its outer face 66 with a central pin 68.
  • the flat wedge 64 and the central pin 68 are adapted to fit respectively one in a rectangular housing 70, and the other in a hole 72 dug in the clamping arms 48, 50.
  • the anchoring relief 34 is formed on the inner face 74 of the shim 64.
  • the anchoring relief 34 is constituted by a flat surface proper to bear on the flat part 40 of the stator to lock the stator in rotation by the intermediate legs 44,46.
  • the insert 54 is identical to the insert 52.
  • the shim 64 has a main face of dimensions greater than or equal to the dimensions of the flat part 40 of the stator.
  • the legs 44, 46 are equipped with a seat plate 76 provided at its end with a half-hole 78.
  • the seat plates 76 of the legs 44 and 46 are in contact with each other and form a base to be held against the fixed support 38 via a fastening screw 80 screwed into the half-holes 78.
  • the legs 44, 46 are spaced from each other by a distance substantially less than the diameter of the clamp formed by the clamping arms 48, 50.
  • Each clamping arm 48, 50 further comprises a tab 82 extending vertically and projecting from the body of the clamping arm 48, 50. This tab 82 forms a notch 84 for receiving a fastener of the stator 8 at the end pipe 26 of the casing 20, visible in figure 2 .
  • the fixing member hereinafter drawing 90 is, for example, in the form of bent rod. It is suitable for providing a rigid connection between a clamping arm 48 or 50 integral with the stator 8, and the casing 20 or the pipe 22 visible in FIG. figure 2 .
  • the tie rod 90 comprises a first rod portion 89 said rectilinear rod portion, and a second rod portion 91 said bent rod portion.
  • the end of the bent rod portion 91 is provided with a constriction 92 ending in a button 94.
  • the button 94 is formed by a generally oblong dish.
  • the longer axis A-A of the button 94 also called the longitudinal axis, is parallel to the central axis B-B of the rectilinear rod portion 89.
  • the button 94 is adapted to be engaged in a buttonhole 98 formed in a collar 100 of the housing 20 or attached to the housing.
  • the buttonhole 98 comprises a first recess 102 open on the outside face of the collar 100 and a second recess 104 open on the inside face of the collar 100 and communicating with the first recess 102.
  • the first recess 102 has an oblong shape identical to the shape of the button 94.
  • the longer axis C-C of the first recess 102 also called the longitudinal axis, is perpendicular to the axis D-D of the end pipe 26.
  • At least a portion of the second recess 104 is circular, of diameter at least equal to the greater diameter of the button 94.
  • faces of the second recess 104 form bearing faces 106, 108 of the button 94. These bearing faces 106, 108 are disposed on either side of the longitudinal axis CC of the first recess 102.
  • the edge of the stator 8, coated with an elastomer, is able to bear against a shoulder 109 formed on the inner face of the end pipe of the casing 20, when the stator is assembled to the casing 20 so as to ensure sealing between them.
  • a screw thread 110 is formed on the rectilinear rod portion 89 of the tie rod 90.
  • This screw thread 110 is adapted to receive a washer 114 and a nut 116.
  • the washer 114 is in abutment against the tab 82 and against the lateral face of the clamping arm 48.
  • the clamping arm 48 abuts against the second shoulder 27.
  • the anchoring element 36 can be mounted on the inlet end 21 as well as on the outlet end 23 of the stator 8.
  • the tie rod 90 is adapted to pull the end pipe 26 of the casing 20 against the inlet end 21 of the stator.
  • the tie rod 90 is adapted to pull the end pipe 115 of the pipe 22 against the outlet end 23 of the stator.
  • the button 94 is first introduced into the first 102 and then the second 104 recesses.
  • the longitudinal axis AA of the button 94 is then parallel to the longitudinal axis CC of the first recess 102.
  • the tie 90 is rotated by an angle of 90 ° so that the longitudinal axis AA of the button 94 is perpendicular to the longitudinal axis CC of the first recess 102.
  • a shoulder 96 formed between the constriction 92 and the button 94 is then in contact with the bearing faces 106, 108.
  • the button 94 is then locked in the buttonhole 98.
  • the nut 116 is screwed onto the rectilinear rod portion 89 until the washer 114 is in abutment against the tab 82 and against the lateral face of the clamping arm 48.
  • the tie rod 90 is a straight rod. In this case, it is fixed in a buttonhole dug in a protrusion formed on the collar 100 of the housing 20.
  • the groove 118 formed at the outlet end 23 is a smooth annular groove. In other words, it does not include a stator relief 33.
  • An anchoring element 36 similar to the anchoring element illustrated on FIG. figure 3 is mounted on the groove 118. This anchoring element 36 does not include the inserts 52, 54.
  • the anchoring element 36 when attached to the groove 118 without the inserts 52, 54, provides only a support function of the stator 8 and a hooking function on the pipe 22. It does not allow the block the stator in rotation or index the position of the stator 8 at the position of a cell of the rotor 4.
  • the anchoring element 36 comprises a single tab 82 and a single tie rod 90 disposed on a clamping arm 48, on one side of the stator 8.
  • the anchoring element 36 comprises a plurality of tabs 82 and several tie rods 90 arranged on a clamping arm 48.
  • stator 8 comprises a single flat part 40 and a single clamping arm 48, 50 is provided with an insert 52.
  • the flats 40 are directly formed on the clamping arms 48, 50.
  • the anchoring element 36 does not comprise any inserts 52, 54.
  • At least one section of the stator has an octagonal shape and the clamping arm has a complementary shape.
  • the progressive cavity pump 2 according to the second embodiment of the invention will now be described in connection with the Figures 9 to 11 .
  • This pump 2 comprises a stator 120 having an inlet end 122 and an outlet end 124 each adapted to receive an anchoring element 128.
  • the inlet end 122 is provided with a neck 126 on which the end pipe 26 of the casing 20, visible in figure 1 , is fitted.
  • the neck 126 forms a shoulder with the outer surface 130 of the stator.
  • the stator relief 33 is a groove portion 132.
  • This groove portion 132 extends over an angular section of the stator 120 between 5 ° and 40 °. It presents a rectilinear bottom.
  • the anchoring element 128 is similar to the anchoring element 36 of the first embodiment of the invention.
  • the identical elements of these anchoring elements bear the same references and will not be described a second time.
  • the anchoring element 128 comprises a single insert 52 on which the anchoring relief 34 is formed.
  • the insert 52 is, in this embodiment of the invention, an assembly rod 134 adapted to be engaged in through holes 136, 138 provided at the free end of the clamping arms 48, 50.
  • assembly 134 is provided at one of its ends with a head 140 and at the other end with a nut 142 screwed into a thread to block the axial displacement of the connecting rod 134 in the through holes 136, 138.
  • the anchoring element 128 can also be equipped with tie rods 90 not shown on the figure 9 .
  • the outlet end 124 of the stator 120 also comprises a neck 126 on which the end pipe 115 of the pipe 22 visible in figure 1
  • An annular groove 140 is machined around the periphery of the stator 120 in place of the anchoring relief 34.
  • the anchoring element 128 is adapted to be fixed in the annular groove 140 so that the rod assembly 134 passes through this groove 140.
  • the clamping arms 48, 50 are positioned in the throat 140 of the stator.
  • the shoulders formed by the groove portion 132 retain these clamping arms in the groove 140 and prevent any axial displacement of the anchoring element 128 under the effect of vibrations and pressure forces generated by the rotation of the rotor 4 in the stator 8 visible in figure 2 .
  • a pump 2 with progressive cavities according to the third embodiment of the invention is illustrated on the Figures 12 and 13 .
  • the stator 8 of this pump 2 is identical to the stator of the pump according to the first embodiment of the invention illustrated in FIG. figure 8 .
  • the anchoring element 142 according to this third embodiment of the invention is similar to the anchoring element 36 according to the first embodiment of the invention.
  • the identical elements of these anchoring elements bear the same references and will not be described a second time.
  • Each tab 82 is pierced with a through hole 88 with an axis perpendicular to the axis of the clamping arms 48, 50, disposed opposite the hole 72.
  • the hole 72 is through and tapped.
  • the patches 52, 54, visible in figure 3 are not constituted by wedges but by pressure screws 144, preferably flat end, introduced into the through holes 88 of the tabs 82 and screwed into tapped holes 72.
  • the pressure screws 144 are fit to abut against the flats 40 of the stator to lock the stator in rotation.
  • each pressure screw 144 cooperates with the flat surface 40 of the visible stator. figure 3 . This flat end forms the anchoring relief 34.
  • each pressure screw has a clean pointed tip to cooperate with a hole of the stator.
  • the anchoring element comprises a single tab 82 and a single set screw 144 fixed on one side of the stator. In a variant, the anchoring element comprises a plurality of lugs 82 and a plurality of set screws 144.
  • the stator 8 comprises a flat 40, a shim 64 without central pin 68 mounted in the housing 70 and a set screw 144 screwed into the threaded hole 72.
  • the set screw 144 then constitutes a clamping element of the hold .
  • the flat face of the wedge then forms the anchoring relief 34.
  • the anchoring elements according to the three embodiments comprise "conventional" fasteners, for example tie rods attached to the motor housing or geared motor.
  • tie rod 90 and the tab 82 can be mounted on an anchoring element 128, 142 according to the second and third embodiments.
  • the fasteners between the stator and the pipe, and between the stator and the casing are easily dismountable by partially unscrewing the nuts 116 and tilting the tie rods 90 by an angle of 90 °.
  • the pump according to the invention comprises means for orienting the first cell of the stator located on the housing side and means for locking the stator in rotation on the housing side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP10169896.7A 2009-07-23 2010-07-16 Exzenterschneckenpumpe Withdrawn EP2278164A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0955175A FR2948424B1 (fr) 2009-07-23 2009-07-23 Pompe a cavites progressives et dispositif de pompage associe

Publications (2)

Publication Number Publication Date
EP2278164A2 true EP2278164A2 (de) 2011-01-26
EP2278164A3 EP2278164A3 (de) 2017-05-17

Family

ID=42111694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10169896.7A Withdrawn EP2278164A3 (de) 2009-07-23 2010-07-16 Exzenterschneckenpumpe

Country Status (5)

Country Link
US (1) US20110020160A1 (de)
EP (1) EP2278164A3 (de)
JP (1) JP2011027108A (de)
CN (1) CN101985941A (de)
FR (1) FR2948424B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3882462A1 (de) * 2020-03-20 2021-09-22 Pl2M Baustellenmaschine

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
US9358639B2 (en) * 2013-09-16 2016-06-07 Markem-Imaje Corporation Connector for adjustable configurations
JP6349565B2 (ja) * 2014-01-28 2018-07-04 兵神装備株式会社 一軸偏心ネジポンプ
JP6349566B2 (ja) * 2014-01-28 2018-07-04 兵神装備株式会社 一軸偏心ネジポンプ
CN105370563B (zh) * 2014-08-19 2018-08-21 中联重科股份有限公司 一种螺杆泵
DE102014117932B3 (de) * 2014-12-04 2016-03-31 Netzsch Pumpen & Systeme Gmbh Längenausgleichsvorrichtung
DE102015104300B4 (de) * 2015-03-23 2016-12-01 Pumpenfabrik Wangen Gmbh Exzenterschneckenpumpe und Verfahren zum Ausbau eines Stators aus einer derartigen Exzenterschneckenpumpe
CN105484997B (zh) * 2016-01-11 2017-06-09 西南石油大学 用于泵送多相介质的高压螺杆泵
DE202016008445U1 (de) * 2016-09-22 2018-01-05 Seepex Gmbh Exzenterschneckenpumpe
CN108938071A (zh) * 2018-06-07 2018-12-07 佛山市长郡科技有限公司 一种骨水泥注射装置
CN108938072A (zh) * 2018-06-07 2018-12-07 佛山市长郡科技有限公司 一种骨水泥注射控制装置及其使用方法
CN108825511A (zh) * 2018-07-23 2018-11-16 无锡唯勒科技有限公司 单螺杆转子泵

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3882462A1 (de) * 2020-03-20 2021-09-22 Pl2M Baustellenmaschine
FR3108345A1 (fr) * 2020-03-20 2021-09-24 Pl2M Machine de chantier

Also Published As

Publication number Publication date
FR2948424B1 (fr) 2017-07-21
JP2011027108A (ja) 2011-02-10
EP2278164A3 (de) 2017-05-17
US20110020160A1 (en) 2011-01-27
CN101985941A (zh) 2011-03-16
FR2948424A1 (fr) 2011-01-28

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