EP1552149A1 - Stator for a spindle drag pump - Google Patents
Stator for a spindle drag pumpInfo
- Publication number
- EP1552149A1 EP1552149A1 EP03794786A EP03794786A EP1552149A1 EP 1552149 A1 EP1552149 A1 EP 1552149A1 EP 03794786 A EP03794786 A EP 03794786A EP 03794786 A EP03794786 A EP 03794786A EP 1552149 A1 EP1552149 A1 EP 1552149A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segments
- hollow body
- elastic material
- jacket
- another
- 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
Links
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 invention relates to a stator for an eccentric screw pump with a helical rotor.
- the stator has a likewise helically shaped cavity for receiving the rotor and usually consists of an elastic material which is enclosed by a rigid jacket.
- a rotor shell which consists of three identical, axially arranged shell segments, which are clamped together by means of a tape.
- 3 adapted to the circumference of the rotor shroud segments and the corresponding clamping means for clamping the rotor shell to the rotor itself are necessary. Without these clamping means, the shell segments can not be held on the rotor.
- DE 33 12 197 C2 is a progressing cavity pump with a jacket, which has interconnected by positive locking segments, known. The edges of adjacent segments are designed such that they engage each other in the manner of tongue and groove. These tongue and groove fasteners have contact surfaces so that they do not move relative to each other.
- the object of the invention is to design the stator of an eccentric cam pump such that a cost-effective and simplified construction is possible.
- the stator for eccentric screw pumps comprises a hollow body of elastic material, which is enclosed by a jacket made of segments.
- the longitudinal sides are formed such that adjacent segments along the circumference are variable in angle or movably connected to each other to produce a load on train positive connection. In a typical case, such an angular range is about 10 °.
- different numbers of elements to different diameters of the coats can be combined. For example, 10, 11, 12, 13 or even 14 segments can be combined to form a jacket, each having the segment number corresponding to the diameter.
- segments of different widths can be combined. This is already with a few (for example two) different profiles by corresponding combinations and different numbers a variety of different diameters of the shell feasible.
- the specification of the length of a segment always refers to the extension in the longitudinal direction of the stator.
- the individual segments are designed such that their surfaces lie predominantly in one plane.
- the result of the connection of several segments is a closed jacket in polygonal shape.
- This polygon shape now engages in a corresponding polygonal shape of the outside of the hollow body of elastic material, so that there is a form fit for transmitting the torque.
- the segments themselves can be made from a variety of different materials. Particularly suitable are metallic, ceramic, elastomeric or thermoplastic materials.
- the segments may consist of combinations of different materials. Thus, for example, a combination of a metallic longitudinal edge and an elastomer disposed between the longitudinal sides to compensate for tolerances can be used.
- connection between the individual segments is designed in the manner of tongue and groove.
- the segments connected in this way are movable relative to one another.
- connection of the segments with each other is designed such that they can be pushed together in the longitudinal direction.
- the complete unit is particularly low, by simply pushing the segments together, mountable.
- Another embodiment of the invention provides that the segments have bores extending in the longitudinal direction.
- Another embodiment of the invention provides that the longitudinal sides of the segments edged profiles, such as polygon or Schwalben- tail profiles have. In order to ensure sufficient mobility here appropriate distances are provided.
- Another embodiment of the invention provides that the length of individual segments is shorter than the length of the hollow body.
- at least two segments can be arranged one behind the other in the longitudinal direction of the hollow body.
- At least two longitudinally successive segments can be laterally, i. in the direction of the circumference of the hollow body, be offset from each other.
- the offset preferably corresponds to the width of a single segment.
- At least two segments are in
- Segments are connected together in the form of a large chain. So is, Particularly in the case of a large number of small chain links, optionally in the longitudinal direction or in the direction of the circumference, adaptation to the desired length of the hollow body or the circumference of the hollow body is possible.
- At least a plurality of segments in the form of chain links are provided with spacers or integrated connecting elements.
- several such segments can be combined into a composite in a first preassembly step.
- Such pre-assembly is possible in a simple manner with an automatic assembly machine.
- For final assembly to the hollow body then only a few rows of chain links, for example by means of bolts, must be connected to each other.
- the connecting elements With a suitable arrangement of the connecting elements, the last chain link can be mounted rotated in a row by 180 degrees, so that the row of chain links is flush.
- means are provided for limiting the angular range of movement of the segments with each other.
- the mobility of the mounted polygon can be restricted in order to simplify the mountability, to prevent a jamming of the segments with one another or also to prevent the stiffness of the segment
- an additional non-positive connection of the longitudinal sides of the segments is provided.
- a connection can be, for example, a welded connection or also an adhesive connection.
- Such a connection is usefully made after the individual segments have been pushed together.
- the frictional connection by means of the frictional connection, the individual segments can be fixed together in a predetermined angle corresponding to the final configuration.
- an additional frictional connection between at least one, preferably a plurality of segments and the hollow body made of elastic material is provided. Such a connection can take place, for example, by vulcanization or gluing.
- At least one segment has a surface with a particularly high roughness or additional holding teeth or a corrugation. This particular surface of the segment faces the hollow body. Due to the rough surface, the friction between the segments and the hollow body can be substantially increased, whereby the twisting / twisting of the hollow body is avoided during the rotation of the rotor.
- At least one segment has at least one additional contact surface for supporting the hollow body.
- the contact surface of the hollow body at the segments d. H. the area of the introduction of force between the hollow body and the segments to be increased. This leads to a higher stability and a lower deformation of the hollow body.
- the hollow body made of elastic material is designed such that it overlaps the segments at the end faces. This results in a sealing of the segments by the elastic material of the hollow body.
- a further embodiment of the invention provides that at least some segments consist of a mechanically rigid material which has a substantially higher stiffness relative to the hollow body of elastic material. In a further advantageous embodiment of the invention, at least some of the segments have an elastic material.
- a further embodiment of the invention is that at least one clamping means is provided, with which the diameter of the shell consisting of segments can be fixed or adjusted. This makes it possible to make an adjustment of the diameter with increasing wear of the hollow body made of elastic material.
- Another embodiment of the invention provides additional support rings, which support the segments from the outside. As a result, the individual segments can not deform outward even at high pressures in the hollow body.
- the equipment with support rings can be made variable, so that according to the pressure in the hollow body at higher pressure, a correspondingly higher number of support rings is used.
- the thermal expansion coefficient of the segments is dimensioned such that it compensates the coefficient of thermal expansion of the hollow body of elastic material.
- At least one loosely insertable anti-twist device is provided between the hollow body and the stator jacket.
- This can for example consist of a rod or a profile, which is advantageously inserted in the longitudinal direction and represents a positive connection between the shell and the hollow body.
- An inventive hollow body of a stator for eccentric screw pumps made of elastic material has a helical cavity for receiving a rotor and an outside with a polygonal cross-section.
- the polygonal outer side is doing with a frictional connection the polygonal inside of the shell. It is immaterial whether the individual faces of the polygon are the same size or different. It is essential that the hollow body has a plurality of longitudinally extending surfaces.
- Fig. 1 shows in a general form schematically a device according to the invention.
- Fig. 2 shows a jacket according to the invention in a perspective view.
- Fig. 3 shows a single segment.
- Fig. 4 shows segments of different lengths.
- FIGS. 5 to 7 show different combinations of segments
- Fig. 8 shows segments with support rings
- a stator for eccentric screw pumps has a hollow body 1 of preferably elastic material.
- a likewise helical rotor 3 is accommodated in a helical cavity 2.
- the outer contour of the hollow body 1 made of elastic material has a polygonal cross-section.
- the jacket, which comprises the hollow body consists of a plurality of segments 4a, 4b, 4c, which extend in the longitudinal direction (axially) of the hollow body. The segments are positively connected with each other.
- the compound is resilient to train and thus limits the extent of the circumference of the hollow body.
- an inventive jacket is shown in perspective.
- This jacket consists in this example of 12 segments, three of which are exemplified by 4a, 4b, 4c.
- executives with other segment numbers, such as 10 segments or even 14 segments can be realized.
- at least three segments are necessary to enclose a cavity.
- the upper limit for the number of segments results from the cost-effectiveness of the assembly. So a coat with an extremely high number of segments will be mountable only at high cost. Unless he is, as described later, realized in the form of a chain.
- FIG. 3 shows a single segment 4 in section.
- the connection of the individual segments with each other takes place here by a first connecting element 5, which is in engagement with a second connecting element 6 of another segment. Due to the special embodiment proposed here, the segments are movable relative to one another in a certain angular range.
- Fig. 4 for example, segments of different width are shown, from which can be produced by combination coats of different diameters. These are hereinafter referred to as Type 1 (11), Type 2 (10), Type 3 (9) and Type 4 (8). Of course, any dimensions of segments are the subject of the invention.
- FIG. 5 shows a combination of 6 segments of the type 4 (8) and of the type 3 (9), wherein the segments of different types are each alternately combined with one another.
- FIG. 6 shows a further combination of different segments. There are five segments of type 4 (8) and type 2 (10) each alternately combined. This results in comparison to the arrangement shown in Fig. 5, another shape of the outer contour and another diameter.
- a combination of 12 similar segments of the type 3 (9) is shown.
- the representations of the different combinations of segments in the various figures are not to scale.
- Fig. 8 shows an arrangement in which preferably for receiving higher pressures additional support rings 12a, 12b, 12c are mounted.
- Such support rings preferably extend along the circumference and may themselves have fastening means such as bores, on the one hand for fixing to the segments and on the other hand for fixing the support rings themselves or the entire device.
- end rings 13 a, 13 b are shown, which additionally support the segments at their ends.
- the support can be made here preferably in the longitudinal direction but also radially, as in the support rings described above.
- a further advantageous embodiment of the invention is shown, in which the individual segments 4a, 4b, 4c are connected together in the form of a chain.
- the segments at their ends holes through which fasteners such as bolts 18, rivets or others can be inserted.
- FIG. 10 shows a single segment 4 from an arrangement according to FIG. 9.
- the bores 15 and the bearing surfaces 14 can be seen.
- the bearing surfaces serve, as far as they are associated with the hollow body of elastic material facing inside of the chain, for supporting the hollow body.
- a corresponding almost closed inner surface can be seen in FIG. 9.
- Fig. 11 shows another chain-like arrangement of the individual segments 4a, 4b, 4c.
- the interaction of the individual chain links is clearly visible.
- the connection of the individual segments to a chain takes place again with the help of the holes and the fastening elements, not shown here, which are held in these holes.
- a single segment 4 of the chain-shaped arrangement of Fig. 11 is shown.
- the bore 15 serves to connect a plurality of segments.
- the holding teeth 16 serve to increase the friction between the segments and the hollow body made of elastic material.
- Fig. 13 shows a further chain-like arrangement of individual segments 4a, 4b, 4c, wherein the segments are connected by bolts other than by additional connecting elements.
- FIG. 14 shows in a detailed view individual segments with connecting elements 17, which at the same time establish a defined distance between segments.
- the connecting elements can fix the individual segments in arbitrary axes to each other.
- a lateral or a fixation in the longitudinal direction of the stator is possible.
- FIG. 15 shows a detailed view of the assembled segments with associated connecting elements.
- This arrangement of the segments results in a relatively rigid composite.
- the overall rigidity of the shell is significantly increased. This is particularly advantageous at high pressures.
- Fig. 16 a chain-shaped arrangement is shown, in which the individual segments have particularly large bearing surfaces. This results in an almost closed inner surface.
- Fig. 17 shows a single segment of the arrangement of Fig. 16.
- the enlarged support surface 14 is particularly well recognizable.
- FIG. 18 shows a further embodiment of the segments of an arrangement from FIG. 16.
- the support surface has additional holding teeth 16.
- Fig. 19 shows another chain-like arrangement with gaps between the chain-shaped segments.
- Segment Type 1 a, 12b, 12c Support rings a, 13b End rings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10241753A DE10241753C1 (en) | 2002-09-10 | 2002-09-10 | Stator for eccentric screw pump has outside of hollow body defining rotor space enclosed by manrle assembled from linked segments |
DE10241753 | 2002-09-10 | ||
PCT/DE2003/002726 WO2004025124A1 (en) | 2002-09-10 | 2003-08-13 | Stator for a spindle drag pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1552149A1 true EP1552149A1 (en) | 2005-07-13 |
EP1552149B1 EP1552149B1 (en) | 2015-10-07 |
Family
ID=29225200
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03794786.8A Expired - Fee Related EP1552149B1 (en) | 2002-09-10 | 2003-08-13 | Stator for a progressive cavity pump |
Country Status (7)
Country | Link |
---|---|
US (1) | US7137795B2 (en) |
EP (1) | EP1552149B1 (en) |
JP (1) | JP2005538298A (en) |
AU (1) | AU2003266122A1 (en) |
BR (1) | BR0306307B1 (en) |
DE (2) | DE10241753C1 (en) |
WO (1) | WO2004025124A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005028818B3 (en) * | 2005-06-22 | 2006-08-24 | Artemis Kautschuk- Und Kunststoff-Technik Gmbh | Stator for an eccentric screw pump comprises axially arranged stator segments connected pressure-tight on their contact points by a tube pulled onto a casing and overlapping the contact points and a radially flattened metal ring |
DE102005042559A1 (en) * | 2005-09-08 | 2007-03-15 | Netzsch-Mohnopumpen Gmbh | stator |
DE102006021897B4 (en) * | 2006-05-11 | 2009-11-19 | Netzsch-Mohnopumpen Gmbh | Stator jacket for progressing cavity pumps |
ES2387834T3 (en) | 2007-08-17 | 2012-10-02 | Seepex Gmbh | Eccentric helical pump with split stator |
US8182252B2 (en) | 2007-10-30 | 2012-05-22 | Moyno, Inc. | Progressing cavity pump with split stator |
US8215014B2 (en) | 2007-10-31 | 2012-07-10 | Moyno, Inc. | Method for making a stator |
DE102012112044B4 (en) * | 2012-05-04 | 2015-10-08 | Netzsch Pumpen & Systeme Gmbh | Self-fixing stator housing |
DE102012008761B4 (en) | 2012-05-05 | 2016-01-21 | Netzsch Pumpen & Systeme Gmbh | Divided stator jacket |
EP3152451B1 (en) | 2014-06-06 | 2019-03-06 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring |
DE102017126002B3 (en) | 2017-11-07 | 2019-02-14 | Seepex Gmbh | Cavity Pump |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB799996A (en) * | 1955-07-11 | 1958-08-13 | Over Officine Venete Riunite S | Improvements in or relating to screw pumps |
FR1258107A (en) * | 1960-05-30 | 1961-04-07 | Seeberger K G Maschinen Und Ge | Worm pump |
US3084631A (en) * | 1962-01-17 | 1963-04-09 | Robbins & Myers | Helical gear pump with stator compression |
DE1553199C3 (en) * | 1966-03-15 | 1974-03-07 | Karl Dipl.-Ing. 7024 Bernhausen Schlecht | Adjustable stator for an eccentric screw pump |
DE2043609A1 (en) * | 1970-09-03 | 1972-03-09 | Zyklos Metallbau KG Dipl.-Ing. Karl Hagele, 7143 Vaihingen | Screw pump with helical rotor |
JPS4814602U (en) * | 1971-06-25 | 1973-02-19 | ||
FR2175403A5 (en) * | 1972-01-21 | 1973-10-19 | Streicher Foerdertech | |
DE2243479B2 (en) * | 1972-09-05 | 1976-12-23 | Fördertechnik Streicher GmbH, 7953 Bad Schussenried; Streicher, Max, 7988 Wangen | ADJUSTABLE STATOR FOR ECCENTRIC SCREW PUMPS |
JPS5098304U (en) * | 1974-01-11 | 1975-08-15 | ||
JPS51134204U (en) * | 1975-04-22 | 1976-10-29 | ||
US4313717A (en) * | 1979-10-04 | 1982-02-02 | Kopecky Eugene F | Adjustable pressure extrusion pump |
DE3312197A1 (en) * | 1983-04-02 | 1984-10-04 | Gummi-Jäger KG GmbH & Cie, 3000 Hannover | Adjustable stator for eccentric spiral pumps |
DE8632827U1 (en) * | 1986-12-08 | 1989-09-21 | Allweiler AG - Werk Bottrop, 4250 Bottrop | Adjustable stator for eccentric screw pumps |
DE3908193A1 (en) * | 1988-06-18 | 1990-05-23 | Ferenc J Kerekes | Appliance for fixing and sealing a Moineau pump (eccentric worm screw pump) in the riser of a liquid delivery probe |
JPH0332184U (en) * | 1989-08-08 | 1991-03-28 | ||
GB9303507D0 (en) * | 1993-02-22 | 1993-04-07 | Mono Pumps Ltd | Progressive cavity pump or motors |
JP2824637B2 (en) * | 1996-12-24 | 1998-11-11 | 株式会社ナニワ製作所 | Metal tube fittings for soft tubes |
DE10042335A1 (en) * | 2000-08-29 | 2002-03-14 | Usd Formteiltechnik Gmbh | Tubular jacket for stator of eccentric screw pump consists of two linked pivoted sections each shaped like longitudinally divided cylinder jacket |
-
2002
- 2002-09-10 DE DE10241753A patent/DE10241753C1/en not_active Expired - Fee Related
-
2003
- 2003-08-13 BR BRPI0306307-0A patent/BR0306307B1/en not_active IP Right Cessation
- 2003-08-13 EP EP03794786.8A patent/EP1552149B1/en not_active Expired - Fee Related
- 2003-08-13 DE DE10393756T patent/DE10393756D2/en not_active Withdrawn - After Issue
- 2003-08-13 WO PCT/DE2003/002726 patent/WO2004025124A1/en active Application Filing
- 2003-08-13 AU AU2003266122A patent/AU2003266122A1/en not_active Abandoned
- 2003-08-13 JP JP2004534970A patent/JP2005538298A/en active Pending
-
2005
- 2005-03-08 US US11/074,862 patent/US7137795B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004025124A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2005538298A (en) | 2005-12-15 |
AU2003266122A1 (en) | 2004-04-30 |
DE10393756D2 (en) | 2005-08-11 |
BR0306307B1 (en) | 2012-06-26 |
EP1552149B1 (en) | 2015-10-07 |
US20050147516A1 (en) | 2005-07-07 |
WO2004025124A1 (en) | 2004-03-25 |
BR0306307A (en) | 2004-09-28 |
US7137795B2 (en) | 2006-11-21 |
DE10241753C1 (en) | 2003-11-13 |
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