CA2553795C - Eccentric screw pump with integrated drive - Google Patents
Eccentric screw pump with integrated drive Download PDFInfo
- Publication number
- CA2553795C CA2553795C CA002553795A CA2553795A CA2553795C CA 2553795 C CA2553795 C CA 2553795C CA 002553795 A CA002553795 A CA 002553795A CA 2553795 A CA2553795 A CA 2553795A CA 2553795 C CA2553795 C CA 2553795C
- Authority
- CA
- Canada
- Prior art keywords
- armature
- rotor
- screw pump
- eccentric screw
- 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.)
- Expired - Fee Related
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Classifications
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- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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- 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
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- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
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- 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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/008—Prime movers
-
- 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
Abstract
The invention relates to an eccentric screw pump which comprises a stator (2) and a rotor (1) rotating therein as well as a drive motor for driving the rotor. The armature (3) of the drive motor is non-rotationally linked with the rotor and rotates inside a cylindrical pot (5) on an eccentric orbit. The torque for driving the rotor is generated by means of a stator winding (4).
Description
ECCENTRIC SCREW PUMP WITH INTEGRATED DRIVE
Field of the Invention The invention relates to a screw or eccentric screw pump such as is used especially for conveying highly viscous media or media mixed with solids.
Background Eccentric screw pumps corresponding to the prior art generally have a fixed external stator and a rotor running therein. The rotor is generally driven by an external electric motor which is connected to the rotor by means of a Cardan shaft or flexible shaft. In the following descriptions no further distinction is made between screw and eccentric screw pumps since this has no effects on the principle forming the basis of the invention.
However, known eccentric screw pumps have a long overall shape and require maintenance because of the large number of moving parts in the motor, Cardan shaft and pump. In addition, in such an arrangement a seal with respect to the Cardan shaft is required on at least one side of the pump.
The arrangement from DE 102 51 846 Al represents a substantial improvement here. Herein the rotor of an eccentric screw pump is at the same time part of the motor.
Thus, the Cardan shaft in particular can be omitted. Such an arrangement has the disadvantage that only special rotors equipped with expensive magnetic materials can be used.
Furthermore, as a result of the helical arrangement of the stator, a relatively complex stator winding is obtained, which also results in relatively high production costs.
Field of the Invention The invention relates to a screw or eccentric screw pump such as is used especially for conveying highly viscous media or media mixed with solids.
Background Eccentric screw pumps corresponding to the prior art generally have a fixed external stator and a rotor running therein. The rotor is generally driven by an external electric motor which is connected to the rotor by means of a Cardan shaft or flexible shaft. In the following descriptions no further distinction is made between screw and eccentric screw pumps since this has no effects on the principle forming the basis of the invention.
However, known eccentric screw pumps have a long overall shape and require maintenance because of the large number of moving parts in the motor, Cardan shaft and pump. In addition, in such an arrangement a seal with respect to the Cardan shaft is required on at least one side of the pump.
The arrangement from DE 102 51 846 Al represents a substantial improvement here. Herein the rotor of an eccentric screw pump is at the same time part of the motor.
Thus, the Cardan shaft in particular can be omitted. Such an arrangement has the disadvantage that only special rotors equipped with expensive magnetic materials can be used.
Furthermore, as a result of the helical arrangement of the stator, a relatively complex stator winding is obtained, which also results in relatively high production costs.
Another approach to the solution is presented in DE 43 13 442 Al. As disclosed in Figure 24 for example, an eccentric screw pump is provided having an elastic stator and a rotor driven by a magnetic coupling. As a result of this arrangement, the magnetic coupling can be mounted using a simple bearing since the movement of the screw is compensated by the elastic stator. These pumps are not suitable for high pressures as a result of the high elasticity of the stators without jackets.
EP 0 357 317 B1 discloses a motor which simultaneously implement a rotary movement and a lifting movement in conjunction with an eccentric screw pump. Here also an elastic stator a without jacket is used to compensate for the eccentric movement of the screw. Thus, this pump is not suitable for high pressures.
Summary of the Invention It is the object of the invention to configure an eccentric screw pump in such a manner that the torque required to drive the pump can be supplied without additional means which extend the overall shape of the pump and without shaft seals and shaft bearings and at the same time, the pump is also suitable for high pressures.
Certain exemplary embodiments can provide an eccentric screw pump, comprising: a. a stator and a rotor running therein;
and b. a drive motor connected to the rotor for driving the rotor; the drive motor includes a first stator winding and a first armature; the first armature being constructed as an approximately cylindrical armature rotatable on an eccentric orbit inside an approximately cylindrical pot on which the first stator winding is arranged; the first armature and the rotor are rigidly connected.
EP 0 357 317 B1 discloses a motor which simultaneously implement a rotary movement and a lifting movement in conjunction with an eccentric screw pump. Here also an elastic stator a without jacket is used to compensate for the eccentric movement of the screw. Thus, this pump is not suitable for high pressures.
Summary of the Invention It is the object of the invention to configure an eccentric screw pump in such a manner that the torque required to drive the pump can be supplied without additional means which extend the overall shape of the pump and without shaft seals and shaft bearings and at the same time, the pump is also suitable for high pressures.
Certain exemplary embodiments can provide an eccentric screw pump, comprising: a. a stator and a rotor running therein;
and b. a drive motor connected to the rotor for driving the rotor; the drive motor includes a first stator winding and a first armature; the first armature being constructed as an approximately cylindrical armature rotatable on an eccentric orbit inside an approximately cylindrical pot on which the first stator winding is arranged; the first armature and the rotor are rigidly connected.
Other embodiments provide an eccentric screw pump, comprising a stator and a rotor running therein. A drive motor is provided for driving the rotor which is connected to the rotor. This drive motor comprises an armature as well as a stator winding. The armature is constructed as an approximately cylindrical armature and rotates on an eccentric orbit inside an approximately cylindrical pot as a result of its rigid connection to the rotor. This pot is at least partly enclosed by a stator winding. Alternatively, the stator winding can also be integrated in this pot. As a result of such an arrangement, the drive and pump are integrated in an extremely space-saving manner in a single unit. At the same time, the mechanical construction is substantially simplified. Thus, no vulnerable Cardan shafts are required since the rotor runs completely closed in the system comprising stator and connected lines. No connection or contact is required from the rotor to points outside the system. Thus, the pump consisting of the rotor and the stator can be flange-mounted into an existing pipe without additional connections and shaft seals.
As a result of the arrangement according to various embodiments, the conversion member such as a Cardan shaft or a flexible shaft, for example, for transformation of the centric rotation of the drive motor into the eccentric movement of the rotor can also be omitted.
In a particularly advantageous embodiment, a second armature is provided as an approximately cylindrical armature. This armature is disposed on the end of the rotor opposite to the first armature. This armature is rigidly connected to the rotor and thus also rotates on an eccentric orbit inside a second pot. This second pot is likewise enclosed by a second stator winding or contains a second stator winding.
A further advantageous embodiment consists in that the motor comprising the armature and the stator winding is embodied in the form of a reluctance motor. For this purpose, the stator winding has coils for producing a rotating magnetic field. Located in the armature is a preferably tooth-shaped part made of magnetically conductive or soft magnetic material, such as iron for example. In this case, the teeth are aligned according to the magnetic field. A rotation of the rotor can thus be achieved by a rotation of the magnetic field.
A control unit is provided for controlling the corresponding parts of the stator winding. This now controls the current flow through the stator winding in such a manner that in order to produce a torque, the flux is preferably guided through those areas of the pot which are at a minimal distance from the surface of the armature.
A position sensor which indicates the exact position of the rotor or the armature in relation to the stator is preferably provided for correct control of the coils. Such a position sensor can, for example, be implemented using magnets integrated in the rotor.
In a further advantageous embodiment, the motor is designed in the form of an asynchronous motor. For this purpose, the armature is embodied as a resistance armature or preferably as a short-circuiting armature. Furthermore, windings for producing a rotating field are provided in the stator winding. The rotating field induces voltages in the rotor windings or in the conducting rotor structure which results in corresponding currents depending on the electrical resistance of the windings or the conducting rotor structure. These currents in turn produce a magnetic field and therefore a torque. An optional control circuit, advantageously a frequency inverter, is provided for controlling the windings to produce the phase-shifted signals of variable frequency to generate a rotating field of the desired frequency of rotation.
As a result of the arrangement according to various embodiments, the conversion member such as a Cardan shaft or a flexible shaft, for example, for transformation of the centric rotation of the drive motor into the eccentric movement of the rotor can also be omitted.
In a particularly advantageous embodiment, a second armature is provided as an approximately cylindrical armature. This armature is disposed on the end of the rotor opposite to the first armature. This armature is rigidly connected to the rotor and thus also rotates on an eccentric orbit inside a second pot. This second pot is likewise enclosed by a second stator winding or contains a second stator winding.
A further advantageous embodiment consists in that the motor comprising the armature and the stator winding is embodied in the form of a reluctance motor. For this purpose, the stator winding has coils for producing a rotating magnetic field. Located in the armature is a preferably tooth-shaped part made of magnetically conductive or soft magnetic material, such as iron for example. In this case, the teeth are aligned according to the magnetic field. A rotation of the rotor can thus be achieved by a rotation of the magnetic field.
A control unit is provided for controlling the corresponding parts of the stator winding. This now controls the current flow through the stator winding in such a manner that in order to produce a torque, the flux is preferably guided through those areas of the pot which are at a minimal distance from the surface of the armature.
A position sensor which indicates the exact position of the rotor or the armature in relation to the stator is preferably provided for correct control of the coils. Such a position sensor can, for example, be implemented using magnets integrated in the rotor.
In a further advantageous embodiment, the motor is designed in the form of an asynchronous motor. For this purpose, the armature is embodied as a resistance armature or preferably as a short-circuiting armature. Furthermore, windings for producing a rotating field are provided in the stator winding. The rotating field induces voltages in the rotor windings or in the conducting rotor structure which results in corresponding currents depending on the electrical resistance of the windings or the conducting rotor structure. These currents in turn produce a magnetic field and therefore a torque. An optional control circuit, advantageously a frequency inverter, is provided for controlling the windings to produce the phase-shifted signals of variable frequency to generate a rotating field of the desired frequency of rotation.
Grooves for receiving rotor windings can optionally be provided in the rotor.
A different embodiment of the invention provides that axial holes through which the medium can flow are preferably provided in the armature. Thus, a diversion channel for the medium is no longer necessary. A particularly compact, space-saving structure of the arrangement is thus obtained.
In another advantageous embodiment of the invention, the magnetic components or permanent magnets in the armature as well as the coils in the stator are arranged so that a pre-determined force is exerted in the axial direction on the rotor. It is especially advantageous if the axial force counteracts the pump pressure with the same strength.
Preferably used to monitor the rotor position is a position controller which controls the position of the rotor using at least one position sensor.
A further embodiment of the invention provides a rotor which can be displaced in the axial direction by the axial force.
A reduction in the break-away torque when starting up the pump can be achieved by means of this displaceability.
Likewise, the pump outlet can thereby be closed by the rotor itself, for example. Alternatively, a valve body can naturally also be actuated by the axial movement of the rotor. Especially in the case of metering pumps, this allows particularly fine metering, free from overrun.
In a further advantageous embodiment of the invention coils in the armature have opposite polarity to the coils which transmit the torque to the rotor. As a result of this controllable reverse polarity, a force is produced in the rotor which acts in the direction opposite to the direction of flow of the pumped medium and thereby compensates or reduced the hydraulic forces produced by the medium on the front sides of the rotor. The required numbers of coils of inverse polarity can be variably adapted to the conveying pressure produced.
Description of the Figures The invention is described hereinafter using exemplary embodiments with reference to the drawings without restricting the general inventive idea.
Fig. 1 is a schematic view showing a device according to the invention in general form.
Fig. 2 is a perspective view showing a device according to the invention in general form.
Fig. 3 shows a device according to the invention with a second armature.
Fig. 4 is a perspective view of a device according to the invention with a second armature.
Detailed Description Fig. 1 is a schematic diagram showing a device according to the invention in a section perpendicular to the axis of rotation. An eccentric screw pump has a rotor 1 which moves in a stator 2. The rotor 1 is rigidly connected to an armature 3. The armature rotates on an eccentric orbit inside the pot 5. In this case, the medium to be conveyed passes through the pot 5. At least one stator winding 4 is provided to produce the torque. In the exemplary embodiment the stator winding is integrated in the pot but can preferably be arranged outside the pot and thus outside the medium. However, it can optionally be integrated in the pot, for example, potted. The stator winding comprises individual coils. These coils can optionally be supplied with current by a control unit.
A position sensor which indicates the exact position of the rotor or the armature in relation to the stator or the pot, is preferably provided for correct control of the coils.
Such a position sensor can be implemented, for example by means of or with the aid of the magnets integrated in the rotor.
Figure 2 shows the arrangement shown previously in perspective view.
Figure 3 shows another device according to the invention with a second armature 3a. This second armature is arranged on the end of the rotor opposite to the first armature.
Accordingly, a second pot 5a and a second stator winding 4a are allocated to the second armature to produce the torque.
In such an arrangement it is advantageous if the two armatures are constructed such that they produce an axial thrust force directed towards one another which holds the two armatures and the rotor in a predetermined position. For this purpose the armatures can advantageously be constructed as at least slightly tapered.
Fig. 4 shows the arrangement shown previously in perspective view.
Reference list 1 Rotor 2 Stator 3 Armature 4 Winding Pot
A different embodiment of the invention provides that axial holes through which the medium can flow are preferably provided in the armature. Thus, a diversion channel for the medium is no longer necessary. A particularly compact, space-saving structure of the arrangement is thus obtained.
In another advantageous embodiment of the invention, the magnetic components or permanent magnets in the armature as well as the coils in the stator are arranged so that a pre-determined force is exerted in the axial direction on the rotor. It is especially advantageous if the axial force counteracts the pump pressure with the same strength.
Preferably used to monitor the rotor position is a position controller which controls the position of the rotor using at least one position sensor.
A further embodiment of the invention provides a rotor which can be displaced in the axial direction by the axial force.
A reduction in the break-away torque when starting up the pump can be achieved by means of this displaceability.
Likewise, the pump outlet can thereby be closed by the rotor itself, for example. Alternatively, a valve body can naturally also be actuated by the axial movement of the rotor. Especially in the case of metering pumps, this allows particularly fine metering, free from overrun.
In a further advantageous embodiment of the invention coils in the armature have opposite polarity to the coils which transmit the torque to the rotor. As a result of this controllable reverse polarity, a force is produced in the rotor which acts in the direction opposite to the direction of flow of the pumped medium and thereby compensates or reduced the hydraulic forces produced by the medium on the front sides of the rotor. The required numbers of coils of inverse polarity can be variably adapted to the conveying pressure produced.
Description of the Figures The invention is described hereinafter using exemplary embodiments with reference to the drawings without restricting the general inventive idea.
Fig. 1 is a schematic view showing a device according to the invention in general form.
Fig. 2 is a perspective view showing a device according to the invention in general form.
Fig. 3 shows a device according to the invention with a second armature.
Fig. 4 is a perspective view of a device according to the invention with a second armature.
Detailed Description Fig. 1 is a schematic diagram showing a device according to the invention in a section perpendicular to the axis of rotation. An eccentric screw pump has a rotor 1 which moves in a stator 2. The rotor 1 is rigidly connected to an armature 3. The armature rotates on an eccentric orbit inside the pot 5. In this case, the medium to be conveyed passes through the pot 5. At least one stator winding 4 is provided to produce the torque. In the exemplary embodiment the stator winding is integrated in the pot but can preferably be arranged outside the pot and thus outside the medium. However, it can optionally be integrated in the pot, for example, potted. The stator winding comprises individual coils. These coils can optionally be supplied with current by a control unit.
A position sensor which indicates the exact position of the rotor or the armature in relation to the stator or the pot, is preferably provided for correct control of the coils.
Such a position sensor can be implemented, for example by means of or with the aid of the magnets integrated in the rotor.
Figure 2 shows the arrangement shown previously in perspective view.
Figure 3 shows another device according to the invention with a second armature 3a. This second armature is arranged on the end of the rotor opposite to the first armature.
Accordingly, a second pot 5a and a second stator winding 4a are allocated to the second armature to produce the torque.
In such an arrangement it is advantageous if the two armatures are constructed such that they produce an axial thrust force directed towards one another which holds the two armatures and the rotor in a predetermined position. For this purpose the armatures can advantageously be constructed as at least slightly tapered.
Fig. 4 shows the arrangement shown previously in perspective view.
Reference list 1 Rotor 2 Stator 3 Armature 4 Winding Pot
Claims (13)
1. An eccentric screw pump, comprising:
a. a stator and a rotor running therein; and b. a drive motor connected to the rotor for driving the rotor; the drive motor includes a first stator winding and a first armature; the first armature being constructed as an approximately cylindrical armature rotatable on an eccentric orbit inside an approximately cylindrical pot on which the first stator winding is arranged; the first armature and the rotor are rigidly connected.
a. a stator and a rotor running therein; and b. a drive motor connected to the rotor for driving the rotor; the drive motor includes a first stator winding and a first armature; the first armature being constructed as an approximately cylindrical armature rotatable on an eccentric orbit inside an approximately cylindrical pot on which the first stator winding is arranged; the first armature and the rotor are rigidly connected.
2. The eccentric screw pump according to claim 1, further comprising a second armature arranged as an approximately cylindrical armature on an end of the rotor opposite to the first armature and rotatable on an eccentric orbit inside the approximately cylindrical pot on which a second stator winding is arranged.
3. The eccentric screw pump according to claim 1 or 2, further comprising a plurality of rotors each having a following armature arranged as a chain of armatures and rotors.
4. The eccentric screw pump according to any one of claims 1 to 3, further comprising magnets selected from the group consisting of permanent magnets, reluctance magnets, and soft magnets provided in the first armature, the second armature, or the chain of armatures.
5. The eccentric screw pump according to claim 1, further comprising a control unit for controlling the first stator winding based on a position of the first armature thereby exerting a torque on the rotor, wherein magnetic flux is guided through regions of the pot having a minimal distance from a surface of the first armature.
6. The eccentric screw pump according to claim 2, further comprising a control unit for controlling the first and second stator windings based on a position of the first and second armatures, respectively, thereby exerting a torque on the rotor, wherein magnetic flux is guided through regions of the pot having a minimal distance from a surface of the first and second armatures.
7. The eccentric screw pump according to any one of claims 1 to 6, wherein the first armature, the second armature and the chain of armatures include holes through which a medium can flow.
8. The eccentric screw pump according to claim 1, further comprising permanent magnets and coils arranged in the first armature for exerting an axial force on the rotor.
9. The eccentric screw pump according to claim 8, wherein the permanent magnets and the coils of the first armature are arranged in a plurality of groups wherein the axial force of each one of the plurality of groups act on the rotor in opposite directions.
10. The eccentric screw pump according to claim 8 or 9, wherein the rotor is displaceable based on the exerted axial force.
11. The eccentric screw pump according to claim 8 or 9, wherein additional axial force is exerted or an axial movement is generated to reduce break-away torque during pump startup.
12. The eccentric screw pump according to claim 8 or 9, wherein an axial movement is generated to close a pump outlet of the pump.
13. The eccentric screw pump according to claim 8 or 9, wherein an axial movement is generated to actuate a valve body of the pump.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004038686.2 | 2004-08-10 | ||
| DE102004038686A DE102004038686B3 (en) | 2004-08-10 | 2004-08-10 | Spiral pump e.g. for integrated drive, has rotor which runs in it and driving motor connected to rotor such as fixed winding, and runners surrounding rotor and covered by housing |
| PCT/DE2005/001251 WO2006015571A1 (en) | 2004-08-10 | 2005-07-15 | Eccentric screw pump with integrated drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2553795A1 CA2553795A1 (en) | 2006-02-16 |
| CA2553795C true CA2553795C (en) | 2009-07-14 |
Family
ID=34802032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002553795A Expired - Fee Related CA2553795C (en) | 2004-08-10 | 2005-07-15 | Eccentric screw pump with integrated drive |
Country Status (13)
| Country | Link |
|---|---|
| US (1) | US20070104595A1 (en) |
| EP (1) | EP1778980B1 (en) |
| JP (1) | JP2008509335A (en) |
| KR (1) | KR100874043B1 (en) |
| CN (1) | CN100460680C (en) |
| AT (1) | ATE377150T1 (en) |
| BR (1) | BRPI0513307A (en) |
| CA (1) | CA2553795C (en) |
| DE (3) | DE102004038686B3 (en) |
| ES (1) | ES2294727T3 (en) |
| MX (1) | MXPA06011759A (en) |
| RU (1) | RU2361116C2 (en) |
| WO (1) | WO2006015571A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5190618B2 (en) * | 2007-08-20 | 2013-04-24 | 兵神装備株式会社 | Rotor drive mechanism and pump device |
| DE102008039973A1 (en) | 2008-08-27 | 2010-03-04 | Wmf Württembergische Metallwarenfabrik Ag | Cavity Pump |
| DE102009024088A1 (en) | 2009-06-06 | 2010-12-09 | Zeus Gmbh | Tire filler, method for producing a tire filling and apparatus for carrying out the method |
| MD4338C1 (en) * | 2013-05-21 | 2015-10-31 | Юрий ЩИГОРЕВ | Screw electric pump with autonomous cooling |
| CN103423064B (en) * | 2013-08-29 | 2016-12-28 | 中矿瑞杰(北京)科技有限公司 | A kind of fluid-power motor |
| EP3112682B1 (en) | 2014-05-12 | 2021-07-07 | Hugo Vogelsang Maschinenbau GmbH | Eccentric screw pump with assembly through the hollow rotor |
| JP6635694B2 (en) * | 2014-08-05 | 2020-01-29 | 兵神装備株式会社 | Pump body, pump device, flow meter and generator |
| WO2017154023A1 (en) * | 2016-03-07 | 2017-09-14 | Sona Pumps | Motor with positive displacement helical pump inside motor shaft |
| BE1025347B1 (en) * | 2017-06-28 | 2019-02-05 | Atlas Copco Airpower Naamloze Vennootschap | CYLINDRICAL SYMMETRIC VOLUMETRIC MACHINE |
| CN113062859A (en) * | 2021-04-21 | 2021-07-02 | 中国石油大学(华东) | Rotor built-in type machine-pump integrated all-metal screw pump oil production device |
Family Cites Families (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2212417A (en) * | 1938-02-10 | 1940-08-20 | Robbins & Myers | Combined motor and pump |
| US2957427A (en) * | 1956-12-28 | 1960-10-25 | Walter J O'connor | Self-regulating pumping mechanism |
| FR1559710A (en) * | 1966-12-26 | 1969-03-14 | ||
| US3951097A (en) * | 1975-05-01 | 1976-04-20 | Wallace Clark | Hydraulic motor or pump |
| US4981281A (en) * | 1983-12-21 | 1991-01-01 | Robert W. Brundage | Solenoid controlled fluid flow valve |
| DE3621967A1 (en) * | 1986-07-01 | 1988-01-14 | Heinrich Josef Lettmann | Pipe-shaped pump unit with drive motor |
| US4802827A (en) * | 1986-12-24 | 1989-02-07 | Kabushiki Kaisha Toshiba | Compressor |
| JP2619642B2 (en) * | 1987-05-30 | 1997-06-11 | 京セラ株式会社 | Eccentric screw pump |
| FR2617534A1 (en) * | 1987-06-30 | 1989-01-06 | Inst Francais Du Petrole | DEVICE FOR PUMPING A FLUID INTO THE BOTTOM OF A WELL |
| GB8820444D0 (en) * | 1988-08-30 | 1988-09-28 | Framo Dev Ltd | Electric motor |
| DE4313442A1 (en) * | 1993-04-24 | 1994-10-27 | Resch Maschinen Und Geraetebau | Fluid pump |
| US5759019A (en) * | 1994-02-14 | 1998-06-02 | Steven M. Wood | Progressive cavity pumps using composite materials |
| US5549160A (en) * | 1994-05-27 | 1996-08-27 | National-Oilwell Canada Ltd. | Downhole progressing cavity pump rotor valve |
| US5549464A (en) * | 1994-10-29 | 1996-08-27 | Varadan; Rajan | Drive arrangement for progressing cavity pump |
| US5779460A (en) * | 1996-06-07 | 1998-07-14 | Ici Canada Inc. | Progressive cavity pump with tamper-proof safety |
| CN1068935C (en) * | 1998-01-26 | 2001-07-25 | 宋志超 | Metal stator screw pump |
| JP4365984B2 (en) * | 1999-05-14 | 2009-11-18 | キヤノン株式会社 | Manufacturing method of recycled plastic material |
| US7374005B2 (en) * | 2000-01-10 | 2008-05-20 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Opposing pump/motors |
| US6361292B1 (en) * | 2000-04-12 | 2002-03-26 | Sheldon S. L. Chang | Linear flow blood pump |
| DE10123139B4 (en) * | 2001-04-30 | 2005-08-11 | Berlin Heart Ag | Method for controlling a support pump for pulsatile pressure fluid delivery systems |
| CN2528964Y (en) * | 2002-03-08 | 2003-01-01 | 宋其国 | External driving double-rotation helicoidal pump |
| DE10251846A1 (en) * | 2002-11-07 | 2004-05-19 | Netzsch-Mohnopumpen Gmbh | pump drive |
| US7074018B2 (en) * | 2003-07-10 | 2006-07-11 | Sheldon Chang | Direct drive linear flow blood pump |
| US7699586B2 (en) * | 2004-12-03 | 2010-04-20 | Heartware, Inc. | Wide blade, axial flow pump |
| US7226277B2 (en) * | 2004-12-22 | 2007-06-05 | Pratt & Whitney Canada Corp. | Pump and method |
-
2004
- 2004-08-10 DE DE102004038686A patent/DE102004038686B3/en not_active Expired - Fee Related
-
2005
- 2005-07-15 EP EP05768100A patent/EP1778980B1/en not_active Not-in-force
- 2005-07-15 AT AT05768100T patent/ATE377150T1/en not_active IP Right Cessation
- 2005-07-15 KR KR1020067015387A patent/KR100874043B1/en not_active IP Right Cessation
- 2005-07-15 CN CNB2005800263773A patent/CN100460680C/en not_active Expired - Fee Related
- 2005-07-15 BR BRPI0513307-6A patent/BRPI0513307A/en not_active IP Right Cessation
- 2005-07-15 MX MXPA06011759A patent/MXPA06011759A/en active IP Right Grant
- 2005-07-15 JP JP2007525158A patent/JP2008509335A/en active Pending
- 2005-07-15 RU RU2006145438/06A patent/RU2361116C2/en not_active IP Right Cessation
- 2005-07-15 ES ES05768100T patent/ES2294727T3/en active Active
- 2005-07-15 WO PCT/DE2005/001251 patent/WO2006015571A1/en active IP Right Grant
- 2005-07-15 DE DE112005002517T patent/DE112005002517A5/en not_active Withdrawn
- 2005-07-15 CA CA002553795A patent/CA2553795C/en not_active Expired - Fee Related
- 2005-07-15 DE DE502005001849T patent/DE502005001849D1/en active Active
-
2006
- 2006-12-28 US US11/617,538 patent/US20070104595A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1778980B1 (en) | 2007-10-31 |
| KR100874043B1 (en) | 2008-12-12 |
| MXPA06011759A (en) | 2007-05-31 |
| CN100460680C (en) | 2009-02-11 |
| DE112005002517A5 (en) | 2007-07-12 |
| ES2294727T3 (en) | 2008-04-01 |
| CN101006276A (en) | 2007-07-25 |
| WO2006015571A1 (en) | 2006-02-16 |
| US20070104595A1 (en) | 2007-05-10 |
| JP2008509335A (en) | 2008-03-27 |
| ATE377150T1 (en) | 2007-11-15 |
| KR20070033954A (en) | 2007-03-27 |
| EP1778980A1 (en) | 2007-05-02 |
| DE502005001849D1 (en) | 2007-12-13 |
| BRPI0513307A (en) | 2008-05-06 |
| RU2361116C2 (en) | 2009-07-10 |
| DE102004038686B3 (en) | 2005-08-25 |
| RU2006145438A (en) | 2008-09-20 |
| CA2553795A1 (en) | 2006-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20140715 |