EP3365558A1 - Suppression d'un blocage dans une pompe - Google Patents

Suppression d'un blocage dans une pompe

Info

Publication number
EP3365558A1
EP3365558A1 EP16781725.3A EP16781725A EP3365558A1 EP 3365558 A1 EP3365558 A1 EP 3365558A1 EP 16781725 A EP16781725 A EP 16781725A EP 3365558 A1 EP3365558 A1 EP 3365558A1
Authority
EP
European Patent Office
Prior art keywords
rotor
pump
force
generated
sequence
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
EP16781725.3A
Other languages
German (de)
English (en)
Other versions
EP3365558B1 (fr
Inventor
Wolfgang Krauth
Volker Hofacker
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3365558A1 publication Critical patent/EP3365558A1/fr
Application granted granted Critical
Publication of EP3365558B1 publication Critical patent/EP3365558B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • 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
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
    • 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/07—Electric current
    • F04C2270/075—Controlled or regulated

Definitions

  • the coupling unit couples the drive unit to the pump rotor.
  • the pump rotor is with a
  • the coupling unit is as
  • Magnetic coupling is formed, wherein the pole arrangement of the magnetic coupling is selected such that when blocking the pump rotor, the pump rotor is moved along the displacement path to the blocking of the
  • the known pump has to release a blocking additional degrees of freedom of movement, which is why the production of the pump is expensive.
  • the rotary shaking movement of the rotor is generated by alternately acting a force, or a torque in a first direction of rotation and a further force, or a further torque in a second, opposite to the first direction of rotation, to the rotor , This generation is technically easy to implement.
  • the forces, or the torques are generated by energizing the pump.
  • the forces, or the torques are generated by energizing the pump.
  • Torques generated by the energization of at least one winding An advantage is to be considered that thus an easy-to-manufacture and cost-effective implementation of a pump is possible.
  • the rotary shaking motion is generated by a pulse-width-modulated energization of the pump, or by a pulse-shaped energization with at least one pulse.
  • Electronics in particular electrical controls, preferably drive means, usually work with a
  • pauses are formed between the alternating action of the forces or of the torques.
  • no force acting on the rotor or torque are generated.
  • the breaks in particular allow cooling of the pump.
  • the shaking movement is subdivided into one or more sequences.
  • the strength of the generated forces, or the generated torques and the duration of the generation of the forces or torques are substantially the same.
  • the advantage is that the pauses within a sequence in which no force acting on the rotor or torque is generated are substantially equal in length.
  • the amount of force, or the torque and the duration of the training of the force, or the torque are varied on the rotor between the individual sequences.
  • the amount of force, or the torque and the duration of the training of the force, or the torque on the rotor from sequence to sequence are increased. Increasing increases the likelihood of blocking.
  • Torques that act on the rotor decrease from sequence to sequence.
  • the rotational movement can be effected in particular by means of a Hall sensor, in particular the detection of a Hall edge. Also, the rotational movement based on the evaluation of a course of the energization of the pump takes place.
  • Rotational movement in the breaks in particular the Rüttelpausen or the Sequence pauses are performed between the action of a force on the rotor.
  • Figure 1 is a known from the prior art schematic
  • FIG. 2 shows a first exemplary embodiment
  • FIG. 3 is an exploded view of a pump according to the invention according to FIG. 2,
  • FIG. 4 is an exemplary illustration of the process flow
  • Figure 5 shows another embodiment of a pump according to the invention.
  • FIG. 1 shows a pump 100 which is known from the prior art or from document DE 10 2010 043 391 A1.
  • the pump has a
  • Coupling unit 112 couples the pump rotor 113 and the drive unit 109.
  • the pump rotor 113 is mounted axially displaceably with a predefined displacement path d.
  • the coupling unit 112 is designed as a magnetic coupling, wherein the pole arrangement of the magnetic coupling 112 is selected such that upon blocking of the pump rotor 113, the pump rotor 113 along the displacement path to process to release the blocking of the pump rotor 113.
  • FIG. 2 shows a first exemplary embodiment of a pump 1 according to the invention.
  • a pump 1 according to the invention as
  • Coolant pump can be used in a motor vehicle.
  • the pump is preferably arranged within a coolant circuit.
  • the pump 1 comprises a pump housing 10 and a motor housing 30.
  • the pump housing 10 and the motor housing 30 are fixedly connected to each other by means of screws.
  • the pump housing 10 has a first opening 12 and a second opening 14.
  • the first opening 12 forms in particular an inlet and the second opening 14 an outlet for the fluid to be delivered, in particular the cooling liquid for cooling a combustion and / or electric motor in a means of transportation, preferably vehicle.
  • FIG. 3 shows an exploded view of a pump according to the invention according to FIG.
  • the pump 1 has a pump housing 10 and a motor housing 30. Furthermore, the pump 1 has a sump 20. The sump 20 forms together with the pump housing 10 a
  • Flow area 22 for the fluid Between the pump housing 10 and the pump pot 20, a seal 18 is formed.
  • the seal 18 prevents leakage of the fluid from the flow area 22, in particular between the pump pot 20 and the pump housing 10.
  • the seal 18 is formed in particular as an O-ring, preferably as an O-ring seal.
  • the sump 20 has in particular the shape of a pot.
  • the sump 20 has a flange 26.
  • the flange 26 is the
  • the flange 26 included a groove in which the seal 18 is disposed.
  • the flange 26 also has
  • the recesses are formed in particular as four holes in the edge region of the flange.
  • the sump 20 further includes a labyrinth 27.
  • the maze 27 prevents the ingress of contaminants, in particular sand particles in the region of the sump 20 in which the rotor is arranged.
  • the labyrinth 27 is in particular circular. It has radially inwardly extending gradations. The gradations are circular and circumferential.
  • a ring 29 is formed between the flange 26 and the labyrinth 27.
  • the ring 29 is arranged circumferentially.
  • the ring 29 separates the flange portion 26 from the labyrinth 27.
  • the pump pot 20 has an axis 24.
  • the axis 24 extends in
  • the axis 24 is fixedly connected to the pump pot 20.
  • a rotor 50 is disposed within the flow area 22.
  • the rotor 50 has a
  • the rotor 50 is rotatably supported by the axis 24. Furthermore, the rotor 50 comprises magnets 51, which allow cooperation with the stator 40. Depending on the type of pump 1, the rotor 50, at least one magnet, preferably a plurality of magnets. To promote the fluid, the rotor 50 has wings 52. The vanes 52 are formed so that the rotor 50 axially draws the fluid and presses it radially out of the pump housing 10. The suction of the fluid takes place in particular via the pump inlet 12 and the radial squeezing of the fluid takes place via the outlet 14. The wings 24 are on the pump housing 10 axially
  • the facing side of the rotor 50 is arranged. They are arranged in particular in the part of the flow-through region 22 which is formed by the pump housing 10.
  • the part of the rotor 50 that includes the magnets is disposed substantially inside the sump 20.
  • the rotor 52 is rotatably supported by a thrust washer 28 on the axis 24.
  • Thrust washer 28 simultaneously forms a plain bearing for the rotor 24.
  • Thrust washer 28 has three feet for attaching the thrust washer to the pump housing 10.
  • the axis 24 extends through a recess 28 of the thrust washer 28.
  • the rotor 50 and the labyrinth 27 prevent penetration of
  • the flange 26 of the sump 20 is used to connect the motor housing 30 with the pump pot 20.
  • the stator 40th arranged within the motor housing 30, the stator 40th arranged.
  • the stator 40 consists of two pole plates 42 with axial
  • the pole plates 42 are in
  • pole teeth 44 of the two pole plates 42 are in this case arranged nested in one another such that in the circumferential direction a uniform small distance between the individual pole teeth 44 is formed.
  • Pole or the pole plate teeth 44 are looped by at least one winding 46.
  • the pole teeth 44 and the poles of at least two opposite windings 46 are looped.
  • the return ring 48 consists of a magnetic field suffering material.
  • the return ring 48 consists of a metal sheet, which has been transformed into a circular shape.
  • a Hall sensor 32 is disposed within the motor housing 30. The accuracy of the rotor position determination is dependent on the number of magnets of the rotor 50.
  • the Hall sensor 32 is at a Vorbeidrenrenhen a magnet 51 a
  • An electronics 60 detects this Hall edge and can close on the speed of the rotor 50 based on the frequency and the distances between the detection of the Hall edges. It can also be concluded whether the rotor 50 rotates.
  • a further sealing element 34 is arranged between the flange 26 of the pump pot 20 and the motor housing 30, a further sealing element 34 is arranged.
  • the further sealing element 34 prevents ingress of fluid, in particular liquids or gases in the region of the stator 40. In this way, in particular short circuits are prevented by fluids during energization of the stator 40.
  • the motor housing 30 On the side of the motor housing 30 facing away from the pump housing 10, the motor housing 30 has an electronics area 36. Within the Electronics area 30, the electronics 60, or the control means, or the control protected by the motor housing 30 and a cover 38 is arranged.
  • the electronics 60 are used for electrical control of the pump 1.
  • the electronics 60 has in particular a first and a second output stage. Each one
  • Output stage in series with at least one winding 46 is connected.
  • the first output stage with the first winding 46 and the second output stage with the second winding 46 are connected in series.
  • the output stages are connected in parallel with each other.
  • the windings are also connected in parallel. Depending on the energization of the first or the second winding
  • the first winding 46 acts a force, or a torque on the rotor 50, in particular the magnets 51 of the rotor 50. If, for example, the first winding 46 is energized by means of the first output stage, so a rotational movement is formed in a first direction of rotation. If, however, the second winding is energized by means of the second output stage, a rotational movement of the rotor 50 in a second direction of rotation, wherein the second direction of rotation is opposite to the first direction of rotation, is formed.
  • the fluid to be pumped may have contaminants.
  • particles in the fluid between the rotor 50 and the labyrinth 27 of the sump 20 may jam and block the pump 1.
  • the contaminants can prevent a restart of the pump 1.
  • the contamination during operation of the pump 1 can lead to a standstill of the rotor 50 and thus a failure of the pump 1.
  • the solution of a blockage is carried out by a rotary shaking 82 of the rotor 50.
  • a rotary shaking movement 82 of the rotor 50 act alternately forces, or torques in a first direction of rotation and more Forces or other torques in a second, opposite to the first direction of rotation, the rotor 50.
  • Torques are generated by energizing the pump 1, in particular
  • the curve 74 shows the generation of a pulse, or the energization, or the generation of a force or a torque in a second direction of rotation.
  • the energization of the windings can be removed by the power amplifiers.
  • the second winding is energized by the second power amplifier.
  • the pump is supplied with current for a normal rotary motion. However, after a defined time, which is so chosen, it is none
  • Damage to the windings or the pump leads in particular 300 to 100 oms, preferably 500 ms, detected no rotational movement, so it can be assumed that the pump 1 is blocked. If a blockage is detected, the inventive method according to claim 1 is automatically started.
  • the method starts after a pause, which is selected so that the heated coils 46 within the stator 40 can cool sufficiently.
  • the first break lasts between 100ms and 20s, preferably one second.
  • the method starts with the generation of a force or a torque in the opposite direction to the previous start attempt.
  • the pump 1 is controlled by the electronics 60 so that shaking movements of the rotor 50 can form.
  • the shaking movement can also consist of only a single pulse, in particular Current pulse, force pulse or torque pulse, if this leads in particular to a solution of the blockage.
  • the shaking movement is limited to an alternating action of a first force in a first direction and a second force in a second direction of rotation, but no significant movement of the rotor 50 takes place in a first or second rotational direction.
  • the shaking movement is generated by alternately acting a force or the torque in a first direction of rotation and a further force, or a further torque in a second direction of rotation, wherein the first direction of rotation is opposite to the further direction of rotation.
  • Pauses 86 are formed between the alternating action of the forces or the torques. The length of the pauses 86 varies depending on the course of the
  • pauses 86 prevent a simultaneous energization of both, or all windings 56.
  • a force or a torque can be generated in the opposite direction of rotation.
  • a force, or a torque in one direction of rotation is in the
  • the shaking motion 82 is divided into one or more sequences. According to FIG. 4, the shaking movement 82 is subdivided into three sequences 84a, 84b and 84c by way of example. During a sequence, the strength of the generated forces, or the torque and the duration of the generation of the forces or torques are substantially the same. This is achieved in that the current during a sequence substantially the same amplitude and the same
  • Energization time has.
  • the energization time is 3 ms in sequence 84a and in sequence 84b the current is 5 ms
  • Pulse modulation method used wherein the force or the torque is formed during the pulse, and during the pulse break no force or no torque acts on the rotor.
  • the pulse width modulated control of the first output stage or the first winding and the second output stage or the second winding are synchronized with each other.
  • the synchronization prevents a simultaneous energization of the first and second winding.
  • the first sequence in particular 35 times a force or a torque of the first direction and in particular 35 times a force, or a torque acts in the second direction of rotation.
  • the current is applied in particular for one to 10 ms, preferably 3 ms. According to one embodiment, the number of action of the force is not set to 35.
  • a rapid shaking movement should take place.
  • the first sequence 84a is followed by the second sequence 84b.
  • the pulse length or the length of the energization or the length in which a force or a torque acts on the rotor 50 is increased.
  • the pulse length or the length of the current supply is in this case in particular 3-15 ms, preferably 5 ms.
  • the pause between the pulses is in particular 10-50 ms, preferably 20 ms.
  • the second sequence is followed by the third sequence 84c.
  • the force or the torque acts on the rotor 50 over a longer period of time than in the two sequences 84a, 84b beforehand.
  • windings are energized for 100-1000 ms, preferably 300 ms. It is thus for the period of energization, a force or torque on the rotor 50.
  • the Bestromungsimpuls which leads to the formation of a force or a
  • Torque on the rotor leads is formed a break 86.
  • the break is special between 10 and 100 ms, preferably 20ms.
  • the amount of force or torque is increased by lengthening the pulse.
  • the force or torque and the duration of the training the force or the torque on the rotor 50 varies between the individual sequences. According to Figure 4, the Bestromungsimpuls and thus the force or torque is increased from sequence to sequence.
  • the number of generated forces or torques acting on the rotor 50 will be less from sequence to sequence, while for example according to FIG. 4 in the first sequence 84A still 35 pulses per direction of rotation are generated, in the second sequence 84b only each generates 5 pulses. In the third sequence 84c, only a single pulse is generated in each case. If the first impulse already leads to a solution of the rotor, the vibrating motion 82 according to the invention consists only of a single impulse. In particular, as the number of sequences increases, the number of forces or torques generated decreases, but the duration of the effect increases.
  • the Garttelpausen 88 may be smaller, since in particular at a restart, the pump 1 is cold. With increasing jogging movement 82, however, the pump 1 is heated.
  • the windings and the final stage are heated.
  • pauses inserted.
  • the first jolting interval 88 lasts one second between the first and second jogging movements, whereas the second jogging pause already lasts 5 seconds, the 3 further pauses for 10 seconds, the five further pauses for 20 seconds and the 10 further pauses for pauses 88 2 minutes.
  • the jarring pauses 88 may vary by the above-mentioned values.
  • the process is terminated immediately as soon as a rotational movement of the rotor 50 is detected.
  • the rotational movement is detected in particular by the detection of a Hall edge of the Hall sensor 32. If a rotational movement detected so the blockage was released and the pump 1 can promote the fluid.
  • the detection of the rotational movement by means of the Hall sensor 32 a detection of the rotational movement by the evaluation of the course of the
  • the number of repetitions of the shaking motion 82 is limited to a fixed value. If, after completion of the repetitions limited to a fixed value, no rotational movement of the motor is detected, the process is aborted and no attempt is made to start the pump 1.
  • the method according to the invention can also be used with pumps which do not have a claw pole stator, in particular pumps with an EC or DC drive.
  • the stator may have more than two windings.
  • FIG. 5 shows a further embodiment of a pump 200 according to the invention.
  • the pump 200 includes a plurality of identical components or components having a similar function as the pump 1 of Figure 2 and 3.
  • the components pump housing 210, seal 218, pump well 220, motor housing 230 substantially correspond to the corresponding components in Figure 2 and 3.
  • the rotor 250 has a slightly different structure from the rotor 50.
  • the rotor 250 has a magnetized part disposed inside the pump pot 220.
  • the part of the rotor 250 carrying the magnets 251 is connected to an impeller 254 via a connecting element 253.
  • the impeller 254 has wings that promote the fluid.
  • the impeller promotes the fluid when turning.
  • the inventive method according to claim 1 can be used in a pump corresponding to the other embodiment.
  • the stator 240 has a laminated core with a plurality of radially inwardly directed stator teeth.
  • the stator teeth are each wound by at least one winding.
  • the stator teeth each have a stator head.
  • the stator head faces towards the rotor 250.
  • the stator head serves to enhance the guidance of the magnetic flux to the rotor 250.
  • the stator 240 is within the
  • a fixing member 264 presses the stator in the axial direction in the direction of a stopper, which is formed on the motor housing 230.
  • the fixing element 264 has for this purpose a plurality of spring element, which are each arranged around a guide pin. The fixation element will self-depress at the pump head flange 226.
  • the electronics 260 On the side facing away from the pump housing of the pump 1, the electronics 260 is arranged.
  • the electronics are protected by a cover 239.
  • a sealing ring 237 between the cover and the motor housing 230 prevents ingress of fluids to the electronics 260.
  • the shaking movements 82 are generated by a corresponding generation of forces or torques in a first or a second direction of rotation.
  • the generation of forces or torques by means of amplifiers in a bridge circuit, in particular the control of a B6 bridge.
  • the force or the torque in one direction of rotation is here by a
  • control takes place by means of a pulse width modulated current.
  • a pulse width modulated current is used.
  • the sump 220 of the further embodiment may also have a ring 29 and / or a labyrinth 27 corresponding to FIG.
  • the functionality and training are the same.
  • An output stage may in particular comprise MOSFETs or transistors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne un procédé pour supprimer un blocage dans une pompe, en particulier une pompe de véhicule automobile, cette pompe comportant un stator et un rotor disposé de manière à effectuer un mouvement rotatif par rapport au stator Selon l'invention, lors d'un blocage du rotor, un mouvement de secousse rotatif du rotor est généré pour supprimer le blocage.
EP16781725.3A 2015-10-22 2016-10-10 Suppression d'un blocage dans une pompe Active EP3365558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015220657.2A DE102015220657A1 (de) 2015-10-22 2015-10-22 Lösung einer Blockierung bei einer Pumpe
PCT/EP2016/074121 WO2017067800A1 (fr) 2015-10-22 2016-10-10 Suppression d'un blocage dans une pompe

Publications (2)

Publication Number Publication Date
EP3365558A1 true EP3365558A1 (fr) 2018-08-29
EP3365558B1 EP3365558B1 (fr) 2020-06-03

Family

ID=57136851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16781725.3A Active EP3365558B1 (fr) 2015-10-22 2016-10-10 Suppression d'un blocage dans une pompe

Country Status (4)

Country Link
EP (1) EP3365558B1 (fr)
CN (1) CN108431418B (fr)
DE (1) DE102015220657A1 (fr)
WO (1) WO2017067800A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018208928A1 (de) * 2018-06-06 2019-12-12 Robert Bosch Gmbh Verfahren zum Losreißen einer blockierten Wasserpumpe sowie Wassereinspritzsystem einer Brennkraftmaschine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876491A (en) * 1986-07-01 1989-10-24 Conner Peripherals, Inc. Method and apparatus for brushless DC motor speed control
DE4215266C1 (fr) * 1992-02-14 1993-04-29 Grundfos A/S, Bjerringbro, Dk
DE19539656A1 (de) * 1995-10-25 1997-04-30 Klein Schanzlin & Becker Ag Verfahren zum Anlaufen drehzahlveränderlicher elektrischer Antriebe
DE10133861B4 (de) * 2001-07-12 2007-06-06 Netzsch-Mohnopumpen Gmbh Antriebssystem für Pumpen
AU2006235862C1 (en) * 2005-11-04 2011-09-22 Fisher & Paykel Appliances Ltd Improvements Relating to Washing Machines
DE102010043391A1 (de) 2010-11-04 2012-05-10 Robert Bosch Gmbh Förderpumpe
CN203272208U (zh) * 2013-03-29 2013-11-06 大连罗斯泵业有限公司 一种无堵塞式离心泵
CN204253339U (zh) * 2014-11-11 2015-04-08 孙志恒 一种采油工作泵
CN204239279U (zh) * 2014-11-24 2015-04-01 温岭市富莱欧机电有限公司 防堵塞潜水泵

Also Published As

Publication number Publication date
CN108431418A (zh) 2018-08-21
EP3365558B1 (fr) 2020-06-03
CN108431418B (zh) 2021-05-07
WO2017067800A1 (fr) 2017-04-27
DE102015220657A1 (de) 2017-04-27

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