WO2018033273A1 - Groupe de refoulement - Google Patents

Groupe de refoulement Download PDF

Info

Publication number
WO2018033273A1
WO2018033273A1 PCT/EP2017/064621 EP2017064621W WO2018033273A1 WO 2018033273 A1 WO2018033273 A1 WO 2018033273A1 EP 2017064621 W EP2017064621 W EP 2017064621W WO 2018033273 A1 WO2018033273 A1 WO 2018033273A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive shaft
rotor
bearing sleeve
pump stator
pump
Prior art date
Application number
PCT/EP2017/064621
Other languages
German (de)
English (en)
Inventor
Chen Zhou
Guido Bernd Finnah
David Paul THIBAULT
Martin Hiller
Dieter Amesoeder
Thomas Frahammer
Marian Kacmar
Dominik ROCKER
Raed Hamada
Thorsten Stoeberl
Yihao Zhu
Joerg Engelhardt
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
Priority to EP17731127.1A priority Critical patent/EP3500732B1/fr
Priority to CN201780050434.4A priority patent/CN109563739B/zh
Priority to KR1020197007317A priority patent/KR20190034673A/ko
Publication of WO2018033273A1 publication Critical patent/WO2018033273A1/fr

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
    • F04C3/00—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type
    • F04C3/06—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type the axes being arranged otherwise than at an angle of 90 degrees
    • F04C3/08—Rotary-piston machines or pumps, with non-parallel axes of movement of co-operating members, e.g. of screw type the axes being arranged otherwise than at an angle of 90 degrees of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/008—Enclosed motor pump units
    • 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
    • F04C2240/50—Bearings
    • F04C2240/56—Bearing bushings or details thereof
    • 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
    • F04C2240/60—Shafts
    • F04C2240/605—Shaft sleeves or details thereof

Definitions

  • the invention relates to a delivery unit of the type of
  • the rotor has on its side facing away from the drive shaft end face a toothing, with a on the
  • Pump stator trained teeth meshes. Between the teeth of the rotor and the toothing of the pump stator working spaces for conveying pumped media are formed.
  • the drive shaft, the rotor and the pump stator are individual pump components that have to fulfill certain characteristics such as delivery rate, efficiency and pressure build-up within certain tolerances. Whether the pump components can jointly fulfill these required properties can only be tested in a functional test on the finished product, ie after complete assembly of the delivery unit.
  • Main claim has the advantage that the drive shaft, the rotor and the pump stator form a pump unit that can be tested by itself already on the fulfillment of the necessary properties.
  • a drive of a test stand is used to drive the pump unit.
  • the pump unit is achieved by the drive shaft is arranged in a bearing sleeve having a projecting in the radial direction with respect to the drive axis shoulder at which the pump stator is held by means of at least one holding means. If the pump unit does not fulfill the required properties in the functional test, the pump unit is reworked in a post-processing step. This repair can be done immediately after the assembly of the pump unit and not only after the assembly of pump unit and drive, so not only after completion of the entire delivery unit. This will be the
  • the at least one holding means a positive and / or non-positive connection between the shoulder of the bearing sleeve and the
  • the at least one retaining means is formed by a deformed annular collar, which is provided on the shoulder of the bearing sleeve and engages behind the pump stator.
  • the at least one holding means is formed by a retaining ring, which is arranged on the side facing away from the rotor of the pump stator and engages behind the shoulder of the bearing sleeve with latching means.
  • the pump stator of a housing of the pump stator of a housing of the
  • Delivery units are pressed against the shoulder of the bearing sleeve.
  • the bearing sleeve is attached to the pump stator, that the bearing sleeve is arranged concentrically to the drive axis of the drive shaft. In this way, an alignment or centering of the components of
  • Components can be reduced and thereby the wear and the resulting by the internal leakage reduction of the pump efficiency can be minimized.
  • At least one sealing means is provided which seals a gap between the bearing sleeve and the drive shaft. In this way, the in the form of returning medium to the suction of the delivery unit occurring internal losses between high pressure side and low pressure side decreases and increases the pump efficiency. Furthermore, it is advantageous if the bearing sleeve with three stages sections
  • Step sections in each case a sliding bearing and at the middle step portion, the at least one sealing means is provided.
  • the running surface for the sealant can be produced particularly inexpensively.
  • the bearing sleeve is made conical, as this simplifies the deep drawing of the bearing sleeve.
  • the bearing sleeve is made conical, as this simplifies the deep drawing of the bearing sleeve.
  • bearing sleeve made of a stainless steel and the drive shaft, the rotor and the pump stator of a plastic, in particular a thermosetting plastic, are made. This material selection makes the delivery unit suitable for pumping aqueous urea solutions.
  • Magnet armature is coupled, which surrounds the drive shaft annular and is rotatably mounted on the bearing sleeve.
  • the bearing sleeve provides in this way
  • the stator can adapt better to the rotor, so that gaps between the teeth of rotor and pump stator are reduced. It is also advantageous if the drive shaft faces one of the bearing sleeve
  • Fig.l shows a sectional view of a delivery unit with a
  • FIG. 2 is an exploded view of the delivery unit according to Fig.l,
  • FIG. 5 is an exploded view of the pump unit according to Fig.4 and
  • FIG. 6 shows a pump unit according to a third embodiment.
  • FIG. 1 shows a sectional view of a delivery unit with a pump unit according to the invention according to a first exemplary embodiment.
  • the delivery unit according to the invention serves to convey fluid media.
  • the delivery unit 1 comprises a drive shaft 2 and a driven by the drive shaft 2, in a pump stator 3 rotatably mounted rotor 4. Die
  • Drive shaft 2, the pump stator 3 and the rotor 4 are made for example of a plastic, in particular a thermosetting plastic.
  • the drive shaft 2 has a cooperating with the rotor 4 inclined sliding plane 5, which can tumble the rotor 4 with its rotor axis 6 about a drive shaft 7 of the drive shaft 2.
  • the inclined sliding plane 5 is provided for example on an end face of a shoulder portion 10 of the drive shaft 2.
  • the rotor 4 has on its end facing away from the drive shaft 2 a toothing 11 which meshes with a formed on the pump stator 3 teeth 12, wherein between the teeth 11 of the rotor 4 and the teeth 12 of the pump stator 3 working spaces for conveying the pumped medium are formed.
  • the pump stator 3 can be made of a single material or, alternatively, a top layer facing the rotor 4 and a rotor 4 facing away from the rotor
  • Carrier layer is made of a thermoplastic.
  • magnets 14 are provided by means of which the drive shaft 2 in
  • the stator 16 is designed, for example, as a laminated stator core.
  • the magnets 14 are rotatably mounted on a drive shaft 7 about the
  • Magnet armature 17 is provided, which surrounds the drive shaft 2 annular and is mechanically connected to the drive shaft 2.
  • the armature 17 is positively connected, according to the embodiment via a toothing 18,19, with the armature 17.
  • the magnet armature 17 has a passage opening 22 for receiving a portion of the drive shaft 2.
  • the toothing 18 is formed, which interacts mechanically with the toothing 19 of the drive shaft 2.
  • the teeth 18,19 is formed as a straight toothing, for example as involute or circular arc.
  • the magnet armature 17 has a magnetic carrier 20 holding the magnets 14, which is made of plastic and the magnets 14 in the radial direction on the drive shaft 2 facing the inside, in the circumferential direction between the magnets 14 and in the axial direction on the end faces encloses.
  • the hohzylindrförmige magnet armature 17 is surrounded by the stator 16 and arranged in a first, for example cup-shaped housing portion 23.
  • the stator 16 is provided, for example, on the outer circumference of the first housing portion 23.
  • a bearing sleeve 24 is provided, which extends into the passage opening 22 of the armature 17 and in which the drive shaft 2 is rotatably mounted.
  • the bearing sleeve 24 is for example cylindrical and / or sheet-shaped. Accordingly, the portion of the drive shaft 2, which is mounted in the bearing sleeve 24, also formed cylindrical.
  • the the Bearing sleeve 24 is slightly conical and the corresponding portion of the drive shaft 2 with the same angle also be made conical.
  • the bearing sleeve 24 is made of a sheet, which consists for example of stainless steel.
  • the drive shaft 2 is in the axial direction with respect to the drive shaft 7 with the shoulder portion 10 of the bearing sleeve 24 out.
  • the drive shaft 2 may be made of a single material or, alternatively, a top layer facing the bearing sleeve 24 and a carrier layer facing away from the bearing sleeve 24, wherein the top layer is made of a thermosetting plastic and the carrier layer is made of a thermoplastic.
  • a bearing ring 25 is attached to an end face of the armature 17, which has a sleeve portion 28 and a projecting in the radial direction with respect to the drive shaft 7 disc portion 29.
  • the sleeve portion 28 of the bearing ring 25 is rotatably mounted on the bearing sleeve 24.
  • the disk portion 29 of the bearing ring 25 forms with an applied to the housing portion 23 supporting disk 30 an axial sliding bearing.
  • the support disk 30 is
  • the bearing ring 25 made of high temperature resistant thermoplastic material, especially PEEK.
  • the drive shaft 2, the pump stator 3, the rotor 4 and the bearing sleeve 24 form a pump unit 26.
  • the bearing sleeve 24 at its end facing the rotor 4 has a shoulder 31 which is annular disk-shaped in the radial direction with respect to the drive axis 7 protrudes and on which the pump stator 3 is held by means of at least one holding means 27.
  • the at least one holding means 27 is a positive and / or non-positive
  • Connection between the shoulder 31 of the bearing sleeve 24 and the pump stator 3 ago for example, a latching, clamping, pressing or screw connection.
  • the at least one retaining means 27 is formed by a deformed annular collar 46, which is provided on the shoulder 31 of the bearing sleeve 24 and engages behind the pump stator 3. Through the shoulder 31 and the annular collar 46 of the bearing sleeve 24, a receiving portion 32 for receiving the pump stator 3 is formed.
  • the bearing sleeve 24 is so on
  • the pump stator 3 attached that the bearing sleeve 24 concentric with the drive axis. 7 the drive shaft 2 is arranged.
  • the pump stator 3 and the receiving portion 32 of the bearing sleeve 24 enclose a space in which the shoulder portion 10 of the drive shaft 2 and the rotor 4 are arranged.
  • the shoulder 31 of the bearing sleeve 24 abuts against the support plate 30.
  • a second, for example, ceiling-shaped housing portion 34 is provided, which closes the first housing portion 23, the support plate 30 with at least one holding portion 36 against a shoulder 35 of the first
  • the second housing portion 34 includes, together with the support plate 30 and the receiving portion 32 of the bearing sleeve 24 an annular space 37, in which an example, annular sealing element 38 is arranged.
  • a channel 40 is formed in which a spring 41 is provided, which is biased at its one end by a projecting into the channel 40 bearing pin 42 and presses the drive shaft 2 against the rotor 4 at its other end.
  • the bearing pin 42 is fastened, for example, to a bottom 43 of the cup-shaped first housing section 23. Between the spring, for example, a
  • Coil spring is, and the bearing pin 42 may be provided a ball 44 which rotates with the spring 41 and the drive shaft 2 and is a low-wear connection to the bearing pin 42.
  • the channel 40 is, for example, a through-passage extending in the axial direction, which extends from an end face facing away from the rotor 4 to the front side facing the rotor 4 with the oblique sliding plane 5 and fluid to the suction side
  • FIG. 2 shows an exploded view of the delivery unit according to Fig.l.
  • FIG 3 shows the pump unit according to the first embodiment.
  • 4 shows a pump unit according to the second embodiment.
  • the at least one retaining means 27 is formed as a separate retaining ring 47, which is arranged on the side facing away from the rotor 4 of the Pumpenstators 3 and the shoulder 31 of the bearing sleeve 24 with locking means 48, for example, resilient locking arms behind engages.
  • the retaining ring 47 is made of stainless steel, for example. 5 shows an exploded view of the pump unit according to Fig.4.
  • FIG. 6 shows a pump unit according to a third embodiment.
  • At least one sealing means 50 is provided at a gap 51 between the bearing sleeve 24 and the drive shaft 2, which seals the gap 51.
  • the bearing sleeve 24 has, for example, four step sections 24.1, each with a different diameter. At the two outer step portions 24.1 of the bearing sleeve 24, a sliding bearing is formed in each case. Seen in the axial direction between these plain bearings, the at least one sealing means 50 is provided on the drive shaft 2 in a groove 53.
  • the sealing means 50 comprises, for example, a PTFE sealing ring, which cooperates in the groove 53 with an EPDM O-ring.
  • a shim may be provided to determine the gap between the drive shaft 2 and the bearing sleeve 24. This gap size is important to produce a hydrodynamic sliding film on the rotating drive shaft 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

On connaît déjà des groupes de refoulement comprenant un arbre d'entraînement et un rotor entraîné par l'arbre d'entraînement et disposé de manière rotative dans un stator de pompe. L'arbre d'entraînement comprend un plan de glissement incliné coopérant avec le rotor, lequel plan de glissement permet à l'axe de rotation du rotor d'effectuer une nutation autour d'un axe d'entraînement de l'arbre d'entraînement. Le rotor comprend, sur sa face frontale opposée à l'arbre d'entraînement, une denture qui s'engrène avec une denture formée sur le stator de pompe. Des chambres de travail servant au refoulement de milieux à refouler sont formées entre la denture du rotor et la denture du stator de pompe. L'arbre d'entraînement, le rotor et le stator de pompe sont des composants de pompe individuels qui, par leur coopération les uns avec les autres, doivent présenter des caractéristiques déterminées telles que le débit de refoulement, le rendement et la montée en pression dans des tolérances déterminées. Il est possible de tester, grâce à un test de fonctionnement, si les composants de pompe peuvent présenter conjointement ces caractéristiques requises, et ceci d'abord sur le produit fini, c'est-à-dire après l'assemblage complet du groupe de refoulement. Les coûts de fabrication du groupe de refoulement selon l'invention sont réduits. Selon l'invention, l'arbre d'entraînement (2) est disposé dans une douille de palier (24) qui comprend un épaulement (31) faisant saillie dans la direction radiale par rapport à l'axe d'entraînement (7), épaulement sur lequel le stator de pompe (3) est retenu au moyen d'au moins un moyen de retenue (27).
PCT/EP2017/064621 2016-08-18 2017-06-14 Groupe de refoulement WO2018033273A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17731127.1A EP3500732B1 (fr) 2016-08-18 2017-06-14 Unité de refoulement
CN201780050434.4A CN109563739B (zh) 2016-08-18 2017-06-14 输送器总成
KR1020197007317A KR20190034673A (ko) 2016-08-18 2017-06-14 펌프 어셈블리

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016215474.5 2016-08-18
DE102016215474.5A DE102016215474A1 (de) 2016-08-18 2016-08-18 Förderaggregat

Publications (1)

Publication Number Publication Date
WO2018033273A1 true WO2018033273A1 (fr) 2018-02-22

Family

ID=59078058

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/064621 WO2018033273A1 (fr) 2016-08-18 2017-06-14 Groupe de refoulement

Country Status (5)

Country Link
EP (1) EP3500732B1 (fr)
KR (1) KR20190034673A (fr)
CN (1) CN109563739B (fr)
DE (1) DE102016215474A1 (fr)
WO (1) WO2018033273A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020124825A1 (de) 2020-09-23 2022-03-24 Kolektor Group D.O.O. Motor-Pumpe-Einheit
DE102021103306A1 (de) 2021-02-12 2022-08-18 Kolektor Group D.O.O. Handgeführtes Druckflüssigkeitsgerät

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209140A1 (de) 2013-05-23 2014-11-27 Robert Bosch Gmbh Förderaggregat

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687578A (en) * 1970-09-04 1972-08-29 Trw Inc Hydraulic pump motor
US5708311A (en) * 1996-07-17 1998-01-13 Vickers, Inc. Integrated electric motor driven in line hydraulic pump
DE29709007U1 (de) * 1997-05-22 1997-07-24 Lieu Chen Ta Magnetisch kuppelbare Pumpe
DK1171944T3 (da) * 1999-04-20 2004-04-13 Forschungszentrum Juelich Gmbh Rotorindretning
DE102010064190A1 (de) * 2010-12-27 2012-06-28 Robert Bosch Gmbh Elektrische Maschine mit verbesserten Wärmemanagement
DE102011015110B3 (de) * 2011-03-19 2012-01-26 Ebm-Papst St. Georgen Gmbh & Co. Kg Dosiersystem

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209140A1 (de) 2013-05-23 2014-11-27 Robert Bosch Gmbh Förderaggregat

Also Published As

Publication number Publication date
EP3500732A1 (fr) 2019-06-26
CN109563739A (zh) 2019-04-02
KR20190034673A (ko) 2019-04-02
EP3500732B1 (fr) 2020-04-15
DE102016215474A1 (de) 2018-02-22
CN109563739B (zh) 2021-04-30

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