EP3910198B1 - Spaltrohrmotorvorrichtung - Google Patents

Spaltrohrmotorvorrichtung Download PDF

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Publication number
EP3910198B1
EP3910198B1 EP21170886.2A EP21170886A EP3910198B1 EP 3910198 B1 EP3910198 B1 EP 3910198B1 EP 21170886 A EP21170886 A EP 21170886A EP 3910198 B1 EP3910198 B1 EP 3910198B1
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EP
European Patent Office
Prior art keywords
segment
base unit
surrounding
axis
annular segment
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Active
Application number
EP21170886.2A
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English (en)
French (fr)
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EP3910198A1 (de
Inventor
Ting-Tsai Huang
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.)
Zi Yi Electrical Engineering Co Ltd
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Zi Yi Electrical Engineering Co Ltd
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Publication of EP3910198A1 publication Critical patent/EP3910198A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/0626—Details of the can
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the disclosure relates to a canned motor device capable of preventing leakage.
  • a conventional magnetically driven canned motor device disclosed in Taiwanese Patent No. 1424661 includes a front cover, a support frame, an impeller, a cup-shaped rear cover, an inner rotor, an outer rotor, a fixed shaft and a bracket.
  • the front cover has an inlet and an outlet.
  • the rear cover is a double-layered structure, and has an inner lining made of a fluoroplastic material and a reinforcing layer.
  • a further canned drive device is known from EP 1 460 272 A2 .
  • a chemical fluid is introduced into the inlet and guided by the impeller to dissipate heat generated by the inner rotor and then flows out of the outlet.
  • the diameter of the reinforcing layer is smaller than that of the inner lining.
  • an object of the invention is to provide a canned motor device that can alleviate the drawback of the prior art.
  • a canned motor device includes a base unit, a positioning seat, a motor unit, a rear cover, an impeller, a front cover, a first sealing element, and a second sealing element.
  • the base unit includes a side cover portion and a main plate portion.
  • the main plate portion surrounds an axis, is connected to the side cover portion, and has a first side surface, a second side surface, and an inner surface.
  • the first side surface has a stepped profile in a radial direction transverse to the axis, and includes an inner annular segment, an outer annular segment and a first shoulder segment.
  • the outer annular segment surrounds the inner annular segment, and is closer to the side cover portion than the inner annular segment.
  • the first shoulder interconnects the inner annular segment and the outer annular segment.
  • the second side surface is opposite to the first side surface along the axis and is disposed closer to the side cover portion than the first side surface.
  • the inner surface is disposed between the inner annular segment of the first side surface and the second side surface.
  • the motor unit is mounted in the base unit and includes a casing body, a stator, and a rotor.
  • the casing body includes a tubular main portion, and a flange portion extending radially and outwardly from one end of the tubular main portion and corresponding in position to the inner annular segment.
  • the stator is sleeved on the casing body.
  • the rotor is mounted in the tubular main portion of the casing body and is rotatable about the axis.
  • the rear cover is mounted in the base unit, and includes a main cover portion and a disk portion.
  • the main cover portion is disposed between the tubular main portion and the stator.
  • the disk portion extends radially and outwardly from one end of the main cover portion, and is clamped sealingly between the flange portion of the motor unit and the inner annular segment of the base unit.
  • the impeller is connected to and driven by the motor unit, and extends into the main plate portion of the base unit along the axis.
  • the front cover is positioned on the first side surface of the main plate portion, covers the impeller, and has an end surface.
  • the end surface abuts against the first side surface, has a stepped profile along the radial direction, and includes an inner surrounding segment, an outer surrounding segment, and a second shoulder.
  • the inner surrounding segment abuts against the inner annular segment of the base unit along the axis.
  • the outer surrounding segment surrounds the inner surrounding segment and abuts against the outer annular segment of the base unit.
  • the second shoulder interconnects the inner surrounding segment and the outer surrounding segment, and abuts against the first shoulder.
  • the disk portion and the flange portion are clamped sealingly between the inner annular segment and the inner surrounding segment.
  • the first sealing element is disposed between the main plate portion of the base unit and the disk portion to form an airtight seal between the base unit and the rear cover.
  • the second sealing element is disposed between the outer annular segment and the outer surrounding segment to form an airtight seal between the base unit and the front cover.
  • an embodiment of a canned motor device includes a base unit 10, a positioning seat 20, a motor unit 30, a rear cover 40, an impeller 50, a front cover 60, a first sealing member 71, a second sealing member 72, and a third sealing member 73.
  • the base unit 10 is made of plastic material, and can be made of an engineering plastic material that are acid and alkalis resistant such as polypropylene (PP), glass fiber reinforced polypropylene (GFRPP), polyvinylidene fluoride (PVDF), and carbon filled ethylene tetrafluoroethylene (CFRETFE).
  • the base unit 10 includes a main plate portion 11 and a side cover portion 12.
  • the main plate portion 11 surrounds an axis (L), is connected to the side cover portion 12, and has a chamfer surface 110, a first side surface 111, a second side surface 112, and an inner surface 114.
  • the first side surface 111 has a stepped profile in a radial direction transverse to the axis (L), and includes an inner annular segment 115, an outer annular segment 116, and a first shoulder 117.
  • the outer annular segment 116 surrounds the inner annular segment 115, and is closer to the side cover portion 12 than the inner annular segment 115.
  • the first shoulder 117 interconnects the inner annular segment 115 and the outer annular segment 116.
  • the second side surface 112 is opposite to the first side surface 111 along the axis (L) and is disposed closer to the side cover portion 12 than the first side surface 111.
  • the inner surface 114 is disposed between the inner annular segment 115 of the first side surface 111 and has an end connected to the second side surface 112.
  • the chamfer surface 110 is connected between the first side surface 111 and the inner surface 114.
  • the main plate portion 11 of the base seat 10 defines a first annular groove 118 formed in the inner annular segment 115 and surrounding the axis (L), and a second annular groove 119 formed in the outer annular segment 116 and surrounding the axis (L).
  • the first annular groove 118 is adjacent to the inner surface 114 of the main plate portion 11.
  • the first annular groove 118 is formed in the chamfer surface 110
  • the second annular groove 119 is adjacent to the first shoulder 117 of the main plate portion 11.
  • the positioning seat 20 is made of a metal material, is tubular, and is disposed in the side cover portion 12 of the base unit 10.
  • the motor unit 30 is mounted in the base unit 10 and the positioning seat 20 and includes a casing body 31, a stator 32, and a rotor 33.
  • the casing body 31 includes a tubular main portion 311, and a flange portion 312 extending radially and outwardly from one end of the tubular main portion 311 and corresponding in position to the inner annular segment 115.
  • the stator 32 is sleeved on the casing body 31.
  • the rotor 33 is mounted in the tubular main portion 311 of the casing body 31 and is rotatable about the axis (L).
  • the rear cover 40 is mounted in the base unit 10 and includes a main cover portion 41 and a disk portion 42.
  • the main cover portion 41 is disposed between the tubular main portion 311 and the stator 32.
  • the disk portion 42 extends radially and outwardly from one end of the main cover portion 41, and is clamped sealingly between the flange portion 312 of the motor unit 3 and the inner annular segment 115 of the base unit 10.
  • the impeller 50 is connected to and driven by the motor unit 30, and extends into the main plate portion 11 of the base unit 10 along the axis (L).
  • the front cover 60 is positioned on the first side surface 111 of the main plate portion 11, covers the impeller 50, defines a third annular groove 614, and has an end surface 61.
  • the end surface 61 abuts against the first side surface 111, has a stepped profile along the radial direction, and includes an inner surrounding segment 611, an outer surrounding segment 612, and a second shoulder 613.
  • the inner surrounding segment 611 abuts against the inner annular segment 115 of the base unit 10 along the axis (L).
  • the outer surrounding segment 612 surrounds the inner surrounding segment 611 and abuts against the outer annular segment 116 of the base unit 10.
  • the second shoulder 613 interconnects the inner surrounding segment 611 and the outer surrounding segment 612, and abuts against the first shoulder 117.
  • the disk portion 42 and the flange portion 312 are clamped sealingly between the inner annular segment 115 and the inner surrounding segment 611.
  • the flange portion 312 of the casing body 31 and the disk portion 42 of the rear cover 40 abut against the second shoulder 613.
  • the third annular groove 614 is formed in the inner surrounding segment 611 adjacent to the second shoulder 613, and surrounds the axis (L).
  • the first sealing element 71 is disposed between the main plate portion 11 of the base unit 10 and the disk portion 42 to form an airtight seal between the base unit 10 and the rear cover 40.
  • the first sealing element 71 is received within the first annular groove 118.
  • the second sealing element 72 is disposed between the outer annular segment 116 and the outer surrounding segment 611 to form an airtight seal between the base unit 10 and the front cover 60.
  • the second sealing element 72 is received within the second annular groove 119 to form an airtight seal between the base unit 10 and the front cover 60.
  • the third sealing element 73 is received within the third annular groove 614 to form an airtight seal between the flange portion 312 of the motor unit 30 and the front cover 60.
  • a chemical fluid is introduced into a space defined within the casing body 31 for dissipating heat generated by the rotor 33.
  • the chemical fluid may leak out of the space and damage the stator 32 of the motor unit 30.
  • the front cover 60 is positioned on the main plate portion 11 of the base unit 10 by a plurality of screws.
  • the disk portion 42 and the flange portion 312 are clamped sealingly between the inner annular segment 115 and the inner surrounding segment 611. Further, the disk portion 42 and the flange portion 312 abut against the second shoulder 613.
  • the disk portion 42 and the flange portion 613 are positioned stably and sealingly between the front cover 60 and the casing body 31.
  • the first sealing element 71 that is mounted between the main plate portion 11 and the disk portion 42 of the rear cover 40, and that is received within the first annular groove 118 serves as the first line of defense to prevent the chemical fluid from leaking out of the rear cover 40 and thus preventing damage to the stator 32.
  • the second sealing element 72 that is disposed between the outer annular segment 116 and the outer surrounding segment 611, and that is received within the second annular groove 119 forms an airtight seal between the first side surface 111 of the base unit 10 and outer surrounding segment 611 of the front cover 60.
  • the second sealing element 72 serves as a second line of defense.
  • the flange portion 312 of the casing body 31 and the disk portion 42 of the rear cover 40 are clamped sealingly between the inner annular segment 115 of the base unit 10 and the outer surrounding segment 611 of the front cover 60.
  • the disk portion 42 and the flange portion 313 are positioned stably and sealingly between the base unit 10 and the front cover 60.
  • the third sealing member 73 is received within the third annular groove 614 to form an airtight seal among the flange portion 312 of the motor unit 30, the front cover 60, and the base unit 10 so as to prevent the chemical fluid from leaking out.
  • the configurations of the first side surface 111 and the end surface 61 each having a stepped profile cooperate to form a plurality of turns such that, when the chemical fluid leaks out of the casing body 31, the flow speed of the chemical fluid can be reduced at each of the turns formed by the first side surface 11 and the end surface 61. In this way, a relatively good leak proof function can be provided and thus the service life of the motor unit 30 can be increased.
  • the first, second and third sealing elements 71, 72, 73 and the abovementioned structures of the canned motor device of the present invention prevent the chemical fluid from leaking out and damaging the stator 32 to thereby lengthen service life of the motor unit 3.

Claims (9)

  1. Spaltrohrmotor, umfassend:
    eine Motoreinheit (30), welche einen Gehäusekörper (31) enthält, welcher einen röhrenförmigen Hauptabschnitt (311) und einen Flanschabschnitt (312) aufweist, welcher sich von einem Ende des röhrenförmigen Hauptabschnitts (311) radial und nach außen erstreckt, einen Stator (32), welcher von dem Gehäusekörper (31) ummantelt ist, und einen Rotor (33), welcher in dem röhrenförmigen Hauptabschnitt (311) des Gehäusekörpers (31) montiert und um eine Achse (L) drehbar ist, enthält;
    eine hintere Abdeckung (40), welche in einer Basiseinheit (10) montiert ist und einen Hauptabdeckungsabschnitt (41) enthält, welcher zwischen dem röhrenförmigen Hauptabschnitt (311) und dem Stator (32) angeordnet ist;
    ein Laufrad (50), welches mit der Motoreinheit (30) verbunden ist und von dieser angetrieben wird;
    eine vordere Abdeckung (60), welche das Laufrad (50) abdeckt;
    die Basiseinheit (10), welche einen Seitenabdeckungsabschnitt (12) und einen Hauptplattenabschnitt (11) umfasst, welcher die Achse (L) umgibt, welcher mit dem Seitenabdeckungsabschnitt (12) verbunden ist, und welche enthält:
    eine erste Seitenfläche (111), welche ein abgestuftes Profil in einer radialen Richtung quer zur Achse (L) aufweist und ein inneres ringförmiges Segment (115), ein äußeres ringförmiges Segment (116), welches das innere ringförmige Segment (115) umgibt, und welches näher an dem Seitenabdeckungsabschnitt (12) liegt als das innere ringförmige Segment (115), und eine erste Schulter (117), die das innere ringförmige Segment (115) und das äußere ringförmige Segment (116) miteinander verbindet, enthält,
    eine zweite Seitenfläche (112), welche der ersten Seitenfläche (111) entlang der Achse (L) gegenüberliegt und näher an dem Seitenabdeckungsabschnitt (12) angeordnet ist als die erste Seitenfläche (111), und
    eine Innenfläche (114), welche zwischen dem inneren ringförmigen Segment (115) der ersten Seitenfläche (111) und der zweiten Seitenfläche (112) angeordnet ist;
    die Motoreinheit (30), welche in der Basiseinheit (10) montiert ist und den Gehäusekörper (31), welcher den röhrenförmigen Hauptabschnitt (311) und den Flanschabschnitt (312) aufweist, welcher sich von einem Ende des röhrenförmigen Hauptabschnitts (311) radial und nach außen entsprechend der Position von dem inneren ringförmigen Segment (115) erstreckt, wobei der Stator (32) in den Gehäusekörper (31) eingeschoben ist und der Rotor (33) in dem röhrenförmigen Hauptabschnitt (311) des Gehäusekörpers (31) montiert und um die Achse (L) drehbar ist;
    die hintere Abdeckung (40), welche ferner einen Scheibenabschnitt (42) aufweist, welcher sich von einem Ende des Hauptabdeckungsabschnitts (41) radial und nach außen erstreckt, und welcher abdichtend zwischen dem Flanschabschnitt (312) der Motoreinheit (3) und dem inneren ringförmigen Segment (115) der Basiseinheit (10) eingeklemmt ist;
    das Laufrad (50), welches sich in den Hauptplattenabschnitt (11) der Basiseinheit (10) entlang der Achse (L) erstreckt;
    die vordere Abdeckung (60), welche an der ersten Seitenfläche (111) des Hauptplattenabschnitts (11) positioniert ist, und welche eine Endfläche (61), die an der ersten Seitenfläche (111) anliegt, die ein gestuftes Profil entlang der radialen Richtung aufweist und die ein inneres umgebendes Segment (611) umfasst, welches an dem inneren ringförmigen Segment (115) der Basiseinheit (10) entlang der Achse (L) anliegt, ein äußeres umgebendes Segment (612), welches das innere umgebende Segment (611) umgibt und an dem äußeren ringförmigen Segment (116) der Basiseinheit (10) anliegt, und eine zweite Schulter (613), welche das innere umgebende Segment (611) und das äußere umgebende Segment (612) miteinander verbindet und an der ersten Schulter (117) anliegt, wobei der Scheibenabschnitt (42) und der Flanschabschnitt (312) abdichtend zwischen dem inneren ringförmigen Segment (115) und dem inneren umgebenden Segment (611) eingeklemmt sind, umfasst;
    ein erstes Dichtungselement (71), welches zwischen dem Hauptplattenabschnitt (11) der Basiseinheit (10) und dem Scheibenabschnitt (42) angeordnet ist, um eine luftdichte Abdichtung zwischen der Basiseinheit (10) und der hinteren Abdeckung (40) zu bilden; und
    ein zweites Dichtungselement (72), welches zwischen dem äußeren ringförmigen Segment (116) und dem äußeren umgebenden Segment (612) angeordnet ist, um eine luftdichte Abdichtung zwischen der Basiseinheit (10) und der vorderen Abdeckung (60) zu bilden.
  2. Spaltrohrmotor nach Anspruch 1, dadurch gekennzeichnet, dass der Hauptplattenabschnitt (11) der Basiseinheit (10) eine erste ringförmige Nut (118) definiert, welche in dem inneren ringförmigen Segment (115) ausgebildet ist und die Achse (L) umgibt, wobei das erste Dichtungselement (71) in der ersten ringförmigen Nut (118) aufgenommen ist, um eine luftdichte Abdichtung zwischen der Basiseinheit (10) und der hinteren Abdeckung (40) zu bilden.
  3. Spaltrohrmotor nach Anspruch 2, dadurch gekennzeichnet, dass die erste ringförmige Nut (118) an die Innenfläche (114) des Hauptplattenabschnitts (11) angrenzt.
  4. Spaltrohrmotor nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Hauptplattenabschnitt (11) ferner eine abgeschrägte Fläche (110) zwischen der ersten Seitenfläche (111) und der Innenfläche (114) aufweist, wobei die erste ringförmige Nut (118) in der abgeschrägten Fläche (110) ausgebildet ist.
  5. Spaltrohrmotor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Hauptplattenabschnitt (11) der Basiseinheit (10) eine zweite ringförmige Nut (119) definiert, welche in dem äußeren ringförmigen Segment (116) ausgebildet ist und die Achse (L) umgibt, wobei das zweite Dichtungselement (72) in der zweiten ringförmigen Nut (119) aufgenommen ist, um eine luftdichte Abdichtung zwischen der Basiseinheit (10) und der vorderen Abdeckung (60) zu bilden.
  6. Spaltrohrmotor nach Anspruch 5, dadurch gekennzeichnet, dass die zweite ringförmige Nut (119) neben der ersten Schulter (117) des Hauptplattenabschnitts (11) ausgebildet ist.
  7. Spaltrohrmotor nach einem der Ansprüche 1 bis 6, ferner umfassend ein drittes Dichtungselement (73), wobei die vordere Abdeckung (60) eine dritte ringförmige Nut (614) definiert, welche in dem inneren umgebenden Segment (611) ausgebildet ist und die Achse (L) umgibt, wobei das dritte Dichtungselement (73) in der dritten ringförmigen Nut (614) aufgenommen ist, um eine luftdichte Abdichtung zwischen dem Flanschabschnitt (312) der Motoreinheit (30) und der vorderen Abdeckung (60) zu bilden.
  8. Spaltrohrmotor nach Anspruch 7, dadurch gekennzeichnet, dass die dritte ringförmige Nut (614) an die zweite Schulter (613) angrenzt.
  9. Spaltrohrmotor nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Flanschabschnitt (312) des Gehäusekörpers (31) der Motoreinheit (30) und der Scheibenabschnitt (42) der hinteren Abdeckung (40) an der zweiten Schulter (613) anliegen.
EP21170886.2A 2020-05-11 2021-04-28 Spaltrohrmotorvorrichtung Active EP3910198B1 (de)

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TW109115527A TWI738327B (zh) 2020-05-11 2020-05-11 具後蓋護罩防漏強化的罐裝磁力泵

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EP3910198B1 true EP3910198B1 (de) 2022-10-12

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Publication number Priority date Publication date Assignee Title
EP4216400A1 (de) * 2022-01-25 2023-07-26 Zi Yi Electrical Engineering Co., Ltd. Spaltrohrmotorvorrichtung

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JP3877211B2 (ja) * 2003-03-20 2007-02-07 株式会社イワキ マグネットポンプにおけるリアケーシングの製造方法
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TW202143602A (zh) 2021-11-16
EP3910198A1 (de) 2021-11-17

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