EP4008908A1 - Pompe à rotor noyé avec capteur de fuite - Google Patents

Pompe à rotor noyé avec capteur de fuite Download PDF

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Publication number
EP4008908A1
EP4008908A1 EP21180838.1A EP21180838A EP4008908A1 EP 4008908 A1 EP4008908 A1 EP 4008908A1 EP 21180838 A EP21180838 A EP 21180838A EP 4008908 A1 EP4008908 A1 EP 4008908A1
Authority
EP
European Patent Office
Prior art keywords
end wall
case body
axis
section
wall
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.)
Pending
Application number
EP21180838.1A
Other languages
German (de)
English (en)
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
Original Assignee
Zi Yi Electrical Engineering Co Ltd
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
Priority claimed from TW109142382A external-priority patent/TWI746299B/zh
Priority claimed from TW110109996A external-priority patent/TWI753802B/zh
Application filed by Zi Yi Electrical Engineering Co Ltd filed Critical Zi Yi Electrical Engineering Co Ltd
Publication of EP4008908A1 publication Critical patent/EP4008908A1/fr
Pending legal-status Critical Current

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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
    • 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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0245—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • F04D15/0263—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump the condition being temperature, ingress of humidity or leakage
    • 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 pump, and more particularly to a magnetic drive pump.
  • a conventional magnetic drive pump 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 stationary shaft and a handling frame.
  • the rear cover has a double-layered structure, and includes an inner lining made of a fluoroplastic material, and a reinforced layer.
  • the inner lining and the reinforced layer abut against one another to form the double-layered structure of the rear cover.
  • chemical liquid may leak through a crack in the inner lining into the gap between the inner lining and the reinforced layer.
  • the leakage through the inner lining cannot be detected by the conventional magnetic pump, which may allow the chemical liquid to leak further into the outer rotor and corrode the outer rotor. As a result, the magnetic drive pump could malfunction.
  • an object of the disclosure is to provide a magnetic drive pump that can alleviate the drawback of the prior art.
  • the magnetic drive pump includes a seat unit, a motor unit and a leak detector.
  • the seat unit includes a fixed seat, a surrounding seat and a seat base.
  • the fixed seat surrounds an axis.
  • the surrounding seat is sleeved on the fixed seat.
  • the seat base is where the surrounding seat is disposed on.
  • the motor unit includes a rotor, an inner case body, an outer case body and a stator.
  • the rotor is rotatable about the axis.
  • the inner case body surrounds the rotor.
  • the outer case body is sleeved on the inner case body.
  • the stator surrounds the outer case body and is surrounded by the fixed seat about the axis.
  • the inner case body has an inner surrounding wall and an inner end wall.
  • the inner surrounding wall surrounds the rotor and has two inner opposite ends spaced apart from each other in the direction of the axis.
  • the inner end wall is connected to one of the inner opposite ends.
  • the inner surrounding wall and the inner end wall cooperatively define a disposing space that opens at the other one of the inner opposite ends and that is where the rotor is disposed within.
  • the outer case body has an outer surrounding wall and an outer end wall.
  • the outer surrounding wall is sleeved on the inner surrounding wall, is surrounded by the stator and has two outer opposite ends that are spaced apart from each other in the direction of the axis.
  • the outer end wall is connected to one of the outer opposite ends and is located at one side of the inner end wall opposite to the disposing space.
  • the outer end wall cooperates with the inner end wall to define a liquid-receiving space therebetween.
  • the leak detector is disposed on one side of the outer end wall that is opposite to the liquid-receiving space, and includes a sensor that is for detecting a change in electrostatic capacity between the liquid-receiving space and the sensor.
  • an embodiment of a magnetic drive pump 1 includes a seat unit 2, a motor unit 3, a leak detector 4 and a cover 5.
  • the seat unit 2 includes a fixed seat 21, a surrounding seat 22 and a seat base 23.
  • the fixed seat 21 surrounds an axis (L).
  • the surrounding seat 22 is sleeved on the fixed seat 21.
  • the seat base 23 is where the surrounding seat 22 is disposed on.
  • the motor unit 3 is disposed in the seat unit 2, and includes a rotor 31, an inner case body 32, an outer case body 33 and a stator 34.
  • the rotor 31 is rotatable about the axis (L).
  • the inner case body 32 surrounds the rotor 31.
  • the outer case body 33 is sleeved on the inner case body 32.
  • the stator 34 surrounds the outer case body 33 and is surrounded by the fixed seat 21 of the seat unit 2 about the axis (L).
  • the inner case body 32 of the motor unit 3 has an inner surrounding wall 321 and an inner end wall 322.
  • the inner surrounding wall 321 surrounds the rotor 31 of the motor unit 3 and has two inner opposite ends spaced apart from each other in the direction of the axis (L).
  • the inner end wall 322 is connected to one of the inner opposite ends of the inner surrounding wall 321.
  • the inner surrounding wall 321 and the inner end wall 322 cooperatively define a disposing space 323 that opens at the other one of the inner opposite ends and that is where the rotor 31 is disposed within.
  • the inner end wall 322 has an inner annular section 324, an inner end section 325 and an inner connecting section 326.
  • the inner annular section 324 is annular, is connected to the inner surrounding wall 321 of the inner case body 32 and extends radially and inwardly from the one of the inner opposite ends of the inner surrounding wall 321 toward the axis (L).
  • the inner end section 325 is spaced apart from the inner annular section 324 in the direction of the axis (L).
  • the inner connecting section 326 surrounds the axis (L) and interconnects an inner edge of the inner annular section 324 that is approximate to the axis (L) with the inner end section 325 in the direction of the axis (L).
  • the outer case body 33 of the motor unit 3 has an outer surrounding wall 331 and an outer end wall 332.
  • the outer surrounding wall 331 is sleeved on the inner surrounding wall 321 of the inner case body 32, is surrounded by the stator 34 of the motor unit 3 and has two outer opposite ends that are spaced apart from each other in the direction of the axis (L).
  • the outer end wall 332 is connected to one of the outer opposite ends and is located at one side of the inner end wall 322 opposite to the disposing space 323.
  • the outer end wall 332 has an outer annular section 334, an outer end section 335, an outer connecting section 336, and a protruding wall section 333 that is proximate to the seat base 23 of the seat unit 2.
  • the outer annular section 334 is connected to the outer surrounding wall 331.
  • the outer end section 335 is spaced apart from the outer annular section 334 in the direction of the axis (L).
  • the outer connecting section 336 surrounds the axis (L) and interconnects an inner edge of the outer annular section 334 that is approximate to the axis (L) with the outer end section 335 in the direction of the axis (L) .
  • the protruding wall section 333 protrudes from the outer annular section 334 and away from the inner annular section 324 of the inner end wall 322 of the inner case body 32, and is connected to the outer connecting section 336.
  • the protruding wall section 333 cooperates with the inner annular section 324 and the inner connecting section 326 of the inner end wall 322 to define a liquid-receiving space 337.
  • the liquid-receiving space 337 is located below the axis (L), and the volume thereof ranges from 2 to 5 cubic centimeters.
  • the outer case body 33 further has an annular groove 338 and a plurality of guiding grooves 339.
  • the annular groove 338 is formed in the outer annular section 334 and surrounds the axis (L).
  • Each of the guiding grooves 339 extends from the outer surrounding wall 331 to the outer end wall 332, and has an axial groove part 339' formed in the outer surrounding wall 331, and a radial groove part 339" formed in the outer annular section 334 and communicating with the axial groove part 339'.
  • the guiding grooves 339 are disposed about the axis (L) and are spaced apart from each other.
  • the annular groove 338 and each of the guiding grooves 339 intersect.
  • the annular groove 338 and the guiding grooves 339 are adjacent to the inner case body 32.
  • the annular groove 338 communicates with the liquid-receiving space 337 and each of the guiding grooves 339.
  • the leak detector 4 is disposed on one side of the protruding wall section 333 of the outer end wall 332 that is opposite to the liquid-receiving space 337, and includes a sensor 41.
  • the sensor 41 is for detecting a change in electrostatic capacity between the liquid-receiving space 337 and the sensor 41.
  • the sensor 41 is a capacitive proximity sensor that can be short-circuited or open-circuited when detecting a certain level of electrostatic capacity.
  • the cover 5 abuts against the outer end wall 332 of the outer case body 33 of the motor unit 3 and is bolted to the fixed seat 21 of the seat unit 2 such that the leak detector 4 is located between the protruding wall section 333 of the outer end wall 332 and the cover 5.
  • the sensor 41 continuously detects a leakage according to a change in electrostatic capacity between the liquid-receiving space 337 and the sensor 41. If the inner case body 32 of the motor unit 3 is damaged by being in frequent contact with chemical liquid over a long period of time, the chemical liquid may leak through a crack in the inner case body 32. However, the leaked chemical liquid between the inner case body 32 and the outer case body 33 will be directed by the axial groove part 339' and the radial groove part 339" of each of the guiding grooves 339 to flow into the annular groove 338 and then into the liquid-receiving space 337.
  • the stator 34 of the motor unit 3 can be prevented from being immediately exposed to the leaked chemical liquid. Moreover, the presence of the chemical liquid in the liquid-receiving space 337 causes a change in electrostatic capacity between the liquid-receiving space 337 and the sensor 41, and this change can be detected by the sensor 41. As soon as the sensor 41 detects the change, a control member (not shown) that is electronically connected to the sensor 41 is able to alert a user about the leakage or to cease the operation of the motor unit 3. Thus, the stator 34 is prevented from being corroded by the chemical liquid, and the motor unit 3 will not malfunction.
  • the liquid-receiving space 337 being defined by the protruding wall section 333, the inner annular section 324 and the inner connecting section 326 of the motor unit 3 and being capable of collecting leaked chemical liquid between the inner case body 32 and the outer case body 33 of the motor unit 3, and by virtue of the sensor 41 being capable of detecting a change in electrostatic capacity between the liquid-receiving space 337 and the sensor 41, the magnetic drive pump 1 can be prevented from malfunctioning. Therefore, the purpose of the disclosure is certainly fulfilled.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP21180838.1A 2020-12-02 2021-06-22 Pompe à rotor noyé avec capteur de fuite Pending EP4008908A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW109142382A TWI746299B (zh) 2020-12-02 2020-12-02 具測漏功能的永磁泵
TW110109996A TWI753802B (zh) 2021-03-19 2021-03-19 具後蓋護罩防漏強化之罐裝磁力泵

Publications (1)

Publication Number Publication Date
EP4008908A1 true EP4008908A1 (fr) 2022-06-08

Family

ID=76553596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21180838.1A Pending EP4008908A1 (fr) 2020-12-02 2021-06-22 Pompe à rotor noyé avec capteur de fuite

Country Status (1)

Country Link
EP (1) EP4008908A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998863A (en) * 1987-04-11 1991-03-12 Franz Klaus Union Armaturen Pumpen Gmbh & Co. Magnetic pump drive
EP2292932A2 (fr) * 2009-07-15 2011-03-09 KSB Aktiengesellschaft Pot d'écartement
US20110293450A1 (en) * 2010-06-01 2011-12-01 Micropump, Inc. Pump magnet housing with integrated sensor element
TWI424661B (fr) 2011-11-03 2014-01-21
TWM600801U (zh) * 2020-03-31 2020-09-01 日益電機股份有限公司 具測漏功能的罐裝磁力泵
CN212055146U (zh) * 2020-04-13 2020-12-01 日益电机股份有限公司 具有防水接线盒的罐装磁力泵

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998863A (en) * 1987-04-11 1991-03-12 Franz Klaus Union Armaturen Pumpen Gmbh & Co. Magnetic pump drive
EP2292932A2 (fr) * 2009-07-15 2011-03-09 KSB Aktiengesellschaft Pot d'écartement
US20110293450A1 (en) * 2010-06-01 2011-12-01 Micropump, Inc. Pump magnet housing with integrated sensor element
TWI424661B (fr) 2011-11-03 2014-01-21
TWM600801U (zh) * 2020-03-31 2020-09-01 日益電機股份有限公司 具測漏功能的罐裝磁力泵
CN212055146U (zh) * 2020-04-13 2020-12-01 日益电机股份有限公司 具有防水接线盒的罐装磁力泵

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