WO2022175828A1 - Control of liquid ring pump - Google Patents

Control of liquid ring pump Download PDF

Info

Publication number
WO2022175828A1
WO2022175828A1 PCT/IB2022/051366 IB2022051366W WO2022175828A1 WO 2022175828 A1 WO2022175828 A1 WO 2022175828A1 IB 2022051366 W IB2022051366 W IB 2022051366W WO 2022175828 A1 WO2022175828 A1 WO 2022175828A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
function
controller
liquid ring
ring pump
Prior art date
Application number
PCT/IB2022/051366
Other languages
English (en)
French (fr)
Inventor
Xin DAI
Xibo Liu
Andries Daniel Jozef De Bock
Original Assignee
Edwards Technologies Vacuum Engineering (Qingdao) Company Limited
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 Edwards Technologies Vacuum Engineering (Qingdao) Company Limited filed Critical Edwards Technologies Vacuum Engineering (Qingdao) Company Limited
Priority to EP22706412.8A priority Critical patent/EP4295048A1/de
Priority to JP2023550243A priority patent/JP2024507235A/ja
Priority to CN202280016454.0A priority patent/CN116981847A/zh
Priority to US18/547,079 priority patent/US20240133380A1/en
Publication of WO2022175828A1 publication Critical patent/WO2022175828A1/en

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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • 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
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; 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
    • F04C2270/05—Speed
    • F04C2270/052—Speed angular
    • F04C2270/0525—Controlled or regulated
    • 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
    • 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
    • F04C2270/78—Warnings
    • F04C2270/782—Sound
    • 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
    • F04C2270/78—Warnings
    • F04C2270/784—Light
    • 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
    • F04C2270/80—Diagnostics

Definitions

  • Figure 1 is a schematic illustration (not to scale) showing a vacuum system
  • a gas inlet of the liquid ring pump 10 is connected to the suction line 28.
  • a gas outlet of the liquid ring pump 10 is connected to an exhaust line or pipe 30.
  • the liquid ring pump 10 is coupled to the pump system 16 via a first operating liquid pipe 32.
  • the liquid ring pump 10 is configured to receive the operating liquid from the pump system 16 via the first operating liquid pipe 32.
  • the liquid ring pump 10 is driven by the motor 12.
  • the separator 14 comprises an operating liquid outlet via which the operating fluid separated from the received exhaust fluid is output from the separator 14, and the vacuum system 2, via a drain or evacuation pipe 36.
  • the controller 20 determines or measures the electrical current in the motor 12, i.e. within wiring of the motor 12 such as electrical current in a stator winding of the motor 12.
  • the VFD 42 determines or measures the electrical current in the motor 12.
  • the VFD 42 converts input power from the motor 12 from AC to DC and then back to AC to achieve a desired frequency.
  • the output electrical current is determined or measured during this conversion process.
  • the measured value of the electrical current may be stored in a register of the integrated circuit board of the VSD 42.
  • the controller 20 determines or measures the speed of the motor 12.
  • the VFD 42 determines or measures the speed of the motor 12. More specifically, the VFD determines a frequency of the output power that is supplied to the motor 12. The speed of the motor 12 is determined using the frequency of the output power that is supplied to the motor 12 by the VFD 42. In particular, in this embodiment, the speed of the motor 12 is determined to be: where: PN is the speed of the motor 12; f is the frequency of the output power; and
  • the controller 20 compares the determined function value F against a threshold value.
  • the first threshold value may be any appropriate value.
  • the threshold value is greater than 0.015.
  • the threshold value may be in the range 0.015-0.030, or more preferably 0.015-0.025, or more preferably about 0.020.
  • the controller 20 determines that the liquid ring pump 10 is operating in a dry-run condition, i.e. that there is insufficient operating liquid in the liquid ring pump 10. Accordingly, at step s12, the controller 20 controls the alert module 22 to output an alert.
  • step s16 the process of Figure 3 ends with the liquid ring pump 10 being shutdown.
  • the process of Figure 3 may be subsequently restarted with start-up of the liquid ring pump 10 at step s2.
  • the operating liquid is water.
  • the operating liquid is a different type of operating liquid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
PCT/IB2022/051366 2021-02-22 2022-02-16 Control of liquid ring pump WO2022175828A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22706412.8A EP4295048A1 (de) 2021-02-22 2022-02-16 Steuerung einer flüssigkeitsringpumpe
JP2023550243A JP2024507235A (ja) 2021-02-22 2022-02-16 液体リングポンプの制御
CN202280016454.0A CN116981847A (zh) 2021-02-22 2022-02-16 液环泵的控制
US18/547,079 US20240133380A1 (en) 2021-02-22 2022-02-16 Control of liquid ring pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2021/077155 2021-02-22
CN2021077155 2021-02-22

Publications (1)

Publication Number Publication Date
WO2022175828A1 true WO2022175828A1 (en) 2022-08-25

Family

ID=80461893

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2022/051366 WO2022175828A1 (en) 2021-02-22 2022-02-16 Control of liquid ring pump

Country Status (2)

Country Link
EP (1) EP4295048A1 (de)
WO (1) WO2022175828A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06249161A (ja) * 1993-02-26 1994-09-06 Suzuki Motor Corp 冷却水ポンプ故障検出装置及びこれに使用される冷却水ポンプ
US7117120B2 (en) * 2002-09-27 2006-10-03 Unico, Inc. Control system for centrifugal pumps
JP2016056738A (ja) * 2014-09-10 2016-04-21 有限会社K&G 真空ポンプシステム及びそれを用いた湿式真空スプリンクラーシステム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06249161A (ja) * 1993-02-26 1994-09-06 Suzuki Motor Corp 冷却水ポンプ故障検出装置及びこれに使用される冷却水ポンプ
US7117120B2 (en) * 2002-09-27 2006-10-03 Unico, Inc. Control system for centrifugal pumps
JP2016056738A (ja) * 2014-09-10 2016-04-21 有限会社K&G 真空ポンプシステム及びそれを用いた湿式真空スプリンクラーシステム

Also Published As

Publication number Publication date
EP4295048A1 (de) 2023-12-27

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