GB2587504A - Method for operating a vacuum pumping system and vacuum pumping system suitable for implementing such method - Google Patents

Method for operating a vacuum pumping system and vacuum pumping system suitable for implementing such method Download PDF

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Publication number
GB2587504A
GB2587504A GB2015225.2A GB202015225A GB2587504A GB 2587504 A GB2587504 A GB 2587504A GB 202015225 A GB202015225 A GB 202015225A GB 2587504 A GB2587504 A GB 2587504A
Authority
GB
United Kingdom
Prior art keywords
pump
motor stator
oil
motor
rotor
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
GB2015225.2A
Other versions
GB2587504B (en
GB202015225D0 (en
Inventor
Bertallot Andrea
Lepore Andrea
Carboneri Roberto
De Palma Giuseppe
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.)
Agilent Technologies Inc
Original Assignee
Agilent Technologies Inc
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 Agilent Technologies Inc filed Critical Agilent Technologies Inc
Priority claimed from PCT/IB2019/050130 external-priority patent/WO2019166883A1/en
Publication of GB202015225D0 publication Critical patent/GB202015225D0/en
Publication of GB2587504A publication Critical patent/GB2587504A/en
Application granted granted Critical
Publication of GB2587504B publication Critical patent/GB2587504B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
    • F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • F04C2270/70—Safety, emergency conditions or requirements
    • F04C2270/701—Cold start
    • 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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The present invention relates to a method for operating a vacuum pumping system comprising a vacuum pump, a motor for driving said vacuum pump and an oil tank connected to said vacuum pump for providing oil as coolant and/or lubricating fluid. More particularly, the present invention relates to a method for operating such a vacuum pumping system at cold start. According to the invention, in case of "cold start", before starting the pump, the windings of the motor stator are energized while the motor rotor is kept stationary (200) and the power supplied to the windings of the motor stator is used for heating the motor stator (300). The heat can be transferred from the motor stator to the oil (400) and the temperature of the oil can be raised before the vacuum pump is started. As a result, when the motor rotor starts to rotate and to drive in rotation the pump rotor, the viscosity of the oil has decreased and the required torque has been reduced. The present invention also relates to a vacuum pumping system (50) which is particularly suitable for implementing the aforesaid method.

Claims (11)

1. Method for operating a vacuum pumping system, which vacuum pumping system comprises a vacuum pump, comprising a pump housing, in which a pump inlet and a pump outlet are provided and which receives a stationary pump stator and a rotatable pump rotor cooperating with each other for pumping a gas from said pump inlet to said pump outlet, an electric motor, which comprises a motor stator and a motor rotor cooperating with each other for driving in rotation said pump rotor, and an oil tank, which is connected to the vacuum pump for providing oil to said vacuum pump, characterized in that, before starting the pump, it comprises: - checking if a predetermined condition is met (100; 500) and, in case said predetermined condition is not met: - supplying power to said motor stator while said motor rotor is kept stationary (200); - using said power supplied to said motor stator for heating said motor stator (300); - transferring heat from said motor stator to said oil, thus incre
2. asing oil temperature and correspondingly reducing oil viscosity (400).
3. Method according to claim 1, wherein supplying power to said motor stator while said motor rotor is kept stationary (200) is continued until the duration of said step reaches a predetermined value.
4. Method according to claim 1 or 2, wherein supplying power to said motor stator while said motor rotor is kept stationary (200) is continued until the temperature of said motor stator reaches a predetermined value.
5. Method according to claim 1 or 2 or 3, wherein supplying power to said motor stator while said motor rotor is kept stationary (200) is continued until the temperature of said oil reaches a predetermined value.
6. Method according to any of the preceding claims, wherein heat is transferred from said motor stator to said oil (400) by thermal conduction.
7. Vacuum pumping system (50) comprising: - a vacuum pump (10), comprising a pump housing (12), in which a pump inlet (24) and a pump outlet (30) are provided and which receives a stationary pump stator (14) and a rotatable pump rotor (18) cooperating with each other for pumping a gas from said pump inlet to said pump outlet; - an oil tank (32), which is connected to said vacuum pump (10) by means of an oil circuit comprising one or more pipes for providing oil from said oil tank to said vacuum pump; - an electric motor (40), which comprises a motor stator (42) and a motor rotor (44) cooperating with each other for driving in rotation said pump rotor, characterized in that it comprises one or more thermal conductors (52) connecting said motor stator (42) to said oil tank (32).
8. Vacuum pumping system (50) according to claim 6, wherein said one or more thermal conductor is /are pipe(s) (52) of said oil circuit connecting said oil tank to said vacuum pump.
9. Vacuum pumping system (50) according to claim 6 or 7, wherein said pump rotor (18) is at least partially made as a hollow body, whereby a cavity (22) is defined within the body of said pump rotor, the motor stator (42) and the motor rotor (44) are received in said cavity (22) and said motor stator (42) is provided with one or more longitudinal through-holes accommodating respective thermal conductors (52) connecting said motor stator (42) to said oil tank (32).
10. Vacuum pumping system (50) according to claim 8, wherein said one or more thermal conductors are in the form of pipe(s) (52) extending through said motor stator (42) and project into said oil tank (32), ending with a mouth (54) which is arranged below the oil level in said oil tank (32).
11. Vacuum pumping system (50) according to claim 9, wherein said one or more pipes (52) are provided with radial orifices (56) at both axial ends of said motor stator (42).
GB2015225.2A 2018-02-28 2019-01-08 Method for operating a vacuum pumping system and vacuum pumping system suitable for implementing such method Active GB2587504B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800000315 2018-02-28
PCT/IB2019/050130 WO2019166883A1 (en) 2018-02-28 2019-01-08 Method for operating a vacuum pumping system and vacuum pumping system suitable for implementing such method

Publications (3)

Publication Number Publication Date
GB202015225D0 GB202015225D0 (en) 2020-11-11
GB2587504A true GB2587504A (en) 2021-03-31
GB2587504B GB2587504B (en) 2022-11-23

Family

ID=73197309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2015225.2A Active GB2587504B (en) 2018-02-28 2019-01-08 Method for operating a vacuum pumping system and vacuum pumping system suitable for implementing such method

Country Status (1)

Country Link
GB (1) GB2587504B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009096923A1 (en) * 2008-02-01 2009-08-06 Carrier Corporation Integral compressor motor and refrigerant/oil heater apparatus and method
DE102013004064A1 (en) * 2013-03-11 2014-09-11 Stiebel Eltron Gmbh & Co. Kg Heat pump with a compressor integrated in a refrigerant circuit, which has an oil sump
US20150075205A1 (en) * 2013-09-19 2015-03-19 Emerson Climate Technologies, Inc. Compressor crankcase heating control systems and methods

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009096923A1 (en) * 2008-02-01 2009-08-06 Carrier Corporation Integral compressor motor and refrigerant/oil heater apparatus and method
DE102013004064A1 (en) * 2013-03-11 2014-09-11 Stiebel Eltron Gmbh & Co. Kg Heat pump with a compressor integrated in a refrigerant circuit, which has an oil sump
US20150075205A1 (en) * 2013-09-19 2015-03-19 Emerson Climate Technologies, Inc. Compressor crankcase heating control systems and methods

Also Published As

Publication number Publication date
GB2587504B (en) 2022-11-23
GB202015225D0 (en) 2020-11-11

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