WO2020055897A1 - Pompe à vide légère à surfaces oxydées - Google Patents

Pompe à vide légère à surfaces oxydées Download PDF

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Publication number
WO2020055897A1
WO2020055897A1 PCT/US2019/050455 US2019050455W WO2020055897A1 WO 2020055897 A1 WO2020055897 A1 WO 2020055897A1 US 2019050455 W US2019050455 W US 2019050455W WO 2020055897 A1 WO2020055897 A1 WO 2020055897A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum pump
oxidation
vanes
group
rotors
Prior art date
Application number
PCT/US2019/050455
Other languages
English (en)
Inventor
Tinggui Hong
Original Assignee
Fieldpiece Instruments, 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 Fieldpiece Instruments, Inc. filed Critical Fieldpiece Instruments, Inc.
Publication of WO2020055897A1 publication Critical patent/WO2020055897A1/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
    • 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
    • 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
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F04C13/008—Pumps for submersible use, i.e. down-hole pumping
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/025—Lubrication; Lubricant separation using a lubricant pump
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/40—Heat treatment
    • F04C2230/41—Hardening; Annealing
    • 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
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/92—Surface treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/90—Alloys not otherwise provided for
    • F05C2201/903—Aluminium alloy, e.g. AlCuMgPb F34,37

Definitions

  • AC/R Conditioning/Refrigeration
  • the most popular vacuum pump in the HVACR market is the rotary vane vacuum pump, which has a pump body/stator and a rotor made of one or more of cast iron, steel or powdered sintered steel.
  • Cast iron, steel and powdered sintered steel are both high density materials that make vacuum pump systems very heavy. HVACR technicians often need to carry the vacuum pump system to the top of a building or some distance to reach the HVACR system.
  • the typical vacuum pump system weight is about 30 pounds which represents a significant burden for HVACR technicians.
  • a lightweight vacuum pump with either or both of the stator and rotor made of aluminum, aluminum alloy, sintered powdered aluminum or any other suitable lightweight material that has been subjected to high energy oxidation to treat and harden the wear surfaces.
  • Plasma electrolytic oxidation (PEO) which may also be called electrolytic plasma oxidation (EPO), micro arc oxidation (MAO) or spark discharge anodizing is a high energy surface treatment that forms a deep and hard oxide layer on the lightweight metal.
  • a lightweight vacuum pump may be made of any suitable powdered metallurgy aluminum alloy and at least the wear and bearing surfaces may be hardened with a suitable high energy oxidation process.
  • stator and bearing surfaces may be treated with a suitable high energy surface treatment.
  • the lightweight vacuum pump may be submerged in an oil tank such that the oil covers the pump.
  • the oil bath will help trap contaminants, seal the gaps between stages and lubricate the components.
  • the oil bath also conducts the heat from the pump to the oil and convection will cool the oil tank and pump .
  • Figure 1 is a perspective view of a vacuum pump system with the housing and oil reservoir removed for clarity.
  • Figure 2 is a perspective view of a vacuum pump system with the oil reservoir.
  • Figure 3 is a perspective view of an aluminum vacuum pump casing with oxidized surfaces.
  • Figure 4 is an exploded perspective view of the aluminum vacuum pump of Figure 3.
  • Figure 5 is an alternate exploded perspective view of the aluminum vacuum pump of Figure 3.
  • Figure 6 is a plan view of the bottom of the
  • Figure 7 is a cross-section view of the aluminum vacuum pump of Figure 6 taken along A-A.
  • Figure 8 is a plan view of the side of the aluminum vacuum pump of Figure 3.
  • Figure 9 is a cross-section view of the aluminum vacuum pump of Figure 8 taken along B-B.
  • Figure 1 is a perspective view of a vacuum pump system 1 with the housing and oil reservoir not shown for clarity.
  • the air-cooled aluminum vacuum pump 2 is operatively connected to motor 3.
  • Figure 2 is a perspective view of a vacuum pump system including the oil reservoir 4 secured to the aluminum vacuum pump 2.
  • Figure 3 illustrates aluminum vacuum pump 2 as a rotary vane vacuum pump having a first stage 8, a second stage 9 and an optional integrated oil pump 10.
  • FIGs 4 and 5 are exploded alternate perspective views of the aluminum vacuum pump 2.
  • the first stage 8 includes the stator or housing 8S, rotor 8R and vanes 8V.
  • the stator 8S and rotor 8R are formed of aluminum, aluminum alloy or sintered aluminum powder.
  • the volute 11 of the first stage is enclosed by first side or end wall wear surface 12, second side or end wall wear surface 13 (visible in Figure 5, which is part of the second stage stator or housing 9S, and the generally cylindrical inner wall of the volute, primary volute wear surface 14.
  • the vanes 8V are biased by springs 15 to maintain contact with the inside or primary wear surface 14 of the first stage volute 11.
  • the first and second side wear surfaces 12 and 13 as well as the primary volute wear surface 14 are treated with any suitable high energy oxidation process such as PEO, EPO, MAO, spark discharge anodizing or any other suitable high energy oxidation process.
  • Bearing surfaces such as first stator bearing surface 16, first stage rotor bearing surfaces 17 and 18 as well as the outer cylindrical surface and side surfaces of the rotor, rotor wear surfaces 19 and 19S respectively, along with the second stage stator bearing surface 20 in the second stage housing may optionally be treated with any suitable high energy oxidation process.
  • vanes such as first stage vanes 8V and second stage vanes 9V may also be formed of a suitable material
  • the vanes can be formed of untreated polymer, carbon, graphite or other suitable
  • the second stage 9 includes the stator or housing 9S, rotor 9R, vanes 9V, seal 24 and cap 9C.
  • the stator 9S and rotor 9R are formed of aluminum, aluminum alloy or sintered aluminum powder.
  • the volute 25 of the second stage is
  • first side or end wall wear surface 26 second side or end wall wear surface 27 (visible in Figure 5) of the second stage cap 9C, and the generally cylindrical inner wall of the volute, primary second stage volute wear surface 28.
  • the vanes 9V are biased by springs 15 to maintain contact with the inside or primary wear surface 28 of the second stage volute 25.
  • the side wear surfaces 26 and 27 as well as the primary volute wear surface 28 are treated with any suitable high energy oxidation process such as PEO, EPO, MAO, spark discharge anodizing or any other suitable high energy
  • Bearing surfaces such as rotor bearing surfaces 30 and 32 on the second stage rotor and the outer cylindrical surface and side surfaces of the rotor, rotor wear surfaces 31 and 31S respectively, may also be treated with any suitable high energy oxidation process.
  • Optional oil pump 10 includes stator or housing 10S, vanes 10V and cap IOC. Vanes 10V engage a slot 36 in second stage rotor 9R.
  • the wear surfaces of the oil pump volute, sides first and second side surfaces 37 and 38 as well as primary wear surface 40 are treated with any suitable high energy oxidation process such as PEO, EPO or MAO or any other suitable high energy oxidation process.
  • Figure 6 is a plan view of the bottom of the
  • Figure 7 is a cross-section view of the aluminum vacuum pump 2 and the optional oil pump 10 of Figure 6 taken along A-A illustrating the interrelationship of the internal parts as well as the wear and bearing surfaces such as first stage bearing surface 18 and second stage stator bearing surface 20.
  • the primary volute wear surface 14 and rotor wear surface 19 have close tolerances at interface 42 and must be hardened to prevent premature wear.
  • Figure 8 is a plan view of the side of the aluminum vacuum pump 2 showing first stage 8, a second stage 9 and an optional integrated oil pump 10.
  • Figure 9 is a cross-section view of the aluminum vacuum pump 2 and the optional oil pump 10 of Figure 8 taken along B-B illustrating the interrelationship of the internal parts and wear surfaces such as first side wear surface 26, second side wear surface 27 and second stage rotor 9R.
  • the bearing surface 30 of second stage rotor 9R engages seal 24 which in turn is engaged by second stage cap 9C.
  • the inner generally cylindrical walls of the first and second stage stators, primary wear surfaces 14 and 28 respectively may be provided as separate components such as hardened sleeves to be installed into an untreated lightweight housing.
  • the first and second side wear surfaces for the first and second stages, wear surfaces 12, 13, 26 and 27 as well as the first stage rotor bearing surfaces 17 and 18 along with the second stage rotor bearing surface 30 may be provided as separate components such as sleeves and plates that may be installed into an untreated lightweight housing or around an untreated lightweight rotor to achieve the wear resistance and the light weight as
  • any suitable lightweight material may be used for the housing, rotors and or vanes such as aluminum, aluminum alloy, sintered aluminum powder, other light metal such as zinc, magnesium or titanium or metal alloys of these or other light metals or any suitable polymer.
  • a lightweight vacuum pump may be made of any suitable powdered metallurgy aluminum alloy and at least the wear and bearing surfaces may be hardened with a suitable high energy oxidation process.
  • All the wear and bearing surfaces as well as the vanes and the rotor slots which are described above as treated with a high energy oxidation process should have a hardness of 500-3000 HV as measured by the Vickers hardness test.
  • the pump includes a stator having a cylindrical volute, a rotor rotatably disposed within the stator, and a vane coupled to the rotor and translatably disposed relative to the rotor.
  • the stator has a cylindrical inner wall, a first end wall and a second end wall.
  • the rotor has an outer cylindrical surface which may contact the stator
  • the vane has a sealing surface at a radial outer edge of said vane (the edge that scrapes the inner cylindrical surface of the stator during rotation).
  • One or more of the stator, rotor or vane comprises a wear surface comprising aluminum, and at least one wear surface has a Vickers hardness in the range of 500 to 3000 HV. Each wear surface, or a subset of the wear surfaces, may have a Vickers hardness in the range of 500 to 3000 HV.
  • the wear surfaces, or the entire component may obtain this hardness through the POE, EPO, or MAO processes mentioned above.
  • the pump as described above, preferably comprises two stages, but the advantages of
  • processing the wear surfaces with these processes may be obtained in a pump with one stage, or several stages.
  • the lightweight vacuum pump may also be made as an air-cooled, 0-ring sealed aluminum vacuum pump which may also include an oil management system with a preferential vacuum relief system that allows air instead of the oil from the sump to be drawn back into the evacuated lines attached to the vacuum pump system.
  • the oil management system also includes a primary oil reservoir with an illuminated sump for observation of the oil condition.
  • the oil reservoir also includes a large oil inlet and outlet for rapid and safe oil changes even while the pump is operating.

Landscapes

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

Abstract

Une pompe à vide légère est fabriquée avec l'un ou l'autre du stator, des rotors et des aubes en aluminium ou en alliage d'aluminium qui A été soumis à une oxydation à haute énergie, telles que l'Oxydation électrolytique par plasma (PEO), L'oxydation par plasma électrolytique (EPO) ou L'oxydation par micro-arc (MAO), pour traiter et durcir la surface.
PCT/US2019/050455 2018-09-10 2019-09-10 Pompe à vide légère à surfaces oxydées WO2020055897A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862729199P 2018-09-10 2018-09-10
US62/729,199 2018-09-10

Publications (1)

Publication Number Publication Date
WO2020055897A1 true WO2020055897A1 (fr) 2020-03-19

Family

ID=69719121

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2019/050455 WO2020055897A1 (fr) 2018-09-10 2019-09-10 Pompe à vide légère à surfaces oxydées

Country Status (2)

Country Link
US (1) US20200080561A1 (fr)
WO (1) WO2020055897A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190132020A (ko) * 2018-05-18 2019-11-27 현대자동차주식회사 내측링을 구비한 오일펌프

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309143A (en) * 1976-11-29 1982-01-05 Kernforschungsanlage Julich Gmbh Vane-disk type turbomolecular pump and etching method of manufacture of vane disks
US5122704A (en) * 1990-10-25 1992-06-16 Sundstrand Corporation Composite rotor sleeve
US5487825A (en) * 1991-11-27 1996-01-30 Electro Chemical Engineering Gmbh Method of producing articles of aluminum, magnesium or titanium with an oxide ceramic layer filled with fluorine polymers
JP5432985B2 (ja) * 2009-04-10 2014-03-05 株式会社アルバック メカニカルブースターポンプ、ターボ分子ポンプ又はドライポンプを構成する部材の表面処理方法及びこの表面処理方法により処理されたメカニカルブースターポンプ、ターボ分子ポンプ又はドライポンプ
WO2015178636A1 (fr) * 2014-05-20 2015-11-26 마그나파워트레인코리아 주식회사 Unité de moteur, unité de pompe et pompe à huile à puissance électrique

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309143A (en) * 1976-11-29 1982-01-05 Kernforschungsanlage Julich Gmbh Vane-disk type turbomolecular pump and etching method of manufacture of vane disks
US5122704A (en) * 1990-10-25 1992-06-16 Sundstrand Corporation Composite rotor sleeve
US5487825A (en) * 1991-11-27 1996-01-30 Electro Chemical Engineering Gmbh Method of producing articles of aluminum, magnesium or titanium with an oxide ceramic layer filled with fluorine polymers
JP5432985B2 (ja) * 2009-04-10 2014-03-05 株式会社アルバック メカニカルブースターポンプ、ターボ分子ポンプ又はドライポンプを構成する部材の表面処理方法及びこの表面処理方法により処理されたメカニカルブースターポンプ、ターボ分子ポンプ又はドライポンプ
WO2015178636A1 (fr) * 2014-05-20 2015-11-26 마그나파워트레인코리아 주식회사 Unité de moteur, unité de pompe et pompe à huile à puissance électrique

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