EP2504578B2 - Schraubenspindelpumpe mit integriertem druckbegrenzungsventil - Google Patents

Schraubenspindelpumpe mit integriertem druckbegrenzungsventil Download PDF

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Publication number
EP2504578B2
EP2504578B2 EP10754884.4A EP10754884A EP2504578B2 EP 2504578 B2 EP2504578 B2 EP 2504578B2 EP 10754884 A EP10754884 A EP 10754884A EP 2504578 B2 EP2504578 B2 EP 2504578B2
Authority
EP
European Patent Office
Prior art keywords
screw
section
pump
housing
pressure chamber
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.)
Active
Application number
EP10754884.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2504578A2 (de
EP2504578B1 (de
Inventor
Walter Joistgen
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.)
Interlit Filtration GmbH
Original Assignee
Interlit Filtration GmbH
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
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Application filed by Interlit Filtration GmbH filed Critical Interlit Filtration GmbH
Publication of EP2504578A2 publication Critical patent/EP2504578A2/de
Publication of EP2504578B1 publication Critical patent/EP2504578B1/de
Application granted granted Critical
Publication of EP2504578B2 publication Critical patent/EP2504578B2/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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/16—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • F04C2/165—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/02—Arrangements of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • 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
    • F04C2230/60—Assembly methods

Definitions

  • the present invention relates to a screw pump with integrated pressure relief valve.
  • Screw pumps are usually self-priming positive displacement preferably suitable for the low pressure range and are used to promote liquids in the form of supply and disposal pumps, for conveying heavy and light fuel oils, and for all lubricating fluids, waste and residual oils and fats. Furthermore, screw pumps can be used as lubrication, sealing, control, hydraulic, cooling, and refrigeration oil pumps, as well as fuel pumps for engines.
  • a screw pump of this type which has three spindles, which are mounted parallel to each other in a pump housing.
  • the pump housing in this case forms a spindle chamber into which project the screw or shaft sections of the three spindles and which is fluidly connected to a pressure chamber.
  • the pump housing further comprises an inlet channel is formed, which opens at one axial end of the spindle chamber in this and an outlet channel formed, which opens at another axial end to form the pressure chamber in this.
  • a pressure limiting valve is inserted into the pump housing or its housing wall, which extends coaxially with the spindles and opens into the pressure outlet channel. Furthermore, the pressure limiting valve has a connection with the inlet channel formed in the pump housing.
  • the pressure relief valve opens and relaxes the overpressure on the suction side of the screw pump. This prevents a pressure overload of the pump.
  • the integration of the pressure relief valve in the pump housing makes it necessary to reinforce the pump housing or the housing wall at the intended installation location in order to create a receiving space for the pressure relief valve can. This causes an increase in the outer dimensions of the pump housing, wherein the pump is also heavier due to the additional material gate on the pump housing.
  • the basic idea of the invention is based on already existing material collections required for the function and / or installation of the pump on the pump housing for the installation of an integrated pressure relief valve. According to the invention, it is therefore provided to install the pressure relief valve in the flange portion of the pump housing, which already has a material accumulation in the pump housing or on the housing wall due to the function. In this way, no additional sprue to the pump housing must be provided so that the outer dimensions of the pump housing with respect to a screw pump without the pressure relief valve does not increase. In addition, a screw pump with such a built-pressure relief valve undergoes little or no weight gain.
  • the pressure chamber is also formed in the flange portion of the pump housing, wherein the pressure relief valve opens directly into the pressure chamber.
  • the wall thickness of the pump housing in the region of the pressure chamber remains large enough to withstand the expected pressure in the pressure chamber, without additional wall reinforcements would have to be made here.
  • the flange plate of the pump is also advantageous to mold at such a point on the pump housing that the flange plate surrounds the pressure chamber like a belt.
  • the housing wall is additionally reinforced in the region of the pressure chamber.
  • FIG. 1 shows a longitudinal section through the housing of a screw pump according to the invention with inserted spindle and built-in (integrated) pressure relief valve.
  • the pump housing 1 of the screw pump consists of a flange portion 2 for mounting the pump to a non-illustrated component and a spindle housing portion 4, which is a flange 2 separate housing part and bolted to the flange portion 2, caulked or riveted ,
  • a pressure chamber. 6 shaped, which is connected via a connecting bore 8 with a spindle chamber 10 within the spindle housing portion 4. Furthermore, an input bore 12 is formed in the flange section 2 in the axial extension of the connecting bore 8, which also opens into the pressure chamber 6 and leads to a flange-like outer side of the flange section 2 opposite the spindle housing section 4. On this outer side, a pump cover 14 is screwed, in which also a through hole 16 is formed, which is aligned axially to the connecting hole 8 and the inlet bore 12 of the flange portion 2.
  • the shaft 18 of a spindle 20 is inserted, such that it is rotatably mounted in the through hole 16 of the pump cover 14 by means of a ball or roller bearing 22.
  • the spindle shaft 18 is formed with a sealing portion 24 which is in sealing sliding engagement with the input bore 12 of the flange portion 2.
  • the spindle 20 finally forms a helical section 26 which is received in the spindle chamber 10 of the spindle housing section 4.
  • the pressure chamber 6 in the flange section 2 is formed decentralized with respect to the spindle shaft 18, that is, the pressure chamber 6 forms a radially outsourced section 6a with respect to the spindle shaft 18 and the connecting bore 8 formed in the flange section 2.
  • this radially offset or outsourced section 6a opens an outlet bore 27 of the screw pump.
  • the flange portion 2 has an annular flange plate 29 formed thereon, which surrounds the pressure chamber 6 and thereby reinforces the housing wall of the flange portion 2.
  • a pressure relief valve 28 is inserted parallel to the spindle shaft 18 in the amount of the connecting hole 8 in the flange 2 and opens into the radially offset or outsourced portion 6a of the pressure chamber 6.
  • the flange portion 2 forms in this area a material accumulation 2a, in which the pressure chamber 6 is formed on the inside and which is suitable for forming a pressure relief valve bore 30 coaxial with the connecting bore 8 of the flange portion 2.
  • the pressure relief valve 28 is positioned in a region between the spindle housing section 4 and the flange plate 29 approximately at the level of the connecting bore 8 and coaxially with the spindle shaft 18.
  • the pressure limiting valve 28 in this case consists of a valve body 32 in the form of a piston whose piston tip 34 is sealingly seated on a valve seat 36, which is formed in the pump housing 1, that is, in the flange section 2.
  • the valve body 32 is in this case biased by a spring 38 on the valve seat 36, the biasing force is adjustable via an adjusting screw 40 which is also screwed into the flange portion 2 of the pump housing 1.
  • Below the valve seat 32 is a substantially perpendicular to the pressure relief valve 28 in the flange 2 drilled drainage hole 42 is provided, which is connected to a fluid tank, not shown. As soon as a pressure set via the pretensioning spring 38 is exceeded within the pressure chamber 6, the pressure relief valve 28 opens and relaxes the overpressure directly into the fluid tank.
  • the position and orientation of the pressure relief valve 28 is not limited to the embodiment described above. Much more could the pressure limiting valve 28 also be inserted in the radial direction with respect to the connection bore 8 in the flange section 2, in which case the valve piston 32 of the pressure limiting valve 28 opens a parallel to the connecting hole 8 extending pressure relief hole between the pressure chamber 6 and a tank connection or closes. It is also conceivable to use the pressure limiting valve 28 above the flange plate 26, that is to say between the flange plate 26 and the pump cover 14 in the flange section 2, in which case the material accumulation of the flange section 2 required for the flange surface of the pump cover 14 for installation of the pressure limiting valve 28 can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Safety Valves (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP10754884.4A 2009-11-28 2010-09-15 Schraubenspindelpumpe mit integriertem druckbegrenzungsventil Active EP2504578B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009056218A DE102009056218A1 (de) 2009-11-28 2009-11-28 Schraubenspindelpumpe mit integriertem Druckbegrenzungsventil
PCT/EP2010/005657 WO2011063870A2 (de) 2009-11-28 2010-09-15 Schraubenspindelpumpe mit integriertem druckbegrenzungsventil

Publications (3)

Publication Number Publication Date
EP2504578A2 EP2504578A2 (de) 2012-10-03
EP2504578B1 EP2504578B1 (de) 2016-09-07
EP2504578B2 true EP2504578B2 (de) 2019-11-06

Family

ID=43927184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10754884.4A Active EP2504578B2 (de) 2009-11-28 2010-09-15 Schraubenspindelpumpe mit integriertem druckbegrenzungsventil

Country Status (7)

Country Link
US (1) US9404494B2 (pt)
EP (1) EP2504578B2 (pt)
JP (1) JP5693601B2 (pt)
CN (1) CN103026069B (pt)
BR (1) BR112012012684B1 (pt)
DE (1) DE102009056218A1 (pt)
WO (1) WO2011063870A2 (pt)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012005949B4 (de) * 2012-01-31 2013-09-12 Jung & Co. Gerätebau GmbH Zweispindelige Schraubenspindelpumpe in zweiflutiger Bauweise
DE102013102031B4 (de) * 2013-03-01 2016-05-12 Netzsch Pumpen & Systeme Gmbh Aus wenigstens zwei Teilen gebildete Schraubenspindelpumpe
KR20160059748A (ko) * 2014-11-19 2016-05-27 삼성에스디아이 주식회사 전극 조립체 및 이를 포함하는 배터리 팩
GB2549141A (en) * 2016-04-08 2017-10-11 Delphi Int Operations Luxembourg Sarl Fuel pump
DE102017210771B4 (de) * 2017-06-27 2019-05-29 Continental Automotive Gmbh Schraubenspindelpumpe, Kraftstoffförderaggregat und Kraftstofffördereinheit
CN107842537B (zh) * 2017-12-11 2024-04-30 江苏徐工工程机械研究院有限公司 端盖总成、液压设备及工程机械
DE102018109866A1 (de) 2018-04-24 2019-10-24 Nidec Gpm Gmbh Regelbares Schmierölfördersystem für Verbrennungsmaschinen
DE102018131587A1 (de) 2018-12-10 2020-06-10 Nidec Gpm Gmbh Regelbare Schraubenspindelpumpe
KR102172863B1 (ko) * 2020-07-30 2020-11-02 심재만 오일 펌프
DE102021208481A1 (de) 2021-08-04 2023-02-09 Vitesco Technologies GmbH Förderpumpe und Kraftfahrzeug mit einer derartigen Förderpumpe

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US3759636A (en) * 1972-03-13 1973-09-18 Dunham Busa Inc Composite variable oil pressure relief and compressor unload valve assembly
SE439042B (sv) * 1983-07-20 1985-05-28 Imo Ab Skruvpump med regleranordning
GB2353371B (en) * 1999-08-18 2003-09-17 Sauer Sundstrand Pump with integral pilot operated priority pressure regulating valve
GB2367095A (en) 2000-09-13 2002-03-27 Sauer Danfoss Valve arrangement in separating plate of multiple hydraulic pump and motor ass emblies
JP2002257043A (ja) * 2001-03-06 2002-09-11 Toyota Industries Corp 圧縮機
DE10114585A1 (de) * 2001-03-24 2002-09-26 Pfeiffer Vacuum Gmbh Vakuumpumpe
ATE330880T1 (de) 2001-07-12 2006-07-15 Cfs Slagelse As Doppelschneckenpumpe für fliessfähige feststoffe mit überlastschutz
CN2589692Y (zh) * 2002-11-15 2003-12-03 阜新汽车转向泵厂 汽车可变排量动力转向泵
JP2005207368A (ja) * 2004-01-26 2005-08-04 Denso Corp 空気供給装置
CN2791306Y (zh) * 2005-04-13 2006-06-28 但维强 带有调压阀的螺杆泵
CN2856495Y (zh) * 2006-01-14 2007-01-10 赵育基 螺杆泵流量调节装置
JP2008133818A (ja) * 2006-11-01 2008-06-12 Toyota Industries Corp 液化ガス用ポンプ
JP5196226B2 (ja) * 2007-07-23 2013-05-15 兵神装備株式会社 内袋吸込み防止装置及び汲出し装置

Also Published As

Publication number Publication date
US20130022458A1 (en) 2013-01-24
DE102009056218A1 (de) 2011-06-01
BR112012012684A2 (pt) 2016-08-23
JP2013512372A (ja) 2013-04-11
US9404494B2 (en) 2016-08-02
CN103026069A (zh) 2013-04-03
BR112012012684B1 (pt) 2020-09-01
CN103026069B (zh) 2016-08-03
WO2011063870A3 (de) 2013-01-24
JP5693601B2 (ja) 2015-04-01
EP2504578A2 (de) 2012-10-03
WO2011063870A2 (de) 2011-06-03
EP2504578B1 (de) 2016-09-07

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