EP3580455A1 - Pompe à vide sans huile dotée d'un piston prismatique et compresseur correspondant - Google Patents

Pompe à vide sans huile dotée d'un piston prismatique et compresseur correspondant

Info

Publication number
EP3580455A1
EP3580455A1 EP17822592.6A EP17822592A EP3580455A1 EP 3580455 A1 EP3580455 A1 EP 3580455A1 EP 17822592 A EP17822592 A EP 17822592A EP 3580455 A1 EP3580455 A1 EP 3580455A1
Authority
EP
European Patent Office
Prior art keywords
oil
vacuum pump
outlet
free vacuum
shaft
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
EP17822592.6A
Other languages
German (de)
English (en)
Other versions
EP3580455B1 (fr
Inventor
Franz Pawellek
Conrad Nickel
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.)
Nidec GPM GmbH
Original Assignee
Nidec GPM 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
Application filed by Nidec GPM GmbH filed Critical Nidec GPM GmbH
Publication of EP3580455A1 publication Critical patent/EP3580455A1/fr
Application granted granted Critical
Publication of EP3580455B1 publication Critical patent/EP3580455B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/02—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders arranged oppositely relative to main shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0409—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
    • F04B39/0016—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons with valve arranged in the piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/04—Piston machines or pumps characterised by having positively-driven valving in which the valving is performed by pistons and cylinders coacting to open and close intake or outlet ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/047—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being pin-and-slot mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible

Definitions

  • the present invention relates to an oil-free vacuum pump with a prismatic piston and a similar device for use as an oil-free running compressor.
  • Vacuum pumps are used in numerous application areas of pneumatics in process engineering processes or in vehicle construction. In the automotive sector, for example, they are required to adjust exhaust flaps, vanes on turbochargers with variable turbine geometry or a bypass for boost pressure control with a wastegate. You can also take over the function to operate a central locking or headlight flaps.
  • Vane pumps In vehicle construction, predominantly rotary positive displacement pumps, such as vane pumps or rotary vane pumps, are used. Vane pumps made of metallic materials require the provision of a lubricating film between the rotating and stationary pump components in order to ensure a sufficiently gas-tight seal and a low frictional wear on the contact surfaces. Thus, for such vane pumps on the vehicle side, a lubricant supply or an integration into a circuit of a lubricant-carrying system must be provided.
  • double-stroke positive displacement pumps with oscillating components are known in the field of process engineering, and these require little lubricant at low coefficients of friction.
  • a prismatic shape instead of a cylindrical shape of the piston has been found to be advantageous, creating a lower punctual load on a piston track is achieved by means of an improved area distribution of transverse forces or tilting moments.
  • Piston is described in US 5,556,267 B.
  • the described Doppelhubpumpe is driven by an eccentric cam, which rotates in a sliding block, which in turn moves back and forth in a multi-part piston.
  • the characteristic of a sliding block generally allows the conclusion that the drive can not be operated without a lubricating oil between piston, sliding block and eccentric cam.
  • the piston is composed of several fits and parts whose sum complicates a realization of close running play in the cylinder bore and increases the complexity of manufacturing.
  • an oil-free vacuum pump for the evacuation of gaseous media having the features of claim 1.
  • This has an electric motor that drives a shaft; a pump housing having a pump chamber and an inlet and an outlet; a prismatic displacer, acting bidirectionally, on a reciprocal Working distance movable, is accommodated in the pump chamber, wherein the displacer exposes a connection between the inlet and the pump chamber in the range of two dead centers of the reciprocal working distance and covered in an intermediate region; and at least one pressure valve that releases a gaseous medium from the pump chamber through the outlet and blocks an inflow into the pump chamber; on.
  • the piston may be formed integrally with the exception of the pressure valves as an integral body.
  • the inlet pocket forms, at the dead points of the reciprocal working distance of the displacer piston, two control slots in a simple manner, which establish a connection from the inlet, past an edge of an inward displacing surface of the displacer piston into the pump chamber.
  • the inlet pocket provides a larger flow area and an antechamber so that in the short Ansaugphasen at the dead center, there is a lower intake throttle or a larger intake volume can be implemented. As a result, the volumetric efficiency of the vacuum pump is increased.
  • the crankpin may be connected via a turntable to the free end of the shaft.
  • the design of a disc-shaped connection turbulence in the rotation region between the drive and pump assembly and an imbalance of the crank pin can be minimized.
  • a rotor of the electric motor may be connected to a free end of the shaft.
  • the shaft may be supported by means of a single shaft bearing with two rows of rolling elements.
  • the electric motor may be arranged in axial overlap with the shaft bearing and a housing portion for receiving the shaft bearing. This embodiment also favors the achievement of a smaller overall axial dimension of the vacuum pump.
  • the vacuum pump having the aforementioned features can also be used as an oil-free running compressor.
  • the advantage of the construction according to the invention that no atomized lubricating oil is permanently discharged from the outlet provides, in particular, an advantage with regard to inserts, such as laboratory applications, in which a contamination-sensitive system is to be supplied with compressed air.
  • FIG. 1 shows a cross-sectional view through the pump housing and the displacer with a plan view of the electric drive.
  • Figure 2 is a cross-sectional view through the pump housing and the displacer in the opposite direction to Fig. 2.
  • FIG. 3 shows a longitudinal sectional view through the inlet and the outlet with a plan view of a displacement surface of the displacement piston
  • Fig. 4 is a longitudinal sectional view through the crankpin and the rolling bearing.
  • Fig. 5 is a longitudinal sectional view through the outlet channel of the displacement piston and the outlet.
  • a chamber wall 11 which occupies substantially the rectangular contour of the cross-sectional profile of the pump chamber 10.
  • two nozzles are formed, through which an inlet 15 and an outlet 16 open into the pump chamber 10.
  • the pump chamber 10 is closed by a housing part 13 to the drive assembly.
  • the chamber wall 11, the pump housing 1 and the housing part 13 of the are screwed together.
  • a motor housing 14 connects, in which an electric motor 4 is received.
  • the electric motor 4 is substantially constituted by a stator 41 fixed in the motor housing 14 and a rotor 43 rotatably disposed radially inside the stator 41, which seats on and drives a shaft 3.
  • the shaft 3 is connected via a double row shaft bearing 31, e.g. a water pump bearing, mounted in a central axial portion of the shaft 3.
  • the shaft bearing 31 is received in the housing part 13.
  • a receiving portion of the housing part 13, in which the shaft bearing 31 is fitted, extends both radially and axially within the rotor 43.
  • the rotor 43 on one side of the shaft bearing 31 is fixed against rotation at a free end of the shaft 3, and an electric motor effective
  • a shell portion of the rotor 43 which faces the stator 41 and includes permanent magnetic elements, extends both radially and axially beyond a portion of the shaft bearing 31.
  • a circular carrier disk 30 is arranged rotationally fixed at the other free end of the shaft 3.
  • On the support plate 30 is offset in axial extension to the shaft end and to the axis of rotation of the shaft 3, a crank pin 33 is arranged.
  • the carrier disk 30 is rotatably received in a corresponding rotationally symmetrical recess of the housing part 13.
  • crank grinding mechanism is formed via the crank pin 33 and the roller bearing 32, which engage in the elongated hole 23, which converts an eccentric drive movement into an alternating or reciprocal movement of the displacer piston 2.
  • the rolling bearing 32 is a lubricated on its life bearings, by the rolling friction between the crank pin 33 and the slot 23, an introduction of the driving force on the displacer 2, without subsequent lubricant requirement is permanently and speed guaranteed.
  • the pump housing 1 which comprises four walls of the pump chamber 10, is made as a casting or profile part or sintered part, the inner wall surfaces are also ground to a corresponding degree of a gap seal to form a gap seal in the piston raceway of the pump chamber 10.
  • the chamber wall 11 including the nozzle for the inlet 15 and the outlet 16 and the housing part 13, which close the end face of the pump chamber 10 and form the piston race are made as a casting or sintered part and adjusted by a corresponding grinding treatment to the extent of a gap seal.
  • the electric motor 4 may be configured as a reluctance motor.
  • the rotor 43 has no permanent-magnetic elements but is made of a soft magnetic material such as a laminated sheet of electric sheet. Further, the cross-section of such a rotor has pole teeth and / or sectors with lamellar air-gap structures that produce an alternating magnetic permeability diametrically through the rotor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L'invention concerne une pompe à vide sans huile servant à créer le vide de milieux gazeux, laquelle comprend un moteur électrique (4) qui entraîne un arbre (3); un carter de pompe (1) doté d'une chambre de pompe (10) ainsi que d'une entrée (15) et d'une sortie (16); un piston de refoulement prismatique (2) qui est logé dans la chambre de pompe (10) de manière à agir de façon bidirectionnelle et mobile sur un trajet de travail réciproque; et au moins une soupape de refoulement (20) qui autorise une évacuation d'un milieu gazeux hors de la chambre de pompe (10) à travers la sortie (16) et bloque un afflux dans la chambre de pompe (10). Le piston de refoulement (2) comprend un trou oblong (23) dans lequel une force d'entraînement de l'arbre (3) est introduite par le biais d'un maneton (33) au moyen d'un palier à roulement (31).
EP17822592.6A 2017-02-07 2017-12-11 Pompe à vide sans huile dotée d'un piston prismatique et compresseur correspondant Active EP3580455B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017102324.0A DE102017102324A1 (de) 2017-02-07 2017-02-07 Ölfreie Vakuumpumpe mit prismatischem Kolben und dementsprechender Kompressor
PCT/EP2017/082202 WO2018145795A1 (fr) 2017-02-07 2017-12-11 Pompe à vide sans huile dotée d'un piston prismatique et compresseur correspondant

Publications (2)

Publication Number Publication Date
EP3580455A1 true EP3580455A1 (fr) 2019-12-18
EP3580455B1 EP3580455B1 (fr) 2020-11-18

Family

ID=60888375

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17822592.6A Active EP3580455B1 (fr) 2017-02-07 2017-12-11 Pompe à vide sans huile dotée d'un piston prismatique et compresseur correspondant

Country Status (7)

Country Link
US (1) US20200124036A1 (fr)
EP (1) EP3580455B1 (fr)
JP (1) JP6830159B2 (fr)
KR (1) KR102193199B1 (fr)
CN (1) CN110249130B (fr)
DE (1) DE102017102324A1 (fr)
WO (1) WO2018145795A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE1630113A1 (sv) * 2016-07-20 2018-01-21 Norlin Petrus Pumpenhet samt kompressor utan ventil

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US333675A (en) 1886-01-05 Steam engine or pump
US779900A (en) * 1903-08-13 1905-01-10 Simplex Engine Company Rotary engine.
GB417819A (en) 1933-11-23 1934-10-12 Fairey Aviat Co Ltd Improvements in or relating to air compressors
US2323068A (en) * 1941-03-29 1943-06-29 Maniscalco Pictro Compressor
US3238889A (en) 1963-06-03 1966-03-08 Aero Spray Inc Piston drive mechanism
US4174195A (en) * 1974-11-14 1979-11-13 Lassota Marek J Rotary compressor and process of compressing compressible fluids
JPH01257775A (ja) 1988-04-06 1989-10-13 Tomoe Suzuki プランジャポンプのプランジャ駆動装置
US5556267A (en) 1993-02-05 1996-09-17 Hansen Engine Corporation Double acting pump
US5449278A (en) 1994-11-14 1995-09-12 Lin; Chi-So Double action piston having plural annular check valves
JPH0988875A (ja) * 1995-09-26 1997-03-31 Daikin Ind Ltd ターボ分子ポンプ
JP3789691B2 (ja) 1999-09-14 2006-06-28 三洋電機株式会社 高圧圧縮機の圧縮装置
JP2001280234A (ja) * 2000-03-30 2001-10-10 Shibaura Mechatronics Corp 対向式往復動ポンプ
DE10318735A1 (de) * 2003-04-25 2004-11-11 Leybold Vakuum Gmbh Kolbenvakuumpumpe
US20090013681A1 (en) * 2007-07-12 2009-01-15 Courtright Geoffrey B Energized Fluid Motor and Components
DE102011076396A1 (de) * 2011-05-24 2012-11-29 Robert Bosch Gmbh Kurbelschlaufenantrieb
JP6449576B2 (ja) * 2014-07-11 2019-01-09 国立大学法人 東京大学 容積型機械
KR101588746B1 (ko) * 2014-09-05 2016-01-26 현대자동차 주식회사 하이브리드 컴프레서
US20170350476A1 (en) * 2015-02-24 2017-12-07 Illinois Tool Works Inc. Compressor for discharging a medium

Also Published As

Publication number Publication date
JP2020506321A (ja) 2020-02-27
WO2018145795A1 (fr) 2018-08-16
KR102193199B1 (ko) 2020-12-21
JP6830159B2 (ja) 2021-02-17
CN110249130A (zh) 2019-09-17
CN110249130B (zh) 2020-09-11
US20200124036A1 (en) 2020-04-23
DE102017102324A1 (de) 2018-08-09
EP3580455B1 (fr) 2020-11-18
KR20190104203A (ko) 2019-09-06

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