WO2014023592A2 - Centrifugeuse à jet libre comportant un rotor présentant au moins une buse de recul - Google Patents

Centrifugeuse à jet libre comportant un rotor présentant au moins une buse de recul Download PDF

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Publication number
WO2014023592A2
WO2014023592A2 PCT/EP2013/065871 EP2013065871W WO2014023592A2 WO 2014023592 A2 WO2014023592 A2 WO 2014023592A2 EP 2013065871 W EP2013065871 W EP 2013065871W WO 2014023592 A2 WO2014023592 A2 WO 2014023592A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
feed channel
jet centrifuge
drive fluid
centrifuge according
Prior art date
Application number
PCT/EP2013/065871
Other languages
German (de)
English (en)
Other versions
WO2014023592A3 (fr
Inventor
Helmut Breuer
Stephan Kochmann
Holger Schwarz
Uwe Stosch
Original Assignee
Hengst Gmbh & Co. Kg
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 Hengst Gmbh & Co. Kg filed Critical Hengst Gmbh & Co. Kg
Priority to CN201380042034.0A priority Critical patent/CN104640636A/zh
Publication of WO2014023592A2 publication Critical patent/WO2014023592A2/fr
Publication of WO2014023592A3 publication Critical patent/WO2014023592A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/06—Fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/005—Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/10—Control of the drive; Speed regulating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F01M2013/0422—Separating oil and gas with a centrifuge device

Definitions

  • Free-jet centrifuge with a rotor with at least one recoil nozzle
  • the present invention relates to a free-jet centrifuge with a rotatably mounted rotor, the rotor having at least one recoil nozzle from which a pressurized drive fluid is ejected, and wherein the rotor has at least one at least partially extending in the radial direction of the rotor feed channel through which the recoil nozzle the drive fluid can be fed, and with at least one a passage cross section for the drive fluid to the recoil nozzle or a thrust nozzle bypassing the control area for the drive fluid adjusting control element.
  • a free-jet centrifuge of the type mentioned is known from DE 10 2008 013 465 A1.
  • a centrifuge housing which is adjustable by the driving fluid according to its pressure and which serves primarily to switch an air flow to assist the fluid discharge from the housing after the fluid has exited the rotor and as an additional function, it is possible to adjust a passage cross-section for the drive fluid to the recoil nozzle or a bypass cross section for the drive fluid bypassing the recoil nozzle.
  • a disadvantage is considered in this known centrifuge that it does not meet the necessary requirements, because the pressure-dependent Abregelung is insufficient.
  • the technical complexity is relatively high, which has a cost-increasing effect in the production.
  • a separator for separating oil mist from the crankcase ventilation gas of an internal combustion engine is known, with a gas cleaning space in which a rotatably mounted centrifugal rotor is arranged in the form of a stack of plates.
  • a rotary drive is arranged in a separate from the gas cleaning space drive space and by at least one be charged with pressurized lubricating oil of the internal combustion engine recoil formed nozzle.
  • the rotary drive In order to prevent damage to the centrifugal rotor due to excessive speeds, the rotary drive must be designed so that the maximum permissible speed is not exceeded at maximum lubricant oil pressure.
  • the power of the rotary drive is undesirably reduced at lower pressures, in particular when prevailing in normal operation of the internal combustion engine lubricating oil pressure, which affects the efficiency of the separator.
  • DE 103 23 261 A1 shows a centrifugal oil separator for the crankcase ventilation gas of an internal combustion engine, having a rotor with a drive shaft, via a mechanical coupling with a driven by a crankshaft of the internal combustion engine gearbox or with a hydraulic drive, in a fluid line of the internal combustion engine is integrated. connected is. It can be provided between the drive shaft on the one hand and the transmission or the hydraulic drive on the other hand, a controllable clutch for controlling the rotational speed of the rotor of the centrifugal oil separator.
  • a disadvantage here is the high technical effort for the drive of the rotor, especially when using a controllable clutch, viewed, resulting in correspondingly high production costs.
  • the object is achieved according to the invention with a free-jet centrifuge of the type mentioned, which is characterized in that the control element is arranged in the rotor and adjustable by a centrifugal force generated upon rotation of the rotor against a restoring force.
  • the rotation of the rotor and the centrifugal force caused thereby, which acts on the control element are advantageously used for the adjustment of the control element and thus for the change of the drive power of the at least one recoil nozzle.
  • the control element can be designed to be technically simple and requires in particular no complex, actively actuated elements.
  • the rotary drive can be easily configured so that even at relatively low pressure of the drive fluid, a relatively high, as close as possible to the maximum permissible speed operating speed of the rotor is achieved, which is favorable for the efficiency of the centrifuge.
  • control element is arranged in a substantially radially extending part of the feed channel and in its position within the feed channel, the passage cross-section for the drive fluid to the recoil nozzle or reducing the thrust nozzle immediate Abêtquerrough for the drive fluid by increasing in the Rotation of the rotor resulting centrifugal force is adjustable against the restoring force.
  • the arrangement of the control element in the feed itself no additional space for the accommodation of the control element is required, which allows a space-saving design.
  • a nozzle channel of the recoil nozzle emanating from an inner periphery of the feed channel at or near its radially outer end and that the control element arranged in the feed and supported at the radially outer end, by is the centrifugal force generated upon rotation of the rotor compressible spring whose outer diameter corresponds to the inner diameter of the feed channel minus a sufficient play of movement.
  • the coil spring simultaneously forms the control element and the restoring force generating element.
  • the adjacent turns of the spring approach each other, whereby a passage cross-section for the drive fluid from the feed channel, that is from the interior of the coil spring is reduced in the nozzle channel.
  • the control characteristic of the control element can be adjusted appropriately by suitable selection of the spring constant of the coil spring. To be able to influence the control characteristic of the control element to a greater extent in the free-jet centrifuge described last, it is proposed that a weight body which is movable in the longitudinal direction and permeable to the drive fluid is arranged at the radially inner end of the helical spring.
  • the force acting on the coil spring centrifugal force can be increased, which allows the use of a stronger and thus less sensitive coil spring.
  • the control characteristic of the control element can be additionally influenced in the desired manner.
  • the weight body is a cylindrical sleeve, whose outer diameter corresponds to the inner diameter of the feed channel minus a sufficient play of movement.
  • the weight body can here, like the coil spring, be accommodated in this without changing the feed channel.
  • the reduction of the free cross section of the feed channel in the region of the base body does not interfere with a sufficiently large remaining free inner diameter of the sleeve. If necessary, it is also possible to form the feed channel in the region in which moves in the operation of the centrifuge of the weight body, with a larger cross section, to allow a larger free inner cross section of the sleeve.
  • the helical spring has at least one section with a reduced turn pitch in its longitudinal direction.
  • the mass of the spring per unit length is increased so that increased centrifugal force is achieved for a given spring length and rotor speed.
  • the coil spring may have at least one section with an increased winding pitch, which provides a consistently large guide length of the spring in the feed channel, or simply be shortened.
  • a preferred embodiment provides that a section with reduced winding pitch of the coil spring is located in the longitudinal center thereof. This is the spring symmetrical and it does not matter in which orientation it is installed in the feed channel, which avoids mounting errors.
  • each section with reduced winding pitch of the helical spring lies at its ends.
  • the spring is symmetrical and their installation direction is arbitrary. It should be noted here that the radially outer portion with reduced winding pitch of the coil spring in its relaxed state does not already cover the nozzle channel. Its branch from the supply channel should therefore be expediently located at a distance from the radially outer end of the helical spring, which is greater than the length of the section with reduced winding pitch.
  • a further embodiment of the free-jet centrifuge according to the invention provides that the coil spring has a spring constant and, where appropriate, the weight body has a mass which is / are such that the turns of the helical spring come into abutment only at the maximum permissible rotational speed of the rotor. This ensures that when it is technically necessary, the drive power of the recoil nozzle or recoil nozzles is very fast completely or at least almost completely off, because in abutting state of the turns of the coil spring virtually no or very little drive fluid from the feed channel in can flow the nozzle channel.
  • the coil spring is preferably a spring made of spring steel to ensure a permanently reliable and safe function.
  • a spring is insensitive to high temperatures and to chemical influences of the drive fluids commonly used in practice. In less demanding conditions, especially at lower temperatures, a plastic spring can be used.
  • the free-jet centrifuge according to the invention is preferably designed as a lubricating oil centrifuge or as a centrifugal separator for the de-oiling of, in particular, crankcase ventilation gases. More preferably, an application of the free-jet centrifuge according to the invention to internal combustion engines of motor vehicles, in particular of passenger cars and trucks, provided. Further possible application examples are heating and block power plants, agricultural and construction machinery (off-road applications) and railway vehicles.
  • FIG. 4 the drive part of the free-jet centrifuge from FIG. 1 in three different operating states, in each case in longitudinal section,
  • FIG. 5 shows the free-jet centrifuge with rotor in a second embodiment, in a longitudinal section
  • FIG. 6 shows the detail VI of Figure 5, in an enlarged view.
  • Figure 1 of the drawing shows a complete open-jet centrifuge 1 in a longitudinal section, in which case the centrifuge 1 is designed, for example, for cleaning the lubricating oil of an internal combustion engine.
  • the free-jet centrifuge 1 has a housing 10 which is closed on the upper side by a detachable lid 1 1.
  • a rotor 2 is rotatably mounted about a rotation axis 26.
  • An upper part of the rotor 2 is formed by a dirt trap part 25.
  • a drive part 20 is used to drive the rotor 2.
  • the drive part 20 has two recoil nozzles 24, of which only the right recoil nozzle 24 is visible in the section according to FIG. From a central channel 21 of the two recoil nozzles 24 by a respective feed channel 22 and nozzle channel 23, a drive fluid, for example, under pressure lubricating oil of an associated internal combustion engine, can be fed.
  • the feed channel 22 extends at least partially in the radial direction or in a direction having a radial component, here obliquely outwards and downwards.
  • the nozzle channel 23 and the recoil nozzle 24 run approximately at right angles to the feed channel 22 in a substantially tangential direction.
  • the rotor 2 is set in rapid rotation, in practice at a speed of, for example, up to about 10,000 l / min.
  • control elements 3 are assigned.
  • the control elements 3 are designed here in the form of a respective helical spring 30, which are arranged within the respective feed channel 22.
  • the outer diameter of the coil spring 30 is selected so that the coil spring as close as possible to the inner surface of the feed channel 22, but has sufficient play in the longitudinal direction.
  • the radially outer end of the helical spring 30 is supported on the radially outer, closed end of the feed channel 22 in the radial direction.
  • a weight body 31 is arranged in the form of a cylindrical sleeve which, like the helical spring 30 in the axial direction of the feed channel 22 in this direction in the longitudinal direction is movable. After radially inward, the two weight bodies 31 are limited by a stop 32 in their movement.
  • the stop 32 is formed here by a coaxial with the central channel 21 extending sleeve, the lower edge protrudes slightly into the cross section of the feed channels 22.
  • each supply channel 22 is near the radially outer end of the nozzle channel 23 at right angles, at the outer end of each of the recoil nozzles 24 is arranged.
  • the rotor 2 of the free-jet centrifuge 1 stands still, so that now the coil springs 30 press the respective associated weight body 31 in the radial direction inwardly against the stop 32.
  • FIG. 3 a second operating state is shown in the same representation as in FIG. 2, in which the drive part 20 has already reached a certain rotational speed.
  • This rotation of the drive part 20 causes the helical spring 30 to be compressed radially outward as a result of the resulting centrifugal force, in each case assisted by the weight body 31.
  • the individual turns of the coil springs 30 are brought in the axial direction of the feed channel 22 seen at a smaller distance from each other. This reduces the free passage cross-section for the drive fluid from the feed channel 22 into the respectively associated nozzle channel 23, since the free passage cross-section is determined by the spacing of the turns of the coil springs 30 from each other.
  • FIG. 4 again in the same representation as in FIGS. 2 and 3, an operating state is shown which occurs when the drive part 20 (and the rotor 2) have reached a maximum permissible rotational speed. Due to the now even greater centrifugal force, the two coil springs 30 of the control elements 3, supported by the force of the weight body 31, so far compressed that the individual turns of the coil springs 30 abut against each other. In this way, the inflow of drive fluid from the feed channel 22 to the nozzle channel 23 practically closed off. The drive power of the drive member 20 is thus turned off very quickly and effectively or at least greatly reduced, which ensures that the drive member 20 and the rotor 2 certainly not reach an unacceptably high speed.
  • FIG. 5 A second embodiment of the free-jet centrifuge 1 is shown in Figures 5 and 6 of the drawing, in Figure 5 complete and in Figure 6, the enlarged detail VI of Figure 5.
  • the coil spring 30 seen in its longitudinal direction at least a portion 30 'with a reduced turn pitch.
  • the mass of the coil spring 30 per unit length is increased, so that at a given spring length and rotor speed increased centrifugal force and thus a changed control characteristics is achieved.
  • the section 30 'with reduced winding pitch of the coil spring 30 is here in the longitudinal center thereof.
  • the spring 30 is symmetrical, so that it is arbitrary in which orientation it is installed in the feed channel 22, which avoids mounting errors.
  • the turn pitch can be reduced so far in the sections 30 ', 30 "that the adjacent turns of the coil spring 30 abut each other even in their relaxed state.
  • a separate weight body 31, as provided in the first embodiment does not exist; its function is taken over by the section (s) 30 ', 30 "of reduced winding pitch of the helical spring 30.
  • FIGS. 5 and 6 the free jet centrifuge 1 is shown in an operating state with the rotor 2 at a standstill, with no centrifugal force occurring and therefore the helical springs 30 in the feed ducts 22 assume their relaxed state with maximum length and maximum winding spacing.
  • the structure and function of the free-jet centrifuge 1 according to the second embodiment correspond to those of the first exemplary embodiment according to FIGS. 1 to 4, to the description of which reference is made.
  • the invention can be used on virtually any free-jet centrifuges, including one-piece rotors or plate stack rotors.

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  • Centrifugal Separators (AREA)

Abstract

L'invention concerne une centrifugeuse à jet libre (1) comportant un rotor (2) logé rotatif, le rotor présentant au moins une buse de recul (24) de laquelle peut être éjecté un fluide d'entraînement sous pression, le rotor (2) présentant au moins un canal d'alimentation (22) s'étendant au moins partiellement dans la direction radiale du rotor (2), à travers lequel le fluide d'entraînement peut être fourni à la buse de recul (24). La centrifugeuse à jet libre (1) comporte également au moins un élément de régulation (3) réglant une section transversale de passage de fluide d'entraînement vers la buse de recul (24) ou une section transversale de décharge de fluide d'entraînement contournant la buse de recul (24). La centrifugeuse à jet libre (1) est caractérisée en ce que l'élément de régulation (3) est disposé dans le rotor (3) et peut être déplacé contre une force de rappel sous l'effet d'une force centrifuge produite par la rotation du rotor (2).
PCT/EP2013/065871 2012-08-06 2013-07-29 Centrifugeuse à jet libre comportant un rotor présentant au moins une buse de recul WO2014023592A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380042034.0A CN104640636A (zh) 2012-08-06 2013-07-29 具有带有至少一个反冲喷嘴的转子的自由射流离心机

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012213877.3A DE102012213877A1 (de) 2012-08-06 2012-08-06 Freistrahlzentrifuge mit einem Rotor mit wenigstens einer Rückstoßdüse
DE102012213877.3 2012-08-06

Publications (2)

Publication Number Publication Date
WO2014023592A2 true WO2014023592A2 (fr) 2014-02-13
WO2014023592A3 WO2014023592A3 (fr) 2014-05-30

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PCT/EP2013/065871 WO2014023592A2 (fr) 2012-08-06 2013-07-29 Centrifugeuse à jet libre comportant un rotor présentant au moins une buse de recul

Country Status (3)

Country Link
CN (1) CN104640636A (fr)
DE (1) DE102012213877A1 (fr)
WO (1) WO2014023592A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2939746A1 (fr) 2014-04-30 2015-11-04 Alfa Laval Corporate AB Séparateur centrifuge
EP2939747A1 (fr) 2014-04-30 2015-11-04 Alfa Laval Corporate AB Séparateur centrifuge
EP3050631A1 (fr) 2015-02-02 2016-08-03 Alfa Laval Corporate AB Diviseur secondaire rotatif

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE538912C2 (sv) 2015-05-27 2017-02-07 Apparatus for cleaning crank case gases
DE202016100479U1 (de) * 2016-02-01 2017-05-04 Reinz-Dichtungs-Gmbh Ölabscheider
DE202017100779U1 (de) * 2017-02-14 2018-05-15 Reinz-Dichtungs-Gmbh Ölabscheider mit geteilter Antriebskammer

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DE10323261A1 (de) 2003-05-23 2004-12-16 Daimlerchrysler Ag Zentrifugal-Ölabscheider für Blow-By-Gase einer Brennkraftmaschine
DE102007054922A1 (de) 2007-07-13 2009-01-15 Hengst Gmbh & Co.Kg Abscheider zum Abscheiden von Ölnebel aus dem Kurbelgehäuseentlüftungsgas einer Brennkraftmaschine sowie Funktionsmodul und Brennkraftmaschine mit einem Abscheider
DE102008013465A1 (de) 2008-03-10 2009-09-17 Hengst Gmbh & Co.Kg Schmierölzentrifuge einer Brennkraftmaschine

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DE945198C (de) * 1950-07-30 1956-07-05 Kloeckner Humboldt Deutz Ag Zentrifugal-Reinigungseinrichtung fuer Kraftstoff und Schmieroel
DE1097370B (de) * 1959-11-10 1961-01-12 Mann & Hummel Filter Fliehkraftreiniger fuer Fluessigkeiten, insbesondere Schmieroel
DE1757532C3 (de) * 1968-05-17 1979-08-23 Rudolf F. Ing.(Grad.) 2000 Norderstedt Garbaty Auslaufregler für einen Zentrifugalseparator
DE202004004215U1 (de) * 2004-03-17 2005-07-28 Hengst Gmbh & Co.Kg Freistrahlzentrifuge für die Reinigung des Schmieröls einer Brennkraftmaschine
DE102008013464A1 (de) * 2008-03-10 2009-09-17 Hengst Gmbh & Co.Kg Verfahren zum Betreiben einer Schmierölzentrifuge einer Brennkraftmaschine und Schmierölzentrifuge einer Brennkraftmaschine
DE202008011013U1 (de) * 2008-08-18 2009-10-01 Boll & Kirch Filterbau Gmbh Zentrifuge und Zentrifugenrotor hierfür
CN102527524B (zh) * 2012-01-19 2013-12-25 青岛诺凯达机械制造有限公司 自动排渣式管式分离机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323261A1 (de) 2003-05-23 2004-12-16 Daimlerchrysler Ag Zentrifugal-Ölabscheider für Blow-By-Gase einer Brennkraftmaschine
DE102007054922A1 (de) 2007-07-13 2009-01-15 Hengst Gmbh & Co.Kg Abscheider zum Abscheiden von Ölnebel aus dem Kurbelgehäuseentlüftungsgas einer Brennkraftmaschine sowie Funktionsmodul und Brennkraftmaschine mit einem Abscheider
DE102008013465A1 (de) 2008-03-10 2009-09-17 Hengst Gmbh & Co.Kg Schmierölzentrifuge einer Brennkraftmaschine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2939746A1 (fr) 2014-04-30 2015-11-04 Alfa Laval Corporate AB Séparateur centrifuge
EP2939747A1 (fr) 2014-04-30 2015-11-04 Alfa Laval Corporate AB Séparateur centrifuge
EP3050631A1 (fr) 2015-02-02 2016-08-03 Alfa Laval Corporate AB Diviseur secondaire rotatif
US10493468B2 (en) 2015-02-02 2019-12-03 Alfa Laval Corporate Ab Centrifugal separator for cleaning gas

Also Published As

Publication number Publication date
WO2014023592A3 (fr) 2014-05-30
CN104640636A (zh) 2015-05-20
DE102012213877A1 (de) 2014-02-06

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