EP2844836A1 - Procédé de raccordement d'un arbre à une pièce tournante et arbre de turbocompresseur fabriqué selon ledit procédé - Google Patents

Procédé de raccordement d'un arbre à une pièce tournante et arbre de turbocompresseur fabriqué selon ledit procédé

Info

Publication number
EP2844836A1
EP2844836A1 EP13714627.0A EP13714627A EP2844836A1 EP 2844836 A1 EP2844836 A1 EP 2844836A1 EP 13714627 A EP13714627 A EP 13714627A EP 2844836 A1 EP2844836 A1 EP 2844836A1
Authority
EP
European Patent Office
Prior art keywords
shaft
clamping sleeve
central recess
rotary member
fixing
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.)
Withdrawn
Application number
EP13714627.0A
Other languages
German (de)
English (en)
Inventor
Johannes Schmid
Bernd Reinsch
Ugur Kisa
Andreas Burghardt
Jochen Rager
Bernd Lutz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2844836A1 publication Critical patent/EP2844836A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/06—Making machine elements axles or shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/025—Fixing blade carrying members on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/4932—Turbomachine making

Definitions

  • the present invention relates to a method for connecting a shaft to a rotary component, in particular a turbine and / or compressor, and a turbocharger shaft produced by this method.
  • Turbine or a compressor wheel known these methods are used for example in the manufacture of exhaust gas turbochargers for the automotive industry.
  • Form positive connection which defines the shaft in the radial direction relative to the impeller.
  • the shaft In the axial direction, the shaft is fixed by means of a shaft nut opposite the impeller, i. by means of a frictional connection.
  • the invention proposes in a first aspect according to claim 1, a method for producing a connection of at least one rotary member with a shaft, wherein the at least one rotary member a central recess and the shaft at least a first portion along the shaft and a second portion at a Front end of the shaft, the method comprising the following steps:
  • Rotational component is set; wherein the steps of fixing are each performed in a form-fitting manner.
  • the invention proposes a first aspect according to claim 12
  • Turbocharger shaft which is connected to at least one rotary member, wherein the connection between the shaft and the rotary member according to the method of the first aspect is carried out.
  • the advantage of the method or of the turbocharger shaft produced according to the method according to one embodiment results from the fact that the shaft only in each case by a positive connection in both the radial and in the axial direction relative to the rotary member, i. the turbine wheel and / or the compressor wheel is fixed. That is, the connection between the shaft and / or compressor wheel can be produced in a particularly simple manner, which also materials can be used, which otherwise due to their properties, such as mechanical workability and thermal expansion behavior, only with relatively large cost and time-intensive Work out effort.
  • the step of fixing the shaft at its first portion in the central recess of the at least one rotary component comprises an eccentric configuration arranged on the first portion, namely eccentrically in FIG
  • connection between shaft and wheel is also due to the positive engagement of the eccentric configuration also self-locking, but again solvable because of
  • turbocharger enhances the effect of the positive connection by itself.
  • connection between shaft and wheel is also self-centering.
  • step of fixing the shaft at its second portion by means of caulking a ball in a corresponding recess on the one end side of the shaft takes place, so that the shaft is positively fixed relative to the at least one rotational component in the axial direction.
  • the step of fixing the shaft at its first section in the central recess of the at least one rotary component preferably takes place by means of a knurling arranged on the first section, which has axially parallel grooves along the shaft, wherein the central recess of the at least one rotary component has a corresponding knurling with corresponding grooves has, so that the shaft relative to the central recess of the at least one rotary member is fixed in a form-fitting manner in the radial direction.
  • This type of connection is of relatively high connection strength.
  • a closure lid member is arranged on the front side, wherein the closure lid member comprises a machinable material, so that a balancing of the at least one rotary component can be carried out by a corresponding processing or cutting of the closure lid member, which has the advantage that the Rotary component for balancing does not need to be machined.
  • the shaft is fixed relative to the at least one rotary component both with the first portion of the shaft and with the second portion of the shaft together in the central recess, wherein the first portion of the shaft and the second portion of the shaft substantially in the region of the end face the shaft are arranged.
  • the rotary member does not have to be laboriously machined in such a way that the shaft extends completely through the rotary member.
  • the eccentric configuration preferably has at least two, preferably three wedge-shaped regions in the circumferential direction of the shaft.
  • the wedge-shaped regions preferably each have a pitch ratio, as seen in the circumferential direction of the shaft, between 1: 25 to 1: 200, which produces a relatively high and secure connection strength when rotating the shaft relative to the rotary component, and is also detachable.
  • the shaft is fixed at its first portion in the central recess of the at least one rotary member by means of a first and a second clamping sleeve, which are slotted in each case in the longitudinal direction, wherein the first clamping sleeve has an inner diameter which substantially the
  • the first clamping sleeve has on its outer side at least two wedge-shaped regions in the circumferential direction of the clamping sleeve, and the second clamping sleeve has an inner diameter corresponding to the
  • Recess of the rotary member are arranged so that the first clamping sleeve is positively fixed with the shaft and the second clamping sleeve is positively fixed with the central recess of the rotary member.
  • This type of connection has a relatively high and secure strength, and is also solvable again.
  • the at least one rotary component is a turbine wheel and / or compressor wheel of a turbocharger, wherein the turbine or compressor wheel may preferably be made of titanium aluminide, which has a particularly high strength at the same time relatively low weight.
  • Figure 1 shows a shaft and a turbine wheel according to a first embodiment of the
  • Figure 2 shows a shaft and a turbine wheel according to a second embodiment of the invention
  • 3 shows a shaft and a turbine wheel according to a third embodiment of the
  • FIG. 4 shows a shaft and a turbine wheel according to a fourth embodiment of the
  • Figures 5a and 5b show a shaft and a turbine wheel according to a fifth embodiment of the invention.
  • Embodiment of the invention show.
  • a shaft 10 is shown in a rather schematic and explosive manner, which - in an initially unconnected manner - through a central recess 20 of a rotary member 30 extends therethrough, which in the example shown a turbine wheel of a turbocharger not shown in its entirety
  • the shaft 10 has a first portion 50 and a second portion 60, wherein the second portion 60 forms an end of the shaft 10, while the second end of the shaft 10 is not shown, since the shaft 10 for clarity in the illustration in Figure 1 is interrupted. In the illustration shown in Figure 1, the shaft 10 would continue to extend (in the drawing in Figure 1 down), so that at its other end, for example, a compressor could be attached. In principle, however, it does not matter for the method described whether it is a turbine wheel or a compressor wheel.
  • the first portion 50 of the shaft 10 has an eccentric configuration 70, i.
  • the central recess 20 corresponds in terms of its inner diameter and shape with the eccentric projection 71, i.
  • the shaft 10 can be axially inserted into the recess 20 in the manner of a clearance fit, until the stop 72 rests against the recess 20, and fix by radial rotation of the shaft 10 relative to the recess 20 such that the shaft 10 in the radial direction is fixed relative to the turbine wheel 30.
  • the shaft 10 is pressed by pressing the ball 40 into a recess (not shown in FIG. 1) located on the second portion 60 of the shaft 10, i. on an end face 65 of the shaft 10, fixed or fixed.
  • a Verstemmwulst By pressing or caulking the ball 40 into the recess on the second region of the shaft 10, a Verstemmwulst, which allows the fixing of the shaft 10 in the axial direction relative to the turbine wheel 30.
  • FIG. 1 illustrates a second embodiment of the invention.
  • the first section 50 comprises a projection 71 formed with longitudinal grooves 73 instead of the eccentrically formed projection.
  • a collar-shaped stop 72 in FIG. 2 substantially corresponds to FIG.
  • a recess 20 corresponds in terms of its diameter and the formation with corresponding grooves 74 with the projection 71, wherein the grooves 74 complementary to the on
  • Projection 71 trained longitudinal grooves 73 are.
  • a fixation of the shaft 10 relative to the turbine wheel 30 is again by the first portion 50 is inserted into the recess 20 until the stop 72 abuts the recess 20, and that the grooves 73 engage in the grooves 74 a form-fitting manner.
  • the shaft 10 is fixed relative to the turbine wheel 30 in the radial direction.
  • the shaft 10 is then arranged in the axial direction by means of the ball 40 in a second section 60 (not here)
  • Figure 3 illustrates a third embodiment of the invention, wherein, in contrast to the embodiments shown in Figures 1 and 2, the first portion 50 and the second portion 60 of the shaft 10, based on the longitudinal axis 1 1 of the shaft 10, so to speak coincide. 3 already shows the result of the method, ie the connected state of shaft 10 with turbine wheel 30.
  • the particular difference in this embodiment compared to the previous embodiments is that the shaft 10 does not extend completely through the turbine wheel 30, but only to the depth of the central recess 20. A complete piercing of the turbine wheel 30 is therefore not necessary. Otherwise, the manner of fixing the shaft 10 relative to the turbine wheel 30 in both the radial and in the axial direction is analogous to those with reference to Figures 1 and 2 explained embodiments.
  • the type of axial fixing of the shaft 10 by its second portion 60 relative to the turbine wheel 30 is again effected by means of a ball 40, which is caulked in a, shown in Figure 3 in cross-section, recess 41.
  • FIG. 4 illustrates a fourth embodiment of the invention, this embodiment essentially corresponding to the embodiments explained with reference to FIGS. 1 and 2, with the difference that on the end face 65 of the shaft 10
  • Closure cover 80 is attached.
  • This closure lid member 80 is made of a relatively easy to machine material so as to easily balance the assembly of shaft 10 with turbine wheel 30 attached thereto, otherwise it might be relatively more difficult to achieve balancing by machining the turbine wheel 30. because of the relatively hard material of the turbine wheel 30, such as Titanium aluminide.
  • Figures 5a and 5b illustrate a fifth embodiment of the invention, this embodiment most closely corresponding to the embodiment explained with reference to Figure 1.
  • the slope ratio of these wedge-shaped regions 71a, 71b, 71c, ie the ratio of the region length L to the region height H, which in the example illustrated in FIG. 5b are plotted for the wedge-shaped region 71a, is preferably in the range from 1:25 to 1: 200, so that a relatively safe self-locking connection between shaft 10 and turbine wheel 30 results when the shaft 10 is rotated with its portion 50 in the central recess 20 relative to the turbine wheel 30 and the recess 20 is correspondingly complementary to the wedge-shaped portions 71 a, 71 b, 71 c formed (in Figure 5a, however, not shown) ,
  • Figures 6a and 6b illustrate a sixth embodiment of the invention, this embodiment being understood as a modification of the embodiment explained with reference to Figures 5a and 5b.
  • the first portion 50 of the shaft 10 comprises two nested clamping sleeves 91, 92, which are arranged together on the shaft 10.
  • the two clamping sleeves 91, 92 are shown as being located in the central recess 20 of the turbine wheel 30, wherein only a part of the turbine wheel 30 is shown.
  • FIG. 6b II again shows the two clamping sleeves 91, 92 taken individually, but from a different perspective. It can be seen in particular that the clamping sleeve 92 is disposed within the clamping sleeve 91, wherein the outer diameter of the
  • the inner diameter of the clamping sleeve 92 is slightly larger than the outer diameter of the shaft 10.
  • Figure 6b II shows that the clamping sleeves 91, 92 each have a collar-shaped stop 72a, 72b in the shape of a hexagon, which together form the stop 72.
  • the stops 72a, 72b serve to the clamping sleeves 91, 92 using for example an open-end wrench
  • FIG. 6b III shows a cross-sectional view of the two clamping sleeves 91, 92. It can be seen on the one hand that the clamping sleeves 91, 92 each have a slot 93 or 94, the function of which will be explained. On the other hand, it can be seen that the clamping sleeve 92 has along its outer circumference three wedge-shaped portions 92a, 92b, 92c, in analogy to the wedge-shaped portions 71 a, 71 b, 71 c in Figure 5b.
  • the clamping sleeve 91 along its inner circumference complementary to the wedge-shaped portions 92a, 92b, 92c of the clamping sleeve 92 formed wedge-shaped portions 91 a, 91 b, 91 c, in analogy to wedge-shaped areas within the central recess 20 in Figure 5a (Fig. but not shown there).
  • the outer diameter of the clamping sleeve 91 increases due to the interaction of the wedge-shaped areas and due to the presence of the slot 93, so that the outer circumference of the clamping sleeve 91 presses against the inner circumference of the recess 20, and thus a - fixed in the radial direction - positive, and detachable connection between shaft 10 and turbine wheel 30 is made.
  • the collar-shaped stopper 72a bears against the recess 20.
  • a fixation in the axial direction is as above with respect to the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supercharger (AREA)

Abstract

L'invention concerne un procédé de production d'un raccordement d'au moins une pièce tournante (30) à un arbre (10), la ou les pièces tournantes comportant un évidement central (20) et l'arbre comportant une première partie (50) le long de l'arbre et une deuxième partie (60) sur le côté frontal (65) de l'arbre. Ledit procédé comprend les étapes suivantes : la fixation de l'arbre au niveau de sa première partie dans l'évidement central de la ou des pièces tournantes au moyen d'une structure excentrique (7), de sorte que l'arbre est solidarisé en direction radiale avec la ou les pièces tournantes; et la fixation de l'arbre au niveau de sa deuxième partie par matage d'une bille (40), de sorte que l'arbre est solidarisé en direction axiale avec la ou les pièces tournantes. Les étapes de fixation sont chacune effectuées par complémentarité de forme.
EP13714627.0A 2012-05-02 2013-04-03 Procédé de raccordement d'un arbre à une pièce tournante et arbre de turbocompresseur fabriqué selon ledit procédé Withdrawn EP2844836A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201210207271 DE102012207271A1 (de) 2012-05-02 2012-05-02 Verfahren zum Verbinden einer Welle mit einem Rotationsbauteil und nach diesem Verfahren hergestellte Turboladerwelle
PCT/EP2013/056979 WO2013164147A1 (fr) 2012-05-02 2013-04-03 Procédé de raccordement d'un arbre à une pièce tournante et arbre de turbocompresseur fabriqué selon ledit procédé

Publications (1)

Publication Number Publication Date
EP2844836A1 true EP2844836A1 (fr) 2015-03-11

Family

ID=48050008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13714627.0A Withdrawn EP2844836A1 (fr) 2012-05-02 2013-04-03 Procédé de raccordement d'un arbre à une pièce tournante et arbre de turbocompresseur fabriqué selon ledit procédé

Country Status (4)

Country Link
US (1) US20150125306A1 (fr)
EP (1) EP2844836A1 (fr)
DE (1) DE102012207271A1 (fr)
WO (1) WO2013164147A1 (fr)

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Also Published As

Publication number Publication date
US20150125306A1 (en) 2015-05-07
WO2013164147A1 (fr) 2013-11-07
DE102012207271A1 (de) 2013-11-07

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