CH391395A - Multi-pad gas bearing - Google Patents

Multi-pad gas bearing

Info

Publication number
CH391395A
CH391395A CH470763A CH470763A CH391395A CH 391395 A CH391395 A CH 391395A CH 470763 A CH470763 A CH 470763A CH 470763 A CH470763 A CH 470763A CH 391395 A CH391395 A CH 391395A
Authority
CH
Switzerland
Prior art keywords
balance
pads
group
bearing
gas
Prior art date
Application number
CH470763A
Other languages
French (fr)
Inventor
Sedille Marcel
Hirtz Alfred
Original Assignee
Rateau Soc
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 Rateau Soc filed Critical Rateau Soc
Publication of CH391395A publication Critical patent/CH391395A/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00Sliding-contact bearings for exclusively rotary movement
    • F16C17/02Sliding-contact bearings for exclusively rotary movement for radial load only
    • F16C17/03Sliding-contact bearings for exclusively rotary movement for radial load only with tiltably-supported segments, e.g. Michell bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C41/00Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/02Arrangements for equalising the load on a plurality of bearings or their elements

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Sliding-Contact Bearings (AREA)

Description

  

  Palier<B>à</B> gaz<B>à</B> patins multiples    La présente invention concerne un palier<B>à</B> gaz  <B>à</B> patins multiples.  



  On sait que dans les paliers<B>à</B> gaz de ce type, le  régime normal hydrodynamique s'établit, dans cer  taines conditions,<B>à</B> partir d'une vitesse de rotation du  mobile, dite vitesse de transition,<B>à</B> laquelle il se  forme un film de gaz porteur intermédiaire entre le  mobile et les patins.  



  Pour la réalisation de machines industrielles de  dimensions importantes, l'emploi de patins<B>à</B> gaz con  duit<B>à</B> donner<B>à</B> ceux-ci des dimensions également  importantes compte tenu du fait que les charges que  peuvent supporter les paliers<B>à</B> gaz sont relativement  faibles.<B>Il</B> risquerait, sinon, de se produire une rup  ture du film porteur en régime hydrodynamique. Or,  la réalisation de patins de grandes dimensions, en  particulier de grande portée, pose des problèmes de  stabilité géométrique si l'on veut éviter les déforma  tions, telles que les distorsions, nuisibles au bon fonc  tionnement des paliers<B>à</B> gaz.  



  <B>Il</B> convient donc de répartir les patins par grou  pes comprenant un certain nombre de patins, de  façon<B>à</B> répartir les charges sur différents éléments de  dimensions réduites par rapport<B>à</B> celles que devrait  avoir le patin unique.  



  Il se présente cependant un problème d'équili  brage des charges réparties sur les patins d'un groupe,  la présente invention permet de résoudre ce     pro-          blùme.     



  <B>A</B> cet effet, suivant l'invention, les patins de cha  que groupe sont montés sur un dispositif<B>à</B>     balanzier     afin d'assurer l'équilibrage des charges appliquées aux  patins du groupe, ce dispositif<B>à</B> balancier prenant  appui sur un seul point fixe d'articulation.  



  Ainsi, par exemple, si les dimensions de la ma  chine contraignent<B>à</B> diviser en un groupe<B>à</B> deux  patins chaque patin d'un palier<B>à</B> trois patins, chacun    des deux patins du groupe supportera effectivement  une charge égale<B>à</B> la moitié de la charge qui serait  supportée par un seul patin, et l'on aura en tout trois  points de report des charges pour. le palier, comme  cela serait le cas avec un palier<B>à</B> trois patins arti  culés en trois points. En définitive, le palier com  prenant trois groupes<B>à</B> deux patins est     autolignant     comme le serait un palier<B>à</B> trois patins.  



  Dans un mode de réalisation, le dispositif ser  vant<B>à</B> supporter et<B>à</B> équilibrer les deux patins d'un  groupe comprend un balancier articulé autour d'un  axe médian monté sur un tourillon qui peut pivoter  dans un logement fixe autour d'un axe perpendicu  laire au plan contenant ledit balancier et son axe  médian, les deux patins     étantarticulés   <B>à</B> chacune des  extrémités du balancier autour d'axes également per  pendiculaires au plan contenant ledit balancier et son  axe médian.  



  Bien entendu, chaque groupe peut comprendre un  nombre de patins égal<B>à</B> un multiple de 2, et en par  ticulier quatre patins. Dans ce dernier cas on peut,  par exemple, utiliser un dispositif analogue au précé  dent mais dans lequel<B>le</B> balancier précité porte<B>à</B>  chacune de ses extrémités un autre balancier perpen  diculaire, et supportant tout en les équilibrant deux  des patins<B>à</B> chacune de ses extrémités.  



  Le dessin montre,<B>à</B> titre d'exemple, des formes  d'exécution particulières du palier selon l'invention.  Les     fig.    la<I>et</I><B>lb</B> sont des vues schématiques en  coupe transversale et en coupe longitudinale respec  tivement montrant un seul palier<B>à</B> gaz<B>à</B> trois patins  pour supporter un arbre<B>;</B>  les     fig.    2a et<B>2b</B> sont des vues schématiques ana  logues, mais dans le cas d'un groupe<B>à</B> deux patins<B>;</B>  la     fig.   <B>3</B> montre un mode de réalisation d'un dis  positif<B>à</B> balancier permettant d'équilibrer les charges  de deux patins d'un groupe, et      la     fig.    4 montre un mode<B>de</B> réalisation d'un dis  positif<B>à</B> balancier dans<B>le</B> cas de quatre patins par  groupe.  



  On voit sur la     fig.    la l'un des patins<B>1</B> d'un palier  <B>à</B> gaz<B>à</B> fonctionnement hydrodynamique<B>à</B> trois pa  tins, pour un arbre 2. Les charges exercées sur cha  que patin tel que<B>1</B> sont reportées sur la structure  fixe<B>3</B> par<B>-</B>l'intermédiaire d'une articulation 4.  



  Dans les cas envisagés plus haut, il peut être  opportun de remplacer chaque patin tel que<B>1</B> par  deux     sous-patins    la et<B>lb</B> sur lesquels se répartissent  les charges qui sont équilibrées par un dispositif<B>à</B>  balancier indiqué d'une manière générale par<B>5</B> sur  la     fig.   <B>2b,</B> et dont un mode de réalisation est détaillé  sur la     fig.   <B>3.</B> Ce dispositif<B>à</B> balancier permet de re  porter les charges en un point fixe<B>6</B> tout en assu  rant l'équilibrage de celles-ci sur les deux patins.  



  Comme représenté sur la     fig.   <B>3,</B> le dispositif com  prend un balancier<B>7</B> qui peut pivoter autour d'un  axe<B>8</B> situé<B>à</B> sa partie médiane. Cet axe<B>8</B> est porté  par un tourillon<B>9</B> qui peut pivoter dans un loge  ment<B>10</B> de la structure fixe<B>3</B> autour d'un axe<B>11</B>  perpendiculaire au plan contenant le balancier<B>7</B> et  l'axe<B>8. A</B> chacune de ses extrémités, le balancier<B>7</B>  comporte un tourillon 12 perpendiculaire au plan  contenant le balancier<B>7</B> et l'axe<B>8.</B> Chacun des tou  rillons 12 est engagé dans un logement ménagé dans  le patin correspondant la ou<B>lb</B> du groupe. On voit  aisément que ce dispositif assure l'équilibrage des  charges sur les deux patins du groupe tout en repor  tant ces charges sur un seul point fixe.

      La     fig.    4 montre un mode de réalisation du dis  positif<B>à</B> balancier dans le cas où l'on est conduit<B>à</B>  utiliser un groupe<B>à</B> quatre patins<I>la,<B>lb,</B></I>     lc   <I>et</I>     ld     <B>à</B> la place d'un seul patin.



  The present invention relates to a <B> gas </B> bearing <B> with </B> multiple shoes.



  We know that in <B> gas </B> bearings of this type, the normal hydrodynamic regime is established, under certain conditions, <B> at </B> from a speed of rotation of the mobile, said transition speed, <B> at </B> which forms an intermediate carrier gas film between the mobile and the pads.



  For the production of large-sized industrial machines, the use of <B> gas </B> runners leads <B> to </B> to give <B> to </B> these equally large dimensions. taking into account the fact that the loads which the <B> gas </B> bearings can withstand are relatively low. Otherwise, there is a risk that the carrier film will break under hydrodynamic conditions. However, the production of large-dimension pads, in particular large-span, poses problems of geometrical stability if one wishes to avoid deformations, such as distortions, detrimental to the correct functioning of the bearings <B> to </ B> gas.



  <B> It </B> should therefore distribute the runners in groups comprising a certain number of runners, so as <B> to </B> distribute the loads over various elements of reduced dimensions compared to <B> to < / B> those that the single pad should have.



  However, there is a problem of balancing the loads distributed over the shoes of a group, the present invention makes it possible to solve this problem.



  <B> A </B> this effect, according to the invention, the pads of each group are mounted on a device <B> to </B> balanzier in order to ensure the balancing of the loads applied to the pads of the group , this <B> </B> pendulum device resting on a single fixed point of articulation.



  So, for example, if the dimensions of the machine force <B> to </B> to divide into a group <B> to </B> two pads each pad from a level <B> to </B> three skates, each of the two pads in the group will effectively support a load equal to <B> </B> half the load that would be supported by a single pad, and there will be a total of three load transfer points for. the bearing, as would be the case with a bearing <B> with </B> three skids articulated at three points. Ultimately, the bearing comprising three groups <B> to </B> two shoes is self-aligning, as would a bearing <B> to </B> three shoes.



  In one embodiment, the device serving <B> to </B> support and <B> to </B> balance the two pads of a group comprises a pendulum articulated about a central axis mounted on a journal which can pivot in a fixed housing around an axis perpendicular to the plane containing said balance and its median axis, the two pads being articulated <B> to </B> each of the ends of the balance around axes also perpendicular to the plane containing said balance and its median axis.



  Of course, each group can include a number of pads equal to <B> to </B> a multiple of 2, and in particular four pads. In the latter case it is possible, for example, to use a device similar to the previous one but in which <B> the </B> aforementioned balance wheel carries <B> to </B> each of its ends another perpendicular balance, and supporting while balancing two of the pads <B> at </B> each of its ends.



  The drawing shows, <B> to </B> by way of example, particular embodiments of the bearing according to the invention. Figs. <I> and </I> <B> lb </B> are schematic views in cross section and in longitudinal section respectively showing a single <B> gas </B> bearing <B> at </ B > three skids to support a tree <B>; </B> fig. 2a and <B> 2b </B> are similar schematic views, but in the case of a group <B> with </B> two pads <B>; </B> fig. <B> 3 </B> shows an embodiment of a positive <B> with </B> pendulum making it possible to balance the loads of two pads of a group, and fig. 4 shows a <B> </B> embodiment of a positive <B> to </B> balance wheel in <B> the </B> case of four pads per group.



  It is seen in fig. one of the pads <B> 1 </B> of a <B> gas </B> bearing <B> </B> hydrodynamic <B> </B> three-roller bearing, for a shaft 2. The loads exerted on each pad such as <B> 1 </B> are transferred to the fixed structure <B> 3 </B> by <B> - </B> through a joint 4.



  In the cases considered above, it may be appropriate to replace each shoe such as <B> 1 </B> by two sub-shoes la and <B> lb </B> on which the loads are distributed which are balanced by a <B> </B> pendulum device generally indicated by <B> 5 </B> in FIG. <B> 2b, </B> and an embodiment of which is detailed in FIG. <B> 3. </B> This <B> </B> pendulum device makes it possible to bring the loads to a fixed point <B> 6 </B> while ensuring that they are balanced on the the two pads.



  As shown in fig. <B> 3, </B> the com device takes a <B> 7 </B> pendulum which can rotate around an axis <B> 8 </B> located <B> at </B> its part median. This axis <B> 8 </B> is carried by a journal <B> 9 </B> which can pivot in a housing <B> 10 </B> of the fixed structure <B> 3 </B> around an axis <B> 11 </B> perpendicular to the plane containing the balance <B> 7 </B> and the axis <B> 8. At each of its ends, the balance <B> 7 </B> has a journal 12 perpendicular to the plane containing the balance <B> 7 </B> and the axis <B> 8. </ B > Each of the twists 12 is engaged in a housing provided in the corresponding pad or <B> lb </B> of the group. It is easy to see that this device balances the loads on the two shoes of the group while repor ting these loads on a single fixed point.

      Fig. 4 shows an embodiment of the positive <B> to </B> balance wheel in the case where one is led <B> to </B> use a group <B> with </B> four pads <I > la, <B> lb, </B> </I> lc <I> and </I> ld <B> to </B> instead of a single pad.

 

Claims (1)

<B>REVENDICATION</B> Palier<B>à</B> gaz<B>à</B> patins multiples caractérisé en ce que les patins sont répartis par groupes, les patins de chaque groupe étant montés sur un dispositif<B>à</B> balancier afin d'assurer l'équilibrage des charges appliquées aux patins du groupe,<B>ce</B> dispositif<B>à</B> ba lancier prenant appui sur un seul point fixe d'arti culation. <B> CLAIM </B> <B> gas </B> bearing <B> with </B> multiple pads characterized in that the pads are distributed in groups, the pads of each group being mounted on a device < B> to </B> balance in order to ensure the balancing of the loads applied to the pads of the group, <B> this </B> device <B> to </B> ba lancer resting on a single fixed point d articulation. SOUS-REVENDICATIONS <B>1.</B> Palier<B>à</B> gaz selon la revendication, caracté risé en ce que chaque groupe comprend deux patins et en ce que le dispositif<B>à</B> balancier comprend un balancier articulé autour d'un axe médian monté sur un tourillon qui peut pivoter dans un logement fixe autour d'un axe perpendiculaire au plan contenant ledit balancier et son axe médian, les deux patins étant articulés<B>à</B> chacune des extrémités du balancier autour d'axes également perpendiculaires au plan contenant ledit balancier et son axe médian. 2. SUB-CLAIMS <B> 1. </B> <B> gas </B> bearing according to claim, characterized in that each group comprises two pads and in that the device <B> to </B> balance comprises a balance articulated around a median axis mounted on a journal which can pivot in a fixed housing around an axis perpendicular to the plane containing said balance and its median axis, the two pads being articulated <B> to </ B > each of the ends of the balance around axes also perpendicular to the plane containing said balance and its median axis. 2. Palier<B>à</B> gaz selon la revendication, caractérisé en ce que chaque groupe comprend quatre patins, et en<B>ce</B> que le dispositif de balancier comprend un balancier portant<B>à</B> chacune de ses extrémités un balancier secondaire perpendiculaire<B>à</B> ce premier balancier et qui supporte deux patins disposés cha cun<B>à</B> l'une des extrémités du balancier secondaire. <B> gas </B> bearing according to claim, characterized in that each group comprises four pads, and in <B> this </B> that the balance device comprises a balance bearing <B> to </ B > each of its ends a secondary balance perpendicular <B> to </B> this first balance and which supports two runners arranged each <B> at </B> one of the ends of the secondary balance.
CH470763A 1963-01-19 1963-04-10 Multi-pad gas bearing CH391395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR921979A FR1353660A (en) 1963-01-19 1963-01-19 Improvements to multi-pad gas bearings

Publications (1)

Publication Number Publication Date
CH391395A true CH391395A (en) 1965-04-30

Family

ID=8795077

Family Applications (1)

Application Number Title Priority Date Filing Date
CH470763A CH391395A (en) 1963-01-19 1963-04-10 Multi-pad gas bearing

Country Status (3)

Country Link
CH (1) CH391395A (en)
FR (1) FR1353660A (en)
GB (1) GB977575A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784265A (en) * 1972-12-18 1974-01-08 A Cornford Journal bearing
US4637738A (en) * 1985-07-31 1987-01-20 Vincent Barkley Alignment compensator for linear bearings
US7845855B2 (en) * 2007-04-13 2010-12-07 Delaware Capital Formation, Inc. Integral tilting pad bearing
DE112014003588T5 (en) * 2013-09-05 2016-05-19 Borgwarner Inc. Bend joint tilt pad radial bearing for use in a turbocharger
US9726225B2 (en) * 2015-10-28 2017-08-08 Deere & Company Distributed load bearing with an outer flex ring
DE102016221044A1 (en) * 2016-10-26 2018-04-26 Robert Bosch Gmbh tilting pad

Also Published As

Publication number Publication date
GB977575A (en) 1964-12-09
FR1353660A (en) 1964-02-28

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