Classifications

• • 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
  • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
  • F04D29/056—Bearings
  • F04D29/057—Bearings hydrostatic; hydrodynamic
• • 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
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
  • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
• • 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
  • F04D29/60—Mounting; Assembling; Disassembling
  • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
  • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
  • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
  • F16B35/041—Specially-shaped shafts
  • F16B35/044—Specially-shaped ends
  • F16B35/045—Specially-shaped ends for retention or rotation by a tool
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
  • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
  • F16B35/06—Specially-shaped heads
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C17/00—Sliding-contact bearings for exclusively rotary movement
  • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C32/00—Bearings not otherwise provided for
  • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
  • F16C32/0681—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load
  • F16C32/0685—Construction or mounting aspects of hydrostatic bearings, for exclusively rotary movement, related to the direction of load for radial load only
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/02—Parts of sliding-contact bearings
  • F16C33/04—Brasses; Bushes; Linings
  • F16C33/046—Brasses; Bushes; Linings divided or split, e.g. half-bearings or rolled sleeves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C43/00—Assembling bearings
  • F16C43/02—Assembling sliding-contact bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
  • F16B31/04—Screwed connections specially modified in view of tensile load; Break-bolts for maintaining a tensile load
  • F16B31/043—Prestressed connections tensioned by means of liquid, grease, rubber, explosive charge, or the like
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
  • F16C2226/30—Material joints
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
  • F16C2226/50—Positive connections
  • F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut connections
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2360/00—Engines or pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2360/00—Engines or pumps
  • F16C2360/42—Pumps with cylinders or pistons
• • 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
  • Y10T29/49636—Process for making bearing or component thereof
  • Y10T29/49639—Fluid bearing
• • 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
  • Y10T403/00—Joints and connections
  • Y10T403/53—Split end with laterally movable opposed portions

Definitions

• the invention relates to a ring intended to be mounted tightly around a hydraulic machine shaft to form part of a hydrostatic or hydrodynamic bearing.
• the invention also relates to a hydraulic machine comprising, inter alia, such a ring.
• the invention relates to a method of mounting such a ring on a hydraulic machine shaft to form a portion of a hydrostatic or hydrodynamic bearing.
• a hydraulic machine comprises a rotating part, such as a turbine wheel or turbine-pump, which is intended to be traversed by a forced flow, which is driven when the machine operates in a turbine and driven when the machine operates in pump mode.
• a hydrostatic or radial hydrodynamic bearing may be provided around a shaft which supports the wheel, with a function of recovery of the radial forces undergone by this shaft.
• the inner radial portion of such a bearing is sometimes made of a metal ring which forms a hoop, in that it is mounted tightly around the shaft.
• This ring is generally monobloc, that is to say extends in a piece 360 ° around the shaft, which ensures the continuity of its outer radial surface which constitutes the inner radial surface of the bearing.
• the fact that the ring is in one part is a source of design and assembly constraints.
• Metal multipartite rings could be envisaged, these being assembled around the shaft by welding or by mechanical means.
• machining should be made on the ring, once it assembled around the shaft, after the passage holes of assembly means such as bolts would have been filled. In practice, these machining operations to be performed on site would be long and difficult, while they would not guarantee the continuity and circularity of the outer surface of the ring.
• the invention intends to remedy more particularly by proposing a new ring whose assembly around a hydraulic machine shaft is facilitated, without inducing a significant discontinuity of its external radial surface, which enables it to constitute the internal part of a hydrostatic or hydrodynamic bearing without resorting to machining.
• the invention relates to a ring intended to be mounted tightly around a hydraulic machine shaft to form a portion of a hydrostatic or hydrodynamic bearing, characterized in that it comprises, in a circumferential direction, at least a first section and at least a second section, and means for mounting the first and second sections around a shaft, in that each section comprises an outer radial surface, an inner radial surface and two slices connecting these outer radial surfaces.
• the first section is provided with at least one tapping accessible by one of its slices and adapted to receive a screw projecting from a portion of the second section, in that the or each screw is provided on the portion of its rod projecting from the edge of the second section, at least one maneuvering relief of the rod rotating about a longitudinal axis of this rod e for screwing or unscrewing the screw into the internal thread, in that the or each screw is provided with a piston sliding in a housing formed in the second section, this housing being opening on the edge of the second section and isolated from the outside by a bearing in which the rod of the screw can slide, and in that the second section is equipped with means for supplying pressurized fluid with a chamber of variable volume formed between the piston and the bearing, inside of the aforementioned dwelling.
• the two sections of a ring forming a hoop to be mounted on a hydraulic machine shaft, can be assembled by engaging the rod of each of the screws projecting from the second section into a corresponding thread of the first section, then by maneuvering this screw to screw in the tapping with the (x) relief (s) provided (s) on its rod.
• this first step it is possible to finalize the tightening of the ring-ring around the shaft of the hydraulic machine by injecting a fluid under pressure into each chamber delimited in part by the screw pistons, this which has the effect of exerting a traction force transmitted to the first section. This firmly affixes the edge of the first section against the edge of the second section.
• the structure of the ring is particularly remarkable in that the tapping, on the one hand, and the housing, on the other hand, open on the edges of the first and second sections, so that, when these slices are in abutment, against each other, these hollow volumes do not create discontinuity on the outer radial surface of the ring-hoop.
• This surface may therefore constitute the internal radial surface of a hydrostatic or hydrodynamic bearing, without the need for machining.
• the fact that the ring is multipartite facilitates the design and offers multiple possibilities of use, especially for rehabilitation sites where the geometry of the turbine shaft is imposed.
• a ring as mentioned above may incorporate one or more of the following features, taken in any technically permissible combination: -
• Each section is provided, on a first section, with minus one tapping for receiving a screw protruding from a first portion of the other section and, on a second portion, a projecting screw intended to be engaged in a tapped hole accessible by the second portion of the other section.
• each section thus carries tappings and screws intended to cooperate respectively with screws and tappings of the other section.
• Each first section is provided with several tapping, distributed over the height of its slice taken parallel to a central axis of its surface internal radial, while each second section is provided with a plurality of projecting screws, in number equal to the number of tapping of the first section, these screws being distributed over the height of its slice taken parallel to a central axis of its inner radial surface.
• Each piston of a screw is disposed in a dedicated housing and the means for supplying the chambers of the various housings with fluid under pressure are common to at least two such chambers.
• the supply means comprise at least one duct connecting at least two chambers in which are arranged the pistons of two separate screws.
• the or each chamber in which is disposed the piston of a screw is at least partially filled with a solid material.
• the invention also relates to a hydraulic machine which comprises a rotary member supported by a shaft around which is disposed a hydrostatic or hydrodynamic bearing, this machine being characterized in that it comprises a ring as mentioned above mounted around the aforementioned shaft and which defines an inner radial surface of the hydrostatic or hydrodynamic bearing.
• the invention relates to a method of mounting a ring on a hydraulic machine shaft to form part of a hydrostatic or hydrodynamic bearing, which method comprises the steps of:
• the fluid under pressure is solidified after its injection into the variable volume chamber.
• the mass of solidified material then immobilizes the piston in a clamping configuration of the constituent sections of the ring around the shaft of the hydraulic machine.
• FIG. 1 is an axial axial section of a plant incorporating a machine according to the invention
• FIG. 2 is a section on a larger scale along the line M-II in FIG. 1;
• FIG. 3 is a top view of a bipartite ring used in the installation of Figure 1 before assembly and partially cutaway;
• FIG. 4 is an enlarged view of detail IV in FIG. 3;
• - Figure 5 is a view similar to Figure 4, in a first step of assembling the ring
• - Figure 6 is a view similar to Figure 4, during a second assembly step of the ring;
• FIG. 8 is an enlarged view of detail VIII in the fig.
• Figure 9 is a view similar to Figure 4 when the ring is in a tight configuration around the machine shaft shown in Figure 1.
• the installation 1 shown in FIG. 1 comprises a Francis turbine 2 whose wheel 3 is fed from a tank 4 into which a forced pipe 5 opens.
• the turbine 2 also comprises a shaft 6 on which the wheel 3 is mounted and which rotates with it around a vertical axis Xe, this axis also being a longitudinal axis of the shaft 6.
• the shaft 6 is integral in rotation with its axis.
• another shaft 7 forming a drive member of an alternator 8.
• the wheel 3 comprises vanes 31 which extend between a ceiling 32 and a belt 33.
• the wheel 3 is fixed on the lower end 61 of the shaft 6, sometimes called "tree foot".
• the shaft foot 61 may be integral with the rest of the shaft 6 or attached thereto.
• the mounting of the wheel 3 on the shaft foot 61 takes place by means known per se, such as screws not shown.
• a hydrostatic bearing 100 is formed around the shaft 6, above the shaft base 61, in order to take up the transverse forces experienced by the shaft 6 during rotation of the moving parts 3 and 6 of the turbine 2 around of the Xe axis.
• the bearing 100 may be a hydrodynamic bearing.
• This bearing 100 is defined between a fixed liner 110 and a ring 120 forming a hoop, that is to say mounted tightly around the shaft 6.
• the liner 110 is fixed in that it does not rotate around the liner. Xe axis when the wheel 3 and the shaft 6 turn.
• the lining 110 is therefore stationary relative to the structure of the turbine 2 which comprises, in particular, the elements 4 and 5.
• the bearing 100 is delimited between the inner radial surface 111 of the liner 110 and the outer radial surface 121 of the ring 120, these surfaces being both cylindrical, circular and centered on the X axis 6 in the mounted configuration of the turbine 2.
• a feed line 160 is used to feed pressurized clear water to the gap corresponding to the bearing 100 between the surfaces 11 and 121, through the liner 110. Given the rotational movement between the surface 121 and the surface
• the ring 120 is formed of two sections 122 and 124 which are assembled around the shaft 6 by exerting on it a centripetal force, so that the ring 120 constitutes a fret for the tree 6.
• the structure of the ring 120 is apparent from FIGS. 2 to 9.
• the section 122 is semicircular and comprises an outer radial surface 1221, an inner radial surface 1222 and two slices 1223 and 1224 respectively connecting the surfaces 1221 and 1222.
• the section 124 is defined between an outer radial surface 1241. , an inner radial surface 1242 and two slices 1243 and 1244 which connect the surfaces 1241 and 1242.
• the joining of the surfaces 1221 and 1241 constitutes the surface 121 of the ring 120.
• the sections 122 and 124 are circumferential in that their internal surfaces 1222 and 1242 are abutted to constitute the inner circumferential surface 121 of the ring 120.
• the surfaces 1222 and 1242 each have a radius R1222 or Ri2 4 2 equal to, or even slightly less than, the radius R 6 of the shaft 6, in its part around which is mounted the ring 120.
• This clamping is preferably "light” in that it is not necessarily sufficient to take the seizing torque in case of damage on the bearing 100.
• This clamping is defined to take the expansion effects due to at the temperature gradient between the shaft 6 and the ring 120, as well as the effects of dilation by centrifugal effect.
• Moderate heating of the parts 6, 122 and 124 facilitates the establishment of the ring 120 around the shaft.
• the seizing torque, which is greater, can be taken up by a not shown key disposed between the shaft and the ring.
• the section 122 is provided with a bore 126 which opens on the edge
• tapping 127 centered on an axis Xi 27 perpendicular to the wafer 1223.
• the tapping 127 is accessible from the portion 1223, through the bore 126 and it can be considered that the tapping 127 opens on the wafer 1223, through the bore 126.
• section 124 is provided with a housing 128 which opens on the edge 1243 of this section and in which is engaged a head 130 in the form of a piston which belongs to a screw 132 which 134 is noted the rod.
• the rod 134 of the screw 132 passes through a bearing 136 screwed into the mouth of the housing 128 so it isolates from the outside.
• the dimensions of the bearing 136 and the rod 134 are such that this rod can slide in this bearing, along its longitudinal axis Xi 32 .
• Two chambers Ci and C 2 are defined from and other piston 130 of a screw 32, inside the housing 128 corresponding.
• the chamber Ci is delimited between the bearing 136 and the piston 130, while the chamber C 2 is delimited between the piston 130 and the bottom 1281 of the housing 128, opposite the bearing 136.
• the rod 134 is threaded over part of its length, in the vicinity of its end opposite to the head 130.
• the rod 134 In its intermediate portion 135, located between its threaded portion and its head or piston 130, the rod 134 is provided with two flats 140 diametrically opposed around the axis Xi 32 . These flats can rotate the rod 134 about the axis Xi3 2 when it is necessary to screw or unscrew the screw 132 in the tapping 127.
• the section 122 is equipped with five bores 126 and five tappings 127 on its height H 122 , that is to say on its dimension taken parallel to the axis of symmetry Xi 222 of the surface 1222 which coincides with the axis Xe in mounted configuration of the ring 120.
• the section 124 is equipped with five housings 128, five bearings 136 and five screws 132 superimposed and intended to be engaged simultaneously in the bores and housings 126 and 127 of the section 122.
• housings 128 are distributed on the height Hi 24 of the section 124, that is to say its dimension parallel to the axis of symmetry Xi 242 of its surface 1242, which axis coincides with the axis X 6 in the mounted configuration of the ring 120 around 6.
• the heights Hi 22 and Hi 24 have the same value.
• the number of housings 128 is adapted to the height Hi 22 or Hi 24 and the diameter of the heads 130.
• a first conduit 150 extends in the section 124 parallel to the height Hi 24 . This duct connects the rooms Ci of the different dwellings 128.
• a second duct 152 extends over the height Hi 24 of the section 124, parallel to the section 150. This duct 152 is connected by connections 154 to each of the chambers C 2 .
• the ducts 150 and 152 are equipped with connectors, respectively 156 and 158, for supplying them with a fluid under pressure, in particular a polymerizable resin.
• Fittings 157 and 159 respectively equip the ends of the ducts 150 and 152 opposed to the connections 156 and 159 and make it possible to connect these ducts to excess pressure fluid discharge or recirculation circuits.
• the section 122 is also equipped, at its portion 1244, five housings 128, five bearings 136 and five screws 132, while the section 124 is, in turn, provided with five bores 126 and
• an interface of the same type of the interface made between the slices 1223 and 1243 is made at the slices 1224 and 1244, the structure being simply reversed between what belongs to the section 122 and which belongs to section 124.
• the sections 122 and 124 are identical, which is advantageous in terms of manufacturing and management of spare parts.
• the flats 140 are accessible for a tool, such as a key, inserted in the direction of the arrow F 2 , between the slices 1223 and 1243.
• This tool makes it possible to rotate the rod 134 about the axis Xi 32 so as to tighten the screw 132 in the tapping 127. This has the effect of bringing the slices 1223 and 1243 closer to each other, until the configuration of Figure 6 .
• thermosetting resin is injected, at a pressure of about 1500 bars, into the duct 150.
• This resin is distributed around the screws 132 in the various chambers Ci of the section 124 and its pressure is such that it exerts on the various pistons 130 a force, represented by the arrow F 3 , sufficient to move each piston towards the bottom 1281, to the configuration of Figure 9 where the slices 1223 or 1243 are firmly supported l against each other.
• the air present in the chambers C 2 is evacuated through the connections 154 and the duct 152.
• the supply pressure of the resin is maintained for a time sufficient to allow its polymerization, so that this resin is transformed into a solid mass 170 which locks the pistons 130 in the configuration of Figure 9 where the external surfaces 1221 and 1241 are connected to each other without apparent discontinuity, so that the surface 121 does not present significant irregularity.
• the supply of the chambers C 1 in polymerizable resin under pressure takes place simultaneously in the vicinity of the wafer 1243 of the section 124 and the wafer 1224 of the section 122, so that a regular force of tightening of the sections 122 and 124 around the tree 6 is obtained. This effort is maintained as long as the chambers Ci are filled with polymerized resin.
• a "mechanical" locking of the screws 132 is thus obtained in the housings 126, in a configuration where the slices 1223 and 1243, on the one hand, 1224 and 1244, on the other hand, are firmly supported against each other. As long as the mass 170 of polymerized resin retains its properties, there can be no loosening of the screws 132 relative to the housings 128.
• the sections 122 and 124 are heated in the vicinity of the housing 128, which has the effect of rendering again the resin present in the rooms Ci. It is then possible to inject, in the chambers C 2 and through the conduit 152 and the connections 154, another fluid under pressure, which has the effect of moving the various pistons 130 towards the bearings 136, to the point that the slices 1223 and 1243, on the one hand, 1224 and 1244, on the other hand, are spaced apart from each other, making accessible again the flats 140 which make it possible to maneuver the screws 132 in a direction of unscrewing by relation to tapping 127.
• the fluidized resin is evacuated via the conduit 150 and one of the connectors 156 or 157.
• the invention makes it possible to secure, efficiently and permanently, two sections 122 and 124 constituting a ring 120. , while the outer radial surface 121 of this ring has no significant discontinuity since, once the slices 1223 and 1243, on the one hand, 1224 and 1244, on the other hand, bearing against each other, the housings and bores used are hidden.
• the tightening force exerted by each screw 132 is exerted in the vicinity of the neutral fiber of each of the sections 122 and 124.
• this force can be distributed over the height of the sections 122 and 124, thanks to the distribution of threads 127 and 128 housing on the height of these sections. This has a substantial advantage over the case where clamp bolts are installed above the upper edge and below the lower edge of a multi-partite ring.
• the invention has been shown in the case of a hydrostatic bearing. However, it is applicable to a ring forming part of a hydrodynamic bearing.

Priority Applications (8)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40793188

Family Applications (1)

Country Status (11)

Families Citing this family (7)

Citations (5)

Family Cites Families (7)

• 2008
  • 2008-11-18 FR FR0857817A patent/FR2938616B1/fr not_active Expired - Fee Related
• 2009
  • 2009-11-13 AR ARP090104407 patent/AR074345A1/es not_active Application Discontinuation
  • 2009-11-16 WO PCT/FR2009/052185 patent/WO2010058114A1/fr active Application Filing
  • 2009-11-16 CA CA2743401A patent/CA2743401C/fr not_active Expired - Fee Related
  • 2009-11-16 SI SI200930373T patent/SI2347140T1/sl unknown
  • 2009-11-16 BR BRPI0921784A patent/BRPI0921784A2/pt not_active Application Discontinuation
  • 2009-11-16 CN CN2009801458122A patent/CN102216627B/zh not_active Expired - Fee Related
  • 2009-11-16 US US13/129,632 patent/US8523444B2/en not_active Expired - Fee Related
  • 2009-11-16 ES ES09768192T patent/ES2393096T3/es active Active
  • 2009-11-16 EP EP09768192A patent/EP2347140B1/fr not_active Not-in-force
  • 2009-11-16 RU RU2011124904/12A patent/RU2504699C2/ru not_active IP Right Cessation

Patent Citations (5)

Also Published As

Similar Documents

Legal Events