US20070101794A1 - Method and device for mounting a rotating member - Google Patents
Method and device for mounting a rotating member Download PDFInfo
- Publication number
- US20070101794A1 US20070101794A1 US11/589,467 US58946706A US2007101794A1 US 20070101794 A1 US20070101794 A1 US 20070101794A1 US 58946706 A US58946706 A US 58946706A US 2007101794 A1 US2007101794 A1 US 2007101794A1
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- United States
- Prior art keywords
- diabolo
- beams
- lintels
- axis
- inclination
- 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.)
- Abandoned
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/08—Anodes; Anti cathodes
- H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
- H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
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- 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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/02—Sliding-contact bearings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/18—Assembling together the component parts of electrode systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/10—Drive means for anode (target) substrate
- H01J2235/1046—Bearings and bearing contact surfaces
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2235/00—X-ray tubes
- H01J2235/10—Drive means for anode (target) substrate
- H01J2235/1046—Bearings and bearing contact surfaces
- H01J2235/1053—Retainers or races
-
- 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
- Y10T403/70—Interfitted members
- Y10T403/7047—Radially interposed shim or bushing
- Y10T403/7061—Resilient
Definitions
- the present invention is directed to a method and a device for mounting a rotating member.
- the present invention is directed to a source of radiation and, more particularly the mounting of a rotating anode in an X-ray tube and a method for manufacturing a part of this device.
- the rotating anode tubes are X-ray emitting tubes used mainly in mammography, although their use can be envisaged in other fields of radiology, especially tomodensitometry.
- mammography the conditions of the examination require the patient to place his or her breast on a breast-support tray.
- An X-ray emitting device generally placed on a vertical column that bears the breast-support tray, is placed close to the patient's head.
- an X-ray tube with rotating anode has an anode rotating at high speed.
- the anode is positioned so that, on one side, it faces a cathode and, on the other, a window that is vacuum-tight but enables the passage of the emitted X-rays.
- the rotation of the anode is prompted by a rotor working by means of bearings.
- the rotor drives the rotating anode to which it is fixedly joined.
- the shaft is fixed in the tube by being fixed at both its ends.
- the shaft is thus fixed to a first structure, namely a first part of the sheathing of the tube, on one side and to a second structure, namely a second part of the sheathing, on the other side.
- the two structures are then linked to each other. If the linking of the structures is rigid, such an assembly leads to a hyperstatic condition in the holding of the shaft and, at a mechanical level, it entails breaks that are unacceptable.
- one end of the shaft is mounted in a structure that is, in principle, the lightest and/or least rigid type of structure, using a ring that allows certain degrees of freedom.
- the rings used which generally have a squirrel-cage shape, are elastic but have the drawback of not being reusable. Indeed, the rings are deformed because they have to be force-fitted when mounted in a structure, before the insertion of a shaft end. Furthermore, the insertion of the rings themselves requires an exertion of considerable force during assembly.
- the value of the rings is that they resolve the problems related to the hyperstatic condition and furthermore allow the expansion caused by the heating of the anode. However, they do not resolve the problem of vibrations, which continue to be a source of problems for the patient and may even lead to faulty precision in the radiological images acquired.
- an embodiment of the invention is directed to the problems of vibration and the re-utilization of the rings.
- the rings are diabolo-shaped rings.
- the diabolo-shaped rings are supported in a housing in the structures by means of end crowns. They hold the shaft inside the diabolo by means of a narrowed central part of the diabolo.
- the ring can be adapted to the manufacturing tolerance values of the bores that receive the ends of the shaft. The insertion of the rings therefore no longer necessitates any excessive force fitting.
- the rings can consequently be re-utilized.
- the diabolo is hyperboloid shape.
- An embodiment of the invention is directed to a method for making the diabolo-shaped rings so that the cost of their manufacture is reduced to the minimum.
- the diabolo shape is a hyperboloid shape.
- An embodiment of the invention is a device for mounting a rotating anode in an X-ray tube comprising, in a first structure, a bore, a ring housed in this bore, with one end of a shaft of the rotating anode inserted in this ring, wherein the ring comprises a diabolo shape generated by revolution about an axis of the shaft.
- An embodiment of the invention is a method for the manufacture of a diabolo comprising: forming a diabolo from a cylinder; forming beams in one wall of the diabolo wherein the beams being could be inclined.
- FIG. 1 is a schematic view of the device for mounting a rotating anode
- FIGS. 2 to 6 exemplify the making of a hyperboloid structure generated by revolution fulfilling the role of a diabolo
- FIGS. 7 to 9 illustrate the effects of the mounting of the diabolo in the mounting device
- FIGS. 10 a to 10 e show dimensions of a hyperboloid diabolo
- FIG. 11 depicts a modified form of construction relating to that of FIG. 2 ;
- FIG. 12 depicts a modified form of construction relating to that of FIG. 1 .
- FIG. 1 shows a device for mounting a rotating member such as an anode 1 in an X-ray tube.
- the X-ray tube itself is not shown.
- the rotating anode 1 is thus rigidly mounted on a motor-driven rotor (preferably a brushless electric motor) about a shaft 3 .
- the shaft 3 is mounted, for example rigidly, in a first fixed structure 4 and by means of the ring 5 , in a second structure 6 .
- a rotor 2 and the rotating anode 1 rotate about an axis of rotation 7 aligned with the shaft 3 .
- the shaft 3 is rigidly fixed to the structure 4 by known means. For example, it is screwed into the structure with a screw.
- the structures 4 and 6 are furthermore connected in the sheathing of the X-ray tube so that they are fixed with respect to each other.
- one of the two structures in this case the structure 4 , is massive.
- the other structure namely the structure 6 , is lighter.
- the structure 4 is less sensitive than the structure 6 to the vibratory forces generating an acoustic source. This type of assembly gives rise to vibrations transmitted by the shaft 3 to the structure 6 , which then sends out disturbing noises despite the presence of the ring 5 .
- the ring 5 has a diabolo shape generated by revolution about an axis that is the axis 7 of the shaft 3 .
- This shape is shown in FIGS. 5 and 6 .
- Such an axis comprises a first crown 8 and a second crown 9 , both circular and cylindrical, with generatrix lines parallel to the axis 7 of the shaft 3 .
- These crowns 8 and 9 are connected to each other by a set of beams that, in this embodiment are inclined as shown at 10 . It is possible however to provide non-inclined beams but, as shall be seen here below, the inclination of the beams better ensures the integrity of the ring when it is being used.
- the mounting of the diabolo between the shaft 3 supporting the rotating elements and the structure 6 of the sheathing of the tube then gives the desired noise attenuation.
- FIG. 2 shows a plate 11 , for example, a thin plate made of metal or an alloy, or even a composite material in which straight slots 12 are made, enabling the beams 13 to be individualized between each of the slots.
- the slots 12 and beams 13 are rectilinear, and in this example, they are oriented at right angles to the direction of two lintels 14 and 15 that connect the beams 13 to one another.
- the slots 12 can be cut out in this manner by laser, matrix punching, etching or other similar methods.
- a plate 11 is formed by making it turn about a circular cylindrical chuck oriented along an axis 16 parallel to the directions of the slots 12 and of the beams 13 .
- the ends of the lintels 14 and 15 can be soldered together so that the ring is closed.
- the ring can be left open.
- an aperture 20 ( FIG. 2 ) in a lintel, for example, the lintel 15 .
- This aperture can be made as a prolongation of a central slot 21 .
- the ends 22 and 23 of the lintel 15 are joined together, for example by soldering, while the corresponding ends of the lintel 14 are not joined.
- Another procedure may comprise the use of a parallelogram-shaped plate 24 rather than that of a rectangular plate 11 .
- the slots 25 are inclined, as also the beams 26 , relative to the normal to the lintels 14 and 15 (shown in FIG. 11 ).
- the plate 24 then undergoes the same operation of shaping about a chuck with an axis 16 perpendicular to the lintels 14 and 15 .
- This cylindrical ring is obtained, it can be stressed in a shaping mold.
- the mold on the whole has the negative shape of the diabolo to be made, so that the beams 26 are forced to bend towards the interior of the ring, in the direction of the axis 27 of the ring.
- the inclination of the beams 26 on the lintels 14 and 15 may be about 50° plus or minus 10°.
- the mold that receives the ring of FIG. 4 b is a mold having a shape generated by revolution with an axis of revolution orthogonal to the directions of the lintels 14 and 15 .
- the diabolo it is also possible to start from a thick cylinder, for example with a thickness 28 , as shown in FIG. 6 . By lathing, it is then possible, in this thick cylinder, to obtain concavity by removing portions 29 from the diabolo, as also excess thickness from the crowns 8 and 9 , inside the diabolo. Once this diabolo is thus made, it is possible especially by laser cutting to individualize the beams 10 between the crowns 8 and 9 .
- the molding method and the hollowing-out method do not necessarily lead to a hyperboloid diabolo.
- the twisting method leads to it naturally.
- FIGS. 7 and 8 show the inner diameter of the diabolo, respectively before 30 and after 33 the insertion of the shaft 3 .
- solid lines indicate the curves 31 of the sheaths of the beams 10 while dashes 32 indicate the same sheaths before insertion. It is seen that the initial diameter 30 has widened to become the diameter 33 receiving the shaft 3 .
- the differences of curvature 31 and 32 constitute the elasticity that holds the end of the shaft 3 in the structure 6 ( FIG. 1 ).
- FIG. 9 shows a diagram of forces, with a sinusoidal amplitude, occurring when the shaft 3 is subjected to radial forces.
- the distribution 34 of the stresses and their evaluation is such that it enables the thickness of the ring 5 , typically the thickness of the plate 11 or the plate 24 , to be chosen. It also makes it possible to define the angles of inclination of the beams 10 relative to axes 7 , 19 or 27 . It also enables the number of beams 13 to be defined. Finally, it enables the nature of the material, especially its Young's modulus, to be defined. These elements are furthermore determined as a function of the desired difference in flexion, namely the difference between the curvatures 31 and 32 or between the diameters 30 and 33 .
- FIGS. 10 a to 10 e show a particular embodiment of a ring having a hyperboloid shape.
- FIG. 10 b is a sectional view along the direction AA of FIG. 10 a
- FIG. 10 c is a sectional view along the direction BB.
- FIGS. 10 d and 10 e are views in perspective. All these figures show that the ring has twenty slots and therefore twenty beams.
- This ring which, in one example, has been obtained by the third method described, has hyperboloid beams with a twist angle of 50° ⁇ 5° as shown in FIG. 10 e . The angle is measured in relation to an axis of revolution of the hyperboloid.
- the inner diameter of the ring is 7.6 mm with a tolerance of 5/100 th
- the external diameter of the ring being equal to 9.5 mm with a tolerance of 10/100 th
- FIG. 10 e shows that the twist angle may be 50° ⁇ 5° relative to a plane perpendicular to the axis of the shaft.
- FIG. 10 c shows that the slots have a width of 0.79 mm, plus or minus 5/100 h mm, while the beams have a width of 0.7 mm plus or minus 5/100 th and a thickness of 0.5 mm plus or minus 2/100 th .
- the height of the ring is about 12 mm, plus or minus 5/100 th ; the height of the rings 8 and 9 formed from the lintels 14 and 15 being in the range of 1.5 mm plus or minus 10/100 th .
- the thickness of the plate can be, for example, between 0.3 mm to 1.0 mm.
- the twist angle to form the hyperboloid ring may be less than or greater than 50° depending on the diameter reduction desired.
- the twist angle can be about 600 (low diameter reduction) or about 90° (high diameter reduction).
- the ring is open, especially at the position of the slots and has a first aperture 34 formed in the lintel 14 .
- the aperture 34 is diametrically opposite to an aperture 35 formed in the lintel 15 .
- the diametrical opposition is evaluated in relation to the axis of revolution of the hyperboloid structure, which is not shown here. Consequently, whatever the directions 36 , as shown in FIG. 9 , of the forces exerted on the shaft 3 , the response of the ring will be identical. There is no neglected direction, which is what would occur with open rings.
- the opening of the ring enables the insertion of the ring 5 into the bore 37 made in the structure 6 .
- the narrowing of the aperture 34 and/or the aperture 35 enables insertion and, furthermore, wedging. Furthermore, the narrowing makes it possible to accept a greater tolerance in the making of the bore that receives the end of the shaft 3 in the structure 6 .
- the embodiments make it is possible to obtain a particularly simple longitudinal holding of the shaft 3 , by making a cavity 38 generated by revolution in this shaft 3 at the position that has to receive the ring 5 .
- This cavity 38 would have, for example, a curvature that is intermediate between the curvatures 31 and 32 . If need be, on the other side, in the rigid structure 4 , it is also possible to make another bearing with the same ring 39 to also hold the other end of the shaft 3 which, in this case too, would be provided with a cavity generated by revolution. In this case, especially with the cavities, a controlled positioning of the shaft 3 would be obtained without any need to withstand longitudinal shifts.
- an embodiment of the method may comprise: in a thin plate, cut-out slots are made, interposed with parallel beams, these parallel beams being held together at their ends by lintels; the lintels and the beams are shaped around a circular chuck with an axis perpendicular to the lintels; and the circularly shaped lintels are twisted, with respect to each other, about an axis collinear with the axis of the chuck
- an embodiment of the method may comprise: in a thin plate, cut-out slots are made, interposed with parallel beams, these parallel beams being held together at their ends by lintels, the beams being inclined in relation to a direction perpendicular to the lintels; the thin plate thus cut out is deformed by being forced into a mold with a shape generated by revolution, with an axis of revolution orthogonal to the directions of the lintels; and the mold having an embossment in a central part between the ends that receive the lintels.
Abstract
A rotating anode is mounted on a shaft of an X-ray tube by means of a ring. The ring allows expansion and reduces the hyperstatic state of the assembly. The ring has the shape of a diabolo, preferably that of a hyperboloid structure generated by revolution. The ring dampens vibration phenomena in a shaft bearing the rotating anode and reduces noise-creating phenomena.
Description
- This application is a divisional application of U.S. application Ser. No. 10/825,512 filed Apr. 15, 2004, which is hereby incorporated by reference in its entirety, and claims the benefit of a priority under 35 USC 119(a)-(d) to French Patent Application No. 03 50113 filed Apr. 17, 2003, the entire contents of which are hereby incorporate by reference.
- The present invention is directed to a method and a device for mounting a rotating member. In particular, the present invention is directed to a source of radiation and, more particularly the mounting of a rotating anode in an X-ray tube and a method for manufacturing a part of this device. The rotating anode tubes are X-ray emitting tubes used mainly in mammography, although their use can be envisaged in other fields of radiology, especially tomodensitometry. In mammography, the conditions of the examination require the patient to place his or her breast on a breast-support tray. An X-ray emitting device, generally placed on a vertical column that bears the breast-support tray, is placed close to the patient's head. This proximity not only dictates particularly strict constraints of electrical installation, but also requires that the X-ray tube should not vibrate, so as not to inconvenience the patient during an examination that moreover is a stressful experience. These vibrations are noisy. In general, they are especially present as the sheathing of the tube is metallic and is itself sensitive to vibrations.
- In practice, an X-ray tube with rotating anode has an anode rotating at high speed. The anode is positioned so that, on one side, it faces a cathode and, on the other, a window that is vacuum-tight but enables the passage of the emitted X-rays. The rotation of the anode is prompted by a rotor working by means of bearings. The rotor drives the rotating anode to which it is fixedly joined. Despite all the efforts made to balance this rotating part, there are imbalances that contribute to making the entire tube vibrate. The shaft is fixed in the tube by being fixed at both its ends. The shaft is thus fixed to a first structure, namely a first part of the sheathing of the tube, on one side and to a second structure, namely a second part of the sheathing, on the other side. The two structures are then linked to each other. If the linking of the structures is rigid, such an assembly leads to a hyperstatic condition in the holding of the shaft and, at a mechanical level, it entails breaks that are unacceptable. To overcome this drawback, one end of the shaft is mounted in a structure that is, in principle, the lightest and/or least rigid type of structure, using a ring that allows certain degrees of freedom. The rings used, which generally have a squirrel-cage shape, are elastic but have the drawback of not being reusable. Indeed, the rings are deformed because they have to be force-fitted when mounted in a structure, before the insertion of a shaft end. Furthermore, the insertion of the rings themselves requires an exertion of considerable force during assembly.
- The value of the rings is that they resolve the problems related to the hyperstatic condition and furthermore allow the expansion caused by the heating of the anode. However, they do not resolve the problem of vibrations, which continue to be a source of problems for the patient and may even lead to faulty precision in the radiological images acquired.
- An embodiment of the invention is directed to the problems of vibration and the re-utilization of the rings. In an embodiment of the invention the rings are diabolo-shaped rings. The diabolo-shaped rings are supported in a housing in the structures by means of end crowns. They hold the shaft inside the diabolo by means of a narrowed central part of the diabolo. In an embodiment by making the diabolos in an open shape, the ring can be adapted to the manufacturing tolerance values of the bores that receive the ends of the shaft. The insertion of the rings therefore no longer necessitates any excessive force fitting. The rings can consequently be re-utilized. In an embodiment of the invention the diabolo is hyperboloid shape.
- An embodiment of the invention is directed to a method for making the diabolo-shaped rings so that the cost of their manufacture is reduced to the minimum. In an embodiment of the method, the diabolo shape is a hyperboloid shape.
- An embodiment of the invention is a device for mounting a rotating anode in an X-ray tube comprising, in a first structure, a bore, a ring housed in this bore, with one end of a shaft of the rotating anode inserted in this ring, wherein the ring comprises a diabolo shape generated by revolution about an axis of the shaft.
- An embodiment of the invention is a method for the manufacture of a diabolo comprising: forming a diabolo from a cylinder; forming beams in one wall of the diabolo wherein the beams being could be inclined.
- An embodiment of the invention will be understood more clearly from the following description and the accompanying figures. The figures are given purely by way of an example and in no way restrict the scope of the invention. Of these figures:
-
FIG. 1 is a schematic view of the device for mounting a rotating anode; - FIGS. 2 to 6 exemplify the making of a hyperboloid structure generated by revolution fulfilling the role of a diabolo;
- FIGS. 7 to 9 illustrate the effects of the mounting of the diabolo in the mounting device;
-
FIGS. 10 a to 10 e show dimensions of a hyperboloid diabolo; -
FIG. 11 depicts a modified form of construction relating to that ofFIG. 2 ; and -
FIG. 12 depicts a modified form of construction relating to that ofFIG. 1 . -
FIG. 1 shows a device for mounting a rotating member such as an anode 1 in an X-ray tube. The X-ray tube itself is not shown. The rotating anode 1 is thus rigidly mounted on a motor-driven rotor (preferably a brushless electric motor) about ashaft 3. Theshaft 3 is mounted, for example rigidly, in a firstfixed structure 4 and by means of thering 5, in asecond structure 6. A rotor 2 and the rotating anode 1 rotate about an axis of rotation 7 aligned with theshaft 3. In this example, theshaft 3 is rigidly fixed to thestructure 4 by known means. For example, it is screwed into the structure with a screw. Thestructures structure 4, is massive. The other structure, namely thestructure 6, is lighter. In any case, thestructure 4 is less sensitive than thestructure 6 to the vibratory forces generating an acoustic source. This type of assembly gives rise to vibrations transmitted by theshaft 3 to thestructure 6, which then sends out disturbing noises despite the presence of thering 5. - In an embodiment of the invention, the
ring 5 has a diabolo shape generated by revolution about an axis that is the axis 7 of theshaft 3. This shape is shown inFIGS. 5 and 6 . Such an axis comprises afirst crown 8 and asecond crown 9, both circular and cylindrical, with generatrix lines parallel to the axis 7 of theshaft 3. Thesecrowns shaft 3 supporting the rotating elements and thestructure 6 of the sheathing of the tube then gives the desired noise attenuation. - Several methods for manufacturing the diabolo-shaped ring of the invention are possible. By way of example, dimensions and shapes of the ring shall be specified with reference to
FIGS. 10 a to 10 c.FIG. 2 shows aplate 11, for example, a thin plate made of metal or an alloy, or even a composite material in whichstraight slots 12 are made, enabling the beams 13 to be individualized between each of the slots. Theslots 12 and beams 13 are rectilinear, and in this example, they are oriented at right angles to the direction of twolintels slots 12 can be cut out in this manner by laser, matrix punching, etching or other similar methods. - Once the cutting-out operations have been performed, as shown in
FIG. 3 , aplate 11 is formed by making it turn about a circular cylindrical chuck oriented along anaxis 16 parallel to the directions of theslots 12 and of the beams 13. After shaping, the ends of thelintels FIG. 4 a, the ring thus shaped is twisted by making thelintels axis 19 parallel to the directions of theslots 12 and beams 13. The structures obtained are shown inFIGS. 5 and 6 in which thelintels crowns - For the making of an open ring, make an aperture 20 (
FIG. 2 ) in a lintel, for example, thelintel 15. This aperture can be made as a prolongation of acentral slot 21. After shaping about theaxis 16, the ends 22 and 23 of thelintel 15 are joined together, for example by soldering, while the corresponding ends of thelintel 14 are not joined. - Another procedure may comprise the use of a parallelogram-shaped
plate 24 rather than that of arectangular plate 11. In thisplate 24, theslots 25 are inclined, as also thebeams 26, relative to the normal to thelintels 14 and 15 (shown inFIG. 11 ). Theplate 24 then undergoes the same operation of shaping about a chuck with anaxis 16 perpendicular to thelintels FIG. 4 b, in which thebeams 26 are not oriented as the generatrix lines of the cylinder but are shaped in a helix on the rim of the cylinder. Once this cylindrical ring is obtained, it can be stressed in a shaping mold. The mold on the whole has the negative shape of the diabolo to be made, so that thebeams 26 are forced to bend towards the interior of the ring, in the direction of theaxis 27 of the ring. - In one example, the inclination of the
beams 26 on thelintels FIG. 4 b is a mold having a shape generated by revolution with an axis of revolution orthogonal to the directions of thelintels - In another embodiment for making the diabolo, it is also possible to start from a thick cylinder, for example with a
thickness 28, as shown inFIG. 6 . By lathing, it is then possible, in this thick cylinder, to obtain concavity by removingportions 29 from the diabolo, as also excess thickness from thecrowns beams 10 between thecrowns - The molding method and the hollowing-out method do not necessarily lead to a hyperboloid diabolo. The twisting method leads to it naturally.
- Whatever the method of manufacture used, it leads to the positioning of
beams 10 inside the diabolo. These beams set up a narrowing of the available space within the diabolo while they are also attached, on both sides of this diabolo, to elements having circumferences of greater diameter. To this effect,FIGS. 7 and 8 show the inner diameter of the diabolo, respectively before 30 and after 33 the insertion of theshaft 3. InFIG. 8 especially, solid lines indicate thecurves 31 of the sheaths of thebeams 10 whiledashes 32 indicate the same sheaths before insertion. It is seen that theinitial diameter 30 has widened to become thediameter 33 receiving theshaft 3. The differences ofcurvature shaft 3 in the structure 6 (FIG. 1 ). -
FIG. 9 shows a diagram of forces, with a sinusoidal amplitude, occurring when theshaft 3 is subjected to radial forces. Thedistribution 34 of the stresses and their evaluation is such that it enables the thickness of thering 5, typically the thickness of theplate 11 or theplate 24, to be chosen. It also makes it possible to define the angles of inclination of thebeams 10 relative toaxes curvatures diameters -
FIGS. 10 a to 10 e show a particular embodiment of a ring having a hyperboloid shape.FIG. 10 b is a sectional view along the direction AA ofFIG. 10 a, whileFIG. 10 c is a sectional view along the direction BB.FIGS. 10 d and 10 e are views in perspective. All these figures show that the ring has twenty slots and therefore twenty beams. This ring which, in one example, has been obtained by the third method described, has hyperboloid beams with a twist angle of 50°±5° as shown inFIG. 10 e. The angle is measured in relation to an axis of revolution of the hyperboloid. In one example, the inner diameter of the ring is 7.6 mm with a tolerance of 5/100th, the external diameter of the ring being equal to 9.5 mm with a tolerance of 10/100th.FIG. 10 e shows that the twist angle may be 50°±5° relative to a plane perpendicular to the axis of the shaft.FIG. 10 c shows that the slots have a width of 0.79 mm, plus orminus 5/100 h mm, while the beams have a width of 0.7 mm plus orminus 5/100th and a thickness of 0.5 mm plus or minus 2/100th. In one example, the height of the ring is about 12 mm, plus orminus 5/100th; the height of therings lintels - In the embodiment shown in
FIG. 10 d the ring is open, especially at the position of the slots and has afirst aperture 34 formed in thelintel 14. Theaperture 34 is diametrically opposite to anaperture 35 formed in thelintel 15. The diametrical opposition is evaluated in relation to the axis of revolution of the hyperboloid structure, which is not shown here. Consequently, whatever thedirections 36, as shown inFIG. 9 , of the forces exerted on theshaft 3, the response of the ring will be identical. There is no neglected direction, which is what would occur with open rings. - The opening of the ring enables the insertion of the
ring 5 into thebore 37 made in thestructure 6. The narrowing of theaperture 34 and/or theaperture 35 enables insertion and, furthermore, wedging. Furthermore, the narrowing makes it possible to accept a greater tolerance in the making of the bore that receives the end of theshaft 3 in thestructure 6. - As shown in
FIG. 12 , the embodiments make it is possible to obtain a particularly simple longitudinal holding of theshaft 3, by making acavity 38 generated by revolution in thisshaft 3 at the position that has to receive thering 5. Thiscavity 38 would have, for example, a curvature that is intermediate between thecurvatures rigid structure 4, it is also possible to make another bearing with thesame ring 39 to also hold the other end of theshaft 3 which, in this case too, would be provided with a cavity generated by revolution. In this case, especially with the cavities, a controlled positioning of theshaft 3 would be obtained without any need to withstand longitudinal shifts. - As described an embodiment of the method may comprise: in a thin plate, cut-out slots are made, interposed with parallel beams, these parallel beams being held together at their ends by lintels; the lintels and the beams are shaped around a circular chuck with an axis perpendicular to the lintels; and the circularly shaped lintels are twisted, with respect to each other, about an axis collinear with the axis of the chuck
- As described an embodiment of the method may comprise: in a thin plate, cut-out slots are made, interposed with parallel beams, these parallel beams being held together at their ends by lintels, the beams being inclined in relation to a direction perpendicular to the lintels; the thin plate thus cut out is deformed by being forced into a mold with a shape generated by revolution, with an axis of revolution orthogonal to the directions of the lintels; and the mold having an embossment in a central part between the ends that receive the lintels.
- One skilled in the art may make or propose various modifications to the structure/way and/or function and/or result and/or steps of the disclosed embodiments and equivalents thereof without departing from the scope and extant of the invention.
Claims (35)
1. A method for the manufacture of a diabolo comprising:
forming slots in a plate, the slots being interposed with non-inclined parallel beams, the parallel beams being held together at their ends by lintels;
shaping the plate around a circular chuck with an axis perpendicular to the lintels; and
twisting the circularly shaped lintels, with respect to each other, about an axis collinear with the axis of the chuck to incline the beams.
2. A method for the manufacture of a diabolo comprising:
forming slots in a plate, the slots being interposed with parallel beams, the parallel beams being held together at their ends by lintels, the beams being inclined in relation to a direction perpendicular to the lintels;
deforming the formed plate by being forced into a mold with a shape generated by revolution, with an axis of revolution orthogonal to the directions of the lintels; and
the mold having an embossment in a central part between the ends that receive the lintels.
3. The method according to claim 1 wherein the plate is a parallelogram.
4. The method according to claim 2 wherein the plate is a parallelogram.
5. The method according to claim 1 wherein the plate is rectangular.
6. The method according to claim 1 wherein the formed slots are straight between the lintels.
7. The method according to claim 2 wherein the formed slots are straight between the lintels.
8. The method according to claim 1 wherein the formed slots are rectilinear between the lintels.
9. The method according to claim 2 wherein the formed slots are rectilinear between the lintels.
10. The method according to claim 1 wherein the formed slots are oriented at a right angle to the direction of the lintels.
11. The method according to claim 2 wherein the formed slots are oriented at a right angle to the direction of the lintels.
12. The method according to claim 1 wherein an aperture is formed in at least one diametrically opposite parts of the lintels.
13. The method according to claim 2 wherein an aperture is formed in at least one diametrically opposite parts of the lintels.
14. The method according to claim 1 wherein an aperture is formed in two diametrically opposed parts of the lintels.
15. The method according to claim 2 wherein an aperture is formed in two diametrically opposed parts of the lintels.
16. A method for the manufacture of a diabolo comprising:
forming a diabolo from a cylinder by removing portions of the cylinder; and
forming beams in a wall of the diabolo, the beams being inclined.
17. The method according to claim 1 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
18. The method according to claim 2 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
19. The method according to claim 3 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
20. The method according to claim 5 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
21. The method according to claim 6 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
22. The method according to claim 8 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
23. The method according to claim 10 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
24. The method according to claim 12 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
25. The method according to claim 14 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
26. The method according to claim 16 wherein the inclination of the beams is about 50° relative to an axis of the diabolo.
27. The method according to claim 17 wherein the inclination of the beams is 50°±10°.
28. The method according to claim 17 wherein the inclination of the beams is 50°±5°.
29. The method according to claim 1 wherein the diabolo shape has twist angle greater than or less than 50°.
30. The method according to claim 2 wherein the diabolo shape has twist angle greater than or less than 50°.
31. The method according to claim 16 wherein the diabolo shape has twist angle greater than or less than 50°.
32. method according to claim 1 wherein the diabolo has a hyperboloid shape.
33. method according to claim 2 wherein the diabolo has a hyperboloid shape.
34. method according to claim 16 wherein the diabolo has a hyperboloid shape.
35. The method according to claim 32 wherein the hyperboloid shape has an inner curvature diameter that is less than the initial diameter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/589,467 US20070101794A1 (en) | 2003-04-17 | 2006-10-30 | Method and device for mounting a rotating member |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0350113A FR2853990B1 (en) | 2003-04-17 | 2003-04-17 | DEVICE FOR MOUNTING A ROTATING ANODE OF AN X-RAY TUBE AND METHOD FOR MANUFACTURING THE SAME |
FR0350113 | 2003-04-17 | ||
US10/825,512 US7149281B2 (en) | 2003-04-17 | 2004-04-15 | Method and device for mounting a rotating member |
US11/589,467 US20070101794A1 (en) | 2003-04-17 | 2006-10-30 | Method and device for mounting a rotating member |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/825,512 Division US7149281B2 (en) | 2003-04-17 | 2004-04-15 | Method and device for mounting a rotating member |
Publications (1)
Publication Number | Publication Date |
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US20070101794A1 true US20070101794A1 (en) | 2007-05-10 |
Family
ID=33042059
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/825,512 Expired - Fee Related US7149281B2 (en) | 2003-04-17 | 2004-04-15 | Method and device for mounting a rotating member |
US11/589,467 Abandoned US20070101794A1 (en) | 2003-04-17 | 2006-10-30 | Method and device for mounting a rotating member |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/825,512 Expired - Fee Related US7149281B2 (en) | 2003-04-17 | 2004-04-15 | Method and device for mounting a rotating member |
Country Status (3)
Country | Link |
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US (2) | US7149281B2 (en) |
JP (1) | JP4474190B2 (en) |
FR (1) | FR2853990B1 (en) |
Cited By (1)
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WO2016010692A1 (en) * | 2014-07-15 | 2016-01-21 | Zachary Aaron Coon | Hyperboloid device with sliding elements |
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GB0308957D0 (en) | 2003-04-17 | 2003-05-28 | Lillishall Plastics And Engine | Tolerance ring assembly |
DE102005018369A1 (en) * | 2005-03-30 | 2006-10-05 | Hofmann Mess- Und Auswuchttechnik Gmbh & Co. Kg | Rotating anode X-ray tube |
DE102006017305A1 (en) * | 2006-04-12 | 2007-10-18 | Gerd Eisenblätter Gmbh | Mounting system, mounting adapter and mounting method |
US7850389B2 (en) * | 2006-08-15 | 2010-12-14 | Intriplex Technologies, Inc. | Tolerance ring having various end tab designs to prevent interlocking |
US8233242B2 (en) * | 2007-04-24 | 2012-07-31 | Saint-Gobain Performance Plastics Rencol Limited | Tolerance ring with overlapping layers |
DE202007012052U1 (en) * | 2007-08-29 | 2009-01-08 | Oerlikon Leybold Vacuum Gmbh | Turbo molecular pump |
US8414348B2 (en) * | 2009-02-13 | 2013-04-09 | Flambeau, Inc. | Reconfigurable rotatable performance device |
US8968049B2 (en) | 2011-03-31 | 2015-03-03 | Flambeau, Inc. | Spacer for an adjustable width rotatable performance device |
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Also Published As
Publication number | Publication date |
---|---|
US7149281B2 (en) | 2006-12-12 |
US20040240615A1 (en) | 2004-12-02 |
FR2853990A1 (en) | 2004-10-22 |
FR2853990B1 (en) | 2006-12-29 |
JP2004316919A (en) | 2004-11-11 |
JP4474190B2 (en) | 2010-06-02 |
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Owner name: GENERAL ELECTRIC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LACHERADE, XAVIER ARMAND;LE-PIERRARD, CAROLINE;JOSSE, JEAN-LUC;REEL/FRAME:018477/0280 Effective date: 20040429 |
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