EP2707608A1 - Ensemble arbre et procédé de fabrication d'un ensemble arbre et élément de liaison en tant que produit semi-fini - Google Patents

Ensemble arbre et procédé de fabrication d'un ensemble arbre et élément de liaison en tant que produit semi-fini

Info

Publication number
EP2707608A1
EP2707608A1 EP12721501.0A EP12721501A EP2707608A1 EP 2707608 A1 EP2707608 A1 EP 2707608A1 EP 12721501 A EP12721501 A EP 12721501A EP 2707608 A1 EP2707608 A1 EP 2707608A1
Authority
EP
European Patent Office
Prior art keywords
connecting element
fiber bundles
retaining pins
shaft
retaining
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Withdrawn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
EP12721501.0A
Other languages
German (de)
English (en)
Inventor
Carsten Sohl
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.)
Schafer MWN GmbH
Original Assignee
Schafer MWN 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 Schafer MWN GmbH filed Critical Schafer MWN GmbH
Publication of EP2707608A1 publication Critical patent/EP2707608A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/026—Shafts made of fibre reinforced resin
    • 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
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts 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
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors
    • 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
    • Y10T403/7075—Interfitted members including discrete retainer

Definitions

  • the invention relates to a shaft assembly for transmitting torques and a method for producing such a shaft assembly and a connecting element as a precursor for the production of a shaft assembly.
  • a shaft assembly for transmitting torques and a method for producing such a shaft assembly and a connecting element as a precursor for the production of a shaft assembly.
  • Particularly preferred such a shaft assembly is used in wind turbines to connect a rotor hub with a generator.
  • the invention is based on the object to provide an aforementioned shaft assembly and a method for their preparation, can be achieved with the problems of the prior art and in particular very stable and durable in continuous use shaft assembly can be created, which can transmit high torques on the one hand and on the other hand, in particular for capturing torque peaks has a certain twistability or torsional ability.
  • connecting elements are provided at both ends of the shaft assembly. With these, a mechanical coupling or connection can be made to the outside, namely at a wind power tan would be on the one hand to the hub of the rotor and on the other hand to the generator.
  • the connecting elements are each overlapped by end regions of a central connecting shaft tube.
  • This shaft tube consists of a fiber composite material with a plurality of fiber bundles or the like with a resin. have been glued in a known manner.
  • the connecting elements in the region overlapped by the shaft tube have a multiplicity of projecting holding pins.
  • the fiber bundles are placed around these holding pins or between these holding pins or extend accordingly. This allows a very good mechanical coupling of the shaft tube made of fiber composite material to the connecting elements. A pure bond would not be sufficient due to the insufficient strength for the transmission of very high torque.
  • the connecting elements are tube-like, in particular relatively short compared to the total length of the shaft assembly.
  • At least one connecting element at its free end has a flange-like extension in the manner of a disc. This can then be coupled with a larger diameter than in the shaft assembly itself either to a hub or a generator. Alternatively, another even larger disc can be screwed or provided just to the rotor hub out, which in turn is bolted to the hub. It is also possible that both connecting elements have a flange-like extension.
  • a conical course can be provided at least on one side of the shaft arrangement or the shaft tube can widen conically towards its free end.
  • the connecting element may have a corresponding conical shape with either decreasing wall thickness into the conically widened end of the shaft tube or else by a likewise conical course. In any case, it should be correspondingly conical on its outside in the connection area.
  • a better transition to a middle area with a smaller diameter can thus be achieved.
  • the torsional stiffness and the bending stiffness can be reduced slightly. This can be compensated on the one hand torque peaks and on the other hand with respect to the bending stiffness slight deviations of the alignment of the hub and the generator axis can be compensated without complex and prone universal joints or other compensating joints with moving parts.
  • An outer diameter reduction of the corrugated pipe between the largest portions at the ends of the corrugated pipe and the constant center portion may be at least 20%, preferably 30% to 40%. This means that the corrugated tube in the middle region is significantly slimmer than at the ends.
  • such a central region can be at least 50% of the length of the corrugated tube, preferably 60% to 80%.
  • the aforementioned reduction in torsional rigidity and flexural rigidity can be better achieved.
  • the connecting elements in particular also the shaft tube, are rotationally symmetrical about a longitudinal central axis. So a uniform stability and a round run can be achieved.
  • the retaining pins can basically be fastened or produced in a variety of ways.
  • they are inserted into holes in the connecting elements, in particular in the prescribed conically tapered areas of connecting element and shaft tube.
  • This is particularly advantageous with interference fit, advantageously by the holding pins have a press fit with, for example, 5 ⁇ to 50 ⁇ or about 0.05% to 0.2% of the diameter of the retaining pin.
  • Such a press fit has the advantage of easier to manufacture compared to a screw and is sufficiently stable, since mainly shear forces act on the retaining pins and no pull-out forces in their longitudinal direction.
  • the alternative possibility of blunt welding of retaining pins is considered to be detrimental to alternating loads with respect to torsion of the shaft assembly.
  • the retaining pins are advantageous cylindrical and elongated and are a few inches above the fasteners on. - -
  • the retaining pins are arranged or extend at right angles to the surface or outer side or outer surface of the connecting elements. Then the holes into which they are pressed, provided with appropriate orientation, but this is also easily possible.
  • the retaining pins are then claimed by the adjacent fiber bundles and the forces exerted by these forces exactly perpendicular to their longitudinal direction.
  • the retaining pins are distributed uniformly on the connecting element. Particularly advantageous they each have the same distances to each other on the one hand in the circumferential direction and on the other hand in the longitudinal direction of the shaft tube. Under certain circumstances, this can also be varied, in particular in order to achieve as optimized as possible progressions of the fiber bundles in the connection region. In particular, a distance in both directions may be similar.
  • the retaining pins can be provided along 4 to 1 1 circumferential circular rings. It is particularly advantageous seven or eight such rings. Their distance may be in the range of the thickness of the shaft tube in the connection area.
  • retaining pins may be provided in the circumferential direction around the connecting element 10 to 50 retaining pins, advantageously 25 to 40.
  • the number of retaining pins with a smaller circumference can decrease, but this need not be so.
  • the fiber bundles advantageously undergo a course change behind several holding pins or even each holding pin. It may even be provided that they are applied in such a way that they have such a course change virtually in the region of each retaining pin on which they pass.
  • An overall direction of the fiber bundle may be oblique to the longitudinal center axis of the corrugated tube, which is true anyway when winding such tubes and is also advantageous for the connection region. Furthermore, the above-described wraps of the retaining pins can be better achieved by the fiber bundles.
  • a change in the profile of a fiber bundle on a retaining pin can be small. Although it may be up to 90 °, but preferably it has a rotation angle or arc angle of 20 ° to 60 °, more preferably from 25 ° to 45 °.
  • a good support of the fiber bundles on the retaining pins and thus a good power transmission.
  • the special power transmission properties of the fiber bundles are still well taken into account, which are rather worsened by too frequent and too strong changes in direction.
  • a fiber bundle runs at each change in the same direction or with the same direction of rotation about a retaining pin around or wraps around this. So that a fiber bundle in the overall direction then does not deviate too much from a favorable course direction, the prescribed angles of the loop can be closer to the lower limit mentioned or even lower.
  • the course changes per fiber bundle essentially each time a different sense of rotation. This means that although the fiber bundles do not have to change their course with every retaining pin, at least some or most of the retaining pins have to change their course. Ultimately, however, the entire direction of the fiber bundles is less strongly changed for the highest possible stability of the fiber composite material itself and the connection with - - the connecting element.
  • fiber bundles can also be mixed gradients are provided with different rotation so that per retaining pin, the fiber bundles sometimes rotate in one direction of rotation and sometimes in the other direction of rotation.
  • These fiber bundles can also each run exactly opposite obliquely to the longitudinal center axis of the shaft assembly, which is both for the stability properties of the shaft tube of advantage and causes a resultant force on the retaining pins approximately in the longitudinal direction of the shaft assembly.
  • the thickness of the layer formed by the fibers, which overlap on the connecting element remains below the length of the retaining pins. Then, the retaining pins can project beyond the layer of fiber bundles or the end portions of the shaft tube a small piece. This ensures that even the uppermost fiber bundles do not slip off the retaining pins, so to speak.
  • a cover layer runs as a kind of cuff above the retaining pins, advantageously circumferentially. This just prevents fiber bundles from slipping off the retaining pins, for example because they loosen slightly.
  • a sleeve can in turn advantageously consist of a fiber composite material and be wound in the circumferential direction. Alternatively, it can also be made of metal.
  • the fiber bundles which yield the shaft tube are wound directly onto the connecting elements with the retaining pins or inserted between the retaining pins. It is therefore not made the shaft tube separately from the connection areas and then connected these parts together. Thus, a maximum solid bond between connecting elements and shaft tube can be created. Due to the special shape of the shaft tube with the above-described thinner middle region, the above-described desired torsional properties and bending properties can be achieved.
  • the fiber bundles are first applied to the connecting element, even on its expanded end portions, for example, with an auxiliary structure for winding.
  • the retaining pins are guided or pressed through the fiber bundles, thereby displacing the fibers of the fiber bundle. Preferably, this is done with still completely wet fibers.
  • the retaining pins are then fastened in bores in the widened connecting element and penetrate substantially, in particular completely, the fiber bundles.
  • the fiber bundles can be compressed even more for a higher strength. Above all, however, the winding up of the fiber bundles can be considerably simplified and at the same time more uniform and firm.
  • the holes for the retaining pins are introduced into the connecting element before the winding of the fiber bundles, preferably by drilling from the outside inwards.
  • the retaining pins are in principle introduced from inside to outside through the holes in the fiber bundle applied to the connecting element or pressed.
  • the retaining pins may advantageously be tapered or tapered towards the outside, in particular with removable tapers or points, for example by means of a thread.
  • the tips can be removed after pressing the retaining pins and, as described above, the retaining pins are covered.
  • the retaining pins are already arranged in the holes before the application of the fiber bundles without thereby overhanging the outer surface or outside of the connecting element. For this they have been previously preferably introduced from the inside into the holes. In particular, the retaining pins should approach until just before the outer surface of the connecting element, so do not survive. After the application of the fiber bundles, the retaining pins are then pressed from inside to outside into the fiber bundles.
  • the retaining pins into the fiber bundle applied to the connecting element from outside to inside or to press in with lateral displacement of the fiber bundles.
  • the bores have preferably been introduced into the connecting element before the fiber bundles are applied. Your position is thus known. After winding then the retaining pins are pressed from outside to inside through the fiber bundle into the holes with interference fit.
  • the retaining pins can be tapered or sharpened on the inwardly facing areas.
  • the fibers or fiber bundles can first be displaced laterally from the outside in order to provide an access channel to the connecting element, for example by means of a tube. Then, through this access - - Channel through the connecting element drilled, and then a holding pin is inserted into the bore thus produced in the connecting element from the outside to the inside with a press fit through the additional channel.
  • the method of prior drilling is preferred.
  • the free retaining pin ends are covered, preferably by a further layer of applied fiber bundles. This is possible with each of the variants of embodiments described here.
  • a connecting element as a precursor for the production of a shaft assembly with a previously described second method is hollow or has an inner space with an inner surface and a plurality of holes, in which retaining pins are pressed from the inside.
  • the retaining pins do not project beyond the outer surface of the connecting element and are in particular tapered or tapered in their end regions.
  • the retaining pins are inwardly over the inner surface of the connecting element, in particular more than half their length or even more than 75%, so clearly.
  • FIG. 1 A simple sectional view through a wind turbine with shaft arrangement between the rotor hub and generator, a shaft arrangement according to FIG. 1 enlarged in a sectional view,
  • a wind turbine 1 1 is very simplified in side section shown.
  • a rotor hub 12 is mounted as usual at the front end of a nacelle 13, which also contains a generator 14.
  • Rotor hub 12 and generator 14 are rotatably connected to each other via a shaft assembly 1 6, wherein no joints or other compensation devices are advantageously provided.
  • the shaft arrangement 1 6 is shown enlarged in side view in FIG. 2 and in an oblique view in FIG. 3 and has a shaft tube 17 which is formed over a major part of its length by a central region 18 of constant thickness and constant thickness.
  • the shaft tube 17 goes to the left via a left transition region 19a in a left conical expansion 21 a over.
  • At the right end is a mirror symmetry same education provided with a right transition region 19b and a right conical expansion 21b.
  • the shaft tube 17 consists of a fiber composite material, as is well known to those skilled in the art, ie on fiber bundles and a matrix material or epoxy resin odgl ..
  • the left-hand connection element 24a which is also shown enlarged in FIGS. 4 and 5, has a straight tube section 25a, which has a left-hand conical taper 26a to the right, that is, toward the shaft tube 17.
  • the angle of the conical taper 26a is about 10 °.
  • the wall thickness of the connecting element 24a decreases here to the right free end, but this does not have to be so.
  • the holes 27a described above are arranged in the circumferential direction along seven circular rings with the same distance from each other.
  • holes 27a are drilled perpendicular to the longitudinal central axis L, ie at an angle of 80 ° to the outer surface of the conical taper 26a. However, this need not be so, they can also be drilled at right angles into the outer surface and then stand at an angle of 80 ° to the longitudinal central axis L. In the circumferential direction 34 holes are provided on the conical taper 26a.
  • the pipe section 25a merges into a left flange 28a, where it is still a single part here.
  • a large flange plate 30 is then fastened via a plurality of screws, which can be seen from FIG. This in turn is bolted to outer holes with the rotor hub 12 or other arrangement.
  • the diameter of the Rohabitess 25 can then be about 75cm and the taper 26a at the thin end only a little over 50cm.
  • the entire shaft arrangement can be several meters long, for example - -
  • the corrugated tube 17 itself can be for example about 8m long with a central region 18 of almost 6m and an inner diameter of 40cm with a wall thickness of several cm, for example 5cm to 15cm.
  • the wall thickness of the corrugated pipe 17 decreases in the conical widenings 21 to the outside something, which is of course also due to the expanded there diameter.
  • the holes 27 may have a diameter of 1 cm to 2cm. From Fig. 5 is also good to see that at generally possible constant thickness of the conical taper 26 a there provided holes 27 a everywhere the same length.
  • a cylindrical long holding pins 32 a are used with a press fit or are taken.
  • the retaining pins 32a should be made of solid steel. According to the aforementioned diameter of the holes 27a, their diameter may be 1 cm to 2 cm and their length is 8 cm to 12 cm.
  • the shaft tube 17 is constructed by the intended fiber bundles are introduced into or between the retaining pins 32 and thus produce a layer, which then ultimately results in the conical expansion 21 a.
  • the application of the matrix material is not a problem for the expert.
  • a sleeve-like cover 34a is provided which covers the ends of the retaining pins 32a.
  • the cover 34a may be a correspondingly conically shaped metal ring, alternatively it is likewise formed from a fiber composite material and firmly fixed to the outside of the conical structure. - - Widening 21 a wound. Thus, a detachment of the fiber composite material of the shaft tube 17 can be avoided in this area.
  • the structure of the connecting elements is identical except for the right slightly smaller flange 28b.
  • Figs. 6 to 1 Different types of winding for the fiber bundles 22 on the retaining pins 32, which are represented here only by their holes 27, on the connecting element 24 and the conical taper 26 are shown in Figs. 6 to 1 1.
  • a plurality of fiber bundles 22 are wound from the outermost retaining pins 32 left to the shaft tube 17 out obliquely to the right next to it and one underlying retaining pin, then again to the right next to it and one overlying retaining pin, etc ..
  • the fiber bundles 22 are quasi from the right coming through the retaining pins 32 to the very left and then again going to the right endlessly performed, so have no free ends.
  • a winding pattern for the fiber bundles 22 is shown in which there is a deflection of the fiber bundle around each of the retaining pins 32. While the wrap angle in the upper illustration is still about 90 °, it is only about 20 ° in the lower one.
  • a winding pattern is shown, in which, starting from a retaining pin 32, two are moved to the right and one up or down to the fiber bundle 22, and again in total mirror symmetry with two fiber bundles 22.
  • a winding pattern is shown in which this is done in parallel with two fiber bundles 22.
  • the wrap angle about 50 ° to 60 °. - -
  • a winding pattern is shown, which goes from a retaining pin 32 to the right and an upward. From this starting, two retaining pins go to the right and one down, etc ..
  • the fiber bundles 22 are inclined away from the conical taper 26 or the holding pins 32, but run overall along a quasi-averaged direction parallel to the longitudinal center axis L.
  • FIG. 9 shows a winding pattern for the fiber bundles 22, in which the direction of rotation of the loop does not change starting from the very left-hand holding pin. However, per retaining pin 32 is only a relatively small wrap of 20 ° to 30 ° before.
  • a winding pattern for the fiber bundles 22 is shown, in which the Umschlingungssinn changes more often. Furthermore, the wrap angles decrease from left to right or become smaller. - -
  • FIG. 1 another winding pattern is shown, in which the fiber bundles point to the left with open ends. Furthermore, a winding pattern is shown at the top in FIG. 11, in which, as in FIG. 8 below, depending on the sense of wrap, the wrap angle is variable. In Fig. 1 1 below is a pattern as shown in Fig. 6, but in turn with fiber bundles open to the left 22nd
  • the fiber composite material with the fiber bundles 22 of the corrugated tube 17 can be connected to the connecting elements 24 or their conical sections 26 in a manifold manner and very advantageously.
  • different winding patterns can also be combined, in particular in layers or layers one above the other.
  • the conical courses are provided so that the shaft tube 17 in the central region 18 significantly reduced the above Diameter.
  • the conical shape creates a good transition between the areas of different diameters. Although this increases the wall thickness something.
  • the smaller diameter is crucial positive for a slightly lower flexural rigidity of the shaft assembly 1 6 in the central region 18 and a slightly reduced torsional stiffness.
  • torque peaks occurring suddenly between the rotor hub 12 and the generator 14 can be absorbed somewhat. As a result, the life of the parts is considerably increased and very disruptive maintenance costs are reduced.
  • Connecting elements 124a and 124b are provided, which each have identically formed conical tapers 126a and 126b and differently formed, adjoining pipe sections 125a and 125b. They are basically similar to those of the previous figures. However, these pipe sections are not of interest.
  • the holes 127a and 127b are provided, as described in principle already to the first embodiment, see there in particular also Fig 4. Unlike in the first embodiment is also additionally provided here that the wall thickness decreases significantly less sharply in the region of the conical tapering edges 126a and 126b. But this is only to illustrate the basic variations.
  • the advantage of the wall thickness variation in conical taper 126a and 126b is that it somewhat relieves the outermost end retaining pins 132 which are loaded the most, since the retaining pins yield slightly more inwardly due to the somewhat thinner wall thickness can.
  • the total thickness of the covering of fiber bundles and the wall thickness of the connecting element can generally remain approximately constant in the longitudinal direction. The covering can increase its thickness from outside to inside, for example by 20% to 40%.
  • Retaining pins for the fiber bundles are not yet shown in FIG. 12, but should in principle already be present in the bores 127a and 127b. This will be explained in more detail on the enlarged section of FIG.
  • auxiliary winding stars 136a and 136b are respectively provided on the outside of the conical tapers 126a and 126b. These are known to those skilled in the art and have a lot of protruding teeth or pins, similar to the outermost ring of retaining pins in Fig. 5 leftmost. These auxiliary winding stars 136a and 136b serve to wind up the fiber bundles according to the method described above, or they serve as reversal points, since there are still no holding pins protruding from the connecting elements 124a and 124b, to which the winding - - could be made. The winding angles can vary, and advantageously winding angles of about + -45 ° can dominate.
  • pressing devices 140a and 140b are provided on removable central support tubes 138a and 138b, respectively. They are each movable on the central support tube 138 in the longitudinal direction and in the direction of rotation. They will be explained in more detail to the enlarged view of FIG. 13.
  • the support tubes 138a and 138b respectively put on support discs 141 a and 141 b, which carry a thin support core 142, advantageously as a thin metal tube, which connects the connecting elements 124 a and 124 b through. It also carries cone adapters 143a and 143b, which provide the transition from the rectilinear extent in the central region of the shaft assembly to the tapered constrictions 126a and 126b. At the end, while the support tubes 138a and 138b including the support discs 141 and pressing devices 140 are removed, the support core 142 and the cone adapters 143a and 143b may remain therein.
  • the shaft tube 1 17, including its right-hand conical widening 121 b is already shown.
  • the fiber bundles (not shown here in detail) form the aforementioned coating on the connecting element 124b or, in particular, on the conical taper 126b.
  • the holes 127b retaining pins 132b are introduced, but from the inside and only so far that they do not protrude beyond the outer surface, so they do not break through.
  • the pressing device 140b arranged on the central support tube 138b is put into operation.
  • a pneumatically, hydraulically or mechanically operable plunger which is placed in each case exactly radially inside of the retaining pins 132b, they are pushed slowly outwards through the holes 127b.
  • these retaining pins 132b drill, as it were, through the applied covering of fiber bundles, which are pressed to the side.
  • considerable forces are necessary for this, but they can be applied by appropriate design of the pressing device 140b.
  • This displacement of the fiber bundles has the further advantage that they are here, so to speak, still compressed and an even higher strength can be achieved.
  • the fiber content can generally be at least 55% to 70%.
  • some resin or binder may leak from the top, which can be easily removed.
  • the retaining pins 132b are pressed into this as directly as possible after the application of the fiber bundles.
  • Such a retaining pin 132b is shown in an enlarged oblique view in FIG. At its end it has a tip 133 which is threaded for screwing into the pin 132, the tip being simply unscrewed at the bottom as shown in FIG - - can be.
  • a retaining pin can have an exemplary diameter of 10mm to 20mm, advantageously 18mm.
  • the tip 133 may be about 10mm to 30mm long, preferably about 20mm.
  • the entire retaining pin can be 100mm long, for example.
  • the tip 133 is rounded slightly, so that when pressed through the fiber bundles are moved as possible only to the side, but not severed or damaged.
  • a cover can be applied as shown in FIG. 5, advantageously in turn from wound fiber bundles.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Wind Motors (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne un ensemble arbre destiné à transférer des couples d'un moyeu d'une éolienne à un générateur, comprenant aux deux extrémités des éléments de liaison pour une liaison mécanique. Les éléments de liaison sont recouverts respectivement par des zones d'extrémité d'un tube d'arbre à liaison, le tube d'arbre étant composé d'un matériau composite renforcé par des fibres doté d'une pluralité de faisceaux de fibres. Les éléments de liaison présentent dans la zone recouverte par le tube d'arbre une pluralité de tiges de retenue en saillie, autour desquelles ou entre lesquelles sont posés ou s'étendent les faisceaux de fibres.
EP12721501.0A 2011-05-11 2012-05-10 Ensemble arbre et procédé de fabrication d'un ensemble arbre et élément de liaison en tant que produit semi-fini Withdrawn EP2707608A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011075688A DE102011075688A1 (de) 2011-05-11 2011-05-11 Wellenanordnung und Verfahren zur Herstellung einer Wellenanordnung
PCT/EP2012/058693 WO2012152891A1 (fr) 2011-05-11 2012-05-10 Ensemble arbre et procédé de fabrication d'un ensemble arbre et élément de liaison en tant que produit semi-fini

Publications (1)

Publication Number Publication Date
EP2707608A1 true EP2707608A1 (fr) 2014-03-19

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Country Link
US (1) US9303682B2 (fr)
EP (1) EP2707608A1 (fr)
CN (1) CN103748371B (fr)
DE (1) DE102011075688A1 (fr)
WO (1) WO2012152891A1 (fr)

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EP2743058B1 (fr) * 2012-12-13 2015-09-02 Enrichment Technology Company Ltd. Zweigniederlassung Deutschland Renforcement intégré à la structure dans des composants enroulés à base de matières composites
CN103115064A (zh) * 2013-02-28 2013-05-22 无锡市通用机械厂有限公司 回转式格栅传动系统中的主驱动轴结构
DE102013219820A1 (de) * 2013-09-30 2015-04-02 Bayerische Motoren Werke Aktiengesellschaft Faserverbundwerkstoffbauteil, Verfahren zur Herstellung eines Faserverbundwerkstoffbauteils sowie Verwendung von Faserbündeln und Verstrebungsmitteln zur Herstellung eines Faserverbundwerkstoffbauteils
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WO2012152891A1 (fr) 2012-11-15
CN103748371B (zh) 2016-05-04
CN103748371A (zh) 2014-04-23
US20140079482A1 (en) 2014-03-20
US9303682B2 (en) 2016-04-05

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