• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Impeller containing: - a central shaft or a tube (2) for mounting on a shaft; - around the shaft or tube (2) a hollow hub (3) which increases in diameter in the direction from one end (4) to the other end (5), which hub (3) has an outer side (6) and a the shaft or tube (2) facing inside (7); - a back wall (9) provided at the end (5) of the hub (3) with the largest diameter transverse to the shaft or tube (2) which at least partially closes the hollow space (10) of the hub (3) ; - a series of vanes (11) fixed with their feet (12) on the outside (6) of the hub (3); characterized in that a number of flat, straight reinforcing ribs (13) are provided which extend on the shaft or tube (2) in a substantially radial direction and form a radial connection between the shaft or tube (2) and the inner side (7) of the hub (3).
    公开号:BE1026932B1
    申请号:E20195517
    申请日:2019-08-09
    公开日:2020-07-28
    发明作者:Karolien Kempen；Gersem Hilde De；Greef Guy De
    申请人:Atlas Copco Airpower Nv；
    IPC主号:
    专利说明:

    I BE2019 / 5517 Impeller and turbocharger equipped with such impeller and method for manufacturing a impeller.
    The present invention relates to a paddle wheel for example a paddle wheel for a centrifugal machine 3 such as a turbo compressor, turbines or the like, 9 10 A centrifugal compressor element as used in 9 turbo compressors consists of a paddle wheel # rotatably mounted in a housing with a 9 axial inlet and a radial outlet, wherein the paddle wheel is formed by a kind of solid tronpet shaped hub for diverting the sucked gas from the axial direction at the inlet to the radial direction at the outlet and by paddles mounted on the hub and which together with the hub and defining the casing constricting channels through which the gas is passed to compress it. The paddle wheel is provided with a central bore for attaching the paddle wheel to a drive shaft.
    It is known that such a scraping wheel is driven at high speeds of several tens of thousands of Loers per minute, the linear peripheral speed at the outlet of the paddle wheel being able to reach several hundred meters in a second.
    N BE2019 / 5517 Due to the large centrifugal forces that occur at such high rotational speeds, very great tensions are generated in the material of the paddle wheel. 9 5 However, these stresses in a paddle wheel with a full solid hub 9 are distributed in a very uneven way. The | tension on the shoe wheel is a combination of | stresses in different directions, which are typically {multi-axisal, ie, according to different | 10 axles, for the back of the hub, that is to say: at the end of the hub with the largest diameter, # it is mainly about stresses in the radial direction and 9 in the circumferential direction. These two stress components are a result of the centrifugal forces.
    The axial stresses on the hub spine are a second order effect. The axial stresses are important for the central bore, because the blade wheel is clamped in axial direction on a shaft by means of a draw bolt. Depending on the geometry of the blade wheel, the stress gradient may vary, but most of the blade wheel is underloaded with stresses well below the elastic limit of the material from which the blade wheel is made, with the disadvantage of inefficient use of this material and unnecessary high mass of the paddle wheel, It is nevertheless important to reduce the mass of the paddle wheel to keep the natural frequency in bending of the drive shaft on which the paddle wheel is mounted high enough to allow higher rotational speed of the paddle wheel, which in itself is useful for a energy: efficient operation of a turbocharger. 9 Also, by reducing the mass of the | paddle wheel the high spamningen Len due to the | centrifugal forces, both on the central bore and on the back of the hub and on the rounding at the location of the | 10 transition back hub, to be limited. # Because of a lacere mass of the paddle wheel, moreover, the bearings of the drive shaft are less loaded, so that when designing a Lurbocompresscr, smaller bearings can be opted for, resulting in a lower cost price and / or a more compact compressor element or a drive shaft with a smaller diameter, Solutions are already known to reduce the mass of the paddle wheel, for example by applying a metal grid structure in a central part of the hub as in WO 2013/124314, but this is less able to absorb the radially directed centrifugal forces. so that the grid structure is unnecessarily strong and rigid Le in unloaded directions, resulting in a certain weight disadvantage. Another solution consists in providing a hollow hub with internal reinforcements as in US 7,2B1,301,
    These are mainly aimed at reducing inertia and are not suitable for uniformly distributing the stresses in the paddle wheel, which will lead to stress concentrations. 5 {WO 2016/127225 shows an internal structure of the 9 paddle wheel, consisting of a hollow hub with | reinforcing ribs specifically designed to absorb the 9 radial centrifugal forces, so that the # 10 stresses generated in the hub can dissipate.The reinforcing ribs extend from the hub, at the base of the blades, to on the axle or tube and do not form any kind of radial spokes. The strengthening triobes follow the curvature of the blades and are therefore themselves curved, both in their height and in their length, in order to absorb centrifugal forces in this way.
    Although such a paddle wheel can better absorb the centrifugal forces, it remains necessary to make the hub and / or reinforcement ribs thicker in some places in order to be able to absorb the stresses.
    Due to the design of such a paddle wheel, it must be manufactured by means of an additive manufacturing method. For this purpose, it is preferred to use powder bed fusion (Powder Bed Fusion), in which thermal energy is used to fuse selectively certain regions in the powder bed Le, which will allow you to 'print' all details with the necessary precision. | A property of such an additive manufacturing method is that the surface roughness of the fabricated structure will | 5 depend on the healing of the structure in question: how | judge the texture the flatter or smoother the surface. | in the paddle wheel of WO 2016/127225 the | reinforcing ribs of leaning structures, so that they are # 10 relatively rough.
    This has very adverse consequences for fatigue.
    In addition, the curved reinforcing ribs will define cavities of a relatively complex shape in the hollow hub, so that it is difficult to remove the remaining unfused powder from these cavities.
    As a result, two openings or holes must be provided per chamber in order to be able to blow and remove the powder through these holes.
    These holes are of course detrimental to the strength or stiffness of the paddle wheel, as well as to fatigue.
    Accordingly, there is still a need for a paddlewheel structure with better material utilization and smaller mass, in which centrifugal forces and axial tensioning forces are optimally absorbed and which is easy and accurate to make by an additive manufacturing method.
    The present invention seeks to provide a solution to one or more of the aforementioned and other drawbacks with respect to known paddle wheel designs | as described in the aforementioned WO 2013/124314, US 7,281,201 and WO 2016/127225. | To this end, the invention relates to a paddle wheel, comprising: | - no central axle or a tube for mounting on an axle: {- around the axle or tube a hoile hub running in the direction | 10 increases in diameter 9 from end to end, which hub has an outside and an inside facing 9 toward the shaft or tube; [- a back wall provided at the end of the hub with the largest diameter transverse to the shaft or tube that at least partially closes the hollow space of the hub: - a series of vanes placed with their foot on the outer side of the hub are fixed: characterized in that a plurality of flat straight reinforcing ribs are provided which extend on the shaft or tube in a substantially radial direction and form a radial connection between the shaft or tube and the inner side of the hub.
    # 5 By the 'substantially radial direction' in which the reinforcing ribs extend, it is meant that the ridge between the radial reinforcing ribs and the geometric centerline of the center axis or tube of the paddle wheel is a maximum of 10 degrees, and more preferably a maximum of 7 degrees and preferably a maximum of 5 degrees.
    An advantage is that such a paddle wheel, just as in WO 2016/127225, will be very light due to its hollow structure so that the paddle wheel will be able to rotate at a very high speed. Thus the turbocharger in which it | 5 paddle wheel is provided, 9 can supply more compressed air. | Another advantage is that due to the orientation of the | reinforcing ribs the internal structure is much stiffer, 9 in so that centrifugation forces are better absorbed by the | straight reinforcing ribs than in WO 2015/127225 with the 9 curved reinforcing ribs.
    This in turn has the effect or advantage that the hub or the reinforcing ribs do not | must be made thicker at certain locations to absorb the stresses occurring there.
    Moreover, the reinforcing ribs should extend straight or flat in the axial sense, so that the paddle wheel can also absorb cCeter forces in the axial direction.
    Due to the internal structure with the flat, straight reinforcement ribs, this depression is better absorbed, so that less stresses are created in the paddle wheel. Another advantage is that when manufacturing only upright structures have to be printed for the reinforcement ribs.
    This will make the surface smoother, so that less fatigue will occur.
    An additional advantage is that the chambers created by the reinforcing ribs have a simpler shape 9, so that the removal of the powder from these | 5 rooms after printing will be easier. There even | only need to provide a hole to remove the powder. Preferably, the number of reinforcing ribs is proportional to 9-12 the number of blades. | This will ensure that the paddle wheel is cyclic-symmetrical, that is, it will comprise a number of sections which repeat themselves. Also the weight will be distributed cyol-symmetrical in this way, which is necessary for balancing the paddle wheel.
    in a practical embodiment the paddle wheel is provided with at least one polygon or ring connecting all the stiffening ribs together and which is concentric with the central axis or tube.
    This polygon or ring divides the space between two successive radial reinforcement ribs into two so-called chambers.
    The polygon or ring will make the paddle wheel mechanically stronger 39 and more resistant to deformation.
    It is known that for a paddle wheel the deformation must be limited, ie, typically less than a few tenths of a millimeter. According to a preferred feature of the invention: the attachments between the reinforcing ribs and possibly the at least one polygon or ring with the rest of the 9 paddle wheel rounded,: 10 By rounding all internal edges, edges and corners | which are created by the reinforcing ribs and the | polygon, or ring, will reduce fatigue to zen minimum | The invention also relates to a turbocharger, characterized in that it is provided with a paddle wheel according to the invention.
    The advantages of such a turbocharger are directly related to the advantages of the paddle wheel according to the invention.
    For example, the turbocharger will be able to run at a higher speed compared to a turbocharger with a well-known, classic solid paddle wheel, so that more compressed air can be supplied.
    The invention relates to a method for manufacturing a paddle wheel, which method comprises the following steps:
    - providing a central shaft or a tube for mounting on a shaft; | - providing around the shaft or tube with a hollow hub | which = increases in diameter from one end to the other end, which = has an outer side and a direction towards the shaft or tube | inside; 9 - providing a back wall that is provided at the 9 end of the hub with the largest dismeter transverse to # 10 the shaft or tube that at least partially closes the hollow space of the hub: - providing a series of blades that with their feeds affixed to the outside of the hub, the method further comprising the step of providing a plurality of square, straight reinforcing ribs extending on the shaft or tube in a substantially radial direction and forming a radial connection between the shaft or tube and the inside of the hub.
    More specifically, the invention relates to a method in which the aforementioned steps are carried out by means of an additive manufacturing method.
    With the insight to better demonstrate the features of the invention, some preferred embodiments of a paddle wheel according to the invention and a turbocharger equipped therewith are described below, by way of example without any limitation, with reference to the accompanying textures, in which:
    Figure 1 schematically and in perspective represents a paddle wheel according to the invention: Figure 2 shows a cross-section according to the plane II-TIZ in | figure 1 represents; | Figure 3 represents a cross-section according to the plane TIII-III in figure 1; Figure 4 shows the view according to arrow F4 from figure 1. The paddle wheel 1 shown in Figures 1 to 4 is, by way of example, a paddle wheel of a Turbocharger. The paddle wheel 1 according to the invention, as shown in Figure 1, is very similar in external design to a conventional paddle wheel. paddle wheel 1 comprises a central tube 2 with which the paddle wheel 1 can be mounted on a drive shaft not shown in the figures for driving around the geometric centerline XX "of the tube 2 in the housing of, for example, a compressor element.
    Instead of a central tube 2, the paddle wheel 1 can also be provided with a solid shaft which can be coupled to the pre-braked drive shaft.
    The paddle wheel 21 further includes a trumpet-shaped hub 3 extending around the tube 2, which increases in diameter in the direction from one end 4 to the other end 5.
    According to the invention, the hub 3 is a hollow hub 3 with an outer side 5 and an inner side 7 facing the tube 2. This is visible in figures 2 and 3. The hub 3 connects with the end 4 with the smallest diameter to one end. Ba of the central tube 2. This end 4 is also called the axial end of the hub 3. : The hub 3 closes with the end 5 of the largest diameter | id to a back wall 9, which is visible in figures 3 and 4. 9 This end 5 also becomes the radial end of the hub 3 | mentioned.
    This substantially disc-shaped back wall 9, at the location of the other end Bb of the central tube 2, extends transversely of the tube 2 and will close or enclose the hollow space 10 between the hub 3, the tube 2 and the back wall 9.
    The outer side 6 or outer surface of the hub 3 smoothly transitions from a substantially axial direction X-X at the smallest diameter end 4 to a substantially radial direction at the largest diameter end 5.
    This formation is visible in figure 3. 23 A series of curved blades 11 is attached to the hub 3, which blades 12 are implanted with their foot 12 on the predetermined outer side 5 of the hub 3.
    In the example shown, two sets of vanes are provided, namely baffle vanes 11a, on the one hand, which extend over a certain length from the axially facing end 4 of the hub 3 to the radially directed end 5 of the hub 3 and so-called splitter vanes. ilb, on the other hand, extending between the main vanes 11a 9 over a shorter length, starting on a | 5 axial distance from the end 4 of the hub 3 to the end 5 of the hub 3, 9 However, the invention is not limited to two series of blades 1 1, but also applies to any number of {id series of blades 11 for example, where there are no 9 splitter vanes 115 or, on the contrary, 9 multiple rows of splitter vanes 1b may be provided. extend in direction and form a radial connection between the tube 2 and the fin side 7 of the hub 3. Here the reinforcing ribs 13 are connected with their foot 14 to the tube Z and with their con 15 to the inside 7 of the hub 3. The reinforcement ribs 13 in this case extend from the back wall 9 to the end 4 of the hub 3 with the smallest diameter, as can be seen in Figure 3. In other words, the reinforcing ribs 13 are along a row 16. directly connected over their height to the back wall 2,
    The reinforcing ribs 13 will divide the hollow space 10 into a number of chambers 17. In this case, the veoretric plane of the | Cut 5 reinforcing ribs 13 with the tip 18 of the scoop | 11 at the end 5 of the hub 3 with the largest | diameter. The geometric plane also refers to the geometric or imaginary extension of the reinforcing ribs 13. In this way the strengthening ribs 13 are located in the direction of the greatest centrifugal force, so that they can optimally absorb the centrifugal force.
    Moreover, the geometric centerline X-X "of the central tube Z coincides with the geometric plane of the reinforcing ribs 13. That is, the angle between the reinforcing ribs 13 and the geometric centerline X-X" of the central axis 2 is zero degrees. This is not necessary for the invention, but this angle is mazimal Lien degrees according to the invention and preferably a maximum of seven degrees and more preferably a maximum of five degrees.
    The number of reinforcing ribs 13 is not limiting to the invention and will depend, among other things, on the dimensions of the blade wheel 1. A larger blade wheel 1 will typically require more reinforcing ribs 13, since it will be subject to greater centrifugal forces due to its dimensions.
    However, the number of reinforcing ribs 13 is preferably always proportional to the number of blades 11.; This wii say, if for example there are eight main vanes 1la 9 5 and eight splitter vanes lib, there are sixteen | reinforcing ribs 13 are. This is also the case in the # shown example. For example, thirty-two reinforcing ribs 9 10 13 could also be provided. Moreover, it is also not excluded that the number of reinforcing ribs 13 is proportional to the number of main blades 11a, so that only eight reinforcing ribs 13 can also be provided.
    135 The foregoing will ensure that an oyclic-symmetrical structure is obtained, in which the paddle wheel | a number of sections 19 comprise, in the example of the figures eight sections, which are repeated each time, 26 The reinforcing ribs 13 are mainly loaded under tensile load, the full mass of the reinforcing ribs 13 being used to reduce some of the stresses of the hub 3 can be diverted to the tube 2 and possibly also to the back wall 9 and thus in the hollow space 10 of the hub 3 no or no dead, in other words no unloaded, mass is present that does not contribute to the strength of the paddle wheel 1 in radial direction.
    In this case, but not necessarily with especially smaller paddle wheels 1, the paddle wheel is! provided with one ring 20 connecting all reinforcing ribs 13 with each other connects. | 5 {It could also be more than one ring 20. In addition, instead of a ring 20, one or more polygons or a combination of polygon and circle 20 9 19 could be used. 9 In order to preserve the cyclic symmetry, the aforementioned ring 20 is concentric with the central tube 2. The ring 20 will subdivide each chamber 17 into two sub-chambers 17a, 170. The ring 20 will provide rigidity or mechanical strength and will resist deformation.
    After all, it is important that the paddle wheel 1 does not deform too much. After all, the deformation towards the inside must not be too great, in order to counteract air and air pressure losses.
    The deformation to the outside is also crucial, since there is a jacket around the blade wheel 1, whereby the rotating blade wheel 1 may not touch this jacket and other stationary parts of the compression element.
    As can be seen in the figures, the bonds between the reinforcement shaft ribs 13 and the at least one are
    == BE2019 / 5517 concentric polygon or ring 20 with the rest of the | paddle wheel 1 rounded, 9 This means that all internal edges, sides and corners 9 5 are rounded. This is important for stress concentrations | to avoid. | This will also be necessary when the paddle wheel 1 | is manufactured by a sen additive # LE fabrication method. 9 Additive manufacturing refers to a category of 9 manufacturing methods, for example by powder bed fusion (Powder Bed Fusion), in which thermal energy is applied to fuse selectively certain regions in a powder bed Le or by direct energy deposition (Direct Energy Ceposition), in which bundled thermal energy is used to melt materials while they are being deposited.
    Within the powder bed fusion category there are a number of technologies such as Electron Beam Melting (Electron Bean Melting), in which powder material is melted using an electron beam; Selective Laser Melting {Selective Laser Melting}, in which powder material is melted by means of a laser; Selective laser sintering {Selective Laser Sintering}, in which powder material is sintered using a laser The direct energy deposition category includes laser coating technology (Laser Cladding),
    In such manufacturing methods based on pcederbediusie, it is important that there are no structures with too great a slope, so that in some cases corners have to be rounded in order to avoid such slopes. 5, 9 Another consequence of such a manufacturing method is that the | hollow interior spaces and {part} chambers 17, 17a, 17k | must be connected to the environment, in order to be able to dispose of the lost goods Le.
    In this case, powder will remain in the chambers 17 and sub-chambers 17a, 17b 9 during the manufacture of the screw toror 1 by means of powder bed fusion.
    Therefore, in the example shown, the central tube 2 is provided with channels 21 which extend in the axial direction and which form a connection between the hollow space 10 of the hub 3 and the environment. The aforementioned ring 20 is also provided with passages 22, wherein at least one passage 22 is provided in each case in the part of the ring 20 which is located between two reinforcing ribs 13.
    These yarn 21 and passages 22 are preferably already provided during the manufacturing process. The powder will be able to leave the (sub) chambers via the aforementioned gales 21 and corridor 22.
    Due to the straight and flat shape of the reinforcing ribs 13 and the straight shape of the ring 20, the removal of the powder will be easy to take place by shaking with the shoe wheel 1, After the Zcho wheel 1 has been manufactured and the powder has been removed. removed, each paddle wheel 9 i is balanced.
    This means that the paddle wheel becomes 1 | measured or weighed out and that at certain locations material is removed or added until the paddle wheel 1 is in balance, that is to say: the weight is (cyclically) symmetrically distributed.
    This is very important for the functioning of the paddle wheel 1, since the smallest imbalance can lead to unwanted tensions and vibrations with all the associated adverse consequences. when mention is made of cyclic symmetric in this context, it should be noted that perfect cyclic symmetry is practically very difficult to achieve. Therefore, in the present text, this should be interpreted as "practically cyclic symmetric", which in this case context corresponds to a maximum distance between the geometric centerline of the central axis on the one hand and the intersection line of the reinforcing ribs with the back wall on the other, which is 10% of the height of the paddle wheel, In order to allow the paddle wheel 1 as much as practicable to call the coyclic- symmetry, additional material can be provided at a number of places in the paddle wheel 1, which can later be used to balance the paddle wheel, by locally removing material, as shown in figures 3 and 4. the paddle wheel Ll has a local thickening 23 of the central tube ì z to pisatse the end 8a of the tube 2.: This local thickening 22 can be designed as a | solid ring at the end 8a of the tube 2, where | 13 material can be removed from this ring, for instance 9 by drilling holes. The paddle wheel 1 also has a local thickening 24 of the back wall 3 at the location of the outer edge 25.
    In other words, this thickening 24 is located on the lccarie where the end 4 of the hub 3 with the largest diameter makes contact with the back wall 3. At this location, material can be removed for balancing, for example by milling or grinding, as already mentioned. , it can also be applied to a solid shaft instead of a tube, in which holes 21 may or may not be provided for removing powder from the space. The present invention is by no means limited to the embodiments described by way of example and shown in the figures, but a paddle wheel according to the invention and a turbocharger equipped therewith can be realized in a variety of shapes and sizes without departing from the scope of the invention.
    权利要求:
    Claims (1)
    [1]
    Conclusions. | li. ” paddle wheel containing: {5 - sen central shaft or a tube (2) for mounting on a | ash; 9 - around the shaft or tube {2} a hollow hub {3} which increases in diameter in the: direction from one end {4} to the other end 9 {5}, which hub {3) per 9 outside (60 ) has an inner side {7} facing the shaft or tube 17) 9; - pin back wall (9) provided at the end (5) of the hub {3} with the largest diameter transverse to the shaft or tube {2} which at least partially closes the hollow space {10} of the hub (3} : - a series of blades {li} fixed with their foot (12) on the outside {6} of the hub (3): characterized in that a number of flat, straight reinforcing ribs {13} are provided, which are located on the shaft or extend the tube {2} in a substantially radial direction and form a radial connection between the shaft or tube {2} and the inner side (7) of the sew {3},
    Paddle wheel according to claim 1, characterized in that the geometric plane of the reinforcement ribs {13} intersects with the tip {18} of the scoop (11) at the end (5) of the seam (3) with the largest diameter.
    3.7 Echo wheel according to claim 1 or 2, characterized in that the geometric centerline of the central axis or tube {2} coincides with the plane of the reinforcing ribs (13). 9 4. " Paddle wheel according to one of the preceding claims, | 5 characterized in that the number of reinforcing ribs {13} | is proportional to the number of vanes {11}, {5.- Vane wheel according to any of the preceding claims, characterized in that the tube or central shaft (23 | 10 is provided with holes (21) extending in the axial 9 direction and which form a connection between the hollow space (10) of the hub {3} and the environment.
    Impeller according to any one of the preceding claims, characterized in that the impeller (li) is provided with at least one polygon or ring {203 which connects all the reinforcing ribs (13) with each other and which is concentric with the central axis or tube (25, 7). Impeller according to claim 6, characterized in that the aforementioned ring {20} or polygon is provided with passages (22), wherein at least one passage {22} is provided in each case in the part of the ring (20) or polygon that is located is located between two stiffening ribs (13), B. Vane red according to any one of the preceding claims, characterized in that the blade wheel {1} has a local thickening {23} of the central axis or tube (2) at the end (Ba) of the tube (2) located at the end {4} of the hub {3} with the smallest diameter.
    Jr Impeller according to any one of the preceding claims, characterized in that the impeller {1} has a local thickening (24) of the back wall (9) at the location of | the outer rim (25). | Paddle wheel according to any one of the preceding claims, [characterized in that the reinforcing ribs (133) are directly connected to the back wall (93.9 LO]. Paddle wheel according to any one of the preceding claims, characterized in that the attachments between the | reinforcing ribs {13} and the at least one concentric polygon or ring (20) with the rest of the paddle wheel {1} are rounded.
    iz. Turbocharger, characterized in that it is provided with a paddle wheel (1) according to any one of the preceding claims. lj. A method for manufacturing a paddle wheel, which method comprises the following steps: - providing a central shaft or a tube (2) for mounting on a shaft; - providing around the shaft or tube (2) with a hollow hub (3) which increases in diameter in the direction from one end (41 to the other end {5}), which needle (3) has an outer side (6) and an inner side (7) facing the shaft or tube (2); - providing a back wall (3} which is provided at the end (5) of the pipe (3) with the largest diameter transverse to the shaft or tube ( 2) which at least partially closes off the hollow space (10) of the hub (3); | = providing a series of vanes (11) that | feel {12} on the outside {6} of the hub (3) [5] characterized in that the method further comprises the step of providing a plurality of straight, straight reinforcing ribs (13) extending on the shaft or tube (2) in a substantially radial direction and a radial 9 1G connection between the shaft or tube {2} and the | inner side (7) of the hub {3},
    148. Method according to claim 13, characterized in that the aforementioned steps are carried out by means of an additive manufacturing method.
    15.7 Method according to claim 14, characterized in that for the additive manufacturing method a powder bed fusion method is used, in which thermal energy is used to fuse selectively determined regions in a posder bed, Lé. Method according to claim 15, thereby characterized in that the step of fusion comprises the step of at least partially melting or sintering the powder material by means of an electron beam or by means of a laser. Method according to claim 14, characterized in that for the additive manufacturing method a method is applied by direct energy deposition, where
    == BE2019 / 5517 26 bundled thermal energy is used to melt materials while they are being deposited, 9 18. - Method according to claim 17, characterized in that for the method by direct energy deposition, the technology of laser cladding (laser cladding) is applied. 13. A method according to any one of claims 13 to 18 Characterized in that the method further comprises the step of providing one or more vessels {21} in the central tube {2} during the additive manufacturing process which form a connection between the hollow space (10) of the hub (3} and the surroundings.
    20, - Method according to one of claims 13 to 19, characterized in that it comprises the step to provide the paddle wheel {1} with at least one polygon or ring {20} connecting all reinforcing ribs {13} and which is concentric. with the central shaft or tube (2). 21, - Method according to claim 20, characterized in that the method further comprises the step of providing one or more passageways {22} during the additive manufacturing process, wherein at least one passageway (22) is provided in the part of the polygon or ring (20) located between two stiffening ribs (13),
    A method according to any one of claims 19 to 21, characterized in that the method further comprises, after the additive manufacturing process, the step of shaking the paddle wheel (1} to pass through said one or more 9 holes {20} and / or ( 21) to remove excess core material from the hollow space {10} of the hub (5), 9 23. Method according to claim 22, characterized in that: after removing the remaining powder, the method further comprises the step of balancing of the 9 paddle wheel {1} by removing or adding material Le at certain locations until the paddle wheel 1 is in balance.
    Method according to claim 23, characterized in that it comprises the step of providing, for the purpose of balancing, additional material during the additive manufacturing process which, after removal of the excess powder, can be locally removed around the paddle wheel {1 } to balance.
    Z25. Method according to any one of claims 14 to 24, characterized in that it comprises the step of ensuring during the manufacturing process that all internal edges, edges and corners of the paddle wheel {1} are rounded, 38
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    同族专利:
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    CN211573859U|2020-09-25|
    BE1026932A1|2020-07-23|
    BE1026931A1|2020-07-23|
    BE1026931B1|2020-07-27|
    EP3903007A1|2021-11-03|
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    法律状态:
    2020-08-26| FG| Patent granted|Effective date: 20200728 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE20185957A|BE1026931B1|2018-12-27|2018-12-27|Impeller and turbocharger equipped with such impeller|PCT/IB2019/060167| WO2020136473A1|2018-12-27|2019-11-26|Impeller and turbocompressor equipped with such impeller and method for manufacturing such an impeller|
    JP2021531370A| JP2022515981A|2018-12-27|2019-11-26|Impellers, and turbo compressors with such impellers, as well as methods for making such impellers.|
    EP19809927.7A| EP3903007A1|2018-12-27|2019-11-26|Impeller and turbocompressor equipped with such impeller and method for manufacturing such an impeller|
    CN201922389676.5U| CN211573859U|2018-12-27|2019-12-26|Impeller and turbo compressor equipped with the same|
    CN201911361350.XA| CN111379738A|2018-12-27|2019-12-26|Impeller, turbo compressor equipped with an impeller, and method for manufacturing an impeller|
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