Radial wheel for a supercharging system and a supercharging system having such a radial wheel

Abstract

The present disclosure provides a radial wheel (100) for a supercharging system, particularly a turbocharger, wherein the radial wheel (100) has a plurality of blades (120), and the plurality of blades (120) comprises a first blade (130) having a first modal behavior based at least partially on a first internal structure (131), a first external geometry (132), and a second blade (140) having a second modal behavior based at least partially on a second internal structure (141), a second external geometry (142) that is substantially identical to the first external geometry (132), and a second modal behavior based at least partially on the second internal structure (141), wherein the second modal behavior is different from the first modal behavior. The present disclosure also provides a supercharging system having such a radial wheel.

Description

Technology Field

[0001] The present disclosure relates to a radial wheel for a supercharging system, in particular a turbocharger, and a supercharging system, in particular a turbocharger, having such a radial wheel. Background Technology

[0002] Supercharging systems, particularly turbochargers, can be used to increase the output of a combustion engine. Generally, a turbine wheel can be positioned within the exhaust path of the combustion engine, and a compressor wheel can be positioned upstream of the combustion engine. Exhaust gases generated by the combustion engine can be expanded within the turbine wheel. The extracted energy can be transferred to the compressor wheel via a shaft, and the compressor wheel can compress the air supplied to the engine. By utilizing the energy of the exhaust gases to compress the air supplied to the combustion process within the combustion engine, the efficiency of the combustion process and the combustion engine can be optimized.

[0003] Typically, the compressor wheel and / or turbine wheel of a supercharger system is implemented as a radial wheel. A radial wheel according to the present disclosure also refers to a wheel having an axial flow component, generally referred to as a diagonal wheel. A radial wheel may include a plurality of lamination blades resulting in a complex external geometry.

[0004] During operation, unstable forces may act on the radial wheel, causing it to vibrate. To avoid resonance leading to excessive vibration and potential fatigue failure, the radial wheel is typically designed to have multiple modes that are well separated from one another. In traditional manufacturing, the blade can be optionally mass-tuned to dampen vibrations at relevant frequencies. However, changes in frequency resulting from variations in mass distribution by traditional manufacturing methods can also affect the flow channels formed by the blade, which is not required.

[0005] Furthermore, imbalance of the radial wheel relative to the axis of rotation can also lead to excessive vibration of the rotating shaft and potentially bearing damage or failure. Selective mass tuning of the radial wheel may also be used to balance the radial wheel relative to the axis of rotation.

[0006] Overall, modal tuning and balancing are important techniques used to ensure the safe and reliable operation of supercharging systems.

[0007] Aspects and advantages of the present disclosure may be partially described in the following description, become obvious from the description, or be learned through the practice of the disclosure.

[0008] The present disclosure provides a radial wheel for a supercharging system, particularly a turbocharger, and further provides a supercharging system, particularly a turbocharger, having such a radial wheel to enable flexible, reliable, and / or cost-effective modal tuning of one or more blades of the radial wheel.

[0009] In one example, the present disclosure provides a radial wheel for a supercharging system, particularly for a turbocharger, having a plurality of blades. The plurality of blades includes a first blade having a first internal structure and a first external geometry. The plurality of blades further includes a second blade having a second internal structure and a second external geometry. The second internal structure is different from the first internal structure. The first external geometry is substantially the same as the second external geometry. The first blade has a first modal behavior based at least partially on the first internal structure. The second blade has a second modal behavior based at least partially on the second internal structure. The second modal behavior is different from the first modal behavior.

[0010] In another example, the present disclosure provides a supercharging system having a radial wheel as disclosed herein, in particular a turbocharger.

[0011] According to another aspect, the present disclosure provides a method for modally tuning a radial wheel for a supercharging system, the method comprising the step of forming a plurality of blades, the method comprising: forming a first blade having a first internal structure, a first external geometry, and a first modal behavior based at least partially on the first internal structure; and forming a second blade having a second modal behavior, wherein the second internal structure is different from the first internal structure, a second external geometry substantially identical to the first external geometry, and a second modal behavior based at least partially on the second internal structure, the second modal behavior being different from the first modal behavior.

[0012] Details of one or more aspects of the present disclosure are described in the accompanying drawings and the following description. Other features, objects, and advantages of the technology described in the present disclosure will become apparent from the description and drawings and from the claims. Brief explanation of the drawing

[0013] A complete and feasible disclosure of the present disclosure is described in the specification with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view of a radial wheel according to an embodiment of the present disclosure. FIG. 2 is a schematic perspective view of the negative of the internal structure according to an embodiment of the present disclosure. Specific details for implementing the invention

[0014] The present disclosure generally relates to the modal tuning of one or more blades of a radial wheel, particularly a radial compressor wheel and / or a radial turbine wheel, for a supercharging system, particularly a turbocharger, through the adaptation of the internal structure of one or more blades. A radial wheel according to the present disclosure comprises a plurality of blades. At least one of the plurality of blades is at least partially hollow and comprises an internal structure used to modal tune the first blade. In some examples, the radial wheel comprises at least one blade having an internal structure having an additively manufactured support structure. A radial wheel according to the present disclosure is typically formed by a layer-by-layer process such as selective laser melting or a similar method. In some examples, the radial wheel is balanced by adapting the internal structure accordingly. Thus, the dynamic characteristics of the radial wheel and, accordingly, the entire supercharging system can be selectively adapted.

[0015] Embodiments of the radial wheel according to the present disclosure may be particularly suitable for use as a compressor wheel and / or turbine wheel for industrial applications, particularly for supercharging systems for industrial applications. Some embodiments of the radial wheel according to the present disclosure may be particularly suitable for use as a compressor wheel and / or turbine wheel for a turbocharger. Embodiments of the supercharging system and / or radial wheel according to the present disclosure may be suitable for use in the power generation industry, large off-highway vehicles, the railway industry and / or the marine industry or similar applications. The turbocharger may be a conventional turbocharger or an electrified turbocharger.

[0016] The supercharging system may include an electric machine. Such an electric-assisted supercharging system may be, for example, an e-turbine, i.e., a turbine having an electric machine for generating electrical energy from heat converted by the turbine, an e-compressor, or an e-turbocharger, i.e., an electric-assisted turbocharger. The radial wheel according to the present disclosure may be suitable for use with conventional supercharging systems and conventional turbochargers, as well as e-turbines, e-compressors, and / or electric-assisted turbochargers.

[0017] Generally, the present disclosure describes a radial wheel for a supercharging system. A preferred radial wheel may be a radial wheel for a turbocharger. A radial wheel typically has a hub portion having an outer hub face that forms a rotation axis and a gas flow passage. Generally, the hub portion is arranged rotationally symmetrically about the rotation axis. As used herein, the rotation axis corresponds to the axis around which the radial wheel rotates. The term "axial" refers to a direction along the rotation axis, and the term "radially" refers to a direction perpendicular to the axial direction. The term "radially inward" refers to a position closer to the rotation axis than the "radially outward" position. The outer hub face may be curved for radial gas flow. As used herein, the term "radial gas flow" includes a mixed flow having a radial flow component and an axial flow component. The root-end portion of the outer hub face is typically located axially on the root side and may be positioned and inclined more radially outward than the nose-end portion of the outer hub face, which is typically located axially on the nose side.

[0018] The root-end portion of the compressor wheel is generally positioned upstream along the gas flow path of the supercharger system compared to the nose-end portion, but the root-end portion of the turbine wheel is typically positioned downstream along the gas flow path of the supercharger system compared to the nose-end portion.

[0019] A radial wheel typically comprises a plurality of blades extending radially outward from a hub portion into a gas flow passage. The plurality of blades includes a first blade having a first internal structure and a first external geometry. As used herein, the term “external geometry” refers to the outer surface of the blade. Consequently, the term “internal structure” as used herein refers to the body of the blade.

[0020] The first blade has a first modal behavior based on the first internal structure. The term "modal behavior" as used herein refers to a vibration mode of a specific set of blades. A vibration mode, also referred to as a mode of vibration, generally describes a pattern of vibration of a structure, e.g., a blade of a radial wheel, and such pattern of vibration typically includes a temporal mode and a spatial mode. The temporal mode may refer to the frequency of vibration and / or the rate of damping or growth. The spatial mode may refer to different vibration amplitudes at multiple points on the structure.

[0021] A plurality of blades further comprises a second blade having a second internal structure and a second external geometry. The second internal structure is different from the first internal structure. The second blade has a second modal behavior based on the second internal structure. The second modal behavior is different from the first modal behavior. As used herein, the difference between the first modal behavior and the second modal behavior may refer to the difference between at least one, preferably a plurality of corresponding, i.e., closest vibration modes, of at least 1%, particularly at least 2%, preferably at least 5%. For example, the first mode of the first blade may differ by at least 1%, particularly at least 2%, and preferably at least 5% from the mode of the second blade (typically also the first mode of the second blade) that is closest to the first mode of the first blade. The second external geometry is substantially identical to the first external geometry, that is, the external blade geometry of the first blade and the second blade, in particular of any of the plurality of blades, is substantially identical. Accordingly, the blade channel formed by two adjacent blades and a hub portion may be independent of whether the first blade is positioned adjacent to another first blade, whether the first blade is positioned adjacent to a second blade, and / or whether the second blade is positioned adjacent to another second blade. The radial wheel may include, for example, additional blades having an external geometry different from the first external geometry and the second external geometry.

[0022] The term "substantially identical" as used herein refers, for example, that the blades differ in their external geometry within manufacturing tolerances, that is, that the blades are designed identically but may be manufactured slightly differently.

[0023] Internal structures, such as a first internal structure and / or a second internal structure, may influence the modal behavior of, for example, the blades of a radial wheel, such as the first blade and / or the second blade. For example, the blade may be partially hollow, except for an internal structure disposed within, for example, the outer surface of the blade. As previously mentioned, vibration modes include temporal and spatial modes. Typically, the vibration modes of the blade may be explicitly determined during the blade design process, for example, within a range depending on the manufacturing process and accuracy. Vibration modes may be calculated and / or determined using computer-aided simulation tools, computer-aided calculation tools, and / or others. Vibration modes are partially based on the wall thickness at each point on the blade. The specific determination of the wall thickness during the design process may be performed, for example, by determining the wall thickness at a point disposed on the micro-surface element in a direction perpendicular to the micro-surface element of the blade. Internal structures may, for example, enhance the design degrees of freedom regarding the wall thickness. In addition, external geometries such as the first external geometry and the second external geometry can be designed in an optimized manner with respect to gas flow because the design can be internally modally tuned.

[0024] Typically, the radial wheel may be an open wheel, that is, a radial wheel that does not include a shroud. In the embodiment, the blades may have their bases attached to a hub but are otherwise not connected, and in particular, are not connected to each other by a shroud.

[0025] According to an embodiment, the first internal structure and / or the second internal structure may include a hollow space formed by a hub portion and a blade shell surrounding the hollow space. Such an embodiment may enable modal tuning by selectively adjusting the blade shell thickness.

[0026] In an embodiment, the first internal structure and / or the second internal structure may include an additively manufactured support structure. The additively manufactured support structure may be adjusted to modally tune the blade. The additively manufactured support structure may be placed within a hollow space.

[0027] In some embodiments, the additively manufactured support structure may include a lattice structure and / or a triple-period minimum surface (TPMS) structure. The TPMS structure may be a diamond structure, a Schwarz P structure, or a primitive structure. Preferably, the TPMS structure may be a gyroid structure.

[0028] In the embodiments, the grid structure may have a grid constant that forms a characteristic length of the grid structure. The characteristic length may specify the distance between one grid beam and another grid beam. The characteristic length may be formed by the grid constant of the grid structure. In some embodiments, the grid structure may be permeated over at least 5%, particularly at least 10%, preferably at least 14% of the hollow space of the internal structure. As used herein, the grid structure permeated over at least 5% of the hollow space is formed by 5% of the hollow space formed by each blade shell, and the hub portion is spaced from the grid structure by the characteristic length as much as possible. The grid structure may be adjusted to modally tune the blade by adjusting the characteristic length and / or by adjusting the diameter (or thickness) of the grid beam.

[0029] According to the embodiments, the additively manufactured support structure may be non-uniform. In some examples, the density, which can be defined by the amount of the additively manufactured support structure within the hollow space, may differ for different parts of the hollow space. For example, the density may be higher in a part of the hollow space that is radially closer to the axis of rotation than in a part of the hollow space that is radially further from the axis of rotation, or vice versa.

[0030] In the embodiments, the grid structure may be uniform. In particular, one or more beams of the grid structure may have at least partially a larger diameter (or thickness) than others. The grid structure may include, for example, different distances between beams. Beams of the grid structure placed adjacent to each other may be angled with respect to one another. These embodiments facilitate highly selective modal tuning of the blade.

[0031] In the embodiments, the first internal structure and / or the second internal structure may include reinforcing elements, in particular ribs and / or webs. These embodiments may enable, for example, to selectively adjust and / or reduce vibration modes.

[0032] In the embodiments, the first internal structure and / or the second internal structure may include an internal tip edge that is adjusted to modally tune the blade. As used herein, the term “internal tip edge” may refer to an edge of a hollow space positioned at the radially outermost position. The internal tip edge may be freely shaped, for example, in relation to a spline ratio geometry. The tip edge of the blade may optionally have different distances to the internal tip edge in a direction perpendicular to the axis of rotation. The internal tip edge may form different opening angles, that is, the blade shell may have different blade shell thicknesses along the tip edge and / or the blade shell thickness may optionally decrease and / or increase along the internal tip edge in a direction toward the hub portion. Such embodiments may enable selective tuning of a plurality of vibration modes.

[0033] According to an embodiment, the first internal structure may include a first internal tip edge, and the second internal structure may have a second internal tip edge. The first internal tip edge may be different from the second internal tip edge.

[0034] In some embodiments, the first internal structure or the second internal structure may be substantially solid. The term “substantially solid” as used herein refers, for example, to a blade designed not to include a hollow space.

[0035] According to an embodiment, a plurality of blades may each have a first internal structure like a first blade and a second internal structure like a second blade, and may be additionally arranged with a pattern for one or more of the plurality of blades. When the first internal structure is referred to as "A" and the second internal structure is referred to as "B", the irregular pattern for a radial wheel having eight blades arranged on a hub portion may be, for example, "AABABBAB", "BAABBABA", or similar. The number of blades having the first internal structure may be different from the number of blades having the second internal structure.

[0036] In some embodiments, a plurality of blades are arranged in an "AB" and / or "AABB" pattern.

[0037] According to an embodiment, a plurality of blades may include a third blade having a third internal structure and a third external geometry. The third internal structure may be different from the first internal structure and the second internal structure. The third external geometry may substantially correspond to the first external geometry and the second external geometry. According to an embodiment, at least four different internal structures, e.g., a first internal structure, a second internal structure, a third internal structure, and a fourth internal structure, may be provided within a single radial wheel. Such an embodiment may reduce the risk of one blade of the radial wheel being excitable through another blade during the operation of the radial wheel.

[0038] Imbalance can occur, for example, due to the internal structure. For instance, the gyroid structure may not possess the number of blades of the radial wheel and cyclic symmetry. Imbalance can also occur for other reasons. In some examples, the center of gravity of the radial wheel and / or one or more blades is positioned at a specific location, for instance, axially.

[0039] In an embodiment, the first blade may further have a first mass distribution based at least partially on the first internal structure. The second blade may further have a second mass distribution based at least partially on the second internal structure. The first mass distribution and the second mass distribution may be formed to balance the radial wheel with respect to the axis of rotation of the radial wheel. Such an embodiment may provide a dedicated mass distribution that enables compensation of imbalance and / or adjustment of the center of gravity of the radial wheel and / or one or more blades. Such an embodiment may improve the durability of the radial wheel because less material needs to be removed to balance the radial wheel.

[0040] According to an embodiment, the first mass distribution may be substantially the same as the second mass distribution.

[0041] In an example, the first mass distribution may be substantially identical to the second mass distribution mirror-symmetric with respect to the mirror axis.

[0042] According to an embodiment, the first mass distribution and the second mass distribution may be formed such that the balancing of the radial wheel with respect to the axis of rotation is partially based on a pattern for one or more of the plurality of blades having a first internal structure and a second internal structure, respectively.

[0043] In the embodiments, the radial wheel may be integrally formed by a layer-by-layer process from one or more types of powder, particularly one or more types of metal powder. For example, when forming a radial compressor wheel, titanium alloy powder and / or aluminum alloy powder may be used. When forming a radial turbine wheel, nickel alloy powder may typically be used. The radial wheel may be manufactured, for example, by a selective laser melting process.

[0044] According to an embodiment, the radial wheel may be a radial compressor wheel. In an embodiment, the radial wheel may be a radial turbine wheel.

[0045] Now, some examples will specifically refer to embodiments of the present disclosure illustrated in the drawings. Each example may be provided as an explanation of the present disclosure, not as a limitation of the present disclosure. For example, features illustrated or described as part of an embodiment may be used in combination with other embodiments to create another embodiment. The drawings may not be in actual scale.

[0046] FIG. 1 is a schematic cross-sectional view of a radial wheel (100) according to an embodiment of the present disclosure. The radial wheel (100) may be a radial compressor wheel or a radial turbine wheel. The radial wheel (100) may be manufactured using a layer-by-layer process such as selective laser melting or a similar method.

[0047] A radial wheel (100) can be used in a supercharging system, for example, a turbocharger. The radial wheel (100) includes a hub portion (110) that includes an outer hub face (114). A gas flow passage (116) may be formed by the outer hub face (114). The hub portion (110) may have a larger diameter at the root side (103) than at the nose side (102) of the radial wheel. The outer hub face (114) may be curved for radial gas flow and / or diagonal gas flow.

[0048] The radial wheel (100) may include a plurality of blades (120) that can be disposed on an outer hub surface (114). The plurality of blades (120) may extend radially outward from the hub portion (110) into a gas flow passage (116). During the operation of the supercharging system, the operating environment of the radial wheel (100), such as gas flow, may cause the plurality of blades (120) to vibrate.

[0049] The radial wheel (100) has a first blade (130) having a first internal structure (131). The first modal behavior of the first blade (130) is partially based on the first internal structure (131). The first blade (130) has a first external geometry (132).

[0050] The radial wheel (100) further has a second blade (140) having a second internal structure (141) different from the first internal structure (131). The second blade (140) has a second external structure (142) substantially identical to the first external structure (132). The second blade (140) has a second modal behavior different from the first modal behavior.

[0051] The first internal structure (131) includes a first hollow space (134) and a first blade shell (135). A first laminated support structure (136) is disposed within the first hollow space (134). The first laminated support structure (136) is a first lattice structure. The laminated support structure (136) is non-uniform. In some embodiments, the laminated support structure (136) may be uniform. The first internal structure (131) further includes a first internal leading edge (133).

[0052] The second internal structure (141) includes a second laminated support structure (146) disposed within a second hollow space (144). The second hollow space (144) is formed by a second blade shell (145) and an outer hub face (114). The second laminated support structure (146) is a second lattice structure. The second laminated support structure (146) is different from the first laminated support structure (136).

[0053] For example, the characteristic length of the first grid structure is greater than the characteristic length of the second grid structure. The second internal structure (141) includes a second internal tip edge (143). The second internal tip edge (143) is designed differently from the first internal tip edge (133). In particular, the first internal tip edge (133) follows a path based on the first tip edge (137) of the first blade (130). The second internal tip edge (143) has varying distances along the second tip edge (147) toward the second tip edge (147) of the second blade (140) in a direction toward the hub portion (110).

[0054] The radial wheel (100) may further include a third blade (not shown) comprising a third internal structure. The third blade has a third external geometry substantially identical to the first external geometry (132) and the second external geometry (142). The third blade has a third modal behavior different from the first modal behavior and the second modal behavior. The third internal structure includes a third blade shell and a third hollow space. A third laminated support structure is disposed within the third hollow space. The third laminated support structure is a gyroid structure.

[0055] Additionally, the radial wheel (100) may include a solid fourth blade (not shown). The fourth blade has a fourth outer geometry that is substantially identical to the first outer geometry (132), the second outer geometry (142), and the third outer geometry.

[0056] A plurality of blades (120) of the radial wheel (100) are arranged in a predetermined pattern. The pattern is an "ABCD" pattern, where "A" refers to the first blade (130), "B" refers to the second blade (140), "C" refers to the third blade, and "D" refers to the fourth blade.

[0057] The first blade (130) has a first mass distribution based at least partially on the first internal structure (131). The second blade (140) has a second mass distribution based at least partially on the second internal structure (141). The third blade has a third mass distribution based at least partially on the third internal structure. The fourth blade has a fourth mass distribution. The first mass distribution, the second mass distribution, the third mass distribution, and the fourth mass distribution are formed to balance the radial wheel (100) with respect to the axis of rotation (101). In particular, the balancing of the radial wheel (100) is based partially on the pattern.

[0058] FIG. 2 schematically illustrates how the negative of the internal structure (131, 141) according to an embodiment of the present disclosure looks similar. For example, the internal structure (131, 141) may be similar to the first internal structure (131) of the first blade (130) or the second internal structure (141) of the second blade (140) described in relation to FIG. 1.

[0059] The internal structure (131, 141) includes a reinforcing element (160). In particular, the internal structure (131, 141) includes a web (161) and a rib (162). The modal behavior of the blade (130, 140) can be optionally adjusted by providing the web (161) and / or rib (162) at a predetermined position.

[0060] The reinforcing element (160) can also be formed to balance the radial wheel (100) with respect to the rotation axis (101).

[0061] The internal structure (131, 141) further includes an internal tip edge (133, 143). The internal tip edge (133, 143) may be formed to selectively adjust the modal behavior of the blade (130, 140). Additionally, the internal tip edge (133, 143) may be formed to balance the blade (130, 140).

[0062] Accordingly, the radial wheel has been presented in the foregoing description with reference to specific examples. It should be understood that the various embodiments disclosed herein may be combined in combinations different from the specific combinations shown in the accompanying drawings. It will be understood that various modifications to the referenced examples may be made within the scope of this disclosure and the following claims. Explanation of the symbols

[0063] 100 Radial wheel 101 rotation axis 102 Nose side 103 Root side 110 hub part 114 outer hub surface 116 Gas flow passage 120 Blades of the Void 130 1st Blade 131 First internal structure 132 First external geometric structure 133 1st inner leading edge 134 First hollow space 135 1st Blade Shell 136 First laminated support structure 137 1st tip edge 140 2nd Blade 141 Second internal structure 142 Second external geometry 143 2nd inner leading edge 144 Second Hollow Space 145 2nd Blade Shell 146 Second laminated support structure 147 Second tip edge 160 Reinforcement elements 161 Web 162 Liv

Claims

Claim 1 A radial wheel (100) for a supercharging system, particularly a turbocharger, comprises a plurality of blades (120), and the plurality of blades (120) As the first blade (130), First internal structure (131), First external geometric structure (132), and Having a first modal behavior based at least partially on the first internal structure (131), 1st blade (130); and As a second blade (140), A second internal structure (141) that is different from the first internal structure (131), A second external geometric structure (142) substantially identical to the first external geometric structure (132), and A second modal behavior based at least partially on a second internal structure (141), wherein the second modal behavior has a second modal behavior that is different from the first modal behavior. Radial wheel (100) including a second blade (140). Claim 2 In claim 1, the radial wheel (100) comprises a first internal structure (131) and / or a second internal structure (141) including a laminated support structure (150). Claim 3 In paragraph 2, the laminated support structure (150) comprises a grid structure; in particular, the grid structure is formed over at least 5%, particularly, at least 10%, preferably at least 14% of the hollow space of the internal structure (131, 141), a radial wheel (110). Claim 4 In any one of paragraphs 2 to 3, the laminated support structure comprises a triple cycle minimum surface (TPMS) structure, particularly a gyroid structure, a radial wheel (110). Claim 5 In any one of paragraphs 2 to 4, the laminated support structure (150) is a non-uniform radial wheel (100). Claim 6 In any one of claims 1 to 5, the first internal structure (131) and / or the second internal structure (141) comprises reinforcing elements (160), particularly a web (161) and / or ribs (162), in a radial wheel (100). Claim 7 A radial wheel (100) according to any one of claims 1 to 6, wherein the first internal structure (131) includes a first internal tip edge (133) and the second internal structure (141) includes a second internal tip edge (143) different from the first internal tip edge (133). Claim 8 In any one of claims 1 to 7, the radial wheel (100) is substantially solid, with the first internal structure (131) or the second internal structure (141). Claim 9 A radial wheel (100) in which, in any one of claims 1 to 8, a plurality of blades (120) each have a first internal structure (131) and a second internal structure (141), and one or more of the blades (120) further include an irregular pattern. Claim 10 In any one of claims 1 to 9, the first blade (130) further has a first mass distribution based at least partially on the first internal structure (131), and the second blade (140) further has a second mass distribution based at least partially on the second internal structure (141), and the first mass distribution and the second mass distribution are formed to balance the radial wheel (100) with respect to the axis of rotation of the radial wheel (100), the radial wheel (100). Claim 11 In paragraph 10, the radial wheel (100), wherein the first mass distribution is substantially identical to the second mass distribution; or the first mass distribution is substantially identical to the second mass distribution mirror-symmetric with respect to the mirror axis. Claim 12 In any one of claims 10 to 11, the radial wheel (100) is formed such that the first mass distribution and the second mass distribution are formed such that the balancing of the radial wheel (100) with respect to the axis of rotation is partially based on the number of blades (120) and / or the pattern of one or more of the blades (120) having a first internal structure (131) and a second internal structure (141), respectively. Claim 13 In any one of claims 1 to 12, the radial wheel (100) is integrally formed by a layered process from one or more types of powder, in particular. Claim 14 In any one of paragraphs 1 to 13, the radial wheel (100) is a radial compressor wheel or a radial turbine wheel. Claim 15 A supercharging system having a radial wheel (100), particularly a radial wheel (100) according to any one of claims 1 to 14, particularly a turbocharger, wherein the radial wheel (100) comprises a plurality of blades (120), and the plurality of blades (120) As the first blade (130), First internal structure (131), First external geometric structure (132), and Having a first modal behavior based at least partially on the first internal structure (131), 1st blade (130); and As a second blade (140), A second internal structure (141) that is different from the first internal structure (131), A second external geometric structure (142) substantially identical to the first external geometric structure (132), and A second modal behavior based at least partially on a second internal structure (141), wherein the second modal behavior has a second modal behavior that is different from the first modal behavior. A supercharger system including a second blade (140).

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