Bearing system for rotary atomizer

Abstract

The invention relates to a bearing system for a drive turbine of a rotary atomizer (1), having a rotatable turbine shaft (3) for receiving a bell cup (2) for spraying a coating material, radial bearings (13-15) for rotatably supporting the turbine shaft (3), which radial bearings comprise at least one foil bearing (12) or a spiral groove bearing.

Description

Technical Field

[0001] This invention relates to a bearing system for a drive turbine of a rotary atomizer. Background Technology

[0002] In painting equipment used for modern motor vehicle body parts, a rotary atomizer is typically used as the application device. A so-called bell cup rotates at high speed, causing the paint to be sprayed to swirl from the edge of the bell cup. The bell cup is driven by a compressed air turbine with a rotatably mounted turbine shaft at its end, at which the bell cup is supported. The turbine shaft is typically supported by an air hydrostatic bearing.

[0003] One drawback of using hydrostatic air bearings to support the turbine shaft is the need for high-purity compressed air, i.e., low oil content and small number and size of solid particles.

[0004] Another known drawback of air bearings is their sensitivity to impact forces.

[0005] Furthermore, known air bearings only have limited emergency operating capabilities.

[0006] For the technical background of this invention, reference should also be made to US 2003 / 0169951 A1, US9,970,481B1 and the Wikipedia articles “spiral groove bearings” and “foil bearings”. Summary of the Invention

[0007] Therefore, the objective of this invention is to create an improved bearing system for supporting the turbine shaft in a rotary atomizer.

[0008] According to the main claim of the invention, this task is accomplished by a bearing system.

[0009] First, according to the prior art, the bearing system according to the invention includes a rotatable turbine shaft for receiving a bell cup that can be screwed to the end of the turbine shaft, as is known from the prior art itself.

[0010] Furthermore, according to the prior art, the bearing system according to the present invention also includes at least one radial bearing for rotatably supporting the turbine shaft.

[0011] The present invention is characterized in that the radial bearing comprises at least one foil bearing. Such foil bearings are known in the prior art. For example, see the Wikipedia article "foil bearing". However, no one has yet proposed using such a foil bearing to support the turbine shaft in a rotary atomizer. Its particularity lies in the fact that the atomizer turbine has a wide operating range in terms of speed and low available starting torque.

[0012] Alternatively, a radial bearing can be formed from at least one spiral groove bearing, which is also known as a spiral groove bearing.

[0013] In a preferred embodiment of the invention, the foil bearing first includes a cover foil, which is substantially cylindrical or free-form and surrounds the turbine shaft.

[0014] Furthermore, the foil bearing preferably includes an elastic foil that is substantially cylindrical and at least partially surrounds the cover foil, wherein the elastic foil exerts a radially inward spring force on the cover foil.

[0015] For example, the surface hardness of the elastic foil can be 10. 9 N / m 3 It may vary by ±50%, ±25%, ±10%, or ±5%.

[0016] Furthermore, the foil bearing preferably has a bearing housing that is externally wrapped with an elastic foil, wherein the elastic foil is supported outside the bearing housing and pressed radially inward onto the cover foil. For example, the bearing housing may be cylindrical or may have multiple arcs.

[0017] For example, elastic foil can be formed into a metal mesh, into a corrugated foil with protruding bumps, into a metal foil with an arc-shaped structure, or into an elastomer foil, to name just a few.

[0018] In addition, it should be mentioned that although other manufacturing methods are possible, flexible foil can be manufactured by etching.

[0019] In addition, it should be mentioned that the cover foil can be coated with a friction-reducing coating on one side (i.e., the inside) of the turbine shaft to reduce friction and wear during operation.

[0020] Furthermore, it should be mentioned that bearing housings and cover foils can have different radii distributed in the circumferential direction, which is well known, for example, from hydrodynamic bearings.

[0021] The turbine shaft is preferably mechanically driven by a compressed air turbine having a rotatable turbine impeller. For this purpose, the compressed air turbine has a drive air supply source to provide drive air to drive the turbine impeller. Furthermore, the compressed air turbine has an exhaust guide structure for discharging the expanded drive air from the compressed air turbine, which is itself known in the prior art.

[0022] In this case, the supplied drive air and / or discharged air can also be partially guided through the foil bearing, for example, radially from the outside to the inside. For this purpose, the drive air supply source can branch off a portion of the drive air and guide it through the foil bearing.

[0023] In addition, the expanded drive air from the exhaust guide structure can also be guided through the foil bearing, for example, through the foil bearing in the axial direction.

[0024] Therefore, the elastic foil, cover foil, and / or bearing housing may have radial through holes to allow branched drive air to be transmitted radially from the outside to the inside.

[0025] In a preferred embodiment of the invention, the radial bearing includes not only foil bearings, but at least two foil bearings that are axially adjacent to or spaced apart from each other. For example, it is possible to provide a spacer ring between adjacent foil bearings.

[0026] For example, the two foil bearings can also be arranged on different sides of the turbine impeller of the compressed air turbine. Conversely, in another embodiment of the invention, the two foil bearings are located on the same side of the turbine impeller of the compressed air turbine.

[0027] The above description essentially pertains to the design of a radial bearing as a foil bearing. Furthermore, the bearing system according to the invention preferably has an additional thrust bearing to support the turbine shaft in the axial direction. This thrust bearing is preferably designed as an aerodynamically driven helical groove bearing, which is known in the prior art. For example, refer to the Wikipedia article "Helical Groove Bearing".

[0028] Therefore, the helical groove bearing preferably first comprises a rotating disk that is rotationally rigidly connected to the turbine shaft and rotates together with the turbine shaft during operation. Furthermore, the helical groove bearing also includes a first fixed disk fixed to the bearing system, wherein the rotating disk and the first fixed disk are adjacent to each other in a substantially parallel manner. The end face of the first fixed disk preferably has helical grooves, which is known in conventional helical groove bearings.

[0029] In a preferred embodiment of the invention, the helical groove bearing further includes a second fixed disk, which is fixedly arranged in the bearing system, with the rotating disk and the second fixed disk adjacent to each other in a substantially parallel manner. The end face of the second fixed disk on one side of the rotating disk or the fixed disk also has multiple helical grooves, which is known in conventional helical groove bearings and therefore does not require detailed description.

[0030] The two fixed discs are preferably preloaded on each other in the axial direction, i.e., pressed together by at least one spring.

[0031] Preferably, there is a spacer (e.g., a spacer bolt) between the two fixed discs, which adjusts the axial distance between the two fixed discs to reduce starting friction.

[0032] The rotating disc of the aforementioned helical groove bearing can be formed, for example, from a turbine impeller, or connected to the turbine impeller in a way that resists relative torsion. In a preferred embodiment of the invention, the helical groove bearing is arranged on both sides of the turbine impeller. In this way, the thrust bearing also serves as a seal, reducing turbine leakage losses.

[0033] In one variation of the invention, the bearing housing of the foil bearing has an inner cross-section that is substantially constant in the axial direction, while the cover foil of the foil bearing has an inner cross-section that tapers in the circumferential direction to form a plurality of wedges. This can be achieved by the shape of the bearing housing and the elastic foil.

[0034] On the other hand, in another variation of the invention, both the bearing housing and the cover foil of the foil bearing have an inner cross section that tapers, particularly tapering, in the axial direction toward the bell cup.

[0035] Generally speaking, it should be mentioned that the bearing system according to the invention preferably generates heating power during operation through frictional heat, the power being at least 50W, 100W, 200W or 300W, in order to avoid condensation in the bearing system.

[0036] In addition, it should be mentioned that the elastic foil of the foil bearing allows for a certain radial spring travel, while the elastic foil has a certain support diameter. The ratio of spring travel to support diameter is preferably less than 0.1, 0.05, 0.01, 0.005 or 0.0033.

[0037] In addition, it should be noted that the bearing system may include a labyrinth seal for sealing the rotatable turbine shaft. The labyrinth seal is preferably circumferentially surrounding the turbine shaft and arranged at the distal end of the turbine shaft, i.e., before the possible mounting position of the bell cup.

[0038] In the bearing system according to the invention, the radial bearing can be a hydrostatic air bearing, wherein the supplied compressed air establishes an air cushion for the bearing. However, in another case, the radial bearing can also be a hydrodynamic air bearing, wherein the air cushion of the bearing is generated by the movement of the air bearing.

[0039] Finally, it should be mentioned that this invention does not only claim protection for the aforementioned bearing system. Rather, this invention also claims protection for rotary atomizers having such a bearing system for supporting the turbine shaft. Attached Figure Description

[0040] Other advantageous embodiments of the invention are pointed out in the dependent claims, or explained in more detail below together with the description of preferred embodiments of the invention and with reference to the accompanying drawings.

[0041] Figure 1 A schematic cross-sectional view of a rotary atomizer according to the invention is shown;

[0042] Figure 2 yes Figure 1 Front view of the mounting plate of the spiral groove bearing of a rotary atomizer;

[0043] Figure 3A This is a schematic cross-sectional view of another embodiment of the rotary atomizer according to the present invention;

[0044] Figure 3B yes Figure 3A A magnified detailed view;

[0045] Figure 4A It shows according to Figure 3A A variation of an embodiment;

[0046] Figure 4B yes Figure 4A Enlarged detailed view;

[0047] Figure 5 This is a simplified schematic cross-sectional view of the foil bearing according to the present invention;

[0048] Figure 6 It shows Figure 5 A variant of the foil bearing;

[0049] Figure 7 A schematic cross-sectional view of a spiral groove bearing used as a thrust bearing is shown;

[0050] Figure 8-10 It shows according to Figure 1 Various variations of the embodiments. Detailed Implementation

[0051] Figure 1 A simplified schematic diagram of a rotary atomizer 1 according to the invention is shown, which can be used, for example, to dispense paint in a spraying system for painting motor vehicle bodies. For this purpose, the rotary atomizer 1 includes a bell cup 2 mounted on a turbine shaft 3 and rotating at high speed about a rotation axis 4 during spraying operations.

[0052] The rotary atomizer 1 is typically driven by a compressed air turbine with a turbine impeller 5 extending radially from the turbine shaft 3, its end having turbine blades 6. In operation, the turbine impeller 5 with turbine blades 6 is actuated by drive air supplied by an air supply source 7. In the rotary atomizer 1, a drive air line 8 branches off from the air supply source 7 and is directed to the turbine blades 6.

[0053] In the axial direction, the turbine impeller 5 is adjacent to two fixed mounting discs 9 and 10. These two fixed mounting discs are parallel to the end face plane of the turbine impeller 5 and together with the turbine impeller 5 form a helical groove bearing for axial support of the turbine shaft 3. For this purpose, both mounting discs 9 and 10 have helical grooves 11 on the side facing the turbine impeller 5, such as... Figure 2 As shown, refer to fixed plate 9. The two fixed plates 9 and 10 thus form a thrust bearing together with the turbine impeller 5 within the rotary atomizer 1.

[0054] Furthermore, the rotary atomizer 1 also includes a radial bearing for supporting the turbine shaft 3. The radial bearing is designed as a foil bearing 12 and includes a cover foil 13, a resilient foil 14, and a bearing housing 15, which is formed from the atomizer housing. The resilient foil 14 is installed between the bearing housing 15 and the cover foil 13. The resilient foil 14 is supported on the outside of the bearing housing 15 and presses the cover foil 13 inward. The structure and operation of the foil bearing 12 are known in principle in the prior art and therefore do not require detailed description.

[0055] A new advantage of using foil bearing 12 in rotary atomizer 1 is its lower sensitivity to the effects of similar impact forces.

[0056] It should be mentioned here that the bearing air line 16 branches off from the air supply source 7 in order to introduce a portion of the drive air radially from the outside to the inside into the foil bearing 12.

[0057] In addition, it should be mentioned that the rotary atomizer 1 has a labyrinth seal 17 at the far end of the turbine shaft, but within the rotary atomizer 1.

[0058] Figure 3A and 3B A cross-sectional view is shown through another embodiment of the rotary atomizer 1 according to the invention, which is generally similar to the one described above and Figure 1 and 2 The embodiments described herein correspond to the examples described above; therefore, to avoid repetition, the corresponding details are referred to using the same reference numerals as described above.

[0059] A distinctive feature of this embodiment is that two foil bearings 12.1 and 12.2 are provided to support the turbine shaft 3. In this case, the two foil bearings 12.1 and 12.2 are arranged adjacent to each other in the axial direction, and only the air gap 18 is closed between them. The function of the air gap 18 will be described in detail below.

[0060] The two foil bearings 12.1 and 12.2 each have bearing housings 15.1 and 15.2, respectively, wherein the two bearing housings 15.1 and 15.2 each have radially extending through holes 19.1 and 19.2 to allow bearing air supplied via bearing air line 16 to pass radially through the bearing housings 15.1 and 15.2, as indicated by the arrows. The supplied bearing air can then be discharged again through air gap 18, as indicated by the arrows.

[0061] Figure 4A and 4B It shows according to Figure 3A and 3B Variations of the embodiments described above are therefore referenced to avoid repetition. Figure 3A and 3B The description is as follows. One feature of this embodiment is that two foil bearings 12.1 and 12.2 are arranged on different sides of the turbine impeller 5.

[0062] In addition, from Figure 4B As can be seen, some of the expansion exhaust gas from the compressed air turbine can be guided through foil bearings 12.1 and 12.2.

[0063] Figure 5 A simplified schematic cross-sectional view of the foil bearing 12 according to the invention is shown, which is generally consistent with the embodiment of the foil bearing 12 described above. Therefore, to avoid repetition, reference is made to the preceding description, and the corresponding details are referred to using the same reference numerals.

[0064] According to Figure 5 In one embodiment, both the bearing housing 15 and the cover foil 13 have an inner cross section that tapers in the axial direction toward the bell cup 2.

[0065] According to Figure 6 In one embodiment, the bearing housing 15 has an inner cross-section that remains substantially unchanged in the axial direction. However, here, the cover foil 13 has an inner cross-section that tapers in the axial direction toward the bell cup 2.

[0066] at last, Figure 7 Other embodiments of the spiral groove bearing for turbine shaft 3 according to the present invention are shown, which partially correspond to the embodiments described above. Therefore, to avoid repetition, reference is made to the above description, and the corresponding individual items are referred to by the same reference numerals.

[0067] The spiral groove bearing here includes a rotating disk 20 that extends radially from the turbine shaft 3 and rotates together with the turbine shaft 3.

[0068] On both sides of the rotating disk 20 are two parallel fixed disks 21 and 22, which are parallel to the end face plane of the rotating disk 20, and each contains a helical groove, as can be seen from the conventional helical groove bearing itself.

[0069] The axial distance between the two fixed discs 21 and 22 is adjusted by the spacer bolts 23 to reduce starting friction.

[0070] It should be mentioned here that the two fixed disks 21 and 22 are preloaded by two springs 24 and 25, that is, the two springs 24 and 25 press the two fixed disks 21 and 22 against the rotating disk 20.

[0071] Figure 8-10 It shows according to Figure 1 Various variations of the embodiments are described above with reference to avoid repetition, and the corresponding details are referred to by the same reference numerals.

[0072] According to Figure 8 In the variant, a special feature is that the spiral groove bearing 26 is used as a thrust bearing, while the radial bearing is formed by another spiral groove bearing 27.

[0073] According to Figure 9 In the variant, a special feature is that the foil bearing 28 is used as a thrust bearing, while the radial bearing is formed by a spiral groove bearing 29.

[0074] According to Figure 10 In the variant, a special feature is that the foil bearing 30 is used as a thrust bearing, while the radial bearing is also formed by the foil bearing 31.

[0075] Therefore, the present invention allows any combination of spiral groove bearings and foil bearings to be used as thrust bearings or radial bearings.

[0076] This invention is not limited to the preferred embodiments described above. Instead, numerous variations and modifications are possible, which also utilize the spirit of this invention and are therefore within its scope of protection. In particular, this invention also claims protection for the subject matter and features of the dependent claims, which are independent of the claims mentioned in each example, and especially lack features of the main claim. Therefore, this invention includes different aspects of the invention, each of which is independently protected.

[0077] List of reference numerals

[0078] 1. Rotary atomizer

[0079] 2 bell cups

[0080] 3 turbine shaft

[0081] 4. The axis of rotation of the bell cup

[0082] 5. Turbine impeller and rotating disk with helical groove bearing

[0083] 6 turbine blades

[0084] 7. Air supply source for drive air and bearing air

[0085] 8. Drive air lines

[0086] 9 and 10 The fixing disc of the spiral groove bearing

[0087] 11. Spiral grooves on the fixed disc of the spiral groove bearing

[0088] 12, 12.1, 12.2 Foil bearings used to support the turbine shaft

[0089] 13, 13.1, 13.2 Cover foil

[0090] 14, 14.1, 14.2 Elastic foil

[0091] 15, 15.1, 15.2 Bearing housings

[0092] 16 Bearing Air Line

[0093] 17. Labyrinth-style sealing device

[0094] 18. Air gap between two bearing foils

[0095] 19.1, 19.2 Through holes on the bearing housing for supplying air to the bearing.

[0096] 20 Rotary disk with spiral groove bearing

[0097] 21, 22 The fixing disc of the spiral groove bearing

[0098] 23. Spacing bolts between the fixed discs of the spiral groove bearing

[0099] 24 and 25 are springs used for axial preload on the mounting plate of the spiral groove bearing.

[0100] 26 Spiral groove bearings used as thrust bearings

[0101] 27. Helical groove bearings as radial bearings

[0102] 28. Foil bearings used as thrust bearings

[0103] 29. Helical groove bearings as radial bearings

[0104] 30 Foil bearings used as thrust bearings

[0105] 31 Foil bearings as radial bearings

Claims

1. A bearing system for a drive turbine of a rotary atomizer (1) for applying coatings, having a) A rotatable turbine shaft (3) for receiving a bell cup (2) for spraying paint; and b) A radial bearing for rotatably supporting the turbine shaft (3). wherein The radial bearing includes at least one foil bearing (12, 12.1, 12.2) or a spiral groove bearing (27, 29). c) A compressed air turbine having a rotatable turbine impeller (5) for driving the turbine shaft (3). b) A drive air supply source (7, 8) for supplying drive air to drive the turbine impeller (5); and c) An exhaust guiding structure for discharging expanded drive air from the compressed air turbine. Its features are, e) A portion of the drive air supply to the compressed air turbine branches off and guides this portion of drive air through the foil bearings (12, 12.1, 12.2); and / or f) The exhaust guiding structure of the compressed air turbine guides the expanded drive air at least partially through the foil bearings (12, 12.1, 12.2).

2. The bearing system according to claim 1, characterized in that, The foil bearings (12, 12.1, 12.2) include: a) Cover foil (13, 13.1, 13.2), which is generally cylindrical and surrounds the turbine shaft (3). b) An elastic foil (14, 14.1, 14.2), generally cylindrical and at least partially surrounding the cover foil (13, 13.1, 13.2), the elastic foil (14, 14.1, 14.2) exerting a radially inwardly oriented spring force on the cover foil (13, 13.1, 13.2); and c) Bearing housings (15, 15.1, 15.2) which are externally wrapped with the elastic foil (14, 14.1, 14.2), the bearing housings (15, 15.1, 15.2) being cylindrical or having multiple arcs.

3. The bearing system according to claim 2, characterized in that, The elastic foils (14, 14.1, 14.2) have approximately 1 10 9 N / m 3 ±50% surface hardness.

4. The bearing system according to claim 2, characterized in that, The elastic foils (14, 14.1, 14.2) have approximately 1 10 9 N / m 3 ±25% surface hardness.

5. The bearing system according to claim 2, characterized in that, The elastic foils (14, 14.1, 14.2) have approximately 1 10 9 N / m 3 ±10% surface hardness.

6. The bearing system according to claim 2, characterized in that, The elastic foils (14, 14.1, 14.2) have approximately 1 10 9 N / m 3 ±5% surface hardness.

7. The bearing system according to any one of claims 2 to 6, characterized in that, a) The elastic foils (14, 14.1, 14.2) are formed as follows: a1) Metal mesh; a2) A raised foil with prominent bumps in the elastic foil (14, 14.1, 14.2); a3) Metal foil with a curved structure; or a4) Elastomer foil, and b) The elastic foils (14, 14.1, 14.2) are produced by etching; and c) The cover foil (13, 13.1, 13.2) is coated with a wear-reducing coating.

8. The bearing system according to any one of claims 2 to 6, characterized in that, The cover foils (13, 13.1, 13.2) have two different radii distributed in the circumferential direction.

9. The bearing system according to any one of claims 2 to 6, characterized in that, The elastic foil (14, 14.1, 14.2) and / or the cover foil (13, 13.1, 13.2) and / or the bearing housing (15, 15.1, 15.2) have radial through holes to guide the branched drive air radially from the outside to the inside.

10. The bearing system according to any one of claims 1 to 6, characterized in that, a) The radial bearing has at least two foil bearings (12, 12.1, 12.2) arranged one after the other in the axial direction. b) The two foil bearings (12, 12.1, 12.2) are arranged on different sides or the same side of the turbine impeller (5) of the compressed air turbine.

11. The bearing system according to claim 10, characterized in that, There are spacer rings between adjacent foil bearings (12, 12.1, 12.2).

12. The bearing system according to any one of claims 1 to 6, characterized in that, The bearing system has at least one additional thrust bearing for supporting the turbine shaft (3).

13. The bearing system according to claim 12, characterized in that, The thrust bearing has at least one spiral groove bearing.

14. The bearing system according to claim 12, characterized in that, The thrust bearing is a Rayleigh step bearing.

15. The bearing system according to claim 12, characterized in that, a) The thrust bearing includes a spiral groove bearing (9-11), and the radial bearing includes a foil bearing (12); or b) The thrust bearing includes a foil bearing (30), and the radial bearing includes a foil bearing (31).

16. The bearing system according to claim 12, characterized in that, The thrust bearing includes: a) A rotating disk (5, 20) connected to the turbine shaft (3) in a torsion-resistant manner and rotating together with the turbine shaft (3) during operation; and b) A first fixed disk (9, 21) is fixedly arranged in the bearing system, wherein the rotating disk (5, 20) and the first fixed disk (9, 21) are adjacent to each other in a generally planar parallel manner.

17. The bearing system according to claim 16, characterized in that, a) The thrust bearing has a second fixed disk (10, 22) arranged at a fixed position in the bearing system, and the rotating disk (5, 20) and the second fixed disk (10, 22) are adjacent to each other in a generally planar parallel manner; b) The two fixed discs (21, 22) are pre-pressed against each other in the axial direction; c) A spacer (23) is arranged between the two fixed disks (21, 22), the spacer (23) adjusting the axial distance between the two fixed disks (21, 22) to reduce starting friction.

18. The bearing system according to claim 17, characterized in that, The two fixed discs (21, 22) are pre-compressed against each other in the axial direction by at least one elastic element (24, 25).

19. The bearing system according to claim 17, characterized in that, The spacer (23) is constructed in the form of a spacer bolt (23).

20. The bearing system according to any one of claims 15 to 19, characterized in that, a) The rotating disk (5, 20) of the thrust bearing is connected to, or is formed by, the turbine impeller (5) of the compressed air turbine; and / or b) The spiral thrust bearings are arranged axially on both sides of the turbine impeller (5).

21. The bearing system according to claim 20, characterized in that, The rotating disks (5, 20) of the thrust bearing are connected to the turbine impeller (5) of the compressed air turbine in a manner that resists relative torsion.

22. The bearing system according to claim 20, characterized in that, The rotating disks (5, 20) of the thrust bearing are formed in a spiral shape on the stator side.

23. The bearing system according to any one of claims 2 to 6, characterized in that, a) The bearing housings (15, 15.1, 15.2) have an inner cross section that is substantially constant in the axial direction, while the cover foils (13, 13.1, 13.2) have an inner cross section that tapers in the circumferential direction or in the axial direction toward the bell cup (2); or b) The bearing housing (15, 15.1, 15.2) and the cover foil (13, 13.1, 13.2) both have a narrowed inner cross section.

24. The bearing system according to claim 23, characterized in that, The cover foil (13, 13.1, 13.2) has an inner cross section that tapers in the circumferential direction or in the axial direction toward the bell cup (2).

25. The bearing system according to claim 23, characterized in that, The bearing housing (15, 15.1, 15.2) and the cover foil (13, 13.1, 13.2) both have an inner cross section that tapers in the axial direction toward the bell cup (2).

26. The bearing system according to claim 23, characterized in that, The bearing housing (15, 15.1, 15.2) and the cover foil (13, 13.1, 13.2) both have an inner cross section that tapers in the axial direction toward the bell cup (2).

27. The bearing system according to any one of claims 2 to 6, characterized in that, a) The bearing system generates frictional heat during full-load operation, with a heating power of at least 50W, 100W, 200W, or 300W, to prevent condensation in the bearing system; and / or (b) The elastic foils (14, 14.1, 14.2) allow a certain radial elastic travel, the elastic foils (14, 14.1, 14.2) have a certain support diameter, and the ratio of the elastic travel to the support diameter is less than 0.1, 0.05, 0.01, 0.005 or 0.0033.

28. The bearing system according to any one of claims 1 to 6, characterized in that, a) The bearing system has a labyrinth seal (17) for sealing the turbine shaft (3). b) The labyrinth seal (17) surrounds the turbine shaft (3); c) The labyrinth sealing device has an annular or spiral groove structure.

29. The bearing system according to claim 28, characterized in that, The labyrinth seal (17) surrounds the turbine shaft (3) in a ring.

30. A rotary atomizer (1) having a bearing system according to any one of claims 1 to 29.

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