Low wear turbine housing clamp connection

Abstract

A turbine housing clamping connection for a turbine and a turbine having a turbine housing clamping connection are described. The turbine housing clamping connection comprises a bearing housing and a turbine housing, and a clamping component comprising a clamping flange clamped between a bearing housing clamping portion of the bearing housing and a turbine housing clamping portion of the turbine housing. The clamping flange has a bearing housing side clamping surface including a convexly curved clamping surface area. Furthermore, the convexly curved clamping surface area defines a minimum radius of curvature. The ratio of the minimum radius of curvature to the inner radius of the clamping surface is at least 0.1 and / or at most 10, preferably at least 0.5 and / or at most 2.0, more preferably at least 1.0 and / or at most 1.4.

Description

[Technical field]

[0001] The present disclosure relates to a turbine housing clamp connection for a turbine, and to a turbine comprising a turbine housing clamp connection. [Background technology]

[0002] Turbines, in particular radial turbines, with a bearing housing, a turbine housing, a heat shield and a nozzle ring are known from the prior art. Usually, in this case, the heat shield is clamped axially between the bearing housing and the nozzle ring and radially by the turbine housing, or the nozzle ring is clamped axially by the bearing housing and radially by the turbine housing. EP 1 428 983 A1 describes, for example, a housing for an exhaust gas turbine.

[0003] In applications where the load conditions change frequently, especially under high load conditions, the turbine may show signs of wear. This fatigue wear, especially on the bearing housings, can cause further problems. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Publication No. 1 428 983 Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above, there is a need for an improved nozzle ring for a turbine stage which can alleviate the above problems and in particular can be easily adapted to the respective requirements of a turbocharger and / or engine application. [Means for solving the problem]

[0006] The object is achieved at least in part by a turbine housing clamp connection according to claim 1. Furthermore, the object is achieved by a turbine comprising a turbine housing clamp connection according to claim 14 and by the use of a turbine housing clamp connection according to claim 15. Further embodiments, modifications and improvements can be found in the following description and in the appended claims.

[0007] According to one embodiment, a turbine housing clamping connection for a turbine, in particular a radial exhaust gas turbine, is provided. The turbine housing clamping connection comprises a bearing housing and a turbine housing, and a clamping component comprising a clamping flange clamped between a bearing housing clamping part of the bearing housing and a turbine housing clamping part of the turbine housing. The clamping flange has a bearing housing-side clamping surface with a convexly curved clamping surface area. Furthermore, the convexly curved clamping surface area defines a minimum radius of curvature. The ratio of the minimum radius of curvature to the inner radius of the clamping surface is at least 0.1 and / or at most 10, preferably at least 0.5 and / or at most 2.0, more preferably at least 1.0 and / or at most 1.4.

[0008] In the following, the invention will be explained in more detail with reference to embodiments that are not intended to limit the scope of protection defined by the claims.

[0009] The accompanying drawings illustrate embodiments and, together with the description, serve to explain the principles of the invention. Elements of the drawings are shown relative to each other, and are not necessarily to scale. Like reference characters indicate corresponding like elements. [Brief description of the drawings]

[0010] [Figure 1] 1 illustrates a turbine housing clamp connection according to one embodiment. [Diagram 2] 1 illustrates a turbine housing clamp connection according to one embodiment. [Figure 3a] 1 illustrates a clamp component according to one embodiment. [Figure 3b] 1 illustrates a clamp component according to one embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The following detailed description refers to the accompanying drawings, which form a part of this specification and which show by way of example specific embodiments in which the present invention may be practiced. It is to be understood that other embodiments may be used and structural or logical changes may be made without departing from the scope of protection of the present invention. Therefore, the following detailed description should not be construed as limiting, and the scope of protection of the present invention is determined by the appended claims. The described embodiments use specific terminology that should not be construed as limiting the scope of protection of the appended claims.

[0012] Figures 1 and 2 each show a turbine housing clamp connection according to one embodiment, with the bearing housing side clamping surfaces of the clamp flanges shown in a highly simplified manner. For illustrative purposes, the clamp connection is shown installed in a turbine. An exemplary configuration of the bearing housing side clamping surfaces is shown in Figures 3a and 3b.

[0013] As shown in the embodiment of Figures 1 and 2, according to a general aspect of the invention, a turbine housing clamp connection 100 for a turbine 200, 300, in particular a radial exhaust gas turbine, is provided. The turbine housing clamp connection 100 comprises a bearing housing 110 and a turbine housing 120. Furthermore, the turbine housing clamp connection 100 comprises (at least) one clamping component 130, 140 with a clamping flange 137, 147 clamped between a bearing housing clamping portion of the bearing housing 110 and a turbine housing clamping portion of the turbine housing 120. The clamping flange 137, 147 is in each case clamped or fixed by the bearing housing 110 and the turbine housing 120 directly (i.e. directly without additional intermediate components) or indirectly (i.e. additional components are arranged between the clamping flange and the bearing housing 110 or the turbine housing 120).

[0014] According to one embodiment, the clamping component is a heat shield 130. Figure 1 shows a clamping connection 100 including a heat shield 130 as a clamping component. The heat shield 130 is typically a substantially disk-shaped intermediate wall for shielding the bearing housing 110 from hot gases or exhaust gases flowing in the inlet path of the turbine. Preferably, the turbine housing clamping connection 100 further comprises a nozzle ring 140, which in this case serves as an additional clamping component. In this case, the heat shield 130 can be clamped axially between the bearing housing clamping part of the bearing housing 110 and the nozzle ring 140 via its clamping flange 137, and by the turbine housing clamping part of the turbine housing 120. The heat shield 130 can further comprise one or more supports or edges 121, 144 for bearing against a support or edge 141 of the bearing housing 110 and / or for bearing against the turbine housing 120. Furthermore, the clamp connection 100 may have one or more tabs 145 on the bearing housing 110, which can be fixed to the turbine housing by means of screws 142. By tightly screwing the tabs 145, the heat shield 130 and the nozzle ring 140 are tightly fixed between the turbine housing 120 and the bearing housing 110, and are axially fixed accordingly. In the idle mode of the turbine, when the turbine housing 120 and the bearing housing 110 are cold, the inner peripheral surface, e.g., the circumferentially cylindrical inner peripheral surface, of the turbine housing 120 preferably rests on the outer peripheral surface, e.g., the circumferentially cylindrical outer peripheral surface, of the bearing housing 110, so that it is properly centered with respect to the turbine shaft of the turbine and the turbine wheel 143 arranged thereon.

[0015] According to a further embodiment, the clamping component 130, 140 is a nozzle ring 140. In Fig. 1, a nozzle ring 140 is provided as an additional clamping component of this type.

[0016] FIG. 2 shows a further example of the clamp connection 100, in which the clamp component is a nozzle ring 140. The clamp connection 100 of the turbine housing may further comprise a heat shield 160. The heat shield 160 may be located radially inward of the nozzle ring 140 and may be held in place axially by a second bearing housing clamp part. Furthermore, the heat shield 160 may be held in place axially and radially by the nozzle ring 140, for example by supports of the nozzle ring 140. The heat shield 160 may typically take the form of a substantially disk-shaped intermediate wall for shielding the bearing housing from hot gases or exhaust gases flowing in the inlet path of the turbine. The heat shield 160 may further comprise one or more supports for bearing against the bearing housing 110 and / or the nozzle ring 140.

[0017] The clamping flange 137, 147 of at least one of the clamping components, e.g. the clamping components 130, 140 shown in Figures 1 and 2, has a bearing housing-side clamping surface 131 with a convexly curved clamping surface area 132. Figures 3a and 3b show the configuration of the bearing housing-side clamping surface 131 with the clamping flange 137 of the heat shield 130 as an example. If the clamping component is not a heat shield but e.g. a nozzle ring 140, the bearing housing-side clamping surface can be configured accordingly and the description of the clamping flange 137 can be applied analogously to the clamping flange 147.

[0018] According to a general aspect, the clamping components 130, 140 (and the bearing housing and turbine housing) are configured to completely surround the turbine shaft. The clamping components 130, 140 may have a substantially disk-shaped cross section. In this case, the clamping flange is preferably clamped around the entire circumference of the clamping components 130, 140 between the bearing housing clamping portion of the bearing housing 110 and the turbine housing clamping portion of the turbine housing 120.

[0019] The convexly curved clamping surface area 132 of the bearing housing clamping surface is preferably arranged radially outward on the clamping flange 137. Figures 3a and 3b each show an example of a bearing housing clamping surface 131 with a convexly curved clamping surface area 132 arranged radially outward. In this case, the convexly curved clamping surface area 132 has a convexly curved portion that faces away from the bearing housing 110 when viewed in a radially outward manner from a radially inner position. In this case, the axial direction is defined by the turbine shaft, and the radial direction extends perpendicular to the axial direction. In Figure 3a, the radial direction R (from a radially inner position to a radially outer position) and the axial direction A are each indicated by an arrow. In other words, the radially outer clamping surface area 132 is convexly curved in a cross-sectional view including the turbine shaft.

[0020] In this case, the convexly curved clamping surface area 132 has a minimum radius of curvature R K The radius of curvature R K is indicated by a double-headed arrow in FIG. 3a. The convexly curved clamping surface area 132 is further defined by an osculating circle segment U K In this case, the osculating circle segment is slightly or gently convexly curved or rounded.

[0021] In this case, as shown for example in Fig. 3b, the radially inner end 133 of the convexly curved clamping surface area 132 can correspond to the axially outermost point of the convexly curved clamping surface area 132 on the bearing housing side. In this case, the radially inner end 133 has a minimum distance (when viewed in the idle state) to the clamping part of the bearing housing and / or is directly fixed to the clamping part of the bearing housing. Alternatively, as shown for example in Fig. 3a, a point on the convexly curved clamping surface area 132 which is a point at a predetermined distance from the radially inner end 133 can correspond to the axially outermost point on the bearing housing side.

[0022] In other words, the osculating circle segment U K The axially outermost point of U may correspond to the radially inner end 133, and the clamping surface area extends away from the bearing housing 110 when viewed from the radially inner end 133 to the radially outer end 135. Alternatively, the osculating circle segment U K The axially outermost end of the osculating circle segment U K It may also be placed at any desired location along the

[0023] The bearing housing clamping surface 131 may have one or more clamping surface areas which are clamped by the bearing housing clamping parts. Typically, the bearing housing clamping surface defines at least one additional clamping surface area. The additional clamping surface area is preferably a radially inner clamping surface area and / or a radially outermost clamping surface area. For example, Fig. 3b shows the bearing housing clamping surface 131 with a convexly curved clamping surface area 132, a radially inner clamping surface area and a radially outermost clamping surface area.

[0024] The radially inner clamping surface area and / or the radially outermost clamping surface area are preferably not convexly curved but are formed substantially flat, however, for example, the radially inner clamping surface area and / or the radially outermost clamping surface area may also have a convexly formed portion with a radius of curvature smaller than the minimum radius of curvature of the convexly curved clamping surface area 132.

[0025] In an alternative configuration, the bearing housing clamping surface does not have a radially outermost clamping surface area. In this case, the convexly curved (radially outer) clamping surface area extends to the radial end 134 of the bearing housing clamping surface. Figure 3a shows a bearing housing clamping surface 131 in which the radially outer end 135 of the convexly curved clamping surface area 132 corresponds to the radial end 134 of the bearing housing clamping surface.

[0026] The convexly curved clamping surface area is preferably the radially outer clamping surface area of ​​the bearing housing clamping surface. The bearing housing clamping surface may further comprise a radially inner clamping surface area. The convexly curved (radially outer) clamping surface area 132 adjoins the radially inner clamping surface area continuously, preferably tangentially continuous. For example, FIG. 3b shows a tangentially continuous transition from the radially inner end 133 to the flat radially inner clamping surface area. In a cross-sectional view including a turbine shaft, the radially inner clamping surface area preferably extends linearly in the radial direction. This makes it possible to provide a smooth and continuous transition between the convexly curved clamping surface area and the radially inner clamping surface area. This may also serve to counter high local bearing stresses, both in stationary and in transient operating conditions. The radially inner clamping surface area may be formed (in radial view) to be substantially flat.

[0027] Additionally or alternatively, the bearing housing-side clamping surface can comprise a radially outermost clamping surface area, which can adjoin the convexly curved (radially outer) clamping surface area continuously, preferably tangentially, thereby preferably resulting in a smooth and continuous transition between the convexly curved (radially outer) clamping surface area and the radially outermost clamping surface area. The radially outermost clamping surface area can be formed (seen in the axial direction) to be substantially flat and can further deviate slightly or gradually from a flat course in the area of ​​the transition to the convexly curved clamping surface area.

[0028] Inner radius D of the clamping surface R is the radius measured from the center of mass of the turbine shaft or the center of mass of the cross-sectional view of the clamping component in this case. According to the present disclosure, the inner radius D Ris the radius measured at the turbine housing clamp connection or at the idle state of the turbine. For example, under high load conditions, the inner radius D R All characteristics or parameters disclosed herein are measured at idle conditions unless expressly stated otherwise.

[0029] inner radius D R is the radius of the convexly curved clamping surface area, preferably at the axially outermost point of the curved clamping surface area as viewed from the bearing housing. In some configurations, the inner radius D R is the radius of the radially inner end 133. In other words, the inner radius D R is preferably the radial distance between the centre of mass of the turbine shaft and the axially outermost point of the curved clamping surface area as viewed from the bearing housing side.

[0030] The inventors have found that in turbine housing clamp connections known from the prior art, asymmetric heating between the bearing housing 110 and the clamping components 130, 140, e.g. heat shields, can tilt or tilt the contact surface between the bearing housing and the clamping components. For example, the bearing housing may be made of alloy GGG40 and the clamping components made of a more highly alloyed, generally heat-resistant material. The clamping components are typically located in the fluid flow path and therefore experience higher temperatures than the contact points between the bearing housing and the clamping components. The clamping components heat up more rapidly during operation and typically have a larger coefficient of thermal expansion than the bearing housing. This asymmetric heat input causes the clamping components to move relative to the bearing housing during the heating process and when load conditions change.

[0031] The inclination of the contact surface between the bearing housing and the clamping components in the turbine housing clamping connections known from the prior art causes high local bearing stresses. As a result of the relative motion, this high load point can move across the contact surface (of the bearing housing clamping portion) of the bearing housing 110, causing fatigue wear and, as a result, leading to further problems such as loss of bolt preload or gas leakage.

[0032] The turbine housing clamp connection according to an embodiment of the present disclosure has a clamp component 130 with a convexly curved clamp surface area 132, which significantly reduces wear of the components, especially the bearing housing. Providing a clamp surface area with a slightly or gently convexly curved shape ensures that the clamp surface is supported over a large area, not only in "hot" conditions (i.e. under high load conditions or when the temperature of the fluid in the radial turbine is high), but also during the entire heating process as well as in idle conditions, preventing high local bearing stresses. Due to the slightly convexly curved shape, a large contact surface is provided between the bearing housing clamp part and the bearing housing side clamp surface, both in static and transient operating conditions, resulting in a significantly reduced wear. The convexly curved clamp surface area configured according to the present invention allows the clamp component to tilt slightly during the heating process without resulting in excessive local contact stresses in the contact area between the bearing housing clamp part and the bearing housing side clamp surface compared to the cold state.

[0033] The inventors have further found that high localized bearing stresses and associated fatigue wear can be most effectively addressed when the ratio of the minimum radius of curvature to the inside radius of the clamping surface is at least 0.1 and / or at most 10, preferably at least 0.5 and / or at most 2.0, more preferably at least 1.0 and / or at most 1.4.

[0034] According to an embodiment of the present disclosure, the curved clamping surface area is configured to ensure substantially surface-to-surface contact with the bearing housing clamping part when the clamping flange is tilted. In this case, "tilting" means that the radially inner part of the clamping flange moves axially away from the bearing housing and / or towards the turbine housing relative to the radially outer part of the clamping flange (tilting). Tilting may involve a rolling and / or shifting movement of the clamping surface. This means that tilting is possible without a fixed tilt point on the clamping surface. In this case, "surface-to-surface contact" does not necessarily have to be understood as contact over the entire surface between the bearing housing clamping part and the convexly curved clamping surface area. By configuring the curved clamping surface area to ensure surface-to-surface contact with the bearing housing clamping part, high local bearing pressures are still prevented. The convexly curved clamping surface area is therefore configured to counter wear of the bearing housing.

[0035] According to one embodiment, the axial offset t between the axially outermost point of the curved clamping surface area 132 on the bearing housing side and the radially outer end 135 of the curved clamping surface area 132 is at least 0.01 mm and / or at most 0.5 mm, preferably 0.02 mm and / or at most 0.2 mm, more preferably at least 0.03 mm and / or at most 0.1 mm. In Fig. 3a, the axial offset t is indicated by a double-headed arrow. In this case, the axial offset is taken as the maximum radius of curvature R achievable during operation, in particular in the idle state. K Under high load conditions, the clamp flange may tilt, decreasing the axial offset t.

[0036] Additionally or alternatively, the axial offset t between the radially inner end 133 of the curved clamping surface area 132 and the radially outer end 135 of the curved clamping surface area 132 is at least 0.01 mm and / or at most 0.5 mm, preferably 0.02 mm and / or at most 0.2 mm, more preferably at least 0.03 mm and / or at most 0.1 mm. The radially outer end 135 is axially offset towards the turbine housing due to the convex curvature. The radially inner end 133 is axially offset towards the bearing housing due to the convex curvature in some configurations (e.g. as shown in FIG. 3b) and in other configurations is also axially offset towards the turbine housing due to the convex curvature (e.g. as shown in FIG. 3a). The radially outer end 135 may be the radially outermost point achievable during operation at which the bearing housing clamping portion of the bearing housing 110 can be clamped.

[0037] In one embodiment, the minimum radius of curvature R of the convexly curved clamping surface region 132 K is at least 20 mm and / or at most 1000 mm, preferably at least 50 mm and / or at most 500 mm, more preferably at least 100 mm and / or at most 200 mm, and most preferably at least 140 mm and / or at most 160 mm. K The radius of curvature R in the above range is 150 mm. K In addition, or alternatively, the inner radius D of the clamping surface or convexly curved clamping surface region 132 may be adjusted to ensure that the curvature deviates sufficiently from the flat clamping surface region while not being excessively curved. R may be at least 20 mm and / or at most 300 mm, preferably at least 100 mm and / or at most 140 mm.

[0038] The curved clamping surface area 132 may have a radial extent of at least 0.5 mm and / or at most 10 mm. Preferably, the curved clamping surface area 132 has a radial extent of at least 3 mm and / or at most 6 mm. In an embodiment in which the clamping surface comprises a radially outermost clamping surface area, the radial distance between the radially inner end 133 of the curved clamping surface area 132 and the radial end 134 of the bearing housing side clamping surface may be at least 2 mm and / or at most 20 mm, preferably at least 6 mm and / or at most 10 mm.

[0039] The inner radius D of the clamping surface or convexly curved clamping surface area 132 R The ratio of the radial extent of the curved clamping surface area 132 to may be at least 0.005 and / or at most 0.1, preferably at least 0.02 and / or at most 0.05.

[0040] In a preferred embodiment, the ratio of the axial offset t to the radial extent of the curved clamping surface area 132 is at least 5*10 -3 and / or at most 0.02, preferably at least 8*10 -3 and / or a maximum of 0.015. The ratio in the above range ensures that the curvature deviates sufficiently from the flat clamping surface area while at the same time not curving excessively.

[0041] The curved clamping surface area 132, in particular the convexly curved clamping surface area 132, has a radially inner end 133 and a radially outer end 135 that are aligned with the osculating circle segment U K The osculating circle segment U K The central angle α is at least 0.5° and / or at most 4°, preferably at least 1.2° and / or at most 2.0°. Figure 3a shows the central angle α.

[0042] Additionally or alternatively, the axial offset t and the radius of curvature R K The ratio of -4 and / or up to 2*10-3 , preferably at least 3*10 -4 and / or up to 8*10 -4 It can be said that:

[0043] The tangent angle of the curved clamping surface areas 132 to the radial direction may be at least 0.5° and / or at most 4°, preferably at least 1.2° and / or at most 2.0°. Furthermore, in a cross-sectional view including a turbine shaft, at least one tangent angle of the curved clamping surface areas 132 to the radial direction may be at least 0.5°, preferably at least 1.2°, and / or all tangent angles of the curved clamping surface areas 132 to the radial direction may be at most 4°, preferably at most 2.0°.

[0044] Other aspects of the clamp flange, such as the turbine housing-side clamping surface, are not particularly limited in accordance with this disclosure and may be formed in accordance with clamp flanges known in the art.

[0045] According to one aspect, a turbine, preferably a radial turbine 200, 300, is provided. The turbine has a turbine housing clamp connection according to any one of the embodiments described herein. In a configuration, the turbine is a power turbine and / or an exhaust gas turbine. For example, the exhaust gas turbine may be an exhaust turbocharger turbine. According to one embodiment, a turbocharger is provided comprising a turbine according to any one of the embodiments described herein. The turbine may further comprise a turbine wheel 143.

[0046] One aspect relates to the use of a turbine housing clamp connection for a radial turbine to combat wear of a bearing housing of the radial turbine. The turbine housing clamp connection and / or the radial turbine may be configured according to any of the embodiments disclosed herein. The turbine housing clamp connection has a convexly curved clamp surface area, in particular according to any one of the embodiments disclosed above.

[0047] Although specific embodiments are shown and described in this specification, the shown embodiments can be combined or modified in a suitable manner within the scope of the present invention without departing from the scope of protection of the present invention. [Explanation of symbols]

[0048] 100 Turbine housing clamp connection 110 Bearing housing 120 Turbine housing 121 Support, edge 130, 160 Heat shield 131 Bearing housing side clamp surface 132 Convexly curved clamping surface area 133 Radially inner end of convexly curved clamping surface area 134 Radial end of bearing housing side clamping surface 135 radially outer end of the convexly curved clamping surface area 140 Nozzle Ring 141 Support, edge 142 Fasteners, screws 143 Turbine Wheel 144 Support part 145 tabs 150 Turbine shaft 200, 300 Radial flow turbine

Claims

1. A turbine housing clamp connection (100) for a turbine (200, 300), comprising: A bearing housing (110) and a turbine housing (120), a clamping component (130, 140) comprising a clamping flange clamped between a bearing housing clamping portion of the bearing housing (110) and a turbine housing clamping portion of the turbine housing (120); having The clamping flange has a bearing housing-side clamping surface (131) including a convexly curved clamping surface area (132), The convexly curved clamping surface area has a minimum radius of curvature (R K ) The inner radius (D R ) for the minimum radius of curvature (R K ) is at least 0.1 and / or at most 10, and the ratio of the inner radius (D R ) is the radius of the convexly curved clamping surface area at its axially outermost point as viewed from the bearing housing side.

2. 2. The turbine housing clamp connection (100) of claim 1, wherein the convexly curved clamping surface area is a radially outer clamping surface area of ​​the bearing housing side clamping surface (131), the bearing housing side clamping surface (131) further having a radially inner clamping surface area, the radially outer clamping surface area being continuously adjacent to the radially inner clamping surface area.

3. 2. The turbine housing clamp connection (100) of claim 1, wherein the curved clamp surface area is configured to ensure substantial surface-to-surface contact with the bearing housing clamp portion when the clamp flange is tilted.

4. 2. The turbine housing clamp connection (100) of claim 1, wherein an axial offset (t) between a radially inner end (133) of the curved clamping surface area (132) and a radially outer end (135) of the curved clamping surface area (132) is at least 0.02 mm and / or at most 0.2 mm.

5. The minimum radius of curvature (R K 2. The turbine housing clamp connection (100) of claim 1, wherein the distance between the first and second clamp members is at least 20 mm and / or at most 1000 mm.

6. The inner radius (D R 2. The turbine housing clamp connection (100) of claim 1, wherein the distance between the first and second flanges is at least 20 mm and / or at most 300 mm.

7. The curved clamping surface area (132) is defined by an osculating circle segment (U K ), and the osculating circle segment (U K 2. The turbine housing clamp connection (100) of claim 1, wherein a central angle alpha (α) of the clamp joint (100) is at least 0.5° and / or at most 4°.

8. 2. The turbine housing clamp connection (100) of claim 1, wherein in a cross-sectional view including a turbine shaft, at least one tangential angle of the curved clamping surface area (132) with respect to a radial direction is at least 0.5° and / or all tangential angles of the curved clamping surface area (132) with respect to a radial direction are at most 4°.

9. The turbine housing clamp connection (100) of claim 1, wherein the curved clamping surface area has a radial extent of at least 0.5 mm and / or at most 10 mm.

10. The inner radius (D R 2. The turbine housing clamp connection (100) of claim 1, wherein a ratio of the radial extent of the curved clamping surface area to the radial extent of the curved clamping surface area is at least 0.005 and / or at most 0.

1.

11. The ratio of the axial offset (t) to the radial extent of the curved clamping surface area is at least 5*10 -3 and / or a maximum of 0.

02.

12. The turbine housing clamp connection (100) of claim 1, wherein the clamp component (130, 140) is a heat shield (130).

13. 13. The turbine housing clamp connection (100) of claim 12, further comprising a nozzle ring (140), the heat shield (130) being axially clamped between a bearing housing clamp portion of the bearing housing (110) and the nozzle ring (140).

14. The turbine housing clamp connection (100) of claim 1, wherein the clamp component (130, 140) is a nozzle ring (140).

15. A turbine having a turbine housing clamp connection (100) according to claim 1.

16. A radial flow turbine having a turbine housing clamp connection (100) according to claim 1.

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