Component consisting of two components and gas turbine

Abstract

The invention relates to a component (1) which has two components (4, 7) pushed into one another and wherein a wedge-shaped structure (19) is present in the contact area of ​​the inserted component (4).

Description

[0001] The invention relates to an improved connection between two components of a component and a gas turbine.

[0002] If a component has two or at least two components that are interlocked or pushed together, this connection or contact point can lead to damage to at least one of these components during operation of the component due to vibrations between the components.

[0003] An example of this is the so-called "basket" of a gas turbine combustion system, which is connected to a "transition." The "basket" has spring clips at one contact point.

[0004] An example of this is disclosed in WO 2017 / 095358 A1.

[0005] This can lead to increased wear and tear.

[0006] It is therefore an object of the invention to solve the above-mentioned problem.

[0007] The object is achieved by a component according to claim 1 and a gas turbine or combustion system according to claim 7.

[0008] The subclaims list further advantageous measures which can be combined with each other as desired to achieve further advantages.

[0009] It shows Fig. 1 schematically shows a first and a second component of a component, Fig. 2 a section of a “basket”, Fig. 3 part of an improved connection.

[0010] The figures and the description represent only embodiments of the invention.

[0011] Investigations into occasional damage to a spring clip on the "basket" as a first component of a component show that this damage occurs more frequently when the coated area, i.e., the end of the spring clip, hammers through a layer in the receiving ring of the "transition" – a second component of the component. If a certain depth is reached in the receiving ring due to hammer wear, the end of a spring clip becomes wedged in the receiving ring, making axial displacement difficult or impossible. This leads to tensile stress in the spring clip, which can lead to crack initiation and ultimately damage to the spring clip.

[0012] Fig. 1 schematically shows a component 1 consisting of a “basket” 4 as the first component 4 and a “transition” as the second component 7. The “basket” 4 has a specially shaped front side with spring clips 13, whereby the “basket” 4 is pushed into a receiving ring 10 of the “transition” 7.

[0013] Fig. 2 shows a section of the “basket” 4, which comes to rest in the “transition” 7 in the receiving ring 10 and establishes a connection and contact.

[0014] One of several spring clips 13 with a coated end 16 can be seen.

[0015] In the prior art, this coating 16 is flat or of uniform thickness.

[0016] Fig. 3 shows an improved design of the spring clip 13 of the “basket” 4 or the first component, which forms a contact area with the “transition” 7 and thus represents an improved connection.

[0017] According to the invention, the end of the spring clip 13 is wedge-shaped or truncated conical.

[0018] Here, a wedge-shaped or truncated cone-shaped structure 19 is preferably present at the end of the spring clip 13.

[0019] The wedge-shaped structure 19 can preferably have a flattening at the top (truncated cone-shaped) as in Fig. 3, but can also be triangular in cross-section.

[0020] The wedge-shaped structure 19 can also be spherical or oval in cross section.

[0021] The slopes of the side surfaces of the wedge-shaped structure 19 or the truncated cone-shaped structure 19 can be the same or different (symmetrical, asymmetrical). This depends on the components 4, 7 and their operating conditions.

[0022] The wedge-shaped structure 19 can preferably be formed in one piece or monolithically with the spring clip 13.

[0023] The wedge-shaped structure 19 virtually replaces the coating 16.

[0024] The wedge-shaped structure 19 is preferably also produced separately, in particular by welding, or it 19 is soldered or welded on as a prefabricated element.

[0025] A wedge-shaped structure 19 is preferably produced by material deposition, in particular by LMD (Laser Metal Deposition).

[0026] Production can be carried out by known methods such as welding using filler metal, with wires or powder being available as filler material.

[0027] The wedge-shaped structure 19 on the first component 4 or on the spring clip 13 prevents wedging of the spring clip 13, since the wedge-shaped structure 19 enables movement in the event of “hammering” as described in the prior art.

[0028] Due to the wedge-shaped structure 19 with a material that is preferably more wear-resistant than the base material of the receiving ring 10, the abrasion caused by the spring clip 13 or the wedge-shaped structure can be further reduced.

[0029] The spring clip 13 preferably comprises a nickel-based alloy.

[0030] The wedge-shaped structure 19 has a different material that is significantly more erosion-resistant.

[0031] Different material means that at least one alloy component is present more or less or that at least one alloy component has a difference of at least 10%, in particular at least 15%, or that the material of the wedge-shaped structure 19 has a hardness that is at least 10%, in particular at least 20% higher.

[0032] Preferably, stellite is used as the material for the wedge-shaped structure 19.

[0033] This wedge-shaped design prevents the spring clip 13 from becoming wedged in the receiving ring 10 in the contact area of ​​the “transition” 7 and extends the service life and thus the service interval of the “baskets” 4. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2017 / 095358 A1

[0004]

Claims

[1] Component (1), which has two components (4, 7) pushed into one another, which have a contact area between each other, wherein the introduced component (4) is wedge-shaped or frusto-conical (19) in the contact area, in particular a wedge-shaped or frusto-conical structure (19) is present. [2] Component according to claim 1, in which the first component (4) has a spring clip (13), wherein one end of the spring clip (13) is wedge-shaped or truncated conical, in particular the end has a wedge-shaped structure (19). [3] Component according to claim 1 or 2, wherein slopes of the side surfaces of the wedge-shaped or truncated conical end of the spring clip (13) or of the structure (19) are equal (symmetrical). [4] Component according to claim 1 or 2, wherein the slopes of the side surfaces of the wedge-shaped or truncated conical end of the spring clip (13) or the structure (19) are different (asymmetrical). [5] Component according to one or more of claims 1, 2, 3 or 4, in which the wedge-shaped end (19) or the wedge-shaped structure (19) is made of a different material than the remaining part of the inserted component (4), in particular the spring clip (13), has, wherein the remaining part of the introduced component (4) comprises a nickel-based alloy, wherein the material of the wedge-shaped end (19) or the wedge-shaped structure (19) comprises at least 10%, in particular at least 20%, is harder. [6] Component according to one or more of claims 1, 2, 3, 4 or 5, wherein at least the wedge-shaped end (19) of the wedge-shaped structure (19) has a stellite as material. [7] Gas turbine or combustion system comprising a component (1) according to one or more of claims 1, 2, 3, 4, 5 or 6.

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