EP3583299A1

EP3583299A1 - Method for producing a vibration-damping structure combination for damping vibrations of movable masses

Info

Publication number: EP3583299A1
Application number: EP18727223.2A
Authority: EP
Inventors: Robin Blank; Lena FARAHBOD-STERNAHL; Christoph Kiener; Sascha Martin Kyeck; Yves K STERS; Simon Purschke; Helge Reymann
Original assignee: Siemens AG
Current assignee: Siemens Energy Global GmbH and Co KG
Priority date: 2017-05-22
Filing date: 2018-05-18
Publication date: 2019-12-25
Also published as: JP7184809B2; JP2020521906A; DE102017208631A1; WO2018215323A1; US20200080611A1; US11761338B2

Abstract

The invention relates to a method for producing a vibration-damping structure combination (18) for damping vibrations for movable masses (10), said structure combination having a first structure (2) and a further structure (3), the further structure (3) being movable within a stop surface (20) defined by a first structure surface (5) of the first structure (2), comprising the following steps: a) providing the first structure (2), which has the first structure surface (5) and which defines a coating surface (6) of a coating (4) at least in some sections; b) coating the first structure surface (5) of the first structure (2) with the coating (4), the coating surface (6) of the coating (4) being applied in such a way that a cavity (8) is formed; c) filling the cavity (8) with the filler (9); d) curing the filler (9) until the further structure (3) having a further structure surface (7) is formed, which lies against the coating surface (6); and e) removing the coating (4), the further structure (3) thus being movable relative to the first structure (2) within the stop surface defined by the first structure surface (5).

Description

description

Method for producing a vibration-damping structure combination for damping oscillations of movable masses

The invention relates to a method for producing a vibration-damping structure combination, an intermediate product of the method for producing the vibration-damping structure combination and the structural combination for damping vibrations of movable masses.

A rotating turbomachine, such as a turbine for a power plant, for example, has a rotor with a plurality of rotor blades and a stator with a plurality of stator blades. The rotor moves during operation of the turbine to a Ro ^¬ tationsachse with a certain rotational speed, thereby also arranged on the rotor blades move around the rotation axis of the rotor at the determined rotation speed. The rotational speed of the rotor may change during operation, whereby a positive or negative rotational acceleration of the rotor and blades may occur due to the change of the Rotationsgeschwindig ^¬ ness. The positive or negative rotational accelerations of the blades can cause vibrations of the blades

Create blades. Due to the fact that operating parameters of the guide vanes may change as a result of changes in the operation of the turbine, vibrations may also occur with the guide vanes. The oscillatory sections of the guide or moving blades can be regarded as movable masses. Vibrations of the blades and / or the vanes may cause cracking in the respective blades and / or the vanes, or enhance an existing cracking process in the respective rotor blades and vanes. The cracks can cause in the operation of the turbine parts of the run show ^¬ feln, the vanes and / or one of the blades of the rotor and / or one of the vanes of the stator triggers, causing the rotor, the other blades, the

Stator or the other vanes can be damaged. In order to prevent damage to the rotor, the other blades, the stator or the other vanes, the blades and the vanes are replaced after a certain period of operation in a maintenance process. The predetermined operating time after which the rotor or vane is changed depends on the respective blades or vanes. Therefore, the blades or the vanes have a relatively short life. The object of the invention is therefore to provide a method for producing a vibration-damping structure combination for damping oscillations of movable masses, an intermediate of the method for producing a vibration-damping structure combination and a structural combination for damping the vibrations of movable masses.

The object is achieved with the features of claims 1, 6 and 11. Preferred embodiments thereof are given in the weite ^¬ ren claims.

The inventive method for manufacturing a vibration-damping structure combination for damping vibrations of movable masses with a first structure and another structure, wherein the further structure within a defined by a first structure surface of the first structure stop surface is movable, has the following Schrit ^¬ te: a) providing the first structure having the first structure surface, which at least in sections defines a coating surface of a coating; b) coating the first structure surface of the first

Structure with the coating, wherein the coating surface of the coating is applied forming at least one cavity; c) filling the cavity with the filler; d) curing the filler until the further structure is formed with another structure surface which abuts the coating surface; and e) removing the coating whereby the further structure becomes movable to the first structure within the abutment surface defined by the first structure surface.

The abutment surface may be a boundary surface within which the further structure may move relative to the first structure. By virtue of the fact that the first structure is movable within the abutment surface defined by the first structure surface, oscillations which are triggered, for example, via positive or negative accelerations of the moved first structure can take place by means of a compensating movement and / or by striking the further structure Surface of the further structure are damped to the abutment surface of the first structure. By virtue of the fact that the vibration of the first structure can be damped by means of the compensating movement or by means of the abutment, cracking or crack enlargement due to the vibrations can be counteracted. So the invention chooses a different way. While only symptoms of the problem are being ^dealt with in the maintenance process, the actual cause of the problem, the occurrence of vibrations in the moving blades and the guide vanes, remains unaffected. By contrast, vibrations are damped by the invention and thus the life of Leitschau ^¬ blades or blades lengthened. It is conceivable by way of example that is built up around a rotation axis ^¬ moving blade of a turbine from the vibration-damping structure combination. The fact that the blade is constructed of the vibration-damping structure combination, the vibrations occurring during operation can be damped, whereby the cracking or crack increase is inhibited and / or reduced. By inhibiting and / or reducing cracking or crack increase, the life of the rotor blade increases. It is likewise conceivable to construct a guide vane of the turbine or of another vibration-sensitive component of a turbine from the vibration-damping structural combination. In addition to a rotation, a movement responsible for the oscillation may also be, for example, a linear movement, a tilting movement, a movement along a curve, an accelerated movement or any other form of movement. The coating of the ers ^¬ th surface structure described in process step b) can be by way of example, carried out by means of a Gal ^¬ vanisierung or chemical vapor deposition such as CVD. Other coating methods may also be used. The first structure surface area is coated such that the filler can produce no unwanted contact with the first structure during the filling of the hollow space ^¬ with the filler. However, it may be advantageous for the first structure to be in contact with the hardened filler, the further structure, in order to allow advantageous transport, advantageous handling or advantageous assembly of the structural combination. After transport, handling or assembly, the connection between the first structure and the further structure can be exemplified by means of a single application of force or by means of a one-time application

Temperaturbeaufschlagung be solved, whereby the further structure is movable to the first structure within the stop surface defined by the first structure surface. The described in process step c) filler may be at ^¬ play, a molten metal or slurry. The fillers used should be selected based on the desired requirements and / or on the material used in the first structure. The curing of the filler can be carried out, for example, without an active action in the curing process over a longer period of time, or be carried out by the active action in the curing process via an active cooling and / or an active heating of the structure combination.

The removal of the coating can be carried out, for example, by means of an etching process or by means of another chemical or physical process. Another

Possibility to remove the coating is that the structure combination with the coating on a

Melting point or a vaporization point of the coating is heated, whereby the coating loses its solid form and can be removed. ^{By way of} example, the removal can also take place during operation of the structural combination, as a result of which the further structure is better protected during transport, handling and assembly. However, ^{removal of} the coating during operation must take place in such a way that the further structure to the first structure is movable within the stop surface defined by the first structure surface.

The intermediate product according to the invention for producing a vibration-damping structure combination has a first structure which has a first structure surface which abuts at least in sections on a coating surface of a coating and a further structure having a further structure surface which consists of a cured with a Filler filled cavity is formed, wherein the further structure surface is at least partially applied to the coating surface of the Beschich ^¬ tion, wherein the coating is removable to the to make further structure movable within a stop surface defined by the first structure surface. The intermediate is a product of the process that was performed up to step d) curing of the filler. The intermediate product has the coating, where ^{¬ abuts} at least in sections on the coating surface of the coating by the further structure. As a result of the fact that the further structure bears against the coating surface of the coating at least in sections, relative movement of the further structure to the first structure is prevented. Therefore, the intermediate product is advantageously transportable, manageable and mountable. Then the coating removed, the other structure is inner ^¬ half of the abutment surface defined by the first structure surface movable, which by means of a Ausgleichsbewe ^¬ account the other structure and / or by means of a beating-up of the further structure to the abutment surface of the first structure Vibrations of the first structure become dampened. The removal of the coating can take place, for example, after transport, handling or after assembly. It is conceivable by way of example that the coating can be removed by means of an etching or by means of a temperature application. The temperature treatment may be by way of example be designed such that the melting point of the coating material and / or the vaporization point of the coating material is exceeded, whereby the liquid or gaseous Be ^¬ coating is exemplary discharged via a small opening. By way of example, the temperature application can also take place in a first operating phase during operation of the moving masses, as a result of which the further structure to the first structure can only be moved during operation. By doing that further

Structure is movable to the first structure only during operation, the assembly can be carried out particularly advantageous. By way of example, the liquid or gaseous coating may remain in the cavity throughout the life of the structural combination and operate as a damping means between the further structure and the first structure act. If the operating temperature of the moving masses by way of example above the melting point of the coating or above the vaporization point of the coating, it is conceivable that the coating is in solid form outside of the operation to exemplary perform maintenance processes advantageous ^¬ way, and that the coating during the Operating in liquid or gaseous form to function in operation as a damping means between the first structure and the other structure.

By way of example, even after the removal of the coating, another damping means, such as, for example, an oil or an inorganic liquid, may be interposed between the first structure and the further structure in order to move the further structure relative to the first structure until the other structure strikes to dampen the first structure surface.

The structural combination according to the invention for damping vibrations of movable masses has a first movable

Structure, which has a certain first inertia and having a ers ^¬ te structure surface, which is designed as a stop surface and a mitbewegbare other structure on which is molded from a filled with a cured filling agent cavity, wherein the further structure comprises a BE ^{¬ has} more inertia and has a further structure surface and the other structure to the first structure within the defined by the first surface structure ^¬ defined abutment surface is movable, whereby vibrations that can be triggered via positive and / or negative accelerations of the movable masses are, by means of a further inertia of the further structure conditional compensating movement and / or by means of a striking of the further structure surface of the further structure to the abutment surface of the first structure can be damped. Characterized in that the vibrations are damped by means of the compensating movement and / or by means of an abutment of the wide ^¬ ren structure to the abutment surface, is the formation of cracks and / or an enlargement of a counteracted existing crack. Characterized that the crack ^¬ formation is counteracted, the service life of a component which at least partially has the structure combination may increase.

The compensating movement is one of the positive or negative acceleration opposing movement of the further structure from a rest position to a deflected position. Due to gravity or due to the centrifugal force during a rotational movement, the compensating movement is usually possible only by overcoming a static friction. The static friction is the force that prevents a sliding of touching bodies and depends on material properties and properties

Surface textures of the body. The material properties and the surface textures of the first

Structure and the other structure can be influenced in such a way that a defined starting of the desired compensation movement is made possible. When the compensating movement has started, the compensation movement can be influenced on the basis of the friction of the first structure moving away from one another and another structure.

Another way the compensation movement to beeinflus ^¬ sen is to make the shape of the abutment surface of the first structure such that a restoring force which is responsible for returning the other structure in the rest position, increases with the deflection of the further structure from the rest position , The greater the deflection from the rest position, the greater the restoring force acting on the further structure. This may be possible, for example, by means of a parabolic stop surface on which the further structure moves. The shape of the abutment ^surface thereby influences the compensatory movement. The fact that the shape of the Anaschlagfläche affects the compensating movement, depending on the requirements of the structure combination, the appropriate shape of the stop surface can be selected. A wave ^¬ shaped or jagged stop surface is also conceivable. By way of example, the compensation movement can also be influenced by means of insertion of spring elements and / or damping elements, whereby a spring-damper system is formed. The spring elements and / or the damping elements are by way of example be fastened to the first structure and the further structure, whereby the deflection of the further structure from the rest position and the return to the rest position are impressive flow ^¬ bar. Based on a spring constant and using a Dämp ^¬ Fung constant the behavior of the spring-damper system can be controlled. The fact that the behavior of the spring-damper system can be influenced, the right spring element with the appropriate spring constant and / or the right Dämpfele- can be ment selected with the appropriate damping constant depending on the Anforde ^¬ implications of structural combination.

In addition to the compensating movement, the striking of the further structure against the stop surface can also dampen the vibrations. By means of the abutment of the further structure, the compensatory movement is stopped. By stopping the compensating movement, a force due to the inertia of the moving masses can further damp the vibration of the first structure. The position of the abutment surface, which stops the equalizing movement of the further structure, defines when the compensating movement is stopped, and thereby the occurring due to the inertia of the moving masses

Counteracts the unwanted vibration of the first structure. As a result, the position of the stop surface defines when the oscillation of the first structure can be damped by means of abutment with the stop surface.

By way of example, a shock which occurs due to the abutment of the further structure on the abutment surface may be elastic or plastic. This can be influenced by means of the material properties of the first structure and of the further structure. By way of example, an elastic behavior of the joint, in which no kinetic energy is transformed into internal energy such ^¬ way of heat or deformation desired, the material properties of the first structure and should further structure can be chosen accordingly. If a plastic impact is desired, the material properties should also be selected accordingly. Preferably, at least in part, a lattice network structure is provided as the first structure. The grid structure can be constructed, for example, from a plurality of juxtaposed unit cells. The unit cell is a specific geometric shape such as for example, a cube or a cuboid, having a certain number of unit cells at ^¬ interfaces depending on the shape. The unit cell has in its interior a physical area and a disembodied area. The physical area is filled with filling material and the disembodied area is free of filling material. The physical area and the disembodied area are such arranged in the unit cell, that when flat against one another arranged unit cells connected a physical structure and a connected disembodied structural ^¬ tur arise. Typical forms of the physical structure of one of the unit cells are, for example, star geometries or cross geometries.

The grid structure can be produced by way of example by means of additive manufacturing. A preferred method may be a selective laser fusion.

The additive manufacturing processes make it possible to produce lattice structures of different materials such as aluminum alloy AlSilOMg, a superalloy for high temperature applications MP1 - CoCrMo, a high performance steel MaragingSteel MSI, stainless steels or plastics.

By way of example, the first structure may also consist of a body whose outer shell is made of solid material and whose inner structure is constructed of a lattice network structure. By way of example, the first structure can also have a plurality of grid network structures which are separate from one another and / or have several different grid structures that are interconnected.

The structural combination can also be constructed in such a way that more than one cavity with the liquid filler is to be filled after the coating. As a result of the fact that more than one cavity is to be filled with the liquid filler, a number of further structures are formed, which can be moved relative to the first structure after the removal of the coating.

The coating of the grid structure of the first structure must be such that even after the coating, the disembodied areas of the unit cells are still connected to each other, whereby the coherent cavity is ^¬ forms, which can be filled with the filler. Since ^¬ by that the continuous cavity can be disposed within the Git ^¬ ternetzstruktur is further

Structure, which forms from the cured filler, arranged captive to the first structure. After the coating has been removed, relative movement of the further structure to the first structure and / or attachment of the further structure to the first structure is made possible.

Preferably, the further structure can be separated from the first structure without change in shape and / or without structural change. The shape of the first structure must be chosen such that by means of the coating surface and any additional moldings fillable with the filler cavity and simultaneously after Aushär ^¬ tion of the filler and after removal of the additional moldings and the coating a relative movement the further structure to the first structure and an abutment of the further structure at the abutment surface of the first structure is made possible and the abutment surface of the first structure ^¬ tur the movement of the further structure is not limited in all directions and / or all direction combinations, but a free movement in at least one of the directions

and / or one of the direction combinations allows, so that the further structure is separable from the first structure. Because the further structure can be separated from the first structure, maintenance processes can be carried out in an exemplary manner.

At least one region of the first structure is preferably formed surrounded by the further structure and / or at least one region of the further structure is formed by the first structure

Structure formed enclosed, whereby the further structure is captive to the first structure. Because at least one area of the further structure is formed enclosed by the first structure and / or at least one area of the first structure is enclosed by the further structure, the two structures are inseparably connected to one another and can be located within one another Structure surface be ^¬ bound stop surface in all directions and / or move in all direction combinations. However, a free movement, a release of the first structure of the further structure prevented. The fact that the free movement in all directions and / or in all direction combinations is prevented, but only the movement in all directions and / or in all combinations of directions within the abutment surface he ^¬ it is possible advantageously the positive or negative accelerations in all directions and / or are attenuated in all of the directional combinations by means of a compensating movement of the further structure and / or by means of an abutment against the abutment surface.

Has the first structural example of a grid structure on ^¬, the another structure that forms within the first structure, also have a more Gitternetzstruk- ture is. It forms a combination of structures consisting of two intertwined grid structures. The grid structures are captive to each other arranged, but can move relative to each other within the stop surface.

The cavity is preferably formed in sections with the coating tung-surface and / or in sections, with a Oberflä ^¬ che an additional molded part. Characterized in that the cavity is formed with the coating surface and / or with the surface of an additional molding, egg ^¬ ne even freer design of the cavity is made possible. The moldings make it possible to form a cavity which would not be moldable by means of the coating surface alone. Has the first structural example larger openings, through which the liquid filler could escape, whereby the big ^¬ ßeren openings by means of coating can not be closed, it can be CLOSED ^¬ sen by means of a filling body of which the surface characterized in combination with the coating Surface defines the cavity.

In the following, preferred embodiments of a structure combination according to the invention and of a method according to the invention for producing a vibration-damping structure combination are illustrated by means of schematic drawings.

FIG. 1 shows a schematic representation of a turbine blade.

Figure 2 shows a schematic representation of a cross section through the turbine blade shown in Figure 1, which has an embodiment of a structural ^combination according to the invention.

Figure 3 shows a schematic representation of an output ^¬ point of an embodiment of a method for Her ^¬ provide the structure combination.

FIG. 4 shows a schematic representation of a further method step for producing the structure combination. FIG. 5 again shows the method step illustrated in FIG.

FIG. 6 shows a schematic representation of a further method step for producing the structure combination.

FIG. 7 again shows the method step illustrated in FIG. FIG. 8 shows a schematic representation of a further method step for producing the structure combination.

FIG. 9 again shows the method step illustrated in FIG. 8, but in a different sectional plane.

Reference is first made to FIGS. 1 and 2.

Figures 1 and 2 show a turbine blade 11 of a ro ^¬ animal forming turbomachine.

The rotating turbomachine may be a turbine or even a compressor, each having a rotor with a plurality of blades and a stator with a plurality of vanes. The turbine blade 11 shown in Figures 1 and 2 is formed ^¬ in the present embodiment as a blade. Notwithstanding the present embodiment, the turbine blade 11 may also be formed as a guide vane. The turbine blade 11 has in the present Ausführungsbei ^¬ play on an airfoil 12, a platform 13 and a fastening portion Be ^¬ fourteenth

By means of the fastening section 14, the turbine window 11 can be connected to the rotor. Adjoining the attachment portion 14 is the platform 13 which separates the attachment portion 14 from the airfoil 12. The airfoil 12 has a blade leading edge 15, a blade trailing edge 16 and Blade cavities 17 on. The airfoil 12 extends from the platform 13 to a radially further outward or further inward end. The airfoil 12 of the flow of the turbine is exposed to and moves by way of example to a turbine axis of rotation of the turbine, while a fluid from the blade leading edge 15 along the blade 12 flows to the blade trailing edge 16. Un ^¬ terschiedliche flow rates can be exemplified vibrations of the blade 12 cause. The vibration constricting portions 10 of the airfoil 12 illustrate the movable front ^¬ lying embodiment masses 10. These vibrations can cause cracking or exacerbate an existing cracking process. The cracks can damage the airfoil 12, the turbine blade 11 and the entire turbine. In addition, the blade 12 is set in Be ^{¬ operation of} a high temperature ^load due to a high temperature of the air flow around the blade 12 ^¬ . In order to keep the temperature load of the blade 12 within the permissible range, the blade 12 has, for example, blade cavities 17, through which a cooling fluid can flow to cool the blade 12. FIG. 2 shows by way of example three blade cavities 17 through which the cooling fluid can flow. In the present embodiment, the blade cavities 17 serve, inter alia, to cool the blade 12.

During operation, vibrations of the turbine blade 11 may cause cracking or enhance an existing crack formation process.

In order to counteract this, a structural combination 18 for damping vibrations is provided in the blade cavity 17 in the present exemplary embodiment.

The structural combination 18 has in the present embodiment, a first structure 2 and a further structure 3, wherein the further structure 3 relative to the first Structure 2 is movable within the stop surface defined by the first structure surface 5 of the first structure 2. The abutment surface can be a boundary surface within which the further structure 3 can move to the first structure 2. In this case, according to the present invention, there does not necessarily have to be a "stop" or a mechanical contact According to one embodiment, a direct stop or mechanical contact between the first structure 2 and the further structure 3 does not occur.

The further structure 3 is interlaced with the first structure 2 in the present exemplary embodiment. In other words, the first structure 2 and the further structure 3 are captively connected to each other in the present embodiment. However, it is also conceivable that the further structure 3 of the first structure 2 solvable, i. is designed to be lost.

The occurring during operation of the turbine blade 11 oscillations ^¬ conditions are attenuated by the compensating movement and / or by the striking of the other structure 3 to the stop surface of the first structure. 2 In addition, the temperature load occurring during operation can continue to be effected by means of the flow of the cooling fluid through the blade cavities 17.

If the first structure 2, an example of a grid structure and across the entire blade height associated with the airfoil 12, one patch from the airfoil surface ^¬ made heat energy is conducted to the grid structure and there received by the passing cooling fluid. The grid structure increases the surface area at which the heat transfer can take place, as a result of which a larger amount of heat can be removed, as a result of which the temperature of the

Airfoil 12 can be lowered. In addition, will simultaneously attenuated by the further structure, the vibrations of the turbine blade 11 occurring.

By way of example, the entire turbine blade 11 can be produced by means of additive manufacturing methods, wherein the blade cavities 17 and / or additional co-manufactured

Structures serve as the first structure 2 in the context of the present invention. For example, the vane cavities 17 are filled with a lattice ^¬ network structure which is then coated with the vane cavity 17, thereby defining the cavity. 8 Subsequently, the filler 9 can be filled in the hollow space 8 ^¬ . The cured filler 9 forms the further structure 3 interwoven with the first structure 2. The removal of the coating 4 can then take place, for example, by means of an etching process, whereby the further structure 3 is movable relative to the first structure 2 and vibrations can thereby be damped.

Reference is now additionally made to FIGS. 3 to 9.

Figures 3 to 9 show process steps for manufacturing the vibration damping structure combination 18 for damping vibrations of movable masses 10, which are, in the present exemplary embodiment, portions of the ^turbine blade. 11 The finished structure ^combination 18 has a bottom plate 1, the first structure 2 with the first structure surface 5 and the further structure 3 with the further structure surface 7. As will be explained in detail later, a coating 4 with a coating surface 6 temporarily rests against the first structure surface 5 in the course of the process. The coating surface 6 defines a cavity 8 which is filled with a liquid filler. tel 9 is fillable, whereby the further structure 3 can be formed.

FIG. 3 shows the starting point of the method. The illustrated first structure 2 has been produced on the base plate 1 by way of example by means of additive manufacturing methods.

The bottom plate 1 and the first structure 3 are connected to each other and the bottom plate 1 limits the Strukturkombina ^¬ tion 18 in one direction. The first structure 2 has, for example, a grid structure. The exemplary Git ^¬ ternetzstruktur is to be produced by the additive manufacturing relatively easy and comparatively cost effective.

In a first method step, a coating 4 is applied to the first structure surface 5.

The coating can be carried out by way of example by means of a chemical vapor deposition, such as CVD, or a galvanization. The coating was performed such that the entire first structure surface is wetted 5 of the first structure 2 with loading ^¬ coating. 4 Unwanted uncoated ^{sections of} the first structure surface can lead to problems in the further course of the process.

FIG. 4 shows the first structure 2 after the coating process with which the coating 4 was applied to the first structure surface 5.

The coating 4 is applied to the first structure surface 5.

Figure 5 again shows the 4 with the coating ^¬ be coated first structure 2, wherein the coating surface 6 of the coating 4 defining the cavity. 8

In addition to the coating surface 6, additional surfaces of molded parts which adhere to the coating first structure 2 are arranged to define the cavity 8. The cavity 8 is formed such that a filling of the cavity 8 with the filler 9 is possible. It now follows in a further step, a filling of the cavity 8 with the filler. 9

6 shows the first structure 2 with the coating 4 and the filled with the filler 9 cavity 8. The filler 9 fills the cavity 8 is completely formed and there ^¬ by the further structure 3. Curing of the filler 9 can be exemplified by cooling the filler 9 when the filler 9 is a metal by way of example, or by burning the filler 9 when the filler 9 is, for example, a slurry. Depending ge ^¬ desired properties of the first structure 2 and the further structure 3, the respective materials used for the first structure 3 and the other structure 3 should be used. If it is desired by way of example that the further structure 3 is not electrically conductive, the further structure 3 should consist, for example, of a ceramic.

In other words, the figure 6, an intermediate product 19 for the production of the vibration damping structure combination is 18. In this case, the intermediate product 19 in the present From ^¬ guide for the first structure 2 with the first structural ^¬ tur-surface 5, which at least in sections a coating Surface 6 of a coating 4 is applied. The other structure surface 7 is situated at least partially on the coating surface 6 of the coating 4, where ^¬ removable at the coating 4, to make the additional structure 3 within a defined by the first structure surface 5 stop surface movable. Figure 7 again shows the first structure 2, the loading ^¬ coating 4 and the cured filler 9 that forms the white ^¬ tere structure. 3 The coating 4 prevents relative movement of the white ^¬ direct structure 3 relative to the first structure 2 and an abutment of the other structure 3 at the first surface structure 5. By means of the relative movement of the other structure 3 relative to the first structure 2 and the Stopping the further structure 3 to the first structure surface 5, the damping of vibrations of the moving masses 10 is made possible, however, this can be an example for the Trans ^¬ port or assembly of the structural combination hindering why the coating 4 after transport or the Assembly is removed in a further step. The Be ^¬ coating 4 can be exemplified removed by an etching process, egg ^¬ ner temperature treatment or other chemical or physical process.

FIG. 8 shows the structure combination 18 freed from the coating 4. As a result of the coating 4 having been removed, the further structure 3 is relative to the first one

Structure 2, within a defined by the first structure surface 5 stop surface 20 movable. The An ^¬ impact surface 20 is formed in the present embodiment, the ^¬ art that it limits a movement of the other structure 3 in the direction of all spatial axes x, y, z and direction combinations of all spatial axes. For this purpose, the stop surface 20 in the present embodiment is formed on all sides be ^¬ border. For example, the stop surface 20 is formed spherical surface-shaped We ^¬ sentlichen. The dimensions of the further structure 3 may be greater than the dimensions of the recesses in the respective extension direction.

FIG. 9 again shows the structure combination 18 with the first structure 2 and the further structure 3, wherein the first structure 2 is connected to the bottom plate 1 and the further structure 3 is interwoven with the first structure 2, but within that of the first structure Surface 5 defi ^¬ defined stop surface is movable. Furthermore, it can be seen in particular with reference to FIG. 9 that the structural combination 18 has a structure structure based on a unit cell 21. In other words, the structure combination 18 has a periodically repeating structure in its extension directions.

By forming with a plurality of unit cells 21, an increase in surface area in the area of the abutment surface 20 can be achieved, so that a particularly large contact area for force transmission is provided when the further structure 3 comes into contact with the first structure 2 during operation.

The bottom plate 1 and the first structure 2 are of the same material in the present embodiment. In other words, the bottom plate 1 and the first structure 2 are made of the same material or of materials having almost the same material properties. This ensures that, due to heating, no or only slight, thermally induced stresses form in the connection region between the bottom plate 1 and the first structure 2, since the respective thermal expansion coefficients are equal or nearly equal. The material of the coating 4 has a melting point and / or evaporation point and / or sublimation point which is below the respective melting point and / or evaporation point and / or sublimation point and / or an ashing temperature of the material of the base plate 1, the first structure 2 and the further structure 3 and the filler 9 is located.

By virtue of the fact that the first structure 2 is movable within the abutment surface defined by the first structure surface 5, vibrations which are triggered, for example, via positive or negative accelerations of the moved first structure 2 can be achieved by means of a compensating movement and / or by abutment of the other Structure surface 7 the further structure 3 are damped against the abutment surface of the first structure. This prolongs the life of the turbine blade 11. Although the invention in detail by preferred was examples further illustrated and described execution ^¬, so the invention is not limited by the disclosed examples and other variations can be derived by the skilled artisan from this, without the protection scope of the invention leave.

Claims

claims

1. A method for producing a vibration damping

Structure combination (18) for damping vibrations for movable masses (10) having a first structure (2) and a further structure (3), wherein the further structure (3) within one of a first structure surface (5) of ers ^¬ ten structure (2) defined stop surface (20) is movable, with the steps:

a) providing the first structure surface (5) on ^¬ facing first structure (2), at least in sections, a coating surface (6) of a coating (4) before ^¬ is;

b) coating the first structure surface (5) of the first structure (2) with the coating (4), wherein the coating surface (6) of the coating (4) at least one cavity (8) forming is applied;

c) filling the cavity (8) with the filler (9);

d) curing the filler (9) until the further structure (3) is formed with a further structure surface (7) which bears against the coating surface (6); and

e) removing the coating (4), whereby the further structure (3) is movable to the first structure (2) within the abutment surface defined by the first structure surface (5).

2. The method according to claim 1, wherein as the first structure (2) at least partially a mesh structure is provided.

3. The method according to claim 1 or 2, wherein the further

Structure (3) of the first structure (2) without change in shape and / or without structural change can be separated.

4. Method according to claim 1, 2 or 3, wherein at least one area of the first structure (2) is formed enclosed by the further structure (3) and / or at least one area of the further structure (3) is formed by the first structure (2). around- be formed, whereby the further structure (3) to the first structure (2) is captive.

5. The method according to any one of claims 1 to 4, wherein the cavity (8) in sections with the coating surface (6) and / or in sections with a surface of an additional molded ^¬ part is formed.

6. Intermediate product (19) for producing a vibration-damping structure combination (18), having a first structure (2), which has a first structure surface (5) which at least partially contacts a coating surface (6) of a coating (6). 4) and a further structure surface (7) having further structure (3), which is formed from a filled with a hardened filler (9) ^¬ filled cavity (8), wherein the further structure surface (7) at least sections of the coating ^¬ surface (6) of the coating (4), wherein the coating (4) is removable to the further structure (3) within one of the first structure surface (5) defi ^¬ ned stop surface ( 20) movable.

The intermediate product (19) according to claim 6, wherein the first structure (2) is at least partially a lattice network structure.

8. Intermediate product (19) according to claim 6 or 7, wherein the further structure (3) of the first structure (2) is separable without change in shape and / or without structural change.

9. intermediate (19) according to claim 6, 7 or 8, wherein said first structure (2) is designed such that it Minim ^¬ least encloses a region of the further structure (3) and / or the additional structure (3) is designed such in that it encloses at least a portion of the first structure (2), whereby the first structure (2) to the other

Structure (3) is captive as soon as the coating (4) is removed.

10. Intermediate product (19) according to any one of claims 6 to 9, wherein the filled with the cured filler (9) cavity (8) formed in sections with the coating surface (6) and / or in sections with a surface of an additional molding is.

A structural combination (18) for damping vibrations of movable masses (10), comprising a first movable structure (2) having a predetermined first inertia and having a first structural surface (5) formed as a stop surface (20) is, and with a mitbewegbaren further structure (3) which is formed from a filled with a cured filler (9) cavity (8), wherein the wei ^¬ tere structure (3) has a certain further inertia and ne ne further structure Surface (7) and the other

Structure (3) to the first structure (2) within the abutment surface defined by the first structure surface (5) be ^¬ movably, whereby vibrations which via positive and / or negative accelerations of the movable masses (10) are triggered bar , by a via the further inertia of the further structure (3) conditional compensating movement and / or by abutment of the further structure surface (7) of the further structure (3) to the stop surface (20) of the first structure (2) are attenuatable.

12. Structure combination (18) according to claim 11, wherein the first structure (2) is at least partially a structural grid ^¬ structure.

13. structure combination (18) according to claim 11 or 12, wherein the further structure (3) from the first structure (2) is separable without change in shape and / or without structural change.

14. The structure combination (18) according to claim 11, 12 or 13, wherein the first structure (2) is designed such that it encloses at least one area of the further structure (3) and / or the further structure (3) is formed in such a way. that it encloses at least one area of the first structure (2), whereby the first structure (2) is captive to the further structure (3).

15. structural combination (18) according to any one of claims 11 to 14, wherein the filled with the cured filler (9) filled ^¬ te cavity (8) in sections with the coating surface (6) and / or formed in sections with a surface of an additional molded part is.