Abstract:
An impulse element module for a turbomachine, in particular a turbine stage of a gas turbine, preferably an aircraft gas turbine, including a single-unit receptacle component having a base and side walls that extend peripherally thereon, the side walls and the base bounding a receiving space; a single-unit insert component having a form that is inserted into receiving space of receptacle component; together, the receptacle component and the insert component accommodated therein being designed to define a plurality of spaced apart cavities; and an impulse element, in particular a sphere, being accommodated in each cavity; and a single-unit sealing component that is joined in a material-to-material bond to the receptacle component in a way that allows the receiving space to be sealed and the insert component to be surrounded by the receptacle component and the sealing component.

Description:
[0001]    This claims the benefit of German Patent Application DE 10 2016 207 874.7, filed May 9, 2016 and hereby incorporated by reference herein. 
         [0002]    The present invention relates to an impulse element module for a component of a turbomachine, in particular for a turbine stage of a gas turbine, preferably an aircraft gas turbine. 
       BACKGROUND 
       [0003]    Due to the elasticity thereof, and excitation of the same by the working fluid, respectively gas circumflowing the same, blade assemblies, in particular rotor blade assemblies of gas turbines, tend to vibrate. Natural frequencies of the blades may be thereby excited, it being possible for thereby occurring resonances to lead to damage to the gas turbine, in particular to the blade assembly. 
         [0004]    In comparison with heretofore conventional dissipative frictional dampers, especially for what is generally referred to as detuning vibrations, WO 2012/095067 A1 describes a design where the impulse elements in a rotor blade influence the vibrations induced by impact contacts, particularly when the frequency nearly reaches the natural frequency. 
       SUMMARY OF THE INVENTION 
       [0005]    The assignee of the present invention has also developed designs for housings which accommodate a plurality of impulse elements, and for securing the housing, together with the impulse elements, in a corresponding installation space of a rotor blade assembly. 
         [0006]    It is an object of the present invention to provide an impulse element module having impulse elements accommodated therein that is readily manufacturable and has a simple structure. 
         [0007]    The present invention provides an impulse element module including a receptacle component featuring a single-unit design, that has a base and side walls extending peripherally thereon; the side walls and the base bounding a receiving space, and has an insert component featuring a single-unit design that is inserted into the receiving space of the receptacle component; together, the receptacle component and the insert component accommodated therein being designed to define a plurality of spaced apart cavities; and an impulse element, in particular a sphere, being accommodated in each cavity, and a sealing component, that is formed as a single unit, being joined in a material-to-material bond to the receptacle component in a way that allows the receiving space to be sealed, and the insert component to be surrounded by the receptacle component and the sealing component. The concept of a “single-unit sealing component” is intended to also include the case where the sealing component is built up additively on the insert component and/or the receptacle component and thus is already joined thereto in a material-to-material bond upon the formation thereof. 
         [0008]    The design presented here of an impulse element module makes it possible to manufacture two single-unit components at a time, that are joined to one another or are placed one inside of the other, thereby forming a plurality of cavities containing impulse elements. Joining the sealing component to the receptacle component in a material-to-material bond forms a closed box which securely accommodates the insert component and the impulse element. Since the sealing component is joined in a material-to-material bond to the receptacle component, one may also speak of a single-unit box that accommodates the insert component and the impulse element. An impulse element module having such a design may be variably inserted into a corresponding depression on a blade assembly of a compressor stage or a turbine stage of a gas turbine. Such a depression thereby preferably has an inner contour whose form essentially complements the outer contour of the impulse element module. 
         [0009]    The insert component may have a terminating wall which, in the inserted state of the insert component in the receptacle component, seals the receiving space. By the outer side thereof facing away from the receiving space, the terminating wall may thereby essentially end flush with at least one front face of the surrounding side walls of the receptacle component. Thus, the terminating wall, in particular the outer side thereof and the front face(s) of the side walls essentially form a common, continuous plane. The sealing element may be configured on the front face(s) of the side walls and the outer side of the terminating walls. 
         [0010]    At the inner side thereof facing the receiving space, the terminating wall may have a plurality of webs, in particular longitudinal webs and transverse webs, that project from the inner side. In the inserted state, these webs form separating walls in order to bound the plurality of cavities. 
         [0011]    The base and the side walls of the receptacle component may essentially have a flat form on the inner surfaces thereof facing the receiving space. 
         [0012]    In addition, the insert component may have a plurality of longitudinal webs and transverse webs that form a grid-like structure, the longitudinal webs and the transverse webs, together with at least one of the inner surfaces of the base or of the side walls, bounding the plurality of cavities, at least in portions thereof. 
         [0013]    Alternatively, on the inner surface thereof facing the receiving space, the base may have a plurality of webs, in particular longitudinal webs and transverse webs that project into the receiving space in a way that allows the webs and the inner surface of the base to form a partial volume of the plurality of cavities. 
         [0014]    The webs of the insert component and the webs of the receptacle component may be configured in a way that allows front faces of the webs of the insert component and front faces of the webs of the receptacle component to rest against each other in the inserted state of the insert component, in a way that allows the plurality of cavities to be bounded by the webs of the insert component, the webs of the receptacle component, the inner surface of the base, and the inner side of the terminating wall. 
         [0015]    In addition, the sealing component may be joined in a material-to-material bond to the terminating wall of the insert component. 
         [0016]    In the case of such an impulse element module, the receptacle component, the insert component and the sealing component may be additively manufactured, in particular by a selective laser melting process. 
         [0017]    Alternatively or additionally, it may also be borne in mind that the receptacle component and/or the insert component and/or the sealing component are/is at least partially manufactured in a machining process, such as electrochemical machining, or in a powder metal injection molding process. A machining process may also be optionally used in addition to or subsequently to an additive process, for instance, to smooth the outer contour of the impulse element module. 
         [0018]    Another aspect of the present invention also relates to a method for manufacturing an impulse element module for a turbomachine, in particular for a turbine stage of a gas turbine, including the steps of: 
         [0019]    manufacturing a receptacle component by building up the same layer by layer using an additive manufacturing process, in particular a selective laser melting process, the receptacle component having a base and side walls extending peripherally thereon; the side walls being built up starting from the base in a way that allows a receiving space to be formed within the side walls; 
         [0020]    manufacturing an insert component that is grid-like at least in portions thereof by building up the same layer by layer using an additive manufacturing process, in particular a selective laser melting process; 
         [0021]    inserting the insert component into the receiving space of the receptacle component; prior to or during the insertion, impulse elements, in particular spheres, being inserted into cavities that are jointly formed by the receptacle component and the insert component; 
         [0022]    using an additive manufacturing process, in particular a selective laser melting process, to build up a sealing component layer by layer on the receptacle component having the insert component inserted therein, to mutually join the receptacle component and the sealing component in a material-to-material bond and form a single-unit enclosure for the insert component and the impulse elements contained therein. 
         [0023]    The present invention also relates to a rotor blade assembly of a compressor stage or of a turbine stage of a gas turbine, the rotor blade assembly having a depression into which an above described impulse element module is inserted, the depression preferably being provided in a rotor blade root region. A rotor blade assembly is thereby understood to be a single rotor blade or a rotor blade segment having a plurality of rotor blades. 
         [0024]    Finally, the present invention also relates to a gas turbine, in particular an aircraft gas turbine having a plurality of compressor stages and a plurality of turbine stages, it featuring at least one above described impulse element module that is associated with a compressor stage or a turbine stage. A plurality of impulse element modules may thereby be associated with a rotor component, in particular a rotor blade ring, a compressor stage or a turbine stage, a single impulse element module preferably being associated with a single rotor blade assembly of the rotor blade ring. 
         [0025]    The present invention will be explained exemplarily in the following with reference to the enclosed figures and without being limited thereto. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]    Directional indications, such as “axial,” “axially,” “radial,” “radially,” and “circumferential” are basically to be understood relative to the machine axis of the gas turbine, unless explicitly or implicitly indicated otherwise from the context. 
           [0027]      FIG. 1  shows a first specific embodiment of a receptacle component of an impulse element module in a perspective view ( FIG. 1A ) and in a plan view ( FIG. 1B ). 
           [0028]      FIG. 2  shows a first specific embodiment of an insert component for the receptacle component of  FIG. 1  in a perspective view. 
           [0029]      FIG. 3  shows, in a perspective view, the receptacle component of  FIG. 1  including the insert component of  FIG. 2  inserted. 
           [0030]      FIG. 4  shows the receptacle component closed by a sealing component. 
           [0031]      FIG. 5  shows a second specific embodiment of a receptacle component of an impulse element module in a perspective view. 
           [0032]      FIG. 6  shows a second specific embodiment of an insert component for the receptacle component of  FIG. 1  in a plan view. 
           [0033]      FIG. 7  shows a sectional view of the impulse element module of the second specific embodiment including the sealing component mounted thereon. 
           [0034]      FIG. 8  shows the impulse element module of the second specific embodiment in a perspective, external view. 
           [0035]      FIG. 9  shows a third specific embodiment of an impulse element module in a sectional view similar to  FIG. 7 . 
           [0036]      FIG. 10  shows a fourth specific embodiment of an impulse element module in a sectional view similar to  FIG. 7 or 9 . 
       
    
    
     DETAILED DESCRIPTION 
       [0037]    A first specific embodiment of an impulse element module is described with reference to  FIG. 1 through 4 . The following explanations regarding  FIG. 1A  also apply to  FIG. 1B . In a perspective view,  FIG. 1A  shows a receptacle component  12  of an impulse element module  10  that is illustrated in  FIG. 4  in the ready-for-use state thereof. Receptacle component  12  features a single-unit design and has a base  14  that may also be referred to as a bottom. Base  14  has a visible inner surface  16  and an outer surface that is not visible in  FIG. 1 through 4 . Side walls  18   a ,  18   b  and  20   a ,  20   b  are joined to base  14 . Side walls  20   a ,  20   b  may be referred to as longitudinal walls, and side walls  18   a ,  18   b  as transverse walls. In the plan view, receptacle component  12  has an essentially rectangular shape; it being possible for the corners to have a rounded or beveled form. For  FIG. 1  and all further figures, the coordinate system illustrated in  FIG. 1  is used, where the X direction corresponds to the transverse direction, the Y direction to the longitudinal direction, and the Z direction (orthogonal to the X and Y directions) corresponds to a vertical direction. This coordinate system also applies analogously to all further figures. 
         [0038]    A plurality of webs  22 ,  24 , which project upwardly from inner surface  16 , are provided on base  14 . In  FIG. 2 , this corresponds to a direction that is orthogonal to the drawing plane. Webs  22 ,  24  may also be referred to as ribs. Webs  24  extend longitudinally and, accordingly, may also be referred to as longitudinal webs. Webs  22  extend transversely and, accordingly, may also be referred to as transverse webs. Longitudinal webs  24  and transverse webs  22  intersect in a plurality of intersection regions  26 .  FIG. 2  shows respective faces  28  of longitudinal webs  24  and transverse webs  22 . Faces  28  reside at a height or a level that is lower than visible front-face rim  30  of side walls  18   a ,  18   b ,  20   a ,  20   b . Base  14  and side walls  18   a ,  18   b ,  20   a ,  20   b  bound a receiving space  32 . Longitudinal webs  24  and transverse webs  22  form a plurality of cavities  34 , respectively partial volumes of cavities  34  in receiving space  32 . Thus, together with base  14  and side surfaces  18   a ,  18   b ,  20   a ,  20   b , longitudinal webs  24  and transverse webs form individual compartments, respectively subcompartments. Cavities  34  are used for accommodating a respective impulse element  36 , which, in particular, may be in the form of a sphere. In  FIGS. 1A and 1B , only one impulse element  36  is shown exemplarily in each instance in a cavity  34 . However, the finish-machined component effectively has an impulse element, preferably in the form of a sphere, in each of the eight cavities  34  provided in this exemplary embodiment. 
         [0039]    In a perspective view,  FIG. 2  shows an insert component  42  in a single-unit form that is insertable into receptacle component  12 , in particular into receiving space  32  thereof, respectively is inserted in the ready-for-use state. In the first specific embodiment, the insert component features a terminating wall  44 .  FIG. 2  shows inner side  46  of terminating wall  44 ; in the assembled state, this inner side  46  facing inner surface  16  of base  14 . Insert component  42  likewise features a plurality of webs  48 ,  50 , which are configured on terminating wall  44 . Webs  48  form transverse webs, and webs  50  longitudinal webs. Longitudinal webs  50  and transverse webs  48  intersect in intersection regions  52 . Longitudinal webs  50  and transverse webs  48  feature a front face  54 . Upon insertion of insert component  42  into receptacle component  12  ( FIG. 1 ), respective front faces  54  rest against faces  28 . This closes cavities  34  illustrated in  FIG. 1 . A single cavity  34  is then bounded by base  14 , webs  22 ,  24  and side walls  18   a ,  18   b ,  20   a ,  20   b  of the receptacle component, as well as by terminating wall  44  and webs  48 ,  50  of insert component  42 . Terminating wall  44  thereby rests by inner side  46  thereof on a peripherally disposed inner rim  56  of receptacle component  12 . In addition, terminating wall  44  has a peripheral contour whose form complements the inner periphery of receiving opening  32 . In other words, inserting insert component  42  into receptacle component  12  covers or seals receiving space  32  by an interlocking fit, so that impulse elements  36  contained in cavities  34  are only able to still move within respective cavity  34  thereof. 
         [0040]    In a perspective view,  FIG. 3  shows the state when insert component  42  is inserted into receptacle component  12 . It is also apparent from this illustration that an outer surface  58  of terminating wall  44  essentially ends flush with front-face rim  30  of peripheral side walls  18   a ,  18   b ,  20   a ,  20   b . In this state, front-face rim  30  and terminating wall  44  form an essentially continuous plane or surface. 
         [0041]    In a perspective view,  FIG. 4  shows finish-machined impulse element module  10 ; receptacle component  12  having insert component  42  inserted (see  FIG. 3 ), and impulse elements  36  ( FIG. 1 ) contained in cavities  34  ( FIG. 1 ) being sealed by a sealing component  62 . Sealing component  62  may also be referred to as a cover. Sealing component  62  is at least joined in a material-to-material bond to side walls  18   a ,  18   b ,  20   a ,  20   b  of receptacle component  12 . It may also be additionally joined, however, in a material-to-material bond to terminating wall  44  ( FIG. 3 ) of insert component  42 . 
         [0042]    An additive manufacturing process, in particular a selective laser melting process, is preferably used to produce the first specific embodiment of an impulse element module  10  presented in  FIG. 1 through 4  having the respective single-unit components: receptacle component  12 , insert component  42  and sealing component  62 . Beginning with a first layer of base  14 , receptacle component  12  is thereby built up layer by layer in vertical or Z direction ( FIG. 1 ). Starting from a first layer of terminating wall  44 , insert  42  is built up layer by layer in vertical or Z direction ( FIG. 2 ). Upon insertion of single-unit insert component  42  into receiving opening  32  of receptacle component  12 , impulse elements  36  are inserted into respective cavities  34 . Starting from a state in accordance with  FIG. 3 , sealing component  62  is manufactured layer by layer on the not yet completely finish-machined impulse element module  10  using the additive process, in particular the selective laser melting process. A first powder layer is thereby applied to the continuous surface or plane ( FIG. 3 ) formed by front-face rim  30  and outer side  58  of terminating wall  44  and then joined in a material-to-material bond. Thus, impulse element module  10 , produced in this manner, features a structure that is simple to manufacture and that is closed in a stress-free manner. In particular, no unwanted stresses occur either, as can arise when working with conventional covers, for instance covers that employ a form-locking connection (snap-fit connection or the like). Since the same material and the same manufacturing method are used for all three components: namely receptacle component  12 , insert component  42  and sealing component  62 , a homogeneously constructed impulse element module is attained where the individual components have the same material properties. 
         [0043]    This type of manufacturing of impulse element module  10  according to the present invention makes it possible to ensure that impulse elements  36  are enclosed airtight in associated cavities  34  and that no gas from the outside is able to seep in to reach them. This is of particular importance when impulse element module  10  is to be used in the hot gas zone of the turbomachine, thus, for example, on a blade assembly in the turbine section of the turbomachine. Sealing impulse elements  36  airtight in cavities  34  protects them from wear caused by hot gas oxidation and/or sulfidation. 
         [0044]    Furthermore, the previously described manufacturing method makes possible a low-cost mass production. Impulse element modules  10  are relatively small. Thus, in practice, depending on the field of application, the dimension of the longest side thereof, thus of the longitudinal or Y direction side, is, at most, a few centimeters, preferably less than two centimeters, and more preferably between one and 1.5 centimeters. Thus, generally, the installation space of a conventional SLM machine allows the concurrent manufacturing of several hundred receptacle components  12  and several hundred inserts  42 . 
         [0045]    Preferred materials for manufacturing receptacle components  12 , insert components  42 , and sealing component  62  may be: Haynes 230, Inco 718, Hastelloy X, MARM 247, MARM 247 LLDS, MARM 509. Besides these preferred materials, other materials suited for additive manufacturing methods may also be used. 
         [0046]    A second specific embodiment of an impulse element module  110  is described with reference to  FIG. 5 through 8 .  FIG. 5  is a perspective view of receptacle component  112 . This receptacle component  112 , as well, includes a base  114  and side walls  118   a ,  118   b ,  120   a ,  120   b  that are joined to base  114 . Base  114  and side walls  118   a ,  118   b ,  120   a ,  120   b  bound receiving space  132 . On inner side thereof, which is not visible in  FIG. 5  and faces receiving space  132 , base  114  is essentially plane or flat. Thus, in contrast to the specific embodiment of  FIG. 1 through 4 , it does not have any webs or ribs. 
         [0047]    In a plan view,  FIG. 6  shows an insert component  142  that may be inserted or introduced into receiving space  132  of receptacle component  112  ( FIG. 5 ) (in the double arrow direction). Insert component  142  includes a plurality of webs  148 ,  150 . Webs  148  may thereby be referred to as transverse webs, and webs  150  as longitudinal webs. Longitudinal webs  150  and transverse webs  148  intersect in intersection regions  152 . Webs  148 ,  150  bound respective chambers or cavities  134 . In other words, it may be said that insert component  142  has a grid-like design or is a grid having a plurality of chambers or cavities  134 . Longitudinal webs  150 , which, in  FIG. 6 , are interconnected on the left side, form a continuous supporting surface  164 , which, in the state of insert component  142  being inserted in receptacle component  112 , rest on the inner surface of base  114 . Longitudinal webs  150 , which, in  FIG. 6 , are interconnected on the right side, form a continuous terminating wall  144 . 
         [0048]    In a cross-sectional view corresponding approximately to a line of intersection VII-VII of  FIG. 5 ,  FIG. 7  shows the assembled state of impulse element module  110 . Receptacle component  112  has insert component  142  inserted therein. Upon insertion of insert component  142 , cavities  134  are bounded by the respective inner sides of side walls  120   a  and  120   b , so that each cavity  134  is closed separately. An impulse element  136 , preferably in the form of a sphere, is inserted in each cavity, only one sphere  136  in cavity  134  being shown exemplarily at the lower left of  FIG. 7 . From this illustration, it is also apparent that an outer surface  158  of terminating wall  144  essentially ends flush with front-face rim  130  of peripheral side walls  118   a ,  118   b  (visible in the cross-sectional view) and  120   a ,  120   b  (not visible in the cross-sectional view). In this state, front-face rim  130  and terminating wall  144  form an essentially continuous plane or surface. 
         [0049]    It is readily apparent from  FIGS. 7 and 8  that receptacle component  112  is sealed by a terminating sealing component  162 . Sealing component  162  may also be referred to as a cover. Sealing component  162  is at least joined in a material-to-material bond to side walls  118   a ,  118   b ,  120   a  (not visible),  120   b  of receptacle component  12 . It may also be additionally joined, however, in a material-to-material bond to terminating wall  144  of insert component  142 . 
         [0050]    An additive manufacturing process, in particular a selective laser melting process, is preferably used to produce the second specific embodiment of an impulse element module  110  presented in  FIG. 5 through 8  having the respective single-unit components: receptacle component  112 , insert component  142  and sealing component  162 . Beginning with a first layer of base  114 , receptacle component  112  is thereby built up layer by layer in transverse or X direction ( FIG. 5 ,  FIG. 7 ). Starting from a first layer, insert  142  is built up layer by layer in vertical or Z direction ( FIG. 5 ,  FIG. 6 ). Upon insertion of single-unit insert component  142  into receiving opening  132  of receptacle component  112 , impulse elements  136  are inserted into respective cavities  134 . Starting from a state in which insert component  142  is inserted into receptacle component  112 , sealing component  162  is manufactured layer by layer on the not yet completely finish-machined impulse element module  110  using the additive process, in particular the selective laser melting process. A first powder layer is thereby applied to the continuous surface or plane ( FIG. 7 ) formed by front-face rim  130  and outer side  158  of terminating wall  144  and then joined in a material-to-material bond. Thus, impulse element module  110 , produced in this manner, features a structure that is simple to manufacture and that is closed in a stress-free manner. In particular, no unwanted stresses occur either, as can arise when working with conventional covers, for instance covers that employ a form-locking connection (snap-fit connection or the like). Since the same material and the same manufacturing method are used for all three components: namely receptacle component  112 , insert component  142  and sealing component  162 , a homogeneously constructed impulse element module is attained, where the individual components have the same (material) properties. 
         [0051]    In a sectional view similar to  FIG. 7 ,  FIG. 9  shows a third specific embodiment of an impulse element module  210 . Here, transverse webs  248  are formed on base  214 , so that partial volumes of cavities  234  are bounded by base  214  and these transverse webs  248 . Insert component  242  features known longitudinal webs  250  and transverse webs  248 . Longitudinal webs  250  located on the left side in  FIG. 9  form a continuous supporting surface  264  supported on transverse webs  248  of receptacle component  212 . Insert component  242  may also be described as corresponding more or less to a halved insert component  142  of the second specific embodiment ( FIG. 6 , right half). Longitudinal webs  250  illustrated on the right side in  FIG. 9  form a continuous terminating wall  244 . The four cavities  234  on the left in  FIG. 9  are each bounded by base  214  and transverse webs  222  of receptacle component  212 , as well as by continuous supporting surface  264  of insert component  242 . The right four cavities  234  are part of insert component  242  and are bounded by transverse webs  248  and longitudinal webs  250  thereof. 
         [0052]    It is also readily apparent from this illustration that an outer surface  258  of terminating wall  244  essentially ends flush with front-face rim  230  of peripheral side walls  218   a ,  218   b  (visible in the cross-sectional view). In this state, front-face rim  230  and terminating wall  244  form an essentially continuous plane or surface. 
         [0053]    From  FIG. 9 , it is readily apparent that receptacle component  212  is sealed by a terminating sealing component  262 . Sealing component  262  may also be referred to as a cover. Sealing component  262  is at least joined in a material-to-material bond to side walls  218   a ,  218   b  (and to the further side walls (not shown), analogously to the previous specific embodiments) of receptacle component  212 . It may also be additionally joined, however, in a material-to-material bond to terminating wall  244  of insert component  242 . 
         [0054]    In a sectional view similar to  FIG. 9 ,  FIG. 10  shows a fourth specific embodiment of an impulse element module  310 . Here, no transverse or longitudinal webs are formed on base  314 . Insert component  342  features known longitudinal webs  350  and transverse webs  348 . The left three transverse webs are supported by the unattached ends, respectively end faces thereof on base  314  of receptacle component  312 . Longitudinal webs  350  illustrated on the right side in  FIG. 10  form a continuous terminating wall  344 . The four cavities  334  on the left in  FIG. 10  are bounded respectively by base  314  and partially by side walls  318   a ,  318   b  of receptacle component  212 , as well as by transverse webs  348  and longitudinal webs  350  of insert component  342 . The right four cavities  334  are bounded by transverse webs  348  and longitudinal webs  350  of insert component  342  and partially by side walls  318   a ,  318   b  of receptacle component  312 . 
         [0055]    It is also readily apparent from this illustration that an outer surface  358  of terminating wall  344  essentially ends flush with front-face rim  330  of peripheral side walls  318   a ,  318   b  (visible in the cross-sectional view). In this state, front-face rim  330  and terminating wall  344  form an essentially continuous plane or surface. 
         [0056]    From  FIG. 10 , it is readily apparent that receptacle component  312  is sealed by a terminating sealing component  362 . Sealing component  362  may also be referred to as a cover. Sealing component  362  is at least joined in a material-to-material bond to side walls  318   a ,  318   b  (and to the further side walls (not shown), analogously to the previous specific embodiments) of receptacle component  312 . It may also be additionally joined, however, in a material-to-material bond to terminating wall  344  of insert component  342 . 
         [0057]    With regard to manufacturing using an additive process, the second specific embodiment, described with reference to  FIG. 5 through 8 , likewise applies to the third and fourth specific embodiments. In this regard, reference is also made to the corresponding description above; in the context of  FIGS. 9 and 10 , it being conceivable to simply replace the reference numerals having a leading “1” with those having a leading “2” or “3.” 
         [0058]    Impulse element modules  10 ,  110 ,  210 ,  310  presented here may be used as vibration dampers in components of a turbomachine, in particular in rotor blade assemblies of a gas turbine. For this purpose, a rotor blade assembly may have a depression into which an impulse element module  10 ,  110 ,  210 ,  310  may be introduced and secured. The depression may thereby be formed, in particular, to essentially complement an outer contour of impulse element module  10 ,  110 ,  210 ,  310 . This makes it possible to also achieve a type of interlocking connection between impulse element module  10 ,  110 ,  210 ,  310  and the component of the turbomachine, in particular of the rotor blade assembly. A rotor blade assembly is thereby understood to be a single rotor blade or a combined group of rotor blades. An impulse element module  10 ,  110 ,  210 ,  310  may thereby be provided, in particular, in a depression  1150  of a root region  1000  of a rotor blade assembly  1100  of a turbine or compressor stage  1200  of an aircraft turbine gas engine  1300  with a plurality of compressor and turbine stages, as shown schematically in  FIG. 8 , preferably a single impulse element being associated with a single rotor blade assembly  1100  associated with a rotor blade ring also shown schematically as  1400 . The impulse element modules presented here, produced as single-unit components, may be readily manufactured and easily handled when attached to a rotor blade assembly. It is also very simple to replace such impulse element modules, for instance in the course of maintenance operations. Altogether, an impulse element module for damping impact vibrations in a gas turbine is attained that is readily manufactured and easily manipulated. 
       LIST OF REFERENCE NUMERALS 
       [0000]    
       
         
           
               10 ,  110 ,  210 ,  310  impulse element module 
               12 ,  112 ,  212 ,  312  receptacle component 
               14 ,  114 ,  214 ,  314  base 
               16  inner surface 
               18   a ,  118   a ,  218   a ,  318   a  side wall 
               18   b ,  118   b ;  218   b ;  318   b  side wall 
               20   a ,  120   a  side wall 
               20   b ,  120   b  side wall 
               22 ,  222  transverse web 
               24  longitudinal web 
               26  intersection region 
               28  face 
               30 ,  130 ,  230 ,  330  front-face rim 
               32 ,  132 ,  232 ,  332  receiving space 
               34 ,  134 ,  234 ,  334  cavity 
               36 ,  136 ,  236 ,  336  impulse element 
               42 ,  142 ,  242 ,  342  insert component 
               44 ,  144 ,  244 ,  344  terminating wall 
               46 ,  146 ,  246 ,  326  inner side 
               48 ,  148 ,  248 ,  348  transverse web 
               50 ,  150 ,  250 ,  350  longitudinal web 
               52 ,  152  intersection region 
               54  front face 
               56  inner rim 
               58 ,  158 ,  258 ,  358  outer surface 
               62 ,  162 ,  262 ,  362  sealing component 
               1000  root region 
               1100  turbine blade assembly 
               1150  depression 
               1200  turbine or compressor stage 
               1300  aircraft turbine jet engine 
               1400  rotor blade ring