Gas turbine blade impulse body module

Abstract

The present invention relates to an impulse body module group with at least two impulse body modules, which, in particular, are identical in construction, for a gas turbine blade, wherein each of the impulse body modules comprises a housing, which, in particular, is of one piece and which has a first cavity, which is closed, in particular in an airtight manner, by a first cover, which is joined to the housing, in particular in a material-bonded manner, and in which a single, in particular spherical or cylindrical, first impulse body is accommodated with play of movement in at least one first direction of impact, wherein the housing has no additional cavity or a single additional cavity, in which a single, in particular spherical or cylindrical, additional impulse body is accommodated with play of movement in at least one direction of impact.

Claims

1. An impulse body module group with at least two impulse body modules, which are identical in construction, for a gas turbine blade, wherein each of the impulse body modules comprises a housing, which is of one piece and which has a cavity, which is closed in an airtight manner, by a cover, which is joined to the housing in a material-bonded manner, and in which a single spherical or cylindrical impulse body is accommodated with play of movement in at least one first direction of impact, wherein the housing of each of the impulse body modules has no additional cavity and has no additional spherical or cylindrical impulse body accommodated with play of movement in at least one direction of impact, and wherein at least two impulse body modules are joined together in a non-destructive detachable manner, in a permanent manner, in a friction-fitting manner, in a form-fitting manner, in a material-bonded manner, by at least one clamping element, are arranged one above the other in the first direction of impact or are arranged next to one another transverse to the first direction of impact.

2. The impulse body module group according to claim 1, wherein the at least two impulse body modules are a first impulse body module, having a first cover, and a second impulse body module, having a second cover; the first cover and the second cover being located on opposite sides of the impulse body module group relative to each other.

3. The impulse body module group according to claim 1, wherein the housing and/or the cavity have at least one plane of symmetry and is cylindrical or cuboid in shape.

4. The impulse body module group according to claim 1, wherein the cover is centered at the housing in a form-fitting manner or rests or rest flat on the housing.

5. The impulse body module group according to claim 1, wherein a selected wall thickness of the cavity of the housing varies by at most 25% relative to any wall thickness of the cavity of the housing or the wall thickness of the cavity of the housing is at least 1% and at most 50% of a diameter of the impulse body accommodated in it.

6. The impulse body module group according to claim 1, wherein a play of movement of the impulse body in the respective direction of impact in the cavity in which it is accommodated is at least 1% and/or at most 500% of its diameter, and/or at least two times and/or at most one-hundred times a play of movement in a guiding direction transverse to this direction of impact.

7. The impulse body module group according to claim 1, wherein the impulse body modules are arranged in an L shape, in a C shape, in a ring shape, a rectangular and/or square ring shape, or in a shape that is formed from two or more suchlike shapes.

8. The impulse body module group according to claim 1, wherein the impulse body module group comprises at least one first impulse body module group and at least one second impulse body module group, the at least one first impulse body module group and the at least one second impulse body module group are configured as an assembly, wherein the at least one first impulse body module group and the at least one second impulse body module group have different numbers of impulse body modules each of which are identical in construction.

9. The impulse body module group according to claim 1, wherein the impulse body module group is configured in a gas turbine blade and arranged at an outer or inner shroud.

10. The impulse body module group according to claim 1, wherein the impulse body module group is arranged in a cavity of the gas turbine blade and/or is fastened in a friction-fitting manner, in a form-fitting manner, and/or in a material-bonded manner, and/or by the at least one clamping element.

11. The impulse body module group according to claim 1, wherein the impulse body module group is configured and arranged in an assembly for reducing vibrations of a plurality of gas turbine blades.

12. The impulse body module group according to claim 1, wherein the cavity of each of the impulse body modules is produced by machining, electrical material removal, primary shaping, or extrusion; and the housing is produced from bar material, wherein the impulse body module group, is arranged in a cavity of the gas turbine blade.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

(1) Other advantageous enhancements of the present invention ensue from the dependent claims and the following description of preferred embodiments. Shown partially schematically for this purpose are:

(2) FIG. 1 shows an impulse body module in accordance with an embodiment of the present invention in a section along a direction of impact;

(3) FIG. 2 shows an impulse body module in accordance with another embodiment of the present invention in an illustration corresponding to FIG. 1;

(4) FIG. 3 shows an impulse body module group in accordance with an embodiment of the present invention in an illustration corresponding to FIG. 1;

(5) FIG. 4 shows an impulse body module group in accordance with another embodiment of the present invention in an illustration corresponding to FIG. 3;

(6) FIG. 5 shows a gas turbine blade with an impulse body module group in accordance with an embodiment of the present invention in a partial section;

(7) FIG. 6 shows an impulse body module in accordance with another embodiment of the present invention in an illustration corresponding to FIG. 1;

(8) FIG. 7 shows a gas turbine blade with an impulse body module group in accordance with another embodiment of the present invention in an illustration corresponding to FIG. 5; and

(9) FIGS. 8a, 8b and 8c show impulse body module groups with various shapes in accordance with another embodiment of the present invention.

DESCRIPTION OF THE INVENTION

(10) FIG. 1 shows an impulse body module in accordance with an embodiment of the present invention in a section along a first direction of impact S.

(11) The impulse body module has a one-piece housing 1 with a first, single cavity 2, which is closed in an airtight manner by a first cover 3, which is joined to the housing 1 in a material-bonded manner by way of a girth weld 13 and in which a first, single impulse body 4 is accommodated with play of movement in the first direction of impact S.

(12) The housing is cylindrical in shape (whereby the long axis of the cylinder corresponds to the first direction of impact S) or cuboid in shape and correspondingly has a plurality of symmetry planes.

(13) The first cover 3 is centered at the housing 1 in a form-fitting manner by means of a collar, which engages in the cavity 2.

(14) FIG. 2 shows, in an illustration corresponding to FIG. 1, an impulse body module in accordance with another embodiment of the present invention. Features that correspond to one another are identified by identical reference numbers, so that reference is made to the preceding description and only differences are addressed below.

(15) In the embodiment of FIG. 2, the housing has a single additional cavity 20, in which a single additional impulse body 40 is accommodated with play of movement in the first direction of impact S and which is closed in an airtight manner by an additional cover 30, which lies opposite the first cover 3 and is joined to the housing 1 by another girth weld 13 in a material-bonded manner.

(16) The two cavities 2, 20 are or will undergo primary shaping by forward-backward cup extrusion and, in an alternative embodiment, by a machining or material removal method.

(17) FIG. 3 shows an impulse body module group in accordance with an embodiment of the present invention in an illustration corresponding to FIG. 1. Features that correspond to one another are further identified by identical reference numbers, so that reference is made to the preceding description.

(18) The impulse body module group of FIG. 3 is composed of two of the impulse body modules, as were explained above with reference to FIG. 1. They are or will be arranged next to one another transverse to the first direction of impact and joined together by a band clamp 5.

(19) As indicated in FIG. 3 in dashes, an impulse body module group can also have additional impulse body modules, which, in particular, are identical in construction. In particular, the impulse body module group of FIG. 3, which is composed of two or more impulse body modules, can be a first impulse body module group, and a second impulse body module group that is identical in construction to the first group can have a number of identical impulse body modules that differs therefrom. These different impulse body module groups can be used to equip different gas turbine blades.

(20) FIG. 4 shows, in an illustration corresponding to FIG. 3, an impulse body module group in accordance with another embodiment of the present invention. Features that correspond to one another are identified by identical reference numbers, so that reference is made to the preceding description and only differences are addressed below.

(21) In the embodiment of FIG. 4, two or—as indicated once again in dashes—more of the impulse body modules, as explained above with reference to FIG. 1, are or will be arranged one above the other in the first direction of impact and joined to one another by welding, soldering, adhesive bonding, clamping, or the like to form the impulse body module group.

(22) FIG. 5 shows a gas turbine blade 10 with an impulse body module group in accordance with an embodiment of the present invention in a partial section.

(23) This impulse body module group corresponds in principle to the embodiments in accordance with FIG. 3, whereby, however, the two impulse body modules are rotated by 180° with respect to each other in order to illustrate the diversity of variants that can be realized.

(24) The impulse body module group is arranged in a cavity 12 of an outer shroud 11 of the gas turbine blade 10 and is fastened in it in a friction-fitting manner by the band clamp 5, which thus advantageously fulfills a dual function and simultaneously serves as a spring element fastening the impulse body module group to the gas turbine blade.

(25) FIG. 6 shows, in an illustration corresponding to FIG. 1, an impulse body module in accordance with another embodiment of the present invention. Features that correspond to one another are identified by identical reference numbers, so that reference is made to the preceding description and only differences are addressed below.

(26) In the embodiment of FIG. 6, the cavity 2 is cube-shaped with rounded or chamfered edges or inner contours, whereby one of the three symmetry planes defines the first direction of impact.

(27) The cover 3 rests flat on housing 1 or without form fit.

(28) FIG. 7 shows, in an illustration corresponding to FIG. 5, a gas turbine blade with an impulse body module group in accordance with another embodiment of the present invention. Features that correspond to one another are identified by identical reference numbers, so that reference is made to the preceding description and only differences are addressed below.

(29) In the embodiment of FIG. 7, the cavity 12 is closed by a sealing cover 14, which is welded, soldered, or adhesively bonded to the gas turbine blade.

(30) FIGS. 8a, 8b and 8c show three different embodiments of an impulse body module group, namely in an L shape (FIG. 8a)), in a C shape (FIG. 8b)), and in a square ring shape (FIG. 8c)).

(31) Even though exemplary embodiments have been explained in the preceding description, it is noted that a large number of modifications are possible.

(32) Thus, in particular, instead of the impulse body module of FIG. 1 in the embodiments of FIGS. 3-5, the impulse body module of FIG. 2 can also be used in each case.

(33) Additionally or alternatively, in particular, the cavities can be designed to be cube-shaped in each case, in particular with rounded or chamfered edges or inner contours, as shown and explained with reference to FIGS. 6, 7.

(34) Additionally or alternatively, in the embodiment of FIG. 6, the sealing cover 14 of FIG. 7 can also be provided.

(35) In particular, the overall view of FIGS. 3-5, 7, and 8a, 8b and 8c illustrates the diversity of variants that can be used or can be made available by joining impulse body modules according to the invention to form impulse body module groups according to the invention, in particular by joining different numbers of impulse body modules according to the invention to form different impulse body module groups according to the invention, while, at the same time, affording a low(er) production cost for equipping different gas turbine blades.

(36) Moreover, it is noted that what is involved in the exemplary embodiments are merely examples, which are not intended to limit the protective scope, the applications, and the structure in any way. Instead, the preceding description affords the person skilled in the art a guideline for implementing at least one exemplary embodiment, whereby diverse changes, in particular in regard to the function and arrangement of the described component parts, can be made without leaving the protective scope as ensues from the claims and the combinations of features equivalent to these claims.