WHEEL DISK ASSEMBLY HAVING SEALING PLATES

Abstract

A wheel disk assembly having a wheel disk, a plurality of blade devices fastened along an outer circumference of the wheel disk, a plurality of sealing plates accommodated between the wheel disk and the blade devices such that the sealing plates are moveable in the circumferential direction, and securing devices designed such that the securing devices secure the sealing plates against movement in the circumferential direction. Pins are provided as securing devices, which pins are detachably retained in bores arranged on the wheel disk and reach into recesses that are formed on surfaces of the sealing plates facing the wheel disk, wherein at least one of the pins, preferably all of the pins, are designed such that, in order to disengage a pin from the associated recess, the pin in question can be plunged further into the bore in a resilient manner.

Claims

1.-9. (canceled)

10. A wheel disk assembly, comprising: a wheel disk, a plurality of blade devices which are fastened along an outer circumference of the wheel disk, a plurality of sealing plates which are received between the wheel disk and the blade devices such that they are displaceable in the circumferential direction, and securing devices which secure the sealing plates against displacement in the circumferential direction, wherein bolts are provided as securing devices, which bolts are releasably held in bores arranged on the wheel disk and engage in cutouts which are formed in faces of the sealing plates oriented toward the wheel disk, wherein at least one of the bolts, in order to release the engagement from the associated cutout, is resiliently pressable further into the bore, wherein the bolt has, at its end region oriented away from the wheel disk, at least one radially outwardly protruding projection as a bearing surface for an associated sealing plate.

11. The wheel disk assembly as claimed in claim 10, wherein all of the bolts, in order to release the engagement from the associated cutout, are resiliently pressable further into the bore, wherein the bolts have, at their end region oriented away from the wheel disk, at least one radially outwardly protruding projection as a bearing surface for an associated sealing plate.

12. The wheel disk assembly as claimed in claim 10, wherein the bolt, braced against the base of the bore, presses against the faces of the sealing plates oriented toward the wheel disk.

13. The wheel disk assembly as claimed in claim 10, wherein the bore has an essentially hemispherical bore base, and/or is untapped.

14. The wheel disk assembly as claimed in claim 10, wherein the bolt has, at its end region oriented toward the wheel disk, at least one spring leg engaging in the associated bore.

15. The wheel disk assembly as claimed in claim 14, wherein two spring legs are arranged opposite one another.

16. The wheel disk assembly as claimed in claim 10, wherein the at least one projection is annular.

17. The wheel disk assembly as claimed in claim 10, wherein the cutouts formed in the sealing plates are formed as through-holes.

18. The wheel disk assembly as claimed in claim 10, wherein the cutouts formed in the sealing plates are formed as radially extending elongate slots

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Further features and advantages of the present invention will become clear from the following description of a wheel disk according to one embodiment of the present invention, with reference to the appended drawing, in which:

[0017] FIG. 1 is a schematic perspective view of a wheel disk assembly according to one embodiment of the present invention;

[0018] FIG. 2 is a schematic section view of a securing device of the wheel disk assembly shown in FIG. 1;

[0019] FIG. 3 is a schematic perspective view of a sealing plate of the wheel disk assembly shown in FIG. 1;

[0020] FIG. 4 is a detail view of a cutout formed in the sealing plate shown in FIG. 3; and

[0021] FIG. 5 is a schematic perspective view of a bolt of the securing device shown in FIG. 2.

DETAILED DESCRIPTION OF INVENTION

[0022] FIGS. 1 to 5 show a wheel disk assembly 1 according to one embodiment of the present invention, or components thereof. The wheel disk assembly 1 comprises a wheel disk 2, multiple blade devices 3 which are attached along an outer circumference of the wheel disk 2, and multiple sealing plates 4 which extend between the wheel disk 2 and the blade devices 3, and are received such that they can be displaced in the circumferential direction U. More precisely, the sealing plates 4 are inserted into annular grooves which are arranged spaced apart from one another in the radial direction R, the annular grooves being formed on the one hand in the wheel disk 2 and on the other hand in the blade devices 3.

[0023] In order to secure the sealing plates 4 against displacement in the circumferential direction U, the wheel disk assembly 1 comprises multiple securing devices 5, in the present case one securing device 5 for each sealing plate 4. Each securing device 5 has a bolt 6 which is attached to the wheel disk 2 and engages in a cutout 7 formed in the face of a respective sealing plate 4 oriented toward the wheel disk 2. The bolts 6 are held in a releasable, clamping manner in untapped bores 8 of the wheel disk 2, each bore 8 having an essentially hemispherical bore base. The bolts 6 have, at their end region oriented toward the wheel disk 2, two mutually opposite spring legs 9 which, in the properly installed state, bear against the wall of the bore 8 exerting a clamping force, as shown in FIG. 2. The bolts 6 have, at their end region oriented away from the wheel disk 2, a radially outwardly protruding projection 10 which in the present case is annular and serves as a bearing surface for an associated sealing plate 4. At the same time, the projection 10 serves as a spacer and defines a predetermined separation between the wheel disk 2 and the corresponding sealing plate 4. The cutouts 7 formed in the sealing plates 4 are provided as through-holes, more precisely as piercing, radially extending elongate slots, such that the bolts 6 have movement play in the radial direction R, in particular in the radial outward direction.

[0024] The wheel disk assembly 1 according to the invention is characterized in particular in that the spring legs 9 make it possible for the bolts 6 to be installed and removed simply and repeatedly. While, during installation, the bolt 6 is first pushed deep into the bore such that a sealing plate can then be moved past the end region of the bolt, for removal the bolt 6 must also be pushed into the bore 8 in order to release the engagement of the bolt 6 with the cutout 7, and thus allow the sealing plate to be displaced in the circumferential direction. In that context, the spring action of the bolt 6 is oriented such that the bolt moves at least partially out of its bore as soon as it is released.

[0025] Another advantage is that the bore 8 is untapped such that the strength of the wheel disk 2 is not unnecessarily affected by a notch effect. The essentially hemispherical bore base also contributes to strength. The projection 10 ensures a defined position of the sealing plates 4 in the properly mounted state. The design of the cutouts 7 as radially extending and piercing elongate slots, which allow the bolts 6 movement play in the radial direction, makes it possible to compensate for thermal expansion of the sealing plates 4 during design operation of the wheel disk assembly 1.

[0026] Although the invention has been described and illustrated in detail by way of the preferred exemplary embodiment, the invention is not restricted by the disclosed examples and other variations can be derived herefrom by a person skilled in the art without departing from the scope of protection of the invention.