Split inner ring

Abstract

The present invention provides a split inner ring for an adjustable guide blade arrangement, having a ring segment arrangement with at least two ring segments (1, 2) and a bearing bush arrangement with at least one bearing bush (5) for mounting an adjustable guide blade (4) of the guide blade arrangement, in which a ring segment and another ring segment of the ring segment arrangement can be joined together by the bearing bush arrangement.

Claims

1. A split inner ring for an adjustable guide blade arrangement in a turbomachine, comprising: a ring segment arrangement including a first ring segment and a second ring segment adjacent thereto; a bearing bush arrangement with a bearing bush configured and arranged for mounting an adjustable guide blade of the adjustable guide blade arrangement, the adjustable guide blade includes a journal received in the bearing bush of the bearing bush arrangement; the bearing bush having a radial projection in communication with the first ring segment and the second ring segment with a portion of the first ring segment and a portion of the second ring segment located between the radial projection and the journal thereby maintaining the first ring segment and the second ring segment adjacent to each other; the first ring segment and the second ring segment of the ring segment arrangement being joined together by the bearing bush arrangement wherein the at least one bearing bush is positioned between the journal of the adjustable guide blade and the first and second ring segments of the ring segment arrangement.

2. The split inner ring according to claim 1, wherein the first and second ring segments of the ring segment arrangement are axially adjacent and together define a separation joint in the peripheral direction and can be joined by the bearing bush arrangement.

3. The split inner ring according to claim 2, wherein a form-fitting centering of the first and second ring segments of the ring segment arrangement is provided.

4. The split inner ring according to claim 1 wherein the first and second ring segments of the ring segment arrangement are adjacent in the peripheral direction, which together define an axial separation joint and can be joined by the bearing bush arrangement.

5. The split inner ring according to claim 1, wherein the first ring segment and the second ring segment of the ring segment arrangement are connected together in form-fitting manner, frictionally, and/or cohesively by the bearing bush arrangement.

6. The split inner ring according to claim 5, wherein the radial projection of the bearing bush engages in a radial groove in the first ring segment and a radial groove in the second ring segment.

7. The split inner ring according to claim 1, further comprising: a securing element for the radial fixation of the bearing bush arrangement at the ring segment arrangement.

8. The split inner ring according to claim 7, wherein the securing element and the ring segment arrangement are connected together in form-fitting manner, frictionally, and/or cohesively.

9. The split inner ring according to claim 7, wherein the securing element has at least one axial projection that engages behind an undercut in the ring segment arrangement.

10. The split inner ring according to claim 7, wherein the securing element has an inner seal.

11. The split inner ring according to claim 7, wherein the securing element centers the first and second ring segments of the ring segment arrangement in form-fitting manner.

12. The split inner ring according to claim 1, wherein the split inner ring for the adjustable guide blade arrangement is configured and arranged for use in an aircraft engine.

13. The split inner ring according to claim 1, wherein the bearing bush arrangement includes a plurality of bearing bushes configured and arranged for respectively mounting a plurality of adjustable guide blades and maintaining the first ring segment and the second ring segment adjacent to one another, at a plurality of different locations, as a ring segment arrangement.

14. A method for assembling a split inner ring for an adjustable guide blade arrangement in a turbomachine, comprising the steps of: providing a ring segment arrangement with a first ring segment and a second ring segment adjacent thereto; providing a bearing bush arrangement with a bearing bush having a radial projection configured and arranged for mounting an adjustable guide blade of the adjustable guide blade arrangement, the adjustable guide blade including a journal received in the bearing bush of the bearing bush arrangement; and placing the radial projection in communication with a portion of the first ring segment and the second ring segment with a portion of the first ring segment and a portion of the second ring segment located between the radial projection and the journal thereby maintaining the first ring segment and the second ring segment adjacent to one another; joining the first ring segment and the second ring segment together by the bearing bush arrangement for mounting the adjustable guide blade arrangement wherein the at least one bearing bush is positioned between the journal of the adjustable guide blade and the first and second ring segment of the ring segment arrangement.

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

(1) Additional advantageous enhancements of the present invention can be taken from the claims and the following description of preferred embodiments. Shown for this purpose, partially schematized:

(2) FIG. 1 is an axial section of a portion of an inner ring of a turbomachine according to one embodiment of the present invention; and

(3) FIG. 2 is a view from radially inside according to A-A in FIG. 1 without a seal carrier.

DESCRIPTION OF THE INVENTION

(4) FIG. 1 shows an axial section of a portion of an inner ring of a turbomachine according to one embodiment of the present invention having a crosswise-split ring segment arrangement with an axially anterior ring segment (left in FIG. 1) and a posterior ring segment axially adjacent to this (right in FIG. 2), which together define a separation joint 3 (see FIG. 2) in the peripheral direction (vertical in FIG. 2).

(5) Adjustable guide blades 4 of a guide blade arrangement are mounted rotatably by means of journals 4.1 in through-boreholes of bearing bushes 5 of a bearing bush arrangement of the inner ring.

(6) The axially adjacent ring segments 1, 2 are joined together in form-fitting manner by the bearing bushes 5 of the bearing bush arrangement. For this purpose, each of the bearing bushes 5 has a radial projection in the form of a flange 5.1 at a collar 5.2, which engages behind an undercut in the ring segments 1, 2, the undercut being defined by an annular groove 6. The collar 5.2 can be widened elastically in the assembled state in order to fix the bearing bushes 5 frictionally at the ring segments and to brace these.

(7) The undercuts 6 are disposed on a side of the ring segment arrangement facing away from the guide blade arrangement (bottom in FIG. 1), in order to make possible an assembling from radially inside with simultaneous or subsequent mounting of the guide blades 4.

(8) A multi-part securing element in the form of a crosswise-split seal carrier 7 with an inner seal 7.1 is joined in form-fitting manner to the ring segments 1, 2. For this purpose, two axial projections 7.2 of the seal carrier lying opposite one another engage in corresponding peripheral grooves in the ring segments 1, 2, which define undercuts 7.3, and thus also radially fix the bearing bush arrangement at the ring segment arrangement. The seal carrier 7 can be elastically widened radially in the assembled state, in order to pre-stress the bearing bushes 5 radially against the ring segments.

(9) The seal carrier 7 centers the ring segments 1, 2 in form-fitting manner by projections that engage in recesses (not shown).

(10) For the assembling of the split inner ring, the ring segments 1, 2 are joined together by inserting the bearing bushes 5. Now or subsequently, the guide blades 4 are mounted in the bearing bushes 5.

(11) Although exemplary embodiments were explained in the preceding description, it shall be noted that a plurality of modifications is possible. In addition, it shall be noted that the exemplary embodiments are only examples that in no way shall limit the scope of protection, the applications and the construction. Rather, a guide is given to the person skilled in the art by the preceding description for implementing at least one exemplary embodiment, wherein various modifications can be carried out, in particular with respect to the function and arrangement of the described components, without leaving the scope of protection as it results from the claims and combinations of features equivalent to these.