GUIDE VANE ASSEMBLY FOR A TURBOMACHINE

Abstract

The present invention relates to a guide vane assembly for a turbomachine, having an adjustable vane, which can be adjusted in order to alter an angle of attack, and an adjusting element, by way of which the adjustable vane can be adjusted, wherein the adjustable vane and the adjusting element are connected to each other in a connecting region, and wherein the adjustable vane and the adjusting element adjoin each other in the connecting region at a break edge.

Claims

1. A guide vane assembly for a turbomachine, comprising: an adjustable vane, which can be adjusted in order to alter an angle of attack, and an adjusting element, by way of which the adjustable vane can be adjusted; wherein the adjustable vane and the adjusting element are connected to each other in a connecting region; and wherein the adjustable vane and the adjusting element adjoin each other in the connecting region at a break edge.

2. The guide vane assembly according to claim 1, wherein a sleeve is put in place in the connecting region and extends beyond the break edge and connects together the adjustable vane and the adjusting element.

3. The guide vane assembly according to claim 2, wherein the sleeve engages at a pin of the adjustable vane in a form-fitting manner and tensions it against the latter.

4. The guide vane assembly according to claim 3, wherein the sleeve is placed under tension with a screw bolt, which engages in the sleeve and supports it on the adjusting element.

5. The guide vane assembly according to claim 2, wherein the sleeve is slit, at least in sections.

6. The guide vane assembly according to claim 1, wherein the break edge lies at a notch.

7. The guide vane assembly according to claim 1, wherein a marking that is interrupted by the break edge extends over the break edge.

8. The guide vane assembly according to claim 1, wherein the adjusting element is an adjusting lever, which is assembled together with a pin of the adjustable vane.

9. A module for a turbomachine, having a guide vane assembly according to claim 1 and a housing element, with which the guide vane assembly is assembled.

10. A method for producing the guide vane assembly according to claim 1, wherein: i) the adjustable vane and the adjusting element are produced in one piece with each other; ii) the adjustable vane and the adjusting element are separated from each other afterwards by breaking; iii) the adjustable vane and the adjusting element are subsequently assembled so that they adjoin each other at the break edge resulting from the breaking; iv) the adjustable vane and the adjusting element are connected to each other in the connecting region.

11. The method for production of the guide vane assembly according to claim 10, wherein the adjustable vane and the adjusting element are produced in step i) by forging.

12. The method according to claim 10, wherein the adjustable vane and the adjusting element are end-processed prior to step ii).

13. The method according to claim 10, wherein the adjustable vane and the adjusting element are cooled for step ii).

14. The method according to claim 10, wherein the adjustable vane and the adjusting element are furnished with the same identifications and are assigned to each other in step iii) on the basis of these identifications.

15. A method for producing a module of a turbomachine, comprising: a housing element; and a guide vane assembly, which is produced according to the method of claim 10; wherein the adjustable vane and the adjusting element are assembled with the housing element after step ii) and prior to step iv).

Description

BRIEF DESCRIPTION OF THE DRAWING FIGURES

[0027] The invention is explained below in detail on the basis of an exemplary embodiment, whereby, in the scope of the dependent claims, the individual features also can be essential to the invention in other combination and also, furthermore, no distinction is made in detail between the different claim categories.

[0028] Taken individually:

[0029] FIG. 1 shows a turbomachine in a schematic longitudinal sectional view;

[0030] FIG. 2 shows a guide vane assembly for such a turbomachine, with an adjustable vane and an adjusting element; and

[0031] FIG. 3 shows a detailed sectional view of the guide vane assembly in accordance with FIG. 2.

DESCRIPTION OF THE INVENTION

[0032] FIG. 1 shows a turbomachine 1, specifically a turbofan engine, in a longitudinal sectional view. Functionally, the turbomachine 1 is divided into a compressor 1a, a combustion chamber 1b, and a turbine 1c. Both the compressor 1a and the turbine 1c are each constructed from a plurality of stages. Each of the stages is composed of a guide vane ring 5 and a rotating blade ring 6. The reference number 7 refers to the gas duct, that is, the compressor gas duct in the case of the compressor 1a or the hot gas duct in the case of the turbine 1c. In the compressor gas duct, the air intake is compressed and then undergoes combustion with admixed kerosene in the combustion chamber 1b. The resulting hot gas flows through the hot gas duct and thereby drives the rotating blade rings 6 of the turbine 1c.

[0033] In the present example, a plurality of guide vane rings 5 of the compressor 1a are equipped with adjustable vanes 10, which can be adjusted for adaptation of the angle of attack (shown here for the low-pressure compressor, but likewise or alternatively also for the high-pressure compressor).

[0034] FIG. 2 shows a guide vane assembly 20 with such an adjustable vane 10 and an adjusting element 21. The latter involves an adjusting lever 22, by use of which the adjustable vane 10 can be rotated or displaced around an adjustment axis 25. The adjusting element 21 is connected to the adjustable vane 10 in a connecting region 30. The connecting region 30 is formed on a pin 31 of the adjustable vane 10, said pin being arranged radially outside of the vane element 11 in relation to the longitudinal axis 2 of the turbomachine.

[0035] In this case, specifically the pin 31 of the adjustable vane 10 and the adjusting element 21 adjoin each other at a break edge 35. For this purpose, the two of them are initially produced in one piece with each other and they are then separated from each other by deliberate breaking. Once separated from each other, the two parts can then be handled better and, for example, can be assembled with a housing element 40, which is shown here only schematically; on the other hand, the break edge 35 specifies here a defined relative position.

[0036] As presented in the introduction of the description in detail, this can be of advantage, for example, in regard to the precision and also the weight of the entire structure. In the present example, the connection between the adjustable vane 10 and the adjusting element 21 is realized with the use of a sleeve 36, which extends beyond the break edge 35 and pulls the adjusting element 21 against the pin 31. To this end, the sleeve 36 is tensioned against the pin 31 by use of a screw bolt 37, which is supported against the adjusting element 21.

[0037] FIG. 3 shows this arrangement in a detailed sectional view in which the axis of the sectional view is perpendicular to the plane of the drawing in accordance with FIG. 2. The sectional view shows that the sleeve 36 extends beyond the break edge 35; this cannot be seen in FIG. 2 in a straightforward manner on account of a lateral slit of the sleeve 36, which makes possible its lateral placement. At the end 36.1 facing the vane element 11, the sleeve has an inwardly projecting collar 45, which engages in a recess 46 of the pin 31 in a form-fitting manner. The sleeve 36 is thereby held at the pin 31 in a form-fitting manner. The screw bolt 37 engages in an inner thread 47 at the end 36.2 of the sleeve 36 facing away from the vane element 11 and rests against the adjusting element 21 and thus applies tension against the sleeve 36. Accordingly, the two parts are pressed towards each other at the break edge 35; that is, the break surfaces 10.1, 21.1 of the adjustable vane 10 and of the adjusting element 21 are pressed against each other.

[0038] In this detailed illustration, furthermore, a notch 50 can be seen, which specifies a defined position of the break edge 35 during the breaking.