Turbomachine with gap adjustment

Abstract

A turbomachine, in particular, a compressor, having a housing and having at least one housing insert accommodated therein and having a fitting piece for the adjustment of a gap dimension between the housing and the housing insert, wherein the housing comprises, for the adjustment of the gap dimension, a horizontally adjustable guide element into which the fitting piece is inserted, is provided.

Claims

1. A turbomachine having a housing with a radius and at least one housing insert having a radius, said radius of said housing insert received in the radius of the housing and an adjusting piece for adjusting a gap size between the housing and the at least one housing insert, wherein, in order to adjust the gap size, the housing comprises a guide element that is adjusted horizontally within a recess of the housing, and into which the adjusting piece is inserted which is connected fixedly to the at least one housing insert by a screw connection, the guide element having a horizontally running threaded bore which is aligned with a through bore in the housing, a screw or threaded rod which penetrates the through bore being screwed into the threaded bore in order to fix the gap size.

2. The turbomachine as claimed in claim 1, wherein the adjusting piece is inserted with axial play into the guide element.

3. The turbomachine as claimed in claim 1, wherein the guide element has an axial emptying bore.

4. The turbomachine as claimed in claim 1, further comprising nuts secured to the threaded rod for fixing the gap size.

Description

BRIEF DESCRIPTION

(1) Some of the embodiments will be described in detail, with reference to the following figures, wherein like designations denote like members, wherein:

(2) FIG. 1 shows a detail of a conventional turbomachine;

(3) FIG. 2 shows a first exemplary embodiment of a turbomachine according to the invention in a sectioned view; and

(4) FIG. 3 shows a second exemplary embodiment of a turbomachine in a sectioned view.

DETAILED DESCRIPTION

(5) The turbomachine 3 which is configured as a compressor and is shown in details in a sectioned view in FIG. 2 comprises a housing 4, into which a housing insert (return stage) 5 which is shown merely partially is inserted. The housing insert 5 has the function of a stator and serves to deflect a flow in the housing 4 of the turbomachine 3. In order for it to be possible to adjust the housing insert 5 in the horizontal direction which is identified by way of a double arrow 6, a guide element 7 is provided which is arranged in a recess 8 of the housing 4. By way of orientation of the return stage 5, an adjusting piece 13 which is mounted in a return stage 5 fixes the position. During the insertion of the return stage 5, the guide element 7 is oriented in accordance with the position of the return stage 5. Subsequently, the fixing is effected by way of a threaded rod 11 and nuts 16.

(6) As is shown in FIG. 2, the guide element 7 has a threaded bore 9 which runs in the horizontal direction and is aligned with a through bore 10 in the housing 4. The threaded rod 11 penetrates the through bore 10 and is in engagement with the threaded bore 9, with the result that the position of the guide element 7 can be fixed by way of the threaded rod 11. The threaded rod 11 is screwed in until the projecting lengths on both sides are identical; the threaded rod 11 is held by way of the nuts 16, in each case one shim being used, with the result that a play-free connection is produced.

(7) On its side which points into the housing interior, the guide element 7 has a recess 12, into which the adjusting piece 13 is inserted in an axially movable manner. The adjusting piece 13 has a through bore 14; the housing insert 5 is screwed to the adjusting piece 13 by means of a screw 15 which is inserted into the through bore 14. The axial fixing of the housing insert 5 is effected by way of a circumferential feather key.

(8) After the adjustment of the guide element 7, the threaded rod 11 is screwed at its two ends by way of nuts 16. The nuts 16 are covered in each case by way of flanges 17.

(9) It can be seen in FIG. 2 that the guide element 7 is offset to the outside in comparison with the housing 4, away from the housing insert 5; accordingly, a greater gap is formed between the guide element 7 and the housing insert 5 than between the housing 4 and the housing insert 5.

(10) The guide element 7 has an emptying bore 18 which is connected to the recess and is arranged approximately in the center of the guide element 7. The emptying bore 18 opens into a radial groove 19, from where a fluid to be discharged can be drained off to the outside.

(11) The turbomachine 3 which is shown partially in FIG. 2 has the advantage that a radial adjustment or orientation of the housing insert 5 is possible by means of the guide element 7 which is subsequently fixed on the housing 21, with the result that complicated and awkward adaptation of the adjusting piece 13 is dispensed with.

(12) FIG. 3 shows a second exemplary embodiment of a turbomachine 20 which is of similar construction to the turbomachine 3 which is shown in FIG. 2. A detailed description of corresponding components is therefore dispensed with at this point. The same designations are used for corresponding components.

(13) In conformity with the first exemplary embodiment, a guide element 7 is arranged horizontally adjustably in a recess 8 of a housing 21. The adjusting piece 13 which is screwed to the housing insert 5 is arranged in the recess 12 of the guide element 7.

(14) In order to fix the gap between the housing insert 5 and the housing 21 after the adjustment, a screw 22 is provided which is screwed into the threaded bolt 9 of the guide element 7. The screw 22 penetrates a through bore 23 in the housing 21 and opens into a blind bore 24. After the gap size between the return stage 5 and the housing 21 has been set, the screw 22 is screwed in in order to fix the position of the guide element 7; the screw is fixed by way of a threaded washer 25 which bears against the screw head. The head of the screw absorbs forces in the direction of the arrow 6; the threaded washer 25 prevents movements in the other direction, which is shown by way of the opposite arrow 26.

(15) Unlike in the conventional procedure for gap adaptation, in which the adjusting piece is ground in a complicated manner, it is not necessary to remove the housing insert 5 in the turbomachine 20 which is shown in details in FIG. 3. The required mounting time is shortened considerably as a result of the position which can be fixed by means of the screw 22.

(16) Although the invention has been illustrated and described in greater detail by the preferred exemplary embodiment, the invention is not restricted by the disclosed examples, and a person skilled in the art can derive different variations herefrom, without departing from the scope of protection of the invention.