KR20160125302A - Turbomachine - Google Patents

Abstract

The present invention relates to a turbo-machine comprising a stator housing (11) and a rotor impeller (12), formed with an axial direction gap (19) between an outer section in a radial direction of the impeller (12) and an adjacent section of the housing (11). The turbo-machine comprises a stator first ring structure (20) and a stator second ring structure (21) having planes (24, 25) facing each other, formed with projections (22, 23) extended in an axial direction and arranged apart from one another in a circumferential direction on the plane. In this case, the ring structures (20, 21) are coupled to each other on at least two predefined relative positions, on which the ring structures (20, 21) respectively have different axial dimensions while connected to each other. The relative positions of the connected ring structures (20, 21) adjust the axial gap dimension between the housing (11) and the outer section in the radial direction of the impeller (12) by the axial dimension of the connected ring structures (20, 21).

Description

Turbo machinery {TURBOMACHINE}

The present invention relates to a turbo machine according to the preamble of claim 1.

DE 10 2009 021 968 A1 discloses a turbocharger having a compressor and a turbine. The compressor of the turbocharger disclosed in this document is implemented as a radial compressor, and the compressor is supplied with supercharged air to be axially compressed, and compressed air is radiated from the compressor in a radial direction. The radial compressor has a stator-side housing and a rotor-side operating wheel, wherein the housing on the stator side of the radial compressor is comprised of a plurality of coupled housing sections. The first housing section is formed by a helical housing section and the second housing section is formed by a so-called insert, in which case the helical housing and the insert are joined together by screws in adjacent flange sections. An axial gap is formed between the radial outer section of the operating wheel and the insert of the housing and the gap must be precisely adjusted so as not to have as little clearance as possible to ensure the best possible efficiency of the radial compressor. In practice, these axial gaps in the turbomachinery are generally controlled using separate components. This separate part may be a compensation ring, which is mounted in the stator side housing for adjustment of the axial gap. Such a compensation ring must be manufactured very accurately. Only when the turbomachine is assembled, by measuring the axial gap, it can be determined whether the compensation ring was manufactured with sufficient accuracy and whether the axial gap could be adjusted sufficiently precisely. In some cases, mechanical machining of the compensation ring is necessary to precisely adjust the axial gap. This increases assembly costs for the turbo machine as a whole.

There is a need for a turbo machine capable of simply and reliably adjusting the axial gap between the housing and the radial outer section of the operating wheel with fewer processes.

An object of the present invention is to provide a novel turbo machine.

The above problem is solved by a turbo machine according to claim 1.

The turbo machine according to the present invention comprises a first ring structure on the stator side and a second ring structure on the stator side which have mutually facing faces in the axial direction and which are axially spaced apart from each other in the circumferential direction, Wherein the ring structures are coupled to each other in at least two defined relative positions, wherein the ring structures in each of the ring structures have a different axial dimension in the combined state of each of the ring structures, The relative position adjusts the dimension of the axial gap between the housing and the radially outer section of the operating wheel by the axial dimension of the ring structures joined together.

The axial gap can be adjusted simply and reliably by the stator side ring structures. The circumferential relative positions between the ring structures determine the axial dimension of the stator side structure consisting of the stator side ring structures and in this case by adjusting the relative circumferential position and hence the axial dimension By adjustment, the axial gap between the housing and the radially outer section of the operating wheel can be precisely adjusted.

Preferably, the housing of the turbomachine comprises a plurality of housing sections coupled to one another, wherein an axial gap is formed between the one radially outer section of the housing section and the working wheel, In particular an integral part of the helical housing section, and the second ring structure is an integral part of the second housing section of the turbomachine coupled to the first housing section, particularly of the insert coupled to the helical housing section. When the ring structures are integral parts of the housing sections of the turbomachine, the separate parts can be omitted, which is particularly advantageous for the adjustment of the axial gap between the housing and the radially outer section of the operating wheel, desirable.

According to a preferred refinement, the first ring structure has stepped protrusions spaced from one another circumferentially in a plane towards the second ring structure, in which case the second ring structure has a circumferential Shaped protrusions spaced apart from one another in the direction of the first ring structure, wherein, when the protrusions of the first ring structure contact the protrusions of the second ring structure at the defined first relative position, the ring structures reduce the axial gap The protrusions of the first ring structure are coupled to the recesses formed between the protrusions of the second ring structure and the protrusions of the second ring structure are formed in the recesses formed between the protrusions of the first ring structure And has a larger axial dimension when combined. According to this preferred embodiment stepwise variation of the axial dimension of the stator side structure composed of ring structures and stepwise adjustment of the axial gap between the housing and the radially outer section of the operating wheel are possible.

According to a preferred refinement, the first ring structure has ramp-shaped protrusions spaced circumferentially from one another in a plane towards the second ring structure, in which case the second ring structure has a circumferential Shaped protrusions spaced apart from each other in the direction of the first ring structure and the protrusions of the first ring structure are in contact with the protrusions of the second ring structure, The directional gap can be steplessly adjusted between the minimum and maximum dimensions. This improvement of the present invention enables continuous stepless variation of the axial dimension of the stator side structure composed of ring structures and stepless adjustment of the axial gap.

Preferably, the first ring structure and the second ring structure are coupled to each other by a screw extending through the bores of the ring structures. This is desirable for ensuring simple assembly.

Preferred embodiments of the invention are set forth in the dependent claims and the following description. Embodiments of the present invention are not limited thereto, but are illustrated with reference to the drawings.

1 is a cross-sectional view of a turbomachine formed as a radial compressor.
2 is an exploded perspective view showing the details of the turbo machine according to the present invention.
3 is a cross-sectional view excerpted from the detail of FIG. 2 in a possible assembled state;

The present invention relates to a radial compressor for a turbo machine, in particular a turbocharger. However, the present invention is not limited to this use. Rather, the invention can be used in other radial compressors and radial turbines.

1 shows a partial cross-section of a turbocharger in the region of a turbomachine formed as a radial compressor 10; 1, the turbomachine 10 formed as a radial compressor includes a housing 11 on the stator side and a rotor-side operating wheel 12. The housing 11 on the stator side includes a plurality of housing sections coupled to each other and includes an insertion section 14 coupled to the helical housing section 13 and the helical housing section 13 in the embodiment shown. The helical housing section 13 and the insertion section 14 are connected to each other by a plurality of engaging screws 17 spaced from one another in the adjacent flange sections 15,16, i.e. in the circumferential direction, As a rotary screw.

A so-called bearing housing 18 is coupled to the housing 11 of the radial compressor in the illustrated embodiment, in which the turbomachine is embodied as a radial compressor 10 of a turbocharger.

1, an axial gap 19 is formed between the housing 11, i.e., the insertion portion 14 of the housing 11, and the radially outer section of the operating wheel 12. As shown in Fig. The axial gap 19 must be precisely adjusted to ensure high efficiency of the turbomachine, particularly the radial compressor 10 shown in FIG. The present invention relates to the details of such a turbomachine, which enables a simple and reliable adjustment of the axial gap 19, in order to ensure a high efficiency of the turbo machine, which is preferably formed as a turbocharger.

The axial gap 19 according to the invention is simply and reliably adjustable by the stator-side ring structure. 2 shows the first ring structure 20 on the stator side and the second ring structure 21 on the stator side, which are spaced apart from each other in the circumferential direction on the ring structures, and axially extending protrusions 22 or 23 is formed. The projections 22, 23 are formed on the axially facing surfaces 24 or 25 of the ring structures 20, 21. Ring structures 20, 21 are coupled at one relative position of at least two prescribed circumferential relative positions, and ring structures 20, 21 at said relative positions are connected in a combined state of said ring structures Wherein the circumferential relative positions in which the ring structures 20, 21 are coupled to each other determine the axial dimensions of the ring structures 20, 21 coupled to one another, The dimension of the axial gap 19 between the housing 11 and the radially outer section of the operating wheel 12 is adjusted by the axial dimension of the teeth 20,

Preferably, one of the stator-side ring structures, for example the ring structure 21, comprises a portion of the first housing section, particularly of the helical housing section in the region of the flange section 15 of the first housing section While the ring structure 20, for example, is an integral part of the helical housing section 13 in the region of the flange section 16 of the first housing section. The axial relative position of the insertion portion 14 with respect to the operating wheel 12 and the relative axial position of the insertion portion 14 with respect to the axial gap 19 are adjusted.

The helical housing 13 and the insert 14 in the region of the flange sections 15 and 16 are connected to each other by means of a screw 17 in which case the screw 17 is connected to the ring structures 20 , 21) through the bores (26, 27).

Figures 2 and 3 show a stator-side first ring structure 20 having stepped protrusions 22 spaced circumferentially from one another in the axial direction 24 towards the stator-side second ring structure 21, The stator-side second ring structures 21 are arranged on the axial surface 25 facing the stator-side first ring structure 20 in such a manner that they are spaced apart from each other in the circumferential direction Shaped protrusion 23, and the protrusions also illustrate embodiments of the present invention having the same height or step height, respectively. In the case where the projections 22, 23 of the two stator ring structures 20, 21 contact each other at the first circumferential relative position, the assembly consisting of the ring structures 20, The protrusions 23 of the stator side ring structure 21 at the second circumferential relative position as shown engage the recesses 28 formed between the protrusions 22 of the stator side ring structure 20, Side ring structure 20 has a greater axial dimension than when engaging the recesses 29 formed between the projections 23 of the stator-side ring structure 21. [

In the embodiment shown in Figures 2 and 3, in which the stepped protrusion 22 of the ring structure 20 and the stepped protrusion 23 of the ring structure 21 each have the same axial height, (20, 21) may be coupled to each other to provide two different axial positions at the two defined circumferential relative positions relative to each other.

2, ring structures 20 and 21 are provided in the region of ring structure 20, which is twice as many bores 26 as bores 27 formed in ring structure 21. [ It is possible to combine the ring structures by means of the screw 17, which meets the mechanical requirements at the two possible relative positions, The bores 27 are in this case implemented, for example, as threaded bores, and the bores 26 are implemented as threadless bores.

2 and 3, stepped protrusions having at least one different height or step height axially in the at least one ring structure 20 or 21 are formed circumferentially side by side so that the ring structures < RTI ID = 0.0 > (20, 21) are coupled to each other so as to provide two possible different axial dimensions at the two or more circumferential relative positions defined for each other. For this purpose, it is sufficient if protrusions having a plurality of different axial step heights are formed in one ring structure, in which case the step protrusions in the other ring structure can all have the same height. The number of bores required in one ring structure with a number of different axial step heights in this case is determined by the number of circumferential relative positions that provide possible different axial dimensions between the ring structures, Corresponds to the product of the number of bores. Thus, for example, if N bores are formed in one ring structure, then the other ring structure must have x * N bores, where x is the number of bores that provide different axial dimensions between ring structures 20, The number of possible relative positions.

Another variation of the embodiment of Figures 2 and 3 is that the first ring structure has a ramp-shaped protrusion or wedge-shaped protrusion spaced circumferentially from one another in the axial direction towards the second ring structure, and the second ring structure Shaped protrusions or wedge-shaped protrusions which are spaced apart from each other in the circumferential direction on the axial surface toward the first ring structure. When such ramp-shaped protrusions or wedge-shaped protrusions of the first ring structure are in contact with the ramp-shaped protrusions or wedge-shaped protrusions of the second ring structure, the housing 11, by a defined circumferential relative position between the ring structures, The axial dimension between the working wheel 12 and the axial gaps 19 can be adjusted continuously between the minimum dimension and the maximum dimension.

In this case it is also possible to provide the same number of bores in the two ring structures, i.e. to provide threaded bores spaced apart in the circumferential direction to accommodate the screws 17 in one ring structure, It is possible to provide a bore extending in a circumferential direction without threads formed as a long hole.

In the preferred embodiment of the radial compressor 10 shown in Fig. 1, the ring structure 21 is preferably an integral part of the flange section 16 of the insert 14. The ring structure 20 is preferably an integral part of the flange section 15 of the helical housing 13 in this case. The axial position of the insert 14 with respect to the actuating wheel 12 is determined by the fact that the insertion structure 14 and the ring structure of the insert rotate circumferentially about the helical housing 13 and against the ring structure of the housing So that the axial gap 19 between the housing 11 and the operating wheel 12 can be adjusted. This relative position is ensured by the screw 17 which is used to couple the two housing sections 13 and 14, in which case the bores in one ring structure are realized without a thread, and in the other ring structure, .

Once the appropriate relative circumferential position relative to the ring structures 20, 21 in the assembly of the turbomachine for adjustment of the axial gap 19 is found, it is preferred that in the ring structure of one of the ring structures, By closing at least one bore that is not needed at a suitable circumferential relative position for a given adjustment of the axial gap during engagement, for example, upon disassembly of the ring structures caused during service, Position.

10: Turbo machine 11: Housing
12: Operation wheel 13: Spiral housing section
14: insertion part 15: flange section
16: flange section 17: engaging screw
18: Bearing housing 19: Axial gap
20: ring structure 21: ring structure
22: protrusion 23: protrusion
24: cotton 25: cotton
26: Bohr 27: Bohr
28: concave portion 29: concave portion

Claims (10)

A turbomachine comprising a housing (11) on the stator side and a rotor side operating wheel (12), the turbomachine including an axial gap between the radially outer section of the operating wheel (12) and an adjacent section of the housing (11) 19. A turbomachine comprising:
(22) having a stator-side first ring structure (20) and a stator-side second ring structure (21) having faces (24, 25) facing each other, and axially extending projections Wherein the ring structures (20, 21) are joined to each other in at least two defined relative positions, and wherein in the relative positions the ring structures (20, 21) The relative positions at which the ring structures 20 and 21 are coupled to each other are determined by the axial dimensions of the ring structures 20 and 21 coupled to each other, (11) and the radial outer section of the operating wheel (12). 2. A device according to claim 1, characterized in that the housing (11) comprises a plurality of housing sections (13,14) coupled to each other, and axially between the housing section (14) Wherein a gap (19) is formed. 3. A connector according to claim 2, characterized in that the ring structure of one of the ring structures (20, 21) is an integral part of the first housing section, in particular of the helical housing section (13) Is an integral part of a second housing section coupled to the first housing section, in particular an insertion section (14) coupled to the helical housing section (13). 4. A method according to any one of claims 1 to 3, wherein the first ring structure (20) and the second ring structure (21) are coupled together by means of a screw (17) 20, 21) through the bores (26, 27). 5. A method according to any one of the preceding claims, characterized in that the first ring structure (20) is a stepped type, spaced apart from one another in the circumferential direction on the face (24) (22), said second ring structure (21) having stepped protrusions (23) spaced from one another circumferentially on a face (25) towards said first ring structure (20) In the case where the protrusions 22 of the first ring structure 20 contact the protrusions 23 of the second ring structure 21 in the first relative position, The protrusions 22 of the first ring structure 20 engage the recesses 29 formed between the protrusions 23 of the second ring structure 21 and the second ring structure 21 of the second ring structure 21, Has a greater axial dimension than when the protrusions (23) of the first ring structure (28) engage the recesses (28) formed between the protrusions (22) of the first ring structure (28) View system. 6. A method according to claim 5, characterized in that all the stepped projections (22) of the first ring structure (20) have the same axial height and that all the stepped projections (23) of the second ring structure Each having the same axial height, such that the ring structures (20, 21) are engageable with one another to provide two different axial dimensions at the defined two relative positions with respect to each other. 6. A method according to claim 5, characterized in that the stepped protrusions (22, 23) of the at least one ring structure (20, 21) have at least two different axial heights so that the ring structures (20, And are engageable with each other to provide at least two different axial dimensions in the defined two or more relative positions. 8. A method according to any one of claims 5 to 7, wherein the number of the bores (26) of the first ring structure (20) provides a different axial dimension between the ring structures (20, 21) Of the second ring structure (21) and the number of bores (27) of the second ring structure (21). 5. The method according to any one of claims 1 to 4, wherein the first ring structure has a ramp-shaped protrusion spaced circumferentially from one another in a plane toward the second ring structure, Shaped protrusions spaced apart from each other in a circumferential direction on a surface facing the first ring structure, wherein, when the protrusions of the first ring structure contact the protrusions of the second ring structure, The axial dimension and the axial gap being adjustable continuously between a minimum dimension and a maximum dimension. 10. The turbo machine according to claim 9, characterized in that the bores of one of the ring structures are formed as threaded bores and the bores of the other ring structure are formed as curved slots extending in the circumferential direction. .

Images