阅读说明：本技术 谐振器、用于制造这种谐振器的方法和设有这种谐振器的燃烧器装置 (Resonator, method for manufacturing such a resonator and burner arrangement provided with such a resonator ) 是由 克劳斯·克鲁施 于 2020-03-16 设计创作，主要内容包括：本发明涉及一种用于安装在固定式燃气轮机设备(1)的燃烧器装置中的具有多个穿孔(13)的环形的谐振器(8),其特征在于,谐振器(8)由耐火陶瓷制成。本发明还涉及一种用于制造这种谐振器(8)的方法以及一种用于燃气轮机设备(1)的燃烧器装置,所述燃烧器装置具有：燃烧器单元(2),所述燃烧器单元具有燃烧器(6)；过渡管路(9),所述过渡管路设置在燃烧器单元(2)的下游并且设计用于将通过燃烧器(6)产生的热气引导至涡轮；以及至少一个根据本发明的谐振器(8)。(The invention relates to an annular resonator (8) with a plurality of perforations (13) for installation in a burner device of a stationary gas turbine plant (1), characterized in that the resonator (8) is made of a refractory ceramic. The invention also relates to a method for producing such a resonator (8) and to a burner arrangement for a gas turbine plant (1), having: a burner unit (2) having a burner (6); a transition duct (9) disposed downstream of the combustor unit (2) and designed for guiding the hot gases generated by the combustor (6) to the turbine; and at least one resonator (8) according to the invention.)

1. An annular resonator (8) with a plurality of perforations (13) for installation in a burner device of a stationary gas turbine plant (1),

it is characterized in that the preparation method is characterized in that,

the resonator (8) is made of a refractory ceramic.

2. The resonator (8) of claim 1,

it is characterized in that the preparation method is characterized in that,

the resonator has an outer ring circumference (11) tapering conically in the axial direction.

3. The resonator (8) of claim 2,

it is characterized in that the preparation method is characterized in that,

a plurality of spring elements (15) acting in the radial direction are arranged on the outer ring circumferential surface (11).

4. The resonator (8) of claim 3,

it is characterized in that the preparation method is characterized in that,

the spring element (15) is a leaf spring which extends in the axial direction and is bent radially outward.

5. Resonator (8) according to claim 3 or 4,

it is characterized in that the preparation method is characterized in that,

the spring elements (15) are spaced apart from one another uniformly in the circumferential direction.

6. Resonator (8) according to any of the preceding claims,

it is characterized in that the preparation method is characterized in that,

the resonator is composed of a plurality of ring segments.

7. A method for manufacturing a resonator according to any of the preceding claims,

it is characterized in that the preparation method is characterized in that,

during the prototype process of the ring-shaped resonator (8), the perforation (13) is preferably formed using an additive-manufactured mold insert.

8. A burner arrangement for a gas turbine plant (1), the burner arrangement having:

a burner unit (2) having a burner (6),

a transition duct (9) arranged downstream of the combustor unit (2) and designed for guiding hot gases generated by the combustor (6) to a turbine, and

at least one resonator (8) according to any of claims 1-6.

9. The burner apparatus of claim 8,

it is characterized in that the preparation method is characterized in that,

at least one of the resonators (8) is accommodated in an annular metallic housing structure (16) by means of radial and axial pretensioning forces, said housing structure having a cross section tapering in the downstream direction,

wherein the spring element (15) is arranged between the resonator (8) and the housing structure (16).

10. The burner apparatus of claim 9,

it is characterized in that the preparation method is characterized in that,

the radial and axial pretensioning force is applied via a pressure element (17), which is in particular of annular design and is fastened detachably on the end face to the housing structure (16),

the pressure element is screwed in particular to the housing structure.

11. Burner apparatus according to claim 9 or 10,

it is characterized in that the preparation method is characterized in that,

the housing structure (16) is formed by the burner unit (2) or by the transition line (9), or is provided as a separate component which is arranged between the burner unit (2) and the transition line (9).

Technical Field

The invention relates to an annular resonator with a plurality of perforations for installation in a burner device of a stationary gas turbine installation. The invention also relates to a method for producing a resonator according to the invention and to a burner arrangement for a gas turbine plant, having: a burner unit having a burner; a transition duct arranged downstream of the combustor unit and designed for guiding the hot gases generated by the combustor to the turbine; and at least one such resonator.

Background

A combustor arrangement is used in a gas turbine plant for generating and directing hot gases to a turbine inlet. For this purpose, the burner arrangement comprises, in addition to the burner unit, a Transition line which is designed as a tube and is also referred to in the technical field as "Transition piece". The transition lines are subjected to high thermal loads during operation of the gas turbine plant. The transition line is accordingly made of a high-temperature-resistant material, usually a thin-walled nickel-based material with cooling channels on the inside, and has an inner layer system (TBC + MCrAlY) for thermal insulation. In order to reduce acoustic combustion vibrations, it is known to provide at least one ring-shaped resonator made of metal behind the flame zone in a so-called "Basket" of the burner unit. The resonators are technically weak points of the burner arrangement, since they regularly have cracks and limit the service life of the "basket". Remanufacturing and replacing resonators is very costly and cost intensive. The object of the present invention is to make maintenance of the burner arrangement simpler and more cost-effective, taking into account the fact that further intensification of the reporting situation is desired due to the increasing demands on the gas turbine.

Disclosure of Invention

In order to achieve the object, the invention provides a resonator of the type mentioned at the beginning, characterized in that the resonator is made of a refractory ceramic. This results in the resonator tending to form significantly fewer cracks at the temperatures prevailing during operation of the burner arrangement, thereby significantly reducing maintenance expenditure and costs.

The resonator advantageously has an outer circumferential surface which tapers in the axial direction, so that the resonator can be inserted into and fastened to an annular metal housing structure having a likewise conically tapered housing surface.

A plurality of spring elements acting in the radial direction are preferably arranged on the outer circumferential surface of the resonator. Such a spring element makes it possible, when the resonator is inserted into the metal housing structure, to achieve a radial and axial tensioning of the resonator while maintaining an annular gap between the resonator and the housing structure, so that differences in thermal expansion can be compensated and the resonator can be fixed in a force-limiting manner under all operating conditions.

According to one embodiment of the invention, the spring element is a radially outwardly bent leaf spring extending in the axial direction. In this way a simple and cost-effective construction is achieved.

Advantageously, the spring elements are spaced uniformly from one another in the circumferential direction, which makes it possible to position the resonator in a centered manner within the housing structure.

The resonator may be formed in one piece or from a plurality of ring segments.

The invention also provides a method for manufacturing a resonator according to the invention, in which method, during the prototype process of a ring-shaped resonator, preferably an additive-manufactured mould insert is used for forming the perforation. The perforations may be geometrically matched to the desired attenuation frequency when the resonator is manufactured. For said purpose, parameters may be varied, such as for example aperture area ratio, i.e. the ratio of all aperture areas to the total area, resonator thickness, aperture radius, etc. The gap size between the resonator and the metal can structure, which is chosen when the resonator is mounted, also has an effect on the attenuation frequency.

Furthermore, the invention proposes a burner arrangement for a gas turbine plant, having: a burner unit having a burner; a transition duct arranged downstream of the combustor unit and designed for guiding the hot gases generated by the combustor to the turbine; and at least one resonator according to the invention.

Preferably, at least one resonator is accommodated in an annular metal housing structure with a cross section tapering in the downstream direction by means of radial and axial pretensioning forces, wherein a spring element is arranged between the resonator and the housing structure.

The radial and axial pretensioning force is advantageously applied via a pressure element, which is in particular of annular design, which is detachably fastened at the end to the housing structure, in particular screwed thereto. The pressure element is thus pressed axially against one or more resonators inserted into the housing structure and tensions the spring element with the desired pretensioning force.

The housing structure may be formed by the burner unit or by the transition duct itself or may be provided as a separate component which is arranged between the burner unit and the transition duct.

Drawings

Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. Shown in the attached drawings:

FIG. 1 shows a sectional view of a region of a known gas turbine plant;

fig. 2 shows a perspective view of a resonator according to a first embodiment of the invention;

fig. 3 shows a perspective exploded view of a partial region of a burner arrangement according to the invention, with a resonator according to a second embodiment of the invention; and

fig. 4 shows a sectional view of the device shown in fig. 2 in the mounted state.

In the following, the same reference numerals refer to the same type of component or component section.

Detailed Description

Fig. 1 shows a region of a known gas turbine system 1 in which a burner unit 2 is inserted into a housing 3 of the gas turbine system 1. The burner unit 2 is connected via a flange 4 to a connecting housing 5, which in turn is screwed to the housing 3. However, the flange 4 can in principle also be fastened directly to the housing 3, and the connecting housing 5 can be omitted accordingly. The burner unit 2 comprises a burner 6 and a tubular combustion chamber 7, also commonly referred to as a "basket", connected downstream to said burner. In the region of the combustion chamber 7, behind the flame region of the burner 6, a metal resonator 8 is provided, which is provided to reduce acoustic combustion vibrations. The outlet end of the combustion chamber 7 is connected to the inlet end of a transition duct 9, also referred to as "transition piece", which is held on the housing 3 via a regulating and fixing device 10 and is designed to guide the hot gas generated by the combustor 6 to a turbine of the gas turbine device 1, which is not shown at present, located downstream. The burner unit 2 and the transition duct 9 together form a burner arrangement. The gas turbine plant 1 comprises a plurality of said burner arrangements, which supply hot gas to the turbine.

The burner arrangement is subjected to high thermal loads during operation of the gas turbine plant 1. The high temperatures lead to crack formation in the resonator 8, so that the combustion chamber 7 must be repaired or replaced regularly. This is unusually time-intensive and cost-intensive.

Fig. 2 shows a ring-shaped resonator 8 according to a first embodiment of the invention, which is made of a refractory ceramic. The resonator 8 has an outer diameter D in the axial direction A_a1To an outer diameter D_a2A conically tapering outer circumferential surface 11 and an inner circumferential surface 12: the inner ring circumference extends parallel to the outer ring circumference 11 and likewise in the axial direction from the inner diameter D_i1To an inner diameter D_i2The taper is thin. A plurality of perforations 13 are formed at the outer circumferential surface 11. The size, number, distribution and shape of the individual perforations 13 can be freely chosen when manufacturing the resonator 8 for achieving a desired attenuation frequency. The through-holes 13 are preferably manufactured during the prototype process of the resonator 8 using an additive-manufactured mold insert, wherein in principle, however, also additional or complementary manufacturing techniques may be used.

In fig. 3 and 4, a resonator 8 according to a second embodiment of the invention is shown, which, like the resonator 8 shown in fig. 2, is made of a refractory ceramic and is provided with perforations 13. The difference is that the resonator 8 shown in fig. 3 is not one piece, but consists of a plurality of ring segments 14. At the outer ring circumferential surface 11, a plurality of spring elements 15 are positioned which act in the radial direction and which are in the present case designed as radially outwardly bent leaf springs which extend in the axial direction and are arranged in a uniformly distributed manner on the outer ring circumferential surface 11. In order to accommodate the spring element 15, a recess can be formed in the outer circumferential surface 11 of the resonator 8, wherein this is not absolutely necessary. The two resonators 8 shown in fig. 3 have a respectively smaller outer diameter D when they are installed_a2In turn, is inserted axially forward into the metallic housing structure 16 so that the spring element 15 engages with the inner wall of the housing structure 16. The resonator 8 is then pushed further into the housing structure 16 via the pressure element 17, which is formed in the form of a ring, against the spring force of the spring element 15, and the pressure element 17 is subsequently fastened to the housing structure 16 at the end face by means of the fastening bolt 18. In this way, the resonators 8 are fixed with radial and axial pretensioning forces applied, while maintaining the annular gap 19 between the resonators 8 of the housing structure 16. The annular gap 19 can be dimensioned within certain limits and likewise has an influence on the damping frequency or frequencies of the resonator 8. The casing structure 16 may essentially form part of the combustion chamber 7 of the burner unit 2 or of the transition duct 9 or, as shown in fig. 3 and 4, be provided as a separate component which is inserted between the burner unit 2 and the transition duct 9 and fastened there.

It should be clear that the resonator 8 shown in fig. 2 can be mounted with the same housing structure 16, spring element 15 and pressure element 17 as the resonator 8 shown in fig. 3 and 4.

While the details of the invention have been illustrated and described in detail in the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.