CN111379628A - Seal assemblies and gas turbines for gas turbines - Google Patents

Abstract

The invention discloses a sealing assembly for a gas turbine and a gas turbine. The sealing assembly includes a sealing ring, and the sealing ring includes a first section and a second section which are connected in sequence along the axial direction of the sealing ring. The cross-sectional area of the inner peripheral contour of one segment is larger than the cross-sectional area of the inner peripheral contour of the second segment, and the length of the first segment along the axial direction of the seal ring is smaller than the length of the second segment along the axial direction. The axial length of the seal ring, and at least one of the inner peripheral surface of the first segment and the inner peripheral surface of the second segment is provided with a fingertip sealing member, and the fingertip sealing member is connected to the rotating body. spaced radially of the seal ring. The sealing component for the gas turbine of the present invention is not easy to wear, has a long service life, and improves the sealing effect.

Description

Seal assemblies and gas turbines for gas turbines

technical field

The present invention relates to the technical field of gas turbines, in particular, to a sealing assembly for a gas turbine and a gas turbine.

Background technique

In a gas turbine, the turbine discs are usually sealed between stages to prevent the gas in the main flow channel from invading the interior of the turbine chamber, and to ensure the normal and efficient movement of the gas turbine. In the external suction from a certain stage of the compressor, most of the airflow enters the interior of the stator. Part of the airflow entering the interior of the stator cools the turbine's stator, and the other part flows to the stator seal ring and is divided into axial directions. The two parts of the airflow that flow forward and backward respectively pass through the sealing parts on the sealing ring of the stationary vane, and then seal the gas leaked from the main flow channel.

In the related art, most of the sealing components on the stator vane sealing ring are labyrinth seals, brush seals, or brush seals and labyrinth seals. However, there is a gap between the sealing teeth of the labyrinth seal and the surface of the rotating shaft, and the leakage is large, and under the influence of the radial movement of the rotating shaft surface, the sealing teeth are easily worn, resulting in increased leakage or even seal failure; brush seals are relatively For labyrinth seals, although the leakage is small, the brush wire is in contact with the surface of the rotating shaft, and the brush wire is easily worn during the operation of the rotating shaft, resulting in a larger sealing gap and a larger leakage. not good.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, one aspect of the present invention provides a sealing assembly for a gas turbine, which is not easy to wear, has a long service life, and improves the sealing effect.

Another aspect of the present invention also provides a gas turbine.

A sealing assembly for a gas turbine according to an embodiment of the present invention, the gas turbine includes a static body and a rotating body, the static body surrounds the rotating body, the sealing assembly includes a sealing ring, and the sealing ring is provided on the Between the static body and the rotating body, and the outer peripheral surface of the sealing ring is connected to the static body, the sealing ring includes a first section and a second section that are connected in sequence along the axial direction of the sealing ring, so The cross-sectional area of the inner peripheral contour of the first segment is larger than the cross-sectional area of the inner peripheral contour of the second segment, and the length of the first segment along the axial direction of the seal ring is smaller than that of the second segment The length along the axial direction of the sealing ring, at least one of the inner peripheral surface of the first segment and the inner peripheral surface of the second segment is provided with a fingertip sealing member, the fingertip sealing member and the The rotors are spaced radially of the seal ring.

According to the sealing assembly for a gas turbine according to the embodiment of the present invention, by arranging the fingertip sealing member on the inner surface of the sealing ring, it can be made less wearable, has a long service life, and improves the sealing effect.

In some embodiments, the fingertip sealing member is provided on the inner peripheral surface of the first segment and the inner peripheral surface of the second segment.

In some embodiments, the inner peripheral surface of the first segment is provided with one fingertip sealing member, the inner peripheral surface of the second segment is provided with a plurality of the fingertip sealing members, and the second segment is provided with a plurality of the fingertip sealing members. A plurality of the fingertip sealing members on the inner peripheral surface of the ring are arranged at intervals along the axial direction of the sealing ring.

In some embodiments, a labyrinth sealing member is further provided on the inner peripheral surface of the second segment, and the labyrinth sealing member is spaced apart from the fingertip sealing member along the axial direction of the sealing ring.

In some embodiments, the inner peripheral surface of the first segment and the inner peripheral surface of the second segment are respectively provided with one of the fingertip sealing components, and one of the fingertip sealing components is provided on the inner peripheral surface of the second segment. A fingertip seal member is axially spaced from the labyrinth seal member in the axial direction of the seal ring.

In some embodiments, the fingertip sealing member is provided on the inner peripheral surface of the first segment, and the inner peripheral surface of the second segment is provided with a labyrinth sealing member.

In some embodiments, the fingertip sealing member is provided on the inner peripheral surface of the second segment, and the inner peripheral surface of the first segment is provided with a brush-type sealing member.

In some embodiments, the fingertip sealing members are in a plurality, and the plurality of fingertip sealing members are axially spaced apart from the sealing ring.

In some embodiments, the inner peripheral surface of the second segment is further provided with a labyrinth sealing member, and the labyrinth sealing member and the fingertip sealing member are arranged at intervals along the axial direction of the sealing ring.

A gas turbine according to an embodiment of the second aspect of the present invention includes: a turbine disk that is rotatable; first and second moving blades, the first and second moving blades A vane is provided on the outer edge of the turbine disk; a turbine stationary blade, the turbine stationary blade surrounds the turbine disk and is located between the first moving blade and the second moving blade; a sealing assembly, The sealing assembly is the sealing assembly described in any one of the above embodiments, and the sealing ring is coaxially disposed with the turbine wheel disk and the turbine vane.

Description of drawings

FIG. 1 is a schematic structural diagram of a gas turbine according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a sealing assembly according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a sealing assembly according to another embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a sealing assembly according to still another embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a sealing assembly according to yet another embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a sealing assembly according to still another embodiment of the present invention.

Reference number:

Static body (turbine vane) 1, rotating body (turbine disc) 2, sealing assembly 3, sealing ring 31, first section 311, second section 312, fingertip sealing part 32, labyrinth sealing part 33, brush type The sealing member 34 , the first bucket 4 , and the second bucket 5 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or components. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

The following describes a gas turbine and a sealing assembly therefor according to embodiments of the present invention with reference to FIGS. 1-6 .

As shown in FIG. 1 , a gas turbine according to an embodiment of the present invention includes a static body 1 , a rotating body 2 and a sealing assembly 3 , the static body 1 surrounds the rotating body 2 , and the sealing assembly 3 surrounds the static body 1 and the rotating body 2 , and The sealing assembly 3 is connected to the static body 1 . It can be understood that the external air flow can enter the sealing assembly 3 through the static body 1, and a part of the air flow flows out from the first port of the sealing assembly 3, and the other part of the air flow flows out from the second port of the sealing assembly 3, so as to respectively serve as a seal. effect.

The following describes the sealing assembly 3 for a gas turbine according to an embodiment of the present invention.

As shown in FIGS. 1-6 , the sealing assembly 3 includes a sealing ring 31 , the sealing ring 31 surrounds between the static body 1 and the rotating body 2 , and the outer peripheral surface of the sealing ring 31 is connected with the static body 1 .

The sealing ring 31 includes a first segment 311 and a second segment 312 arranged in sequence along the axial direction of the sealing ring 31 (the left-right direction shown in FIG. 1 ), and the first segment 311 and the second segment 312 are connected. The cross-sectional area of the inner peripheral contour of the first segment 311 is greater than the cross-sectional area of the inner peripheral contour of the second segment 312 . In other words, as shown in FIG. 1 , the first segment 311 and the second segment 312 are sequentially arranged from left to right and connected to each other, the first segment 311 has a central hole penetrating the first segment 311 in the left-right direction, and the second segment 312 has a center hole along the left-right direction. The left-right direction runs through the center hole of the second segment 312 , the cross-sectional area of the center hole of the first segment 311 is larger than that of the second segment 312 , and the first segment 311 and the second segment 312 are coaxially arranged. In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature.

The length of the first section 311 in the axial direction of the seal ring 31 (the left-right direction shown in FIG. 1 ) is smaller than the length of the second section 312 in the axial direction of the seal ring 31 . In other words, as shown in FIG. 1 , the length of the first segment 311 in the left-right direction is shorter than the length of the second segment 312 in the left-right direction.

At least one of the inner peripheral surface of the first segment 311 and the inner peripheral surface of the second segment 312 is provided with a fingertip sealing member 32 , and the fingertip sealing member 32 is spaced apart from the rotor 2 along the radial direction of the sealing ring 31 . It can be understood that the fingertip sealing member 32 is a non-contact fingertip seal.

It can be understood that the external air flow can enter the sealing ring 31 through the static body 1 , and part of the air flow flows out from the first port of the sealing ring 31 through the first section 311 , and the other part of the air flow passes through the second section 312 and flows out of the sealing ring 31 . The second ports flow out to function as seals, respectively.

According to the sealing assembly 3 for a gas turbine according to the embodiment of the present invention, when the sealing airflow passes through the fingertip sealing member 32 on the sealing ring 31 , due to the high pressure and low pressure fingertip sheets of the fingertip sealing member 32 along the sealing ring 31 The axially staggered and stacked arrangement can prevent the axial leakage caused by the circumferential gap of the fingertip pieces. The structure of the bottom of the low-pressure fingertip sheet sealing shoe of the fingertip sealing member 32 can generate fluid pressure between the sealing shoe and the rim of the rotor 2 by the pressure of the fluid or the action of high-speed rotation of the rotor, so that the sealing shoe can be floated and released. A fluid film is formed between the sealing shoe and the rim of the rotating body 2 to reduce wear between the sealing shoe of the fingertip sealing member 32 and the rim of the rotating body 2 . Therefore, the sealing ring 31 with the non-contact fingertip seal has the characteristics of low leakage, low wear and long life. Therefore, by providing the fingertip sealing member 32 on the inner surface of the sealing ring 31, it is not easy to be worn, the service life is long, and the sealing effect is improved.

In addition, the non-contact fingertip seal has less leakage than the labyrinth seal, and its process is simpler and lower in cost than the brush seal. Because it is a non-contact sealing form, it does not contact the rotating body, so under normal operation, there is no friction and wear, and the heat generation is small. Moreover, the surface of the track paired with the fingertips does not need to be sprayed with a wear-resistant coating, and there is no risk of coating peeling.

In some optional embodiments, as shown in FIGS. 2-3 , the fingertip sealing member 32 is provided on the inner peripheral surface of the first segment 311 and the inner peripheral surface of the second segment 312 . In other words, both the inner peripheral surface of the first segment 311 and the inner peripheral surface of the second segment 312 are provided with the fingertip sealing member 32 .

In some specific embodiments, as shown in FIG. 2 , the inner peripheral surface of the first segment 311 is provided with a fingertip sealing member 32 , the inner peripheral surface of the second segment 312 is provided with a plurality of fingertip sealing members 32 , The plurality of fingertip sealing members 32 on the inner peripheral surface of the second segment 312 are arranged at intervals along the axial direction of the sealing ring 31 . It can be understood that the present invention is not limited thereto, for example, the inner peripheral surface of the first segment 311 and the inner peripheral surface of the second segment 312 are each provided with a fingertip sealing member 32 . In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In some specific embodiments, as shown in FIG. 3 , the inner peripheral surface of the second segment 312 is further provided with a labyrinth sealing member 33 , and the labyrinth sealing member 33 is spaced apart from the fingertip sealing member 32 along the axial direction of the sealing ring 31 . .

Further, the inner peripheral surface of the first segment 311 and the inner peripheral surface of the second segment 312 are respectively provided with a fingertip sealing member 32 , and a fingertip sealing member 32 on the inner peripheral surface of the second segment 312 and the labyrinth sealing member 33 are spaced apart in the axial direction of the seal ring 31 . For example, in the embodiment shown in FIG. 3 , the right end of the first segment 311 is connected to the left end of the second segment 312 , the inner peripheral surface of the first segment 311 is provided with a fingertip sealing member 32 , and the inner peripheral surface of the second segment 312 is provided with a fingertip sealing member 32 . The face is provided with a labyrinth seal part 33 and a fingertip seal part 32, wherein the fingertip seal part 32 and the labyrinth seal part 33 are arranged in sequence from left to right and spaced apart from each other.

In other optional embodiments, as shown in FIG. 4 , the fingertip sealing member 32 is provided on the inner peripheral surface of the first segment 311 , and the inner peripheral surface of the second segment 312 is provided with a labyrinth sealing member 33 . In other words, as shown in FIG. 4 , only the inner peripheral surface of the first segment 311 is provided with the fingertip sealing member 32 , and the inner peripheral surface of the second segment 312 is not provided with the fingertip sealing member 32 , but is provided with the labyrinth sealing member 33 .

Specifically, as shown in FIG. 4 , the labyrinth seal member 33 covers the inner peripheral surface of the second segment 312 in the axial direction of the second segment 312 .

In some other optional embodiments, as shown in FIGS. 5-6 , the fingertip sealing member 32 is provided on the inner peripheral surface of the second segment 312 , and the inner peripheral surface of the first segment 311 is provided with a brush-type sealing member 34 . In other words, as shown in FIGS. 5 and 6 , only the inner peripheral surface of the second segment 312 is provided with the fingertip sealing member 32 , and the inner peripheral surface of the first segment 311 is not provided with the fingertip sealing member 32 , but is provided with a brush seal Part 34.

In some specific embodiments, as shown in FIG. 5 , the inner peripheral surface of the second segment 312 is further provided with a labyrinth sealing part 33 , and the labyrinth sealing part 33 and the fingertip sealing part 32 are along the axial direction of the sealing ring 31 ( FIG. 1 , the left and right directions shown in 4) are arranged at intervals. In other words, as shown in FIG. 5 , the second segment 312 is provided with the fingertip sealing part 32 and the labyrinth sealing part 33 , and the fingertip sealing part 32 and the labyrinth sealing part 33 are spaced apart from each other in the left-right direction. The fingertip sealing member 32 and the labyrinth sealing member 33 may be arranged sequentially from left to right on the inner peripheral surface of the second segment 312 , or the fingertip sealing member 32 and the labyrinth sealing member 33 may be arranged on the inner peripheral surface of the second segment 312 . Arranged from right to left.

In some specific embodiments, as shown in FIG. 6 , there are multiple fingertip sealing members 32 , and the plurality of fingertip sealing members 32 are spaced apart along the axial direction of the sealing ring 31 . In other words, the inner peripheral surface of the second segment 312 is provided with a plurality of fingertip sealing members 32, and the plurality of fingertip sealing members 32 are arranged spaced apart from each other in the left-right direction. For example, in the embodiment shown in FIG. 6 , the inner peripheral surface of the second segment 312 is provided with two fingertip sealing members 32 , and the two fingertip sealing members 32 are sequentially arranged from left to right and spaced apart from each other.

It can be understood that the inner peripheral surface of the second segment 312 may also be provided with a labyrinth sealing member 33 and a plurality of fingertip sealing members 32, wherein the labyrinth sealing member 33 may be provided between two adjacent fingertip sealing members 32 and Spaced apart from each fingertip sealing member 32 , and may also be spaced apart from a plurality of fingertip sealing members 32 .

According to the sealing assembly for a gas turbine according to the embodiment of the present invention, a non-contact fingertip sealing and other forms of sealing are used for cooperation. It not only solves the problem of a large gap between the sealing teeth of the labyrinth seal and the surface of the rotating shaft, but also reduces the contact between the bottom end of the seal and the rotating body, and has excellent dynamic sealing performance. This not only effectively controls the amount of seal leakage, but also solves the problems of friction and wear and heat generation during operation, improves the reliability of the interstage seal of the rotating body, and prolongs its service life. At the same time, compared with the brush type seal, the number of flexible units of the non-contact fingertip seal is greatly reduced, and the manufacturing process is relatively simple, which can greatly reduce the manufacturing cost.

Next, a gas turbine according to another embodiment of the present invention will be described with reference to FIG. 1 .

As shown in FIG. 1 , a gas turbine according to an embodiment of the present invention includes a turbine vane 1 , a turbine disc 2 , a first moving vane 4 and a second moving vane 5 of a sealing assembly 3 , wherein the turbine disc 2 is rotatable, The first moving blade 4 and the second moving blade 5 are arranged on the outer edge of the turbine disk 2 (the rim of the turbine disk 2), that is, the first moving blade 4 and the second moving blade 4 are connected to the turbine disk. 2 are connected to the outer perimeter. The turbine vane 1 surrounds the turbine disk 2 and is located between the first bucket 4 and the second bucket 5 .

The sealing assembly 3 is arranged between the turbine wheel disc 2 and the turbine vane 1 , and is connected with the turbine vane 1 . Specifically, the sealing ring 31 is disposed coaxially with the turbine disc 2 and the turbine vane 1 , and there are gaps between the turbine vane 1 and the first vane 4 and between the turbine vane 1 and the second vane 5 . As shown in FIG. 1 , after the external airflow passes through the turbine still vane 1 and enters the seal ring 31 , a part of the airflow flows out from the left port of the seal ring 31 through the first section 311 and flows to the space between the turbine still vane 1 and the first moving vane 4 . The other part of the airflow flows out from the right port of the sealing ring 31 through the second segment 312 and flows to the gap between the turbine stationary vane 1 and the second moving vane 5 to seal the gap.

The sealing assembly 3 includes a sealing ring 31 and a fingertip sealing part 32 , wherein the sealing ring 31 surrounds the turbine wheel disc 2 and the turbine vane 1 , and the outer peripheral surface of the seal ring 31 is connected with the turbine vane 1 . The sealing ring 31 includes a first segment 311 and a second segment 312 which are sequentially arranged from left to right and are connected to each other. The central hole of the second segment 312, the cross-sectional area of the central hole of the first segment 311 is larger than the cross-sectional area of the central hole of the second segment 312, and the first segment 311 and the second segment 312 are coaxially arranged. The length of the first segment 311 in the left-right direction is shorter than the length of the second segment 312 in the left-right direction.

In the embodiment shown in FIG. 2 , there are three fingertip sealing members 32 , one fingertip sealing member 32 is provided on the inner peripheral surface of the first segment 311 , and two fingertip sealing members 32 are provided on the second segment 312 and the two fingertip sealing members 32 of the inner peripheral surface of the second segment 312 are spaced apart in the left-right direction.

In the embodiment shown in FIG. 3 , the inner peripheral surface of the first segment 311 is provided with a fingertip sealing member 32 , and the inner peripheral surface of the second segment 312 is provided with a fingertip sealing member 32 and a labyrinth sealing member 33 , And the fingertip seal member 32 and the labyrinth seal member 33 are spaced apart from each other in the left-right direction.

In the embodiment shown in FIG. 4 , the inner peripheral surface of the first segment 311 is provided with a fingertip sealing member 32 , and the inner peripheral surface of the second segment 312 is provided with a labyrinth sealing member 33 , and the labyrinth sealing member 33 is provided on the left and right The inner peripheral surface of the second segment 312 is covered in the direction.

In the embodiment shown in FIG. 5 , the inner peripheral surface of the first section 311 is provided with a brush type sealing member 34 , and the inner peripheral surface of the second section 312 is provided with a fingertip sealing member 32 and a labyrinth sealing member 33 , And the fingertip sealing part 32 and the labyrinth sealing part 33 are arranged in order from left to right and spaced apart from each other.

In the embodiment shown in FIG. 6 , the inner peripheral surface of the first segment 311 is provided with a brush-type sealing member 34 , and the inner peripheral surface of the second segment 312 is provided with two fingertip sealing members 32 spaced apart in the left-right direction. .

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

1. A sealing assembly for a gas turbine, the gas turbine comprising a static body and a rotating body, the static body surrounding the rotating body, characterized in that the sealing assembly comprises a sealing ring, and the sealing ring is provided at a between the static body and the rotating body, and the outer peripheral surface of the sealing ring is connected with the static body, the sealing ring includes a first section and a second section that are connected in sequence along the axial direction of the sealing ring, The cross-sectional area of the inner peripheral contour of the first segment is larger than the cross-sectional area of the inner peripheral contour of the second segment, and the length of the first segment along the axial direction of the seal ring is smaller than that of the second segment The length of the segment along the axial direction of the seal ring, at least one of the inner peripheral surface of the first segment and the inner peripheral surface of the second segment is provided with a fingertip sealing member, the fingertip sealing member spaced from the rotor in the radial direction of the seal ring. 2 . The sealing assembly for a gas turbine according to claim 1 , wherein the fingertip sealing member is provided on the inner peripheral surface of the first segment and the inner peripheral surface of the second segment. 3 . 3. The sealing assembly for a gas turbine according to claim 2, wherein the inner peripheral surface of the first section is provided with one of the fingertip sealing components, and the inner peripheral surface of the second section is provided with A plurality of the fingertip sealing members, and the plurality of the fingertip sealing members on the inner peripheral surface of the second segment are arranged at intervals along the axial direction of the sealing ring. 4 . The sealing assembly for a gas turbine according to claim 2 , wherein a labyrinth sealing member is further provided on the inner peripheral surface of the second segment, and the labyrinth sealing member and the fingertip sealing member are located along the edge of the fingertip sealing member. 5 . The sealing rings are axially spaced apart. 5 . The sealing assembly for a gas turbine according to claim 4 , wherein the inner peripheral surface of the first section and the inner peripheral surface of the second section are respectively provided with one of the fingertip sealing parts, 5 . One of the fingertip seal members on the inner peripheral surface of the second segment is spaced from the labyrinth seal member in the axial direction of the seal ring. 6 . The sealing assembly for a gas turbine according to claim 1 , wherein the fingertip sealing member is provided on the inner peripheral surface of the first segment, and the inner peripheral surface of the second segment is provided with a labyrinth. 7 . sealing parts. 7 . The sealing assembly for a gas turbine according to claim 1 , wherein the fingertip sealing member is provided on the inner peripheral surface of the second segment, and the inner peripheral surface of the first segment is provided with a brush. 8 . type sealing components. 8. The seal assembly for a gas turbine according to claim 7, wherein the fingertip sealing member has a plurality, and the plurality of fingertip sealing members are spaced apart in the axial direction of the sealing ring. 9 . The sealing assembly for a gas turbine according to claim 7 , wherein the inner peripheral surface of the second segment is further provided with a labyrinth sealing member, and the labyrinth sealing member and the fingertip sealing member are arranged along the The axial spaced arrangement of the sealing rings. 10. A gas turbine, comprising: a turbine wheel, the turbine wheel is rotatable; a first moving blade and a second moving blade, the first moving blade and the second moving blade are arranged on the outer edge of the turbine disk; a turbine stationary vane that surrounds the turbine disk and is located between the first bucket and the second bucket; A sealing assembly, wherein the sealing assembly is the sealing assembly according to any one of claims 1-9, and the sealing ring is coaxially disposed with the turbine wheel disk and the turbine vane.

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