CN114320487B - Caster tooth sealing structure and method suitable for same - Google Patents
Caster tooth sealing structure and method suitable for same Download PDFInfo
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- CN114320487B CN114320487B CN202210017566.XA CN202210017566A CN114320487B CN 114320487 B CN114320487 B CN 114320487B CN 202210017566 A CN202210017566 A CN 202210017566A CN 114320487 B CN114320487 B CN 114320487B
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- 238000007789 sealing Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000004323 axial length Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses a grate tooth sealing structure and a method suitable for the same, wherein the grate tooth sealing structure comprises the following steps: comb teeth; an arc-shaped blade; the bottom of the blade is fixedly connected with the bottom of the grate teeth; the side of the grate teeth, which is close to the blade, is an inclined plane; honeycomb structure over the top of the grate and blades. The method for using the grate tooth sealing structure comprises the following steps: step one, the grate teeth and ninety evenly-spaced blades are fixedly arranged on the grate tooth disc, and the arc direction of the blades is the same as the rotation direction of the grate tooth disc, so that the interval L2 between the honeycomb structure and the grate tooth top is 0.3mm; and secondly, forming a 1485kPa high-pressure area on the left side of the grate, wherein the grate disc drives the grate and the blades to rotate at 15500 rpm. The low-pressure area on the right side of the inclined plane of the grate disc is provided with the arc-shaped blades with the same arc direction as the rotation direction, and the grate tooth sealing structure formed by the grate tooth sealing structure and the honeycomb structure during rotation solves the problem that the sealing performance of the traditional grate tooth sealing structure cannot meet the requirement.
Description
Technical Field
The invention relates to a grate tooth sealing structure and a method suitable for the grate tooth sealing structure, and belongs to the technical field of aeroengines.
Background
The aeroengine works on the gas flowing through by using the rotating blades, so that the gas passing through the blades is compressed to raise the pressure, and the pressure-raised gas is required to be stored between the rotating part and the non-rotating part and then led out through the pipe; the present structure for sealing the air with increased pressure is composed of a rotating grate plate, a plurality of grate teeth distributed along the axis at intervals, and a honeycomb structure is arranged on a stationary part, as shown in fig. 6, although the structure for sealing the air with increased pressure (see the axial sealing structure between the wheel plates of a gas turbine disclosed in China CN 103541776B) can achieve the sealing and preservation of the air with increased pressure, the sealing performance of the present structure for sealing the grate teeth can not meet the requirement for the air compressor rotor with the engine pressure ratio of more than 3 because of higher requirements for the sealing performance of the grate teeth by the high thrust ratio than the engine.
Disclosure of Invention
In order to solve the technical problems, the invention provides a grate tooth sealing structure.
The invention also provides a method suitable for the castor tooth sealing structure.
The invention is realized by the following technical scheme.
The invention provides a grate tooth sealing structure, which comprises the following components:
comb teeth;
An arc-shaped blade; the bottom of the blade is fixedly connected with the bottom of the grate teeth;
The side of the grate teeth, which is close to the blade, is an inclined plane;
honeycomb structure over the top of the grate and blades.
The blades are ninety pieces which are uniformly spaced and fixed with the bottom of the grate teeth.
The height of the blade is 8mm, and the chord width of the blade root is 12mm.
The height L 3 of the grate teeth is 7mm.
The oblique angle theta 1 of the grate tooth leaning towards the inclined plane of the blade is 15 degrees, and the width L 4 of the grate tooth top is 0.5mm.
The interval L 2 between the honeycomb structure and the top of the grate tooth is 0.3mm.
The honeycomb radius R 1 is 150mm and the axial length L 1 is 25mm.
A method for a labyrinth seal structure comprising:
Step one, the grate teeth and ninety evenly-spaced blades are fixedly arranged on the grate tooth disc, and the arc direction of the blades is the same as the rotation direction of the grate tooth disc, so that the interval L2 between the honeycomb structure and the grate tooth top is 0.3mm;
And secondly, forming a 1485kPa high-pressure area on the left side of the grate, wherein the grate disc drives the grate and the blades to rotate at 15500 rpm.
The invention has the beneficial effects that: the low-pressure area on the right side of the inclined plane of the grate disc is provided with the arc-shaped blades with the same arc direction as the rotation direction, and the grate tooth sealing structure formed by the grate tooth sealing structure and the honeycomb structure during rotation solves the problem that the sealing performance of the traditional grate tooth sealing structure cannot meet the requirement.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic illustration of the air flow distribution of FIG. 1;
FIG. 3 is a top partial schematic view of FIG. 1;
FIG. 4 is a schematic diagram of the structure of the present invention;
FIG. 5 is a fluid simulation schematic of the structure of the present invention;
FIG. 6 is a prior art fluid simulation schematic;
In the figure: 1-grating teeth; 2-leaf blades; 3-a grate disc; 4-a stationary member; 5-honeycomb structure.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
As shown in fig. 1 to 5.
The invention relates to a grate tooth sealing structure, which comprises the following components:
when in use, the left side is the grate 1 which is formed by the gas compressed and pressure-increased;
When in use, the arc direction is the same as the rotation direction, the blade 2 is arc-shaped, and the right side of the blade 2 is a low-pressure area; the bottoms of the blades 2 and the bottoms of the grate teeth 1 are welded in a sealing way or integrally formed and fixed on a rotatable grate disc 3 to form fixed connection, the blades 2 are ninety pieces which are uniformly and hermetically welded and fixedly installed on the grate disc 3 at intervals, the height of the blades 2 on the grate disc 3 is 8mm, and the chord width of a blade root is 12mm;
The height L 3 of the grate teeth 1 on the grate disc 3 is 7mm; the side, close to the blade 2, of the grate tooth 1 is an inclined plane, the inclined angle theta 1 is 15 degrees, and the width L 4 of the top of the grate tooth 1 is 0.5mm;
a honeycomb structure 5 arranged on the static piece 4 and positioned above the tops of the grate teeth 1 and the blades 2, wherein the interval L 2 between the honeycomb structure 5 and the top of the grate teeth 1 is 0.3mm;
The radius R 1 of the honeycomb structure 5 is 150mm, and the axial length L 1 is 25mm.
A method for a labyrinth seal structure comprising:
Step one, the grate teeth 1 and ninety blades 2 which are uniformly and alternately distributed are hermetically and fixedly arranged on the grate disc 3 in a welding way, and the arc directions of the blades 2 are the same as the rotation direction of the grate disc 3, so that the interval L2 between the honeycomb structure 5 and the top of the grate teeth 1 is 0.3mm;
Step two, a high-pressure area of 1485kPa is formed on the left side of the grate 1, and the grate 3 drives the grate 1 and the blades 2 to rotate at 15500 rpm; at this time, the average pressure of the right side of the blade 2 is 1200kPa, the average pressure is 4.35×10 -11 kg/s, the lowest pressure is 1000kPa, the front-rear pressure ratio is 1.485, as shown in fig. 5, while the conventional structure for sealing the grate teeth is formed by adopting a plurality of grate teeth, the average pressure is 1246kPa, the air flow is 2.2×10 -10 kg/s, as shown in fig. 6, the sealing efficiency of the technology of the application is improved by 3.7%, the sealing performance meets the requirement, the air flow leakage is prevented from being improved by the magnitude, and then the low pressure area on the right side of the inclined surface of the grate disc 3 is provided with the blade 2 which has the arc direction the same as the rotation direction, and the structure for sealing the grate teeth is formed by the honeycomb structure 5 during rotation, so that the sealing performance of the conventional structure for sealing the grate teeth can not meet the requirement.
Claims (2)
1. A method suitable for a grate tooth sealing structure is characterized in that,
The grate tooth structure of sealing tightly includes:
grate teeth (1);
an arc-shaped blade (2); the bottom of the blade (2) is fixedly connected with the bottom of the grate teeth (1);
the side of the grate teeth (1) leaning towards the blades (2) is an inclined plane;
a honeycomb structure (5) arranged above the grate teeth (1) and the tops of the blades (2);
The oblique angle theta 1 of the inclined surface of the grate tooth (1) leaning towards the blade (2) is 15 degrees, and the width L4 of the top of the grate tooth (1) is 0.5mm;
The height of the blade (2) is 8mm, and the chord width of the blade root is 12mm;
the height L3 of the grate teeth (1) is 7mm;
The method comprises the following steps:
Step one, a grate (1) and ninety evenly-spaced blades (2) are fixedly arranged on a grate disc (3), and the arc direction of the blades (2) is the same as the rotation direction of the grate disc (3), so that the interval L2 between a honeycomb structure (5) and the top of the grate (1) is 0.3mm;
and secondly, forming a 1485kPa high-pressure area on the left side of the grate tooth (1), and driving the grate tooth (1) and the blades (2) to rotate at 15500rpm by the grate tooth disc (3).
2. The method for sealing a structure of a grate tooth according to claim 1, wherein: the radius R1 of the honeycomb structure (5) is 150mm, and the axial length L1 is 25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017566.XA CN114320487B (en) | 2022-01-07 | 2022-01-07 | Caster tooth sealing structure and method suitable for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017566.XA CN114320487B (en) | 2022-01-07 | 2022-01-07 | Caster tooth sealing structure and method suitable for same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114320487A CN114320487A (en) | 2022-04-12 |
| CN114320487B true CN114320487B (en) | 2024-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210017566.XA Active CN114320487B (en) | 2022-01-07 | 2022-01-07 | Caster tooth sealing structure and method suitable for same |
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| Country | Link |
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| CN (1) | CN114320487B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454026A (en) * | 2014-11-09 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Zigzag-shroud of aero-engine rotor vane |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004113770A2 (en) * | 2003-06-20 | 2004-12-29 | Elliott Company | Swirl-reversal abradable labyrinth seal |
| US20130230379A1 (en) * | 2012-03-01 | 2013-09-05 | General Electric Company | Rotating turbomachine component having a tip leakage flow guide |
| JP5951890B2 (en) * | 2013-04-03 | 2016-07-13 | 三菱重工業株式会社 | Rotating machine |
| CN103541776B (en) * | 2013-10-15 | 2015-12-30 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Axial seal structure between a kind of gas turbine wheel disk |
| CN104196751B (en) * | 2014-01-23 | 2016-08-10 | 南京航空航天大学 | Obturage for compressor/fan stator and air-breathing controls corner separation structure |
| WO2017155497A1 (en) * | 2016-03-07 | 2017-09-14 | Siemens Aktiengesellschaft | Gas turbine blade tip shroud sealing and flow guiding features |
-
2022
- 2022-01-07 CN CN202210017566.XA patent/CN114320487B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454026A (en) * | 2014-11-09 | 2015-03-25 | 沈阳黎明航空发动机(集团)有限责任公司 | Zigzag-shroud of aero-engine rotor vane |
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| Publication number | Publication date |
|---|---|
| CN114320487A (en) | 2022-04-12 |
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