CN118032149A - Wall temperature lead structure suitable for combustion chamber test - Google Patents
Wall temperature lead structure suitable for combustion chamber test Download PDFInfo
- Publication number
- CN118032149A CN118032149A CN202410071322.9A CN202410071322A CN118032149A CN 118032149 A CN118032149 A CN 118032149A CN 202410071322 A CN202410071322 A CN 202410071322A CN 118032149 A CN118032149 A CN 118032149A
- Authority
- CN
- China
- Prior art keywords
- threading
- cushion block
- inner hole
- axial
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 23
- 238000012360 testing method Methods 0.000 title claims abstract description 19
- 238000012856 packing Methods 0.000 claims abstract description 17
- 239000000945 filler Substances 0.000 claims abstract description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 239000010425 asbestos Substances 0.000 claims description 7
- 229910052895 riebeckite Inorganic materials 0.000 claims description 7
- 239000004568 cement Substances 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention provides a wall temperature lead structure suitable for a combustion chamber test, which comprises the following components: the lead seat is provided with an axial through hole; the lower threading cushion block is arranged in the axial through hole, is provided with a conical inner hole, is coaxial with the axial through hole and has a small diameter end facing downwards; the lead wire is arranged in the conical inner hole in a penetrating way and led out to the outer side; and the packing layer is arranged in the conical inner hole and positioned at the periphery of the lead, and can seal the small-diameter end of the conical inner hole. Through the grooving design, the threading operation of the small holes is changed from axial to radial, so that the threading working efficiency is improved, and meanwhile, the possibility of damage of the thermocouple in the threading process is avoided; the aperture of the conical inner hole is matched according to the number of thermocouples, so that the problem of sealing failure caused by sliding leakage due to oversized holes of sealing filler is prevented.
Description
Technical Field
The invention relates to the technical field of aero-engines and heavy-duty gas turbine test devices, in particular to a wall temperature lead structure suitable for a combustion chamber test.
Background
The combustion chamber is one of three core components of the aero-engine and the gas turbine, and the design quality of the combustion chamber directly influences the performance of the whole machine; in the development process, the temperature of the wall surface of the flame tube of the combustion chamber needs to be measured and monitored, so that the temperature of the flame tube is ensured not to exceed the allowable temperature of materials, and the test safety is ensured. The most commonly used flame tube wall temperature measuring means at present is a wall temperature thermocouple, the thermocouple is laid on the flame tube wall, and a compensating lead is led out from a combustion chamber casing and connected into a testing module, so that real-time wall temperature data are obtained. And the compensating lead is led out from the combustion chamber casing, so that an applicable lead structure is needed, and the on-site operation is convenient on the premise of ensuring good sealing. Because of the shape characteristic of the wall temperature thermocouple, the current wall temperature lead seat is sealed by using a filler, and common fillers include asbestos ropes, high-temperature glue, high-temperature cement and the like. The packing seal has certain requirements on the diameter of the lower opening, the oversized opening can cause the sealing packing to slide and leak to cause sealing failure, and the thermocouple perforation work becomes very difficult under the condition of smaller opening, so that the thermocouple is easy to damage in the installation process, and a great amount of time is required.
Disclosure of Invention
In view of the above, the invention provides a wall temperature lead structure suitable for a combustion chamber test, so as to realize rapid threading in the process of leading out a thermocouple of the wall of the combustion chamber and reliable sealing in a high-temperature and high-pressure environment.
The embodiment of the specification provides the following technical scheme: a wall temperature lead structure suitable for combustion chamber testing, comprising: the lead seat is provided with an axial through hole; the lower threading cushion block is arranged in the axial through hole, is provided with a conical inner hole, is coaxial with the axial through hole and has a small diameter end facing downwards; the lead wire is arranged in the conical inner hole in a penetrating way and led out to the outer side; and the packing layer is arranged in the conical inner hole and positioned at the periphery of the lead, and can seal the small-diameter end of the conical inner hole.
Further, the method further comprises the following steps: the upper threading cushion block is arranged above the lower threading cushion block and is abutted with the packing layer; and the compression nut is detachably connected with the lead seat and can compress the upper threading cushion block, the packing layer and the lower threading cushion block.
Further, the upper threading cushion block is provided with an axial inner hole, the axial inner hole is coaxial with the axial through hole, and the lead wire can pass through the axial inner hole to penetrate to the outer side.
Further, the lower end of the axial inner hole is of a conical structure, and the large-diameter end of the conical structure faces to the lower threading cushion block.
Further, the compression nut is connected with the lead seat by adopting a threaded structure.
Further, the filler layer comprises asbestos rope and high temperature glue or asbestos rope and high temperature cement.
Further, the difference between the diameter of the small diameter end of the conical inner hole and the diameter of the lead wire is 1-2 mm.
Further, the lower threading cushion block and the upper threading cushion block are respectively provided with a threading groove, and the threading groove of the lower threading cushion block extends to the axial through hole from the side wall of the lower threading cushion block; the threading groove of the upper threading cushion block extends to the axial inner hole from the side wall of the upper threading cushion block.
Compared with the prior art, the beneficial effects that above-mentioned at least one technical scheme that this description embodiment adopted can reach include at least: through the grooving design, the threading operation of the small holes is changed from axial to radial, so that the threading working efficiency is improved, and meanwhile, the possibility of damage of the thermocouple in the threading process is avoided; the aperture of the conical inner hole is matched according to the number of thermocouples, so that the problem of sealing failure caused by sliding leakage due to oversized holes of sealing filler is prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an embodiment of the present invention.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
As shown in fig. 1, an embodiment of the present invention provides a wall temperature lead structure suitable for a combustion chamber test, including: the wire holder 5, the lower threading cushion block 4, the wire 6 and the packing layer 3. The lead seat 5 is provided with an axial through hole; the lower threading cushion block 4 is arranged in the axial through hole, the lower threading cushion block 4 is provided with a conical inner hole, the conical inner hole is coaxial with the axial through hole, and the small diameter end of the conical inner hole faces downwards; the lead 6 is arranged in the conical inner hole in a penetrating way and led out to the outer side; the packing layer 3 is arranged in the conical inner hole and is positioned at the periphery of the lead 6, and the packing layer 3 can seal the small-diameter end of the conical inner hole.
Through the grooving design, the threading operation of the small holes is changed from axial to radial, so that the threading working efficiency is improved, and meanwhile, the possibility of damage of the thermocouple in the threading process is avoided; the aperture of the conical inner hole is matched according to the number of thermocouples, so that the problem of sealing failure caused by sliding leakage due to oversized holes of sealing filler is prevented.
The lower threading cushion block 4 is matched with the lead seat 5 for use, and the conical inner hole of the lower threading cushion block is combined with the inner conical surface of the lead seat 5 to form a coherent conical surface, so that the packing layer 3 is convenient to compress tightly, and the sealing effect is achieved.
Preferably, the diameter of the conical inner hole of the lower threading cushion block 4 is smaller than the diameter of the axial through hole of the lead seat 5, and the diameter of the hole can accommodate a wall temperature thermocouple, so that the filler layer 3 is prevented from sliding and leaking.
The invention is suitable for the wall temperature lead structure of the combustion chamber test, and also comprises an upper threading cushion block 1 and a compression nut 2. The upper threading cushion block 1 is arranged above the lower threading cushion block 4 and is abutted with the packing layer 3; the compression nut 2 is detachably connected with the lead seat 5, and the compression nut 2 can compress the upper threading cushion block 1, the packing layer 3 and the lower threading cushion block 4.
The upper threading cushion block 1 is provided with an axial inner hole, the axial inner hole is coaxial with the axial through hole, and the lead 6 can pass through the axial inner hole to penetrate to the outer side.
Preferably, the lower end of the axial inner hole is in a conical structure, and the large-diameter end of the conical structure faces to the lower threading cushion block 4. The lower end of the upper threading cushion block 1 is arranged to be of an inner cone structure, and the packing layer 3 is pressed downwards and the pressing force towards the center is further concentrated.
In the embodiment of the invention, the lower end of the upper threading cushion block 1 is chamfered, so that the lower end is convenient to center in the inner hole of the lead seat 5 in the compaction process.
Furthermore, flat openings are formed on two sides of the upper end of the upper threading cushion block 1, so that the thermocouple is prevented from being damaged due to the fact that the upper threading cushion block 1 rotates along with the compression nut 2. The lower threading cushion block 4 and the upper threading cushion block 1 are respectively provided with a threading groove, and the threading groove of the lower threading cushion block 4 extends to the axial through hole from the side wall of the lower threading cushion block 4; the threading groove of the upper threading cushion block 1 extends to the axial inner hole from the side wall of the upper threading cushion block 1. The lateral threading mode is adopted, so that the problems of difficult threading and easy damage of the thermocouple caused by the axial threading mode are avoided.
The compression nut 2 is connected to the lead frame 5 by a screw structure. The filler layer 3 comprises asbestos ropes and high-temperature glue or asbestos ropes and high-temperature cement. The diameter difference between the diameter of the small diameter end of the conical inner hole and the diameter of the lead wire 6 is 1-2 mm.
The invention can support the aero-engine and the gas turbine to smoothly develop the experiment related to the wall temperature of the main combustion chamber; the structure changes the small hole threading operation from axial to radial through the grooving design of the upper cushion block and the lower cushion block, improves the threading work efficiency and simultaneously avoids the possibility of damage of the thermocouple in the threading process; the diameters of the upper threading cushion blocks and the lower threading cushion blocks are matched according to the number of thermocouples, so that the problem of sealing failure caused by sliding leakage due to oversized openings of sealing fillers is prevented; and flat-mouth structures are adopted on two sides of the upper end of the upper threading cushion block, so that the thermocouple is prevented from being damaged due to the fact that the upper threading cushion block rotates along with the rotation when the pressure cap rotates.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (8)
1. A wall temperature lead structure suitable for combustion chamber testing, comprising:
The lead seat (5) is provided with an axial through hole;
The lower threading cushion block (4) is arranged in the axial through hole, the lower threading cushion block (4) is provided with a conical inner hole, the conical inner hole is coaxial with the axial through hole, and the small diameter end of the conical inner hole faces downwards;
the lead (6) is arranged in the conical inner hole in a penetrating way and led out to the outer side;
The packing layer (3) is arranged in the conical inner hole and positioned at the periphery of the lead wire (6), and the packing layer (3) can seal the small-diameter end of the conical inner hole.
2. The wall temperature lead structure for combustion chamber testing of claim 1, further comprising:
The upper threading cushion block (1) is arranged above the lower threading cushion block (4) and is abutted with the packing layer (3);
the compression nut (2) is detachably connected with the lead seat (5), and the compression nut (2) can compress the upper threading cushion block (1), the packing layer (3) and the lower threading cushion block (4).
3. Wall temperature lead structure suitable for combustion chamber tests according to claim 2, characterized in that the upper threading pad (1) is provided with an axial inner bore coaxial with the axial through hole through which the lead (6) can pass out to the outside.
4. A wall temperature lead structure suitable for combustion chamber testing according to claim 3, wherein the lower end of the axial inner hole is of a conical structure, and the large diameter end of the conical structure faces to the lower threading cushion block (4).
5. Wall temperature lead structure suitable for combustion chamber test according to claim 2, characterized in that the compression nut (2) is connected with the lead seat (5) by a screw structure.
6. Wall temperature lead structure suitable for combustion chamber testing according to claim 1, characterized in that the filler layer (3) comprises asbestos rope and high temperature glue or asbestos rope and high temperature cement.
7. The wall temperature lead structure suitable for combustion chamber test according to claim 1, wherein the difference between the diameter of the small diameter end of the conical inner hole and the diameter of the lead (6) is 1-2 mm.
8. A wall temperature lead structure suitable for combustion chamber tests according to claim 3, characterized in that the lower threading cushion block (4) and the upper threading cushion block (1) are provided with threading grooves, and the threading grooves of the lower threading cushion block (4) extend from the side wall of the lower threading cushion block (4) to the axial through hole; the threading groove of the upper threading cushion block (1) extends from the side wall of the upper threading cushion block (1) to the axial inner hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410071322.9A CN118032149A (en) | 2024-01-18 | 2024-01-18 | Wall temperature lead structure suitable for combustion chamber test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410071322.9A CN118032149A (en) | 2024-01-18 | 2024-01-18 | Wall temperature lead structure suitable for combustion chamber test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118032149A true CN118032149A (en) | 2024-05-14 |
Family
ID=91001210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410071322.9A Pending CN118032149A (en) | 2024-01-18 | 2024-01-18 | Wall temperature lead structure suitable for combustion chamber test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118032149A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735548A (en) * | 2019-12-13 | 2020-10-02 | 湖南汉能科技有限公司 | Thermocouple installation protection device |
-
2024
- 2024-01-18 CN CN202410071322.9A patent/CN118032149A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735548A (en) * | 2019-12-13 | 2020-10-02 | 湖南汉能科技有限公司 | Thermocouple installation protection device |
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