CN116951184A - Test pipeline sealing structure of gas turbine - Google Patents
Test pipeline sealing structure of gas turbine Download PDFInfo
- Publication number
- CN116951184A CN116951184A CN202311212224.4A CN202311212224A CN116951184A CN 116951184 A CN116951184 A CN 116951184A CN 202311212224 A CN202311212224 A CN 202311212224A CN 116951184 A CN116951184 A CN 116951184A
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- China
- Prior art keywords
- hole
- sealing
- lead
- diameter
- gas turbine
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- 238000007789 sealing Methods 0.000 title claims abstract description 184
- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 239000002184 metal Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 15
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 9
- 238000007711 solidification Methods 0.000 abstract description 3
- 230000008023 solidification Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 239000000565 sealant Substances 0.000 description 13
- 238000013461 design Methods 0.000 description 11
- 230000000295 complement effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/28—Arrangement of seals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/061—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with positioning means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/14—Sealings between relatively-stationary surfaces by means of granular or plastic material, or fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/06—Sealing by means of a swivel nut compressing a ring or sleeve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
- F16L5/02—Sealing
- F16L5/14—Sealing for double-walled or multi-channel pipes
-
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/22—Installations of cables or lines through walls, floors or ceilings, e.g. into buildings
Abstract
The invention belongs to the technical field of gas turbine testing, and particularly relates to a test pipeline sealing structure of a gas turbine, which comprises a mounting seat, a sealing bowl, a bottom sealing gasket, sealing soft mud, a top sealing gasket and an outer sleeve thread cover; the sealing bowl is arranged in the outer pipe opening of the mounting seat; the bottom sealing gasket and the top sealing gasket are C-shaped; the outer sleeve threaded cover is in threaded connection with an outer pipe orifice of the mounting seat and is provided with a threading hole; the sealing cement is filled in the sealing bowl for gap filling. According to the scheme, flexible materials such as rubber mud are used as sealing mediums, the solidification time is short, and the testing efficiency is improved; the sealing soft mud is convenient to clean, so that the damage of the test pipeline is reduced, and the protection of the test pipeline is realized; the sealing medium is restrained by the space formed by the sealing bowl and the sealing gasket, so that the sealing medium is prevented from entering the gas turbine, and the sealing medium cannot fall off under the action of the internal pressure of the gas turbine, so that the sealing reliability is effectively ensured.
Description
Technical Field
The invention belongs to the technical field of gas turbine testing, and particularly relates to a test pipeline sealing structure of a gas turbine.
Background
In the gas turbine test process, runner parameters are often required to be acquired to acquire the performance and the running state of an engine, and the parameters required to be measured generally include pressure, temperature and the like; in the pressure parameter measurement process, the pressure is usually led out of a casing of the gas turbine and transmitted to a test cabinet by a capillary metal pipe extending into a test point, and the pressure is converted into an electric signal by a corresponding pressure module on the test cabinet, so that the measurement of the pressure parameter is realized. In measurement of temperature parameters, a thermocouple is often required to be placed at a test point to acquire an electrical signal, and then the electrical signal is transmitted to a test system through a cable.
Test pipelines such as capillary metal pipes, cables and the like often need to penetrate into a casing of the gas turbine, so that the test pipelines often need to be sealed at corresponding lead test holes, the lead test holes are often sealed by sealant in the prior art, and after the sealant is solidified and shaped, the sealing effect can be achieved. And do not set up special seal structure, lead to the sealant to get into non-seal area easily, probably lead to the sealant to get into gas turbine on the one hand, on the other hand leads to the sealant to be difficult to clear up in non-seal area, this kind of sealing means often need use a large amount of sealants, and sealant own intensity is weaker, fragile under the high pressure effect. Meanwhile, the sealant needing to be solidified has long operation period, and the sealant generally needs to be kept stand for more than 24 hours to realize sealing, and meanwhile, the sealant is bonded with the capillary metal pipe and the cable after being solidified, so that the surface of the test pipeline is easy to decompose, the capillary metal pipe and the cable are easy to damage, the residual sealant on the capillary metal pipe and the cable is difficult to clean, and the free combination of the capillary metal pipe and the cable is adversely affected when temperature and pressure tests are carried out at different positions of different gas turbines.
Therefore, it is necessary to design a sealing structure which is free from solidification, easy to clean, long in service life and high in safety, so as to seal the test pipeline at the test point of the casing of the gas turbine.
Disclosure of Invention
In order to solve the problems in the prior art, the scheme provides a test pipeline sealing structure of a gas turbine.
The technical scheme adopted by the invention is as follows:
a test pipeline sealing structure of a gas turbine comprises a mounting seat, a sealing bowl, a bottom sealing gasket, sealing soft mud, a top sealing gasket and an outer sleeve thread cover;
the mounting seat is sleeve-shaped and is mounted at a lead test hole of a casing main body of the gas turbine;
the sealing bowl is arranged in the outer pipe opening of the mounting seat, a bottom hole and a cavity hole are arranged in the sealing bowl, and the bottom hole and the cavity hole are coaxial and matched to form a step hole;
the bottom sealing gasket is C-shaped, a first lead hole is eccentrically formed in the middle of the bottom sealing gasket, and a first lead groove is formed in one side of the first lead hole; the bottom sealing gasket is propped against the hole edge of the bottom hole;
the top sealing gasket is C-shaped, a second lead hole is eccentrically formed in the middle of the top sealing gasket, and a second lead groove is formed in one side of the second lead hole; the top sealing gasket abuts against the hole edge of Rong Qiangkong;
the outer sleeve threaded cover is in threaded connection with an outer pipe opening of the mounting seat, and a threading hole is formed in the middle of the outer sleeve threaded cover;
and when the test pipeline passes through the sealing structure and stretches into the casing main body, the sealing soft mud fills and seals the hole gap of the cavity hole and the line-to-line gap of the test pipeline.
As an alternative or complementary design to the above-described sealing structure: a flange part is arranged on the outer pipe wall of the mounting seat; the flange part is sealed on the outer side wall of the casing main body through a sealing gasket and is fixed by bolts passing through the flange part, the casing main body and the flange part.
As an alternative or complementary design to the above-described sealing structure: the outer side wall of the outer end of the sealing bowl is conical and forms a conical sealing surface; when the outer sleeve threaded cover is screwed, the sealing bowl is abutted tightly, so that the sealing surface is in sealing fit on the conical pipe wall of the mounting seat.
As an alternative or complementary design to the above-described sealing structure: the sealing soft mud is selected from rubber mud or sealing glue.
As an alternative or complementary design to the above-described sealing structure: the test line comprises at least one capillary metal tube and/or at least one cable; the capillary metal tube and the cable comprise a joint and a wire body; the first and second lead holes can be penetrated by any joint and can accommodate all the wire bodies.
As an alternative or complementary design to the above-described sealing structure: the width of the notch of the first lead slot and the second lead slot is larger than the diameter of the wire body of any capillary metal tube or any cable.
As an alternative or complementary design to the above-described sealing structure: the aperture of the bottom hole of the sealing bowl is d 7 The first lead hole of the bottom sealing gasket has a diameter d 81 The aperture of the top sealing gasket is d 101 Aperture d of bottom hole 7 Aperture d of first lead hole 81 And the aperture d of the second lead hole 101 The method comprises the steps of determining the minimum inscribed circle by a drawing method; diameter of all joints in capillary metal tubes and cablesMaximum value d 61max The maximum diameter of the wire body of all capillary metal pipes and cables is d 62max The diameter of the wire body of the rest capillary metal tube and the cable is d 62 ；
In determining the pore diameter d of the bottom hole 7 When using d 61max To diameter round, then d 62 To draw circles of diameter, each d 62 Diameter circle and d 61max To make the diameter circle tangent, a minimum inscribed circle is drawn by a drawing method to contain d 61max Is a circle of diameter and all d 62 Circle of diameter d 7 A diameter value for the minimum inscribed circle;
in determining the aperture d of the first lead hole 81 And the aperture d of the second lead hole 101 When using d 62max To diameter round, then d 62 To draw circles of diameter, each d 62 Diameter circle and d 62max To be tangent to a circle of diameter, drawing another minimum inscribed circle by a drawing method so as to contain d 62max Is a circle of diameter and all d 62 Circle of diameter d 81 And d 101 Is another diameter value of the minimum inscribed circle.
As an alternative or complementary design to the above-described sealing structure: when the bottom sealing gasket is propped against the hole edge of the bottom hole, the first lead groove is overlapped on the step surface between the bottom hole and the cavity hole, and the first lead hole is intersected or tangent with the hole edge of the bottom hole.
As an alternative or complementary design to the above-described sealing structure: when the top sealing gasket is abutted against the hole edge of Rong Qiangkong and is abutted against by the outer sleeve threaded cover, the first lead groove is attached to the inner bottom of the outer sleeve threaded cover, and the second lead hole is intersected or tangent with the hole edge of the threading hole.
As an alternative or complementary design to the above-described sealing structure: the sealing soft mud adopts rubber mud.
The beneficial effects of the invention are as follows:
1. in the scheme, flexible materials such as rubber mud are adopted as sealing medium, so that the solidification time is short, and the testing efficiency is improved; the sealing soft mud is convenient to clean, so that the damage of the test pipeline is reduced, and the protection of the test pipeline is realized; the sealing medium is restrained by a space formed by the sealing bowl and the sealing gasket, so that the sealing medium is prevented from entering the gas turbine, and the sealing medium cannot fall off under the action of the internal pressure of the gas turbine, so that the sealing reliability is effectively ensured;
2. the sealing bowl structure can restrict the sealing medium in the bowl, so that leakage is effectively reduced; meanwhile, the bottom sealing gasket and the top sealing gasket are matched, so that the installation threading process is more efficient, the construction time is saved, and the size of the lead hole is effectively ensured to be matched with the diameter of the pipeline; the outer sleeve threaded cover can apply pressure to the sealing area, so that the sealing bowl is tightly attached to the bottom opening sealing gasket and the top opening sealing gasket, gaps are reduced, and meanwhile, the sealing body is prevented from moving;
3. the sealing bowl, the bottom sealing gasket, the top sealing gasket, the outer sleeve threaded cover and the like adopt combined structures, and can be freely selected and matched, so that the sizes of holes are adjusted to meet the requirements of different numbers of test pipelines, and the sealing bowl, the bottom sealing gasket, the top sealing gasket, the outer sleeve threaded cover and the like have good universality;
4. can replace the rubber mud and glue for the sealant, can further promote leakproofness and fastness to can effectively retrain the scope of action of sealant, reduce the decomposition degree of difficulty, after the test finishes, through getting rid of parts such as capillary metal tube and cable, sealing bowl, bottom sealing washer, rubber mud, top sealing washer, and steps such as change the overcoat screw cap that does not take the hole, can resume the combustion turbine to service condition fast.
Drawings
In order to more clearly illustrate the embodiments of the present solution or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a view showing the state of use of the seal structure in the present embodiment;
FIG. 2 is a diagram of an exemplary configuration of a single test line;
FIG. 3 is a block diagram of a seal bowl;
FIG. 4 is a structural example diagram of a bottom sealing gasket;
FIG. 5 is a block diagram of a top sealing gasket;
FIG. 6 is a block diagram of a male screw cap;
FIG. 7 is a plot of determination d 7 Schematic of (2);
FIG. 8 is a plot of d 81 And d 101 Is a schematic diagram of (a).
In the figure: 1-a casing body; 2-a gasket; 3-mounting seats; 4-bolts; 5-an outer sleeve screw cap; 51-threading holes; 52-a safety hole; 53-internal threads; 6-test line; 61-linker; 62-line body; 7-sealing the bowl; 71-bottom hole; 72-a cavity hole; 73-sealing surface; 8-bottom sealing gasket; 81-a first lead hole; 82-a first wire slot; 9-rubber mud; 10-top sealing gasket; 101-a second lead hole; 102-second lead grooves.
Detailed Description
The technical solutions of the present embodiment will be clearly and completely described below with reference to the accompanying drawings, and the described embodiments are only some embodiments, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any creative effort based on the embodiments of the present embodiment are all within the protection scope of the present solution.
Example 1
As shown in fig. 1 to 6, the present embodiment designs a test line sealing structure of a gas turbine, which includes a mounting seat 3, a sealing bowl 7, a bottom sealing gasket 8, sealing mud, a top sealing gasket 10, an outer screw cap 5, and the like.
The casing main body 1 of the gas turbine is a casing of the gas turbine, and because the casing of the gas turbine includes more components, the parts which will not rotate with the rotor of the gas turbine are all referred to as the casing main body 1 in this embodiment, lead test holes are respectively arranged at different positions of the casing main body 1, the lead test holes are communicated to an internal runner of the casing main body 1 from the outside of the casing main body 1, and when parameters such as pressure, temperature and the like of the runner are required to be acquired to acquire the performance and the running state of the engine, the test pipeline 6 is used to penetrate into the casing main body 1 of the gas turbine to detect corresponding parameters.
The test line 6 comprises capillary metal tubes and cables, each comprising a connector 61 and a body 62. The wire body 62 of the capillary metal pipe is a metal pipe, the joint 61 of the capillary metal pipe is a pipe head of the metal pipe or an air guide auxiliary head connected with the end of the metal pipe, and in the pressure parameter measurement process, the capillary metal pipe stretches into a test point from a lead test hole so as to lead the pressure out of a casing of the gas turbine and transmit the pressure to a test cabinet, and a corresponding pressure module on the test cabinet converts the pressure into an electric signal, thereby realizing the pressure parameter measurement. The wire body 62 of the cable is a high-temperature-resistant wire, the connector 61 of the cable is a thermocouple, and in the measurement of temperature parameters, the cable extends from the lead test hole to the test point, and an electric signal is acquired through the thermocouple and then transmitted into the test system through the cable.
Since the number and location of test points at which temperature and pressure tests are performed at different locations of the gas turbine are different, the test line 6 comprises at least one capillary metal tube and/or at least one cable; each of the capillary metal tube and the cable includes a connector 61 and a wire body 62.
The mounting seat 3 is sleeve-shaped and is mounted at a lead test hole of the casing main body 1 of the gas turbine; be provided with flange portion on the outer pipe wall of mount pad 3, when mount pad 3 installs lead wire test hole department, the interior mouth end of this mount pad 3 inserts in the lead wire test hole, simultaneously the hole edge department of lead wire test hole is laminated to the side of flange portion to thereby establish between lateral wall and flange portion of receiver main part 1 through sealed pad 2 pad and realize sealedly, thereby bolt 4 passes flange portion, sealed pad 2 and the lateral wall of receiver main part 1 in order to be fixed mount pad 3 to receiver main part 1.
The sealing bowl 7 is arranged in the outer pipe mouth of the mounting seat 3, a bottom hole 71 and a cavity hole 72 are arranged in the sealing bowl 7, the bottom hole 71 and the cavity hole 72 are coaxial, the bottom hole 71 and the cavity hole 72 are matched to form a step hole, a step surface between the bottom hole 71 and the cavity hole 72 is used for supporting the bottom sealing gasket 8, an end surface at the edge of the cavity hole 72 is used for supporting the top sealing gasket 10, and the bottom hole 71 is used for penetrating the test pipeline 6. The outer side wall of the outer end of the sealing bowl 7 is conical, so that a conical sealing surface 73 is formed, the inner wall of the outer pipe opening of the mounting seat 3 is provided with a conical pipe wall matched with the sealing surface 73, and when the outer sleeve threaded cover 5 is screwed to the outer pipe opening of the mounting seat 3, the sealing surface 73 can be in sealing fit on the conical pipe wall of the mounting seat 3.
The bottom sealing gasket 8 is C-shaped, a first lead hole 81 is formed in the middle of the bottom sealing gasket 8, the first lead hole 81 is eccentric to the bottom sealing gasket 8, a first lead groove 82 is formed in one side of the first lead hole 81, and the first lead groove 82 is communicated with the first lead hole 81 from the radial outer side of the bottom sealing gasket 8. When the bottom sealing gasket 8 is put into the sealing bowl 7, the bottom sealing gasket 8 abuts against the hole edge of the bottom hole 71, that is, against the step surface between the bottom hole 71 and the accommodating hole, and the first lead hole 81 can be penetrated by any joint 61 and can accommodate all the wire body 62. The width of the notch of the first wire guiding groove 82 is larger than the diameter d of the wire body 62 of any capillary metal tube or any cable 62max . And when the bottom sealing gasket 8 is propped against the hole edge of the bottom hole 71, the first lead wire groove 82 is overlapped on the step surface between the bottom hole 71 and the cavity hole 72, and the hole edges of the first lead wire hole 81 and the bottom hole 71 are intersected or tangential, so that all capillary metal pipes and cables are gathered into the first lead wire hole 81, and meanwhile, the line-to-line gaps of the test pipelines 6 such as the capillary metal pipes and the cables are reduced, thereby facilitating the sealing of the rubber cement 9 and reducing the probability that the rubber cement 9 is extruded from the first lead wire hole 81. The depth of the first wire groove 82 is smaller than the radius difference between the receiving hole and the bottom hole 71, the first wire groove 82 is located at the closest distance between the first wire hole 81 and the outer edge of the bottom sealing gasket 8, and the depth of the first wire groove 82 refers to the grooving distance along the radial direction of the bottom sealing gasket 8.
The top sealing gasket 10 is C-shaped, a second lead hole 101 is eccentrically arranged in the middle of the top sealing gasket 10, and a second lead groove 102 is arranged on one side of the second lead hole 101. The top sealing gasket 10 can abut against the hole edge of Rong Qiangkong 72; the second lead hole 101 can be penetrated by an arbitrary joint 61 and can accommodate all the wire body 62. The width of the notch of the second wire guiding groove 102 is larger than the diameter of the wire body 62 of any capillary metal tube or any cable. And when the top sealing gasket 10 is propped against the hole edge of the accommodating hole, the second lead wire groove 102 is overlapped on the inner bottom surface of the outer sleeve threaded cover 5, and the hole edges of the lead wire holes 51 are intersected or tangential, so that all the capillary metal pipes and cables are gathered into the second lead wire hole 101, and meanwhile, the line-to-line gaps of the test pipelines 6 such as the capillary metal pipes and the cables are reduced, thereby being convenient for sealing the rubber cement 9 and reducing the probability that the rubber cement 9 is extruded from the second lead wire hole 101. The groove second lead groove 102 is located at the closest distance of the second lead hole 101 from the outer edge of the top sealing gasket 10, and the depth of the second lead groove 102 refers to its grooving distance along the radial direction of the top sealing gasket 10.
The outer threaded cover 5 is in threaded connection with the outer pipe opening of the mounting seat 3, the inner threads 53 are arranged on the outer threaded cover 5, and the outer threads are arranged on the outer side of the outer pipe opening of the mounting seat 3, so that the outer threaded cover 5 can be in threaded connection with the outer pipe opening of the mounting seat 3. A threading hole 51 is arranged in the middle of the outer sleeve thread cover 5; when the top sealing gasket 10 abuts against the hole edge of the Rong Qiangkong 72, the top sealing gasket is abutted against by the outer sleeve threaded cover 5, at this time, the first wire guiding groove 82 is attached to the inner bottom of the outer sleeve threaded cover 5, and the second wire guiding hole 101 is intersected or tangential with the hole edge of the wire guiding hole 51, so that the probability that the rubber cement 9 is extruded from the wire guiding hole 51 is reduced. The bore diameter of the external screw cap 5 should be such that the penetration when the joint 61 and the shank 62 of all test lines 6 are combined to the minimum diameter is satisfied.
The sealing cement is filled in the sealing bowl 7, and the sealing cement is selected to have tightness, certain soft characteristics and certain viscosity, such as: the sealing soft mud can be rubber mud 9, and when the test pipeline 6 passes through the sealing structure and stretches into the casing main body 1, the sealing soft mud fills and seals the hole gap of the cavity hole 72 and the line-to-line gap of the test pipeline 6.
When the test line 6 is installed using the sealing structure in the present embodiment:
1. the gasket 2 and the mounting seat 3 are fixed on a mechanical base body through bolts 4, and locking and stopping are performed by using locking plates or fuses.
2. The capillary metal tube and cable are passed through the sealing bowl 7 and the sealing bowl 7 is pressed into the mounting seat 3.
3. The capillary metal tube and the cable are led into the first lead hole 81 through the first lead groove 82, and the bottom sealing gasket 8 is pressed into the bottom of the cavity hole 72 of the sealing bowl 7.
4. A sufficient amount of rubber cement 9 is injected into the cavity hole 72 to ensure that the gaps in the cavity hole 72 and the gaps between the capillary metal tube and the cable are fully filled.
5. The capillary metal tube and the cable are led into the second lead hole 101 through the second lead groove 102, and the top sealing gasket 10 is attached to the upper surface of the sealing bowl 7.
6. The outer ends of the test pipelines 6 such as capillary metal pipes, cables and the like penetrate through the jacketing nuts, the jacketing nuts are in threaded connection with the mounting seat 3, the top sealing gasket 10 is fully attached and pressed with the sealing bowl 7 and the jacketing nuts, and then fuses are arranged in the other safety holes 52 to lock and stop.
After the test is completed, the combustion turbine can be quickly restored to the use state by removing the parts such as the capillary metal tube, the cable, the sealing bowl 7, the bottom sealing gasket 8, the rubber mud 9 and the like, the top sealing gasket 10, replacing the outer sleeve threaded cover 5 without holes and the like.
Example 2
On the basis of the structure of embodiment 1, in order to improve the sealing effect of the sealing soft mud, the hole structures of the installation seat, the sealing bowl, the bottom sealing gasket, the sealing soft mud, the top sealing gasket, the outer sleeve thread cover and other parts are optimized.
The aperture of the bottom hole of the sealing bowl 7 is d 7 The first lead hole 81 of the bottom sealing gasket 8 has a diameter d 81 The second lead hole 101 of the top sealing gasket 10 has a hole diameter d 101 Aperture d of bottom hole 7 Aperture d of first lead hole 81 81 And the aperture d of the second lead hole 101 101 The method comprises the steps of determining the minimum inscribed circle by a drawing method; all capillary metal tubes and cables have a diameter d of the joint 61 Wherein the maximum diameter is d 61max The maximum diameter of the wire body of all capillary metal pipes and cables is d 62max The diameter of the wire body of the rest capillary metal tube and the cable is d 62 ；
As shown in fig. 7, in determining d 7 When using d 61max To diameter round, then d 62 To draw circles of diameter, each d 62 Diameter circle and d 61max To make the diameter circle tangent, a minimum inscribed circle is drawn by a drawing method to contain d 61max Is a circle of diameter and all d 62 Circle of diameter d 7 A diameter value for the minimum inscribed circle;
as shown in fig. 8, in determining the aperture d of the first lead hole 81 81 And the aperture d of the second lead hole 101 101 When using d 62max To diameter round, then d 62 To draw circles of diameter, each d 62 Diameter circle and d 62max To be tangent to a circle of diameter, drawing another minimum inscribed circle by a drawing method so as to contain d 62max Is a circle of diameter and all d 62 Diameter circle, aperture d of first lead hole 81 81 And the aperture d of the second lead hole 101 101 Is another diameter value of the minimum inscribed circle.
The above examples are presented for the purpose of illustration only and are not intended to be limiting of the embodiments; it is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present technology.
Claims (10)
1. A test line seal structure for a gas turbine, characterized by: comprises a mounting seat (3), a sealing bowl (7), a bottom sealing gasket (8), sealing soft mud, a top sealing gasket (10) and an outer sleeve thread cover (5);
the mounting seat (3) is sleeve-shaped and is mounted at a lead test hole of the casing main body (1) of the gas turbine;
the sealing bowl (7) is arranged in the outer pipe orifice of the mounting seat (3), a bottom hole (71) and a cavity hole (72) are arranged in the sealing bowl (7), and the bottom hole (71) and the cavity hole (72) are coaxial and matched to form a step hole;
the bottom sealing gasket (8) is C-shaped, a first lead hole (81) is eccentrically arranged in the middle of the bottom sealing gasket, and a first lead groove (82) is arranged on one side of the first lead hole (81); the bottom sealing gasket (8) is propped against the hole edge of the bottom hole (71);
the top sealing gasket (10) is C-shaped, a second lead hole (101) is eccentrically arranged in the middle of the top sealing gasket, and a second lead groove (102) is arranged on one side of the second lead hole (101); the top sealing gasket (10) is abutted against the hole edge of the Rong Qiangkong (72);
the outer sleeve threaded cover (5) is in threaded connection with an outer pipe opening of the mounting seat, and a threading hole (51) is formed in the middle of the outer sleeve threaded cover;
and when the test pipeline (6) passes through the sealing structure and stretches into the casing main body (1), the sealing soft mud fills and seals the hole gap of the cavity hole (72) and the line-to-line gap of the test pipeline (6).
2. The test line seal for a gas turbine according to claim 1, wherein: a flange part is arranged on the outer pipe wall of the mounting seat (3); the flange part is sealed on the outer side wall of the casing main body (1) through a sealing gasket (2) and is fixed by bolts (4) penetrating the flange part, the casing main body and the casing main body.
3. The test line seal for a gas turbine according to claim 1, wherein: the outer side wall of the outer end of the sealing bowl (7) is conical, and a conical sealing surface (73) is formed; when the outer sleeve threaded cover (5) is screwed, the sealing bowl (7) is abutted tightly, so that the sealing surface (73) is in sealing fit with the conical pipe wall of the mounting seat (3).
4. The test line seal for a gas turbine according to claim 1, wherein: the sealing soft mud is rubber mud (9).
5. The test line seal for a gas turbine according to claim 1, wherein: the test line (6) comprises at least one capillary metal tube and/or at least one cable; the capillary metal tube and the cable comprise a joint (61) and a wire body (62); the first and second lead holes (81, 101) can be penetrated by any joint (61) and can accommodate all the wire bodies (62).
6. The test line seal for a gas turbine engine as set forth in claim 5, wherein: the width of the notch of the first lead wire groove (82) and the second lead wire groove (102) is larger than the diameter of the wire body (62) of any capillary metal pipe or any cable.
7. The test line seal for a gas turbine engine as set forth in claim 6, wherein: the aperture of the bottom hole of the sealing bowl (7) is d 7 The first lead hole (81) of the bottom sealing gasket (8) has a diameter d 81 The second lead hole (101) of the top sealing gasket (10) has a pore diameter d 101 Aperture d of bottom hole 7 Aperture d of first lead hole (81) 81 And the aperture d of the second lead hole (101) 101 The method comprises the steps of determining the minimum inscribed circle by a drawing method; the maximum diameter of the joints in all capillary metal pipes and cables is d 61max The maximum diameter of the wire body of all capillary metal pipes and cables is d 62max The diameter of the wire body of the rest capillary metal tube and the cable is d 62 ；
In determining the pore diameter d of the bottom hole 7 When using d 61max To diameter round, then d 62 To draw circles of diameter, each d 62 Diameter circle and d 61max To make the diameter circle tangent, a minimum inscribed circle is drawn by a drawing method to contain d 61max Is a circle of diameter and all d 62 Circle of diameter d 7 A diameter value for the minimum inscribed circle;
in determining the aperture d of the first lead hole (81) 81 And the aperture d of the second lead hole (101) 101 When using d 62max To diameter round, then d 62 To draw circles of diameter, each d 62 Diameter circle and d 62max For tangent to a circle of diameter, drawing another minimum by plottingInscribing a circle to make it contain d 62max Is a circle of diameter and all d 62 Diameter circle, aperture d of first lead hole (81) 81 And the aperture d of the second lead hole (101) 101 Is another diameter value of the minimum inscribed circle.
8. The test line seal for a gas turbine engine as set forth in claim 6, wherein: when the bottom sealing gasket (8) is propped against the hole edge of the bottom hole (71), the first lead groove (82) is overlapped on the step surface between the bottom hole (71) and the cavity hole (72), and the first lead hole (81) is intersected or tangent with the hole edge of the bottom hole (71).
9. The test line seal for a gas turbine engine as set forth in claim 6, wherein: when the top sealing gasket (10) is abutted against the hole edge of the Rong Qiangkong (72) and abutted against the outer sleeve threaded cover (5), the first lead groove (82) is attached to the inner bottom of the outer sleeve threaded cover (5), and the second lead hole (101) is intersected or tangent with the hole edge of the threading hole (51).
10. The test line seal for a gas turbine according to claim 1, wherein: the sealing soft mud adopts rubber mud (9).
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| CN202311212224.4A CN116951184B (en) | 2023-09-20 | 2023-09-20 | Test pipeline sealing structure of gas turbine |
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| CN202311212224.4A CN116951184B (en) | 2023-09-20 | 2023-09-20 | Test pipeline sealing structure of gas turbine |
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