CN115585073A - Testing device for dynamic sealing performance of metal elastic sealing structure - Google Patents
Testing device for dynamic sealing performance of metal elastic sealing structure Download PDFInfo
- Publication number
- CN115585073A CN115585073A CN202211054646.9A CN202211054646A CN115585073A CN 115585073 A CN115585073 A CN 115585073A CN 202211054646 A CN202211054646 A CN 202211054646A CN 115585073 A CN115585073 A CN 115585073A
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- expansion
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- 238000007789 sealing Methods 0.000 title claims abstract description 78
- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000001141 propulsive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 18
- 238000005452 bending Methods 0.000 description 10
- 230000007246 mechanism Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/78—Other construction of jet pipes
- F02K1/82—Jet pipe walls, e.g. liners
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- 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
Abstract
The test device for the dynamic sealing performance of the metal elastic sealing structure at least partially solves the problem that the structure in the prior art can only be tested in a static environment. Including driving motor, the closed area and the flow measurement device that a plurality of boards are constituteed, closed area has set gradually convergence regulating plate, keysets and expansion regulating piece and has installed support, slide bar assembly along the central line direction, and convergence regulating plate, keysets and expansion regulating plate divide into the air current district with closed area and let out the leakage zone, convergence regulating plate, expansion regulating plate have super-elasticity combination sealing strip with the articulated position embedding of closed area, control driving motor's working parameter, the relative position between adjustment convergence regulating plate, keysets and the expansion regulating plate, when different pressure value air currents get into the air current district, pass through the flow measurement device tests the flow change of letting out the leakage zone to the sealing performance of different model super-elasticity combination sealing strip of test and L type sealing strip improves the propulsive efficiency of spray tube.
Description
Technical Field
The invention belongs to the technical field of aero-engine exhaust systems, and particularly relates to a test device for dynamic sealing performance of a metal elastic sealing structure.
Background
In recent years, the development of aircraft weaponry has been progressing toward both attack and defense, stealth, unmanned, and the like, and demands for weight reduction, stealth shielding, and the like have been made on the structure of an engine rear nozzle member. The binary vector spray pipe has the advantages of simple vector motion mechanism, good invisibility, benefit for integrated design with a rear engine body and the like, is favored by various countries, but a large number of large-size thin-wall sheet metal structures adopted by the binary vector spray pipe are very easy to deform under high temperature, large pressure gradient and large load, particularly when the airplane is maneuvering and engine state is adjusted, the characteristic section of the spray pipe needs to be adjusted, and quick relative motion is generated among components of the spray pipe, so that high-pressure cooling gas and high-temperature and high-pressure gas can leak outwards from a structural gap, the performance of the whole engine is reduced, and the high-temperature gas leakage can erode various load-bearing components, and the service life and the use safety of the whole engine and components are seriously threatened.
The traditional scheme is that a metal elastic sealing sheet is adopted to seal the clearance position formed by each rotating part and each deformation part, the elastic compensation capability of the sealing sheet and the reliability of the structure of the sealing sheet under the high-temperature and high-pressure environment are mutually exclusive, the sealing sheet can only be tested under the static environment, a large number of tests are needed to obtain the balance point, and the sealing structure fails in the process of developing related similar engines at home and abroad, so that the related cases and the experience training of the structure failure caused by high-temperature gas leakage are realized.
The characteristic dimension of the metal elastic sealing structure is very small relative to the dimension of a wide flow passage, and has magnitude difference, and the magnitude difference exists between the leakage at the sealing position and the main flow gas flow, so that the idea of obtaining the sealing characteristic by the traditional complete machine test is difficult to realize. Therefore, a test device which can adapt to high temperature, high pressure and wide range of motion sealing structure and can realize dynamic control and collection and measurement of leaked gas is urgently needed to meet the dynamic sealing performance test requirement of the metal elastic sealing structure.
Disclosure of Invention
In view of this, the present invention provides a device for testing dynamic sealing performance of a metal elastic sealing structure, which at least partially solves the problem that the structure in the prior art can only be tested in a static environment.
The utility model provides a test device of metal elastic sealing structure dynamic sealing performance, is connected with the round square casing that changes, including driving motor, the closed area and the flow measurement device that a plurality of boards are constituteed, closed area has set gradually convergence regulating plate, keysets and expansion regulating plate along the central line direction to install support, slide bar subassembly, connecting rod, convergence regulating plate, keysets and expansion regulating plate divide into the air current district with closed area and let out the leakage area, wherein:
the circular-to-square casing is communicated with the closed area along the direction of the central line of the closed area, and high-pressure air enters the closed area through the circular-to-square casing;
two ends of the adapter plate are respectively hinged with one ends of the convergence adjusting plate and the expansion adjusting plate, and the other ends of the convergence adjusting plate and the expansion adjusting plate are respectively hinged with the front mounting plate and the rear mounting plate;
the driving motor is connected with one end of the driving rod through a coupler, and the other end of the driving rod extends into one side surface in the direction of a non-central line of the closed area and is connected with an eccentric wheel; the eccentric wheel is arranged in the sliding rod assembly and intermittently pushes the sliding rod assembly to move along the horizontal direction;
the bracket is used for supporting the sliding rod assembly, and two ends of the sliding rod assembly freely penetrate through the bracket along the horizontal direction; one end of the bracket is fixedly arranged on the left side plate through a bolt; one end of the sliding rod component is hinged with the convergence adjusting plate through a connecting rod;
a super-elastic combined sealing sheet is embedded in the hinged position of the convergence adjusting plate, the expansion adjusting plate and the closed area; l-shaped sealing pieces are embedded in the hinged positions of the two ends of the adapter plate and the convergence adjusting plate and the expansion adjusting plate respectively;
the flow measuring device is installed at the top of the closed area and is partially embedded to control working parameters of the driving motor, adjust relative alignment among the convergence adjusting plate, the adapter plate and the expansion adjusting plate, and when airflow with different pressure values enters the airflow area, the flow measuring device tests flow change of a leakage area to test the sealing performance of different types of superelasticity combination sealing plates and L-shaped sealing plates.
The invention has the technical beneficial effects that:
the dynamic sealing performance test device for the metal elastic sealing structure driven by the motor is innovatively designed, the motion control law of the adjusting plate is simulated through a group of eccentric wheel mechanisms, and leaked gas is collected and measured through the closed gas collecting cavity, so that the sealing characteristic of the metal elastic sealing structure in the full-envelope range is obtained, and the problems that the sealing performance of the metal elastic sealing sheet is difficult to measure and the motion control is complex are solved. The motion of an engine spray pipe adjusting plate is simulated through the structure of a set of three adjusting plates, and the collection and measurement of leakage gas of a moving component sealing structure are realized by matching with a fixed wall surface, so that the problem of sealing performance test in the motion process of the engine spray pipe is solved, the change of main flow pneumatic parameters in the exhaust expansion process of the Laval spray pipe of the engine can be simulated, and the work simulation of the sealing structure in the real spray pipe working environment is realized; the eccentric wheel mechanism realizes adjustment of the adjusting plate, solves the problem of driving of the movement mechanism in a closed space, and can realize replacement of sealing structures with different schemes through quick replacement, so that verification of sealing performance of different sealing structures is realized, the configuration of a real engine spray pipe is simulated more, and simultaneous verification of multiple sealing structures can be realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective view of the present invention;
fig. 2 is a front cross-sectional view of the present invention.
FIG. 3 is a schematic view of a slide bar assembly of the present invention. .
Wherein:
1. a round-to-square casing; 2. an upper fixing plate; 3. a right side plate; 4. a coupling; 5. a drive motor; 6. a motor bracket; 7. a support; 8. a left side plate; 9. a rear mounting plate; 9a, a front mounting plate; 10. a superelastic composite sealing piece; 11. expanding the adjusting plate; 12. an L-shaped sealing sheet; 13. an adapter plate; 14. a convergence adjusting plate; 15. a drive rod; 16. an eccentric wheel; 17. a slide bar assembly; 18. a connecting rod; 19. a flat nozzle; 20. a base plate; 71. a first support bar; 72. a second support bar; 171. a frame; 172. a first movable bar; 173. a second travel bar.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure of the present disclosure. It is to be understood that the embodiments described are only a few embodiments of the present disclosure, and not all embodiments. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
The test device for the dynamic sealing performance of the metal elastic sealing structure shown in fig. 1 is connected with a circular-to-square casing 1, so that the test device is closer to the actual working condition. As shown in fig. 2, it includes driving motor 5, the closed area and the flow measurement device that a plurality of boards are constituteed, closed area has set gradually convergence regulating plate 14 along the central line direction, adapter plate 13 and expansion adjustment piece 11 and install support 7, slide bar subassembly 17, connecting rod 18, convergence regulating plate 14, adapter plate 13 and expansion adjustment divide into the air current district or leak the area with closed area, regard the mode direction of fig. 2 as the reference, the leak the area at convergence regulating plate 14, the upper region of adapter plate 13 and expansion adjustment piece 11, the air current district is in the lower region, during the experiment, convergence regulating plate 14, adapter plate 13, expansion adjustment plate 11 constitute three-stage regulating plate structure, be used for simulating the motion of engine regulating plate spray tube, and cooperate the fixed wall to realize the collection and the measurement of motion component seal structure leakage gas, wherein:
the circular-to-square casing 1 is communicated with the closed area along the direction of the central line of the closed area, and high-pressure air enters the closed area through the circular-to-square casing 1;
two ends of the adapter plate 13 are respectively hinged with one ends of the convergence adjusting plate 14 and the expansion adjusting sheet 11, and the other ends of the convergence adjusting plate 14 and the expansion adjusting sheet 11 are respectively hinged with the front mounting plate 9 and the rear mounting plate 9 a;
the driving motor 5 is connected with one end of a driving rod 15 through a coupling 4, and the other end of the driving rod 15 extends into one side surface in the direction of a non-central line of the closed area and is connected with an eccentric wheel 16; the eccentric wheel 16 is arranged in the sliding rod component 17, the sliding rod component 17 is intermittently pushed to move along the horizontal direction, and the driving motor 5 is arranged on the motor bracket 6;
the bracket 7 is used for supporting the sliding rod assembly 17, and two ends of the sliding rod assembly 17 freely penetrate through the bracket 7 along the horizontal direction; one end of the sliding rod component 17 is hinged with the convergence adjusting plate 14 through a connecting rod 18;
a super-elastic combined sealing sheet 10 is embedded in the hinged position of the convergence adjusting plate 14, the expansion adjusting plate 11 and the closed area; the two ends of the adapter plate 13 are respectively embedded with the L-shaped sealing pieces 12 at the hinged positions of the convergence adjusting plate 14 and the expansion adjusting plate 11;
the flow measuring device is installed at the top of the closed area and is partially embedded, working parameters of the driving motor 5 are controlled, relative alignment among the convergence adjusting plate 14, the adapter plate 13 and the expansion adjusting plate 11 is adjusted, and when airflow with different pressure values enters the airflow area, flow change of the leakage area is tested through the flow measuring device, so that the sealing performance of different types of superelastic combination sealing plates 10 and L-shaped sealing plates 12 is tested. The structure of the scheme is used for carrying out a sealing test under a dynamic environment and can adapt to the sealing performance of different types of superelasticity combined sealing pieces 10 and L-shaped sealing pieces 12.
As a specific embodiment provided in the present application, the closed area is formed by sealing an upper fixing plate 2, a lower fixing plate, a left side plate 8, a right side plate 3, a front mounting plate 9a and a rear mounting plate 9, wherein:
one end of the convergence adjusting plate 14 is hinged with the inner wall surface of the front mounting plate 9a, and one end of the expansion adjusting plate 11 is hinged with the inner wall surface of the rear mounting plate 9;
the bracket 7 is fixed on the inner wall surface of the left side plate 8, the circular-square casing 1 is connected with the front mounting plate 9a in a communicating manner, the flow measuring device is mounted on the upper fixing plate 2, for example, a flat nozzle 19 is arranged at the central area of the upper fixing plate 2, and the flat nozzle 19 is provided with the flow measuring device to measure the pressure of a leakage area.
As an embodiment provided by the present disclosure, as shown in fig. 3, the sliding rod assembly 17 includes a frame 171, a first moving rod 172 and a second moving rod, the eccentric wheel 16 is wrapped by the frame 171, and the frame 171 is intermittently pushed by the eccentric wheel 16, wherein:
both sides of the frame 171 are respectively connected to one ends of the first and second moving bars 172 and 172, and the other ends of the first and second moving bars 172 and 172 are connected to freely pass through the bracket 7.
As an embodiment provided in the present disclosure, the bracket 7 is two support rods, and the two support rods are fixed on the inner wall surface of the left side plate 8, the first moving rod 172 passes through one support rod 71, and the second moving rod 173 passes through the other support rod 72. The two support rods are connected to the first and second movable rods 172 and 173, respectively, in a hole axis manner.
The overall working principle is as follows:
the convergence adjusting plate 14, the adapting plate 13 and the expansion adjusting plate 11 are movable parts; the front end of a convergence adjusting plate 14 is hinged on the circular-square casing 1, the convergence adjusting plate 14, a switching plate 13 and an expansion adjusting plate 11 are sequentially hinged, and the other end of the expansion adjusting plate 11 is hinged on a rear mounting plate 9 to form the upper boundary of a gas channel; the right side plate 3, the left side plate 8 and the bottom plate 20 constitute the other 3-sided boundaries of the gas channel, respectively. Superelasticity combination sealing plates 10 are uniformly arranged between the circular rotating square casing 1 and the convergence adjusting plate 14 and between the rear mounting plate 9 and the expansion adjusting plate 11, and L-shaped sealing plates 12 are arranged between the adapter plate 13 and the convergence adjusting plate 14 and between the adapter plate 13 and the expansion adjusting plate 11 so as to make up a gas leakage channel formed by design gaps among parts, thermal deformation of the parts and the like and reduce leakage of gas at the position.
The leakage gas collection cavity is composed of an upper fixing plate 2, a convergence adjusting plate 14, a transfer plate 13 and an expansion adjusting plate 11, is mainly used for collecting gas leaked from a gas channel and is connected with a flowmeter through a flat nozzle 19, so that the leakage gas flow is obtained, and the sealing characteristic of the metal elastic sealing structure in each state is calculated.
The motion mechanism is composed of a driving motor 5, a bracket 7, a driving rod 15, an eccentric wheel 16, a sliding rod component 17 and a connecting rod 18. The driving motor 5 is connected with the driving rod 15 through a coupler 4; the driving rod 15 is arranged on the right side plate 3 and the left side plate 8 and is meshed with the eccentric wheel 16 through a gear to transmit the torque of the motor; the sliding rod assembly 17 is installed on the support 7 and is in contact fit with the eccentric wheel 16, and the movement of the eccentric wheel 16 drives the sliding rod assembly 17 to move along the axial direction, so that the connecting rod 18 and the convergence adjusting plate 14 are driven to follow up, and the control and adjustment of a fuel gas flow channel are realized. During unsteady state control, the motor drives the eccentric wheel mechanism to move, the convergence adjusting plate 14 can do reciprocating swing around the hinge point of the convergence adjusting plate and the outlet position of the circular rotating square casing 1 according to a given movement rule, so that the adapter plate 13 and the expansion adjusting plate 11 are driven to move, the change of the geometric dimension of the gas flow channel structure is realized, and the requirements of different drop-pressure ratio pneumatic parameters are met. Wherein, the eccentric position and radius of the eccentric wheel are related to the size of the connecting rod and the swing angle of the convergence adjusting plate; the whole movement mechanism is simple in structure and high in control precision.
The superelasticity combination sealing piece 10 and the L-shaped sealing piece 12 are both made of a deformable high-temperature alloy material and are installed on a main body part through bolts, and quick replacement can be realized through replacement, so that the sealing characteristics under different structures are obtained. The wall thickness, the structural bending form, the bending radius and the compression amount between the sealing sheet and the part to be sealed of the super-elastic combined sealing sheet 10 and the L-shaped sealing sheet 12 are design parameters, and the recommended wall thickness is 0.3-1.5; the structure bending form comprises a C-shaped bending form, an E-shaped bending form and the like, and the preferred bending form of the invention is the C-shaped bending; the bending radius can be different according to different bending forms, and the preferred bending radius of the invention is R2-R8; the compression between the sealing plate and the sealed part is determined according to the ambient temperature and the pressure difference of the sealing position, and is usually 0-2mm, and the preferred compression of the invention is 1mm.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (5)
1. The utility model provides a test device of metal elastic sealing structure dynamic sealing performance, is connected with the round square casing that changes, its characterized in that, including driving motor, the closed area and the flow measuring device that a plurality of boards are constituteed, closed area has set gradually convergence regulating plate, keysets and expansion regulating plate along the central line direction to install support, slide bar component, connecting rod, convergence regulating plate, keysets and expansion regulating plate divide into the air current district with closed area and let out the leakage area, wherein:
the circular-to-square casing is communicated with the closed area along the direction of the central line of the closed area, and high-pressure air enters the closed area through the circular-to-square casing;
two ends of the adapter plate are respectively hinged with one ends of the convergence adjusting plate and the expansion adjusting plate, and the other ends of the convergence adjusting plate and the expansion adjusting plate are respectively hinged with the front mounting plate and the rear mounting plate;
the driving motor is connected with one end of the driving rod through a coupler, and the other end of the driving rod extends into one side surface in the direction of a non-central line of the closed area and is connected with an eccentric wheel; the eccentric wheel is arranged in the sliding rod assembly and intermittently pushes the sliding rod assembly to move along the horizontal direction;
the bracket is used for supporting the sliding rod assembly, and two ends of the sliding rod assembly freely penetrate through the bracket along the horizontal direction; one end of the bracket is fixedly arranged on the left side plate through a bolt; one end of the sliding rod component is hinged with the convergence adjusting plate through a connecting rod;
a super-elastic combined sealing sheet is embedded in the hinged position of the convergence adjusting plate, the expansion adjusting plate and the closed area; l-shaped sealing pieces are embedded in the hinged positions of the two ends of the adapter plate and the convergence adjusting plate and the expansion adjusting plate respectively;
the flow measuring device is installed at the top of the closed area and partially embedded to control working parameters of the driving motor, adjust the relative alignment among the convergence adjusting plate, the adapter plate and the expansion adjusting plate, and when airflow with different pressure values enters an airflow area, the flow measuring device tests the flow change of a leakage area so as to test the sealing performance of the superelasticity combined sealing pieces and the L-shaped sealing pieces with different models.
2. The test device of claim 1, wherein the enclosed area is sealed by an upper mounting plate, a lower mounting plate, a left side plate, a right side plate, a front mounting plate, and a rear mounting plate, wherein:
one end of the convergence adjusting plate is hinged with the inner wall surface of the front mounting plate, and one end of the expansion adjusting plate is hinged with the inner wall surface of the rear mounting plate;
the support is fixed on the inner wall surface of the left side plate, and the round square casing is connected with the front mounting plate in a communicating mode.
3. The testing device of claim 2, wherein the slide bar assembly comprises a frame, a first travel bar and a second travel bar, the eccentric being wrapped by the frame, the frame being intermittently urged by the eccentric, wherein:
and two sides of the frame are respectively connected with one ends of the first moving rod and the second moving rod, and the other ends of the first moving rod and the second moving rod are connected and freely penetrate through the support.
4. The testing apparatus according to claim 3, wherein the support is two support rods, the two support rods are fixed on the inner wall surface of the left side plate, the first moving rod passes through one support rod, and the second moving rod passes through the other support rod.
5. The testing device according to claim 3, wherein the two support rods are connected to the first and second movable rods in a manner of a hole axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211054646.9A CN115585073B (en) | 2022-08-31 | 2022-08-31 | Test device for dynamic sealing performance of metal elastic sealing structure |
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| CN202211054646.9A CN115585073B (en) | 2022-08-31 | 2022-08-31 | Test device for dynamic sealing performance of metal elastic sealing structure |
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| CN115585073B CN115585073B (en) | 2024-04-16 |
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