CN115561106A - Sealing coating collision grinding testing device - Google Patents
Sealing coating collision grinding testing device Download PDFInfo
- Publication number
- CN115561106A CN115561106A CN202211229807.3A CN202211229807A CN115561106A CN 115561106 A CN115561106 A CN 115561106A CN 202211229807 A CN202211229807 A CN 202211229807A CN 115561106 A CN115561106 A CN 115561106A
- Authority
- CN
- China
- Prior art keywords
- coating
- protective cover
- fixed
- screw rod
- rod guide
- 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
- 238000000576 coating method Methods 0.000 title claims abstract description 60
- 239000011248 coating agent Substances 0.000 title claims abstract description 59
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims description 25
- 238000005299 abrasion Methods 0.000 claims description 6
- 238000009863 impact test Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- 230000009545 invasion Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007790 scraping Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
- G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A sealing coating touch-grinding testing device. The device comprises a heating device, a base, a rotating system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller; the heating device, the rotating system, the feeding system, the protection system, the data acquisition system and the sample fixing system are arranged on the base; the controller is electrically connected with the electric components in the device. The sealing coating rubbing test device provided by the invention has the following beneficial effects: the invention can truly simulate the rubbing condition of the sealing coating and the blade under the high-speed rotation under the working condition, study the rubbing force of the coating sample under different invasion depths, and measure the experimental parameters to analyze the performance of the coating. Overall structure is rationally distributed, and convenient operation can satisfy the demand of experiment.
Description
Technical Field
The invention belongs to the technical field of test systems of aero-engine tests, and particularly relates to an experimental mechanism for simulating and analyzing the impact condition of a coating on a blade.
Background
When the radial clearance of the turbine of the aircraft engine is increased, the unit oil consumption of the engine is increased; conversely, the radial spacing decreases and the turbine efficiency of the engine increases. In addition, reducing the radial clearance of the compressor can also improve the anti-surge capacity of the engine, thereby improving the flight safety. As one of the important technologies of engines, the sealing coating can improve the sealing performance between rotating and fixed parts in the aircraft gas turbine, and the performance of the engine is remarkably improved. The sealing coating is prepared on the casings of the turbine and the compressor to seal the gas channel, so that the clearance can be reduced, and the heat efficiency is improved. Sealing coatings have found widespread use in the aerospace field. The ideal sealing coating requires strong thermal stability, small friction coefficient and strong oxidation resistance, and when the sealing coating is used for sealing between the blade tip and the casing, the scraping damage can be effectively prevented while the minimum gap is kept, so that a good sealing effect is achieved.
However, in practical application, the blade and the seal coating often have a rubbing phenomenon of high-speed scraping, which can cause the blade to rub continuously and violently, and may induce more serious problems of blade fracture and rejection, rotating shaft bending, violent vibration of the whole machine, and the like. This threatens the operational safety of the engine and affects its efficiency.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a sealing coating rubbing test device.
In order to achieve the aim, the sealing coating rubbing test device provided by the invention comprises a heating device, a base, a rotating system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller;
the feeding system comprises a horizontal screw rod guide rail, a connecting piece, a fixed support, a vertical screw rod guide rail, a vertical servo motor and a horizontal servo motor; the lower end of the vertical screw rod guide rail is fixed on one side of the top surface of the base and can move up and down under the driving of a vertical servo motor; the fixed bracket is in a concave shape and horizontally arranged, and the side surface opposite to the opening is fixed on the vertical screw rod guide rail; the two horizontal lead screw guide rails are respectively arranged on the inner surfaces of two side surfaces adjacent to the opening on the fixed support and are respectively driven by a horizontal servo motor to move left and right; two ends of the connecting piece are respectively connected to the two horizontal lead screw guide rails;
the rotating system comprises a rotating shaft, a power head, a motor, a disc and blades; the output end of the motor is positioned at the lower end and is connected with the upper end of the rotating shaft through a mandrel on the power head; the shell of the power head is connected with the middle part of the connecting piece; the lower end of the rotating shaft is provided with a disc; a plurality of blades are arranged at the outer edge of the disc;
the data acquisition system comprises a mechanical sensor and a temperature sensor; wherein the mechanical sensor is arranged in the middle of the top surface of the base;
the protection system comprises a bottom plate, a left protection cover, a right protection cover and an annular baffle; the middle part of the bottom surface of the bottom plate is fixed on the mechanical sensor; the lower end of the annular baffle is fixed in the middle of the top surface of the bottom plate, a notch for arranging a coating sample is formed on the circumferential surface of one side of the annular baffle, and the position of the notch is farthest away from the position of the vertical screw rod guide rail; the left side protective cover and the right side protective cover are semicircular and are detachably mounted at the upper port of the annular baffle, a semicircular hole is formed in the circle center of each of the left side protective cover and the right side protective cover, and the two semicircular holes form a circular hole for penetrating through the rotating shaft;
the heating device is arranged on the left protective cover and used for heating the coating sample;
the sample fixing system comprises a cushion block, a pressing plate and a pressing plate bolt; the cushion block is a wedge-shaped block, and the lower end of the cushion block is fixed on the top surface of the bottom plate and is positioned at the outer side of the notch on the annular baffle; two ends of the pressure plate are respectively placed on the inclined surface of the cushion block and the upper end of the coating sample, and a bolt through hole is formed in the middle of the pressure plate; the lower end of the bolt of the pressure plate passes through the bolt through hole on the pressure plate and then is in threaded connection with the bottom plate, so that the coating sample is fixed; the temperature sensor 3 is arranged on the top surface of the bottom plate and is in contact with the outer side surface of the coating sample;
the controller is respectively and electrically connected with the mechanical sensor, the temperature sensor, the heating device, the motor, the vertical servo motor and the horizontal servo motor.
The heating device adopts a flame gun.
The mechanical sensor adopts a three-component dynamometer and is used for measuring three orthogonal components of the rubbing force generated during rubbing.
The temperature sensor is an infrared sensor and is used for measuring the temperature of the coating sample 5.
And the left protective cover and the right protective cover are connected with the ring baffle through bolts.
The controller adopts a PLC controller.
The sealing coating rubbing test device provided by the invention has the following beneficial effects: the invention can truly simulate the rubbing condition of the sealed coating under the working condition and the blade under the high-speed rotation, study the rubbing force of the coating sample under different invasion depths, and measure the experimental parameters to analyze the performance of the coating. Overall structure is rationally distributed, and convenient operation can satisfy the demand of experiment.
Drawings
FIG. 1 is a general block diagram of a seal coating rub-on test apparatus provided by the present invention.
FIG. 2 is a diagram of a protection system of a seal coating rub-impact testing apparatus provided by the present invention.
FIG. 3 is a diagram of a motor and feed system of the seal coating rub-on test apparatus provided by the present invention.
Detailed Description
The embodiments of the invention are further illustrated by the accompanying drawings and specific examples.
As shown in fig. 1 to 3, the sealing coating rubbing test device provided by the present invention comprises a heating device 8, a base 21, a rotation system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller;
the feeding system comprises a horizontal lead screw guide rail 11, a connecting piece 14, a fixed support 15, a vertical lead screw guide rail 16, a vertical servo motor and a horizontal servo motor; wherein the lower end of the vertical screw rod guide rail 16 is fixed on one side of the top surface of the base 21 and can move up and down by being driven by a vertical servo motor; the fixed bracket 15 is in a concave shape and horizontally arranged, and the side surface opposite to the opening is fixed on the vertical screw rod guide rail 16; the two horizontal screw rod guide rails 11 are respectively arranged on the inner surfaces of two side surfaces adjacent to the opening on the fixed support 15 and are respectively driven by a horizontal servo motor to move left and right; two ends of the connecting piece 14 are respectively connected to the two horizontal screw rod guide rails 11;
the rotating system comprises a rotating shaft 10, a power head 12, a motor 13, a disc 17 and blades 19; the output end of the motor 13 is positioned at the lower end and is connected with the upper end of the rotating shaft 10 through a mandrel on the power head 12; the shell of the power head 12 is connected with the middle part of the connecting piece 14; a disc 17 is arranged at the lower end of the rotating shaft 10; a plurality of blades 19 are mounted at the outer edge of the disc 17;
the data acquisition system comprises a mechanical sensor 1 and a temperature sensor 3; wherein the mechanical sensor 1 is arranged in the middle of the top surface of the base 21;
the protection system comprises a bottom plate 2, a left protective cover 9, a right protective cover 18 and a ring baffle 20; the middle part of the bottom surface of the bottom plate 2 is fixed on the mechanical sensor 1; the lower end of the annular baffle 20 is fixed in the middle of the top surface of the bottom plate 2, a notch for arranging the coating sample 5 is formed on the circumferential surface of one side, and the position of the notch is farthest away from the position of the vertical screw rod guide rail 16; the left side protecting cover 9 and the right side protecting cover 18 are both semicircular and are detachably mounted at the upper port of the annular baffle 20, a semicircular hole is formed in the circle center of each of the left side protecting cover 9 and the right side protecting cover 18, and the two semicircular holes form a circular hole for penetrating through the rotating shaft 10;
the heating device 8 is arranged on the left protective cover 9 and used for heating the coating sample 5;
the sample fixing system comprises a cushion block 4, a pressure plate 6 and a pressure plate bolt 7; the cushion block 4 is a wedge-shaped block, and the lower end of the wedge-shaped block is fixed on the top surface of the bottom plate 2 at the position outside the notch on the annular baffle plate 20; two ends of the pressing plate 6 are respectively placed on the inclined plane of the cushion block 4 and the upper end of the coating sample 5, and a bolt through hole is formed in the middle of the pressing plate; the lower end of a pressure plate bolt 7 passes through a bolt through hole on the pressure plate 6 and then is in threaded connection with the bottom plate 2, so that the coating sample 5 is fixed; the temperature sensor 3 is arranged on the top surface of the bottom plate 2 and is in contact with the outer side surface of the coating sample 5;
the controller is respectively and electrically connected with the mechanical sensor 1, the temperature sensor 3, the heating device 8, the motor 13, the vertical servo motor and the horizontal servo motor.
The heating device 8 adopts a flame gun.
The mechanical sensor 1 adopts a three-component dynamometer and is used for measuring three orthogonal components of the collision and abrasion force generated during collision and abrasion.
The temperature sensor 3 is an infrared sensor for measuring the temperature of the coating sample 5.
The left protective cover 9, the right protective cover 18 and the ring baffle 20 are connected through bolts.
The controller adopts a PLC controller.
The use method of the sealing coating rub-impact testing device provided by the invention is explained as follows:
when the sealing coating rub-on testing device provided by the invention is required to be used for coating rub-on testing, firstly, a tester takes down the left protective cover 9 and the right protective cover 18, places the coating sample 5 at the notch on the annular baffle 20, then places the two ends of the pressure plate 6 at the inclined plane of the cushion block 4 and the upper end of the coating sample 5 respectively, and then connects the lower end of the pressure plate bolt 7 to the bottom plate 2 through the bolt through hole on the pressure plate 6 and then through threads, thereby fixing the coating sample 5;
under the control of a controller, a horizontal servo motor is utilized to enable a rotating shaft 10, a motor 13, a disc 17 and blades 19 to move together to the position right above an annular baffle plate 20 through a horizontal lead screw guide rail 11, a connecting piece 14 and a power head 12; then the fixed bracket 15 together with the components connected thereto is lowered by a vertical servo motor through a vertical screw guide 16 until the center point of the blade 19 is aligned with the center point of the ring guard 20; covering the left protective cover 9 and the right protective cover 18 at the upper port of the ring-shaped baffle 20 and screwing bolts, so that a round hole formed by two semicircular holes on the left protective cover 9 and the right protective cover 18 surrounds the outer side of the lower part of the rotating shaft 10;
and then, a heating device 8 is started to heat, after the temperature sensor 3 detects that the temperature in the annular baffle 20 reaches a set temperature, a motor 13 is started to rotate the blade 19 and keep the blade at a target speed, the horizontal screw rod guide rail 11 and a part connected with the horizontal screw rod guide rail are moved to the coating sample 5 through the horizontal servo motor to enable the blade 19 to invade the coating sample 5 to generate collision and abrasion, in the process, the mechanical sensor 1 is used for detecting collision and abrasion force generated in collision and abrasion, meanwhile, the temperature sensor 3 is used for detecting the temperature of the coating sample 5 and transmitting the temperature to the controller for subsequent test and analysis. And after the test is finished, the blade 19 is retracted through the horizontal servo motor, then the device is closed, the coating sample 5 is taken down, the weight is weighed, and the surface quality of the coating is observed and analyzed.
The present invention is described in terms of embodiments, which are intended to facilitate the understanding of the methods and concepts of the present invention, and there may be variations to the specific applications of the present invention without departing from the scope of the invention, and the subject matter of the present description should not be taken as limiting the invention.
Claims (6)
1. The utility model provides a seal coating bump-grinding testing arrangement which characterized in that: the sealing coating collision and abrasion testing device comprises a heating device (8), a base (21), a rotating system, a feeding system, a protection system, a data acquisition system, a sample fixing system and a controller;
the feeding system comprises a horizontal screw rod guide rail (11), a connecting piece (14), a fixed support (15), a vertical screw rod guide rail (16), a vertical servo motor and a horizontal servo motor; wherein the lower end of the vertical screw rod guide rail (16) is fixed on one side of the top surface of the base (21) and can move up and down by being driven by a vertical servo motor; the fixed bracket (15) is in a concave shape and is horizontally arranged, and the side surface opposite to the opening is fixed on the vertical screw rod guide rail (16); the two horizontal screw rod guide rails (11) are respectively arranged on the inner surfaces of two side surfaces adjacent to the opening on the fixed support (15) and are respectively driven by a horizontal servo motor to move left and right; two ends of the connecting piece (14) are respectively connected to the two horizontal screw rod guide rails (11);
the rotating system comprises a rotating shaft (10), a power head (12), a motor (13), a disc (17) and blades (19); the output end of the motor (13) is positioned at the lower end and is connected with the upper end of the rotating shaft (10) through a mandrel on the power head (12); the shell of the power head (12) is connected with the middle part of the connecting piece (14); a disc (17) is arranged at the lower end of the rotating shaft (10); a plurality of blades (19) are arranged at the outer edge of the disc (17);
the data acquisition system comprises a mechanical sensor (1) and a temperature sensor (3); wherein the mechanical sensor (1) is arranged in the middle of the top surface of the base (21);
the protection system comprises a bottom plate (2), a left protection cover (9), a right protection cover (18) and an annular baffle (20); the middle part of the bottom surface of the bottom plate (2) is fixed on the mechanical sensor (1); the lower end of the annular baffle (20) is fixed in the middle of the top surface of the bottom plate (2), a notch for arranging a coating sample (5) is formed on the circumferential surface of one side, and the position of the notch is farthest away from the position of the vertical screw rod guide rail (16); the left side protective cover (9) and the right side protective cover (18) are both semicircular and are detachably mounted at the upper port of the annular baffle (20), a semicircular hole is formed in the circle center of each of the left side protective cover (9) and the right side protective cover (18), and the two semicircular holes form a circular hole for penetrating through the rotating shaft (10);
the heating device (8) is arranged on the left protective cover (9) and is used for heating the coating sample (5);
the sample fixing system comprises a cushion block (4), a pressure plate (6) and a pressure plate bolt (7); the cushion block (4) is a wedge-shaped block, and the lower end of the wedge-shaped block is fixed at the position, which is positioned outside the notch on the annular baffle (20), on the top surface of the bottom plate (2); two ends of the pressing plate (6) are respectively placed on the inclined surface of the cushion block (4) and the upper end of the coating sample (5), and a bolt through hole is formed in the middle of the pressing plate; the lower end of the pressure plate bolt (7) passes through the bolt through hole on the pressure plate (6) and then is in threaded connection with the bottom plate (2), so that the coating sample (5) is fixed; the temperature sensor (3) is arranged on the top surface of the bottom plate (2) and is in contact with the outer side surface of the coating sample (5);
the controller is respectively and electrically connected with the mechanical sensor (1), the temperature sensor (3), the heating device (8), the motor (13), the vertical servo motor and the horizontal servo motor.
2. The seal coating rub-impact testing device of claim 1, wherein: the heating device (8) adopts a flame gun.
3. The seal coating rub-in test device of claim 1, wherein: the mechanical sensor (1) adopts a three-component dynamometer and is used for measuring three orthogonal components of the rubbing force generated during rubbing.
4. The seal coating rub-in test device of claim 1, wherein: the temperature sensor (3) adopts an infrared sensor and is used for measuring the temperature of the coating sample (5).
5. The seal coating rub-impact testing device of claim 1, wherein: and the left protective cover (9), the right protective cover (18) and the ring baffle (20) are connected by bolts.
6. The seal coating rub-impact testing device of claim 1, wherein: the controller adopts a PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229807.3A CN115561106A (en) | 2022-10-08 | 2022-10-08 | Sealing coating collision grinding testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211229807.3A CN115561106A (en) | 2022-10-08 | 2022-10-08 | Sealing coating collision grinding testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115561106A true CN115561106A (en) | 2023-01-03 |
Family
ID=84745114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211229807.3A Pending CN115561106A (en) | 2022-10-08 | 2022-10-08 | Sealing coating collision grinding testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115561106A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129415A (en) * | 2023-10-26 | 2023-11-28 | 天津可宏振星科技有限公司 | Device and method for detecting precision of cartridge receiver sealing coating after finishing |
-
2022
- 2022-10-08 CN CN202211229807.3A patent/CN115561106A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129415A (en) * | 2023-10-26 | 2023-11-28 | 天津可宏振星科技有限公司 | Device and method for detecting precision of cartridge receiver sealing coating after finishing |
| CN117129415B (en) * | 2023-10-26 | 2024-01-12 | 天津仁爱学院 | Device and method for detecting adhesion degree of receiver sealing coating after finishing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107314893B (en) | Modularized multifunctional rotor experiment table | |
| CN109387345B (en) | Dry friction damping structure-containing simulated detuning blisk and testing device and method | |
| CN115561106A (en) | Sealing coating collision grinding testing device | |
| CN204028320U (en) | The comprehensive performance test device of DC motor rotor commutator and carbon brush | |
| CN211374068U (en) | Disc brake testing device | |
| CN100504345C (en) | Friction test machine for small sample contracting ratio table | |
| WO1991013334A1 (en) | Piston ring and liner wear simulator and method of using same | |
| CN210771094U (en) | Mounting bracket of gas detector | |
| CN201051064Y (en) | A friction tester for small sample shrinkage ratio table rack | |
| CN109916810B (en) | Dry sliding friction pair interface transient temperature simulation and test system and disc module | |
| CN215574558U (en) | Detection and evaluation device for sealed wear-resistant coating | |
| CN111638048B (en) | Simulation device for rubbing fault caused by thermal bending of multistage bladed disk rotor | |
| CN106872159B (en) | A kind of wind driven generator yaw brake system vibration noise testing stand | |
| CN111650054A (en) | Material performance testing machine system under centrifugal force-high temperature coupling environment | |
| CN115950754A (en) | High-temperature performance test bed for carrier roller detection and carrier roller detection method | |
| CN105334031B (en) | A kind of test method of dual drive electro spindle | |
| CN112903276A (en) | Open turbine blade test equipment | |
| CN205826306U (en) | A kind of polymer surface texture water lubrication tail bearing testing stand | |
| CN114813141A (en) | Multi-disc bolt connection rotor rub-impact experiment table and test method thereof | |
| CN113267561A (en) | Real-time detection device for fatigue cracks of cylinder sleeve | |
| CN110426208B (en) | High temperature strainometer mounting process reliability verification device | |
| CN211042705U (en) | Complete machine vibration testing device for micro turbojet engine | |
| CN220690653U (en) | Aircraft engine blade experimental apparatus | |
| CN109520562B (en) | Timing detection device for blade end and installation method thereof | |
| CN113267400A (en) | Horizontal pressure torsion testing device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |