CN118408749A - Fan casing inclusion test device and use method - Google Patents
Fan casing inclusion test device and use method Download PDFInfo
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- CN118408749A CN118408749A CN202410870908.1A CN202410870908A CN118408749A CN 118408749 A CN118408749 A CN 118408749A CN 202410870908 A CN202410870908 A CN 202410870908A CN 118408749 A CN118408749 A CN 118408749A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
- G01M15/02—Details or accessories of testing apparatus
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a fan casing inclusion test device and a use method thereof, belonging to the technical field of aeroengine test, and comprising the following steps: the upper end of the upper fixing plate is connected with a vacuum cabin cover of the vertical rotary tester, the lower end of the upper fixing plate is connected with a cylindrical connecting wall, and a fan casing test piece to be tested is arranged in the cylindrical connecting wall; the test rotor is arranged in a fan casing test piece to be tested and is connected with the vertical rotation tester; the remote control energy-gathering cutting device is connected with the test rotor; the test device and the test method provided by the invention effectively solve the problem of friction between the fan blade test piece and the fan casing test piece to be tested in the fan casing inclusion test process, simultaneously avoid repeatedly lifting the vacuum cabin cover of the vertical rotary tester in the assembly process, and effectively improve the assembly efficiency.
Description
Technical Field
The invention relates to the technical field of aeroengine testing, in particular to a fan casing inclusion test device and a use method thereof.
Background
The rotor of the aviation gas turbine engine runs at a very high rotating speed, when rotor blades are damaged or fail due to the influence of factors such as foreign object impact, low cycle fatigue, high cycle fatigue and the like in the running process, after the blades are broken and fly out, if a casing cannot contain the blades, flying high-energy broken blade fragments hit other parts of an airplane, the flying functions are lost due to light weight, and the aircraft is destroyed and the aircraft is dead due to heavy weight. Therefore, in order to ensure the reliability and safety of the operation of the aeroengine, the housing inclusion of the casing is required to be developed and researched in the development process of the aeroengine, and the engine is required to be verified through part tests and complete machine tests.
In the aspect of the test research of the housing inclusion, the current research is mainly focused on the control technology of the blade flying-off mode and the structural design of a test device. In particular, the control technology of the blade flying-break mode has been studied considerably, and the technology has been developed from the original adoption of a prefabricated notch, a combination method of the prefabricated notch and local rapid heating, a blasting method, to the mature application of a remote control energy gathering cutting technology. However, there are few studies on the structural design of the casing inclusion test apparatus, and particularly, there are few vertical structures suitable for large-diameter fan casing inclusion test apparatuses.
The existing test device for the inclusion of the large-diameter fan casing solves the problem of friction between the rotor blades and the casing by adding the lower support shaft, but has the defects of low assembly efficiency because the vacuum hatch cover needs to be repeatedly lifted and the assembly position of the support shaft is repeatedly adjusted to ensure the concentricity between the rotor and the lower support shaft; meanwhile, cameras cannot be arranged under the rotor, and a plurality of cameras are required to be circumferentially arranged at the bottom of the vacuum cabin and subjected to joint debugging, so that the test efficiency is low.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a fan casing inclusion test device, comprising: the upper end of the upper fixing plate is connected with a vacuum hatch cover of the vertical rotation tester, and a through hole for a damping device of the vertical rotation tester to pass through is formed in the upper fixing plate;
the upper end of the cylindrical connecting wall is connected with the lower end of the fixed plate, and the lower end of the cylindrical connecting wall is connected with the lower connecting plate;
The fan casing test piece to be tested is arranged on the inner side of the cylindrical connecting wall, the outer side of the fan casing test piece to be tested is connected with the inner side of the cylindrical connecting wall, and the fan casing test piece to be tested is connected with the lower end of the upper fixing plate;
the test rotor is arranged in the fan casing test piece to be tested, the upper end of the test rotor is connected with a flexible main shaft of the vertical rotary tester, the flexible main shaft is connected with the inner side of the damping device, and the lower end of the test rotor is connected with the lower connecting plate through a lower limit bearing assembly;
the remote control energy-gathering cutting device is connected with the test rotor;
The fan casing test piece testing device comprises a half-type upper cutting sleeve, a fixing plate and a fixing plate, wherein the half-type upper cutting sleeve is positioned on the inner side of a fan casing test piece to be tested, the half-type upper cutting sleeve is connected with the test rotor in a matched mode, and the upper end of the half-type upper cutting sleeve is connected with the lower end of the fixing plate.
Further, when the upper fixing plate is matched with the damping device, the concentricity requirement of the assembly is less than or equal to phi 0.012mm, and the upper fixing plate is used as a first reference of the fan casing inclusion test device during assembly.
Further, a cylinder type connecting wall connecting hole I and a cylinder type connecting wall connecting hole II are formed in the cylinder type connecting wall;
the cylindrical connecting wall connecting holes I and the cylindrical connecting wall connecting holes II are respectively positioned on the upper end face and the lower end face of the cylindrical connecting wall and are respectively and uniformly distributed with a plurality of connecting holes;
The cylindrical connecting wall is connected with the upper fixing plate and the lower connecting plate through fasteners through the cylindrical connecting wall connecting hole I and the cylindrical connecting wall connecting hole II respectively;
The perpendicularity of the upper end face and the lower end face of the cylindrical connecting wall with the radial reference surface is less than or equal to 0.005mm;
after the cylindrical connecting wall is connected with the upper fixing plate, the concentricity requirement of assembly is less than or equal to phi 0.012mm, and the cylindrical connecting wall is used as a second reference of the fan casing inclusion test device during assembly.
Further, a plurality of windows for assembling the fan casing test piece to be tested are axially arranged on the wall body of the cylindrical connecting wall, and are used for circumferentially pasting strain gauges and arranging acceleration sensors on the outer side of the fan casing test piece to be tested through the windows, and the acceleration sensors are used for acquiring strain and stress data of the fan casing test piece to be tested in the fan casing inclusion test process.
Further, a positioning groove ring II, a lower connecting plate assembly hole I, a central step hole and a lower connecting plate assembly hole II are arranged on the lower connecting plate;
The lower connecting plate is in a triangular dart structure;
the positioning groove rings II are arranged in a plurality and are respectively arranged on the upper end surfaces of the three corners of the lower connecting plate;
The plurality of lower connecting plate assembly holes I are arranged on the bottom of the positioning groove ring II respectively;
the center step hole is arranged at the center of the lower connecting plate in a penetrating way;
A plurality of lower connecting plate assembly holes II are uniformly formed along the circumference of the central step hole;
The lower connecting plate is connected with the cylindrical connecting wall through the lower connecting plate assembly hole I and the cylindrical connecting wall connection hole II by a limiting piece;
The central step hole is used for assembling and connecting a lower limit bearing assembly;
a limiting piece connected with the lower limiting bearing assembly is arranged in the lower connecting plate assembly hole II;
The positioning groove ring II is connected with the lower end of the cylindrical connecting wall in a matched mode, the assembly concentricity requirement is less than or equal to phi 0.012mm, and the positioning groove ring II is used as a third reference of the fan casing inclusion test device during assembly.
Further, the lower limit bearing assembly includes: the lower limit bearing, the bearing copper bush, the bearing pedestal, the bearing pad and the O-shaped ring;
the bearing copper bush is assembled in an inner hole of the lower limit bearing in an interference manner;
The inner hole of the bearing seat is in interference fit with the lower limit bearing, and the outer side of the bearing seat is in interference fit with the central step hole of the lower connecting plate;
the bearing pad is radially assembled on the outer side of the lower limit bearing in an interference manner, and the lower end surface of the bearing pad is in clearance fit with the bearing seat;
the O-shaped ring is assembled on the end face of the bearing pad flange;
The lower limit bearing is assembled with the test rotor in a matched mode, the radial assembly unilateral clearance is less than or equal to 2mm, and the assembly concentricity requirement is less than or equal to phi 0.05mm.
Further, the test rotor includes: the fan blade test piece, the wheel disc, the upper connecting mandrel and the lower connecting shaft;
the fan blade test piece is arranged in mortises arranged on two sides of the wheel disc;
the lower end of the upper connecting mandrel is connected with an inner hole at the upper end of the top of the wheel disc, and the upper end of the upper connecting mandrel is connected with a flexible main shaft of the vertical rotation tester;
The upper end of the lower connecting shaft is connected with an inner hole at the lower end of the bottom of the wheel disc, and the lower end of the lower connecting shaft is connected with a lower limit bearing assembly;
The remote control energy-gathering cutting device is respectively connected with the wheel disc and the lower connecting shaft.
Further, an upper fixing plate connecting hole I, a central hole, a positioning ring groove I, an upper fixing plate connecting hole II, an upper fixing plate connecting hole III and an upper fixing plate connecting Kong are formed in the upper fixing plate;
The upper fixing plate connecting holes I are formed in a plurality of positions, close to the edges of the upper fixing plate, of the upper fixing plate and are uniformly distributed;
the center hole is arranged at the center of the fixed plate;
the positioning ring grooves I are positioned between the upper fixing plate connecting hole I and the central hole, and the positioning ring grooves I are uniformly distributed in the axial direction;
the upper fixing plate connecting hole II is arranged in the positioning ring groove I and is concentric with the positioning ring groove I;
The upper fixing plate connecting hole I is used for connecting the upper fixing plate with the lower end face of the vacuum hatch cover of the vertical rotary tester;
the central hole is connected with the damping device in a matching way;
the upper fixing plate connecting hole II is arranged in the positioning ring groove I, and the cylindrical connecting wall is connected with the positioning ring groove I of the upper fixing plate through the cylindrical connecting wall connecting hole I, the limiting piece and the upper fixing plate connecting hole II;
The upper fixing plate connection Kongzhou is uniformly distributed on the lower end surface of the upper fixing plate, and the upper fixing plate connection hole III is used for connecting a fan casing test piece to be tested;
the upper fixing plate connection Kongzhou is uniformly distributed on the lower end face of the upper fixing plate and is used for connecting the half-type upper clamping sleeve, and the upper fixing plate connection Kong is axially distributed between the upper fixing plate connecting hole II and the central hole.
Further, the half-type upper ferrule includes: a half-type upper cutting sleeve assembling hole I and a half-type upper cutting sleeve assembling hole II;
The upper end face of the half-type upper clamping sleeve is connected with the lower end face of the upper fixing plate through the screw standard piece and the upper fixing plate connection Kong;
And the half-type upper clamping sleeve assembly hole II is connected with the test rotor in a matched manner.
On the other hand, the application provides a fan casing test method, which adopts a fan casing inclusion test device to test, wherein the test comprises any one of a static blasting cutting pre-test, a dynamic blasting cutting pre-test and a fan casing inclusion test under vacuum;
the test method comprises the following steps:
Step 1, assembling a fan casing test piece to be tested into the fan casing inclusion test device;
Step 2, installing an image acquisition device in the center of the bottom of the vacuum cabin which is opposite to the test rotor and is positioned below the test rotor;
Step 3, vacuumizing, loading rotating speed on the test rotor according to test requirements, and recording test data;
static blasting cutting pre-test under vacuum:
a. Assembling the test rotor, the remote control energy-gathering cutting device, the upper fixing plate and the half-type upper clamping sleeve, and installing a high-speed camera at the center of the bottom of the vacuum cabin opposite to the test rotor;
b. closing a vacuum hatch cover of the vertical rotary tester, and debugging and confirming that a detonation signal can be effectively transmitted between a signal transmitter and a wireless detonation receiver of the remote control energy-collecting cutting device;
c. Vacuumizing, opening a camera and simultaneously starting a detonation switch of the remote control energy-collecting cutting device; the video file of the detonation process of the shooting recording blade is stored;
d. after the test is finished, opening a vacuum hatch cover of the vertical rotary tester, and checking whether the pre-burst cutting length of a fan blade test piece meets the design requirement or not and whether the reserved connection part is damaged or not;
if the pre-burst cutting length of the fan blade test piece meets the design size requirement and the reserved connection part is not damaged, carrying out a dynamic burst cutting pre-test under vacuum; otherwise, repeating steps a-d;
Dynamic burst cutting pre-test under vacuum:
e. The test rotor, the remote control energy-collecting cutting device, the upper fixing plate, the half-type upper clamping sleeve, the cylindrical connecting wall, the lower connecting plate and the lower limit bearing assembly are assembled, and a high-speed camera is arranged in the center of the bottom of the vacuum cabin opposite to the test rotor;
f. repeating step b;
g. Vacuumizing, loading the rotating speed to the target rotating speed and preserving the load; opening the camera and simultaneously starting a remote control energy-collecting cutting detonation switch; recording rotation speed and vibration displacement data, and storing video files of the detonation and flying-off process of the shooting recording blade;
h. After the test is finished, opening a vacuum hatch cover of the vertical rotary tester, and checking whether a pre-detonation crack part of the test rotor breaks under the conditions of test target rotating speed and blasting cutting;
if the pre-burst cutting part of the test rotor breaks under the test target rotating speed and the burst cutting condition, carrying out a fan casing inclusion test; otherwise, redesigning the size of the pre-connection part and repeating the steps a-h;
Fan case containment test:
i. assembling the fan casing inclusion test device;
j. Uniformly distributing and pasting strain gauges on the outer side of a fan case test piece to be tested, uniformly distributing and fixing acceleration sensors, and connecting and building an acquisition system;
k. repeating step b;
vacuumizing, loading the rotating speed to the target rotating speed and preserving the load; opening the camera and simultaneously starting a remote control energy-collecting cutting detonation switch; recording rotation speed and vibration displacement data, collecting and recording strain and acceleration data, and storing video files of the detonation and flying-off process of the shooting and recording blade.
The invention has the beneficial effects that:
1. According to the test device and the test method provided by the invention, the problem of friction between the fan blade test piece and the fan casing test piece to be tested in the fan casing inclusion test process is effectively solved, and meanwhile, the vacuum cabin cover of the vertical rotary tester is prevented from being repeatedly lifted in the assembly process, and the assembly efficiency is effectively improved.
3. Through the cutting ferrule on the half that adopts, can effectively reduce the radial vibration value that flexible main shaft breaks and arouses in the test process, protection vertical rotary tester's damping device and transmission are avoided damaging, in addition, the barrel-type connecting wall of adoption, the wall body design is three window structures of circumference equipartition, be convenient for paste the foil gage and arrange acceleration sensor in the fan casing test piece outside circumference to test, the collection of fan casing strain and stress data in the test process of being convenient for, and the lower connecting plate of setting, effectively avoid test rotor when breaking and throwing away because of flexible main shaft appears in the test process, treat the fan casing test piece and cause secondary damage.
3. According to the test device and the test method provided by the invention, the vacuum explosion cutting pre-test, the dynamic explosion cutting pre-test under vacuum and the fan casing inclusion test method are adopted, so that the remote control energy-gathering cutting technology is ensured not to generate extra centrifugal load to the explosion of the fan blade test piece, and the accuracy of the fan casing inclusion test is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of 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 invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a fan case containment test apparatus provided by the present invention;
FIG. 2 is a P-view of FIG. 1 provided by the present invention;
Fig. 3 is a schematic structural view of a half-type upper ferrule provided by the invention;
FIG. 4 is a schematic view of a cylindrical connecting wall according to the present invention;
FIG. 5 is a schematic view of the structure of the lower connecting plate provided by the invention;
FIG. 6 is a schematic view of the structure of the lower limit bearing assembly provided by the present invention;
fig. 7 is a graph of rotational speed and vibration of a test rotor provided by the present invention.
Reference numerals: 1 is a fan casing test piece to be tested, 2 is a test rotor, 21 is a fan blade test piece, 22 is a wheel disc, 23 is an upper connecting mandrel, 24 is a lower connecting shaft, 25 is a locating pin, 3 is a remote control energy collecting cutting device, 31 is a cutting cable clamp assembly, 32 is a detonator clamp assembly, 33 is a booster connecting assembly, 34 is a booster assembly, 35 is a wireless detonation receiver, 36 is a signal transmitter, 4 is an upper fixing plate, 41 is an upper fixing plate connecting hole I, 42 is a central hole, 43 is a locating ring groove I, 44 is an upper fixing plate connecting hole II, 45 is an upper fixing plate connecting hole III, 46 is an upper fixing plate connecting Kong, 5 is a half-type upper clamping sleeve, 51 is a half-type upper clamping sleeve assembling hole I, 52 is a half-type upper clamping sleeve assembling hole II, 6 is a barrel-type connecting wall, 61 is a barrel-type connecting wall connecting hole I, 62 is a barrel-type connecting wall connecting hole II, 7 is a lower connecting plate, 71 is a locating groove ring II, 72 is a lower connecting plate assembling hole I, 73 is a central step hole, 74 is a lower connecting plate II, 8 is a lower bearing seat, 8 is a limit bearing, 84 is a bearing pad, and 8 is a damping pad is a bearing, and is a bearing pad is a bearing 9.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 2, a fan casing inclusion test apparatus includes: the device comprises a fan casing test piece 1 to be tested, a test rotor 2, a remote control energy-collecting cutting device 3, an upper fixing plate 4, a half-type upper clamping sleeve 5, a cylindrical connecting wall 6, a lower connecting plate 7 and a lower limit bearing assembly 8. The test rotor 2 is arranged in the fan casing test piece 1 to be tested, the upper end of the test rotor is connected with the flexible main shaft 9 of the vertical rotary tester, and the lower end of the test rotor is in clearance fit with the inner hole of the lower limit bearing assembly 8; the remote control energy-gathering cutting device 3 is fixedly connected to the test rotor 2; the upper fixing plate 4 is fixedly connected with the lower end face of the vacuum cabin cover 11 of the vertical rotary tester, and the lower end face is fixedly connected with the fan casing test piece 1 to be tested; the upper end face of the upper half-type upper clamping sleeve 5 is symmetrically and fixedly connected with the lower end face of the upper fixing plate 4, and the inner hole at the lower end of the upper half-type upper clamping sleeve is in clearance fit with the test rotor 2; the upper end face of the cylindrical connecting wall 6 is fixedly connected with the lower end face of the upper fixing plate 4, and the lower end face is fixedly connected with the lower connecting plate 7; the lower connecting plate 7 is assembled and fixed on the lower end surface of the cylindrical connecting wall 6, and the core part is assembled with the lower limit bearing assembly 8; the lower limit bearing assembly 8 is assembled and fixed in the central step hole 73 of the lower connecting plate 7, and plays a role in limiting and damping radial vibration of the test rotor 2.
The test rotor 2 includes: fan blade test piece 21, wheel disc 22, upper connection spindle 23 and lower connection spindle 24. The fan blade test piece 21 is axially symmetrically arranged in a mortise of the wheel disc 22, and the installation height of the fan blade test piece is fixed through the locating pin 25; the lower end surface of the upper connecting mandrel 23 is fixedly connected with an inner hole at the upper end of the wheel disc 22, and the upper end of the upper connecting mandrel is connected with the flexible main shaft 9 of the vertical rotation tester; the upper end surface of the lower connecting shaft 24 is fixedly connected with the inner hole of the lower end surface of the wheel disc 22.
The test rotor 2 is in clearance fit with the fan casing test piece 1 to be tested, the requirement on assembly concentricity is less than or equal to phi 0.05mm, and the unilateral clearance between the two fan blade test pieces 21 of the test rotor 2 and the inner wall of the fan casing test piece 1 to be tested is less than or equal to 1mm.
The remote control energy-gathering cutting device 3 comprises: a cutter cable clamp assembly 31, a detonator clamp assembly 32, a booster connection assembly 33, a booster assembly 34, a wireless detonation receiver 35 and a signal transmitter 36. The cutting cable clamp assembly 31 is fixedly connected to a pre-burst part of the fan blade test piece 21 through a bolt standard piece; the detonator clamp assembly 32 is fixedly connected to the fan blade test piece 21 through a bolt standard piece, and the upper end surface of the detonator clamp assembly is connected with the lower end surface of the cutting cable clamp assembly 31; the upper end of the explosion-propagation connecting assembly 33 is fixedly connected to the lower end of the fan blade test piece 21 through a bolt standard piece, the upper end face of the explosion-propagation connecting assembly is connected with the lower end face of the detonator clamp assembly 32, and the lower end of the explosion-propagation connecting assembly is embedded in the explosion-propagation assembly 34; the inner hole of the explosion-propagation assembly 34 is in clearance fit with the lower connecting shaft 24 of the test rotor 2, and the upper end surface of the explosion-propagation assembly is fixed on the inner hole of the lower end of the wheel disc 22 of the test rotor 2 through a bolt standard piece; the inner hole of the wireless detonation receiver 35 is in clearance fit with the lower connecting shaft 24 of the test rotor 2, and the upper end surface of the wireless detonation receiver is fixedly connected to the lower end surface of the explosion propagation assembly 34 through a screw standard part and is used for receiving wireless detonation signals; the signal transmitter 36 is fixed on the lower surface of the vacuum hatch cover 11, and is used for receiving a wireless detonation signal outside the vertical rotation tester and transmitting the wireless detonation signal at the same time.
The explosion-conducting assembly 34, the wireless detonation receiver 35 and the lower connecting shaft 24 of the test rotor 2 of the remote control energy-gathering cutting device 3 are radially assembled with a unilateral clearance of more than or equal to 4mm.
The upper fixing plate 4 is provided with an upper fixing plate connecting hole I41, a central hole 42, a positioning ring groove I43, an upper fixing plate connecting hole II 44, an upper fixing plate connecting hole III 45 and an upper fixing plate connecting Kong 46. The upper fixing plate connecting hole I41 is used for fixedly connecting the upper fixing plate 4 to the lower end surface of the vacuum hatch cover 11 of the vertical rotary tester; the center hole 42 is in small clearance fit with a damping device 10 used for damping the flexible main shaft 9 on the vertical rotary tester; the positioning ring groove I43 is used for axial positioning when the cylindrical connecting wall 6 is fixed; the upper fixing plate connecting holes II 44 are circumferentially and uniformly distributed in the positioning ring groove I43 and are positioned and connected with the upper end face of the cylindrical connecting wall 6; the upper fixing plate connecting holes III 45 are circumferentially and uniformly distributed on the lower end surface of the upper fixing plate 4 and are used for fixedly connecting the fan casing test piece 1 to be tested; the upper fixing plate is connected Kong and 46, is circumferentially and uniformly distributed on the lower end face of the upper fixing plate 4 and is used for fixedly connecting the half-type upper clamping sleeve 5.
The center hole 42 on the upper fixing plate 4 is matched with the damping device 10 for damping the flexible main shaft 9 on the vertical rotary tester in a small clearance fit, the concentricity of the assembly is less than or equal to phi 0.012mm, and the center hole is used as a first reference of the fan casing inclusion test device during the assembly.
As shown in fig. 3, the half-type upper ferrule 5 has a half-type upper ferrule fitting hole i 51 and a half-type upper ferrule fitting hole ii 52. The upper end face of the half-type upper clamping sleeve 5 is fixedly connected with the lower end face of the upper fixing plate 4 through the screw standard component and the upper fixing plate connection Kong; the half-type upper clamping sleeve assembly hole II 52 is in axial clearance fit with the upper connecting mandrel 23 of the test rotor 2.
The axial assembly unilateral gap between the upper half-type clamping sleeve 5 and the upper connecting mandrel 23 of the test rotor 2 is more than or equal to 2mm, and the radial vibration value of the flexible main shaft caused by fracture in the test process is reduced, so that the damping device and the transmission system of the vertical rotary tester are protected from being damaged.
As shown in fig. 4, the cylindrical connecting wall 6 has a cylindrical connecting wall connecting hole i 61 and a cylindrical connecting wall connecting hole ii 62. The cylindrical connecting wall connecting hole I61 is used for fixedly connecting the cylindrical connecting wall 6 in the positioning ring groove I43 of the upper fixing plate 4 through the bolt standard part and the upper fixing plate connecting hole II 44; the cylindrical connecting wall connecting hole II 62 is used for fixedly connecting the lower connecting plate 7.
The perpendicularity of the upper end surface and the lower end surface of the cylindrical connecting wall 6 is less than or equal to 0.005mm compared with the radial reference surface; when the cylindrical connecting wall 6 is assembled with the positioning ring groove I43 of the upper fixing plate in a small clearance fit mode, the requirement on the assembly concentricity is less than or equal to phi 0.012mm, and the cylindrical connecting wall is used as a second reference of the fan casing inclusion test device during assembly.
The cylindrical connecting wall 6 is designed into three window structures which are circumferentially and uniformly distributed at the height of the fan casing test piece 1 to be tested on the basis that the structural strength and rigidity design meets the requirements of the fan casing inclusion test, so that strain gauges are circumferentially adhered to the outer side of the fan casing test piece 1 to be tested conveniently, and an acceleration sensor is arranged for acquiring the strain and stress data of the fan casing in the test process.
As shown in fig. 5, the lower connecting plate 7 has a positioning groove ring ii 71, a lower connecting plate fitting hole i 72, a center step hole 73, and a lower connecting plate fitting hole ii 74. The positioning groove ring II 71 is in small clearance fit with the lower end face of the cylindrical connecting wall 6; the lower connecting plate assembly hole I72 is used for fixedly connecting the lower connecting plate 7 to the lower end surface of the cylindrical connecting wall 6 through a bolt standard part and the cylindrical connecting wall connection hole II 62; the central step hole 73 is used for assembling and connecting the lower limit bearing assembly 8; the lower connecting plate assembly hole II 74 is fixedly connected with the lower limit bearing assembly 8 through a screw standard part.
The positioning groove ring II 71 on the lower connecting plate 7 is assembled with the lower end of the cylindrical connecting wall 6 in a small clearance fit way, the concentricity requirement of the assembly is less than or equal to phi 0.012mm, and the positioning groove ring II 71 is used as a third reference of the fan casing inclusion test device during assembly; the center step hole 73 is in interference fit with the lower limit bearing assembly 8.
The lower connecting plate 7 can effectively avoid secondary damage to the fan casing test piece 1 to be tested when the test rotor 2 is thrown out due to the breakage of the flexible main shaft in the test.
As shown in fig. 6, the lower limit bearing assembly 8 includes: a lower limit bearing 81, a bearing copper bush 82, a bearing seat 83, a bearing pad 84 and an O-ring 85. The bearing copper bush 82 is assembled in an inner hole of the lower limit bearing 81 in an interference manner; the inner hole of the bearing seat 83 is in interference fit with the lower limit bearing 81, and the outer side of the bearing seat is in interference fit in the central step hole 73 of the lower connecting plate 7; the bearing pad 84 is radially and in interference fit with the outer circle of the lower limit bearing 81, and the lower end surface is in clearance fit with the bearing seat 83; the O-ring 85 is assembled on the flange end surface of the bearing pad 84 to perform a sealing function.
The lower limit bearing assembly 8 is assembled with the lower connecting shaft 24 of the test rotor 2 in a small clearance fit manner, the radial assembly unilateral clearance is less than or equal to 2mm, the assembly concentricity requirement is less than or equal to phi 0.05mm, and the problem of friction between the fan blade test piece 21 and the fan casing test piece 1 to be tested in the fan casing inclusion test process is effectively avoided.
The lower limit bearing assembly 8 is fixedly connected to the lower surface of the vacuum hatch 11 of the vertical rotary tester through the lower connecting plate 7, the cylindrical connecting wall 6 and the upper fixing plate 4, and the assembling concentricity between the lower limit bearing 81 and the lower connecting shaft 24 of the test rotor 2 is effectively ensured to be less than or equal to phi 0.05mm through the requirement of the first reference, the second reference and the third reference on the assembling concentricity; meanwhile, the lower limit bearing assembly 8 is fixed on the vacuum hatch 11 of the vertical rotation test, and the vacuum hatch 11 of the vertical rotation tester does not need to be lifted repeatedly in the assembly process, so that the assembly efficiency is effectively improved; meanwhile, one to two cameras are arranged at the bottom of the vacuum cabin opposite to the lower limit bearing assembly 8, so that shooting collection in the fan casing inclusion test process can be met, and the test efficiency is effectively improved.
The fan casing inclusion test method realized by the principle and the test device comprises the following specific test steps:
static blasting cutting pre-test under vacuum:
a. the test rotor 2, the remote control energy-collecting cutting device 3, the upper fixing plate 4 and the half-type upper clamping sleeve 5 are assembled, and a high-speed camera is arranged in the center of the bottom of the vacuum cabin opposite to the test rotor 2;
b. Closing the vacuum hatch 11, and debugging and confirming that the detonation signal can be effectively transmitted between the signal transmitter 36 and the wireless detonation receiver 35 of the remote control energy-collecting cutting device;
c. Vacuumizing, opening a camera and simultaneously starting a detonation switch of the remote control energy-collecting cutting device; the video file of the detonation process of the shooting recording blade is stored;
d. After the test is finished, opening the vacuum hatch cover 11, and checking whether the pre-burst cutting length of the fan blade test piece 21 meets the design requirement or not and whether the reserved connection part is damaged or not;
When the pre-burst cutting length of the fan blade test piece 21 meets the design size requirement and the reserved connection part is not damaged, carrying out a dynamic burst cutting pre-test under vacuum; otherwise, repeating steps a-d;
Dynamic burst cutting pre-test under vacuum:
e. The method comprises the steps of assembling a test rotor 2, a remote control energy-collecting cutting device 3, an upper fixing plate 4, a half-type upper clamping sleeve 5, a cylindrical connecting wall 6, a lower connecting plate 7 and a lower limit bearing assembly 8, and installing a high-speed camera in the center of the bottom of a vacuum cabin opposite to the test rotor 2;
f. repeating step b;
g. Vacuumizing, loading the rotating speed to the target rotating speed and preserving the load; opening the camera and simultaneously starting a remote control energy-collecting cutting detonation switch; recording rotation speed and vibration displacement data, and storing video files of the detonation and flying-off process of the shooting recording blade;
After the test is finished, opening the vacuum hatch cover 11, and checking whether the pre-detonation crack part of the fan blade test piece 21 breaks under the test target rotating speed+blasting cutting condition;
If the pre-burst cutting part of the fan blade test piece 21 breaks under the test target rotating speed and the burst cutting condition, carrying out a fan casing inclusion test; otherwise, redesigning the size of the pre-connection part and repeating the steps a-h;
Fan case containment test:
i. assembling the fan casing inclusion test device;
j. Uniformly distributing and adhering fixed strain gauges and uniformly distributing and fixing acceleration sensors on the outer side of a fan casing test piece 1 to be tested, and connecting and building an acquisition system;
k. repeating step b;
vacuumizing, loading the rotating speed to the target rotating speed and preserving the load; opening the camera and simultaneously starting a remote control energy-collecting cutting detonation switch; recording rotation speed and vibration displacement data, collecting and recording strain and acceleration data, and storing video files of the detonation and flying-off process of the shooting and recording blade.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A fan case containment testing apparatus, comprising:
the upper end of the upper fixing plate is connected with a vacuum hatch cover of the vertical rotation tester, and a through hole for a damping device of the vertical rotation tester to pass through is formed in the upper fixing plate;
the upper end of the cylindrical connecting wall is connected with the lower end of the fixed plate, and the lower end of the cylindrical connecting wall is connected with the lower connecting plate;
The fan casing test piece to be tested is arranged on the inner side of the cylindrical connecting wall, the outer side of the fan casing test piece to be tested is connected with the inner side of the cylindrical connecting wall, and the fan casing test piece to be tested is connected with the lower end of the upper fixing plate;
the test rotor is arranged in the fan casing test piece to be tested, the upper end of the test rotor is connected with a flexible main shaft of the vertical rotary tester, the flexible main shaft is connected with the inner side of the damping device, and the lower end of the test rotor is connected with the lower connecting plate through a lower limit bearing assembly;
the remote control energy-gathering cutting device is connected with the test rotor;
The fan casing test piece testing device comprises a half-type upper cutting sleeve, a fixing plate and a fixing plate, wherein the half-type upper cutting sleeve is positioned on the inner side of a fan casing test piece to be tested, the half-type upper cutting sleeve is connected with the test rotor in a matched mode, and the upper end of the half-type upper cutting sleeve is connected with the lower end of the fixing plate.
2. The fan casing inclusion test apparatus according to claim 1, wherein when the upper fixing plate is assembled with the damping device, the assembly concentricity is required to be less than or equal to phi 0.012mm, and the upper fixing plate is used as a first reference when the fan casing inclusion test apparatus is assembled.
3. The fan casing inclusion test device according to claim 1, wherein a cylindrical connecting wall connecting hole I and a cylindrical connecting wall connecting hole II are formed in the cylindrical connecting wall;
the cylindrical connecting wall connecting holes I and the cylindrical connecting wall connecting holes II are respectively positioned on the upper end face and the lower end face of the cylindrical connecting wall and are respectively and uniformly distributed with a plurality of connecting holes;
The cylindrical connecting wall is connected with the upper fixing plate and the lower connecting plate through fasteners through the cylindrical connecting wall connecting hole I and the cylindrical connecting wall connecting hole II respectively;
The perpendicularity of the upper end face and the lower end face of the cylindrical connecting wall with the radial reference surface is less than or equal to 0.005mm;
after the cylindrical connecting wall is connected with the upper fixing plate, the concentricity requirement of assembly is less than or equal to phi 0.012mm, and the cylindrical connecting wall is used as a second reference of the fan casing inclusion test device during assembly.
4. The fan casing inclusion test device according to claim 1, wherein a plurality of windows for assembling the fan casing test piece to be tested are axially arranged on the wall body of the cylindrical connecting wall, and are used for circumferentially adhering strain gauges and arranging acceleration sensors on the outer side of the fan casing test piece to be tested through the windows, and the acceleration sensors are used for acquiring strain and stress data of the fan casing test piece to be tested in the fan casing inclusion test process.
5. The fan case containment test apparatus according to claim 3, wherein the lower connecting plate is provided with a positioning groove ring ii, a lower connecting plate assembly hole i, a center step hole and a lower connecting plate assembly hole ii;
The lower connecting plate is in a triangular dart structure;
the positioning groove rings II are arranged in a plurality and are respectively arranged on the upper end surfaces of the three corners of the lower connecting plate;
The plurality of lower connecting plate assembly holes I are arranged on the bottom of the positioning groove ring II respectively;
the center step hole is arranged at the center of the lower connecting plate in a penetrating way;
A plurality of lower connecting plate assembly holes II are uniformly formed along the circumference of the central step hole;
The lower connecting plate is connected with the cylindrical connecting wall through the lower connecting plate assembly hole I and the cylindrical connecting wall connection hole II by a limiting piece;
The central step hole is used for assembling and connecting a lower limit bearing assembly;
a limiting piece connected with the lower limiting bearing assembly is arranged in the lower connecting plate assembly hole II;
The positioning groove ring II is connected with the lower end of the cylindrical connecting wall in a matched mode, the assembly concentricity requirement is less than or equal to phi 0.012mm, and the positioning groove ring II is used as a third reference of the fan casing inclusion test device during assembly.
6. The fan case containment test apparatus of claim 5, wherein the lower limit bearing assembly comprises: the lower limit bearing, the bearing copper bush, the bearing pedestal, the bearing pad and the O-shaped ring;
the bearing copper bush is assembled in an inner hole of the lower limit bearing in an interference manner;
The inner hole of the bearing seat is in interference fit with the lower limit bearing, and the outer side of the bearing seat is in interference fit with the central step hole of the lower connecting plate;
the bearing pad is radially assembled on the outer side of the lower limit bearing in an interference manner, and the lower end surface of the bearing pad is in clearance fit with the bearing seat;
the O-shaped ring is assembled on the end face of the bearing pad flange;
The lower limit bearing is assembled with the test rotor in a matched mode, the radial assembly unilateral clearance is less than or equal to 2mm, and the assembly concentricity requirement is less than or equal to phi 0.05mm.
7. The fan case containment test apparatus of claim 1, wherein the test rotor comprises: the fan blade test piece, the wheel disc, the upper connecting mandrel and the lower connecting shaft;
the fan blade test piece is arranged in mortises arranged on two sides of the wheel disc;
the lower end of the upper connecting mandrel is connected with an inner hole at the upper end of the top of the wheel disc, and the upper end of the upper connecting mandrel is connected with a flexible main shaft of the vertical rotation tester;
The upper end of the lower connecting shaft is connected with an inner hole at the lower end of the bottom of the wheel disc, and the lower end of the lower connecting shaft is connected with a lower limit bearing assembly;
The remote control energy-gathering cutting device is respectively connected with the wheel disc and the lower connecting shaft.
8. The fan case containment testing device according to claim 1, wherein the upper fixing plate is provided with an upper fixing plate connecting hole i, a central hole, a positioning ring groove i, an upper fixing plate connecting hole ii, an upper fixing plate connecting hole iii and an upper fixing plate connecting Kong;
The upper fixing plate connecting holes I are formed in a plurality of positions, close to the edges of the upper fixing plate, of the upper fixing plate and are uniformly distributed;
the center hole is arranged at the center of the fixed plate;
the positioning ring grooves I are positioned between the upper fixing plate connecting hole I and the central hole, and the positioning ring grooves I are uniformly distributed in the axial direction;
the upper fixing plate connecting hole II is arranged in the positioning ring groove I and is concentric with the positioning ring groove I;
The upper fixing plate connecting hole I is used for connecting the upper fixing plate with the lower end face of the vacuum hatch cover of the vertical rotary tester;
the central hole is connected with the damping device in a matching way;
the upper fixing plate connecting hole II is arranged in the positioning ring groove I, and the cylindrical connecting wall is connected with the positioning ring groove I of the upper fixing plate through the cylindrical connecting wall connecting hole I, the limiting piece and the upper fixing plate connecting hole II;
The upper fixing plate connection Kongzhou is uniformly distributed on the lower end surface of the upper fixing plate, and the upper fixing plate connection hole III is used for connecting a fan casing test piece to be tested;
the upper fixing plate connection Kongzhou is uniformly distributed on the lower end face of the upper fixing plate and is used for connecting the half-type upper clamping sleeve, and the upper fixing plate connection Kong is axially distributed between the upper fixing plate connecting hole II and the central hole.
9. The fan case containment test apparatus of claim 8, wherein the half-top ferrule comprises: a half-type upper cutting sleeve assembling hole I and a half-type upper cutting sleeve assembling hole II;
The upper end face of the half-type upper clamping sleeve is connected with the lower end face of the upper fixing plate through the screw standard piece and the upper fixing plate connection Kong;
And the half-type upper clamping sleeve assembly hole II is connected with the test rotor in a matched manner.
10. A fan casing test method, characterized in that the fan casing inclusion test device according to any one of claims 1-9 is adopted for testing, wherein the test comprises any one of a static blasting cutting pre-test, a dynamic blasting cutting pre-test and a fan casing inclusion test under vacuum;
the test method comprises the following steps:
Step 1, assembling a fan casing test piece to be tested into the fan casing inclusion test device;
Step 2, installing an image acquisition device in the center of the bottom of the vacuum cabin which is opposite to the test rotor and is positioned below the test rotor;
Step 3, vacuumizing, loading rotating speed on the test rotor according to test requirements, and recording test data;
static blasting cutting pre-test under vacuum:
a. Assembling the test rotor, the remote control energy-gathering cutting device, the upper fixing plate and the half-type upper clamping sleeve, and installing a high-speed camera at the center of the bottom of the vacuum cabin opposite to the test rotor;
b. closing a vacuum hatch cover of the vertical rotary tester, and debugging and confirming that a detonation signal can be effectively transmitted between a signal transmitter and a wireless detonation receiver of the remote control energy-collecting cutting device;
c. Vacuumizing, opening a camera and simultaneously starting a detonation switch of the remote control energy-collecting cutting device; the video file of the detonation process of the shooting recording blade is stored;
d. after the test is finished, opening a vacuum hatch cover of the vertical rotary tester, and checking whether the pre-burst cutting length of a fan blade test piece meets the design requirement or not and whether the reserved connection part is damaged or not;
if the pre-burst cutting length of the fan blade test piece meets the design size requirement and the reserved connection part is not damaged, carrying out a dynamic burst cutting pre-test under vacuum; otherwise, repeating steps a-d;
Dynamic burst cutting pre-test under vacuum:
e. The test rotor, the remote control energy-collecting cutting device, the upper fixing plate, the half-type upper clamping sleeve, the cylindrical connecting wall, the lower connecting plate and the lower limit bearing assembly are assembled, and a high-speed camera is arranged in the center of the bottom of the vacuum cabin opposite to the test rotor;
f. repeating step b;
g. Vacuumizing, loading the rotating speed to the target rotating speed and preserving the load; opening the camera and simultaneously starting a remote control energy-collecting cutting detonation switch; recording rotation speed and vibration displacement data, and storing video files of the detonation and flying-off process of the shooting recording blade;
h. After the test is finished, opening a vacuum hatch cover of the vertical rotary tester, and checking whether a pre-detonation crack part of the test rotor breaks under the conditions of test target rotating speed and blasting cutting;
if the pre-burst cutting part of the test rotor breaks under the test target rotating speed and the burst cutting condition, carrying out a fan casing inclusion test; otherwise, redesigning the size of the pre-connection part and repeating the steps a-h;
Fan case containment test:
i. assembling the fan casing inclusion test device;
j. Uniformly distributing and pasting strain gauges on the outer side of a fan case test piece to be tested, uniformly distributing and fixing acceleration sensors, and connecting and building an acquisition system;
k. repeating step b;
vacuumizing, loading the rotating speed to the target rotating speed and preserving the load; opening the camera and simultaneously starting a remote control energy-collecting cutting detonation switch; recording rotation speed and vibration displacement data, collecting and recording strain and acceleration data, and storing video files of the detonation and flying-off process of the shooting and recording blade.
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