CN108931349B - Centrifugal force simulation test device used in high-speed hard object impact test - Google Patents
Centrifugal force simulation test device used in high-speed hard object impact test Download PDFInfo
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- CN108931349B CN108931349B CN201810309439.0A CN201810309439A CN108931349B CN 108931349 B CN108931349 B CN 108931349B CN 201810309439 A CN201810309439 A CN 201810309439A CN 108931349 B CN108931349 B CN 108931349B
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Abstract
The invention discloses a centrifugal force simulation test device used in a high-speed hard object impact test, which comprises an adjustable supporting component, a centrifugal force loading component, a clamp and a high-speed impact test bed, wherein the adjustable supporting component comprises two clamping plates fixed on two sides of the high-speed impact test bed, three polished rod guide rails are fixed between the two clamping plates, two guide brackets are connected between the two polished rod guide rails above the high-speed impact test bed, and a bottom plate is connected between the two guide brackets; the centrifugal force loading assembly comprises a force transmission inner frame and a force bearing outer frame which are arranged on the bottom plate, and the force transmission inner frame is positioned in the force bearing outer frame; the clamp comprises an upper clamp head and a lower clamp head, each of the upper clamp head and the lower clamp head is provided with a clamp block, and a sample is arranged between the two clamp blocks. The invention realizes the simulation of the actual impact condition of the blade rotating at high speed of the aircraft engine and a hard object, and can generate more real foreign object damage.
Description
Technical Field
The invention relates to a centrifugal force simulation test device for a high-speed hard object impact test, and belongs to the field of design and maintenance of foreign object damage tolerance of an aircraft engine.
Background
Impact damage caused by the collision of hard objects such as metal, debris, gravel, stones and the like with the air flow entering the engine air flow passage and the blades rotating at high speed is one of the important reasons for aggravating fatigue failure of the blades. Although foreign object damage prevention measures such as runway foreign object sweeping, ground crew service tool inspection and control have been proposed, foreign object damage is always inevitable. For the inevitable foreign object damage problem, the blade is designed to have certain foreign object damage tolerance capability, so that the times of disassembly, maintenance and replacement of the blade after the foreign object damage occurs to a certain degree are reduced on the premise of ensuring the safety and the performance, and the economy and the readiness integrity are improved.
The design and maintenance of the foreign object damage tolerance of the aircraft engine are mainly based on two aspects of simulating real foreign object damage under laboratory conditions and evaluating the fatigue performance of materials and structures after the foreign object damage. And where how to simulate more realistic foreign object damage under laboratory conditions is a fundamental problem in this field. When a hard object collides with a rotor blade of a fan/compressor of an aircraft engine rotating at a high speed, the blade bears a huge centrifugal force load.
Disclosure of Invention
The invention aims to provide a centrifugal force simulation test device used in a high-speed hard object impact test, so as to realize the purpose of simulating the actual impact condition of a blade rotating at a high speed of an aircraft engine and a hard object and generating more real foreign object damage.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a simulation centrifugal force test device for among high-speed hard thing impact test, includes adjustable supporting component, centrifugal force loading subassembly, anchor clamps, high-speed impact test platform, wherein:
the adjustable supporting assembly comprises two adjustable clamping plates fixed on two sides of the high-speed impact test bed, three polished rod guide rails are fixed between the two adjustable clamping plates, two polished rod guide rails are positioned above the high-speed impact test bed and are positioned on the same horizontal plane, and the other polished rod guide rail is positioned below the high-speed impact test bed; two guide brackets are connected between the two polished rod guide rails above the high-speed impact test bed, and a bottom plate is connected between the two guide brackets;
the centrifugal force loading assembly comprises a force transmission inner frame and a force bearing outer frame which are arranged on a bottom plate, the force transmission inner frame is positioned in the force bearing outer frame, the force transmission inner frame comprises an upper force transmission plate and a lower force transmission plate, and the upper force transmission plate and the lower force transmission plate are connected through four force transmission vertical rods; the bearing outer frame comprises four lower supporting columns connected with the bottom plate, the upper ends of the four lower supporting columns are connected with a bearing middle plate, the bearing middle plate is connected with four upper supporting columns, and the upper ends of the four upper supporting columns are connected with a bearing top plate; a hydraulic actuator cylinder is arranged between the lower force transmission plate and the force bearing middle plate and is connected with a hydraulic oil pump through a hydraulic oil pipe; a tension and pressure sensor is fixed on the upper force transmission plate and is connected with a tension and pressure digital display meter outside the centrifugal force loading assembly through a lead;
the clamp comprises an upper clamp and a lower clamp, the upper clamp is fixed at the bottom of the bearing top plate, the lower clamp is fixed on the tension pressure sensor, and the upper clamp and the lower clamp correspond up and down; and the upper chuck and the lower chuck are respectively provided with a clamping block, and a sample is arranged between the two clamping blocks.
The adjustable clamping plate is L-shaped, a positioning bolt is arranged at the bottom of the adjustable clamping plate, the positioning bolt is in threaded connection with the bottom of the adjustable clamping plate and penetrates through the bottom of the adjustable clamping plate, and the end part of the positioning bolt is propped against the bottom of the high-speed impact test bed; a manual screw rod is arranged on one of the adjustable clamping plates, penetrates through the adjustable clamping plate, and the end part of the manual screw rod abuts against a guide support close to the adjustable clamping plate.
The two ends of the polished rod guide rail are provided with studs, and the polished rod guide rail is fixed between the two adjustable clamping plates through the studs and nuts.
The two guide brackets are connected with the bottom plate through bolts.
The end of the force transmission vertical rod is provided with threads, and the four force transmission vertical rods are connected with the upper force transmission plate and the lower force transmission plate through the threads.
The lower end of the lower strut is provided with a stud, and the upper end of the lower strut is provided with a threaded hole; the upper end and the lower end of the upper strut are provided with studs; the stud at the lower end of the lower support is in threaded connection with the bottom plate, the upper end of the lower support is in threaded connection with the stud at the lower end of the upper support through a threaded hole, and the force bearing middle plate is fixed between the lower support and the upper support; the stud at the upper end of the upper support is in threaded connection with the bearing top plate (3) and is fixed through a nut.
The tension and pressure sensor is fixed on an upper force transmission plate of the force transmission inner frame through a plurality of screws.
The bottom of the lower chuck is provided with a stud, and the lower chuck is in threaded connection with the pull pressure sensor through the stud; the top of the upper chuck is provided with a stud, and the upper chuck is connected with a force bearing top plate through the stud and is fixed through a top nut.
A circle of 72 positioning grooves with 5 degrees at intervals are arranged around the central hole on the upper surface of the bearing top plate; the double-screw bolt of the upper chuck is provided with a chuck, and the lower surface of the chuck is provided with a radial boss matched with the positioning groove.
The lower chuck and the upper chuck are both U-shaped grooves, and trapezoidal holes are correspondingly formed in two side surfaces of the U-shaped grooves; the clamping block is inserted between the two holes, and two ends of the clamping block are trapezoidal; the center of the clamping block is provided with a through hole, and the clamping blocks in the lower chuck and the upper chuck are fixed with a sample provided with a pin hole through the through hole and a pin bolt.
Has the advantages that: the invention has the advantages that:
(1) the device provides an effective simulation centrifugal force test device for the high-speed hard object impact test. And manual hydraulic power is adopted, so that the operation is convenient and labor-saving, and any pulling force within 50KN can be provided. The tension sensor and the digital display meter are configured, so that the current tension value can be conveniently and quickly acquired.
(2) The invention has simple and compact structure, is convenient for position adjustment on a high-speed impact test bed, and can avoid designing a protective cover with overlarge volume. Aiming at the characteristic that the sample is thin in thickness, the pin and clamping block combined clamp is adopted, so that the sample is prevented from being damaged at the pin hole position in the test, and a complex compression structure caused by independently adopting the clamping block type clamp is avoided.
(3) The change of the four degrees of freedom of the sample relative to the light gas gun barrel outlet can be realized. The polished rod guide rail is arranged to realize the movement of the sample relative to the left and right directions of the gun barrel outlet, the positioning bolt and the chuck can realize the up and down movement of the sample relative to the gun barrel outlet, the adjustable clamping plate can realize the forward and backward movement of the test relative to the gun barrel outlet, and the chuck and the upper chuck can limit the sample to move at different angles relative to the gun barrel outlet.
Drawings
FIG. 1 is a schematic structural diagram of a test device for simulating centrifugal force in a high-speed hard object impact test according to the present invention;
fig. 2 is a structural schematic diagram of a bearing top plate;
FIG. 3 is a schematic structural view of a clamping block;
FIG. 4 is a schematic structural view of the upper chuck;
FIG. 5 is a schematic structural view of the lower chuck;
FIG. 6 is a schematic structural view of a sample;
FIG. 7 is a schematic view of the chuck configuration;
FIG. 8 is an enlarged view of a portion A of FIG. 7;
in the figure, 1-top nut, 2-chuck, 3-bearing top plate, 4-upper support column, 5-bearing middle plate, 6-lower support column, 7-bottom plate, 8-upper force transmission plate, 9-force transmission vertical rod, 10-lower force transmission plate, 11-upper chuck, 12-clamping block, 13-lower chuck, 14-pin bolt, 15-first nut, 16-guide bracket, 17-polished rod guide rail, 18-bolt, 19-adjustable clamping plate, 20-positioning bolt, 21-second nut, 22-manual screw rod, 23-hydraulic oil pump, 24-sample, 25-pulling pressure sensor, 26-pulling pressure digital indicator, 27-lead, 28-hydraulic oil pipe, 29-hydraulic actuating cylinder, 30-gun barrel bracket, 31-high-speed impact test bed, 32-light-gas gun barrel, 33-ballistic trajectory, 34-positioning groove, 35-pin hole, 36-hole, 37-through hole, 38-radial boss and 39-marked line.
Detailed Description
The invention is further explained below with reference to the drawings.
As shown in FIG. 1, the centrifugal force simulation test device for high-speed hard object impact test of the present invention comprises an adjustable supporting component, a centrifugal force loading component, a clamp, and a high-speed impact test bed 31, wherein:
a gun barrel bracket 30 is arranged on the high-speed impact test bed 31, and a light gas gun barrel 32 is arranged on the gun barrel bracket 30;
the adjustable supporting component is used for adjusting the relative position of the centrifugal force loading component and the outlet of the light gas cannon barrel 32; the adjustable supporting assembly comprises two adjustable clamping plates 19 fixed on two sides of the high-speed impact test bed 31, three polished rod guide rails 17 are fixed between the two adjustable clamping plates 19, wherein the two polished rod guide rails 17 are positioned above the high-speed impact test bed 31 and are positioned on the same horizontal plane, the other polished rod guide rail 17 is positioned below the high-speed impact test bed 31, two ends of each polished rod guide rail 17 are provided with studs, and the polished rod guide rails 17 are fixed between the two adjustable clamping plates 19 through the studs and second nuts 21; two guide brackets 16 are connected between the two polished rod guide rails 17 above the high-speed impact test bed 31 through bolts 18, a bottom plate 7 is connected between the two guide brackets 16, and the two polished rod guide rails 17 above the high-speed impact test bed 31 are matched with the guide brackets 16 to realize the left and right movement of the test sample 24 relative to the trajectory 33; the adjustable clamping plates 19 are fastened on two sides of the high-speed impact test bed 31, so that the front-back distance of the sample 24 relative to the outlet of the light gas gun barrel 32 can be changed; the adjustable clamping plate 19 is L-shaped, a positioning bolt 20 is arranged at the bottom of the adjustable clamping plate, the positioning bolt 20 is in threaded connection with the bottom of the adjustable clamping plate 19 and penetrates through the bottom of the adjustable clamping plate 19, the end part of the positioning bolt 20 is abutted against the bottom of the high-speed impact test bed 31, and the height of the centrifugal force loading assembly can be changed by rotating the positioning bolt 20 so as to realize that the test sample 24 moves up and down relative to the trajectory 33. A manual screw rod 22 is arranged on one of the adjustable clamping plates 19, the manual screw rod 22 penetrates through the adjustable clamping plate 19, the end part of the manual screw rod 22 is abutted against the guide bracket 16 close to the adjustable clamping plate 19, and the manual screw rod 22 is used for adjusting the left and right positions of the clamp relative to the light gas gun barrel 32.
The centrifugal force loading assembly is used for simulating the centrifugal force load borne by the fan/compressor blade of the aircraft engine when the fan/compressor blade is impacted by a hard object. The centrifugal force loading assembly comprises a force transmission inner frame and a force bearing outer frame which are arranged on the bottom plate 7, the force transmission inner frame is positioned in the force bearing outer frame, the force transmission inner frame comprises an upper force transmission plate 8, a lower force transmission plate 10 and four force transmission upright rods 9, threads are arranged at the end parts of the force transmission upright rods 9, and the four force transmission upright rods 9 are connected with the upper force transmission plate 8 and the lower force transmission plate 10 through the threads; the bearing outer frame comprises four lower struts 6 connected with a bottom plate 7, four upper struts 4 and a bearing top plate 3, wherein the lower ends of the lower struts 6 are provided with studs, the upper ends of the lower struts are provided with threaded holes, the upper ends and the lower ends of the upper struts 4 are provided with studs, the studs at the lower ends of the lower struts 6 are in threaded connection with the bottom plate 7, the upper ends of the lower struts are in threaded connection with the studs at the lower ends of the upper struts 4 through the threaded holes, and meanwhile, the bearing middle plate 5 is fixed between the lower struts 6 and the upper struts 4; the stud at the upper end of the upper support 4 is in threaded connection with the force bearing top plate 3 and is fixed through a nut. A hydraulic actuator cylinder 29 is arranged between the lower dowel plate 10 and the force bearing middle plate 5, and the hydraulic actuator cylinder 29 is connected with a hydraulic oil pump 23 through a hydraulic oil pipe 28; the upper force transmission plate 8 is fixed with a tension and pressure sensor 25 through eight screws, and the tension and pressure sensor 25 is connected with a tension and pressure digital display meter 26 outside the centrifugal force loading assembly through a lead 27.
The clamp comprises an upper clamp 11 and a lower clamp 13, the upper clamp 11 is fixed at the bottom of the bearing top plate 3, the lower clamp 13 is fixed on the tension pressure sensor 25, and the upper clamp 11 corresponds to the lower clamp 13 up and down; each of the upper chuck 11 and the lower chuck 13 is provided with a clamping block 12, and a sample 24 is arranged between the two clamping blocks 12. The bottom of the lower chuck 13 is provided with a stud, and the stud is in threaded connection with a pull pressure sensor 25; the top of the upper chuck 11 is provided with a stud, and is connected with the force bearing top plate 3 through the stud and fixed through a top nut 1.
As shown in fig. 2, a circle of 72 positioning grooves 34 spaced 5 degrees are arranged around the central hole of the upper surface of the bearing top plate 3.
The upper jaw 11 is provided with a chuck 2 on the stud, as shown in fig. 7 and 8, the lower surface of the chuck 2 is provided with radial bosses 38 and with index marks 39, the bosses 38 cooperate with the positioning recesses 34 to define the relative angle of the test specimen 24 and the ballistic trajectory 33 by rotating the chuck 2 and rotating the upper jaw 11.
As shown in fig. 4 and 5, the lower chuck 13 and the upper chuck 11 are both a U-shaped groove, and two side surfaces thereof are correspondingly provided with trapezoidal holes 36; the clamping block 12 is inserted between the two holes 36, and two ends of the clamping block 12 are trapezoidal; the center of the clamping block 12 is provided with a through hole 37, and the clamping block 12 in the lower clamp 13 and the upper clamp 11 is fixed with the sample 24 provided with a pin hole 35 through the through hole 37 and the pin bolt 14, as shown in fig. 6. The pin bolt 14 and the first nut 15 provide a certain pre-clamping force on the test piece 24.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The utility model provides a be arranged in high-speed hard thing impact test simulation centrifugal force test device which characterized in that: including adjustable supporting component, centrifugal force loading subassembly, anchor clamps, high-speed impact test platform (31), wherein:
the adjustable supporting assembly comprises two adjustable clamping plates (19) fixed on two sides of a high-speed impact test bed (31), three polished rod guide rails (17) are fixed between the two adjustable clamping plates (19), wherein the two polished rod guide rails (17) are positioned above the high-speed impact test bed (31) and are positioned on the same horizontal plane, the other polished rod guide rail (17) is positioned below the high-speed impact test bed (31), studs are arranged at two ends of each polished rod guide rail (17), and the polished rod guide rails (17) are fixed between the two adjustable clamping plates (19) through the studs and nuts; two guide brackets (16) are connected between two polished rod guide rails (17) above the high-speed impact test bed (31), a bottom plate (7) is connected between the two guide brackets (16), and the two guide brackets (16) are connected with the bottom plate (7) through bolts (18); the adjustable clamping plate (19) is L-shaped, a positioning bolt (20) is arranged at the bottom of the adjustable clamping plate, the positioning bolt (20) is in threaded connection with the bottom of the adjustable clamping plate (19) and penetrates through the bottom of the adjustable clamping plate (19), and the end part of the positioning bolt is propped against the bottom of the high-speed impact test bed (31); a manual screw rod (22) is arranged on one adjustable clamping plate (19), the manual screw rod (22) penetrates through the adjustable clamping plate (19), and the end part of the manual screw rod is propped against a guide bracket (16) close to the adjustable clamping plate (19);
the centrifugal force loading assembly comprises a force transmission inner frame and a force bearing outer frame which are arranged on a bottom plate (7), the force transmission inner frame is positioned in the force bearing outer frame, the force transmission inner frame comprises an upper force transmission plate (8) and a lower force transmission plate (10), the upper force transmission plate (8) is connected with the lower force transmission plate (10) through four force transmission upright rods (9), threads are arranged at the end parts of the force transmission upright rods (9), and the four force transmission upright rods (9) are connected with the upper force transmission plate (8) and the lower force transmission plate (10) through the threads; the bearing outer frame comprises four lower supporting columns (6) connected with a bottom plate (7), the upper ends of the four lower supporting columns (6) are connected with a bearing middle plate (5), the bearing middle plate (5) is connected with four upper supporting columns (4), the upper ends of the four upper supporting columns (4) are connected with a bearing top plate (3), the lower ends of the lower supporting columns (6) are provided with studs, and the upper ends of the lower supporting columns are provided with threaded holes; the upper end and the lower end of the upper strut (4) are provided with studs; the stud at the lower end of the lower support (6) is in threaded connection with the bottom plate (7), the upper end of the lower support is in threaded connection with the stud at the lower end of the upper support (4) through a threaded hole, and the bearing middle plate (5) is fixed between the lower support (6) and the upper support (4); the stud at the upper end of the upper strut (4) is in threaded connection with the bearing top plate (3) and is fixed through a nut; a hydraulic actuator cylinder (29) is arranged between the lower dowel plate (10) and the force bearing middle plate (5), and the hydraulic actuator cylinder (29) is connected with a hydraulic oil pump (23) through a hydraulic oil pipe (28); a tension and pressure sensor (25) is fixed on the upper force transmission plate (8), and the tension and pressure sensor (25) is connected with a tension and pressure digital display meter (26) positioned outside the centrifugal force loading assembly through a lead (27); the tension and pressure sensor (25) is fixed on an upper force transmission plate (8) of the force transmission inner frame through a plurality of screws;
the clamp comprises an upper clamp (11) and a lower clamp (13), the upper clamp (11) is fixed at the bottom of the bearing top plate (3), the lower clamp (13) is fixed on the tension pressure sensor (25), and the upper clamp (11) and the lower clamp (13) correspond up and down; the upper chuck (11) and the lower chuck (13) are respectively provided with a clamping block (12), and a sample (24) is arranged between the two clamping blocks (12); the bottom of the lower chuck (13) is provided with a stud, and the stud is in threaded connection with a pull pressure sensor (25); the top of the upper chuck (11) is provided with a stud, and the upper chuck is connected with the force bearing top plate (3) through the stud and is fixed through a top nut (1); a circle of 72 positioning grooves (34) with 5 degrees are arranged around the central hole of the upper surface of the bearing top plate (3); a chuck (2) is arranged on a stud of the upper chuck (11), and a radial boss (38) matched with the positioning groove (34) is arranged on the lower surface of the chuck (2); the lower chuck (13) and the upper chuck (11) are both U-shaped grooves, and trapezoidal holes (36) are correspondingly formed in two side surfaces of the U-shaped grooves; the clamping block (12) is inserted between the two holes (36), and two ends of the clamping block (12) are trapezoidal; the center of the clamping block (12) is provided with a through hole (37), and the clamping block (12) in the lower chuck (13) and the upper chuck (11) is fixed with a sample (24) with a pin hole through the through hole (37) and a pin bolt (14).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810309439.0A CN108931349B (en) | 2018-04-09 | 2018-04-09 | Centrifugal force simulation test device used in high-speed hard object impact test |
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| CN201810309439.0A CN108931349B (en) | 2018-04-09 | 2018-04-09 | Centrifugal force simulation test device used in high-speed hard object impact test |
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| CN108931349B true CN108931349B (en) | 2020-08-18 |
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| CN110435924A (en) * | 2019-08-09 | 2019-11-12 | 中国航发沈阳发动机研究所 | Blade of aviation engine bird impact tests simulate fixture |
| CN113109185B (en) * | 2021-03-02 | 2022-10-21 | 南京航空航天大学 | High-temperature service environment simulation device for high-speed hard object impact test |
| CN116164924B (en) * | 2023-04-24 | 2023-07-28 | 山东海鲲数控设备有限公司 | Shock resistance testing device for machine tool protective cover |
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