CN111780957B - Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine - Google Patents
Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine Download PDFInfo
- Publication number
- CN111780957B CN111780957B CN202010629043.1A CN202010629043A CN111780957B CN 111780957 B CN111780957 B CN 111780957B CN 202010629043 A CN202010629043 A CN 202010629043A CN 111780957 B CN111780957 B CN 111780957B
- Authority
- CN
- China
- Prior art keywords
- fixed
- fixing
- hydraulic cylinder
- block
- piece
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 104
- 230000003068 static effect Effects 0.000 title claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000008093 supporting effect Effects 0.000 claims description 84
- 238000007789 sealing Methods 0.000 claims description 81
- 230000007246 mechanism Effects 0.000 claims description 32
- 210000000078 claw Anatomy 0.000 claims description 26
- 238000013001 point bending Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 13
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 238000004026 adhesive bonding Methods 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 7
- 239000000696 magnetic material Substances 0.000 claims description 7
- 239000005341 toughened glass Substances 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 230000006837 decompression Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 3
- 230000005284 excitation Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000011056 performance test Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000010349 pulsation Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- 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
- G01M7/02—Vibration-testing by means of a shake table
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- 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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
-
- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- 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
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The invention belongs to the technical field of pipeline test platforms, and particularly relates to a test platform for testing static and dynamic mechanical properties of an L-shaped pipeline of an aero-engine. All parts can cooperate with each other to simulate complex working conditions, and the properties under the complex working conditions are obtained. The test platform provided by the invention has wide application range and can be used for testing L-shaped pipelines with different sizes; the test working condition can be controlled, and the influence of the outside is small; the effect of simulating the actual environment, particularly the dynamic load environment, is good when multiple performance tests are carried out simultaneously; simple structure and convenient maintenance.
Description
Technical Field
The invention belongs to the technical field of pipeline test platforms, and particularly relates to a test platform for testing static and dynamic mechanical properties of an L-shaped pipeline of an aircraft engine.
Background
The aircraft engine has various types and complex structures, and generally plays roles in transporting fuel, providing oil pressure and the like for the engine. Among them, the "L" type pipe of the aircraft engine is widely used because of its convenience in direction adjustment, easy support and layout optimization. Then, due to the complexity and variability of the working conditions of the aircraft engine, for example, the severe environments such as vibration and impact not only easily cause the problems of exceeding vibration and large deformation of various pipelines, but also easily cause the problems of crack damage, fatigue damage and the like, and in a severe case, fuel leakage can be caused, so that the power performance of the whole engine is paralyzed, and further a major safety accident is caused. Therefore, before pipeline installation and application, it is necessary to develop a dedicated test platform to detect and evaluate various mechanical properties of the pipeline, including strength, rigidity, vibration resistance, impact resistance, and the like, so as to objectively evaluate and judge whether static mechanical properties and dynamic mechanical properties of straight pipes, U-shaped pipes, L-shaped pipes or other pipelines of different types meet the standards.
At present, most of domestic and overseas tests are carried out aiming at the single mechanical property of pipelines, and some special test platforms are reported. For example, patent CN104879348A discloses a hydraulic pipeline vibration test simulation test platform, which can perform vibration test and data collection on a pipeline; the document 'development of a transient pressure pulsation test platform of a hydraulic pipeline' researches and develops a transient pressure pulsation test platform aiming at a pipeline, so that pressure fluctuation in the pipeline can be effectively simulated and detected; the document "stress test of hydraulic system pipeline and data analysis application thereof" introduces a specific process of bonding a strain gauge, and can carry out stress test on the hydraulic system pipeline; the patent CN209878243U designs a pressure testing device for a ship fuel oil adding pipeline, which can realize simple pressure testing; patent CN107515150A has designed an experimental apparatus to marine pipeline carries out mechanical properties test, but can only draw to ordinary straight tube type pipeline, press, bending test, do not consider the complicated influence that dynamic load such as vibration, impact caused, do not consider simultaneously that clamping tool can lead to pipeline crushing deformation to produce not because the damage of test, influence the test result, in addition, four-point bending test device wherein is line contact, not the point contact, influence the data result, only the collection and the analysis of the relevant data of meeting an emergency among the data acquisition analytical equipment in addition, do not receive the force, data acquisition and analysis in the aspect of action process etc., and the overall configuration is complicated, do not benefit to popularization and application. Patent CN107575437A has designed an aviation hydraulic pump and hydraulic line capability test laboratory bench, but can only carry out the test to the straight tube vibration, temperature, pressure, does not consider the mechanical impact collision, the influence in the aspect of loads such as four-point bending, and lack protection device, have certain potential safety hazard. Patent CN207408064U designs a pipeline reliability testing device, but the testing device can only perform pulsating pressure, temperature and vibration tests on straight pipe type pipelines, does not consider the influence of pulling, pressing, bending, impact and the like, and is not enough to simulate complex working conditions. In summary, the above design usually can only perform a single or a small amount of dynamic and static mechanical property tests, and cannot effectively simulate the complex load environment of the pipeline, the test evaluation index is not comprehensive, and the test platform and means are undoubtedly limited. In addition, the performance test and device for the pipeline are only for common straight pipe type pipelines, complex pipeline configurations are not considered, and relevant experimental devices, clamps and the like cannot meet the urgent requirements of static and dynamic mechanical performance tests of U-shaped pipes, L-shaped pipes or other heterogeneous pipelines.
In addition, in order to more accurately evaluate the mechanical properties of various types of pipelines, people also purposefully carry out collection research on various mechanical data of the pipelines, for example, a vibration measuring device of a refrigeration system pipeline is designed in patent CN110779612A, and can collect and analyze vibration parameters of the pipelines; the patent CN209878129U designs an embedded type aviation hydraulic pipeline multi-parameter test acquisition and analysis device, which can acquire and analyze acceleration, displacement, temperature and strain data of a pipeline; the document "airplane pipeline vibration test research" carries out detailed research on the pipeline vibration signal processing mode, and provides a method capable of effectively obtaining vibration signal parameters. However, none of the above reports relate to a specific test experimental device design, and only the collection and analysis of test data can be achieved.
To sum up, the vast majority of existing patents are to the test platform of straight tube, do not have the static and dynamic mechanical properties test platform to L type pipeline, can not simulate the complicated changeable operating mode of aviation environment, can't satisfy the test demand of aeroengine to the pipeline.
Disclosure of Invention
In order to solve the technical problems, the invention provides a test platform for testing static and dynamic mechanical properties of an L-shaped pipeline of an aircraft engine.
The specific technical scheme is as follows:
the test platform for testing the static and dynamic mechanical properties of the L-shaped pipeline of the aircraft engine comprises a tensile structure, a dynamic loading structure, a sealing structure, a multipoint vibration structure, a temperature gradient heating device, a measuring mechanism, a supporting platform and a safety protection structure; the stretching structures are positioned at two ends of the straight pipe of the L-shaped pipe and fixed on the supporting platform; the power loading structure moves and is fixed right above the L-shaped pipe; the sealing structures are positioned at two ends of the L-shaped pipeline, one part of the sealing structures is inserted into the L-shaped pipeline, and the other part of the sealing structures is provided with a hoop and can be fixed on the L-shaped pipeline by utilizing the hoop; the measuring mechanism and the multipoint vibration structure can flexibly change positions, are placed around the L-shaped pipeline and can test the inner side part of the L-shaped pipeline elbow, the multipoint vibration structure comprises a plurality of vibration sources, and the plurality of vibration sources are arranged around the L-shaped pipeline to realize multipoint vibration excitation on the L-shaped pipeline; the temperature gradient heating device is fixed on the L-shaped pipe, and the test interval can be adjusted; the safety protection structure is located outside the integral platform and connected with the supporting platform through bolts.
The stretching structure comprises a first hydraulic cylinder, a second hydraulic cylinder, a hydraulic cylinder fixing block, a hydraulic cylinder slideway, a first V-shaped clamp, a second V-shaped clamp, a clamp slideway, a lower clamp hydraulic cylinder, an upper clamp hydraulic cylinder, a clamp fixing block, a fastening screw, an anti-crushing device, a first pressure sensing group, a sliding fixing block and a sliding base body;
the internal fixing device and the connection mode of the stretching structure are as follows: the first V-shaped clamp is fixed with the first pressure sensing group through a screw and is fixed to the clamp slideway through a screw; the clamp slideway can slide on a platform slide rail of the safety protection structure and is close to the fastening screw at a required position to be fixed; the lower clamp hydraulic cylinder is fixed with the second V-shaped clamp; the upper clamp hydraulic cylinder is fixed with the clamp fixing block;
the fixing device for the two-end stretching hydraulic cylinder of the stretching structure and the connection mode are as follows: the first hydraulic cylinder is fixed on the hydraulic cylinder slideway by virtue of a hydraulic cylinder fixing block; the sliding fixing block and the sliding base body are used for fixing the second hydraulic cylinder and can slide on a hydraulic cylinder slide rail; the hydraulic cylinder slideway is fixed on the supporting platform through a bolt; the front end external thread end threads of the first hydraulic cylinder and the second hydraulic cylinder are respectively connected with the internal threads of the first V-shaped clamp and the second V-shaped clamp of the internal fixing device;
an anti-crushing device is arranged on the inner side of the pipeline, and the anti-crushing structure consists of a hinge top part, a bottom hinge base, a top hinge base, a sliding chute, a first hinge connecting part, a second hinge connecting part, a first supporting rod, a second supporting rod, a third supporting rod, a fourth supporting rod, an intermediate reinforcing part, an intermediate reinforcing fixing part, a hollow threaded rod, a top hinge upper part, a hydraulic cylinder, a supporting rod and a second pressure sensing group; the whole structure is fixed by the contraction of a hydraulic cylinder, and the hydraulic cylinder passes through the second pressure sensing group and is connected with the hollow threaded rod; supporting rods are arranged on two sides of the hollow threaded rod; the bottom hinge base is connected with the hinge top part through screws, and is clamped with three first supporting rods which are uniformly distributed in the circumferential direction, and a hollow threaded rod penetrates through the two supporting rods; the first hinge connecting piece is connected with the first supporting rod and the second supporting rod, and the second supporting rod is clamped and fixed by the middle reinforcing fixing piece and the middle reinforcing piece; the middle reinforcing fixing piece, the middle reinforcing piece and the hinge top piece are connected through screws, are penetrated through by a hollow threaded rod, and clamp a third supporting rod at the other end; the third supporting rod is connected with the fourth supporting rod through a second hinge connecting piece; the fourth supporting rod is clamped by the top end hinge base and the top end hinge upper part, and the top end hinge base, the top end hinge upper part and the hollow threaded rod are connected through screws; the sliding chute is arranged outside the structure, limits the radial degree of freedom by virtue of a first hinge connecting piece and a second hinge connecting piece, is connected with the bottom hinge base and the upper part of the top hinge by virtue of a spring and is always positioned in the central position;
the second pressure sensing group comprises four second pressure sensors, a cover plate, a base, a locking screw and a locking nut; placing four second pressure sensors inside the base; the locking screw is used for pre-tightening and fixing the second pressure sensor, a locking nut is used for forming double-thread self-locking to prevent loosening, and the cover plate is placed at the top of the second pressure sensor and connected with the supporting rod;
the first pressure sensing group consists of four first pressure sensors, a top cover, a base body, a pre-tightening screw, a pre-tightening nut and a hexagonal piece; placing four first pressure sensors on the upper part of the base body; the pre-tightening screw pre-tightens and fixes the first pressure sensor, and a pre-tightening nut forms double-thread self-locking to prevent loosening; the hexagonal piece is placed at the lower part of the base body and is fixed with the top cover through countersunk screws.
The dynamic loading structure consists of a four-point bending structure, a mechanical impact collision structure and a dynamic structure;
the power structure consists of a motor, a differential mechanism, a gear, a power base top cover, a wheel, a steering bearing fixing block, a steering bearing, a front bearing fixing piece, a front bearing, a pressurizing spring, a pressurizing block, a lower bearing blocking piece and a lower bearing; the motor is connected with the gear, and the gear is meshed with the differential; the motor, the gear and the differential are fixed by the power base and the power base top cover; the differential is connected with the wheels; the power base is connected with the steering bearing fixing block; the steering bearing fixing block is fixed with a fixing piece of a four-point bending structure, and the middle of the steering bearing fixing block is connected with a steering bearing; the front bearing is connected with the power base through a front bearing fixing piece; the pressurizing spring, the power base and the pressurizing block are welded together, and the lower bearing is connected with the pressurizing block through the lower bearing blocking piece;
the four-point bending structure is fixed through a screw and a power structure; the power structure moves and is fixed on the protective structure; the mechanical impact collision structure is fixed with the four-point bending structure; the four-point bending structure comprises a bending hydraulic cylinder, a fixing piece, a hydraulic cylinder fixing cylinder, a pressure block fixing piece, a pressure block chute, a fastening knob, a pressure block and a supporting structure; the bending hydraulic cylinder is fixed by the hydraulic cylinder fixing cylinder and the fixing piece; the fixing piece is connected with a steering bearing fixing block of the power structure; the pressure block fixing piece and the pressure block sliding groove fix the pressure block; the pressure block fixing piece is fixed with the front end of the bending hydraulic cylinder through threads; the fastening knob can adjust and fix the position of the pressure block in the pressure block sliding groove; the supporting structure is arranged on a platform slide rail of the safety protection structure and can be fixed at a position;
the mechanical impact collision structure comprises an impact fixing seat, an impact hydraulic cylinder, a hydraulic cylinder fixing part, a magnet, an electromagnet fixing sleeve, an electromagnet connecting block, an electromagnet, a propelling block, a claw sleeve, a claw, an impact block, a punch, a guide rod, a linear bearing, a small switch, a small battery, an energy storage spring, a first pressure sensor, a set screw and a set nut; the upper end of the impact fixing seat is fixedly connected with a fixing piece of a four-point bending structure; the impact hydraulic cylinder is fixed through the impact fixing seat and the hydraulic cylinder fixing piece; the inner groove of the hydraulic cylinder fixing piece is used for fixing the linear bearing, the first pressure sensor can be placed in the inner groove of the hydraulic cylinder fixing piece and is pre-tightened and fixed through the set screw, and double-thread self-locking is formed between the first pressure sensor and the set screw and a set nut, so that loosening is prevented; the linear bearing is connected with the guide rod and used for limiting the track of the guide rod; the front end of the guide rod is connected with the impact block by threads, and an energy storage spring is sleeved on the guide rod; the thread at the front end of the impact hydraulic cylinder is connected with the electromagnet connecting block; the electromagnet is arranged in the electromagnet fixing sleeve, and the electromagnet fixing sleeve is connected with the claw sleeve through a screw; the electromagnet connecting block is fixed with the electromagnet through a screw; the pushing block is placed in the claw sleeve, the magnet is placed in the claw in an interference manner, and the whole body is placed in the claw sleeve; the small switch is arranged at the bottom of the claw sleeve and is connected with the claw sleeve through a screw; the small battery is welded with the small switch to provide a power supply; the punch head is connected with the impact block through threads, and the angle can be finely adjusted; the supporting structure is connected with the platform sliding rail of the safety protection structure and can adjust the position.
The sealing structure comprises an O-shaped sealing ring, a Y-shaped sealing ring deformation piece, an L-shaped decompression piece, a high-pressure sealing ring, a sealing base, a sealing hoop and a beryllium copper sealing ring; a beryllium copper sealing ring is placed at the bottom of the outer layer of the cylinder inside the sealing base; a Y-shaped sealing ring deformation piece is placed on the beryllium copper sealing ring; an L-shaped pressure reducing piece is placed at the bottom of the inner layer of the cylinder in the sealing base body; a high-pressure sealing ring is arranged on the L-shaped sealing decompression piece; an O-shaped sealing ring is arranged in the high-pressure sealing ring; the sealing hoop is arranged outside the sealing base; the whole sealing structure is integrally formed by pressure.
The multipoint vibration structure comprises a small vibration exciter, a fixed base body, a permanent magnet, a magnetic core, a soft magnetic material, a limiting block, an arc block, a vibration exciter fixing piece, a force arm extending piece, a force arm fixing block, a first clamp knob, a second clamp knob and a third clamp knob; the soft magnetic materials are connected at the lower end of the fixed base body through threads; the permanent magnet is placed in the magnetic core, the arc block fills the vacancy and is placed in the fixed base body, and the limiting block limits the axial position of the magnetic core and is connected to the fixed base body through threads; the force arm fixing block is adjusted and fixed at the position on the fixed base body through a first clamp knob; the force arm extension piece is adjusted and fixed with the position of the force arm fixing block through a second clamp knob to form a fixing clamp; the vibration exciter fixing piece passes through the third clamp knob and the force arm extending piece, and the relative position of the vibration exciter fixing piece and the force arm extending piece can be adjusted; the small vibration exciter is clamped and fixed through the thread tensioning effect of the vibration exciter fixing piece.
The temperature gradient heating device comprises a thermistor, a heating resistor, a cooling liquid conveying pipe, a thermistor fixing block, a cooling pipe fixing block, two-end supports, an internal support, two-end heat insulation, a heat insulation shell, a hinge group, a thread gluing, a buckle and a fixing knob;
the two end supports are respectively positioned at two ends, the two internal supports are positioned in the middle, and the two internal supports are fixedly connected in the heat insulation shell through threads to form a module base body; the cooling liquid conveying pipe is fixed on the module base body through the cooling pipe fixing block in a threaded connection mode; the thermistor is fixed on the substrate through the thermistor fixing block by threaded connection; the heating resistor is directly fixed on the substrate by screw thread connection; the two ends of the module are insulated and fixed on the two end supports through threads to form a module half part; the temperature gradient heating device is composed of two identical module halves; the half parts are connected by a hinge group; the thread gluing is fixed on the half part through threads to form a space which can be opened and closed; the size of the opening is controlled by a string and a buckle for heat insulation at two ends; the whole body is fixed on the pipeline through a fixed knob.
The measuring mechanism comprises a measuring mechanism and a corresponding fixing clamp; the measuring mechanism comprises a high-speed camera, a laser displacement sensor, a strain gauge and a thermistor; the corresponding fixing clamp fixes the measuring mechanism and then integrally fixes the measuring mechanism at the required position of the supporting platform.
The safety protection structure comprises a support, a stand column, a top cover, a platform slide rail, a slide way and toughened glass; the support is fixed with the supporting platform through screws, and the upright posts are fixed with the support to form a main body frame; the top cover is fixed above the bracket; the platform slide rail is fixed at the middle position of the supporting platform through a screw; the slideway is fixed on the peripheral edge of the supporting platform, and the sliding toughened glass is arranged in the slideway.
Compared with the prior art, the invention has the following beneficial technical effects:
the test platform for testing the static and dynamic mechanical properties of the L-shaped pipeline of the aero-engine is mainly used for testing the properties of the L-shaped pipeline. The tensile structure is subjected to a tensile test, and the tensile test is a test method for determining the material characteristics of the pipeline under the axial tensile load; the power loading structure comprises a power structure, a four-point bending structure and a mechanical impact collision structure, wherein the power structure is used for controlling the four-point bending structure and the mechanical impact collision structure to move to a specified position, the four-point bending structure can test the bending performance of a pipeline, and the mechanical impact collision structure can test the performance of the pipeline under the condition that the mechanical impact collision is suddenly applied to the outside; the sealing structure is used for carrying out an internal pressure test and a pressure pulsation test, the internal pressure test is used for testing the maximum internal pressure which can be borne by the pipeline and determining the pipeline characteristics under a certain internal pressure condition, and the pressure pulsation test is used for testing the performance of the pipeline under a pulsating hydraulic condition; the multipoint vibration structure is used for carrying out multipoint vibration test, and the multipoint vibration test is a performance test of the test pipeline under the condition of being excited at multiple places; the temperature gradient heating device is used for carrying out temperature gradient test, and the temperature gradient test is a performance test under the condition that the inner and outer diameter temperatures are different; the measuring mechanism aims at detecting the change of the test data at any time; the purpose of the safety protection structure is to protect workers. Meanwhile, all parts can cooperate with each other to simulate complex working conditions, and the properties under the complex working conditions are obtained. The test platform provided by the invention has wide application range and can be used for testing various different pipelines; the variable can be controlled, and the influence of the outside is small; the effect of simulating the actual environment is good when multiple performance tests are carried out simultaneously; simple structure and convenient maintenance.
Drawings
FIG. 1 is a schematic diagram of the overall three-dimensional structure of the test platform of the present invention;
FIG. 2 is a schematic overall perspective view of the stretching structure of the present invention;
FIG. 3 is a schematic view of the internal fixation device of the stretching structure of the present invention;
FIG. 4 is a schematic perspective view of a fixing device for two-end stretching hydraulic cylinders of the stretching structure of the present invention (the hydraulic cylinder fixing block is cut away);
FIG. 5 is a schematic view of an anti-collapse device for a stretching structure according to the present invention;
FIG. 6 is a schematic view of the stretching structure showing the opening state of the collapse prevention structure according to the present invention;
FIG. 7 is a schematic structural view of a second pressure sensing group of the stretching structure of the present invention (cover plate cut);
FIG. 8 is a schematic structural view (with a cutaway top cover) of a first pressure sensing group of the stretching structure of the present invention;
FIG. 9 is a schematic structural view of the upper portion of a four-point bend structure according to the present invention;
FIG. 10 is a schematic structural view of a support structure of the present invention;
FIG. 11 is a schematic structural view (with a cutaway top cover of the power base) of the power structure of the present invention;
FIG. 12 is a schematic mechanical diagram (with the hydraulic cylinder mount cut away) of the mechanical impact collision structure of the present invention;
FIG. 13 is a schematic view showing the internal structure of the mechanical impact collision structure of the present invention;
FIG. 14 is a schematic perspective view of a seal according to the present invention;
FIG. 15 is a schematic structural view of a seal structure of the present invention;
FIG. 16 is a schematic view of a measuring mechanism of the present invention;
FIG. 17 is a schematic structural diagram of a multi-point vibrating structure according to the present invention;
FIG. 18 is a structural diagram of a fixing jig of the multi-point vibration structure according to the present invention;
FIG. 19 is a schematic structural view of a module half part of the temperature gradient heating apparatus of the present invention (with the heat insulating housing cut away);
fig. 20 is a perspective view of the safety protection structure of the present invention.
In the figure, 1-upper clamp hydraulic cylinder, 2-first V-shaped clamp, 3-clamp fixed block, 4-second V-shaped clamp, 5-lower clamp hydraulic cylinder, 6-clamp slideway, 7-fastening screw, 8-hydraulic cylinder fixed block, 9-first hydraulic cylinder, 10-slide fixed block, 11-second hydraulic cylinder, 12-slide base, 13-hydraulic cylinder slideway, 14-hydraulic cylinder, 15-support rod, 16-bottom hinge base, 17-hinge top part, 18-first support rod, 19-second support rod, 20-first hinge connecting part, 21-middle reinforcement fixed part, 22-middle reinforcement part, 23-third support rod, 24-chute, 25-top hinge base, 26-top hinge upper part, 27-hollow threaded rod, 28-second hinge connecting piece, 29-fourth supporting rod, 30-cover plate, 31-base, 32-second pressure sensor, 33-locking nut, 34-locking screw, 35-top cover, 36-hexagonal piece, 37-base body, 38-first pressure sensor, 39-pre-tightening nut, 40-pre-tightening screw, 41-fixing piece, 42-hydraulic cylinder fixing barrel, 43-pressure block fixing piece, 44-bending hydraulic cylinder, 45-fastening knob, 46-pressure block, 47-pressure block chute, 48-lower bearing baffle plate, 49-lower bearing, 50-pressurizing block, 51-pressurizing spring, 52-wheel, 53-front bearing fixing piece, 54-front bearing, 55-power base top cover, 56-a differential, 57-a gear, 58-a motor, 59-a steering bearing fixing block, 60-a steering bearing, 61-a power base, 62-a punch, 63-an impact block, 64-an energy storage spring, 65-an impact hydraulic cylinder, 66-a guide rod, 67-a set screw, 68-a set nut, 69-a hydraulic cylinder fixing piece, 70-a linear bearing, 71-an impact fixing seat, 72-an electromagnet fixing sleeve, 73-an electromagnet connecting block, 74-an electromagnet, 75-a propelling block, 76-a small switch, 77-a small battery, 78-a magnet, 79-a claw, 80-a claw sleeve and 81-O-shaped sealing rings; 82-Y-shaped sealing ring deformation piece, 83-high-pressure sealing ring, 84-sealing base, 85-L-shaped pressure reducing piece, 86-beryllium copper sealing ring, 87-sealing hoop, 88-small vibration exciter, 89-vibration exciter fixing piece, 90-third clamp knob, 91-first clamp knob, 92-force arm fixing block, 93-second clamp knob, 94-force arm extension piece, 95-fixing base body, 96-limiting block, 97-arc block, 98-permanent magnet, 99-magnetic core, 100-soft magnetic material, 101-thread gluing, 102-buckle, 103-two-end support, 104-heating resistor, 105-internal support, 106-thermistor fixing block, 107-thermistor, 108-cooling pipe fixing block, cooling pipe and cooling pipe, 109-fixed knob, 110-hinge group, 111-heat insulation shell, 112-heat insulation at two ends, 113-cooling liquid conveying pipe, 114-upright post, 115-top cover, 116-bracket, 117-toughened glass 118-platform slide rail, 119-supporting platform, 120-slide way, 121-laser displacement sensor and 122-high-speed camera.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited by the embodiments.
Fig. 1 is a schematic diagram of the overall three-dimensional structure of the test platform of the present invention, as shown in the figure: the test platform for testing the static and dynamic mechanical properties of the L-shaped pipeline of the aircraft engine comprises a tensile structure, a dynamic loading structure, a sealing structure, a multipoint vibration structure, a temperature gradient heating device, a measuring mechanism, a supporting platform 119 and a safety protection structure; the stretching structures are positioned at two ends of the straight pipe of the L-shaped pipe and fixed on the supporting platform 119; the power loading structure moves and is fixed right above the L-shaped pipe; the sealing structures are positioned at two ends of the L-shaped pipeline, one part of the sealing structures is inserted into the L-shaped pipeline, and the other part of the sealing structures is provided with a hoop and can be fixed on the L-shaped pipeline by utilizing the hoop; the measuring mechanism and the multipoint vibration structure can flexibly change positions, are placed around the L-shaped pipeline and can test the inner side part of the L-shaped pipeline elbow, the multipoint vibration structure comprises a plurality of vibration sources, and the plurality of vibration sources are arranged around the L-shaped pipeline to realize multipoint vibration excitation on the L-shaped pipeline; the temperature gradient heating device is fixed on the L-shaped pipe, and the test interval can be adjusted; the safety protection structure is located outside the integral platform and connected with the supporting platform through bolts.
Fig. 2 is a schematic overall perspective view of the stretching structure of the present invention, as shown in the drawings: the stretching structure comprises a first hydraulic cylinder 9, a second hydraulic cylinder 11, a hydraulic cylinder fixing block 8, a hydraulic cylinder slideway 13, a first V-shaped clamp 2, a second V-shaped clamp 4, a clamp slideway 6, a lower clamp hydraulic cylinder 5, an upper clamp hydraulic cylinder 1, a clamp fixing block 3, a fastening screw 7, an anti-crushing device, a first pressure sensing group, a sliding fixing block 10 and a sliding base body 12; the tensile structure can be used for testing an L-shaped pipeline and can also be used for testing a straight pipe by only utilizing a part of structures; the inner fixing device clamps and fixes the L-shaped pipeline elbow part, the two-end stretching hydraulic cylinder fixing devices are matched with the inner fixing device to clamp and fix the L-shaped pipeline straight pipe part, the two-end stretching hydraulic cylinder fixing devices A and the inner fixing device a can clamp and fix the straight pipe at one end of the L-shaped pipeline as can be seen from the diagram, the inner fixing device a and the inner fixing device B clamp and fix the L-shaped pipeline elbow part, and the inner fixing device B and the two-end stretching hydraulic cylinder fixing devices B clamp and fix the straight pipe at the other end of the L-shaped pipeline.
Fig. 3 is a schematic structural view of the internal fixation device of the stretching structure of the present invention, as shown in the drawings: the internal fixing device and the connection mode of the stretching structure are as follows: the first V-shaped clamp 2 is fixed with the first pressure sensing group through a screw and is fixed on the clamp slideway 6 through a screw; the clamp slideway 6 can slide on the platform slide rail 118 of the safety protection structure and is fixed at a required position by the fastening screw 7; according to the mode, the internal fixing device can be adjusted in position to adapt to clamping and fixing of bent pipe parts of different L-shaped pipelines; the lower clamp hydraulic cylinder 5 is fixed with the second V-shaped clamp 4; the upper clamp hydraulic cylinder 1 is fixed with the clamp fixing block 3; when the L-shaped pipeline is fixed by clamping, the lower clamp hydraulic cylinder 5 extends out, the second V-shaped clamp 4 is opened, the L-shaped pipeline is placed from top to bottom, the upper clamp hydraulic cylinder 1 extends out, the clamp fixing block 3 is in contact with the second V-shaped clamp 4 and is artificially connected with the second V-shaped clamp, and then the two hydraulic cylinders shrink simultaneously to complete clamping.
Fig. 4 is a schematic three-dimensional structure view (a hydraulic cylinder fixing block is cut) of the two-end stretching hydraulic cylinder fixing device of the stretching structure of the invention, as shown in the figure: the fixing device for the two-end stretching hydraulic cylinder of the stretching structure and the connection mode are as follows: the first hydraulic cylinder 9 is fixed on a hydraulic cylinder slideway 13 by a hydraulic cylinder fixing block 8; the sliding fixing block 10 and the sliding base body 12 fix the second hydraulic cylinder 11 and can slide on a hydraulic cylinder slideway 13; the hydraulic cylinder slideway 13 is fixed on the supporting platform 119 through bolts; the front end external thread end threads of the first hydraulic cylinder 9 and the second hydraulic cylinder 11 are respectively connected with the internal threads of the first V-shaped clamp 2 and the second V-shaped clamp 4 of the internal fixing device; the two-end stretching hydraulic cylinder fixing device provides axial load for a stretching test;
fig. 5 is a schematic structural view of an anti-collapse device of the stretching structure of the present invention, and fig. 6 is a schematic structural view of the anti-collapse structure of the stretching structure of the present invention in an open state, as shown in the figure: placing an anti-crushing device on the inner side of the pipeline, wherein the anti-crushing structure consists of a hinge top part 17, a bottom end hinge base 16, a top end hinge base 25, a chute 24, a first hinge connecting piece 20, a second hinge connecting piece 28, a first supporting rod 18, a second supporting rod 19, a third supporting rod 23, a fourth supporting rod 29, an intermediate reinforcing piece 22, an intermediate reinforcing fixing piece 21, a hollow threaded rod 27, a top end hinge upper part 26, a hydraulic cylinder 14, a supporting rod 15 and a second pressure sensing group; the whole structure is fixed by the contraction of the hydraulic cylinder 14, and the hydraulic cylinder 14 passes through the second pressure sensing group and is connected with the hollow threaded rod 27; the supporting rods 15 are arranged on two sides of the hollow threaded rod 27; the bottom end hinge base 16 is connected with the hinge top part 17 through screws, and three first supporting rods 18 which are uniformly distributed in the circumferential direction are clamped, and a hollow threaded rod 27 penetrates through the two supporting rods; the first hinge connecting piece 20 connects the first supporting rod 18 and the second supporting rod 19, and the second supporting rod 19 is clamped and fixed by the middle reinforcing fixing piece 21 and the middle reinforcing piece 22; the intermediate reinforcing fixing member 21, the intermediate reinforcing member 22 and the hinge top member 17 are connected by screws, passed through by the hollow threaded rod 27, and the other end holds the third supporting rod 23; the third supporting rod 23 is connected with a fourth supporting rod 29 through a second hinge connection 28; the fourth supporting rod 29 is clamped by the top hinge base 25 and the top hinge upper part 26, and the top hinge base 25, the top hinge upper part 26 and the hollow threaded rod 27 are connected by screws; the chute 24 is arranged outside the structure, limits the radial freedom degree by virtue of a first hinge connecting piece 20 and a second hinge connecting piece 28, is connected with the bottom end hinge base 16 and the top end hinge upper part 26 by virtue of springs and is always in a central position; in the action process, the anti-crushing structure is placed in the pipeline, the hydraulic cylinder 14 contracts, and the chute 24 is outwards expanded to prop against the inner wall of the L-shaped pipeline, so that the supporting effect is achieved, and the crushing is prevented;
fig. 7 is a schematic structural view (cover plate cut) of a second pressure sensing set with a stretching structure of the invention, as shown in the figure: the method has the effects of monitoring the inner wall holding force data in real time, serving as a control variable and reducing errors. The second pressure sensing group comprises four second pressure sensors 32, a cover plate 30, a base 31, a locking screw 34 and a locking nut 33; placing four second pressure sensors inside the base 31; the locking screw 34 is used for pre-tightening and fixing the second pressure sensor 32, a locking nut 33 is used for forming double-thread self-locking to prevent loosening, and the cover plate 30 is placed on the top of the second pressure sensor 32 and connected with the support rod 15;
fig. 8 is a schematic structural view (with a cut-away top cover) of a first pressure sensing set of the stretching structure of the present invention, as shown in the figure: the clamping force monitoring device has the effects of monitoring clamping force data in real time, controlling variables and reducing errors. The first pressure sensing group consists of four first pressure sensors 38, a top cover 35, a base body 37, a pre-tightening screw 40, a pre-tightening nut 39 and a hexagonal piece 36; four first pressure sensors 38 are placed on the upper portion of the base 37; the pre-tightening screw 40 pre-tightens and fixes the first pressure sensor 38, and a pre-tightening nut 39 forms double-thread self-locking to prevent loosening; the hexagonal member 36 is placed on the lower portion of the base 37 and fixed to the top cover 35 by means of countersunk screws.
The dynamic loading structure consists of a four-point bending structure, a mechanical impact collision structure and a dynamic structure; FIG. 11 is a schematic structural view (with a cutaway top cover of the power base) of the power structure of the present invention; as shown in the figure: the power structure consists of a motor 58, a differential 56, a gear 57, a power base 61, a power base top cover 55, wheels 52, a steering bearing fixing block 59, a steering bearing 60, a front bearing fixing block 53, a front bearing 54, a pressurizing spring 51, a pressurizing block 50, a lower bearing baffle 48 and a lower bearing 49; the motor 58 is connected with a gear 57, and the gear 57 is meshed with the differential 56; the motor 58, the gear 57 and the differential 56 are fixed by a power base 61 and a power base top cover 62; differential 56 is connected to wheels 52; the power base 61 is connected with the steering bearing fixing block 59; the steering bearing fixing block 59 is fixed with a fixing piece of a four-point bending structure, and a steering bearing 60 is connected in the middle; the front bearing 54 is connected with the power base 61 through a front bearing fixing piece 53; the pressurizing spring 51 is welded with the power base 61 and the pressurizing block 50, and the lower bearing 49 is connected with the pressurizing block 50 through the lower bearing stop piece 48; the L-shaped pipeline straight pipe and the L-shaped pipeline bent pipe can be moved and fixed above the L-shaped pipeline straight pipe and the L-shaped pipeline bent pipe;
FIG. 9 is a schematic structural view of the upper portion of a four-point bending structure of the present invention, as shown: the four-point bending structure is fixed through a screw and a power structure; the power structure moves and is fixed on the protective structure; the mechanical impact collision structure is fixed with the four-point bending structure; the four-point bending structure comprises a bending hydraulic cylinder 44, a fixing piece 41, a hydraulic cylinder fixing cylinder 42, a pressure block fixing piece 43, a pressure block sliding groove 47, a fastening knob 45, a pressure block 46 and a supporting structure; the bending hydraulic cylinder 44 is fixed by the hydraulic cylinder fixing cylinder 42 and the fixing piece 41; the fixing piece 41 is connected with a steering bearing fixing block 59 of the power structure; the pressure block fixing piece 43 and the pressure block sliding groove 47 fix the pressure block 46; the pressure block fixing piece 43 is fixed with the front end of the bending hydraulic cylinder 44 through threads; the fastening knob 45 can adjust the position of the pressure block 46 in the pressure block sliding groove 47 and fix the pressure block; the supporting structure is arranged on a platform slide rail of the safety protection structure and can be fixed at a position;
fig. 12 is a mechanism schematic view (the hydraulic cylinder fixing part is cut away) of the mechanical impact collision structure of the invention, and fig. 13 is an internal structure schematic view of the mechanical impact collision structure of the invention, as shown in the figure: the mechanical impact collision structure comprises an impact fixing seat 71, an impact hydraulic cylinder 65, a hydraulic cylinder fixing part 69, a magnet 78, an electromagnet fixing sleeve 72, an electromagnet connecting block 73, an electromagnet 74, a pushing block 75, a claw sleeve 80, a claw 79, an impact block 63, a punch 62, a guide rod 66, a linear bearing 70, a small switch 76, a small battery 77, an energy storage spring 64, a first pressure sensor, a set screw 67 and a set nut 68; the upper end of the impact fixing seat 71 is fixedly connected with a fixing piece of a four-point bending structure; the impact hydraulic cylinder 65 is fixed by an impact fixing seat 71 and a hydraulic cylinder fixing part 69; a groove is formed in the hydraulic cylinder fixing piece 69 and used for fixing the linear bearing 70, a first pressure sensor can be placed in the groove in the hydraulic cylinder fixing piece 69, the groove is pre-tightened and fixed through a set screw 67, and double-thread self-locking is formed between the groove and a set nut 68, so that loosening is prevented; the linear bearing 70 is connected with the guide rod 66 and used for limiting the track of the guide rod 66; the front end of the guide rod 66 is connected with the impact block 63 through threads, and an energy storage spring 64 is sleeved on the guide rod 66; the thread at the front end of the impact hydraulic cylinder 65 is connected with the electromagnet connecting block 73; the electromagnet 74 is arranged in the electromagnet fixing sleeve 72, and the electromagnet fixing sleeve 72 is connected with the claw sleeve 80 through a screw; the electromagnet connecting block 73 is fixed with the electromagnet 74 through a screw; the pushing block 75 is placed in the claw sleeve 80, the magnet 78 is placed in the claw 79 in an interference mode, and the whole body is placed in the claw sleeve 80; the small switch 76 is arranged at the bottom of the claw sleeve 80 and is connected with the claw sleeve 80 through a screw; the small battery 77 is welded with the small switch 76 to provide power; the punch 62 is connected with the impact block 63 through threads, and the angle can be finely adjusted; the structure can be used for testing straight pipes and bent pipes of L-shaped pipelines; the supporting structure is connected with the platform slide rail of the safety protection structure and can adjust the position, as shown in fig. 10, which is a schematic structural diagram of the supporting structure of the present invention; the supporting structure utilizes the bidirectional threaded rod to adjust the height of the structure, so that the structure can touch the outer wall of the L-shaped pipeline to play a supporting role, double threads are adopted for self locking, and the cross section is in an arc shape and is in point contact with the L-shaped pipeline; the structure can be used for testing the straight pipe part of the L-shaped pipeline;
fig. 14 is a schematic perspective view of the sealing structure of the present invention, and fig. 15 is a schematic structural view of the sealing structure of the present invention, as shown in the drawings: the sealing structure comprises an O-shaped sealing ring 81, a Y-shaped sealing ring deformation piece 82, an L-shaped pressure reduction piece 85, a high-pressure sealing ring 83, a sealing base 84, a sealing hoop 87 and a beryllium copper sealing ring 86; a beryllium copper sealing ring 86 is arranged at the bottom of the outer layer of the cylinder in the sealing base 84; the Y-shaped sealing ring deforming piece 82 is placed on the beryllium copper sealing ring 86; an L-shaped pressure reducing member 85 is placed at the bottom of the inner layer of the cylinder inside the sealing base 84; a high-pressure sealing ring 83 is arranged on the L-shaped sealing decompression part 85; an O-shaped sealing ring 81 is arranged in the high-pressure sealing ring 83; the seal clip 87 is external to the seal base 84; the whole sealing structure is integrally formed by pressure. In order to enable the movable rod to be better sealed, the top of the designed high-pressure sealing ring 83 is similar to a Y-shaped sealing ring and is combined with an O-shaped sealing ring 81, so that the situation that the top is thin and the basic supporting force is lost is avoided; in addition, the bottom has protrusions to form a tandem seal. The L-shaped pressure relief member 85 serves to prevent damage to the bottom of the high pressure seal ring when the movable rod is activated, while the inside of the assembly has a protrusion to form a series seal. The external part is static seal, the upper layer is a Y-shaped seal ring deformation piece 82, the lower part is a beryllium copper seal ring 86, and the beryllium copper seal ring is placed on the inner wall of a pipeline to generate deformation and enhance the sealing effect by utilizing the properties of good elasticity, wear resistance and the like of beryllium copper metal to form series seal; the sealing collar 87 prevents the assembly from falling out due to pressure.
Fig. 17 is a schematic structural diagram of the multipoint vibration structure of the present invention, as shown in the figure: the multipoint vibration structure comprises a small vibration exciter 88, a fixed base 95, a permanent magnet 98, a magnetic core 99, a soft magnetic material 100, a limiting block 96, an arc block 97, a vibration exciter fixing piece 89, a force arm extending piece 94, a force arm fixing block 92, a first clamp knob 91, a second clamp knob 93 and a third clamp knob 90; the soft magnetic material 100 is connected with the lower end of the fixed base 95 through threads; the permanent magnet 98 is placed in the magnetic core 99, the arc block 97 fills the vacancy and is placed in the fixed base 95, and the limiting block 96 limits the axial position of the magnetic core 99 and is connected to the fixed base 95 through threads; the force arm fixing block 92 is adjusted and fixed on the fixing base 95 through the first clamp knob 91; the force arm extension part 94 adjusts the position of the fixing and force arm fixing block 92 through the second clamp knob 93 to form a fixing clamp, as shown in the structural schematic diagram of the fixing clamp of the multipoint vibration structure of the invention in fig. 18; the vibration exciter fixing piece 89 can adjust the relative position with the force arm extending piece 94 through the third clamp knob 90; the miniature exciter 88 is clamped and fixed by the thread tension of the exciter fixing member 89.
The temperature gradient heating device comprises a thermistor 107, a heating resistor 104, a cooling liquid conveying pipe 113, a thermistor fixing block 106, a cooling pipe fixing block 108, two-end supports 103, an internal support 105, two-end heat insulation 112, a heat insulation shell 111, a hinge group 110, a thread gluing 101, a buckle 102 and a fixing knob 109;
the two-end supports 103 are respectively positioned at two ends, the two internal supports 105 are positioned in the middle and are fixedly connected inside the heat insulation shell 111 through threads to form a module base body; the cooling liquid conveying pipe is fixed on the module base body through the cooling pipe fixing block in a threaded connection mode; the thermistor 107 is fixed on the substrate through the thermistor fixing block 106 by screw connection; the heating resistor 104 is directly fixed on the substrate by screw connection; the two ends of the heat insulation 112 are fixed on the two ends of the support 103 through screw threads to form a module half part, as shown in the structural schematic diagram (the heat insulation shell is cut away) of the module half part of the temperature gradient heating device of the invention in fig. 19; the temperature gradient heating device is composed of two identical module halves; the halves are connected by hinge group 110; the thread gluing 101 is fixed on the half part through threads to form a space which can be opened and closed; the two ends of the heat insulation 112 are controlled by the string and the buckle 102 to control the opening size; the whole is fixed on the pipeline by a fixing knob 109. The cooling liquid transport pipe 113 is made of flexible materials which can resist low temperature and high temperature, can adapt to the adjustment of the length and radian of different L-shaped pipeline test positions, transports low-boiling-point refrigerant, and achieves the refrigeration purpose by utilizing the principle that the low-boiling-point refrigerant is vaporized to absorb heat and is liquefied to release heat; the heating resistor 104 is energized to heat, and a thermistor 107 is provided to sense the temperature, thereby collecting and processing the internal temperature of the mechanism. The length of a part of the connecting lead is reserved to avoid the extension of the lead length limiting mechanism when the structure is extended; the buckle 102 is used for adapting to different pipe diameters; except the main body frame part, the other parts adopt flexible materials which can resist low temperature and high temperature, in order to adapt to the adjustment of the length and radian of different L-shaped pipeline testing positions.
The measuring mechanism comprises a measuring mechanism and a corresponding fixing clamp; fig. 16 is a schematic structural diagram of a measuring mechanism of the present invention, as shown in the figure: the measuring mechanism comprises a high-speed camera 122, a laser displacement sensor 121, a strain gauge and a thermistor; the corresponding holding fixture holds the measuring mechanism and is then integrally fixed in the desired position on the support platform 119.
Fig. 20 is a schematic perspective view of the safety protection structure of the present invention, as shown in the drawings: the safety protection structure comprises a bracket 116, a vertical column 114, a top cover 115, a platform slide rail 118, a slide rail 120 and toughened glass 117; the bracket 116 is fixed with the supporting platform 119 through screws, and the upright column 114 is fixed with the bracket 116 to form a main body frame; the top cover 115 is fixed above the bracket 116; the platform slide rail 118 is fixed at the middle position of the supporting platform 119 through screws; the slide 120 is fixed on the peripheral edge of the support platform 119 and is internally provided with a sliding toughened glass 117.
The working process of the test platform specifically comprises the following steps:
(1) installing an L-shaped pipeline to be tested and other auxiliary devices;
(2) placing the collapse prevention mechanism into the intelligent laminating pipeline, fixing, and detecting whether the related mechanism and the test instrument work normally;
(3) after the measuring mechanism is installed, the safety protection device is closed for testing;
(4) starting a corresponding test module to perform required working condition simulation test;
(5) the measuring mechanism records experimental data and collects processing data at a processing end;
(6) and (5) turning off the platform power supply, and finishing the experiment after all parts are stabilized.
Claims (7)
1. A test platform for aeroengine L type pipeline static and dynamic mechanical properties test, its characterized in that: the device comprises a stretching structure, a power loading structure, a sealing structure, a multipoint vibration structure, a temperature gradient heating device, a measuring mechanism, a supporting platform and a safety protection structure; the stretching structures are positioned at two ends of the straight pipe of the L-shaped pipe and fixed on the supporting platform; the power loading structure moves and is fixed right above the L-shaped pipe; the sealing structures are positioned at two ends of the L-shaped pipeline, one part of the sealing structures is inserted into the L-shaped pipeline, and the other part of the sealing structures is provided with a hoop and can be fixed on the L-shaped pipeline by utilizing the hoop; the measuring mechanism and the multipoint vibration structure can flexibly change positions, are placed around the L-shaped pipeline and can test the inner side part of the L-shaped pipeline elbow, the multipoint vibration structure comprises a plurality of vibration sources, and the plurality of vibration sources are arranged around the L-shaped pipeline to realize multipoint vibration excitation on the L-shaped pipeline; the temperature gradient heating device is fixed on the L-shaped pipe, and the test interval can be adjusted; the safety protection structure is positioned outside the integral platform and is connected with the supporting platform through bolts;
the stretching structure comprises a first hydraulic cylinder, a second hydraulic cylinder, a hydraulic cylinder fixing block, a hydraulic cylinder slideway, a first V-shaped clamp, a second V-shaped clamp, a clamp slideway, a lower clamp hydraulic cylinder, an upper clamp hydraulic cylinder, a clamp fixing block, a fastening screw, an anti-crushing device, a first pressure sensing group, a sliding fixing block and a sliding base body;
the internal fixing device and the connection mode of the stretching structure are as follows: the first V-shaped clamp is fixed with the first pressure sensing group through a screw and is fixed to the clamp slideway through a screw; the clamp slideway can slide on a platform slide rail of the safety protection structure and is close to the fastening screw at a required position to be fixed; the lower clamp hydraulic cylinder is fixed with the second V-shaped clamp; the upper clamp hydraulic cylinder is fixed with the clamp fixing block;
the fixing device for the two-end stretching hydraulic cylinder of the stretching structure and the connection mode are as follows: the first hydraulic cylinder is fixed on the hydraulic cylinder slideway by virtue of a hydraulic cylinder fixing block; the sliding fixing block and the sliding base body are used for fixing the second hydraulic cylinder and can slide on a hydraulic cylinder slide rail; the hydraulic cylinder slideway is fixed on the supporting platform through a bolt; the front end external thread end threads of the first hydraulic cylinder and the second hydraulic cylinder are respectively connected with the internal threads of the first V-shaped clamp and the second V-shaped clamp of the internal fixing device;
an anti-crushing device is arranged on the inner side of the pipeline, and the anti-crushing device comprises a hinge top part, a bottom end hinge base, a top end hinge base, a sliding chute, a first hinge connecting part, a second hinge connecting part, a first supporting rod, a second supporting rod, a third supporting rod, a fourth supporting rod, an intermediate reinforcing part, an intermediate reinforcing fixing part, a hollow threaded rod, a top end hinge upper part, a hydraulic cylinder, a supporting rod and a second pressure sensing group; the whole structure is fixed by the contraction of a hydraulic cylinder, and the hydraulic cylinder passes through the second pressure sensing group and is connected with the hollow threaded rod; supporting rods are arranged on two sides of the hollow threaded rod; the bottom hinge base is connected with the hinge top part through screws, and is clamped with three first supporting rods which are uniformly distributed in the circumferential direction, and a hollow threaded rod penetrates through the two supporting rods; the first hinge connecting piece is connected with the first supporting rod and the second supporting rod, and the second supporting rod is clamped and fixed by the middle reinforcing fixing piece and the middle reinforcing piece; the middle reinforcing fixing piece, the middle reinforcing piece and the hinge top piece are connected through screws, are penetrated through by a hollow threaded rod, and clamp a third supporting rod at the other end; the third supporting rod is connected with the fourth supporting rod through a second hinge connecting piece; the fourth supporting rod is clamped by the top end hinge base and the top end hinge upper part, and the top end hinge base, the top end hinge upper part and the hollow threaded rod are connected through screws; the sliding chute is arranged outside the structure, limits the radial degree of freedom by virtue of a first hinge connecting piece and a second hinge connecting piece, is connected with the bottom hinge base and the upper part of the top hinge by virtue of a spring and is always positioned in the central position;
the second pressure sensing group comprises four second pressure sensors, a cover plate, a base, a locking screw and a locking nut; placing four second pressure sensors inside the base; the locking screw is used for pre-tightening and fixing the second pressure sensor, a locking nut is used for forming double-thread self-locking to prevent loosening, and the cover plate is placed at the top of the second pressure sensor and connected with the supporting rod;
the first pressure sensing group consists of four first pressure sensors, a top cover, a base body, a pre-tightening screw, a pre-tightening nut and a hexagonal piece; placing four first pressure sensors on the upper part of the base body; the pre-tightening screw pre-tightens and fixes the first pressure sensor, and a pre-tightening nut forms double-thread self-locking to prevent loosening; the hexagonal piece is placed at the lower part of the base body and is fixed with the top cover through countersunk screws.
2. The test platform for testing the static and dynamic performance of the L-shaped pipeline of the aircraft engine as claimed in claim 1, wherein: the dynamic loading structure consists of a four-point bending structure, a mechanical impact collision structure and a dynamic structure;
the power structure consists of a motor, a differential mechanism, a gear, a power base top cover, a wheel, a steering bearing fixing block, a steering bearing, a front bearing fixing piece, a front bearing, a pressurizing spring, a pressurizing block, a lower bearing blocking piece and a lower bearing; the motor is connected with the gear, and the gear is meshed with the differential; the motor, the gear and the differential are fixed by the power base and the power base top cover; the differential is connected with the wheels; the power base is connected with the steering bearing fixing block; the steering bearing fixing block is fixed with a fixing piece of a four-point bending structure, and the middle of the steering bearing fixing block is connected with a steering bearing; the front bearing is connected with the power base through a front bearing fixing piece; the pressurizing spring, the power base and the pressurizing block are welded together, and the lower bearing is connected with the pressurizing block through the lower bearing blocking piece;
the four-point bending structure is fixed through a screw and a power structure; the power structure moves and is fixed on the protective structure; the mechanical impact collision structure is fixed with the four-point bending structure; the four-point bending structure comprises a bending hydraulic cylinder, a fixing piece, a hydraulic cylinder fixing cylinder, a pressure block fixing piece, a pressure block chute, a fastening knob, a pressure block and a supporting structure; the bending hydraulic cylinder is fixed by the hydraulic cylinder fixing cylinder and the fixing piece; the fixing piece is connected with a steering bearing fixing block of the power structure; the pressure block fixing piece and the pressure block sliding groove fix the pressure block; the pressure block fixing piece is fixed with the front end of the bending hydraulic cylinder through threads; the fastening knob can adjust and fix the position of the pressure block in the pressure block sliding groove; the supporting structure is arranged on a platform slide rail of the safety protection structure and can be fixed at a position;
the mechanical impact collision structure comprises an impact fixing seat, an impact hydraulic cylinder, a hydraulic cylinder fixing part, a magnet, an electromagnet fixing sleeve, an electromagnet connecting block, an electromagnet, a propelling block, a claw sleeve, a claw, an impact block, a punch, a guide rod, a linear bearing, a small switch, a small battery, an energy storage spring, a first pressure sensor, a set screw and a set nut; the upper end of the impact fixing seat is fixedly connected with a fixing piece of a four-point bending structure; the impact hydraulic cylinder is fixed through the impact fixing seat and the hydraulic cylinder fixing piece; the inner groove of the hydraulic cylinder fixing piece is used for fixing the linear bearing, the first pressure sensor can be placed in the inner groove of the hydraulic cylinder fixing piece and is pre-tightened and fixed through the set screw, and double-thread self-locking is formed between the first pressure sensor and the set screw and a set nut, so that loosening is prevented; the linear bearing is connected with the guide rod and used for limiting the track of the guide rod; the front end of the guide rod is connected with the impact block by threads, and an energy storage spring is sleeved on the guide rod; the thread at the front end of the impact hydraulic cylinder is connected with the electromagnet connecting block; the electromagnet is arranged in the electromagnet fixing sleeve, and the electromagnet fixing sleeve is connected with the claw sleeve through a screw; the electromagnet connecting block is fixed with the electromagnet through a screw; the pushing block is placed in the claw sleeve, the magnet is placed in the claw in an interference manner, and the whole body is placed in the claw sleeve; the small switch is arranged at the bottom of the claw sleeve and is connected with the claw sleeve through a screw; the small battery is welded with the small switch to provide a power supply; the punch head is connected with the impact block through threads, and the angle can be finely adjusted; the supporting structure is connected with the platform sliding rail of the safety protection structure and can adjust the position.
3. The test platform for testing the static and dynamic performance of the L-shaped pipeline of the aircraft engine as claimed in claim 1, wherein: the sealing structure comprises an O-shaped sealing ring, a Y-shaped sealing ring deformation piece, an L-shaped decompression piece, a high-pressure sealing ring, a sealing base, a sealing hoop and a beryllium copper sealing ring; a beryllium copper sealing ring is placed at the bottom of the outer layer of the cylinder inside the sealing base; a Y-shaped sealing ring deformation piece is placed on the beryllium copper sealing ring; an L-shaped pressure reducing piece is placed at the bottom of the inner layer of the cylinder in the sealing base body; a high-pressure sealing ring is arranged on the L-shaped sealing decompression piece; an O-shaped sealing ring is arranged in the high-pressure sealing ring; the sealing hoop is arranged outside the sealing base; the whole sealing structure is integrally formed by pressure.
4. The test platform for testing the static and dynamic performance of the L-shaped pipeline of the aircraft engine as claimed in claim 1, wherein: the multipoint vibration structure comprises a small vibration exciter, a fixed base body, a permanent magnet, a magnetic core, a soft magnetic material, a limiting block, an arc block, a vibration exciter fixing piece, a force arm extending piece, a force arm fixing block, a first clamp knob, a second clamp knob and a third clamp knob; the soft magnetic materials are connected at the lower end of the fixed base body through threads; the permanent magnet is placed in the magnetic core, the arc block fills the vacancy and is placed in the fixed base body, and the limiting block limits the axial position of the magnetic core and is connected to the fixed base body through threads; the force arm fixing block is adjusted and fixed at the position on the fixed base body through a first clamp knob; the force arm extension piece is adjusted and fixed with the position of the force arm fixing block through a second clamp knob to form a fixing clamp; the vibration exciter fixing piece passes through the third clamp knob and the force arm extending piece, and the relative position of the vibration exciter fixing piece and the force arm extending piece can be adjusted; the small vibration exciter is clamped and fixed through the thread tensioning effect of the vibration exciter fixing piece.
5. The test platform for testing the static and dynamic performance of the L-shaped pipeline of the aircraft engine as claimed in claim 1, wherein: the temperature gradient heating device comprises a thermistor, a heating resistor, a cooling liquid conveying pipe, a thermistor fixing block, a cooling pipe fixing block, two-end supports, an internal support, two-end heat insulation, a heat insulation shell, a hinge group, a thread gluing, a buckle and a fixing knob;
the two end supports are respectively positioned at two ends, the two internal supports are positioned in the middle, and the two internal supports are fixedly connected in the heat insulation shell through threads to form a module base body; the cooling liquid conveying pipe is fixed on the module base body through the cooling pipe fixing block in a threaded connection mode; the thermistor is fixed on the substrate through the thermistor fixing block by threaded connection; the heating resistor is directly fixed on the substrate by screw thread connection; the two ends of the module are insulated and fixed on the two end supports through threads to form a module half part; the temperature gradient heating device is composed of two identical module halves; the half parts are connected by a hinge group; the thread gluing is fixed on the half part through threads to form a space which can be opened and closed; the size of the opening is controlled by a string and a buckle for heat insulation at two ends; the whole body is fixed on the pipeline through a fixed knob.
6. The test platform for testing the static and dynamic performance of the L-shaped pipeline of the aircraft engine as claimed in claim 1, wherein: the measuring mechanism comprises a measuring mechanism and a corresponding fixing clamp; the measuring mechanism comprises a high-speed camera, a laser displacement sensor, a strain gauge and a thermistor; the corresponding fixing clamp fixes the measuring mechanism and then integrally fixes the measuring mechanism at the required position of the supporting platform.
7. The test platform for testing the static and dynamic performance of the L-shaped pipeline of the aircraft engine as claimed in claim 1, wherein: the safety protection structure comprises a support, a stand column, a top cover, a platform slide rail, a slide way and toughened glass; the support is fixed with the supporting platform through screws, and the upright posts are fixed with the support to form a main body frame; the top cover is fixed above the bracket; the platform slide rail is fixed at the middle position of the supporting platform through a screw; the slideway is fixed on the peripheral edge of the supporting platform, and the sliding toughened glass is arranged in the slideway.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629043.1A CN111780957B (en) | 2020-07-01 | 2020-07-01 | Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010629043.1A CN111780957B (en) | 2020-07-01 | 2020-07-01 | Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111780957A CN111780957A (en) | 2020-10-16 |
| CN111780957B true CN111780957B (en) | 2022-03-29 |
Family
ID=72758407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010629043.1A Active CN111780957B (en) | 2020-07-01 | 2020-07-01 | Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111780957B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595477A (en) * | 2020-11-09 | 2021-04-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Excitation clamping device for arc-shaped air inlet pipe vibration test |
| CN113533079B (en) * | 2021-08-03 | 2024-03-15 | 上海乐橘科技有限公司 | Plastic pallet mechanical strength check out test set |
| CN116399735B (en) * | 2023-06-08 | 2023-08-04 | 山东健宇电气有限公司 | Tension testing device for crimping copper connector for distribution box |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1201706A1 (en) * | 1984-03-15 | 1985-12-30 | Предприятие П/Я Г-4150 | Bed for testing pipeline vibrations |
| CN104677746A (en) * | 2015-02-02 | 2015-06-03 | 吉林大学 | Testing device and testing method for high-temperature fatigue property of microelement under compound stress |
| CN106092801A (en) * | 2016-05-31 | 2016-11-09 | 西安交通大学 | A kind of persistently gradient temperature combines thermal shock experiment System and method for after the match |
| GB2550192A (en) * | 2016-05-12 | 2017-11-15 | Xodus Group Ltd | Pipework Fatigue Lifetime Measurement |
| CN107515150A (en) * | 2017-08-09 | 2017-12-26 | 中国石油大学(北京) | A kind of off-shore pipeline mechanical property integration test experimental provision |
| CN107575437A (en) * | 2017-11-01 | 2018-01-12 | 燕山大学 | A kind of aerospace hydraulic pump and fluid pressure line performance test experiment table |
| CN107817082A (en) * | 2016-09-14 | 2018-03-20 | 上海汽车集团股份有限公司 | Charge inter cooling pipeline device for testing endurance and the method using its test |
| CN108717026A (en) * | 2018-06-19 | 2018-10-30 | 北京航空航天大学 | A kind of small-sized piezoelectric ceramic driving in situ fatigue test machine considering temperature gradient |
| CN110455485A (en) * | 2019-08-21 | 2019-11-15 | 东北大学 | A kind of multiple spot lower multiple material blade thermal environment impact performance test device excited by impact |
| CN111156224A (en) * | 2020-02-05 | 2020-05-15 | 辽宁科技大学 | Support device for vibration test of hydraulic pipeline of aircraft engine |
| CN111219537A (en) * | 2020-03-13 | 2020-06-02 | 辽宁科技大学 | Pipeline supporting device for multi-pipe-diameter flexible test of aviation hydraulic pipeline system |
-
2020
- 2020-07-01 CN CN202010629043.1A patent/CN111780957B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1201706A1 (en) * | 1984-03-15 | 1985-12-30 | Предприятие П/Я Г-4150 | Bed for testing pipeline vibrations |
| CN104677746A (en) * | 2015-02-02 | 2015-06-03 | 吉林大学 | Testing device and testing method for high-temperature fatigue property of microelement under compound stress |
| GB2550192A (en) * | 2016-05-12 | 2017-11-15 | Xodus Group Ltd | Pipework Fatigue Lifetime Measurement |
| CN106092801A (en) * | 2016-05-31 | 2016-11-09 | 西安交通大学 | A kind of persistently gradient temperature combines thermal shock experiment System and method for after the match |
| CN107817082A (en) * | 2016-09-14 | 2018-03-20 | 上海汽车集团股份有限公司 | Charge inter cooling pipeline device for testing endurance and the method using its test |
| CN107515150A (en) * | 2017-08-09 | 2017-12-26 | 中国石油大学(北京) | A kind of off-shore pipeline mechanical property integration test experimental provision |
| CN107575437A (en) * | 2017-11-01 | 2018-01-12 | 燕山大学 | A kind of aerospace hydraulic pump and fluid pressure line performance test experiment table |
| CN108717026A (en) * | 2018-06-19 | 2018-10-30 | 北京航空航天大学 | A kind of small-sized piezoelectric ceramic driving in situ fatigue test machine considering temperature gradient |
| CN110455485A (en) * | 2019-08-21 | 2019-11-15 | 东北大学 | A kind of multiple spot lower multiple material blade thermal environment impact performance test device excited by impact |
| CN111156224A (en) * | 2020-02-05 | 2020-05-15 | 辽宁科技大学 | Support device for vibration test of hydraulic pipeline of aircraft engine |
| CN111219537A (en) * | 2020-03-13 | 2020-06-02 | 辽宁科技大学 | Pipeline supporting device for multi-pipe-diameter flexible test of aviation hydraulic pipeline system |
Non-Patent Citations (2)
| Title |
|---|
| A dynamic modeling approach for nonlinear vibration analysis of the L-type pipeline system with clamps;Qingdong CHAI 等;《Chinese Journal of Aeronautics》;20200611;全文 * |
| 航空发动机液压管路振动环境实验测试系统设计;林君哲 等;《机械设计与制造》;20140531(第5期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111780957A (en) | 2020-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111780957B (en) | Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine | |
| Onder et al. | Burst failure load of composite pressure vessels | |
| AU2014388970B2 (en) | Distributed sensing optical fiber multi-objective multi-degree-of-freedom static and dynamic test device and method | |
| CN107575437B (en) | Performance test experiment table for aviation hydraulic pump and hydraulic pipeline | |
| CN105606453B (en) | A kind of large-sized composite material beanpod bar is compressed axially the test system of performance | |
| CN110425189B (en) | Ultrahigh-speed turbine pump and overflow valve matching test device | |
| CN105241612A (en) | Dynamic test device and method for thread sealing performance of oil pipe adapter | |
| CN110440999A (en) | The experimental rig that special thread oil casing leakproofness monitors under a kind of dynamic load operating condition | |
| CN107727487A (en) | Material at high temperature Mechanics Performance Testing equipment under a kind of aerothermodynamic coupling environment | |
| CN108507882A (en) | Material mechanical property in-situ test equipment for neutron scattering analysis | |
| Li et al. | A new method for nondestructive fault diagnosis of reciprocating compressor by means of strain-based p–V diagram | |
| CN104807432A (en) | Soft measuring method of axial deformation quantity of rectangular rubber sealing ring based on flexible screwing assembly | |
| CN110394202A (en) | A kind of test device for the simulation deep sea low temperature ultra-high voltage environment that can be observed in real time | |
| CN210347362U (en) | Compensator constant pressure fatigue testing machine | |
| CN201034796Y (en) | Device detecting automobile air conditioner system | |
| CN108169004B (en) | System and method for observing radiation temperature field in process of destroying gas-containing coal | |
| CN208171759U (en) | Material mechanical property in-situ test equipment for neutron scattering analysis | |
| CN207396193U (en) | Material at high temperature Mechanics Performance Testing equipment under a kind of Aerodynamic Heating-couple of force cyclization border | |
| CN106153318B (en) | Precise bushing valve couple performance test measuring device | |
| CN114323992A (en) | Device and method for testing concrete creep characteristic under positive and negative temperature alternating action | |
| CN111188678B (en) | Balanced type exhaust branch pipe assembly for single cylinder diesel engine | |
| CN112284929A (en) | Multifunctional multi-direction rock shearing-seepage-temperature multi-field coupling test method | |
| CN208125300U (en) | A kind of cryogenic valve temperature detection experimental rig | |
| Jones | Assessing instability of thin-walled tubes under biaxial stresses in the plastic range: Paper discusses some of the problems associated with subjecting thin-walled tubes to various combinations of internal pressure and independent axial load | |
| CN115184005B (en) | Test experiment table for friction force of valve kinematic pair at low temperature |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |