CN110702292B - Engine test bed air inlet thrust measuring device and using method - Google Patents
Engine test bed air inlet thrust measuring device and using method Download PDFInfo
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- CN110702292B CN110702292B CN201911189178.4A CN201911189178A CN110702292B CN 110702292 B CN110702292 B CN 110702292B CN 201911189178 A CN201911189178 A CN 201911189178A CN 110702292 B CN110702292 B CN 110702292B
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- air inlet
- mounting seat
- movable frame
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- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004088 simulation Methods 0.000 claims abstract description 73
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 38
- 239000001301 oxygen Substances 0.000 claims abstract description 38
- 238000005259 measurement Methods 0.000 claims abstract description 12
- 230000007246 mechanism Effects 0.000 claims description 39
- 239000000446 fuel Substances 0.000 claims description 33
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 239000003921 oil Substances 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/13—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles
- G01L5/133—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles for measuring thrust of propulsive devices, e.g. of propellers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/14—Testing gas-turbine engines or jet-propulsion engines
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Analytical Chemistry (AREA)
- Testing Of Engines (AREA)
Abstract
An intake thrust measuring device of an engine test bed comprises an intake system, an engine thrust measuring rack and a simulation cabin; the engine thrust measuring rack is fixedly arranged in the simulation cabin, and the tested engine is arranged on the engine thrust measuring rack; the air inlet system is communicated with the tested engine. According to the air inlet thrust measuring device of the engine test bed and the application method of the air inlet thrust measuring device, the air inlet system is in a mode of adjusting the total air inlet pressure and the oxygen content firstly, then adjusting the total air inlet temperature, and then finely adjusting the total air inlet pressure and then supplying oil for ignition, so that the adjusting speed is high, the adjusting time of air inlet simulation of the engine test bed is saved, the test cost is reduced, and the energy waste is avoided. In addition, the engine thrust measuring rack realizes the measurement of the engine thrust and has a simple structure.
Description
Technical Field
The invention relates to the technical field of engine tests, in particular to an engine test bed air inlet thrust measuring device and a using method thereof.
Background
The engine test and test technology is an important component of the solid propulsion technology, before the aeroengine is tested, a simulation test is needed to be carried out on the ground, a set of air inlet parameters are required during the engine test, the air inlet parameters comprise total air inlet pressure, air inlet air flow, air inlet oxygen content, total air inlet temperature and engine oil supply quantity are called air inlet state points, and after the set value and stability are achieved, the performance and the parameters of the aeroengine are recorded or the performance of the aeroengine is checked. With the gradual maturity of engines, the application of the engines is becoming wider, and on the basis, when the engine is used for the engines of airplanes, especially unmanned aerial vehicles, and the ground test of the engines, an engine air inlet system needs to simulate the air inlet state of the engines, the existing engine test bed technology has no mature technology for the air inlet simulation of the engines, and meanwhile, no accurate theoretical judgment method is available when the simulation state reaches the stable state, so that the experimental simulation effect is poor, the experimental period is long, the cost is high, and the resource waste condition is serious.
In addition, the thrust measurement is an important parameter to be measured in engine tests and tests. To study engine thrust, a number of trial and error tests are required, which would not be possible if they were all put into flight testing. The main reasons are high cost, long period, small information harvest, risk and great manpower consumption. The engine ground test is to perform static test on the system according to specific conditions and environmental requirements on the ground, and obtain various performance index information describing the system so as to solve the key problems in the engine thrust test process, however, in the prior art, no mature technology exists for experimental equipment of the engine thrust.
Disclosure of Invention
The technical solution of the invention is as follows: overcomes the defects of the prior art and provides an engine test bed air inlet thrust measuring device and a using method thereof.
The technical scheme of the invention is as follows: an intake thrust measuring device of an engine test bed comprises an intake system, an engine thrust measuring rack and a simulation cabin; the engine thrust measuring rack is fixedly arranged in the simulation cabin, and the tested engine is arranged on the engine thrust measuring rack; the air inlet system is communicated with the tested engine.
A method for measuring engine thrust using the engine test stand intake thrust measurement simulation engine intake parameters of claim, comprising the steps of:
s100), mounting the tested engine and the measuring section
S110), sequentially passing a measuring section for measuring the air inlet parameter of the engine through a first measuring section bracket and a second measuring section bracket, and placing the measuring section in the first measuring section bracket and the second measuring section bracket;
s120), installing the front joint and the rear joint on an engine installation top frame according to the suspension position of the tested engine;
s130), mounting the tested engine on the front joint and the rear joint after mounting the tested engine mounting frame on the movable frame body;
s140), adjusting the measuring section, connecting one end of the measuring section with the air inlet of the tested engine, adjusting the bracket of the measuring section, and positioning the measuring section after the measuring section is coaxial with the air inlet of the engine;
s200), dismounting and locking device
Loosening the tightening nuts, sequentially tightening the baffle plates from the vertical plate of the rear mounting seat by the tightening screw rods, and taking out the tightening baffle plates after the baffle plates at the rear end of the movable frame body are pulled out;
s300), determining a working force sensor error
S310), the industrial personal computer controls the servo motor to start to drive the hydraulic loading device to work, the hydraulic loading device drives the calibration oil cylinder to work, the piston of the calibration oil cylinder drives the standard force sensor to displace and further drives the movable frame body to displace, and force is applied to the working force sensor in the process of displacing the movable frame body;
S320), the hydraulic loading device drives the calibration oil cylinder to work, and the loading force is unloaded to a zero value after the loading force is continuously applied to the standard force sensor to a preset value; the standard force sensor data acquisition device and the working force sensor data acquisition device respectively acquire force values output by the standard force sensor and the working force sensor in the process of applying loading force and unloading loading force and feed the force values back to the industrial personal computer, and the display displays the force values output by the standard force sensor and the working force sensor acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device in the process of applying loading force and unloading loading force;
s330), drawing characteristic graphs of the standard force sensor and the working force sensor according to force values output by the standard force sensor and the working force sensor, which are acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device and displayed by the display, in the process of applying loading force and unloading loading force; under the same loading force, the difference between the force value output by the working force sensor acquired by the working force sensor data acquisition device and the force value output by the standard force sensor acquired by the standard force sensor data acquisition device is the error of the working force sensor;
S400), simulating engine air inlet parameters
S410), adjusting an engine air inlet supply pressure adjusting valve and an oxygen supply flow adjusting valve according to the total air inlet pressure and the oxygen content of the simulation state point, so that the total pressure and the oxygen content of the second medium passing through the outlet of the measuring section are the same as the total air inlet pressure and the oxygen content of the simulation state point;
s420), adjusting the alcohol supply flow regulating valve according to the total air inlet temperature of the simulation state point, starting the igniter, igniting the alcohol to burn the alcohol, and exchanging heat between the burned alcohol and the second medium of the second medium channel in the first medium channel to enable the total air inlet temperature of the second medium passing through the outlet of the measuring section to be the same as the total air inlet temperature of the simulation state point;
s430), adjusting an engine air inlet supply pressure adjusting valve according to the air inlet total pressure of the simulation state point, so that the total pressure of the second medium passing through the outlet of the measuring section is the same as the air inlet total pressure of the simulation state point;
s500), a state point simulation test and a measurement of the thrust of the engine under test at the state point
And (3) adjusting a fuel supply flow regulating valve of the engine according to the fuel demand of the engine simulation state point to ensure that the fuel supplied by a fuel supply source is the same as the fuel demand of the engine simulation state point, igniting the engine, performing an air inlet simulation test of the simulation state point, and displaying the force value output by the working force sensor acquired by the working force sensor data acquisition device by a display.
Compared with the prior art, the invention has the advantages that:
1. according to the air inlet thrust measuring device of the engine test bed and the application method of the air inlet thrust measuring device, the air inlet system is in a mode of adjusting the total air inlet pressure and the oxygen content firstly, then adjusting the total air inlet temperature, and then finely adjusting the total air inlet pressure and then supplying oil for ignition, so that the adjusting speed is high, the adjusting time of air inlet simulation of the engine test bed is saved, the test cost is reduced, and the energy waste is avoided.
2. According to the air inlet thrust measuring device of the engine test bed and the application method thereof, the air inlet system simulates the air inlet flow and the total air inlet pressure of the engine through the air inlet supply source of the engine, and meanwhile, the oxygen supply source supplements oxygen for the air inlet of the engine and the air inlet temperature of the engine is simulated through the temperature simulation unit, so that the real simulation of the air inlet of the engine is realized, and the simulation precision is high.
3. According to the device for measuring the air inlet thrust of the engine test bed and the application method thereof, the air inlet system is provided with the alcohol supply source, the heat generated by igniting alcohol through the igniter exchanges heat with the air inlet of the engine in the temperature simulation unit, and the air inlet temperature of the engine is adjusted.
4. According to the device for measuring the air inlet thrust of the engine test bed and the application method thereof, the air inlet system is provided with various valves, so that the flow and the pressure of related supply sources are adjustable, and the simulation of multiple state points is realized.
5. The engine test bed air inlet thrust measuring device and the application method thereof realize the measurement of the engine thrust, and have simple structure.
6. The engine test bed air inlet thrust measuring device and the application method thereof are simple and easy to implement, and the engine thrust measuring rack skillfully hangs the movable rack on the fixed rack through the spring piece and is assisted with the force sensor to measure the thrust of the engine.
7. According to the device for measuring the air inlet thrust of the engine test bed and the application method thereof, the measuring section bracket is arranged in the engine thrust measuring rack so as to ensure that the measuring section for measuring the air inlet parameters of the tested engine is coaxial with the engine, thereby ensuring the air inlet simulation precision of the engine and improving the air inlet parameter measurement precision of the engine.
8. In the engine test bed air inlet thrust measuring device and the application method thereof, the overall rigidity of the movable frame is higher, in order to ensure the dynamic performance of the test bed, stress elements are reasonably distributed in design, the structural equal-strength principle is adopted, and the optimization designs such as unstressed parts of materials and the like are removed, so that the quality of the movable frame is reduced.
9. According to the device for measuring the air inlet thrust of the engine test bed and the application method thereof, in the engine thrust measuring rack, the horizontal base is arranged on the fixed rack, so that the bearing capacity of the whole fixed rack is improved.
10. According to the air inlet thrust measuring device of the engine test stand and the application method thereof, the locking state is set in the engine thrust measuring stand, so that the movable stand and the fixed stand maintain a fixed state when the engine is installed in an untested state or before test, the service life of the engine thrust measuring stand is prolonged, meanwhile, irreversible external force is prevented from being applied to a spring piece or even the spring piece is prevented from being damaged when the engine and the related test piece are installed under the self state (the locking state is not used) of the movable stand, and the accuracy of the engine thrust measuring stand is ensured.
11. According to the engine test bed air inlet thrust measuring device and the application method thereof, the gantry engine mounting frame is adopted in the engine thrust measuring rack, so that the engine is suspended, the measuring precision of the engine thrust is improved, the positions of the front joint and the rear joint are adjustable, the application range of the engine mounting frame is greatly improved, and the problem that one engine mounting frame is arranged for one engine in the past is solved.
12. In the engine thrust measuring bench, the standard force sensor is adopted to carry out error determination and static calibration on the working force sensor, so that a group of high-precision known 'analog thrust' is generated to carry out degree determination on the force measuring system.
13. According to the device for measuring the air inlet thrust of the engine test bed and the application method thereof, in the engine thrust measurement bed, the characteristic graphs of the standard force sensor and the working force sensor are drawn through calibration, the force value output by the working force sensor is accurately determined through the characteristic graphs, and therefore calibration of the working force sensor by each test is avoided, the cost is low, and the efficiency is high.
Drawings
Fig. 1 is a schematic structural view of an intake thrust measuring device of an engine test stand according to the present invention.
Fig. 2 is a front view showing the structure of an engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 3 is an enlarged view of the portion a in fig. 2.
Fig. 4 is an enlarged view of the portion B in fig. 2.
Fig. 5 is a plan view showing the structure of an engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 6 is an enlarged view of the portion C in fig. 5.
Fig. 7 is a schematic view showing a structure of a measuring section bracket of an engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 8 is an enlarged view of the portion D in fig. 7.
Fig. 9 is an enlarged view of the portion E in fig. 7.
Fig. 10 is a front view of the structure of an engine mount of the engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 11 is a structural side view of an engine mount of an engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 12 is a schematic view of the structure of an engine mounting head frame of the engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 13 is a schematic diagram of the force sensor calibration of the engine thrust measuring stand in the engine test stand intake thrust measuring device of the present invention.
Fig. 14 is a schematic view showing a partial structure of a temperature simulation unit of an intake system in the engine test stand intake thrust measuring device of the present invention.
Detailed Description
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "abutting" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The pressure, total pressure, static pressure, dynamic pressure, temperature, total temperature and static temperature of the air inlet system are the same as those of the prior application (application number: CN201811164305.0, name: an engine test bed air inlet system) of the applicant, and in addition, the air inlet system is arranged in a first medium channel inlet, a first medium channel outlet, a second medium channel inlet, a second medium channel outlet and a second medium channel, a measuring section inlet and a measuring section outlet are respectively provided with a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are respectively arranged in the direction facing the air flow and are used for measuring the total pressure and the total temperature of the section of the sensor.
The test bed for the multi-state point simulation test of the engine comprises an air inlet system, an engine thrust measuring rack and a simulation cabin 900; the engine thrust measuring rack is fixedly arranged in the simulation cabin 900, and the tested engine 1 is arranged on the engine thrust measuring rack; the exhaust system communicates with the engine under test 1. The parameters of each state point in the engine comprise total air intake pressure, air intake air flow, air intake oxygen component, total air intake temperature and engine oil supply quantity of the engine.
The air intake system includes a supply source and a temperature simulation unit 60.
The supplies include a fuel supply 10, an oxygen supply 20, an engine intake supply 30, and an alcohol supply 40.
The temperature simulation unit comprises a pipe body 61 and a shell 62, wherein the pipe body 61 is positioned in the shell 62, a first medium channel is formed in the pipe body 61, and a second medium channel is formed in a space between the outer wall of the pipe body 61 and the inner wall of the shell 62; when the temperature simulation unit 60 works, a first medium flows in the first medium channel, a second medium flows in the second medium channel, the temperature of the first medium is higher than that of the second medium, and the first medium and the second medium exchange heat through the wall of the pipe body 61, wherein the specific structure and the specific connection mode of the temperature simulation unit 60 are disclosed in the applicant's prior application (application number: CN201811164300.8, the invention name: an air inlet system of an engine test bed).
The fuel oil supply source 10 is communicated with the tested engine 1 through a pipeline, the oxygen supply source 20 and the engine air inlet supply source 30 are respectively communicated with an inlet of a second medium channel through pipelines, an outlet of the second medium channel is communicated with an inlet of a measuring section 401 through a pipeline, and an outlet of the measuring section 401 is fixedly communicated with an air suction port of the tested engine 1 to provide simulated engine air inlet flow, air inlet total pressure and oxygen content for the tested engine 1; the alcohol supply source 40 is communicated with the inlet of the first medium channel through a pipeline after passing through the igniter, the outlet of the first medium channel is communicated with the outside, the igniter exchanges heat between the alcohol ignited and combusted to generate heat in the temperature simulation unit 60 and the second medium in the second medium channel to adjust the temperature of the second medium in the second medium channel, so that the air inlet temperature simulation of the engine is realized, and the air inlet simulation of the engine is real, high in accuracy and simple in structure.
An engine fuel supply flow regulating valve 51 is arranged on a pipeline which is communicated with the fuel supply source 10 and the tested engine 1, an oxygen supply flow regulating valve 53 is arranged on a pipeline which is communicated with the oxygen supply source 20 and the inlet of the second medium channel, an engine air inlet supply pressure regulating valve 55 is arranged on a pipeline which is communicated with the engine air inlet supply source 30 and the inlet of the second medium channel, and an alcohol supply flow regulating valve 56 is arranged on a pipeline which is communicated with the alcohol supply source 40 and the inlet of the first medium channel so as to realize parameter regulation of each supply source and meet simulation of multiple state points.
Preferably, the intake system includes an engine fuel supply shutoff valve 52, an oxygen supply shutoff valve 54, and an alcohol supply shutoff valve 57, the engine fuel supply shutoff valve 52 being provided on a line that communicates the fuel supply source 10 with the subject engine 1; the oxygen supply shutoff valve 54 is provided on a line that communicates the oxygen supply source 20 with the inlet of the second medium passage; the alcohol supply shutoff valve 57 is provided on a line that communicates the alcohol supply source 40 with the inlet of the first medium passage. In the use process of the air intake system, the engine fuel supply stop valve 52 is opened before the engine fuel supply flow rate regulating valve 51 is opened, the oxygen supply stop valve 54 is opened before the oxygen supply flow rate regulating valve 53 is opened, and the alcohol supply stop valve 57 is opened before the alcohol supply flow rate regulating valve 56 is opened; the engine fuel supply flow rate regulating valve 51 is closed, the engine fuel supply stop valve 52 is closed, the oxygen supply flow rate regulating valve 53 is closed, the oxygen supply stop valve 54 is closed, the alcohol supply flow rate regulating valve 56 is closed, and the alcohol supply stop valve 57 is closed, so that the safety of the air intake system in a non-experimental state is ensured.
The engine thrust measuring rack comprises a fixed rack 100, a movable rack 200 and a loading measuring device; the loading measuring device comprises a spring piece, a loading mechanism 330 and a working force sensor 350; the movable frame 200 is suspended on the fixed frame 100 through the spring piece, the loading mechanism 330 is fixedly installed on the fixed frame 100, and two ends of the working force sensor 350 are respectively connected with the fixed frame 100 and the movable frame 200.
The fixed frame comprises a base 110, a front mounting seat 120, a loading mechanism mounting seat 130, a first fixed frame spring piece mounting seat 140, a fixed frame working force sensor mounting seat 150, a rear mounting seat 160 and a second fixed frame spring piece mounting seat 170; the base 110 is in a cuboid structure, and the front mounting seat 120 and the rear mounting seat 160 are respectively and fixedly mounted at the front end and the rear end of the base 110 along the length direction of the base 110, the rear mounting seat 160 comprises a transverse plate and a vertical plate, and the transverse plate and the vertical plate form an L shape; the loading mechanism mounting seat 130 is fixedly mounted on the front mounting seat 120, the first fixed frame spring piece mounting seat 140 comprises a first right fixed frame spring piece mounting seat 141 and a first left fixed frame spring piece mounting seat 142, and the first right fixed frame spring piece mounting seat 141 and the first left fixed frame spring piece mounting seat 142 are fixedly mounted at the front end of the base 110 and are respectively positioned at two sides of the front mounting seat 120; the fixed frame working force sensor mounting base 150 is fixedly mounted on the base 110 and is positioned on a central line along the length direction of the base 110; the second fixed frame spring piece mounting seat 170 includes a second right fixed frame spring piece mounting seat 171 and a second left fixed frame spring piece mounting seat 172, and the second right fixed frame spring piece mounting seat 171 and the second left fixed frame spring piece mounting seat 172 are fixedly mounted at the rear end of the base 110 and are respectively located at two sides of the rear mounting seat 160.
The movable frame 200 includes a movable frame body 210, a first movable frame spring leaf mounting seat 220, a movable frame work force sensor mounting seat 230, a second movable frame spring leaf mounting seat 240 and a movable frame standard force sensor mounting seat 250, where the movable frame body 210 includes a right movable frame body 211, a left movable frame body 212 and a movable frame connecting plate 260, the right movable frame body 211 and the left movable frame body 212 are identical in structure, are both rectangular structures and are parallel to the base 110, a center line of the right movable frame body 211 and the left movable frame body 212 along the length direction is parallel to a center line of the base 110 along the length direction, the right movable frame body 211 and the left movable frame body 212 are symmetrically arranged relative to the center line of the base 110 along the length direction, and the movable frame connecting plate 260 is a plurality of the movable frame connecting plates 260 fixedly connects the right movable frame body 211 and the left movable frame body 212; along the length direction of the movable frame body 210, a movable frame standard force sensor mounting seat 250 is fixedly mounted on the bottom surface of the front end of the movable frame body 210; the first movable frame spring piece mounting seat 220 includes a first right movable frame spring piece mounting seat and a first left movable frame spring piece mounting seat, and the first right movable frame spring piece mounting seat and the first left movable frame spring piece mounting seat are respectively and fixedly mounted on front end bottom surfaces of the right movable frame body 211 and the left movable frame body 212 and are respectively positioned on two sides of the movable frame standard force sensor mounting seat 250; the movable frame work force sensor mounting seat 230 is fixedly mounted at the bottom of a certain movable frame connecting plate 260 of the movable frame body 210 and is positioned on a central line along the length direction of the movable frame body 210; the second moving frame spring piece mounting seat 240 includes a second right moving frame spring piece mounting seat and a second left moving frame spring piece mounting seat, and the second right moving frame spring piece mounting seat and the second left moving frame spring piece mounting seat are respectively and fixedly mounted on the rear end bottom surfaces of the right moving frame body 211 and the left moving frame body 212.
The loading measuring device comprises a first spring piece 310, a second spring piece 320, a loading mechanism 330, a standard force sensor 340 and a working force sensor 350; the first spring piece 310 includes a first right spring piece 311 and a first left spring piece 312, two ends of the first right spring piece 311 are fixedly connected with a first right fixed frame spring piece mounting seat 141 and a first right movable frame spring piece mounting seat respectively, and two ends of the first left spring piece 312 are fixedly connected with a first left fixed frame spring piece mounting seat 142 and a first left movable frame spring piece mounting seat respectively; the second spring piece 320 includes a second right spring piece 321 and a second left spring piece 322, two ends of the second right spring piece 321 are fixedly connected with the second right fixed frame spring piece mounting seat 171 and the second right movable frame spring piece mounting seat, and two ends of the second left spring piece 322 are fixedly connected with the second left fixed frame spring piece mounting seat 172 and the second left movable frame spring piece mounting seat; the loading mechanism 330 is fixedly mounted on a transverse plate of the front mounting seat 120, the standard force sensor 340 is fixedly mounted on a baffle plate at the front end of the movable frame body 210, and the loading mechanism 330 and the standard force sensor 340 are coaxially arranged and parallel to the central line of the base 110 along the length direction; two ends of the working force sensor 350 are fixedly connected with the fixed frame working force sensor mounting seat 150 and the movable frame working force sensor mounting seat 230 respectively, and the working force sensor 350 is coaxially arranged with the loading mechanism 330 and the standard force sensor 340; the loading mechanism 330 comprises a servo motor, a motor power supply, a hydraulic loading device and a calibration oil cylinder, wherein the motor power supply is electrically connected with the servo motor, the servo motor is sequentially connected with the hydraulic loading device and the calibration oil cylinder, and a piston of the calibration oil cylinder is connected with a standard force sensor.
The engine thrust measuring rack comprises a measuring section bracket for supporting a measuring section, the measuring section bracket comprises a first measuring section bracket 410 and a second measuring section bracket 420 which are coaxially arranged, and the first measuring section bracket 410 and the second measuring section bracket 420 have the same structure and are fixedly arranged on the top surface of the movable rack body 210; the measuring section bracket comprises a measuring section bracket 411, a measuring section bracket lower ring 412, a measuring section bracket upper ring 413, a measuring section bracket positioning mechanism 414 and a locking device 415; the bottom surface of the measuring section bracket 411 is fixedly connected with the top surface of the movable bracket body 210, the measuring section bracket lower ring 412 and the measuring section bracket upper ring 413 are both in semicircular structures, and the measuring section bracket lower ring 412 and the measuring section bracket upper ring 413 are connected to form a circle; the measuring section bracket lower ring 412 is integrally formed with the measuring section bracket 411; the number of the measuring section bracket positioning mechanisms 414 is 3, the structures are the same, and the measuring sections are used for positioning and measuring the air inlet parameters of the tested engine 1; the 3 measuring section bracket positioning mechanisms 414 are uniformly distributed along the radial direction of a circle formed by connecting the measuring section bracket lower ring 412 and the measuring section bracket upper ring 413, wherein one measuring section bracket positioning mechanism 414 is arranged at the top of the measuring section bracket upper ring 413, and the rest 2 measuring section bracket positioning mechanisms 414 are arranged on the measuring section bracket lower ring 412; the measuring section bracket positioning mechanism 414 comprises a positioning mechanism nut 4141, a positioning mechanism locking nut 4142 and a positioning mechanism screw 4143, wherein the positioning mechanism screw 4143 penetrates through the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413, the positioning mechanism locking nut 4142 is sleeved on the positioning mechanism screw 4143 and is arranged on the outer side of the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413 to be abutted with the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413, and is used for locking the positioning mechanism screw 4143, and the positioning mechanism screw 4141 is sleeved on the positioning mechanism screw 4143 and is abutted with the positioning mechanism locking nut 4142; the number of locking devices 415 is 2, and the structures are the same, the locking devices 415 for fixedly connecting the measuring section bracket lower ring 412 and the measuring section bracket upper ring 413,2 are disposed at the connecting ends of the measuring section bracket lower ring 412 and the measuring section bracket upper ring 413, the locking devices 415 comprise an upper locking plate 4151, a lower locking plate 4152, a locking bolt 4153 and a locking nut 4154, the upper locking plate 4151 is fixedly connected to the front end surface of the measuring section bracket upper ring 413, the lower surface of the upper locking plate 4151 coincides with the lower surface of the measuring section bracket upper ring 413, the lower locking plate 4152 is fixedly connected to the front end surface of the measuring section bracket lower ring 412, the upper surface of the lower locking plate 4152 coincides with the upper surface of the measuring section bracket lower ring 412, the locking bolt 4153 sequentially penetrates through the lower locking plate 4152 and the upper locking plate 4151, and the locking nut 4154 is matched with the locking bolt 4153 and is abutted to the upper locking plate 4151.
The engine thrust measurement rack comprises a locking device, the locking device comprises a fastening screw 510, a fastening baffle 520 and a fastening nut 530, the fastening screw 510 sequentially penetrates through the baffle at the rear end of the movable rack body 210, the fastening baffle 520, a vertical plate of the rear mounting seat 160 and the fastening nut 530, the fastening nut 530 is matched with the fastening screw 510, and the fastening baffle 520 and the fastening nut 530 are both in butt joint with the vertical plate of the rear mounting seat 160.
The engine thrust measuring rack comprises an engine mounting rack 600, wherein the engine mounting rack 600 comprises an engine mounting top rack 610, a left stand column 620, a right stand column 630, a front joint 640, a rear joint 650 and a lifting lug 660, which have the same structure; the bottom surfaces of the left column 620 and the right column 630 are detachably connected with the movable frame 200; the engine mounting top frame 610 is fixedly connected with the top surfaces of the left upright post 620 and the right upright post 630 to form a gantry, the front joint 640 and the rear joint 650 are detachably mounted on the engine mounting top frame 610, and the lifting lug 660 is fixedly connected with the engine mounting top frame 610; the engine mounting top frame 610 comprises a front beam 611, a rear beam 612 and a longitudinal beam 613, wherein the front beam 611 and the rear beam 612 are arranged in parallel and are fixedly connected with the longitudinal beam 613, the rear beam 612 is fixedly connected with one end of the longitudinal beam 613, and the front beam 611, the rear beam 612 and the longitudinal beam 613 form a shape like Chinese character 'tu'; the longitudinal beam 613 is provided with mounting holes 614 for mounting the front joint 640 and the rear joint 650; the left column 620 includes a front column 621, a rear column 622 and a column connecting rod 623, and the front column 621 and the rear column 622 are arranged in parallel and fixedly connected by a plurality of column connecting rods 623.
The engine thrust measuring rack comprises a force sensor calibration device, wherein the force sensor calibration device comprises an industrial personal computer, a display, a standard force sensor data acquisition device and a working force sensor data acquisition device; the industrial personal computer is respectively and electrically connected with the display and the servo motor, the standard force sensor data acquisition device is respectively and electrically connected with the standard force sensor and the industrial personal computer, and the working force sensor data acquisition device is respectively and electrically connected with the working force sensor and the industrial personal computer.
The method for measuring the engine thrust by using the engine test bed air inlet thrust measuring device to simulate the engine air inlet parameters comprises the following steps:
s100), mounting the test engine 1 and the measurement section 401
S110), passing the measuring section 401 for measuring the engine intake parameter through the first measuring section bracket 410 and the second measuring section bracket 420 in sequence, and placing the measuring section in the first measuring section bracket 410 and the second measuring section bracket 420;
s120), mounting the front joint 640 and the rear joint 650 to the side member 613 according to the suspension position of the engine 1 to be tested;
s130), mounting the tested engine 1 to the front joint 640 and the rear joint 650 after mounting the engine mount 600 to the movable mount body 210;
S140), adjusting the measuring section, connecting one end of the measuring section with the air inlet of the tested engine 1, and adjusting the positioning mechanism screw 4143 in the measuring section bracket positioning mechanism 414, so that the measuring section is coaxial with the engine air inlet, and then sequentially rotating the positioning mechanism lock nut 4142 and the positioning mechanism nut 4141 in the measuring section bracket positioning mechanism 414.
S200), dismounting and locking device
The fastening screw 510 is sequentially pulled out from the vertical plate of the rear mounting base 160, the fastening baffle 520, and the baffle at the rear end of the movable frame 210 by loosening the fastening nut 530, and then the fastening baffle 520 is taken out.
S300), determining a working force sensor error
S310), the industrial personal computer controls the servo motor to start to drive the hydraulic loading device to work, the hydraulic loading device drives the calibration oil cylinder to work, the piston of the calibration oil cylinder drives the standard force sensor 340 to displace and further drives the movable frame body 210 to displace, and force is applied to the working force sensor 350 in the process of displacing the movable frame body 210;
s320), the hydraulic loading device drives the calibration oil cylinder to work, and the loading force is unloaded to a zero value after the loading force is continuously applied to the standard force sensor 340 to a preset value; the standard force sensor data acquisition device and the working force sensor data acquisition device respectively acquire force values output by the standard force sensor 340 and the working force sensor 350 in the process of applying loading force and unloading loading force and feed the force values back to the industrial personal computer, and the display displays the force values output by the standard force sensor 340 and the working force sensor 350 acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device in the process of applying loading force and unloading loading force;
S330), drawing characteristic graphs of the standard force sensor 340 and the working force sensor 350 according to force values output by the standard force sensor 340 and the working force sensor 350, which are acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device and displayed by the display, in the process of applying loading force and unloading loading force; under the same loading force, the difference between the force value output by the working force sensor 350 acquired by the working force sensor data acquisition device and the force value output by the standard force sensor 340 acquired by the standard force sensor data acquisition device is the working force sensor error.
S400), simulation of engine intake parameters (for specific simulation methods see applicant' S prior application: application number: CN201811164300.8, name: engine test bed air inlet system
S410), adjusting an engine intake air supply pressure adjusting valve and an oxygen supply flow adjusting valve according to the intake air total pressure and the oxygen content of the first simulation state point, so that the total pressure and the oxygen content of the second medium passing through the outlet of the measuring section are the same as the intake air total pressure and the oxygen content of the first simulation state point.
S420), adjusting the alcohol supply flow regulating valve according to the total air inlet temperature of the first simulation state point, starting the igniter, igniting the alcohol to burn the alcohol, and exchanging heat between the burned alcohol and the second medium of the second medium channel in the first medium channel to enable the total air inlet temperature of the second medium passing through the outlet of the measuring section to be the same as the total air inlet temperature of the first simulation state point.
S430) adjusting the engine intake supply pressure adjusting valve according to the intake total pressure at the first simulation state point so that the total pressure of the second medium passing through the outlet of the measuring section is the same as the intake total pressure at the first simulation state point.
S500), a first state point simulation test and a measurement of the thrust of the tested engine at the state point
And (3) adjusting a fuel supply flow regulating valve of the engine according to the fuel demand of the first simulation state point of the engine, so that the fuel supplied by a fuel supply source is the same as the fuel demand of the first simulation state point of the engine, igniting the engine, performing an air inlet simulation test of the first simulation state point, and displaying the force value output by the working force sensor 350 acquired by the working force sensor data acquisition device by a display.
S600), N-th state point simulation test, and measuring thrust of tested engine at the state point
Respectively adjusting an oxygen supply flow regulating valve, an engine air inlet supply pressure regulating valve, an alcohol supply flow regulating valve and an engine fuel supply flow regulating valve to ensure that the total pressure and the total mild oxygen content of a second medium at an outlet of the measuring section are the same as those of an inlet air pressure and the total mild oxygen content of an Nth simulation state point, and the fuel supplied by a fuel supply source is the same as the fuel demand of the Nth simulation state point; wherein N is more than or equal to 2; starting an engine Nth state point air intake simulation test to the state point air intake simulation test and measuring thrust force measurement of the tested engine at the state point according to the method of step S500.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A method for measuring engine thrust by using an engine test bed air inlet thrust measuring device to simulate engine air inlet parameters is characterized in that,
the engine test bed air inlet thrust measuring device comprises an air inlet system, an engine thrust measuring rack and a simulation cabin; the engine thrust measuring rack is fixedly arranged in the simulation cabin, and the tested engine is arranged on the engine thrust measuring rack; the air inlet system is communicated with the tested engine;
The method comprises the following steps:
s100), mounting the tested engine and the measuring section
S110), sequentially passing a measuring section for measuring the air inlet parameter of the engine through a first measuring section bracket and a second measuring section bracket, and placing the measuring section in the first measuring section bracket and the second measuring section bracket;
s120), installing the front joint and the rear joint on an engine installation top frame according to the suspension position of the tested engine;
s130), mounting the tested engine on the front joint and the rear joint after mounting the tested engine mounting frame on the movable frame body;
s140), adjusting the measuring section, connecting one end of the measuring section with the air inlet of the tested engine, adjusting the bracket of the measuring section, and positioning the measuring section after the measuring section is coaxial with the air inlet of the engine;
s200), dismounting and locking device
Loosening the tightening nuts, sequentially tightening the baffle plates from the vertical plate of the rear mounting seat by the tightening screw rods, and taking out the tightening baffle plates after the baffle plates at the rear end of the movable frame body are pulled out;
s300), determining a working force sensor error
S310), the industrial personal computer controls the servo motor to start to drive the hydraulic loading device to work, the hydraulic loading device drives the calibration oil cylinder to work, the piston of the calibration oil cylinder drives the standard force sensor to displace and further drives the movable frame body to displace, and force is applied to the working force sensor in the process of displacing the movable frame body;
S320), the hydraulic loading device drives the calibration oil cylinder to work, and the loading force is unloaded to a zero value after the loading force is continuously applied to the standard force sensor to a preset value; the standard force sensor data acquisition device and the working force sensor data acquisition device respectively acquire force values output by the standard force sensor and the working force sensor in the process of applying loading force and unloading loading force and feed the force values back to the industrial personal computer, and the display displays the force values output by the standard force sensor and the working force sensor acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device in the process of applying loading force and unloading loading force;
s330), drawing characteristic graphs of the standard force sensor and the working force sensor according to force values output by the standard force sensor and the working force sensor, which are acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device and displayed by the display, in the process of applying loading force and unloading loading force; under the same loading force, the difference between the force value output by the working force sensor acquired by the working force sensor data acquisition device and the force value output by the standard force sensor acquired by the standard force sensor data acquisition device is the error of the working force sensor;
S400), simulating engine air inlet parameters
S410), adjusting an engine air inlet supply pressure adjusting valve and an oxygen supply flow adjusting valve according to the total air inlet pressure and the oxygen content of the simulation state point, so that the total pressure and the oxygen content of the second medium passing through the outlet of the measuring section are the same as the total air inlet pressure and the oxygen content of the simulation state point;
s420), adjusting the alcohol supply flow regulating valve according to the total air inlet temperature of the simulation state point, starting the igniter, igniting the alcohol to burn the alcohol, and exchanging heat between the burned alcohol and the second medium of the second medium channel in the first medium channel to enable the total air inlet temperature of the second medium passing through the outlet of the measuring section to be the same as the total air inlet temperature of the simulation state point;
s430), adjusting an engine air inlet supply pressure adjusting valve according to the air inlet total pressure of the simulation state point, so that the total pressure of the second medium passing through the outlet of the measuring section is the same as the air inlet total pressure of the simulation state point;
s500), a state point simulation test and a measurement of the thrust of the engine under test at the state point
And (3) adjusting a fuel supply flow regulating valve of the engine according to the fuel demand of the engine simulation state point to ensure that the fuel supplied by a fuel supply source is the same as the fuel demand of the engine simulation state point, igniting the engine, performing an air inlet simulation test of the simulation state point, and displaying the force value output by the working force sensor acquired by the working force sensor data acquisition device by a display.
2. The method according to claim 1, characterized in that: the air inlet system comprises a supply source and a temperature simulation unit; the supply sources include a fuel supply source, an oxygen supply source, an engine intake supply source, and an alcohol supply source.
3. The method according to claim 2, characterized in that: the temperature simulation unit comprises a pipe body and a shell, wherein the pipe body is positioned in the shell, a first medium channel is formed in the pipe body, and a second medium channel is formed in a space between the outer wall of the pipe body and the inner wall of the shell; the fuel oil supply source is communicated with the tested engine through a pipeline, the oxygen supply source and the engine air inlet supply source are respectively communicated with the inlet of the second medium channel through pipelines, the outlet of the second medium channel is communicated with the inlet of the straight section such as the inlet of the measuring section through a pipeline, the supersonic expansion section of the measuring section is communicated with the air inlet of the tested engine through a pipeline, the alcohol supply source is communicated with the inlet of the first medium channel through a pipeline after passing through the igniter, and the outlet of the first medium channel is communicated with the outside.
4. A method according to claim 3, characterized in that:
an engine fuel supply flow regulating valve and an engine fuel supply stop valve are arranged on a pipeline for communicating the fuel supply source with the tested engine;
An oxygen supply flow regulating valve and an oxygen supply stop valve are arranged on a pipeline which is communicated with the oxygen supply source and the inlet of the second medium channel;
an engine air inlet supply pressure regulating valve is arranged on a pipeline which is communicated with the engine air inlet supply source and the inlet of the second medium channel.
5. The method according to claim 1, characterized in that: the engine thrust measuring rack comprises a fixed rack, a movable rack and a loading measuring device; the loading measuring device comprises a spring piece, a loading mechanism and a working force sensor; the movable frame is hung on the fixed frame through a spring piece, the loading mechanism is fixedly arranged on the fixed frame, and two ends of the working force sensor are respectively connected with the fixed frame and the movable frame.
6. The method according to claim 5, wherein: the movable frame comprises a movable frame body, a first movable frame spring piece mounting seat, a movable frame working force sensor mounting seat, a second movable frame spring piece mounting seat and a movable frame standard force sensor mounting seat; along the length direction of the movable frame body, a movable frame standard force sensor mounting seat is fixedly arranged on the bottom surface of the front end of the movable frame body; the first movable frame spring piece mounting seat comprises 2 movable frame standard force sensor mounting seats which are fixedly arranged on the bottom surface of the front end of the movable frame body and are respectively positioned on two sides of the movable frame standard force sensor mounting seat; the movable frame working force sensor mounting seat is fixedly arranged at the bottom of the movable frame body and is positioned on a central line along the length direction of the movable frame body; the second movable frame spring piece mounting seat comprises 2 rear end bottom surfaces which are respectively and fixedly arranged on the movable frame body.
7. The method according to claim 6, wherein:
the fixed frame comprises a base, a front mounting seat, a loading mechanism mounting seat, a first fixed frame spring piece mounting seat, a fixed frame working force sensor mounting seat, a rear mounting seat and a second fixed frame spring piece mounting seat; the base is of a cuboid structure, the front mounting seat and the rear mounting seat are respectively and fixedly mounted at the front end and the rear end of the base along the length direction of the base, the rear mounting seat comprises a transverse plate and a vertical plate, and the transverse plate and the vertical plate form an L shape; the loading mechanism mounting seat is fixedly arranged on the front mounting seat, the number of the first fixed frame spring piece mounting seats is 2, and the first fixed frame spring piece mounting seats are fixedly arranged at the front end of the base and are respectively positioned at two sides of the front mounting seat; the fixed frame working force sensor mounting seat is fixedly arranged on the base and is positioned on a central line along the length direction of the base; the second fixed frame spring piece mount pad includes 2, fixed mounting at the rear end of base and be located back mount pad both sides respectively.
8. The method according to claim 7, wherein: the loading measuring device comprises a first spring piece, a second spring piece, a loading mechanism, a standard force sensor and a working force sensor; the two ends of each second spring piece are fixedly connected with a second fixed frame spring piece mounting seat and a second movable frame spring piece mounting seat respectively; the loading mechanism is fixedly arranged on a transverse plate of the front mounting seat, the standard force sensor is fixedly arranged on a baffle plate at the front end of the movable frame body, and the loading mechanism and the standard force sensor are coaxially arranged and parallel to the central line of the base along the length direction; the two ends of the working force sensor are fixedly connected with the fixed frame working force sensor mounting seat and the movable frame working force sensor mounting seat respectively, and the working force sensor, the loading mechanism and the standard force sensor are coaxially arranged.
9. The method according to claim 5, wherein: the loading mechanism comprises a servo motor, a motor power supply, a hydraulic loading device and a calibration oil cylinder, wherein the motor power supply is electrically connected with the servo motor, the servo motor is sequentially connected with the hydraulic loading device and the calibration oil cylinder, and a piston of the calibration oil cylinder is connected with the standard force sensor.
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| CN113218661A (en) * | 2021-04-07 | 2021-08-06 | 上海新力动力设备研究所 | Cold air thrust testing device for attitude and orbit control engine |
| CN113945387B (en) * | 2021-09-19 | 2023-11-28 | 中国航空工业集团公司西安飞机设计研究所 | Ground pulley test method for hair extension system |
| CN115014621B (en) * | 2022-05-26 | 2024-03-29 | 北京大学 | Thrust measuring device for ground test of continuous detonation engine |
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| CN110702292A (en) | 2020-01-17 |
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