CN110763469A - Engine test bed thrust measurement decides frame and thrust measurement rack thereof - Google Patents
Engine test bed thrust measurement decides frame and thrust measurement rack thereof Download PDFInfo
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- CN110763469A CN110763469A CN201911158984.5A CN201911158984A CN110763469A CN 110763469 A CN110763469 A CN 110763469A CN 201911158984 A CN201911158984 A CN 201911158984A CN 110763469 A CN110763469 A CN 110763469A
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- mounting seat
- force sensor
- movable frame
- spring piece
- engine
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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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
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0038—Force sensors associated with force applying means applying a pushing force
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
A thrust measurement fixed frame of an engine test bed is characterized in that a base is of a cuboid structure, a front mounting seat and a rear mounting seat are fixedly mounted at the front end and the rear end of the base respectively 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 seats are fixedly mounted on the front mounting seat, the number of the first fixing frame spring piece mounting seats is 2, and the first fixing frame spring piece mounting seats are fixedly mounted at the front end of the base and are respectively positioned on 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 mounting seat comprises 2 spring pieces which are fixedly mounted at the rear end of the base and are respectively positioned on two sides of the rear mounting seat. The thrust measurement fixed frame of the engine test bed is provided with the horizontal base, so that the bearing capacity of the whole fixed frame is improved.
Description
Technical Field
The invention relates to the technical field of thrust measurement, in particular to a thrust measurement fixed frame of an engine test bed and a thrust measurement rack thereof.
Background
The engine test and test technology is an important component of the solid propulsion technology, and the thrust measurement is an important parameter to be measured in the engine test and test. To study engine thrust, numerous trial and error tests are required, which are not possible if all are put into flight tests. The main reasons are high flight test cost, long period, small information yield, risk and large manpower consumption. The engine ground test is to perform static test on the system according to specific conditions and environmental requirements on the ground to obtain various performance index information describing the system so as to solve the key problem in the engine thrust test process.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the engine test bed thrust measurement fixed frame and the thrust measurement rack thereof are provided.
The technical solution of the invention is as follows: a thrust measurement fixed frame of an engine test bed 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 fixedly mounted at the front end and the rear end of the base respectively 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 seats are fixedly mounted on the front mounting seat, the number of the first fixing frame spring piece mounting seats is 2, and the first fixing frame spring piece mounting seats are fixedly mounted at the front end of the base and are respectively positioned on 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 mounting seat comprises 2 spring pieces which are fixedly mounted at the rear end of the base and are respectively positioned on two sides of the rear mounting seat.
Further, the engine thrust measuring rack comprising the engine test bed thrust measuring fixed rack comprises a movable rack, a loading measuring device and a measuring section; 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 the 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; the measuring section is fixedly arranged on the movable frame.
Further, 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; the movable frame standard force sensor mounting seat is fixedly mounted on the bottom surface of the front end of the movable frame body along the length direction of the movable frame body; the first movable frame spring piece mounting seat comprises 2 fixed mounting seats which are fixedly mounted 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 mounted 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 spring pieces which are respectively fixedly mounted on the bottom surface of the rear end of the movable frame body.
Furthermore, 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 number of the first spring pieces is 2, each first spring piece is fixedly connected with a first fixed frame spring piece mounting seat and a first movable frame spring piece mounting seat, the number of the second spring pieces is 2, and 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 are parallel to the central line of the base along the length direction; the two ends of the working force sensor are respectively and fixedly connected with the fixed frame working force sensor mounting seat and the movable frame working force sensor mounting seat, and the working force sensor, the loading mechanism and the standard force sensor are coaxially arranged.
Furthermore, 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.
Further, the measurement section comprises a measurement section bracket for supporting the measurement pipe section, the measurement section bracket comprises a first measurement section bracket and a second measurement section bracket which are coaxially arranged, and the first measurement section bracket and the second measurement section bracket are fixedly arranged on the top surface of the movable frame body.
Furthermore, the measuring pipe section is a Laval nozzle or a straight pipe section, and a temperature sensor and a pressure sensor are arranged in the measuring pipe section.
Further, engine thrust measures rack includes locking device, and locking device includes tight set screw, tight set baffle and tight set nut, and tight set screw passes movable frame support body rear end baffle in proper order, tight set baffle, the riser and the tight set nut of back mount pad, tight set nut and the cooperation of tight set screw, tight set baffle and tight set nut all with the riser butt of back mount pad.
Further, the engine thrust measuring rack comprises an engine mounting rack, and the engine mounting rack comprises an engine mounting top frame, a left upright column, a right upright column, a front joint and a rear joint which are identical in structure; the bottom surfaces of the left upright post and the right upright post are detachably connected with the movable frame; the engine mounting top frame is fixedly connected with the top surfaces of the left upright post and the right upright post to form a gantry type, and the front joint and the rear joint are detachably mounted on the engine mounting top frame; and the engine mounting top frame is provided with mounting holes for mounting the front joint and the rear joint.
Furthermore, the engine thrust measurement rack comprises a force sensor calibration device, and 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 electrically connected with the display and the servo motor, the standard force sensor data acquisition device is respectively electrically connected with the standard force sensor and the industrial personal computer, and the working force sensor data acquisition device is respectively electrically connected with the working force sensor and the industrial personal computer.
Compared with the prior art, the invention has the advantages that:
1. the thrust measurement fixed frame of the engine test bed is provided with the horizontal base, so that the bearing capacity of the whole fixed frame is improved.
2. The thrust measuring fixed frame and the thrust measuring rack of the engine test bed realize the measurement of the thrust of the engine and have simple structures.
3. The thrust measuring fixed frame and the thrust measuring rack of the engine test bed skillfully hang the movable frame on the fixed frame through the spring piece and measure the thrust of the engine by assisting the force sensor, and are simple and easy to implement.
4. The thrust measurement fixed frame and the thrust measurement rack of the engine test bed are provided with the measurement section bracket to ensure that the measurement 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.
5. According to the thrust measurement fixed frame and the thrust measurement rack of the engine test bed, the overall rigidity of the movable frame is higher, stress elements are reasonably distributed on the design in order to ensure the dynamic performance of the test frame, the principle of equal strength of the structure is adopted, the stress-free parts of materials are removed, and the like, so that the optimized design is realized, and the mass of the movable frame is reduced.
6. The thrust measuring fixed frame and the thrust measuring rack of the engine test bed are provided with the locking state, so that the movable frame and the fixed frame are kept in the fixed state when the engine is in an untested state or is installed before testing, the service life of the thrust measuring rack of the engine is prolonged, the irreversible external force applied to the spring piece or even damage to the spring piece when the engine and related testing pieces are installed under the self-existing state (the locking state is not used) of the movable frame is avoided, and the precision of the thrust measuring rack of the engine is ensured.
7. According to the thrust measurement fixed frame and the thrust measurement rack of the engine test bed, the gantry engine mounting frame is adopted to suspend the engine, so that the measurement precision of the thrust of the engine 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 is provided with one engine mounting frame in the prior art is solved.
8. The engine test bed thrust measurement fixed frame and the thrust measurement rack thereof adopt the standard force sensor to carry out error determination and static calibration on the working force sensor, thereby generating a group of high-precision known 'simulated thrust' to carry out the degree determination on a force measurement system.
9. According to the thrust measurement fixing frame and the thrust measurement rack of the engine test bed, the characteristic curve 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 used for accurately determining the true value of the force through the characteristic curve graphs, the calibration of the working force sensor in each test is avoided, the cost is low, and the efficiency is high.
Drawings
FIG. 1 is a front view of an engine thrust stand incorporating the engine test stand thrust measurement fixture of the present invention in an exemplary embodiment.
FIG. 2 is a front view of an engine thrust stand incorporating the engine test stand thrust measurement fixture of the present invention in another embodiment.
Fig. 3 is an enlarged view of a portion a in fig. 1 or 2.
Fig. 4 is an enlarged view of a portion B in fig. 1 or 2.
Fig. 5 is a top view of the engine thrust measuring rack of the engine test stand and the thrust measuring rack thereof according to the present invention.
Fig. 6 is an enlarged view of the portion C of fig. 5.
Fig. 7 is a schematic structural diagram of a measurement section bracket in the thrust measurement fixed frame and the thrust measurement rack of the engine test stand according to the present invention.
Fig. 8 is an enlarged view of a portion D in fig. 7.
Fig. 9 is an enlarged view of a portion E of fig. 7.
Fig. 10 is a front view of the structure of an engine mounting bracket in the thrust measuring stationary frame and the thrust measuring rack of the engine test stand according to the present invention.
Fig. 11 is a side view of the engine mounting bracket in the thrust measuring rack of the engine test stand and the thrust measuring rack thereof according to the present invention.
Fig. 12 is a schematic structural view of an engine mounting top frame in the thrust measuring stationary frame and the thrust measuring rack thereof of the engine test stand according to the present invention.
Fig. 13 is a schematic diagram of the principle of force sensor calibration in the thrust measuring rack of the engine test stand and the thrust measuring rack thereof according to the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "abutted" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A thrust measurement fixed frame of an engine test bed comprises a base 110, a front mounting seat 120, a loading mechanism mounting seat 130, a first fixed frame spring leaf mounting seat 140, a fixed frame working force sensor mounting seat 150, a rear mounting seat 160 and a second fixed frame spring leaf mounting seat 170; the base 110 is of a cuboid structure, 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 leaf mounting seat 140 includes a first right fixed frame spring leaf mounting seat 141 and a first left fixed frame spring leaf mounting seat 142, and the first right fixed frame spring leaf mounting seat 141 and the first left fixed frame spring leaf mounting seat 142 are fixedly mounted at the front end of the base 110 and are respectively located on two sides of the front mounting seat 120; the fixed frame working force sensor mounting seat 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 respectively located at two sides of the rear mounting seat 160.
An engine thrust measuring rack comprising the engine test bed thrust measuring fixed rack comprises a fixed rack 100, a movable rack 200, a loading measuring device and a measuring section 400; 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, two ends of the working force sensor 350 are respectively connected with the fixed frame 100 and the movable frame 200, and the measuring section 400 is fixedly installed on the movable frame 200.
The movable frame 200 comprises a movable frame body 210, a first movable frame spring piece mounting seat 220, a movable frame working force sensor mounting seat 230, a second movable frame spring piece mounting seat 240 and a movable frame standard force sensor mounting seat 250, wherein the movable frame body 210 comprises 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, both of which are cuboid structures and are parallel to the base 110, the central line of the right movable frame body 211 and the left movable frame body 212 in the length direction is parallel to the central line of the base 110 in the length direction, the right movable frame body 211 and the left movable frame body 212 are symmetrically arranged relative to the central line of the base 110 in the length direction, the number of the movable frame connecting plates 260 is multiple, and the right movable frame body 211 and the left movable frame body 212 are fixedly connected by the plurality of the movable frame connecting plates 260; 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 moving frame spring piece mounting seat 220 comprises a first right moving frame spring piece mounting seat and a first left moving frame spring piece mounting seat, and the first right moving frame spring piece mounting seat and the first left moving frame spring piece mounting seat are respectively fixedly mounted on the bottom surfaces of the front ends of the right moving frame body 211 and the left moving frame body 212 and are respectively positioned on two sides of the moving frame standard force sensor mounting seat 250; the movable frame working force sensor mounting base 230 is fixedly mounted at the bottom of one movable frame connecting plate 260 of the movable frame body 210 and is located on a central line along the length direction of the movable frame body 210; the second moving frame spring piece mounting seat 240 comprises 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 fixedly mounted on the bottom surfaces of the rear ends of the right moving frame body 211 and the left moving frame body 212 respectively.
The loading measuring device comprises a first spring plate 310, a second spring plate 320, a loading mechanism 330, a standard force sensor 340 and a working force sensor 350; the first spring piece 310 comprises a first right spring piece 311 and a first left spring piece 312, two ends of the first right spring piece 311 are respectively and fixedly connected with a first right fixed frame spring piece mounting seat 141 and a first right movable frame spring piece mounting seat, and two ends of the first left spring piece 312 are respectively and fixedly connected with a first left fixed frame spring piece mounting seat 142 and a first left movable frame spring piece mounting seat; the second spring piece 320 comprises 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 respectively, 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 respectively; 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 are parallel to the central line of the base 110 along the length direction; two ends of the working force sensor 350 are respectively and fixedly connected with the fixed frame working force sensor mounting seat 150 and the movable frame working force sensor mounting seat 230, and the working force sensor 350, the loading mechanism 330 and the standard force sensor 340 are coaxially arranged; 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 measuring section 400 comprises a measuring section bracket for supporting the measuring pipe section 401, 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 both fixedly installed on the top surface of the movable frame 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 measurement section bracket 411 is fixedly connected with the top surface of the movable frame body 210, the measurement section bracket lower ring 412 and the measurement section bracket upper ring 413 are both of a semicircular structure, and the measurement section bracket lower ring 412 and the measurement section bracket upper ring 413 are connected to form a circle; the measuring section bracket lower ring 412 and the measuring section bracket 411 are integrally formed; the number of the measuring section bracket positioning mechanisms 414 is 3, the structures of the measuring section bracket positioning mechanisms are the same, the measuring section bracket positioning mechanisms 401 are used for positioning and measuring the air intake parameters of the tested engine, 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, the positioning mechanism screw 4143 passes 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, is arranged on the outer side of the measuring section bracket lower ring 412 or the measuring section bracket upper ring 413 and is abutted against 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 nut 4141 is sleeved on the positioning mechanism screw 4143 and is abutted against the positioning mechanism locking nut 4142; the number of the locking devices 415 is 2, and the structures of the locking devices are the same, and the locking devices 415 are used for fixedly connecting the lower ring 412 of the measurement section bracket and the upper ring 413 of the measurement section bracket, 2 locking devices 415 are arranged at the connecting ends of the lower ring 412 of the measurement section bracket and the upper ring 413 of the measurement section bracket, the locking device 415 includes 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 attached to the front end surface of the upper ring 413 of the measurement section bracket, the lower surface of the upper locking plate 4151 coincides with the lower surface of the upper ring 413 of the measurement section bracket, the lower locking plate 4152 is fixedly attached to the front end surface of the measuring section bracket lower ring 412, the upper surface of the lower lock plate 4152 coincides with the upper surface of the measuring section bracket lower ring 412, the locking bolt 4153 passes through the lower and upper locking plates 4152 and 4151 in sequence, the lock nut 4154 is engaged with the lock bolt 4153 and abuts against the upper lock plate 4151.
Preferably, the measuring pipe section 401 is a laval nozzle or a straight pipe section. When the air inlet parameter of the tested engine 1 is supersonic speed or sonic speed, the measuring pipe section 401 is a laval nozzle, and the specific structural form of the laval nozzle is referred to in the prior application of the applicant (application number: CN201811164305.0, invention name: an air inlet system of a supersonic engine test bed), specifically referring to the attached drawing 1; when the intake parameter of the engine 1 to be tested is subsonic, the measurement pipe section 401 is a straight pipe section, see fig. 2 in particular.
Preferably, a temperature sensor and a pressure sensor are arranged in the measuring pipe section 401, and both the temperature sensor and the pressure sensor are arranged in the direction facing the airflow and are used for measuring the total pressure and the total temperature of the cross section of the sensor.
The engine thrust measuring rack comprises a locking device, the locking device comprises a fastening screw rod 510, a fastening baffle 520 and a fastening nut 530, the fastening screw rod 510 sequentially penetrates through a rear end baffle of the movable rack body 210, the fastening baffle 520, a vertical plate and a fastening nut 530 of the rear mounting seat 160, the fastening nut 530 is matched with the fastening screw rod 510, and the fastening baffle 520 and the fastening nut 530 are both abutted to 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 upright column 620 and a right upright column 630 which are identical in structure, a front joint 640, a rear joint 650 and a lifting lug 660; the bottom surfaces of the left upright post 620 and the right upright post 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 column 620 and the right upright column 630 to form a gantry type, 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 the Chinese character 'tu'; the longitudinal beam 613 is provided with a mounting hole 614 for mounting a front joint 640 and a rear joint 650; the left upright post 620 comprises a front post 621, a rear post 622 and upright post connecting rods 623, wherein the front post 621 and the rear post 622 are arranged in parallel and are fixedly connected through the upright post connecting rods 623.
The engine thrust measurement rack comprises a force sensor calibration device, and 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 electrically connected with the display and the servo motor, the standard force sensor data acquisition device is respectively electrically connected with the standard force sensor and the industrial personal computer, and the working force sensor data acquisition device is respectively electrically connected with the working force sensor and the industrial personal computer.
A method of measuring thrust of a subject engine using the engine thrust measurement rig, comprising the steps of:
s100), installing the engine 1 under test and measuring the pipe section 401
S110), sequentially enabling a measuring section for measuring engine air inlet parameters to pass through the first measuring section bracket 410 and the second measuring section bracket 420, 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 longitudinal beam 613 according to the suspension position of the engine 1 under test;
s130), mounting the engine mounting frame 600 on the movable frame body 210, and then mounting the tested engine 1 on the front joint 640 and the rear joint 650;
s140) adjusting the measuring pipe section 401, connecting one end of the measuring pipe section 401 with the air inlet of the tested engine 1, adjusting the positioning mechanism screw 4143 in the measuring section bracket positioning mechanism 414, enabling the measuring pipe section 401 to be coaxial with the air inlet of the tested engine 1, and then sequentially rotating the positioning mechanism locking nut 4142 and the positioning mechanism nut 4141 in the measuring section bracket positioning mechanism 414.
S200), disassembling and locking device
The fastening nut 530 is loosened, the fastening screw 510 is pulled out from the vertical plate of the rear mounting seat 160, the fastening baffle 520 and the baffle at the rear end of the movable frame body 210 in sequence, and then the fastening baffle 520 is taken out.
S300), determining the error of the working force sensor
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, a piston of the calibration oil cylinder drives the standard force sensor 340 to displace so as to drive the movable frame body 210 to displace, and force is applied to the working force sensor 350 in the displacement process of 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 loading force applying and unloading processes and feed back the force values 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 in the loading force applying and unloading processes, which are acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device;
s330), drawing characteristic curve 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 in the process of applying loading force and unloading loading force, wherein the force values are displayed by a display and acquired by the standard force sensor data acquisition device and the working force sensor data acquisition device; 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), measuring the thrust of the tested engine 1
The tested engine 1 is ignited, after the temperature and the total pressure of the tested engine detected by the temperature sensor and the pressure sensor in the measuring pipe section 401 reach working conditions, the display displays the force value output by the working force sensor 350 and collected by the working force sensor data collecting device.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A thrust measurement fixed frame of an engine test bed is characterized by comprising 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 fixedly mounted at the front end and the rear end of the base respectively 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 seats are fixedly mounted on the front mounting seat, the number of the first fixing frame spring piece mounting seats is 2, and the first fixing frame spring piece mounting seats are fixedly mounted at the front end of the base and are respectively positioned on 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 mounting seat comprises 2 spring pieces which are fixedly mounted at the rear end of the base and are respectively positioned on two sides of the rear mounting seat.
2. An engine thrust measuring rack comprising the engine test stand thrust measuring stationary frame of claim 1, characterized by comprising a movable frame, a load measuring device and a measuring section; 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 the 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; the measuring section is fixedly arranged on the movable frame.
3. The engine thrust measurement bench of claim 2, 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; the movable frame standard force sensor mounting seat is fixedly mounted on the bottom surface of the front end of the movable frame body along the length direction of the movable frame body; the first movable frame spring piece mounting seat comprises 2 fixed mounting seats which are fixedly mounted 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 mounted 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 spring pieces which are respectively fixedly mounted on the bottom surface of the rear end of the movable frame body.
4. The engine thrust measurement bench of claim 3, 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 number of the first spring pieces is 2, each first spring piece is fixedly connected with a first fixed frame spring piece mounting seat and a first movable frame spring piece mounting seat, the number of the second spring pieces is 2, and 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 are parallel to the central line of the base along the length direction; the two ends of the working force sensor are respectively and fixedly connected with the fixed frame working force sensor mounting seat and the movable frame working force sensor mounting seat, and the working force sensor, the loading mechanism and the standard force sensor are coaxially arranged.
5. The engine thrust measurement bench of claim 2, 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 a standard force sensor.
6. The engine thrust measurement bench of claim 2, wherein: the measurement section comprises a measurement section bracket for supporting the measurement pipe section, the measurement section bracket comprises a first measurement section bracket and a second measurement section bracket which are coaxially arranged, and the first measurement section bracket and the second measurement section bracket are fixedly arranged on the top surface of the movable frame body.
7. The engine thrust measurement bench of claim 6, wherein: the measuring pipe section is a Laval nozzle or a straight pipe section, and a temperature sensor and a pressure sensor are arranged in the measuring pipe section.
8. The engine thrust measurement bench of claim 2, wherein: including locking device, locking device includes tight set screw, tight set baffle and tight set nut, and tight set screw passes in proper order and moves a support body rear end baffle, tight set baffle, the riser and the tight set nut of back mount pad, tight set nut and the cooperation of tight set screw, tight set baffle and tight set nut all with the riser butt of back mount pad.
9. The engine thrust measurement bench of claim 2, wherein: the engine mounting frame comprises an engine mounting top frame, a left upright post, a right upright post, a front joint and a rear joint which are identical in structure; the bottom surfaces of the left upright post and the right upright post are detachably connected with the movable frame; the engine mounting top frame is fixedly connected with the top surfaces of the left upright post and the right upright post to form a gantry type, and the front joint and the rear joint are detachably mounted on the engine mounting top frame; and the engine mounting top frame is provided with mounting holes for mounting the front joint and the rear joint.
10. The engine thrust measurement bench of claim 2, wherein: the device 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 electrically connected with the display and the servo motor, the standard force sensor data acquisition device is respectively electrically connected with the standard force sensor and the industrial personal computer, and the working force sensor data acquisition device is respectively electrically connected with the working force sensor and the industrial personal computer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911158984.5A CN110763469A (en) | 2019-11-22 | 2019-11-22 | Engine test bed thrust measurement decides frame and thrust measurement rack thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911158984.5A CN110763469A (en) | 2019-11-22 | 2019-11-22 | Engine test bed thrust measurement decides frame and thrust measurement rack thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485012A (en) * | 2020-11-13 | 2021-03-12 | 东北大学 | Solid rocket engine experiment table and stress testing method |
| CN114166510A (en) * | 2021-10-20 | 2022-03-11 | 中国航发四川燃气涡轮研究院 | Measuring device for transverse rigidity of force measuring assembly |
-
2019
- 2019-11-22 CN CN201911158984.5A patent/CN110763469A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485012A (en) * | 2020-11-13 | 2021-03-12 | 东北大学 | Solid rocket engine experiment table and stress testing method |
| CN114166510A (en) * | 2021-10-20 | 2022-03-11 | 中国航发四川燃气涡轮研究院 | Measuring device for transverse rigidity of force measuring assembly |
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