Engine test bed air inlet thrust measuring device and using method thereof
阅读说明：本技术 发动机试验台进气推力测量装置及其使用方法 (Engine test bed air inlet thrust measuring device and using method thereof ) 是由 许海涛 王文彬 *** 于 2019-11-22 设计创作，主要内容包括：一种发动机试验台进气推力测量装置,包括定架,动架,加载测量装置和测量段；加载测量装置包括弹簧片,加载机构和工作力传感器；动架通过弹簧片悬挂在定架上；加载机构固定安装在定架上,工作力传感器两端分别连接定架和动架；所述测量段固定安装在动架上。本发明的发动机推力测量台架及其测量方法,实现了发动机推力的测量,结构简单。(An air inlet thrust measuring device of an engine test bed comprises a fixed frame, a movable frame, 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. The engine thrust measuring rack and the measuring method thereof realize the measurement of the engine thrust and have simple structure.)
1. The air inlet thrust measuring device of the engine test bed is characterized by comprising a fixed frame, a movable frame, 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.
2. The engine test stand inlet air thrust measuring device of claim 1, characterized in that: 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.
3. The engine test stand inlet air thrust measuring device of claim 2, characterized in that: 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 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.
4. The engine test stand inlet air thrust measurement device 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 test stand inlet air thrust measuring device of claim 1, characterized in that: 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 test stand inlet air thrust measuring device of claim 1, characterized in that: the measuring section comprises a measuring section bracket for supporting the measuring pipe section, the measuring section bracket comprises a first measuring section bracket and a second measuring section bracket which are coaxially arranged, the first measuring section bracket and the second measuring section bracket are fixedly arranged on the top surface of the movable frame body, 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.
7. The engine test stand inlet air thrust measuring device of claim 1, characterized in that: 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.
8. The engine test stand inlet air thrust measuring device of claim 1, characterized in that: 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.
9. The engine test stand inlet air thrust measuring device of claim 1, characterized in that: 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.
10. A method for measuring thrust of a tested engine by using the engine test stand inlet air thrust measuring device of any one of claims 1 to 9, characterized in that: the method comprises the following steps:
s100), installing the tested engine and measuring a pipe section
S110), sequentially enabling a measuring pipe section for measuring air inlet parameters of the engine to pass through a first measuring section bracket and a second measuring section bracket, and placing the measuring pipe section in the first measuring section bracket and the second measuring section bracket;
s120), mounting the front joint and the rear joint on an engine mounting top frame according to the suspension position of the tested engine;
s130), mounting the engine to be tested on the front joint and the rear joint after mounting the engine mounting frame on the movable frame body;
s140), adjusting a measuring section, namely, after one end of the measuring pipe section is connected with an air inlet of the tested engine, adjusting a bracket of the measuring section to enable the measuring pipe section to be coaxial with the air inlet of the tested engine, and then positioning the measuring pipe section;
s200), disassembling and locking device
Loosening the fastening nut, pulling out the fastening screw from the vertical plate of the rear mounting seat, fastening the baffle plate and the baffle plate at the rear end of the movable frame body in sequence, and taking out the fastening baffle plate;
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 to displace so as to drive the movable frame body to displace, and force is applied to the working force sensor in the process that the movable frame body displaces;
s320), the hydraulic loading device drives the calibration oil cylinder to work, and after loading force is continuously applied to the standard force sensor to a preset value, the loading force is unloaded to a zero 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 loading force applying and unloading processes 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 in the loading force applying and unloading processes, wherein the force values 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 and the working force sensor according to force values output by the standard force sensor and the working force sensor in the loading force applying and unloading processes, wherein the standard force sensor and the working force sensor 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 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 working force sensor error;
s400), measuring thrust of tested engine
The tested engine is ignited, after the measuring section detects that the air inlet parameter of the tested engine reaches the working condition, the display displays the force value output by the working force sensor and collected by the working force sensor data collecting device.
Technical Field
The invention relates to the technical field of thrust measurement, in particular to an air inlet thrust measurement device of an engine test bed and a using method 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 air inlet thrust measuring device of the engine test bed and the using method thereof are provided.
The technical solution of the invention is as follows: an air inlet thrust measuring device of an engine test bed comprises a fixed frame, a movable frame, 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.
Further, 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 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.
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, the first measurement section bracket and the second measurement section bracket are fixedly arranged on the top surface of the movable frame body, the measurement pipe section is a laval nozzle or a straight pipe section, and a temperature sensor and a pressure sensor are arranged in the measurement pipe section.
Further, engine test bench air inlet thrust measuring device, including locking device, 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 tight set screw cooperation, tight set baffle and tight set nut all with the riser butt of back mount pad.
Further, the air inlet thrust measuring device of the engine test bed comprises an engine mounting frame, wherein the engine mounting frame comprises an engine mounting top frame, a left upright post and a right upright post which are identical in structure, a front joint and a rear joint; 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.
Further, the engine test bed air inlet thrust measuring 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.
The method for measuring the thrust of the tested engine by using the air inlet thrust measuring device of the engine test bed as claimed in the claim comprises the following steps:
s100), installing the tested engine and measuring a pipe section
S110), sequentially enabling a measuring pipe section for measuring air inlet parameters of the engine to pass through a first measuring section bracket and a second measuring section bracket, and placing the measuring pipe section in the first measuring section bracket and the second measuring section bracket;
s120), mounting the front joint and the rear joint on an engine mounting top frame according to the suspension position of the tested engine;
s130), mounting the engine to be tested on the front joint and the rear joint after mounting the engine mounting frame on the movable frame body;
s140), adjusting a measuring section, namely, after one end of the measuring pipe section is connected with an air inlet of the tested engine, adjusting a bracket of the measuring section to enable the measuring pipe section to be coaxial with the air inlet of the tested engine, and then positioning the measuring pipe section;
s200), disassembling and locking device
Loosening the fastening nut, pulling out the fastening screw from the vertical plate of the rear mounting seat, fastening the baffle plate and the baffle plate at the rear end of the movable frame body in sequence, and taking out the fastening baffle plate;
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 to displace so as to drive the movable frame body to displace, and force is applied to the working force sensor in the process that the movable frame body displaces;
s320), the hydraulic loading device drives the calibration oil cylinder to work, and after loading force is continuously applied to the standard force sensor to a preset value, the loading force is unloaded to a zero 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 loading force applying and unloading processes 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 in the loading force applying and unloading processes, wherein the force values 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 and the working force sensor according to force values output by the standard force sensor and the working force sensor in the loading force applying and unloading processes, wherein the standard force sensor and the working force sensor 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 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 working force sensor error;
s400), measuring thrust of tested engine
The tested engine is ignited, after the measuring section detects that the air inlet parameter of the tested engine reaches the working condition, the display displays the force value output by the working force sensor and collected by the working force sensor data collecting device.
Compared with the prior art, the invention has the advantages that:
1. the air inlet thrust measuring device of the engine test bed and the using method thereof realize the measurement of the thrust of the engine and have simple structure.
2. The air inlet thrust measuring device of the engine test bed and the using method thereof 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 the air inlet thrust measuring device is simple and easy to implement.
3. According to the air inlet thrust measuring device of the engine test bed and the using method thereof, the measuring section bracket is arranged to ensure that the measuring section for measuring the air inlet parameters of the tested engine is coaxial with the engine, so that the air inlet simulation precision of the engine is ensured, and the air inlet parameter measuring precision of the engine is improved.
4. According to the air inlet thrust measuring device for the engine test bed and the using method thereof, 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.
5. According to the air inlet thrust measuring device for the engine test bed and the using method thereof, the horizontal base is arranged on the fixed frame, so that the bearing capacity of the whole fixed frame is improved.
6. The air inlet thrust measuring device of the engine test bed and the use method thereof have the advantages that the locking state is set, so that the movable frame and the fixed frame are kept in a fixed state when the engine is in an untested state or is installed before testing, the service life of the engine thrust measuring bed 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 in the movable frame in an own state (the locking state is not used) is avoided, and the precision of the engine thrust measuring bed is ensured.
7. According to the air inlet thrust measuring device of the engine test bed and the using method thereof, the gantry type engine mounting frame is adopted, 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 is provided with one engine mounting frame in the past is solved.
8. The invention relates to an air inlet thrust measuring device of an engine test bed and a using method thereof.A standard force sensor is adopted to determine the error of the working force sensor and carry out static calibration, thereby generating a group of high-precision known 'simulated thrust' to determine the degree of a force measuring system.
9. According to the engine test bed air inlet thrust measuring device and the using method thereof, 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 test stand intake thrust measurement device according to an embodiment of the present invention.
FIG. 2 is a front view of the structure of an engine test stand intake thrust measurement device according to another embodiment of the invention.
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 structure of an engine thrust measuring rack in the intake thrust measuring device of the engine test stand of 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 engine test stand air intake thrust measurement device of 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 an engine mount in the intake thrust measuring device of the engine test stand according to the present invention.
Fig. 11 is a structural side view of an engine mount in the engine test stand intake thrust measuring device of the present invention.
Fig. 12 is a schematic structural view of an engine mounting upper frame in the engine test stand intake thrust measuring device of the present invention.
Fig. 13 is a schematic diagram illustrating the principle of force sensor calibration in the intake thrust measurement device of the engine test stand 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.
An engine thrust measuring rack comprises a fixed
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 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.
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
Preferably, a temperature sensor and a pressure sensor are arranged in the measuring
The engine thrust measuring rack comprises a locking device, the locking device comprises a
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
S110), sequentially enabling a measuring section for measuring engine air inlet parameters to pass through the first
s120), mounting the front joint 640 and the rear joint 650 to the
s130), mounting the
s140) adjusting the measuring
S200), disassembling and locking device
The
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
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
s330), drawing characteristic curve graphs of the
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
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.