Range online switching thrust measurement bench

Abstract

The application provides a thrust measuring bench with on-line switching of ranges, comprising: a fixed frame fixed on a base surface, wherein a convex part is arranged in the middle of the fixed frame and faces upward; a movable frame in sliding connection with the fixed frame, wherein a first accommodating space and a second accommodating space are symmetrically arranged relative to the convex part between the movable frame and the fixed frame; a plurality of sets of thrust calibration components arranged in the first accommodating space; and a plurality of sets of thrust measuring components arranged in the second accommodating space. In the process of high-altitude simulation test of an engine, according to the size of the test thrust of the engine, the application can automatically switch the thrust sensor that meets the range and conforms to the measurement accuracy, so as to realize high-precision measurement of the thrust in the full package line range of the engine.

Description

Technical Field

[0001] This specification relates to the field of engine testing technology, specifically to a thrust measurement bench with online range switching. Background Technology

[0002] Thrust is one of the most important performance parameters in engine design and development, and also the most complex test parameter in high-altitude engine simulation tests. Developed Western countries have achieved significant results in the fundamental theories, engineering practices, and standards for thrust calibration and correction on engine test benches. As early as the 1960s, the United States published an aerospace data report, "Some Analysis and Recommendations on Improving the Calibration of Turbine Engine Test Benches," which provided a relatively systematic and clear description of engine test bench calibration and thrust correction, including the calibration of test bench equipment, correction of engine performance parameters, and the impact of the test bench on thrust measurement.

[0003] In China, the GJB241A-2010 "General Specification for Aircraft Turbine Jet and Turbofan Engines" stipulates that the accuracy of steady-state thrust measurement should be "±0.5% of the measured value for intermediate states and below, and ±0.5% of the value for minimum afterburner states and above".

[0004] During high-altitude engine simulation tests, the engine thrust varies greatly, ranging from hundreds to tens of thousands of kilograms. If the current thrust testing method uses a single fixed-range sensor, the measurement accuracy drops drastically at low thrust conditions. Therefore, it is necessary to optimize this testing method and design a wide-range, high-precision thrust measurement bench with online range switching. This bench would allow for automatic switching between different thrust sensors while the engine is running in the high-altitude cabin. This would address the shortcomings in thrust measurement across the entire engine thrust envelope, particularly in high-altitude low-speed tests, improving the accuracy of wide-range, large-span thrust measurements in high-altitude simulation tests and providing accurate and reliable data for engine performance evaluation. Summary of the Invention

[0005] In view of this, the embodiments of this specification provide a thrust measurement stand with online range switching in order to improve measurement accuracy.

[0006] The specific technical solution of the present invention is as follows: a thrust measurement bench with online range switching, comprising: a fixed frame, fixed on a base surface, with an upward protrusion in the middle of the fixed frame; a movable frame, slidably connected to the fixed frame, with a first accommodating space and a second accommodating space symmetrically arranged between the movable frame and the fixed frame relative to the protrusion; multiple sets of thrust calibration components, disposed in the first accommodating space; and multiple sets of thrust measurement components, disposed in the second accommodating space.

[0007] Furthermore, the thrust calibration assembly includes: a calibration thrust sensor, mounted on the moving frame and positioned opposite the protrusion; a first calibration rod, one end of which is fixedly connected to the calibration thrust sensor, and the other end of which is fixedly fitted with a sleeve; a calibration hydraulic cylinder, fixed to the protrusion; and a second calibration rod, one end of which is connected to the drive end of the calibration hydraulic cylinder, and the other end of which is connected to the sleeve, and in the direction of the connection between the calibration hydraulic cylinder and the calibration thrust sensor, the other end of the second calibration rod can be disengaged from the sleeve.

[0008] Furthermore, the thrust measurement assembly includes: a hydraulic clamp, mounted on the moving frame and positioned opposite the protrusion; a measuring rod, the hydraulic clamp capable of clamping or releasing one end of the measuring rod; and a thrust measuring sensor, fixed on the protrusion, the thrust measuring sensor being fixedly connected to the other end of the measuring rod.

[0009] Furthermore, the fixed frame and the moving frame are connected by spring plates.

[0010] Furthermore, there are multiple spring plates, symmetrically and spaced apart at both ends of the fixed frame and the moving frame.

[0011] Furthermore, the thrust measurement stand with online range switching also includes a moving frame locking or disengaging assembly for locking or disengaging the fixed frame from the moving frame when changing the range.

[0012] Furthermore, the fixed frame is provided with locking holes, and the locking or disengaging assembly for the movable frame includes:

[0013] The locking / unlocking hydraulic cylinder is fixed on the moving frame; the tapered pin is connected to the locking / unlocking hydraulic cylinder and can be engaged with the locking hole to lock or unlock.

[0014] Compared with the prior art, the beneficial effects that can be achieved by the above-mentioned at least one technical solution adopted in the embodiments of this specification include at least the following: During the high-altitude simulation test of the engine, the embodiments of the present invention can automatically switch the thrust sensor that meets the range and accuracy requirements online according to the magnitude of the engine test thrust, thereby realizing high-precision measurement of the thrust within the full envelope of the engine. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Top view;

[0018] Figure 3 yes Figure 1 Side view;

[0019] Figure 4 This is a schematic diagram of the thrust calibration component in an embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the thrust measurement component in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the structure of the locking or unlocking component in an embodiment of the present invention.

[0022] In the figure, the following labels are used: 10, fixed frame; 20, moving frame; 30, thrust calibration assembly; 31, calibrating thrust sensor; 32, first calibration rod; 33, sleeve; 34, calibration hydraulic cylinder; 35, second calibration rod; 40, thrust measurement assembly; 41, hydraulic clamp; 42, measuring rod; 43, measuring thrust sensor; 50, spring plate; 60, locking or disengaging assembly; 61, locking / disengaging hydraulic cylinder; 62, tapered pin. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] like Figures 1 to 6As shown, this embodiment of the invention provides a thrust measurement bench with online range switching, including a fixed frame 10, a movable frame 20, multiple sets of thrust calibration components 30, and multiple sets of thrust measurement components 40. The fixed frame 10 is fixed to a base surface, and an upward-facing protrusion is provided in the middle of the fixed frame 10; the movable frame 20 is slidably connected to the fixed frame 10, and a first receiving space and a second receiving space are symmetrically arranged between the movable frame 20 and the fixed frame 10 relative to the protrusion; the multiple sets of thrust calibration components 30 are disposed in the first receiving space; and the multiple sets of thrust measurement components 40 are disposed in the second receiving space.

[0026] The embodiments of the present invention can automatically switch online to a thrust sensor that meets the range and accuracy requirements based on the magnitude of the engine test thrust during the engine high-altitude simulation test, thereby achieving high-precision measurement of the thrust within the entire envelope of the engine.

[0027] It should be noted that the fixed frame 10 is installed on a ground-supporting pier or other fixed support point to support the moving frame 20. The multiple sets of thrust calibration components 30 and the multiple sets of thrust measurement components 40 are installed in parallel.

[0028] Specifically, each thrust calibration assembly 30 includes a calibration thrust sensor 31, a first calibration rod 32, a sleeve 33, a calibration hydraulic cylinder 34, and a second calibration rod 35. The calibration thrust sensor 31 is mounted on the moving frame 20 and is positioned opposite the protrusion; one end of the first calibration rod 32 is fixedly connected to the calibration thrust sensor 31, and the other end of the first calibration rod 32 is fixedly fitted with the sleeve 33; the calibration hydraulic cylinder 34 is fixed to the protrusion; one end of the second calibration rod 35 is connected to the drive end of the calibration hydraulic cylinder 34, and the other end of the second calibration rod 35 is connected to the sleeve 33, and in the direction of the connection between the calibration hydraulic cylinder 34 and the calibration thrust sensor 31, the other end of the second calibration rod 35 can be disengaged from the sleeve 33.

[0029] The other end of the second calibration rod 35 is configured as a hemispherical structure and is installed in the ball socket of the sleeve 33. The hemispherical structure can move freely within the ball socket and can be disengaged and tightened. The other end of the first calibration rod 32 is threadedly connected to the sleeve 33 to achieve synchronous movement with the sleeve 33. In this embodiment, when the second calibration rod 35 and the sleeve 33 are in the tightened state, the thrust calibration assembly is in the working state. When the second calibration rod 35 and the sleeve 33 are in the disengaged state, the thrust calibration assembly is in the non-working state. This function can select different numbers of thrust calibration assemblies to be in the working state, thereby realizing a combination of calibration for different range segments.

[0030] The thrust measurement assembly 40 includes a hydraulic clamp 41, a measuring rod 42, and a thrust measuring sensor 43. The hydraulic clamp 41 is mounted on the moving frame 20 and is positioned opposite to the protrusion; the hydraulic clamp 41 is capable of clamping or releasing one end of the measuring rod 42; the thrust measuring sensor 43 is fixed on the protrusion and is fixedly connected to the other end of the measuring rod 42.

[0031] When the hydraulic clamp 41 clamps the measuring rod 42, the thrust measuring assembly is in operation; when the hydraulic clamp 41 disengages from the measuring rod 42, the thrust measuring assembly is in de-operation. This function allows selection of different numbers of thrust measuring assemblies 40 in operation, thereby enabling combinations of measurements across different ranges.

[0032] Preferably, the fixed frame 10 and the movable frame 20 are connected by spring plates 50. Multiple spring plates 50 are symmetrically and spaced apart at both ends of the fixed frame 10 and the movable frame 20. The spring plates 50 are fixedly connected to the fixed frame 10 and support the movable frame 20, which is used to mount the engine.

[0033] The thrust measurement stand with online range switching also includes a moving frame locking or disengaging assembly 60. The moving frame locking or disengaging assembly 60 allows for locking or disengaging the fixed frame 10 from the moving frame 20, ensuring that the device is not damaged when changing ranges.

[0034] Specifically, the fixed frame 10 is provided with a locking hole, and the moving frame locking or disengaging assembly 60 includes a locking / disengaging hydraulic cylinder 61 and a tapered pin 62. The locking / disengaging hydraulic cylinder 61 is fixed on the moving frame 20; the tapered pin 62 is connected to the locking / disengaging hydraulic cylinder 61 and can engage with the locking hole to lock or disengage.

[0035] The locking / unlocking hydraulic cylinder 61 is fixed to the moving frame 20 by a mounting flange. The locking / unlocking hydraulic cylinder 61 drives the tapered pin 62 to move up and down in the holes provided in the fixed frame 10 and the moving frame 20, so as to lock or unlock the fixed frame 10 and the moving frame 20.

[0036] When it is necessary to clamp or release a measuring rod 42, the moving frame locking or releasing component 60 should be moved downward first and slowly inserted into the locking hole provided on the fixed frame 10. After the clamping or releasing action of a measuring rod 42 is completed, the moving frame locking or releasing component 60 should be moved upward to slowly release the locking hole provided on the fixed frame 10.

[0037] It should be noted that in this embodiment, there are three thrust calibration components 30 and three thrust measurement components 40, which are installed in parallel with intervals between the fixed frame 10 and the moving frame 20. See [link to documentation]. Figure 2 As shown.

[0038] The three thrust calibration components 30 can be calibrated in three range segments. In the first range segment, only the middle thrust calibration component 30 is active, while the two side thrust calibration components 30 are inactive. In the second range segment, the middle thrust calibration component 30 is inactive, while the two side thrust calibration components 30 are active. In the third range segment, all three thrust calibration components 30 are active.

[0039] The thrust measurement assembly 40 can be divided into three measurement ranges. In the first range, only the middle thrust measurement assembly 40 is active, while the two side thrust measurement assemblies 40 are inactive. In the second range, the middle thrust measurement assembly 40 is inactive, while the two side thrust measurement assemblies 40 are active. In the third range, all three sets of thrust measurement assemblies 40 are active.

[0040] When the engine thrust is low, the first range thrust calibration component 30 and thrust measurement component 40 are used. When the engine thrust is slightly higher, the second range thrust calibration component 30 and thrust measurement component 40 are used. When the engine thrust is even higher, the third range thrust calibration component 30 and thrust measurement component 40 are used.

[0041] Of course, the above embodiments are only one implementation method provided by the present invention. The present invention can also set other combinations according to different needs to meet different working conditions, and combinations not mentioned should also be within the protection scope of the present invention.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A range online switching thrust measurement test stand, characterized in that, include: A fixed frame (10) is fixed to the base surface, and an upward protrusion is provided in the middle of the fixed frame (10); The movable frame (20) is slidably connected to the fixed frame (10), and a first accommodating space and a second accommodating space are symmetrically arranged between the movable frame (20) and the fixed frame (10) relative to the protrusion. Multiple thrust calibration components (30) are disposed in the first accommodating space; Multiple thrust measurement components (40) are disposed in the second accommodating space; The thrust calibration assembly (30) includes: A calibrated thrust sensor (31) is mounted on the moving frame (20) and positioned opposite the protrusion. The first calibration rod (32) is fixedly connected at one end to the calibration thrust sensor (31), and a sleeve (33) is fixedly provided at the other end of the first calibration rod (32). The hydraulic cylinder (34) is calibrated and fixed on the protrusion; The second calibration rod (35) has one end connected to the drive end of the calibration hydraulic cylinder (34), and the other end connected to the sleeve (33). In the direction of the connection between the calibration hydraulic cylinder (34) and the calibration thrust sensor (31), the other end of the second calibration rod (35) can be disengaged from the sleeve (33). The thrust measurement assembly (40) includes: A hydraulic clamp (41) is mounted on the moving frame (20) and is positioned opposite to the protrusion. The measuring rod (42) and the hydraulic clamp (41) are capable of clamping or releasing one end of the measuring rod (42); A thrust sensor (43) is fixed on the protrusion and is fixedly connected to the other end of the measuring rod (42).

2. The range online switched thrust stand of claim 1, wherein, The fixed frame (10) and the moving frame (20) are connected by a spring plate (50).

3. The range online switched thrust stand of claim 2, wherein, There are multiple spring plates (50), which are symmetrically and spaced at both ends of the fixed frame (10) and the moving frame (20).

4. The thrust measurement stand with online range switching according to claim 1, characterized in that, The thrust measurement stand with online range switching also includes a moving frame locking or disengaging assembly (60) for locking or disengaging the fixed frame (10) and the moving frame (20) when changing the range.

5. The thrust measurement stand with online range switching according to claim 4, characterized in that, The fixed frame (10) is provided with a locking hole, and the moving frame locking or disengaging assembly (60) includes: Locking / unlocking hydraulic cylinder (61) is fixed on moving frame (20); A tapered pin (62) is connected to a locking / unlocking hydraulic cylinder (61) and can engage with the locking hole to lock or unlock.

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