Power system thrust measuring device

By combining the thrust frame, adapter frame, and front support assembly, the problems of large torque, difficulty in ensuring coaxiality, and lateral wobble during ignition after the installation of large-size power systems are solved, achieving high-precision and stable thrust measurement.

CN121298078APending Publication Date: 2026-01-09XIAN AEROSPACE PROPULSION TESTING TECHN INST
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Patent Information

Application Number
CN202511411673.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-29
Publication Date
2026-01-09

AI Technical Summary

Technical Problem

Large-sized power systems have a large torque after installation, making it difficult to ensure system coaxiality. During ignition, they are prone to lateral wobbling, which leads to inaccurate thrust measurement and poses a safety hazard.

Method used

The system adopts a combined structure of thrust frame, adapter frame and front support assembly. The thrust frame is fixed to the test stand foundation. The adapter frame is used for docking and installation of the power system and the thrust frame. The front support assembly includes clamps, support frame, mountain-shaped spring plate and connecting block to ensure that the power system and the thrust frame are coaxial, enhance lateral stiffness and reduce axial stiffness.

Benefits of technology

It ensures the coaxiality of large-size power systems, enhances the accuracy and stability of thrust measurement, avoids safety issues caused by sway, and ensures high precision and reliability of thrust measurement.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a power system thrust measuring device, belongs to the technical field of power system test equipment, and solves the technical problem that the coaxiality is difficult to guarantee after a power system is installed, so that the power system laterally deflects during ignition, and the measuring device comprises a thrust frame, an adapter frame and a front support assembly. The thrust frame is fixed on a test bed foundation through a fastener and is used for in-situ calibration of a power system before test run and thrust measurement in the test run process. One end of the transfer frame is mounted at the front end of the thrust frame, and the other end of the transfer frame is positioned at the front end of the power system for butt-joint mounting of the power system and the thrust frame. The front supporting assembly is located at the rear end of the power system, fixed to a test bed foundation and used for supporting the power system so that the power system can be coaxial with the measuring system of the thrust frame. The device is used for axial thrust measurement in the ignition test of the liquid power system.
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Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power system test equipment, and particularly relates to a power system thrust measuring device. BACKGROUND

[0002] The steady-state thrust is measured by a thrust stand, an engine is installed at the front end of a movable stand through an adapter, and the movable stand is flexibly connected to a fixed stand through a spring sheet group. When ignited, the engine transmits the thrust to a force sensor through the movable stand for thrust measurement. For a large-size power system, the overall weight is large and the size is long, and after the power system is installed at the front end of the thrust stand, the self-gravity of the power system will generate a large moment, and the moment acts on the spring sheet group. When the moment exceeds the designed bearing capacity of the spring sheet group, the spring sheet group will be severely deformed or even damaged, the coaxiality of the power system and the thrust stand cannot be guaranteed, the front end of the power system will produce a "bending down" phenomenon, and accurate thrust measurement cannot be guaranteed. In addition, due to the long size of the power system, under the influence of the lateral force, the front end of the power system is prone to yawing when ignited, which will cause the instability of the power system during ignition and may cause safety problems. SUMMARY

[0003] In order to overcome the problems that the moment is large after the installation of the large-size power system, the coaxiality of the system is difficult to guarantee, and the power system is prone to lateral yawing when ignited, the application provides a power system thrust measuring device.

[0004] The application solves the technical problems by adopting the following technical scheme:

[0005] A power system thrust measuring device, comprising a thrust stand, an adapter, and a front support assembly.

[0006] The thrust stand is fixed on the test bed foundation by fasteners, and is used for in-situ calibration of the power system before test and thrust measurement during test.

[0007] The adapter is installed at the front end of the thrust stand at one end and at the front end of the power system at the other end, and is used for the butt joint installation of the power system and the thrust stand.

[0008] The front support assembly is located at the rear end of the power system and is fixed on the test bed foundation. The front support assembly is used for supporting the power system and making the power system coaxial with the measurement system of the thrust stand.

[0009] The front support assembly comprises a hoop, a support frame, a gable spring plate, a connecting block, and a mounting block.

[0010] The bottom of the support frame is fixed on the test bed foundation, the connecting block is welded and fixed on the support frame, the gable spring plate is fixedly connected with the connecting block, and the hoop is fixedly connected with the gable spring plate. The mounting block is fixedly connected with the gable spring plate and is used for mounting and positioning the power system. The hoop is fixedly connected with the power system shell body and is used for mounting and fixing the power system. The hoop axis is coaxial with the power system axis.

[0011] The hoop is circular, and the overall structure is that the inner diameter of the hoop is the same as the outer diameter of the power system.

[0012] A plurality of protrusions are arranged circumferentially on the hoop, and the plurality of protrusions are uniformly distributed, with two protrusions in each group. Each protrusion is provided with one protrusion positioning hole and four protrusion through holes, and the protrusion positioning hole and the protrusion through hole are used for butt joint mounting of the gable spring plate.

[0013] Eight hoop through holes are arranged circumferentially on the hoop, and the hoop through holes correspond to the through holes on the power system shell body. The hoop is fixed with the power system shell body through the hoop through holes by using a bolt fastener.

[0014] The four groups of protrusions are respectively located in the upper, lower, left and right four directions.

[0015] The support frame is in the shape of a door, and the overall structure is that the upper part of the support frame is a square frame composed of a square tube. The square frame is sleeved on the outside of the power system and is flush with the hoop, and the center line is coaxial with the axes of the power system and the hoop.

[0016] The top of the gable spring plate is connected, and the bottom width is divided into three spokes according to a ratio of 1:3:1. One gable spring plate positioning hole and four gable spring plate through holes are arranged at the end of each spoke. The four gable spring plate through holes are uniformly distributed, and one gable spring plate positioning hole is located at the center of the four gable spring plate through holes. The width and position of the spokes on both sides of the gable spring plate correspond to the protrusions of the hoop.

[0017] The front surface of the connecting block is rectangular, and the front surface is provided with a connecting block positioning hole and a connecting block internal thread hole. The connecting block positioning hole and the connecting block internal thread hole correspond to the gable spring plate positioning hole and the gable spring plate through hole of the middle spoke of the gable spring plate, respectively. The width of the connecting block is the same as the width of the middle spoke of the gable spring plate, and one connecting block corresponds to each gable spring plate. After the middle spoke of each gable spring plate is positioned by the gable spring plate positioning hole at the end and the connecting block with a positioning pin, a bolt fastener is used for fastening.

[0018] The front surface of the mounting block is rectangular, and the front surface is provided with a mounting block positioning hole and a mounting block internal thread hole corresponding to the gable spring plate positioning hole and the gable spring plate through hole of the two side spokes of the gable spring plate.

[0019] The gable spring plate is made of 50CrVA and is subjected to a modulation treatment.

[0020] The connecting block has a thickness of 50 mm.

[0021] The mounting block has a thickness of 10 mm.

[0022] The power system thrust measurement device has the advantages that:

[0023] The power system thrust measurement device has the advantages that:

[0024] The power system thrust measurement device has the advantages that:

[0025] The power system thrust measurement device has the advantages that:

[0026] The power system thrust measurement device has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1is a schematic view of a power system thrust measuring device structure according to an embodiment of the present application;

[0028] Figure 2 is a schematic view of a hoop structure according to an embodiment of the present application;

[0029] Figure 3 is a schematic view of a support frame structure according to an embodiment of the present application;

[0030] Figure 4 is a schematic view of a mountain-shaped spring plate structure according to an embodiment of the present application.

[0031] Reference signs:

[0032] 1. thrust frame, 2. adapter frame, 3. front support assembly, 4. power system, 5. test stand foundation, 6. test stand base;

[0033] 31. hoop, 32. support frame, 33. mountain-shaped spring plate, 34. connecting block, 35. mounting block;

[0034] 311. protrusion. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Embodiment 1

[0037] A large-size power system thrust measuring device mainly consists of a thrust frame 1, an adapter frame 2, a front support assembly 3, etc.

[0038] The thrust frame 1 is fixed on the test stand foundation 5 by fasteners, used for mounting the large-size power system 4, and realizing in-situ calibration before testing and thrust measurement during testing.

[0039] The adapter frame 2 is installed at the front end of the thrust frame 1 at one end, and is connected and installed with the large-size power system 4 at the other end;

[0040] The front support assembly 3 consists of a hoop 31, a support frame 32, a mountain-shaped spring plate 33, a connecting block 34, and a mounting block 35.

[0041] The overall shape of the hoop 31 is a circular ring, the outer shell of the power system 4 is a cylinder, and the inner diameter of the hoop 31 is the same as the outer diameter of the power system 4. The hoop 31 is circumferentially provided with 4 groups of 8 protrusions, and two adjacent protrusions 311 form a group. Each protrusion 311 is provided with a protrusion positioning hole and four protrusion through holes, which are used to connect and install the mountain-shaped spring plate. The hoop 31 is sleeved on the power system shell away from the thrust frame 1, and the four groups of protrusions are located in the upper, lower, left and right positions respectively. The hoop 31 is provided with eight through holes along the circumference, which correspond to the through holes on the power system shell. The hoop 31 and the power system shell are fixed firmly by using a bolt fastener.

[0042] The support frame 32 is made of square tubes, round tubes and steel plates, and has the overall shape of a door. The bottom of the support frame 32 is fixed on the test bed foundation 6, and the upper part of the support frame 32 is composed of a square frame made of square tubes. The side length of the square frame is slightly larger than the outer diameter of the power system 4, and the square frame is sleeved on the outside of the power system 3 and is flush with the position of the hoop 31. The axis of the square frame is coaxial with the axes of the power system 4 and the hoop 31.

[0043] The mountain-shaped spring plate 33 is made of 50CrVA and has good elasticity after modulation treatment. The top of the mountain-shaped spring plate 33 is connected, and the bottom is divided into three spokes according to the ratio of 1:3:1. There is a gap between the adjacent spokes, and the overall shape is in the shape of a mountain. The end of each spoke is provided with a positioning hole and four through holes. The width and position of the spokes on both sides of the mountain-shaped spring plate 33 correspond to the protrusions 311 on the hoop 31.

[0044] The connecting block 34 is rectangular, and the front surface is provided with a positioning hole and an internal threaded hole, which correspond to the positioning hole and the through hole of the middle spoke of the mountain-shaped spring plate 33. The width of the connecting block 34 is the same as the width of the middle spoke of the mountain-shaped spring plate 33, and the thickness of the connecting block 34 is 50mm. Each mountain-shaped spring plate 33 corresponds to one connecting block 34.

[0045] The mounting block 35 is rectangular, and the front surface is provided with a positioning hole and an internal threaded hole, which correspond to the positioning hole and the through hole of the two side spokes of the mountain-shaped spring plate 33. The width of the mounting block 35 is the same as the width of the two side spokes of the mountain-shaped spring plate 33, and the thickness of the mounting block 35 is 10mm. Each mountain-shaped spring plate corresponds to two mounting blocks 35.

[0046] Four mountain-shaped spring plates 33 are used to connect the hoop 31 and the support frame 32. The two side spokes of each mountain-shaped spring plate 33 are positioned by the positioning holes at the ends and the protrusions 311 and the mounting blocks 35 on the hoop 31 in turn, and then fastened by using a bolt fastener. The middle spoke of each mountain-shaped spring plate 33 is positioned by the positioning hole at the end and the connecting block 34 by using a positioning pin, and then fastened by using a bolt fastener. The connecting block 34 and the support frame 32 are welded and fixed.

Claims

1. A thrust measuring device for a power system, characterized in that, Includes a thrust frame (1), a transition frame (2), and a front support assembly (3); The thrust frame (1) is fixed to the test bench foundation (5) by fasteners and is used for in-situ calibration of the power system (4) before the test and thrust measurement during the test. One end of the adapter (2) is installed at the front end of the thrust frame (1), and the other end is located at the front end of the power system (4), and the power system (4) is installed in connection with it, which is used for the connection between the power system (4) and the thrust frame (1); The front support assembly (3) is located at the rear end of the power system (4) and fixed on the test bench foundation (6); it is used to support the power system (4) so ​​that the power system (4) is coaxial with the measurement system of the thrust frame (1); The front support assembly (3) includes a clamp (31), a support frame (32), a mountain-shaped spring plate (33), a connecting block (34), and a mounting block (35); The bottom of the support frame (32) is fixed on the test bench foundation (6). The connecting block (34) is welded and fixed on the support frame (32). The mountain-shaped spring plate (33) is fixedly connected to the connecting block (34). The clamp (31) is fixedly connected to the mountain-shaped spring plate (33). The mounting block (35) is fixedly connected to the mountain-shaped spring plate (33) for the installation and positioning of the power system (4). The clamp (31) is fixedly connected to the outer shell of the power system (4) for the installation and fixing of the power system (4). The shaft of the clamp (31) is coaxial with the shaft of the power system (4).

2. The thrust measuring device for a power system according to claim 1, characterized in that, The clamp (31) is a ring-shaped integral structure, and the inner diameter of the clamp (31) is the same as the outer diameter of the power system (4). The clamp (31) is provided with an array of protrusions (311) along the circumference. The array of protrusions (311) is evenly distributed, with 2 protrusions (311) in each group. Each protrusion (311) is provided with 1 protrusion positioning hole and 4 protrusion through holes. The protrusion positioning hole and the protrusion through holes are used to connect and install the mountain-shaped spring plate (33). The clamp (31) is provided with 8 clamp through holes along the circumference, and the clamp through holes correspond to the through holes on the outer shell of the power system (4); the clamp (31) and the outer shell of the power system (4) are fixed by bolt fasteners through the clamp through holes.

3. The thrust measuring device for a power system according to claim 2, characterized in that, The protrusions (311) are arranged in 4 groups, and the 4 groups of protrusions (311) are located in the four directions of directly above, directly below, directly left, and directly right.

4. The thrust measuring device for a power system according to claim 1 or 3, characterized in that, The support frame (32) is a door-shaped, integral structure; the upper part of the support frame (32) is a square frame, which is composed of square tubes welded together; the square frame is fitted on the outside of the power system (4), flush with the clamp (31), and the center line is coaxial with the axis of the power system (4) and the clamp (31); The top of the mountain-shaped spring plate (33) is connected, and the bottom width is divided into three spokes in a ratio of 1:3:

1. Each spoke has one mountain-shaped spring plate positioning hole and four mountain-shaped spring plate through holes at its end. The four mountain-shaped spring plate through holes are evenly distributed, and the one mountain-shaped spring plate positioning hole is located at the center of the four mountain-shaped spring plate through holes. The width and position of the spokes on both sides of the mountain-shaped spring plate (33) correspond to the protrusion (311). The front of the connecting block (34) is rectangular, and the front is provided with a connecting block positioning hole and a connecting block internal thread hole. The connecting block positioning hole and the connecting block internal thread hole correspond to the mountain-shaped spring plate positioning hole and the mountain-shaped spring plate through hole of the middle spoke of the mountain-shaped spring plate, respectively. The width of the connecting block (34) is the same as the width of the middle spoke of the mountain-shaped spring plate. Each mountain-shaped spring plate (33) corresponds to one connecting block (34). The middle spoke of each mountain-shaped spring plate is positioned with the connecting block (34) through the mountain-shaped spring plate positioning hole at the end by a positioning pin, and then fastened with bolt fasteners. The mounting block (35) is rectangular on the front, and has mounting block positioning holes and mounting block internal thread holes on the front, which correspond to the mountain-shaped spring plate positioning holes and mountain-shaped spring plate through holes on both sides of the mountain-shaped spring plate (33); the width of the mounting block (35) is the same as the width of the spokes on both sides of the mountain-shaped spring plate (33), and each mountain-shaped spring plate (33) corresponds to 2 mounting blocks (35); after the spokes on both sides of each mountain-shaped spring plate (33) are positioned by positioning pins with the protrusion (311) and mounting block (35) in sequence through the mountain-shaped spring plate positioning holes at the ends, they are fastened with bolt fasteners.

5. The thrust measuring device for a power system according to claim 1, characterized in that, The mountain-shaped spring plate (33) is made of 50CrVA and has undergone tempering treatment.

6. The thrust measuring device for a power system according to claim 1, characterized in that, The thickness of the connecting block (34) is 50 mm.

7. The thrust measuring device for a power system according to claim 1, characterized in that, The thickness of the mounting block (35) is 10 mm.