Device and method for measuring elastic force of elastic supporting structure between aero-engine casing and outer ring

Abstract

The invention discloses a device and method for measuring elastic force of an elastic supporting structure between an aero-engine casing and an outer ring, the device comprises a base, a mounting flat plate, a pressure bearing block, a lower clamp, an upper clamp, a two-dimensional force sensor, a connecting plate, a sliding table and a servo motor, the mounting flat plate is mounted on the base, the pressure bearing block is fixed on the mounting flat plate, and the upper clamp is fixed on the connecting plate. The lower clamp is installed on one side face of the pressure bearing block, the connecting plate is fixed to the sliding table, the servo motor is connected with the sliding table, the servo motor can control the feeding amount of the sliding table and drive the connecting plate to transversely move in the horizontal direction, and a combination of the sliding table and the servo motor is fixed to the installation flat plate. The two-dimensional force sensor is installed at one end of the connecting plate close to the lower clamp, the upper clamp is installed at the other end of the two-dimensional force sensor, the upper clamp and the lower clamp are oppositely arranged, and one end of the upper clamp close to the lower clamp is used for installing an elastic supporting structure to be measured. The device and the method can evaluate whether the elastic force of the elastic support material is in a reasonable range or not.

Description

Technical Field

[0001] The invention belongs to the technical field of elastic force measurement test of a connection structure between an aircraft engine casing and an outer ring, and mainly relates to a device and a method for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring. Background Art

[0002] With the continuous development of aircraft engines, at this stage, the inlet temperature of advanced aircraft engine turbines is constantly increasing. The excessively high temperature makes the working environment of the turbine outer ring increasingly harsh. Therefore, new materials are now used for the turbine outer ring. Ceramic-based composite materials are used to process the turbine outer ring for use in aircraft engines. Ceramic-based composite materials can withstand higher gas temperatures, allowing aircraft engines to operate safely at higher temperatures.

[0003] In actual use, aircraft engines will experience starting, slowing, cruising, emergency stopping and other working conditions, which directly or indirectly aggravate the vibration phenomenon during operation. During the vibration process, the outer ring of the turbine may be subjected to a large impact force, but the strength of the ceramic-based composite material is low and cannot withstand the excessive impact force caused by vibration. Therefore, it is very important to install an elastic support structure between the outer ring of the turbine and the casing. The elastic support structure can effectively absorb the impact force caused by the vibration of the aircraft engine during operation and ensure that the outer ring of the turbine works within a safe range. However, if the elastic force of the elastic support structure is too large or too small, the outer ring of the turbine cannot be in a safe working environment. When the elastic force of the elastic support structure is too large, it will damage the outer ring of the turbine. If the elastic force of the elastic support structure is too small, it will not be able to reduce the impact force, so it cannot protect the outer ring. In severe cases, it may cause damage to the entire engine.

[0004] It is particularly important to measure the elastic force that the elastic support structure between the casing and the outer ring can generate. Therefore, the present invention proposes a device and method for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine, so as to evaluate whether the elastic force of the elastic support material is within a reasonable range. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine, so as to measure the magnitude of the elastic force that can be generated by the elastic support structure between the casing and the outer ring.

[0006] To achieve the above object, the present invention adopts the following technical solution: A device for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring, comprising a base, a mounting plate, a pressure bearing block, a lower fixture, an upper fixture, a two-dimensional force sensor, a connecting plate, a slide and a servo motor, wherein the mounting plate is mounted on the base, the pressure bearing block is fixed on the mounting plate, the lower fixture is mounted on a side of the pressure bearing block, the connecting plate is fixed on the slide, the servo motor is connected to the slide, the servo motor can control the feed amount of the slide and drive the connecting plate to move laterally in the horizontal direction, the combination of the slide and the servo motor is fixed on the mounting plate, the two-dimensional force sensor is mounted on one end of the connecting plate near the lower fixture, the upper fixture is mounted on the other end of the two-dimensional force sensor, the upper fixture and the lower fixture are arranged opposite to each other, and the end of the upper fixture near the lower fixture is used for mounting the elastic support structure to be measured.

[0007] Furthermore, a plurality of triangular fixing members are fixed to the lower side of the pressure bearing block by bolts, and the bottom surfaces of the triangular fixing members are fixed to the mounting plate by bolts.

[0008] Furthermore, the two-dimensional force sensor can read the magnitude of the pressure in real time through computer software, and generate a curve of pressure change over time in the computer software.

[0009] Furthermore, a threaded connecting rod is provided on both sides of the two-dimensional force sensor, threaded holes matching the threads of the two connecting rods are provided on the connecting plate and the upper fixture, and the two connecting rods are connected to the connecting plate and the upper fixture through threads.

[0010] Furthermore, the accuracy of the two-dimensional force sensor is 0.01N.

[0011] Furthermore, the feed accuracy of the slide is 0.001 mm.

[0012] Furthermore, one end of the upper clamp for mounting the elastic support structure is provided with a screw rod, and the elastic support structure is fixed to the upper clamp by the screw rod.

[0013] Furthermore, one end of the lower fixture is provided with an external thread, and the pressure bearing block is provided with a threaded hole matching the external thread. The lower fixture is fixed to the pressure bearing block via threads, and one end of the lower fixture near the upper fixture is a platform.

[0014] Furthermore, the lower fixture and the upper fixture are both provided with cavities for introducing cooling water.

[0015] Furthermore, the mounting plate is fixed to the base by bolts; the connecting plate is fixed to the slide by bolts, and the combination of the slide and the servo motor is fixed to the mounting plate by bolts.

[0016] A method for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring comprises the following steps: Step 1, first fix the elastic support structure on the upper fixture; Step 2, connecting the two-dimensional pressure sensor to a computer, and adjusting the two-dimensional pressure sensor to zero using computer software; Step 3, controlling the servo motor through the control system, and then controlling the feed amount of the slide, so that the elastic support structure contacts the platform of the lower fixture, and when the two-dimensional pressure sensor shows a pressure value, it is considered that the elastic support structure contacts the platform of the lower fixture; Step 4, the servo motor is controlled to control the feed amount of the slide. During the process of compressing the elastic support structure, the two-dimensional pressure sensor reads the pressure in real time. When the feed amount reaches the feed amount required for the test, the pressure change trend is recorded through the computer software; Step 5, by controlling the servo motor, thereby controlling the slide, the elastic support structure leaves the platform of the lower fixture, and the elastic support structure is removed from the upper fixture, thereby ending the test.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. The two-dimensional pressure sensing device used in the present invention can achieve an accuracy of 0.01N and can be used to measure elastic support structures with relatively small elastic forces.

[0018] 2. The slide used in the present invention controls the feed amount through a servo motor, and the accuracy can reach 0.001mm. In addition, the strength and rigidity of the shaft on the slide can meet the test requirements.

[0019] 3. The present invention can be used to measure the elastic force of some non-standard elastic support structures. The size of the upper and lower clamps can be changed through the actual elastic support structure, thereby realizing the measurement of the elastic force of the non-standard elastic support structure.

[0020] 4. The present invention can also be used to measure the change in elastic force of a high-temperature elastic support structure during the cooling process. Cooling water can be passed through the upper and lower clamps to prevent heat from being transferred to the two-dimensional pressure sensor and affecting the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a device for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring of the present invention; Figure 2 It is a front view of the device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to the present invention; Figure 3 It is a top view of the device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to the present invention; Figure 4It is a structural diagram of a displacement feeding device of a device for measuring the elastic force of an elastic supporting structure between an aircraft engine casing and an outer ring of the present invention; Figure 5 It is a cross-sectional view of the lower fixture of the device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine of the present invention; Figure 6 It is a cross-sectional view of an upper fixture of a device for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring of the present invention; Figure 7 It is a schematic diagram of a two-dimensional pressure sensor of a device for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring of the present invention; In the figure: 1-base, 2-mounting plate, 3-triangular fixing piece, 4-pressure bearing block, 5-lower fixture, 6-upper fixture, 7-two-dimensional pressure sensor, 8-connecting plate, 9-slide, 10-servo motor. DETAILED DESCRIPTION

[0022] The present invention will be further explained below in conjunction with the accompanying drawings.

[0023] like Figures 1 to 3 As shown, a device for measuring the elastic force of the elastic support structure between the aircraft engine casing and the outer ring of the present invention includes a base 1, a mounting plate 2, a triangular fixing member 3, a pressure bearing block 4, a lower clamp 5, an upper clamp 6, a two-dimensional force sensor 7, a connecting plate 8, a slide 9 and a servo motor 10.

[0024] like Figures 1 to 3 As shown, the mounting plate 2 is fixed to the base 1 by bolts, the pressure bearing block 4 is fixed to the mounting plate 2, and a plurality of triangular fixing members 3 are fixed to the lower side of the pressure bearing block 4 by bolts, and the bottom surface of the triangular fixing member 3 is fixed to the mounting plate 2 by bolts. Bolt holes are respectively provided on the four lower sides of the pressure bearing block 4, and one surface of the triangular fixing member 3 is fixed to the lower side of the pressure bearing block 4 by bolts, and then the combination of the triangular fixing member 3 and the pressure bearing block 4 is fixed to the mounting plate 2 by bolts.

[0025] The lower fixture 5 is mounted on one side of the pressure bearing block 4. Figure 5 As shown, one end of the lower clamp 5 is provided with an external thread, and a threaded hole matching the threaded hole is provided on the pressure bearing block 4. The lower clamp 5 is fixed to the pressure bearing block 4 by threads, and one end of the lower clamp 5 near the upper clamp 6 is a platform for supporting the elastic support structure.

[0026] like Figure 4As shown, the connecting plate 8 is fixed on the slide 9 by bolts, and the servo motor 10 is connected to the slide 9. The servo motor 10 can control the feed amount of the slide 9 and drive the connecting plate 8 to move horizontally. The feed amount accuracy of the slide 9 is 0.001mm. The combination of the slide 9 and the servo motor 10 is fixed on the mounting plate 2 by bolts, as shown in FIG. Figures 1 to 3 .

[0027] The two-dimensional force sensor 7 is installed on one end of the connecting plate 8 near the lower clamp 5, and the upper clamp 6 is installed on the other end of the two-dimensional force sensor 7. The upper clamp 6 and the lower clamp 5 are arranged opposite to each other, and the end of the upper clamp 6 near the lower clamp 5 is used to install the elastic support structure to be measured.

[0028] like Figure 6 As shown, one end of the upper clamp 6 for mounting the elastic supporting structure is provided with a screw rod, through which the elastic supporting structure is fixed to the upper clamp 6 .

[0029] like Figure 7 As shown, a connecting rod with a thread is respectively provided on both sides of the two-dimensional force sensor 7, and threaded holes matching the threads of the two connecting rods are respectively provided on the connecting plate 8 and the upper clamp 6, and the two connecting rods are respectively connected to the connecting plate 8 and the upper clamp 6 by threads.

[0030] The two-dimensional force sensor 7 can read the pressure in real time through computer software and generate a curve of pressure change over time in the computer software. The accuracy of the two-dimensional force sensor 7 is 0.01N.

[0031] The lower clamp 5 and the upper clamp 6 are both provided with cavities for introducing cooling water. The present invention can be used to measure the change in elastic force of a high-temperature elastic support structure during the cooling process. The cavities of the lower clamp 5 and the upper clamp 6 can introduce cooling water to prevent heat from being transferred to the two-dimensional pressure sensor 7 and affecting the measurement.

[0032] Based on the above device, the present invention provides a method for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine, comprising the following steps: Step 1, first fix the elastic support structure on the upper fixture 6; Step 2, connecting the two-dimensional pressure sensor 7 to a computer, and adjusting the two-dimensional pressure sensor 7 to zero using computer software; Step 3, control the servo motor 10 through the control system, and then slowly control the feed amount of the slide 9, so that the elastic support structure contacts the platform of the lower fixture 5. When the two-dimensional pressure sensor 7 shows a very small pressure value, it is considered that the elastic support structure contacts the platform of the lower fixture 5; Step 4, control the servo motor 10 again to slowly control the feed amount of the slide 9. During the process of compressing the elastic support structure, the two-dimensional pressure sensor 7 reads the pressure in real time. When the feed amount reaches the feed amount required for the test, the pressure change trend is recorded through the computer software; Step 5, by controlling the servo motor 10, thereby controlling the slide 9, the elastic support structure leaves the platform of the lower fixture 5, and the elastic support structure is removed from the upper fixture 6, and the test is ended.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A device for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring, characterized in that: The invention comprises a base (1), a mounting plate (2), a pressure bearing block (4), a lower fixture (5), an upper fixture (6), a two-dimensional force sensor (7), a connecting plate (8), a slide table (9) and a servo motor (10), wherein the mounting plate (2) is mounted on the base (1), the pressure bearing block (4) is fixed on the mounting plate (2), the lower fixture (5) is mounted on a side of the pressure bearing block (4), the connecting plate (8) is fixed on the slide table (9), and the servo motor (10) is connected to the slide table (9). The servo motor (10) can control the feed rate of the slide (9) and drive the connecting plate (8) to move horizontally. The combination of the slide (9) and the servo motor (10) is fixed on the mounting plate (2). The two-dimensional force sensor (7) is mounted on one end of the connecting plate (8) near the lower clamp (5). The upper clamp (6) is mounted on the other end of the two-dimensional force sensor (7). The upper clamp (6) and the lower clamp (5) are arranged opposite to each other. The end of the upper clamp (6) near the lower clamp (5) is used to mount the elastic support structure to be measured.

2. A device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: A plurality of triangular fixing members (3) are fixed to the lower side of the pressure bearing block (4) by means of bolts, and the bottom surfaces of the triangular fixing members (3) are fixed to the mounting plate (2) by means of bolts.

3. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: The two-dimensional force sensor (7) can read the magnitude of the pressure in real time through computer software, and generate a curve showing the change of pressure over time in the computer software.

4. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: A connecting rod with a thread is respectively provided on both sides of the two-dimensional force sensor (7); threaded holes matching the threads of the two connecting rods are respectively provided on the connecting plate (8) and the upper clamp (6); and the two connecting rods are respectively connected to the connecting plate (8) and the upper clamp (6) via threads.

5. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: The accuracy of the two-dimensional force sensor (7) is 0.01N; the accuracy of the feed amount of the slide table (9) is 0.001mm.

6. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: One end of the upper clamp (6) for mounting the elastic support structure is provided with a screw rod, and the elastic support structure is fixed to the upper clamp (6) by means of the screw rod.

7. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: One end of the lower clamp (5) is provided with an external thread, and a threaded hole matching the threaded hole is provided on the pressure bearing block (4). The lower clamp (5) is fixed to the pressure bearing block (4) by means of threads, and one end of the lower clamp (5) near the upper clamp (6) is a platform.

8. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: The lower clamp (5) and the upper clamp (6) are both provided with a cavity for introducing cooling water.

9. The device for measuring the elastic force of the elastic support structure between the casing and the outer ring of an aircraft engine according to claim 1, characterized in that: The mounting plate (2) is fixed to the base (1) by bolts; the connecting plate (8) is fixed to the slide (9) by bolts; and the combination of the slide (9) and the servo motor (10) is fixed to the mounting plate (2) by bolts.

10. A method for measuring the elastic force of an elastic support structure between an aircraft engine casing and an outer ring, characterized in that: The following steps are involved: Step 1, first fix the elastic support structure on the upper fixture (6); Step 2, connecting the two-dimensional pressure sensor (7) to a computer, and adjusting the two-dimensional pressure sensor (7) to zero using computer software; Step 3, controlling the servo motor (10) through the control system, thereby controlling the feed amount of the slide (9), so that the elastic support structure is in contact with the platform of the lower fixture (5), and when the two-dimensional pressure sensor (7) shows a pressure value, it is considered that the elastic support structure is in contact with the platform of the lower fixture (5); Step 4, controlling the servo motor (10) to control the feed amount of the slide (9), and in the process of compressing the elastic support structure, the two-dimensional pressure sensor (7) reads the pressure in real time, and when the feed amount reaches the feed amount required for the test, the pressure change trend is recorded by computer software; Step 5, by controlling the servo motor (10), thereby controlling the slide (9), the elastic support structure leaves the platform of the lower fixture (5), and the elastic support structure is removed from the upper fixture (6), thereby ending the test.

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