Small solid rocket engine wake flow ablation test tool

Abstract

The utility model relates to a small solid rocket engine wake flow ablation test tool which comprises a base plate, a force bearing plate, an engine carrying table and a sample support are sequentially arranged on the base plate, two rows of distance positioning holes are formed in the base plate, the sample support is selectively and fixedly connected with the distance positioning holes, and the distance positioning holes are arranged on the base plate. Fan-shaped support plates are arranged on the two sides of the sample support, a plurality of angle positioning holes are formed in the arc-shaped edges of the fan-shaped support plates, one end of the sample carrying table is movably connected with the circle center of the fan-shaped support plates, and the other end of the sample carrying table is selectively and fixedly connected with the angle positioning holes. According to the utility model, the distance and the contact angle between the sample and the wake flow of the small solid rocket engine can be adjusted, and the flexibility of an ablation test and the continuous test efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of ablation testing, specifically to a small solid rocket engine wake ablation testing fixture. Background Technology

[0002] The development of ablation-resistant materials requires testing their ablation resistance using hot flow erosion to provide a reference for subsequent research, improvement, and manufacturing. The wake ablation test of ablation-resistant materials requires fixing the material behind the engine nozzle to withstand the hot flow impact. The performance of the ablation-resistant material is measured by its resistance to ablation and the degree of damage caused by ablation. To develop high-performance ablation-resistant materials, multiple tests are usually required for comparative analysis. Existing ablation-resistant material wake ablation testing fixtures generally adopt an integrated design, which limits the adjustment of the contact angle and distance between the ablation-resistant material and the hot flow during the test, resulting in insufficient testing flexibility. Utility Model Content

[0003] The purpose of this invention is to provide a small solid rocket motor wake ablation test fixture, including a sample holder, a sample stage mounted on the sample holder, the sample stage being adjustable in angle to change the contact angle between the sample and the heat flow, and the distance between the sample holder and the engine being adjustable to change the distance between the sample and the heat flow, thereby improving the flexibility of the ablation test.

[0004] This utility model is achieved through the following technical solution: a small solid rocket motor wake ablation test fixture, including a base plate, a load-bearing plate, an engine platform, and a sample holder arranged sequentially on the base plate, the base plate having two rows of distance positioning holes, the sample holder being optionally fixedly connected to the distance positioning holes, fan-shaped support plates on both sides of the sample holder, the arc edges of the fan-shaped support plates having multiple angle positioning holes, one end of the sample platform being movably connected to the center of the fan-shaped support plate, and the other end of the sample platform being optionally fixedly connected to the angle positioning holes.

[0005] In a preferred embodiment, the engine platform is provided with a sinkhole, and a clamp is provided above the sinkhole.

[0006] In a preferred embodiment, the fan-shaped support plate is provided with drainage holes.

[0007] In a preferred embodiment, the sample stage is provided with a sample slot.

[0008] In a preferred embodiment, the base plate has waist-shaped holes at both ends.

[0009] In a preferred embodiment, the load-bearing plate is provided with sensor connection holes.

[0010] This utility model has the following advantages compared with the prior art:

[0011] In this invention, two rows of distance positioning holes are provided on the base plate. The sample holder can be selectively fixedly connected to one of the distance positioning holes, thereby changing the distance between the sample and the exhaust of the small solid rocket motor. Fan-shaped support plates are provided on both sides of the sample holder. Multiple angle positioning holes are provided on the arc edge of the fan-shaped support plate. One end of the sample stage is movably connected to the center of the fan-shaped support plate, and the other end of the sample stage can be selectively fixedly connected to any angle positioning hole, thereby changing the contact angle between the sample and the exhaust of the small solid rocket motor and improving the flexibility of the ablation test.

[0012] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the sample holder structure in this utility model;

[0015] Figure 3 This is a schematic diagram of the sample stage in this utility model. Detailed Implementation

[0016] Example 1:

[0017] See Figure 1 A small solid rocket motor wake ablation test fixture includes a base plate 1. From left to right, the base plate 1 is provided with a load-bearing plate 9, an engine platform 5, and a sample holder 6. The base plate 1 is provided with two rows of distance positioning holes 10. The sample holder 6 can be optionally fixedly connected to the distance positioning holes 10. The sample holder 6 is provided with fan-shaped support plates 11 on both sides. The arc-shaped support plates 11 are provided with multiple angle positioning holes 12. One end of the sample platform 8 is movably connected to the center of the fan-shaped support plate 11, and the other end of the sample platform 8 can be optionally fixedly connected to the angle positioning holes 12.

[0018] See Figure 1In this embodiment, the base plate 1 is elongated, and the load-bearing plate 9 is vertically fixed to the left side of the base plate 1. The load-bearing plate 9 and the base plate 1 are integrally formed. The engine platform 5 is fixed to the right side of the load-bearing plate 9. Connecting plates are provided on both sides of the engine platform 5, and the connecting plates have four connecting holes. The base plate 1 has four threaded holes, and the engine platform 5 is fixedly installed on the base plate 1 by four bolts. The sample holder 6 is installed on the right side of the engine platform 5. The left side of the sample holder 6 has two fan-shaped support plates 11. One right-angled side of the two fan-shaped support plates 11 (near the engine platform 5) is perpendicular to the base plate 1, and the other right-angled side is parallel to the base plate 1. The right side of the sample holder 6 has four connecting holes, which can be selectively fixed to any four adjacent positioning holes 10 by bolts. The sample platform 8 is installed between the two fan-shaped support plates 11. The two ends of the sample platform 8 are respectively provided with two connecting holes (e.g., ...). Figure 3 As shown), the two connecting holes at one end are movably connected to the center of the sector bracket plate 11 by bolts, and the two connecting holes at the other end are optionally fixedly connected to the angle positioning hole 12 by bolts.

[0019] In this embodiment, the engine platform 5 is provided with a sink trough, and a clamp 4 is provided above the sink trough. The small solid rocket motor, referred to as the engine in this document, lies flat in the sink trough. The clamp 4 locks the engine 3 in place, and the surface of the sink trough and the clamp 4 are fitted to the surface of the engine 3 to prevent the engine 3 from moving radially after ignition.

[0020] During the engine exhaust ablation test, the base plate 1 is fixed to the test stand, the engine platform 5 is mounted on the base plate 1, and the engine 3 is mounted on the engine platform 5. Then, the load-bearing plate 9, sensor 2, and engine 3 are connected sequentially using threaded connections. The distance between the sample holder 6 and the engine platform 5, and the tilt angle of the sample platform 8 are adjusted, and the sample 7 is fixed on the sample platform 8. In this embodiment, the sample 7 is an ablation-resistant material plate. After the engine 3 is ignited, the sensor 2 measures the thrust of the engine 3 and records the ablation time. After the test, the sample 7 is removed, and the ablation area and depth on the surface of the sample 7 are observed.

[0021] When it is necessary to conduct engine exhaust ablation tests at different tilt angles, first remove the ablated sample 7 from the sample platform 8, remove the screws used to connect the sample platform 8 and the sample support 6, then use the screws to fix the sample platform 8 to the sample support 6 at a new angle, and finally fix the new sample 7 to the sample platform 8 for a new ablation test.

[0022] When it is necessary to conduct engine exhaust ablation tests with different ablation distances, first remove the ablated sample 7 from the sample stage 8, remove the screws used to connect the sample bracket 6 and the base plate 1, then use the screws to fix the sample bracket 6 to the new position on the base plate 1, and finally fix the new sample 7 to the sample stage 8 for a new ablation test.

[0023] By repeating this process, we can obtain the ablation effect of the engine exhaust on the sample under different thrusts, distances, angles, and durations.

[0024] In this embodiment, the load-bearing plate 9, sensor 2, and engine 3 are connected by threads for easy assembly and disassembly. The engine 3 is fixed by clamps 4, facilitating quick replacement of engines 3 with different thrust for testing.

[0025] See Figure 2 In this embodiment, the fan-shaped support plate 11 is provided with drainage holes 13. The drainage holes 13 on both sides of the sample holder 6 are used to drain the exhaust flow of the engine 3 to prevent excessive heat flow impact from damaging the sample 7 and the test fixture. The drainage holes 13 are fan-shaped.

[0026] See Figure 3 In this embodiment, the sample stage 8 is provided with a sample slot 14. The sample slot 14 is a rectangular slot adapted to the size of the sample 7, and the depth of the sample slot 14 is not less than half the thickness of the sample 7. The sample 7 is loaded and fixed on the sample stage 8 by being embedded in the sample slot 14. This embodiment uses a slot structure to load the sample 7, which facilitates the replacement and reuse of different samples 7 and improves the efficiency of the test.

[0027] See Figure 1 In this embodiment, the base plate 1 has waist-shaped holes 15 at both ends. The waist-shaped holes 15 at both ends of the base plate 1 are fixedly installed on the test bench by through bolts.

[0028] In this embodiment, the load-bearing plate 9 is provided with a sensor connection hole. The sensor connection hole is a threaded hole for a thrust sensor, referred to herein as sensor 2. One end of sensor 2 is threadedly fixed to the load-bearing plate 9, and the other end of sensor 2 is threadedly fixed to the engine 3.

[0029] This utility model mainly adopts a threaded connection, which is simple in structure and can meet the needs of timely disassembly and replacement of various components, thereby improving the efficiency of the test.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solution of this utility model do not depart from the spirit and scope of this utility model, and should all be covered within the scope of the claims of this utility model.

Claims

1. A test fixture for the exhaust ablation of a small solid rocket motor, characterized in that: The system includes a base plate (1), on which a load-bearing plate (9), an engine platform (5), and a sample holder (6) are sequentially arranged. The base plate (1) has two rows of distance positioning holes (10). The sample holder (6) can be selectively fixedly connected to the distance positioning holes (10). The sample holder (6) has fan-shaped support plates (11) on both sides. The arc-shaped support plates (11) have multiple angle positioning holes (12) on their arc edges. One end of the sample platform (8) is movably connected to the center of the fan-shaped support plate (11), and the other end of the sample platform (8) can be selectively fixedly connected to the angle positioning holes (12).

2. The experimental fixture for the exhaust ablation of a small solid rocket motor according to claim 1, characterized in that: The engine platform (5) is provided with a sinkhole, and a clamp (4) is provided above the sinkhole.

3. The experimental fixture for the exhaust ablation of a small solid rocket motor according to claim 1, characterized in that: The fan-shaped support plate (11) is provided with a drain hole (13).

4. The experimental fixture for the exhaust ablation of a small solid rocket motor according to claim 1, characterized in that: The sample stage (8) is provided with a sample slot (14).

5. The experimental fixture for the exhaust ablation of a small solid rocket motor according to claim 1, characterized in that: The base plate (1) has waist-shaped holes (15) at both ends.

6. The experimental fixture for the exhaust ablation of a small solid rocket motor according to claim 1, characterized in that: The load-bearing plate (9) is provided with sensor connection holes.

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