A fixture for solid rocket motor insulation solution cavitation jet test

Abstract

The application discloses a clamp for solid engine heat insulation layer solution cavitation jet test, which comprises a base, a left support plate, a right support plate, a baffle, a lifting clamping plate, a lifting table, an operating handle and a rotating baffle; the base is a rectangular flat plate structure, and the upper surface is respectively provided with the left support plate, the right support plate and the baffle; the lifting clamping plate is arranged on the left support plate; the lifting table, the operating handle and the rotating baffle are arranged above the right support plate. The clamp has the advantages of reasonable structure, simple operation and high test efficiency, can conveniently replace the test sample in the solid engine heat insulation layer solution cavitation jet test, reduces the influence of water pressure dynamic pressure on the test sample, and thus improves the test precision and safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of auxiliary tools for solid rocket motor insulation solution cavitation jet test, in particular to a clamp for solid rocket motor insulation solution cavitation jet test. BACKGROUND

[0002] Solid rocket motor insulation solution cavitation jet test is an indispensable part of propellant performance verification, especially in the study of solution cavitation phenomenon, jet characteristics and the influence of solution on insulation.

[0003] In practical application, there are many deficiencies and defects, mainly in the following aspects:

[0004] I. Sample replacement is inconvenient

[0005] The existing test clamp usually needs to be manually taken out of the experimental water tank during the experiment to replace the sample. Because the sample needs to be completely taken out of the clamp and reinstalled when replacing the sample, the operation process is often limited by water pressure and the structure of the test equipment itself, and the fine adjustment of the position and angle of the sample is difficult, which will directly affect the continuity, accuracy, reliability and efficiency of the experiment.

[0006] II. Dynamic pressure affects accuracy:

[0007] During the solution cavitation jet test, when the electromagnetic valve is closed, the water pressure cannot be quickly released, resulting in dynamic pressure (shock wave). This dynamic pressure will have an adverse effect on the test sample, resulting in inaccurate experimental data.

[0008] III. Poor operation safety:

[0009] The existing clamp design usually does not take into account the contact of the operator with the equipment during the experiment. Especially in a high water pressure environment, the adjustment of the test clamp and the replacement of the sample need to be manually operated, which may increase the risk of the operator. In addition, because the operation during the test usually needs to adjust the water flow or control the position of the baffle, manual operation has certain unpredictability, which is easy to cause equipment damage or personnel injury.

[0010] The design of the test equipment directly affects the accuracy and safety of the test.

[0011] The existing clamp design has the following problems:

[0012] I. The sample needs to be replaced frequently during the experiment, but the existing clamp structure is not suitable for underwater work (usually replaced by ordinary flat tongs), which needs to be taken out of the water tank for sample replacement, increasing the complexity and time consumption of the experiment.

[0013] Second, the water pressure in the experimental water tank is not easy to control, and after the electromagnetic valve is closed, the water pressure is not released in time, which is easy to produce dynamic pressure influence, thereby affecting the accuracy of the test results, and the existing clamp cannot effectively block the influence of the first wave of cavitation jet on the test piece.

[0014] Third, during the test operation process, there is a lack of convenient control mechanism, and the operator needs to take manual adjustment and calibration of the clamp position so that the nozzle can be directly opposite to the center, which increases unnecessary safety risks and unpredictability. SUMMARY

[0015] In order to overcome the defects existing in the prior art, the present application provides a clamp for solid rocket motor insulation solution cavitation jet test, which can conveniently replace the test sample in the solid rocket motor insulation solution cavitation jet test and reduce the influence of water pressure dynamic pressure on the test sample, thereby improving the precision and safety of the test.

[0016] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0017] A clamp for solid rocket motor insulation solution cavitation jet test, comprising a base 1, a left support plate 2, a right support plate 3, a baffle 4, a lifting clamping plate 5, an operating handle 6, a rotating baffle 7 and a lifting platform 8.

[0018] The base 1 is a rectangular flat structure, and the upper surface is respectively provided with the left support plate 2, the right support plate 3 and the baffle 4. The left support plate 2 and the right support plate 3 are oppositely arranged, and the baffle 4 is arranged at the outer bottom of the right support plate 3 to limit the movement of the right support plate 3. The lifting clamping plate 5 is installed on the left support plate 2. The lifting platform 8, the operating handle 6 and the rotating baffle 7 are installed above the right support plate 3.

[0019] There are two grooves on the surface of the base 1, one on the left side and one on the right side. The shape of the left side rectangular groove on the surface of the base 1 is the same as that of the bottom of the left support plate 2, which is used to put the left support plate 2 into the groove. At the same time, two threaded holes are provided at the bottom of the left side, and the base 1 and the support plate 2 are connected by bolts. The shape of the right side groove on the surface of the base 1 is the same as that of the baffle 4, which is used to put the baffle 4 into the groove. At the same time, two threaded holes are provided at the bottom of the right side, and the base 1 and the baffle 4 are connected by bolts.

[0020] The left support plate 2 is a vertical rectangular plate structure, and the bottom is provided with a threaded hole, which is connected with the left side rectangular groove of the base 1 by two bolts. A rectangular recessed clamping groove is provided on the right side surface of the left support plate 2, and the lifting clamping plate 5 is installed in the rectangular recessed clamping groove.

[0021] The lifting clamping plate 5 is a vertical I-shaped structure, and the top end is provided with a handle and the bottom end is provided with a rectangular clamping protrusion.

[0022] The lifting card plate 5 is installed in the rectangular recessed clamping groove on the right side surface of the left supporting plate 2, and is pulled by the top handle of the lifting card plate 5 to slide up and down in the sliding groove. When it slides to the lowermost end, the rectangular clamping protrusion at the bottom of the lifting card plate 5 is fitted with the rectangular through hole on the upper surface of the base 1 and the rectangular through hole on the surface of the right supporting plate 3, so as to lock the position of the right supporting plate 3 and ensure the accurate position of the test piece.

[0023] The right supporting plate 3 is a vertical L-shaped plate structure, and four recessed clamping grooves are arranged at the bottom of the vertical L-shaped plate structure and fitted with the four protruding clamping grooves arranged on the upper surface of the base 1, so as to move freely in the transverse direction. The rectangular recessed clamping groove is arranged on the left side surface of the right supporting plate 3, and the lifting platform 8 can be installed in the rectangular recessed clamping groove. The right supporting plate 3 is a vertical L-shaped plate structure, and a through hole is arranged at the upper left of the vertical L-shaped plate structure, which is used for installing the operating handle 6 and the rotating baffle 7.

[0024] The rectangular hole is arranged on the left side of the upper surface of the base 1, and when the right supporting plate 3 slides to the leftmost end along the sliding groove of the base 1, the left side rectangular hole is aligned with the rectangular hole on the upper surface of the base 1, and the rectangular clamping protrusion at the bottom of the lifting card plate 5 can pass through the two holes to achieve the purpose of locking the position of the right supporting plate 3. The rectangular recess is arranged on the surface of the right supporting plate 3, which is fitted with the pattern platform at the bottom of the lifting platform 8, so that the position of the lifting platform 8 can be fixed when it falls to the position.

[0025] The lifting platform 8 is a vertical L-shaped plate structure, and the top end is provided with a handle. The bottom plane is a pattern platform, and the platform is provided with a scale indication. The experimental pattern is fixed on the platform, which can ensure the accurate position of the pattern.

[0026] The lifting platform 8 is installed in the rectangular recessed clamping groove of the right supporting plate 3, and the top handle of the lifting platform 8 is pulled to slide up and down in the sliding groove.

[0027] When it slides to the uppermost end, the test sample can be replaced without taking out the clamp in the experiment; when it slides to the lowermost end, the pattern platform is embedded in the rectangular recess on the surface of the right supporting plate 3, so as to ensure the fixed position.

[0028] The rotating baffle 7 includes a rectangular baffle at the bottom. The length of the rectangular baffle is defined as the X-axis direction, and the width is defined as the Y-axis direction. A cylindrical structure one is arranged on the Z-axis direction of the rectangular baffle. A cylindrical structure two is arranged on the top of the cylindrical structure one along the Y-axis direction. A cylindrical structure three is arranged on the other end of the cylindrical structure two along the X-axis direction. The cylindrical structure three is connected with the operating handle 6 through threads at the through hole on the upper left of the right supporting plate 3. A gasket 9 is arranged at the connection position.

[0029] The rotating baffle 7 is used to resist the dynamic pressure (shock wave) generated by the closing of the electromagnetic valve during the cavitation jet test of the solid rocket engine insulation solution, thereby reducing the influence of the water pressure dynamic pressure generated after the closing of the electromagnetic valve on the test sample, finding the optimal cavitation jet state, and the one end of the operating handle 6 is provided with a threaded hole, and the other end is provided with a handle.

[0030] The operating handle 6 and the rotating baffle 7 are installed at the left upper circular hole of the right supporting plate 3, the operating handle 6 is connected with the rotating baffle 7 at the through hole through threads, and the rotating baffle 7 is provided with a gasket 9 at the contact surface with the right supporting plate 3, so as to ensure that the two are connected tightly and maintain greater friction with the right supporting plate 3.

[0031] When the handle on one side of the operating handle 6 is turned, the rectangular baffle at one end of the rotating baffle 7 is turned, and when it is turned to be parallel to the pattern platform at the bottom end of the lifting platform 8, the dynamic pressure (shock wave) generated by the closing of the electromagnetic valve during the cavitation jet test of the solid rocket engine insulation solution can be resisted, thereby reducing the influence of the water pressure dynamic pressure generated after the closing of the electromagnetic valve on the test sample, and the optimal cavitation jet state can be found. After the jet is stable, the operating handle 6 is turned until the rectangular baffle at one end of the rotating baffle 7 is perpendicular to the pattern platform at the bottom end of the lifting platform 8, at which time the jet experiment can be normally carried out.

[0032] The baffle 4 is a rectangular plate structure, provided with two threaded holes, the baffle 4 is installed in the right groove of the base 1 and connected with the base 1 through two bolts, when the right supporting plate 3 is connected with the sliding groove of the base 1, the baffle 4 is fixed on the right groove of the base 1 through the bolts, so as to limit the Y-axis freedom degree and ensure that the right supporting plate 3 does not fall off the base 1.

[0033] Integrated design of the clamp: the rotating baffle 7 and the lifting platform 8 of the clamp are combined with the clamp body through the right supporting plate 3, so that the sample replacement and dynamic pressure blocking can be carried out without disassembly, which avoids the trouble of taking out the clamp from the water tank every time in the traditional design, improves the test efficiency, effectively blocks the water pressure dynamic pressure and improves the experimental precision.

[0034] The beneficial effects of the present application are as follows:

[0035] 1. Improve the efficiency and precision of the experiment: the integrated clamp design does not need to take out the clamp to replace the sample, and the sample position does not need to be calibrated after the sample is replaced, thereby improving the experimental efficiency and precision.

[0036] 2. Reduce the influence and interference of dynamic pressure: the rotating baffle 7 can resist the dynamic pressure (shock wave) generated by the closing of the electromagnetic valve during the cavitation jet test of the solid rocket engine insulation solution, thereby reducing the influence of the water pressure dynamic pressure generated after the closing of the electromagnetic valve on the test sample, and ensuring the accuracy of the experimental results.

[0037] 3. Improve the safety and convenience of operation: can be outside the water tank control handle 6, so that the operation is more convenient and safe, to avoid the experimental operation may cause equipment damage or injury.

[0038] 4. The clamp structure is simple and convenient to operate: the bidirectional sliding groove design of the base 1 and the adjustability of the lifting platform 8 make the clamp can flexibly cope with different test requirements, convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The whole structure of the present application is shown Figure One .

[0040] Figure 2 The whole structure of the present application is shown Figure Two .

[0041] Figure 3 The whole structure of the present application is shown Figure Three .

[0042] Figure 4 The base 1 structure diagram.

[0043] Figure 5 The left support plate 2 structure diagram.

[0044] Figure 6 The right support plate 3 structure diagram.

[0045] Figure 7 The rotating baffle 7 structure diagram.

[0046] Figure 8 The handle 6 structure diagram.

[0047] Figure 9 The experimental operation structure diagram.

[0048] Figure 10 The clamp working state one is shown Figure One .

[0049] Figure 11 The clamp working state one is shown Figure Two .

[0050] Figure 12 The clamp working state one is shown Figure Three .

[0051] Figure 13 The clamp working state two is shown Figure One .

[0052] Figure 14 The clamp working state two is shown Figure Two .

[0053] Figure 15 schematic diagram of the working state two of the clamp Figure Three . DETAILED DESCRIPTION

[0054] The application will be described in further detail below with reference to the drawings.

[0055] A clamp for solid motor insulation solution cavitation jet test, relates to propellant testing technology field. Including base 1, left support plate 2, right support plate 3, baffle 4, lifting card plate 5, operating handle 6, rotating baffle 7 and lifting platform 8, the base 1 is provided with bidirectional sliding groove, the left support plate 2 is connected through bolt at the left end of the base 1, connects the lifting card plate 5, the right support plate 3 is connected with the base 1 through the sliding groove, lifting platform 8 is arranged on the right support plate 3 at the same time, operating handle 6 and rotating baffle 7 are arranged at the left upper corner of the right support plate 3, the baffle 4 is arranged at the right side of the right support plate 3, and is connected with the base 1 through bolt.

[0056] The surface of the base 1 has two recesses, respectively on the left side and the right side, the shape of the rectangular recess on the left side of the surface of the base 1 is the same as that of the bottom of the left support plate 2, which is used to put the left support plate 2 into the recess, at the same time, two threaded holes are arranged at the bottom of the left side, and the base 1 is connected with the support plate 2 through bolt; the shape of the recess on the right side of the surface of the base 1 is the same as that of the baffle 4, which is used to put the baffle 4 into the recess, at the same time, two threaded holes are arranged at the bottom of the right side, and the base 1 can be connected with the baffle 4 through bolt.

[0057] The left support plate 2 is a vertical rectangular plate structure, the bottom is provided with a threaded hole, and the left side of the base 1 is connected with the left support plate 2 through two bolts in the rectangular recess; the right side surface of the left support plate 2 is provided with a rectangular recessed clamping groove, and the lifting card plate 5 is installed in the rectangular recessed clamping groove;

[0058] The lifting card plate 5 is a vertical I-shaped structure, the top end is provided with a handle, and the bottom end is provided with a rectangular clamping protrusion.

[0059] The lifting card plate 5 is installed in the rectangular recessed clamping groove of the left support plate 2, the rectangular recessed clamping groove is located at the right side surface of the left support plate 2, the handle at the top end of the lifting card plate 5 is pulled to make it slide up and down in the sliding groove, when it slides to the lowermost end, the rectangular clamping protrusion at the bottom end of the lifting card plate 5 is matched with the rectangular through hole on the upper surface of the base 1 and the rectangular through hole on the surface of the right support plate 3, so that the position of the right support plate 3 is locked, and the position of the test piece is ensured to be accurate.

[0060] The right support plate 3 is a vertical L-shaped plate structure, and the bottom is provided with four recessed clamping grooves which are matched with the four protruding clamping grooves arranged on the upper surface of the base 1 and can move freely in the transverse direction; the left surface of the right support plate 3 is provided with a rectangular recessed clamping groove, and a lifting platform 8 can be installed at the rectangular recessed clamping groove; the right support plate 3 is a vertical L-shaped plate structure, and a through hole is arranged at the upper left of the vertical L-shaped plate structure for installing an operating handle 6 and a rotating baffle 7;

[0061] The left side of the upper surface of the base 1 is provided with a rectangular hole, when the right support plate 3 is slid along the sliding groove of the base 1 to the leftmost end, the left side rectangular hole is aligned with the upper surface rectangular hole of the base 1, and the rectangular clamping protrusion at the bottom end of the lifting clamping plate 5 can pass through the two holes to achieve the purpose of locking the position of the right support plate 3; the surface of the right support plate 3 is provided with a rectangular recess, which is matched with the style platform at the bottom of the lifting platform 8, and when the lifting platform 8 falls to the position, the position of the lifting platform 8 can be fixed.

[0062] The lifting platform 8 is a vertical L-shaped plate structure, the top end is provided with a handle, the bottom end is a style platform, the platform is provided with a scale indication, and the experimental style is fixed on the platform, so that the position of the style is accurate.

[0063] The lifting platform 8 is installed in the rectangular recessed clamping groove of the right support plate 3, and the lifting platform 8 is slid up and down in the sliding groove by pulling the handle at the top end of the lifting platform 8.

[0064] The working principle of the present application is as follows:

[0065] In the solid rocket engine heat insulation layer solution cavitation jet test, the base 1 is fixed on the bottom of the experimental water tank by bolts or adhesion, and the left support plate 2, the right support plate 3, the lifting clamping plate 5, one third of the height of the lifting platform 8 and the operating handle 6 are exposed to the water surface;

[0066] When the experimental water tank is filled with water and ready to start the test, the upper end handle of the lifting platform 8 is controlled to be submerged into the recess on the surface of the right support plate 3, and the right support plate 3 is pushed to the leftmost end, and the top end handle of the lifting clamping plate 5 is pushed to the lowermost end, so that the rectangular clamping protrusion at the bottom end of the lifting clamping plate 5 is embedded into the rectangular holes on the upper surface of the base 1 and the surface of the right support plate 3, the position of the right support plate 3 is locked, the high-pressure pump valve and the electromagnetic valve on the operation table are opened, the position of the water flow hitting the style platform at the bottom end of the lifting platform 8 is observed, and the scale is recorded.

[0067] The high-pressure pump valve and the electromagnetic valve are closed, the lifting clamping plate 5 is lifted, the right support plate 3 is moved to the right, and the upper end handle of the lifting platform 8 is pulled to expose the style platform at the bottom end to the water surface, and the style is fixed on the style platform according to the center position of the water flow recorded just now and according to the experimental requirements. The position of the test piece is locked by repeating the previous operation to ensure the accuracy of the position of the test piece.

[0068] In the experiment, due to the water pressure can not be released after closing the electromagnetic valve, a dynamic pressure will be generated, resulting in the water pressure of the jet flow from the nozzle 12 is the combination of the steady pressure and the dynamic pressure when it just works, the influence of the dynamic pressure on the test sample needs to be eliminated.

[0069] Therefore, before the experiment starts, by rotating the rotating operation handle 6, the rectangular baffle at one end of the baffle 7 will rotate with it, and stop when it is parallel to the pattern platform at the bottom end of the lifting platform 8. After the experiment starts, the rectangular baffle can resist the dynamic pressure (shock wave) generated at the moment of closing the electromagnetic valve during the cavitation jet test of the solid rocket motor insulation layer solution, thereby reducing the influence of the water pressure dynamic pressure generated after the electromagnetic valve is closed on the test sample, and finding the optimal cavitation jet state. After the jet flow is stable, operate the handle 6 until the rectangular baffle is perpendicular to the pattern platform at the bottom end of the lifting platform 8, at which time the jet flow test can be normally carried out. Since the operation handle 6 controlling the rectangular baffle is outside the water tank, the safety and convenience of operation during the experiment can be ensured.

[0070] After the experiment is completed, the lifting platform 8 can still be operated to replace the pattern fixed in the center of the lifting platform 8, avoiding taking out the entire clamp from the water tank to replace the pattern;

[0071] After replacing the pattern, operating according to the previous pattern fixing position can ensure the position of the pattern, avoiding the need to calibrate the position after replacing the pattern, and ensuring the accuracy and reliability of the experiment.

[0072] As shown in Figure 9 , the test steps are:

[0073] 1) Place the clamp at the bottom of the water tank, and fill the water tank with water.

[0074] 2) Operate the upper handle of the lifting platform 8 to sink it into the groove on the surface of the right support plate 3, then push the right support plate 3 to the leftmost end, and at the same time, push the top handle of the lifting clamping plate 5 to slide it to the lowermost end, so that the rectangular clamping protrusion at the bottom end of the lifting clamping plate 5 is embedded into the rectangular hole on the upper surface of the base 1 and the rectangular hole on the surface of the right support plate 3, locking the position of the right support plate 3, i.e. fixing the position of the lifting platform 8, i.e. fixing the position of the test piece platform, and adjusting the distance between the nozzle 12 and the test piece platform by adjusting the lifting button on the operation table;

[0075] 3) Open the high-pressure water pump valve and the electromagnetic valve on the operation table, and at the same time, observe the pressure display on the operation table while turning the pressure adjusting valve clockwise. When the required pressure is reached, close the high-pressure water pump valve and the electromagnetic valve, and observe the position of the water flow impact on the pattern platform at the bottom end of the lifting platform 8, and record its scale;

[0076] 4) Lift the lifting plate 5, move the right support plate 3 to the right, and pull the upper handle of the lifting platform 8 so that its bottom sample platform is exposed above the water surface. In order to avoid the clamping and other fixing methods affecting the experimental effect of 10, the circular 10 (diameter 50mm and thickness 10mm) is glued to the scale of the water flow impacting the center point of the sample platform just recorded on the surface of the sample platform.

[0077] 5) Repeat step 2) to lock the right support plate at position 3 to ensure the specimen is in the correct position;

[0078] 6) Rotate the operating handle of the connecting rod 6 to rotate the rectangular baffle at one end of the rotating baffle 7 to be parallel to the sample platform at the bottom of the lifting platform 8. Open the high-pressure water pump valve and solenoid valve on the operating table. The rectangular baffle at one end of the rotating baffle 7 blocks the first wave of cavitation jet. After the pressure stabilizes, rotate the operating handle of the connecting rod 6 to rotate the rectangular baffle at one end of the rotating baffle 7 to be perpendicular to the sample platform at the bottom of the lifting platform 8. Use a stopwatch to time and control the flushing time.

[0079] 7) Simultaneously activate particle camera 11 to record the erosion effect during jet flow;

[0080] 8) After the cavitation jet reaches the designated time, close the solenoid valve, and then close the high-pressure water pump valve;

[0081] 9) Remove 10 and use a thickness gauge to measure the center thickness and edge thickness after the test;

[0082] 10) Repeat this step with 10.

[0083] Description of the two working states of the fixture:

[0084] like Figures 10-12 As shown, State 1: "Rotate the operating handle of the connecting rod 6 to rotate the rectangular baffle at one end of the rotating baffle 7 to be parallel to the sample platform at the bottom of the lifting platform 8, open the high-pressure water pump valve and solenoid valve on the operating table, and the rectangular baffle at one end of the rotating baffle 7 blocks the first wave of cavitation jet" - that is, the rotating baffle is parallel to the sample platform.

[0085] like Figures 13-15 As shown, State 2: "After the pressure stabilizes, rotate the operating handle of the connecting rod 6 to rotate the rectangular baffle at one end of the rotating baffle 7 to be perpendicular to the sample platform at the bottom of the lifting platform 8. Use a stopwatch to time and control the flushing time" - that is, the rotating baffle is perpendicular to the sample platform.

Claims

1. A fixture for testing cavitation jets of a solid rocket motor insulation layer solution, characterized in that, Includes a base (1), a left support plate (2), a right support plate (3), a baffle (4), a lifting plate (5), an operating handle (6), a rotating baffle (7), and a lifting platform (8); The base (1) is a rectangular flat plate structure. A left support plate (2), a right support plate (3) and a baffle (4) are respectively installed on the upper surface. The left support plate (2) and the right support plate (3) are arranged opposite to each other. The baffle (4) is located at the bottom outside the right support plate (3) to restrict the movement of the right support plate (3). A lifting plate (5) is installed on the left support plate (2). A lifting platform (8), an operating handle (6) and a rotating baffle (7) are installed above the right support plate (3). The right support plate (3) is a vertical L-shaped plate structure with four recessed slots at the bottom that fit with four raised slots on the upper surface of the base (1), allowing it to move freely in the lateral direction. The left side surface of the right support plate (3) has a rectangular recessed slot, where a lifting platform (8) can be installed. A through hole is provided on the upper left side of the vertical L-shaped plate structure for installing an operating handle (6) and a rotating baffle (7). A rectangular through hole is provided on the left side of the upper surface of the base (1). When the right support plate (3) slides along the raised slot of the base (1) to the leftmost end, the rectangular through hole on the left side of the right support plate (3) is aligned with the rectangular through hole on the upper surface of the base (1). The rectangular protrusion at the bottom of the lifting plate (5) passes through the two to lock the position of the right support plate (3). A rectangular groove is provided on the surface of the right support plate (3) to fit the pattern platform at the bottom of the lifting platform (8). When the lifting platform (8) falls to this position, its position can be fixed. The operating handle (6) and the rotating baffle (7) are installed at the upper left through hole of the right support plate (3). The operating handle (6) and the rotating baffle (7) are connected by threads at the through hole. A gasket (9) is provided at the contact surface between the rotating baffle (7) and the right support plate (3).

2. The fixture for testing cavitation jets of a solid rocket motor insulation layer solution according to claim 1, characterized in that, The base (1) has two grooves on its surface, one on the left and one on the right. The rectangular groove on the left side of the base (1) is the same shape as the bottom of the left support plate (2) and is used to place the left support plate (2) into the groove. At the same time, there are two threaded holes on the bottom of the left side, which are used to connect the base (1) and the support plate (2) with bolts. The groove on the right side of the base (1) is the same shape as the baffle (4) and is used to place the baffle (4) into the groove. At the same time, there are two threaded holes on the bottom of the right side, which are used to connect the base (1) and the baffle (4) with bolts.

3. The fixture for testing cavitation jets of a solid rocket motor insulation layer solution according to claim 1, characterized in that, The left support plate (2) is a vertical rectangular plate structure with a threaded hole at the bottom. It is connected to the base (1) in the rectangular groove on the left side by two bolts. The right side surface of the left support plate (2) is provided with a rectangular recessed slot, and a lifting plate (5) is installed in the rectangular recessed slot. The lifting plate (5) is a vertical I-shaped structure with a handle at the top and a rectangular protrusion at the bottom.

4. A fixture for testing cavitation jets of a solid rocket motor insulation layer solution according to claim 3, characterized in that, The lifting plate (5) is installed in the rectangular recessed slot of the left support plate (2). The rectangular recessed slot is located on the right side surface of the left support plate (2). By pulling the handle at the top of the lifting plate (5), it slides up and down in the rectangular recessed slot. When it slides to the bottom, the rectangular protrusion at the bottom of the lifting plate (5) matches the rectangular through hole on the upper surface of the base (1) and the rectangular through hole on the surface of the right support plate (3), locking the position of the right support plate (3) and ensuring the accurate position of the specimen.

5. A fixture for testing cavitation jets of a solid rocket motor insulation layer solution according to claim 1, characterized in that, The lifting platform (8) is a vertical L-shaped plate structure with a handle at the top and a sample platform at the bottom. The platform has scale indicators, and the experimental sample is fixed here to ensure the accurate position of the sample. The lifting platform (8) is installed in the rectangular recessed slot of the right support plate (3). By pulling the handle at the top of the lifting platform (8), it can slide up and down in the rectangular recessed slot. When the sample is slid to the top, it can be replaced without removing the clamp during the experiment; when it is slid to the bottom, the sample platform is embedded in the rectangular groove on the surface of the right support plate (3) to ensure that its position is fixed.

6. The fixture for testing cavitation jets of a solid rocket motor insulation layer solution according to claim 1, characterized in that, The rotating baffle (7) includes a rectangular baffle at the bottom. The length of the rectangular baffle is defined as the X-axis direction and the width as the Y-axis direction. A cylindrical structure one is set in the Z-axis direction of the rectangular baffle. A cylindrical structure two is set at the top of the cylindrical structure one along the Y-axis direction. A cylindrical structure three is set at the other end of the cylindrical structure two along the X-axis direction. The cylindrical structure three is connected to the operating handle (6) at the upper left through hole of the right support plate (3) by a thread. A gasket (9) is set at the connection. The rotating baffle (7) is used to block the dynamic pressure generated by the solenoid valve closing during the solid engine insulation layer solution cavitation jet test, thereby reducing the influence of the dynamic pressure generated after the solenoid valve closes on the test sample and finding the optimal cavitation jet state. The operating handle (6) has a threaded hole at one end and a handle at the other end.

7. The fixture for testing cavitation jets of a solid rocket motor insulation layer solution according to claim 1, characterized in that, The baffle (4) is a rectangular plate structure with two threaded holes. The baffle (4) is installed in the groove on the right side of the base (1) and connected to it by two bolts. After the right support plate (3) is connected to the protruding slot of the base (1), the baffle (4) is fixed to the groove on the right side of the base (1) by bolts to restrict its Y-axis freedom and ensure that the right support plate (3) does not fall off the base (1).

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