Pulse engine axial interlayer multi-performance prediction test device and method

Abstract

The invention discloses a multi-performance prediction test device for an axial interlayer of a pulse engine. The device comprises a soft interlayer, a fake explosive assembly, an igniter box, a central rod, a front seal head, a barrel, a rear seal head, a rear three-way adapter, a direct part, a front three-way adapter and a sealing ring, and the cylinder body, the rear sealing head, the false explosive assembly and the soft interlayer are connected to form a closed cavity. The device is simple and reliable in mechanical structure, low in cost and easy to maintain and replace parts; meanwhile, the soft interlayer in the test process is consistent with the soft interlayer in a real engine, the test measurement precision is high, multiple performances of the pulse engine interlayer are integrally and accurately predicted, test verification is provided for design improvement of the soft interlayer, the development period of the high-performance pulse engine is effectively shortened, and the test efficiency is improved. And a solid support is provided for the design and optimization of the soft interlayer of the pulse engine.

Description

Technical Field

[0001] The invention relates to the field of soft interlayers of pulse engines, and in particular to a multi-performance prediction device and method for axial interlayers of pulse engines. Background Art

[0002] The dual-pulse solid rocket engine can effectively improve the terminal velocity of the missile, increase the missile range, and facilitate flight control. As one of the key technologies of the pulse engine, the technical breakthrough of the interstage isolation technology has become the key to the engineering application of the pulse engine. The interstage isolation device mainly has two forms: compartment and interlayer. The interlayer structure has the advantages of simple structure, easy processing, and light negative mass. The interlayer structure of the interlayer pulse engine usually uses rubber material, which not only needs to have good insulation and airtightness, but also needs to be able to withstand the high-pressure gas during the first pulse operation, and at the same time, it needs to be able to be opened safely and reliably during the second pulse operation. Therefore, it is necessary to carry out the pulse engine interlayer multi-performance prediction test research. At present, the pulse engine interlayer multi-performance test research mainly adopts two methods: ground hot test and high-pressure cold air shock test. The hot test is costly and has a long cycle. For the test form of connecting the engine casing and the soft interlayer in the cold air shock test, the device is simple and can quickly and repeatedly test the single performance of the interlayer. However, when conducting test research on multiple performances, the tooling needs to be redesigned, and multiple tooling is required to carry out multi-performance prediction tests.

[0003] Therefore, a device is needed to accurately predict the multiple performances of the pulse engine interlayer in an integrated manner, provide experimental verification for the improvement of the soft interlayer design, improve the structural performance of the soft interlayer, effectively shorten the development cycle of high-performance pulse engines, and provide solid support for the design and optimization of the soft interlayer of the pulse engine. Summary of the invention

[0004] In order to effectively shorten the pulse engine development cycle and development cost and provide solid support for the performance design and optimization of the interlayer structure, the present invention provides an axial interlayer multi-performance prediction test device for a pulse engine. The device has a simple structure and is consistent with the state of the actual engine soft interlayer. It can perform integrated prediction tests on multiple performances such as air tightness, pressure bearing and opening performance during the operation of the pulse engine.

[0005] A pulse engine axial compartment multi-performance prediction test device, specifically:

[0006] A pulse engine axial interlayer multi-performance prediction test device comprises a soft interlayer, a dummy medicine assembly, an igniter box, a center rod, a front head, a cylinder, a rear head, a rear three-way adapter, direct parts, a front three-way adapter and a sealing ring; the cylinder, the rear head, the dummy medicine assembly and the soft interlayer are connected to form a closed cavity.

[0007] The two ends of the fake drug assembly are respectively bonded to the soft interlayer and the center rod; the fake drug assembly is bonded to the soft interlayer, specifically the covering sleeve in the fake drug assembly is bonded to the soft interlayer, and the bonding form is the same as the bonding position, material and interface of the covering sleeve and the soft interlayer of the real engine to provide a real engine environment.

[0008] The center hole of the front head is connected to the center rod in a threaded form.

[0009] The central rod is provided with an air inlet and an air inlet channel, so that the test gas enters the closed gap formed between the soft interlayer and the fake drug assembly and acts on the inner surface of the soft interlayer to simulate the effect of the combustion gas on the soft interlayer when the real engine is working in two pulses.

[0010] A front three-way adapter is installed at the air inlet of the center rod, which is used to connect an external gas source and a pressure detection device; one interface of the front three-way adapter is connected to the air inlet, and the other two interfaces are respectively used to connect an external gas source and a pressure detection device, so as to realize the injection of test gas and the monitoring of the opening pressure of the soft barrier or the monitoring of air tightness.

[0011] The inner surface diameter of the cylinder is the same as the maximum diameter of the outer surface of the fake drug assembly, and flanges are arranged on the outer walls of both ends; the flanges at both ends are respectively connected to the front head and the rear head in the form of flanges, and are fixed in place with directly attached parts.

[0012] The end surface of the flange facing the front head and the end surface facing the rear head are respectively provided with annular grooves; and sealing rings are provided in the annular grooves.

[0013] An air inlet is opened at the center hole of the rear head, and a rear three-way adapter is installed at the air inlet for connecting an external air source and a pressure detection device; one interface of the rear three-way adapter is connected to the air inlet, and the other two interfaces are respectively used to connect an external air source and a pressure detection device, so as to realize the injection of test gas and pressure monitoring of the pressure bearing performance of the soft interlayer.

[0014] The soft interlayer has the same structure, performance and material as those of a real engine soft interlayer, so as to provide a completely real engine environment; the fake drug assembly includes a covering sleeve, a lining and a fake drug, and the bonding form of the joints of each assembly is the same as the bonding position, material and interface in a real engine, so as to provide a completely real engine environment.

[0015] The present invention also provides a pulse engine axial insulation multi-performance prediction test method, specifically using the pulse engine axial insulation multi-performance prediction test device to conduct a simulation experiment, the method is as follows:

[0016] S1: First, carry out the prediction test of air tightness and pressure bearing performance of the soft interlayer; specifically: seal one of the two interfaces of the front three-way adapter at the air inlet of the center rod, and connect the other interface to the pressure detection device; connect the two interfaces of the rear three-way adapter at the air inlet of the center hole of the rear head to the external air source and the pressure detection device respectively.

[0017] S2: The test gas is introduced into the rear three-way adapter interface. During this period, the pressure data of the pressure detection devices at the front three-way adapter and the rear three-way adapter are collected in real time. When the external gas source pressure reaches the set soft interlayer bearing pressure and the set pressure bearing time, stop supplying gas.

[0018] S3: After stopping the air supply, the pressure test is completed and the rear head is removed; observe the condition of the soft interlayer. The pressure obtained by the pressure detection device at the center rod and the pressure obtained by the rear head pressure detection device can indicate the air tightness and pressure bearing performance of the soft interlayer. If the soft interlayer structure is intact and undamaged, and the pressure value obtained by the pressure detection device at the center rod does not continue to increase within the pressure bearing time, it indicates that the air tightness of the soft interlayer is good. At the same time, if the pressure value obtained by the rear head pressure detection device is within the set pressure within the pressure bearing time, it indicates that the pressure bearing performance of the soft interlayer meets the requirements.

[0019] S4: After removing the rear head, further carry out the soft interlayer opening performance prediction test; connect the two interfaces of the front three-way adapter at the center rod air inlet to the external air source and the pressure detection device respectively.

[0020] S5: Introduce test gas into the front three-way adapter interface of the center rod connected to the external gas source until the weak part of the soft interlayer opens, completing the soft interlayer opening performance prediction test; at this time, the opening pressure obtained by the center rod pressure detection device is the opening pressure of the weak part of the soft interlayer, and the damage form is the damage situation at the weak part of the soft interlayer.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0022] (1) The device of the present invention has a simple and reliable mechanical structure, low cost, and is easy to maintain and replace parts;

[0023] (2) The device of the present invention can perform integrated predictive tests on multiple properties such as air tightness, pressure resistance and opening performance. During the test, the soft interlayer is consistent with the soft interlayer in the real engine, and the test measurement accuracy is high.

[0024] (3) The device simulates the pressure-bearing and opening processes of the soft interlayer in a real engine. The measurement results can provide accurate test results for the deformation of the soft interlayer during the pressure-bearing process and the establishment of the rubber material failure criterion model in the simulation analysis of the opening process, providing strong support for structural design improvement and computational simulation verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a pulse engine axial partition multi-performance prediction test device in an embodiment of the present application.

[0026] Explanation of the reference numerals: 1 is a soft interlayer; 2 is a fake medicine assembly; 3 is an igniter box; 4 is a center rod; 5 is a front end cap; 6 is a cylinder; 7 is a rear end cap; 8 is a rear three-way adapter; 9 is a direct part; 10 is a front three-way adapter; 11 is a sealing ring.

[0027] Specific implementation methods

[0028] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] The present invention provides a pulse engine axial interlayer multi-performance prediction test device, comprising a soft interlayer 1, a fake medicine assembly 2, an igniter box 3, a center rod 4, a front head 5, a cylinder 6, a rear head 7, a rear three-way adapter 8, a direct part 9, a front three-way adapter 10 and a sealing ring 11; the cylinder 6, the rear head 7, the fake medicine assembly 2 and the soft interlayer 1 are connected to form a closed cavity.

[0030] The two ends of the fake drug assembly 2 are respectively bonded to the soft interlayer 1 and the center rod 4; the fake drug assembly 2 is bonded to the soft interlayer 1, specifically, the covering sleeve in the fake drug assembly is bonded to the soft interlayer 1, and the bonding form is the same as the bonding position, material and interface of the covering sleeve and the soft interlayer 1 of the real engine, so as to provide a real engine environment.

[0031] The center hole of the front head 5 is connected to the center rod 4 in a threaded form.

[0032] The central rod 4 is provided with an air inlet and an air inlet channel, so that the test gas enters the closed gap formed between the soft interlayer 1 and the fake drug assembly 2, and acts on the inner surface of the soft interlayer 1, so as to simulate the effect of the combustion gas on the soft interlayer when the real engine is working in two pulses.

[0033] A front three-way adapter 10 is installed at the air inlet of the center rod 4 for connecting an external gas source and a pressure detection device; one interface of the front three-way adapter 10 is connected to the air inlet, and the other two interfaces are respectively used to connect an external gas source and a pressure detection device to achieve the injection of test gas and the monitoring of the opening pressure of the soft barrier or the monitoring of air tightness.

[0034] The inner diameter of the cylinder 6 is the same as the maximum diameter of the outer surface of the fake drug assembly 2, and flanges are provided on the outer walls of both ends; the flanges at both ends are respectively connected to the front head 5 and the rear head 7 in the form of flanges, and are fixed in place with direct parts 9.

[0035] The end surface of the flange facing the front head 5 and the end surface facing the rear head 7 are respectively provided with annular grooves; and a sealing ring 11 is provided in the annular groove.

[0036] An air inlet is opened at the center hole of the rear head 7, and a rear three-way adapter 8 is installed at the air inlet for connecting an external air source and a pressure detection device; one interface of the rear three-way adapter 8 is connected to the air inlet, and the other two interfaces are respectively used to connect an external air source and a pressure detection device, so as to realize the injection of test gas and pressure monitoring of the pressure bearing performance of the soft interlayer.

[0037] The soft interlayer 1 has the same structure, performance and material as the soft interlayer of a real engine, so as to provide a completely real engine environment; the fake drug assembly 2 includes a covering sleeve, a lining layer and a fake drug, and the bonding form of the joints of each assembly is the same as the bonding position, material and interface in the real engine, so as to provide a completely real engine environment.

[0038] The present invention also provides a pulse engine axial insulation multi-performance prediction test method, specifically using the pulse engine axial insulation multi-performance prediction test device to conduct a simulation experiment, the method is as follows:

[0039] S1: First, carry out the prediction test of the air tightness and pressure bearing performance of the soft interlayer; specifically: seal one of the two interfaces of the front three-way adapter 10 at the air inlet of the center rod 4, and connect the other interface to the pressure detection device; the two interfaces of the rear three-way adapter 8 at the air inlet of the center hole of the rear head 7 are respectively connected to the external air source and the pressure detection device.

[0040] S2: The test gas is introduced into the interface of the rear three-way adapter 8. During this period, the pressure data of the pressure detection devices at the front three-way adapter 10 and the pressure detection devices at the rear three-way adapter 8 are collected in real time. When the pressure of the external gas source reaches the set soft interlayer bearing pressure and the set pressure bearing time, the gas supply is stopped.

[0041] S3: After stopping the air supply, the pressure test is completed and the rear head 7 is removed; observe the condition of the soft interlayer, and the pressure obtained by the pressure detection device at the center rod 4 and the pressure obtained by the pressure detection device at the rear head 7 can indicate the air tightness and pressure bearing performance of the soft interlayer 1; if the structure of the soft interlayer 1 is intact and undamaged, and the pressure value obtained by the pressure detection device at the center rod 4 does not continue to increase within the pressure bearing time, it indicates that the air tightness of the soft interlayer 1 is good; at the same time, if the pressure value obtained by the pressure detection device of the rear head 7 is within the set pressure within the pressure bearing time, it indicates that the pressure bearing performance of the soft interlayer 1 meets the requirements.

[0042] S4: After removing the rear end cover 7, further carry out the opening performance prediction test of the soft interlayer 1; connect the two interfaces of the front three-way adapter 10 at the air inlet of the center rod 4 to the external air source and the pressure detection device respectively.

[0043] S5: Introduce test gas into the front three-way adapter 10 interface of the center rod 4 connected to the external gas source until the weak point of the soft interlayer 1 is opened, thereby completing the opening performance prediction test of the soft interlayer 1; at this time, the opening pressure obtained by the pressure detection device of the center rod 4 is the opening pressure of the weak point of the soft interlayer 1, and the damage form is the damage situation at the weak point of the soft interlayer 1.

[0044] The embodiments of the present invention described above are only used to help explain the present invention. These embodiments are selected and specifically described in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification, which all belong to the protection scope of the present invention.

Claims

1. A pulse engine axial interlayer multi-performance prediction test device, characterized in that: It comprises a soft interlayer (1), a fake medicine assembly (2), an igniter box (3), a center rod (4), a front end cover (5), a cylinder (6), a rear end cover (7), a rear three-way adapter (8), a direct part (9), a front three-way adapter (10) and a sealing ring (11); the cylinder (6), the rear end cover (7), the fake medicine assembly (2) and the soft interlayer (1) are connected to form a closed cavity; The two ends of the fake drug assembly (2) are respectively bonded to the soft interlayer (1) and the center rod (4); the fake drug assembly (2) is bonded to the soft interlayer (1), specifically, the covering sleeve in the fake drug assembly is bonded to the soft interlayer (1), and the bonding form is the same as the bonding position, material and interface of the covering sleeve and the soft interlayer (1) of the real engine, so as to provide a real engine environment; The center hole of the front head (5) is connected to the center rod (4) in a threaded manner; The central rod (4) is provided with an air inlet and an air inlet channel, so that the test gas enters the closed gap formed between the soft interlayer (1) and the fake drug assembly (2) and acts on the inner surface of the soft interlayer (1) to simulate the effect of the gas on the soft interlayer when the real engine is working in two pulses; The inner diameter of the cylinder (6) is the same as the maximum diameter of the outer surface of the fake drug assembly (2), and flanges are provided on the outer walls of both ends; the flanges at both ends are respectively connected to the front head (5) and the rear head (7) in the form of flanges, and are fixed in place by directly attached parts (9).

2. A pulse engine axial interlayer multi-performance prediction test device as claimed in claim 1, characterized in that: A front three-way adapter (10) is installed at the air inlet of the central rod (4) for connecting an external air source and a pressure detection device; one interface of the front three-way adapter (10) is connected to the air inlet, and the other two interfaces are respectively used to connect the external air source and the pressure detection device, so as to realize the injection of test gas and the monitoring of the opening pressure of the soft barrier or the monitoring of air tightness.

3. The pulse engine axial interlayer multi-performance prediction test device according to claim 1, characterized in that: The end surface of the flange facing the front head (5) and the end surface facing the rear head (7) are respectively provided with annular grooves; and a sealing ring (11) is provided in the annular groove.

4. The pulse engine axial interlayer multi-performance prediction test device according to claim 1, characterized in that: An air inlet is provided at the center hole of the rear sealing head (7), and a rear three-way adapter (8) is installed at the air inlet for connecting an external air source and a pressure detection device; one interface of the rear three-way adapter (8) is connected to the air inlet, and the other two interfaces are respectively used to connect an external air source and a pressure detection device, so as to realize the injection of test gas and the pressure monitoring of the pressure bearing performance of the soft interlayer.

5. The pulse engine axial interlayer multi-performance prediction test device according to claim 1, characterized in that: The soft interlayer (1) is identical in structure, performance and material to the soft interlayer of a real engine, so as to provide a completely real engine environment; the fake drug assembly (2) comprises a covering sleeve, a lining layer and fake drugs, and the bonding form at the joints of each assembly is identical in bonding position, material and interface to the real engine, so as to provide a completely real engine environment.

6. The pulse engine axial interlayer multi-performance prediction test device according to any one of claims 1 to 5, characterized in that: The steps for using the test device are as follows: S1: One of the two interfaces of the front three-way adapter (10) at the air inlet of the center rod (4) is sealed, and the other interface is connected to a pressure detection device; the two interfaces of the rear three-way adapter (8) at the air inlet of the center hole of the rear sealing head (7) are respectively connected to an external air source and a pressure detection device; S2: introducing the test gas into the interface of the rear three-way adapter (8), during which the pressure data of the pressure detection device at the front three-way adapter (10) and the pressure detection device at the rear three-way adapter (8) are collected in real time. When the pressure of the external gas source reaches the set soft interlayer bearing pressure and the set pressure bearing time, stop supplying gas; S3: After the air supply is stopped, the pressure test is completed and the rear head (7) is removed; the condition of the soft interlayer is observed. The pressure obtained by the pressure detection device at the center rod (4) and the pressure obtained by the pressure detection device at the rear head (7) can indicate the air tightness and pressure bearing performance of the soft interlayer (1); S4: After removing the rear end cover (7), further carry out the opening performance prediction test of the soft barrier (1); connect the two interfaces of the front three-way adapter (10) at the air inlet of the center rod (4) to the external air source and the pressure detection device respectively; S5: The test gas is introduced into the interface of the front three-way adapter (10) connected to the external gas source of the central rod (4) until the weak part of the soft interlayer (1) opens, thereby completing the opening performance prediction test of the soft interlayer (1); at this time, the opening pressure obtained by the pressure detection device of the central rod (4) is the opening pressure of the weak part of the soft interlayer (1), and the damage form is the damage condition of the weak part of the soft interlayer (1).

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