Pressure-bearing opening performance detection tester for pulse engine hard isolation device

Abstract

The utility model relates to a pulse engine hard isolation device pressure-bearing opening performance detection tester, which comprises a left tool, a right tool, a standard engine, a heat insulation screw ring, a top cover and an isolation device, and is characterized in that the isolation device is arranged between the left tool and the right tool, and the left tool and the right tool are connected through a flange to form an isolation device fixing tool; the standard engine is arranged on the side, needing to bear pressure, of the isolation device, the heat insulation screw ring is installed on the other side, and the top cover is connected with the standard engine. Limiting steps matched with the isolation device are arranged on the inner circumferential walls of the large ends of the openings of the left tool and the right tool so that the left tool and the right tool can be tightly connected. Large opening threads are arranged at the small opening ends of the left tool and the right tool, so that a standard engine and a heat insulation screw ring are convenient to install. The tester provided by the utility model is simple and small in structure and convenient in general assembly, can conveniently utilize the existing standard engine shell as a tool to carry out cold-state pressure-bearing and hot-state opening performance detection, greatly shortens the test period, and saves manpower and economic cost.

Description

Technical Field

[0001] The utility model relates to the technical field of pulse engine testing, in particular to a pulse engine hard isolation device pressure-bearing opening performance detection tester. Background Art

[0002] As a key component of the pulse engine, the isolation device is not only required to meet the requirements of thermal insulation and pressure resistance to withstand the high temperature and high pressure gas during the operation of pulse I, but also to be able to reliably open during pulse II operation, so that the high temperature and high pressure gas generated by the pulse II combustion chamber can smoothly pass through the pulse isolation device, then fill the pulse I combustion chamber, and finally be ejected after acceleration through the nozzle to obtain secondary thrust. While meeting the conditions for the use of the isolation device, it is necessary to rationally select lightweight component materials and compact inter-stage isolation methods, which are crucial to reducing the negative mass of the pulse engine. This requires the design of a new and simple isolation device pressure and opening performance tester to facilitate rapid and multiple iterations during the isolation device design process, while also facilitating the performance testing of each batch of isolation devices.

[0003] Existing isolation device pressure and opening performance testers are commonly used thick-walled testers with complex structures, large sizes, and relatively heavy weights. Furthermore, assembly of the tester is complex, difficult, and time-consuming. During the hot opening process, a square billet of a charge (cut by hand) must be attached to the inner wall of the tester. This process, when performed using the billet, exhibits poor consistency and severely absorpts thermal insulation, impacting interior ballistics when reused. Furthermore, the tester utilizes a flanged bolt connection structure with a high number of bolts, making assembly complex and labor-intensive. Summary of the Invention

[0004] Based on the above technical problems, the utility model proposes a pulse engine hard isolation device pressure opening performance detection tester to solve the problems of complex structure, large workload and high cost of existing testers.

[0005] In order to solve the above technical problems, one of the purposes of the present utility model is to provide a pulse engine hard isolation device pressure-bearing opening performance detection tester, the tester includes: a left tooling, a right tooling, a standard engine, an insulating screw ring, a top cover and an isolation device, the isolation device is arranged between the left tooling and the right tooling, the left tooling and the right tooling are connected by a flange to form an isolation device fixed tooling; the standard engine is arranged on the side of the isolation device that needs to bear pressure, and the insulating screw ring is installed on the other side, and the top cover is connected to the standard engine.

[0006] Furthermore, the inner peripheral walls of the large ends of the openings of the left tooling and the right tooling are provided with limiting steps that cooperate with the isolation device to ensure a tight connection.

[0007] Furthermore, the small opening ends of the left tooling and the right tooling are provided with large opening threads, which are convenient for installing a standard engine and an insulating screw ring.

[0008] Furthermore, the inner circumferential walls of the left tooling and the right tooling are provided with a plurality of limit blocks along the circumferential direction to fix the isolation device.

[0009] Furthermore, the entire tester tooling is made of steel.

[0010] Furthermore, the sealing method of the connection part between the fixing fixture of the isolation device and the standard engine is consistent with that of the standard engine.

[0011] The above-mentioned one or more technical solutions of the present invention have at least one or more of the following technical effects: The present invention provides a simple and efficient isolation device pressure-bearing opening performance tester. The tester has a simple and compact structure and is easy to assemble. It can conveniently use the existing standard engine casing as a tooling to perform cold pressure-bearing and hot opening performance tests. At the same time, it eliminates the previous process of hot opening by pasting square blanks on the inner wall of the tester. It directly connects to the standard engine through a large-opening thread and uses the standard engine for hot opening, which greatly shortens the test cycle and saves manpower and economic costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : Schematic diagram of the performance tester for the hard isolation device of the pulse engine of the utility model;

[0013] Figure 2 : Schematic diagram of the left and right tooling of the isolation device pressure-bearing and opening tester;

[0014] Figure 3 : Flowchart of the tester for testing the pressure bearing and opening performance of hard isolation devices.

[0015] Among them: 1-top cover, 2-standard engine, 3-left tooling, 4-isolating device, 5-right tooling, 6-insulating screw ring. Specific implementation plan

[0016] The utility model provides a tester for testing the pressure-bearing and opening performance of a hard isolation device of a pulse engine, including a fixture for fixing the isolation device, which is provided with a left fixture and a right fixture (the left and right fixtures have basically the same structure, with fine-tuning of the interface). Both the left and right fixtures have a flange on one side and a large-opening thread on the other side. The left and right fixtures are connected by the flange, and the isolation device to be tested is placed in the middle. A standard engine is connected to either the left or right side via threads (determined by pressure-bearing and opening tests). The inner circumferential walls of the left and right fixtures are provided with limiting steps that cooperate with the isolation device.

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments and drawings of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments obtained. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0018] A tester for testing the pressure-bearing opening performance of a pulse engine's rigid isolation device includes an isolation device fixture, comprising a left fixture and a right fixture (the left and right fixtures are essentially identical in structure, with minor adjustments to the interface). The left and right fixtures feature a flange on one side and a wide-opening thread on the other. The left and right fixtures are connected via the flange, with the isolation device to be tested placed in between. The threaded interface remains consistent with that of a standard engine, and the standard engine is connected via threads on either the left or right side (determined by pressure-bearing and opening tests). The inner circumferences of the left and right fixtures are equipped with stopper steps that mate with the isolation device. The inner walls of the isolation device fixtures (left and right fixtures) are also equipped with stopper steps to secure the isolation device. The isolation device fixtures (left and right fixtures) are connected via flange bolts. The other two sides of the isolation device fixtures (the side opposite the fixture flange) feature wide-opening threads, consistent with commonly used standard engine threads, facilitating assembly. The overall design of the isolation device fixtures (left and right fixtures) is compact, with simple interfaces and easy use. The sealing method of the connection between the isolation device fixing fixture (left and right fixtures) and the standard engine is the same as that of the standard engine. The entire tester fixture is made of steel.

[0019] The figure shows the test fixture for testing the pressure-bearing opening performance of a pulse engine's rigid isolation device. It consists of a left fixture, a right fixture, a standard engine, and a thermal insulation screw ring. The left and right fixtures are connected by flange bolts, and the standard engine and thermal insulation screw ring are connected using large-opening threads at both ends.

[0020] The core of this tester lies in the design of the left and right fixtures. Multiple stoppers are installed along the inner circumference, as shown in the figure, to cleverly secure the isolation device. Simultaneously, one side of the left and right fixtures is connected to a standard engine, while the other side is connected to a heat-insulating screw (not installed for cold pressure). During the pressure-bearing performance test of the isolation device, water is injected through the ignition hole in the top cover to withstand the pressure. During the opening process, a standard engine charge is used for hot opening. Ignition is the same as for a standard engine, with the ignition wire leading from the engine head.

[0021] The specific implementation flow chart is shown in the figure. During the isolation device pressure test, the isolation device is correctly installed in the middle position between the left and right tooling. After installation, the two toolings are connected and fixed with bolts (with bullet pads and flat washers). After fixing, the standard engine casing is connected to the side of the isolation device that needs to be pressurized. At the same time, the standard engine top cover is connected for water pressure pressure testing. If hot pressure is required, a standard engine with propellant (no top cover installed, nozzle installed) must be connected for ignition test. A simple ignition charge is used for ignition, and the ignition wire is extended along the nozzle. The ignition process is consistent with the standard engine. During the hot opening test of the isolation device, a standard engine with propellant (no top cover installed, nozzle installed) is borrowed and installed on the side that needs to be opened. A hot opening test is performed. A simple ignition charge is used for ignition, and the ignition wire is extended along the nozzle. The ignition process is consistent with the standard engine test process. During the cold bench test, the tester is placed on the ground for testing. During the hot test, the tester is fixed to the test thrust frame using tooling.

[0022] Compared with previous testers, the pulse engine hard isolation device pressure bearing and opening performance detection tester of the utility model has a simple structure, is lightweight, easy to install, has a simple interface, and is reusable. At the same time, it improves work efficiency and reduces costs. See Table 1 for details.

[0023] Table 1 Comparison of the schemes before and after the tester improvement

[0024]

[0025] The pressure-bearing and opening performance tester of the hard isolation device of the pulse engine of the present invention has undergone a water pressure bearing test, a water pressure opening test and a hot opening test. The isolation device withstands a pressure of 24MPa in the pressure bearing test, and the opening pressure determined by the cold opening test of the isolation device is 2.1MPa, which is basically consistent with the hot opening pressure of 2.15MPa.

[0026] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A pulse engine hard isolation device pressure opening performance tester, characterized in that: The tester comprises: a left tool (3), a right tool (5), a standard engine (2), a heat-insulating screw ring (6), a top cover (1) and an isolation device (4); the isolation device (4) is arranged between the left tool (3) and the right tool (5); the left tool (3) and the right tool (5) are connected via a flange to form an isolation device fixed tool; the standard engine (2) is arranged on the side of the isolation device that needs to bear pressure, the heat-insulating screw ring (6) is installed on the other side, and the top cover (1) is connected to the standard engine (2).

2. The pulse engine hard isolation device pressure opening performance tester according to claim 1 is characterized by: The inner peripheral walls of the large opening ends of the left tooling (3) and the right tooling (5) are provided with limiting steps that match the isolation device (4) to ensure a tight connection.

3. The pulse engine hard isolation device pressure opening performance tester according to claim 1 is characterized by: The small opening ends of the left tooling and the right tooling are provided with large opening threads, which are convenient for installing a standard engine and an insulating screw ring.

4. The pulse engine hard isolation device pressure opening performance tester according to claim 1 is characterized by: The inner circumferential walls of the left tooling and the right tooling are provided with a plurality of limiting blocks along the circumferential direction to fix the isolation device.

5. The pulse engine hard isolation device pressure opening performance tester according to claim 1 is characterized by: The tester tooling is made entirely of steel.

6. The pulse engine hard isolation device pressure-bearing opening performance tester according to claim 1 is characterized by: The sealing method of the connection part between the fixing fixture of the isolation device and the standard engine is consistent with that of the standard engine.

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