Underwater rocket hot test run test device

Abstract

The utility model discloses an underwater rocket hot test run test device, which comprises a test water tank, a baffle plate, a supporting seat and a sleeve which are fixed on a bottom plate of the test water tank, and a test assembly which is arranged at the front end of an engine to be tested, the testing assembly comprises a pressure measuring body, a connecting block, a force measuring sensor, a pressure measuring nozzle and a pressure measuring sensor; the pressure measuring body is provided with an axial air inlet blind hole and a lateral pressure measuring hole, and the pressure measuring hole of the pressure measuring body is connected with the pressure measuring sensor through the pressure measuring nozzle; the front end face of the pressure measuring body is connected with the force measuring sensor through the connecting block. A to-be-tested engine is installed in an inner cavity of the sleeve, and the rear end of a pressure measuring body of the testing assembly is fixed to the to-be-tested engine in a threaded mode, so that an air inlet blind hole in the rear end of the pressure measuring body is aligned to a pressure measuring channel in the front end of the to-be-tested engine. A pressure measuring sensor at the front end of the testing assembly is tightly attached to the right end face of the baffle. The test device provided by the utility model realizes the underwater hot test run test of the engine.

Description

Technical Field

[0001] The utility model relates to an underwater rocket hot-fire test device, belonging to the technical field of solid rocket engine tests. Background Art

[0002] In the field of projectiles and rockets, ground hot-fire tests are a main test method and an indispensable working link in the development process of solid rocket engines. According to the requirements of hot-fire tests, first, the engine is installed on the test stand, the propellant is ignited according to the preset program, the engine works and completes the specified actions according to the instructions, and at the same time, the whole process of parameter measurement is carried out. Static tests are generally carried out on land and are tests to evaluate the design rationality, structural integrity and reliability of rocket engines. However, in some projects with limited conditions, underwater tests must be carried out in the wild, and a series of problems need to be considered at this time. For example: the selection of the site, the fixation of the static test stand, and underwater measurement will directly affect the success of the test. Content of the Utility Model

[0003] The purpose of the utility model is to realize the underwater hot-fire test of rocket projectiles in the wild, and for this reason, an underwater rocket hot-fire test device is provided.

[0004] The purpose of the utility model is realized through the following technical solutions:

[0005] An underwater hot-fire test device of the utility model comprises a test water tank, a baffle vertically fixed on the left side of the bottom plate of the test water tank, a support seat fixed on the right side of the bottom plate of the test water tank, a sleeve horizontally fixed on the upper end of the support seat, and a test assembly installed at the front end of the engine to be tested;

[0006] The sleeve is a cylindrical combined structure formed by enclosing two semi-cylindrical parts, the inner diameter of the cylindrical combined sleeve matches the outer diameter of the engine to be tested, and the axis of the cylindrical combined sleeve is perpendicular to the baffle;

[0007] The test assembly includes a pressure measuring body, a connecting block, a force measuring sensor, a pressure measuring nozzle and a pressure measuring sensor;

[0008] The pressure measuring body is of a cylindrical structure, a ring-shaped connecting platform with internal threads is arranged at the rear end of the pressure measuring body, and the internal threads of the ring-shaped connecting platform match the external threads at the front end of the engine to be tested; an air inlet blind hole is axially inwardly opened at the center of the rear end face of the pressure measuring body, a pressure measuring hole communicating with the air inlet blind hole is radially inwardly opened on the side wall of the pressure measuring body, and the pressure measuring sensor is connected to the pressure measuring hole on the side wall of the pressure measuring body through the pressure measuring nozzle; the front end face of the pressure measuring body is connected to the force measuring sensor through the connecting block;

[0009] The engine to be tested is installed in the inner cavity of the sleeve cylindrical assembly. The rear end of the pressure measuring body of the test assembly is fixedly connected to the engine to be tested by a threaded connection through an annular connecting platform, so that the air intake blind hole at the rear end of the pressure measuring body is aligned with the pressure measuring channel at the front end of the engine to be tested; the pressure measuring sensor at the front end of the test assembly is closely attached to the right end face of the baffle plate.

[0010] A gasket is provided at the butt joint end face between the pressure measuring body and the engine to be tested.

[0011] The left side plate surface of the baffle plate is fixed to the bottom plate of the test water tank through a reinforcing plate.

[0012] The side wall of the pressure measuring body is provided with wrench blocks evenly distributed in the circumferential direction, which facilitates the butt joint between the pressure measuring body and the engine to be tested.

[0013] A drain valve is provided at the bottom of the test water tank.

[0014] Working process

[0015] When performing an underwater hot test, first, water is injected into the test water tank to simulate an underwater test environment; then, the engine to be tested is controlled to ignite. Under the restraint of the sleeve cylindrical assembly, the engine to be tested can only move axially forward. The engine to be tested pushes the test assembly forward to tightly press against the right end face of the baffle plate, and the pressure measuring sensor can measure the axial thrust data of the engine to be tested in real time; at the same time, the pressure measuring sensor is communicated with the inner cavity of the engine to be tested through the air intake blind hole and the pressure measuring hole of the pressure measuring body, and the pressure measuring sensor can measure the internal cavity gas pressure data of the engine to be tested in real time.

[0016] Beneficial effects:

[0017] The test device of the present utility model can place the test device on land, fill it with water to simulate an underwater environment, and the test assembly can measure the rocket pressure and thrust simultaneously. The operation process is simple and reliable. For the field underwater operation of small engines, this device can simplify the entire test process and greatly improve the feasibility and reliability of the test. Brief description of the drawings

[0018] Figure 1 Is an axonometric view of the test device of the present utility model;

[0019] Figure 2 Is a cross-sectional view of the test assembly in the test device of the present utility model;

[0020] In the figure, 1 - baffle plate, 2 - test assembly, 3 - support seat, 4 - sleeve, 5 - first screw, 6 - test water tank, 21 - force measuring sensor, 22 - second screw, 23 - connecting block, 24 - pressure measuring body, 25 - gasket, 26 - pressure measuring nozzle, 27 - pressure measuring sensor, 28 - engine to be tested. Detailed implementation manners

[0021] The content of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Embodiment

[0023] As Figure 1 shown, an underwater hot test device of the present utility model includes a test water tank 6, a baffle 1 vertically fixed on the left side of the bottom plate of the test water tank 6, a support seat 3 fixed on the right side of the bottom plate of the test water tank 6, a sleeve 4 horizontally fixed on the upper end of the support seat 3, and a test assembly 2 installed at the front end of the engine 28 to be tested;

[0024] The sleeve 4 is a cylindrical combined structure formed by enclosing two semi-cylindrical sub-pieces. The inner diameter of the cylindrical combined structure of the sleeve 4 matches the outer diameter of the engine 28 to be tested, and the axis of the cylindrical combined structure of the sleeve 4 is perpendicular to the baffle 1;

[0025] As Figure 2 shown, the test assembly 2 includes a pressure measuring body 24, a connecting block 23, a force measuring sensor 21, a pressure measuring nozzle 26, and a pressure measuring sensor 27;

[0026] The pressure measuring body 24 is of a cylindrical structure. A ring-shaped connecting platform with internal threads is provided at the rear end of the pressure measuring body 24, and the internal threads of the ring-shaped connecting platform match the external threads at the front end of the engine 28 to be tested; an air inlet blind hole is axially inwardly opened at the center of the rear end face of the pressure measuring body 24, and a pressure measuring hole communicating with the air inlet blind hole is radially inwardly opened on the side wall of the pressure measuring body 24. The pressure measuring sensor 27 is connected to the pressure measuring hole on the side wall of the pressure measuring body 24 through the pressure measuring nozzle 26; the front end face of the pressure measuring body 24 is connected to the force measuring sensor 21 through the connecting block 23;

[0027] The engine 28 to be tested is installed in the inner cavity of the cylindrical combined structure of the sleeve 4. The rear end of the pressure measuring body 24 of the test assembly 2 is threadedly fixed to the engine 28 to be tested through the ring-shaped connecting platform, so that the air inlet blind hole at the rear end of the pressure measuring body 24 is aligned with the pressure measuring channel at the front end of the engine 28 to be tested; the pressure measuring sensor 27 at the front end of the test assembly 2 is closely attached to the right end face of the baffle 1.

[0028] A sealing gasket 25 is provided at the butting end face between the pressure measuring body 24 and the engine 28 to be tested.

[0029] The left side plate surface of the baffle 1 is fixed to the bottom plate of the test water tank 6 through a reinforcing plate.

[0030] The side wall of the pressure measuring body 24 is provided with wrench blocks evenly distributed in the circumferential direction, which facilitates the butting of the pressure measuring body 24 and the engine 28 to be tested.

[0031] The bottom of the test water tank 6 is provided with a drain valve.

[0032] The sleeve 4 and the support base 3 are fixed by a first screw 5.

[0033] The front end face of the pressure measuring body 24 and the connecting block 23 are fixed by a second screw 22.

[0034] Working process

[0035] When performing an underwater hot test, first, water is injected into the test water tank 6 to simulate the underwater test environment. Then, the engine to be tested 28 is controlled to ignite. Under the restraint of the cylindrical assembly of the sleeve 4, the engine to be tested 28 can only move axially forward. The engine to be tested 28 pushes the test assembly 2 forward to tightly press against the right end face of the baffle 1. The pressure measuring sensor 27 can measure the axial thrust data of the engine to be tested 28 in real time. At the same time, the pressure measuring sensor 27 is communicated with the inner cavity of the engine to be tested 28 through the air inlet blind hole and the pressure measuring hole of the pressure measuring body 24, and the pressure measuring sensor 27 can measure the gas pressure data in the inner cavity of the engine to be tested 28 in real time.

Claims

1. An underwater rocket hot test device, characterized by: It includes a test water tank, a baffle plate vertically fixed to the left side of the bottom plate of the test water tank, a support base fixed to the right side of the bottom plate of the test water tank, a sleeve horizontally fixed to the upper end of the support base, and a test assembly installed at the front end of the engine to be tested; The sleeve is a cylindrical assembly structure formed by two semi-cylindrical sub-components, the inner diameter of the sleeve cylindrical assembly matches the outer diameter of the engine to be tested, and the axis of the sleeve cylindrical assembly is perpendicular to the baffle; The test assembly includes a pressure measuring body, a connecting block, a force sensor, a pressure measuring nozzle and a pressure sensor; The pressure measuring body is a cylindrical structure, and the rear end of the pressure measuring body is provided with an annular connecting platform with an internal thread, and the internal thread of the annular connecting platform matches the external thread of the front end of the engine to be tested; an air intake blind hole is axially opened inwardly from the center of the rear end face of the pressure measuring body, and a pressure measuring hole connected to the air intake blind hole is radially opened inwardly on the side wall of the pressure measuring body, and the pressure measuring hole on the side wall of the pressure measuring body is connected to the pressure measuring sensor through the pressure measuring nozzle; the front end face of the pressure measuring body is connected to the force measuring sensor through the connecting block; The engine to be tested is installed in the inner cavity of the sleeve cylindrical assembly, and the rear end of the pressure measuring body of the test assembly is threadedly fixed to the engine to be tested through an annular connecting platform, so that the air intake blind hole at the rear end of the pressure measuring body is aligned with the pressure measuring channel at the front end of the engine to be tested; the pressure measuring sensor at the front end of the test assembly is close to the right end face of the baffle.

2. The underwater rocket hot test device according to claim 1, characterized in that: A sealing gasket is arranged at the butt end surface between the pressure measuring body and the engine to be measured.

3. An underwater rocket hot test device as claimed in claim 1 or 2, characterized in that: The left side plate surface of the baffle is fixed to the bottom plate of the test water tank through a reinforcing plate.

4. An underwater rocket hot test device as claimed in claim 1 or 2, characterized in that: The side wall of the pressure measuring body is provided with wrench blocks evenly distributed around the circumference.

5. An underwater rocket hot test device as claimed in claim 1 or 2, characterized in that: A drain valve is provided at the bottom of the test water tank.

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