Device for rapidly detecting strength of engine jet pipe blanking cap

Abstract

The utility model relates to the technical field of solid rocket engines, in particular to a device for rapidly detecting the strength of an engine jet pipe blanking cap. The utility model provides a device for rapidly detecting the strength of an engine nozzle blanking cap, which comprises an upper end cover and a lower end cover, and the upper end cover and the lower end cover are completely buckled to form a closed cavity and are sealed and fixed through two groups of fasteners. According to the device for rapidly detecting the strength of the engine jet pipe blanking cap, the bonding process is reduced, the detection cost is reduced, the manpower is saved, the detection efficiency is improved, rapid detection of jet pipe blanking cap products is ensured, and model development nodes are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of solid rocket engines, in particular to a device for quickly detecting the strength of an engine nozzle plugging cover. Background Art

[0002] The nozzle plug is a critical component of solid rocket engines, typically installed at the nozzle convergence section. It not only seals, protects against dust and moisture, but also rapidly builds engine ignition pressure, shortens ignition delay, and ensures initial engine pressure buildup and thrust increase.

[0003] The cold-opening pressure test of nozzle plugs is a crucial step in nozzle plug product delivery. This test is typically performed by gluing the nozzle plugs to a fixture or nozzle. The test fixture must be designed to perfectly match the shape of the nozzle plug to be tested. Glue is injected into the gap to seal the nozzle plug to the test fixture, facilitating the cold-opening pressure test. After the test is complete, all glue stains on the test fixture and nozzle to be tested must be cleaned before the next nozzle plug can be tested. This method is time-consuming, labor-intensive, costly, and inefficient. Summary of the Invention

[0004] The utility model provides a device and method for quickly detecting the strength of a nozzle plugging cover for a solid rocket engine. When the nozzle plugging cover is opened, the method does not need to bond the nozzle plugging cover to a tooling or a nozzle, thereby reducing the bonding process, lowering the detection cost, saving labor costs, improving the detection efficiency, ensuring the rapid detection of the nozzle plugging cover product strength, and ensuring the model development node.

[0005] In order to achieve the above objectives, the present invention solves the above technical problems through the following technical solutions:

[0006] A rapid detection device for the strength of an engine nozzle plugging cover, the detection device consisting of an upper end cover 1 and a lower end cover 2;

[0007] The upper end cover 1 is provided with a cylindrical cavity 101;

[0008] The lower end cover 2 is provided with a "T"-shaped cavity 201;

[0009] The upper end cover 1 and the lower end cover 2 are completely buckled together to form a closed cavity, and are sealed and fixed by fasteners 3.

[0010] An air inlet 103 is provided at the top axial position of the upper end cover 1 , communicating with the cylindrical cavity 101 , for filling gas into the cylindrical cavity 101 .

[0011] A first pressure measuring hole 103 and a second pressure measuring hole 104 are symmetrically provided at the middle of the cylindrical body of the upper end cover 1 .

[0012] The first pressure measuring hole 103 and the second pressure measuring hole 104 are arranged opposite to each other.

[0013] The first pressure measuring hole 103 and the second pressure measuring hole 104 are respectively connected to two pressure sensors for nozzle plugging and opening pressure redundancy testing.

[0014] An annular groove 105 is formed on the lower end surface of the upper end cover 1 , and the diameter of the annular groove 105 is larger than the diameter of the cylindrical cavity 101 .

[0015] The sealing gasket 4 is embedded in the annular groove 105 and is used for sealing the upper end cover 1 and the lower end cover 2 .

[0016] The nozzle plugging cover to be tested is placed in the T-shaped cavity 201 provided inside the lower end cover 2 and is pressed tightly by the fastener 3 .

[0017] The lower end surface of the nozzle plugging cover to be tested is in contact with the "T"-shaped cavity 201 of the lower end cover 2, and the nozzle plugging cover to be tested is fixed in the closed cavity formed by the upper end cover 1 and the lower end cover 2, which is convenient for opening the nozzle plugging cover for testing.

[0018] A method for quickly detecting nozzle blockage using the nozzle blockage strength rapid detection device described above.

[0019] Based on the implementation of the above technical solution, the present invention can achieve the following technical effects:

[0020] 1. The utility model provides a rapid testing device for the strength of an engine nozzle plugging cover. The above-mentioned lower end cover 2 is provided with a "T"-shaped cavity 201, which is in abutment with the lower end surface of the nozzle plugging cover to be tested. The nozzle plugging cover to be tested is fixed in the closed cavity formed by the upper end cover 1 and the lower end cover 2, which facilitates the nozzle plugging cover opening test.

[0021] 2. The engine nozzle plugging cover strength rapid detection device provided by the utility model has an annular groove 105 formed on the lower end surface of the upper end cover 1, and the sealing gasket 4 is embedded in the annular groove 105 to ensure the reliable positioning of the sealing gasket 4 for sealing the upper end cover 1 and the lower end cover 2.

[0022] 3. The engine nozzle plugging cover strength rapid detection device provided by the utility model adopts two sensors to simultaneously measure the pressure-time curve of the nozzle plugging cover opening process.

[0023] 4. The engine nozzle cap strength rapid testing device provided by this utility model does not require the nozzle cap to be perfectly aligned with the test fixture and sealed with glue. Instead, the nozzle cap to be tested is simply placed into the T-shaped cavity 201, the upper and lower end caps 1 and 2 are secured with fasteners 3, and the nozzle cap is compressed. The cap is then sealed with a gasket 4 before a cold-open pressure test can be performed. This reduces the bonding process, lowers testing costs, saves manpower, improves testing efficiency, ensures rapid testing of nozzle caps, and ensures that the product is on schedule. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic structural diagram of a nozzle plugging and capping strength rapid detection device provided by the utility model;

[0026] Figure 2 This is a structural diagram of the upper end cover provided by the utility model;

[0027] Figure 3 This is a structural diagram of the lower end cover provided by the utility model;

[0028] Figure 4 It is a schematic diagram of the annular groove on the lower end surface of the upper end cover provided by the utility model.

[0029] Reference numerals

[0030] 1-upper end cover; 101-cylindrical cavity; 102-air inlet; 103-first pressure measuring hole; 104-second pressure measuring hole; 105-annular groove;

[0031] 2-lower end cover; 201-"T" shaped cavity;

[0032] 3- Fasteners;

[0033] 4-Sealing gasket. DETAILED DESCRIPTION

[0034] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0035] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0037] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0039] The following combination Figure 1-Figure 4The utility model provides a detailed introduction to the engine nozzle plugging cover strength rapid detection device:

[0040] Combine Figure 1 As shown, in an embodiment of the present utility model, a rapid detection device for the strength of an engine nozzle plugging cover is provided, and the detection device is composed of an upper end cover 1 and a lower end cover 2;

[0041] Furthermore, a gap of 2 to 5 mm is left between the lower end surface of the upper end cover 1 and the upper end surface of the lower end cover 2 to ensure that the sealing gasket 4 is tightly pressed.

[0042] Furthermore, the upper end cover 1 and the lower end cover 2 are completely buckled together to form a closed cavity, and are sealed and fixed by two sets of fasteners 3.

[0043] Furthermore, the fastener 3 is a bolt connection structure or a threaded connection structure.

[0044] Combine Figure 2 As shown, the upper end cover 1 is provided with a cylindrical cavity 101, the inner diameter of the cylindrical cavity 101 is more than 10 mm smaller than the inner diameter of the upper end face of the nozzle plugging cover to be tested, so as to ensure that the lower end face of the upper end cover 1 presses the sealing gasket 4 and the nozzle plugging cover to be tested.

[0045] Furthermore, an air inlet 103 is provided at the top axial position of the upper end cover 1 , communicating with the cylindrical cavity 101 , for filling gas into the cylindrical cavity 101 .

[0046] Furthermore, a first pressure measuring hole 103 and a second pressure measuring hole 104 are symmetrically provided at the middle position of the cylindrical body of the upper end cover 1 .

[0047] Furthermore, the first pressure measuring hole 103 and the second pressure measuring hole 104 are arranged opposite to each other.

[0048] Furthermore, the first pressure measuring hole 103 and the second pressure measuring hole 104 are respectively connected to two pressure sensors for nozzle plugging and opening pressure redundancy testing.

[0049] Combine Figure 3 As shown, the lower end cover 2 is provided with a "T"-shaped cavity 201, and the lower end surface of the nozzle plugging cover to be tested is in contact with the "horizontal line" portion of the upper end of the "T"-shaped cavity 201.

[0050] Furthermore, the nozzle plugging cover to be tested is connected to the T-shaped cavity 201, the upper end cover 1 and the lower end cover 2 are fixed by the fastener 3 and the nozzle plugging cover to be tested is pressed tightly, and sealed with the sealing gasket 4 before the cold opening pressure test can be carried out.

[0051] Combine Figure 4As shown, an annular groove 105 is provided on the lower end surface of the upper end cover 1 , and the diameter of the annular groove 105 is larger than the diameter of the cylindrical cavity 101 .

[0052] Furthermore, the sealing gasket 4 is embedded in the annular groove 105 to ensure reliable positioning of the sealing gasket 4 .

[0053] Furthermore, the sealing gasket 4 is used to seal the upper end cover 1 and the lower end cover 2.

[0054] Furthermore, the structure of the sealing gasket 4 can also be replaced by a sealing ring structure.

[0055] Furthermore, the sealing gasket 4 is a polytetrafluoroethylene gasket.

[0056] Furthermore, the nozzle plugging cover to be tested is placed in the "T"-shaped cavity 102 provided inside the lower end cover 2, and the nozzle plugging cover to be tested is pressed by the fastener 3, and the cavity formed by the upper end cover 1 and the lower end cover 1 are sealed by the sealing gasket 4 to form a completely sealed and closed cavity.

[0057] Furthermore, the lower end surface of the nozzle plugging cover to be tested is abutted against the "T"-shaped cavity 201 of the lower end cover 2, and the nozzle plugging cover to be tested is fixed in the closed cavity formed by the upper end cover 1 and the lower end cover 2, so as to facilitate the nozzle plugging cover opening test.

[0058] Example

[0059] Place the nozzle plugging cap to be tested in the lower end cover 2, contacting the T-shaped cavity 201, and place the sealing ring 4 in the annular groove 105. Then, snap the upper end cover 1 onto the lower end cover 2, secure the upper and lower end covers 1 and 2 with fasteners 3, and simultaneously tighten the nozzle plugging cap to form a completely enclosed cavity, namely, the cylindrical cavity 101 and the T-shaped cavity 201.

[0060] Gas is filled into the closed cavity formed by the upper end cover 1 and the lower end cover 2 through the air inlet 102, and the first pressure measuring hole 103 and the second pressure measuring hole 104 are connected to two pressure sensors. The pressure-time curve of the nozzle plugging and opening process is detected at the same time to realize the nozzle plugging and opening pressure redundancy test.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rapid detection device for engine nozzle plugging strength, characterized in that: The detection device consists of an upper end cover (1) and a lower end cover (2); The upper end cover (1) is provided with a cylindrical cavity (101); The lower end cover (2) is provided with a T-shaped cavity (201); The upper end cover (1) and the lower end cover (2) are completely buckled together to form a closed cavity, and are sealed and fixed by a fastener (3); The nozzle plugging cover is placed in a T-shaped cavity (201) provided inside the lower end cover (2), and the nozzle plugging cover to be tested is pressed tightly by a fastener (3).

2. The nozzle plugging strength rapid detection device according to claim 1, characterized in that: An air inlet (102) is provided at the top axial position of the upper end cover (1), communicating with the cylindrical cavity (101) and used for filling gas into the cylindrical cavity (101).

3. The nozzle plugging strength rapid detection device according to claim 2, characterized in that: A first pressure measuring hole (103) and a second pressure measuring hole (104) are symmetrically arranged at the middle position of the cylindrical body of the upper end cover (1).

4. The nozzle plugging strength rapid detection device according to claim 3, characterized in that: The first pressure measuring hole (103) and the second pressure measuring hole (104) are arranged opposite to each other.

5. The nozzle plugging strength rapid detection device according to claim 4, characterized in that: The first pressure measuring hole (103) and the second pressure measuring hole (104) are respectively connected to two pressure sensors for pressure redundancy testing of the nozzle plugging and opening.

6. The nozzle plugging strength rapid detection device according to claim 5, characterized in that: An annular groove (105) is provided on the lower end surface of the upper end cover (1), and the diameter of the annular groove (105) is larger than the diameter of the cylindrical cavity (101).

7. The nozzle plugging strength rapid detection device according to claim 6, characterized in that: The lower end surface of the nozzle plugging cover to be tested is in contact with the T-shaped cavity (201) of the lower end cover (2), and the nozzle plugging cover to be tested is fixed in the closed cavity formed by the upper end cover (1) and the lower end cover (2), so as to facilitate the nozzle plugging cover opening test.

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