Pressurizing and curing device and method for solid rocket engine cementing product

Abstract

The invention provides a solid rocket engine cementing product pressurizing and curing device and method. The device comprises a base system device, an air bag pressurizing device, a hydraulic system and a displacement monitoring device, and the base system device comprises a side wall positioning cylinder, a base, a hydraulic supporting base and a base filling ring and is used for fixing a glued product; the air bag pressurizing device comprises an air bag, a pressure sensor control system and an air bottle, and is used for circumferentially pressurizing a glued product; the hydraulic system and displacement monitoring device comprises a pressure plate, a hydraulic control system, a displacement sensor and a hydraulic rod, and is used for pressurizing a glued product in the vertical direction. According to the invention, by uniformly pressurizing the glued product in the circumferential direction, the problems of insufficient pressurizing pressure and non-uniform pressurizing pressure are solved, meanwhile, the problem of glue shortage caused by downward flowing of a glue solution due to gravity is avoided, the glue layer thickness is stable, the gluing effect is good, the requirement of uniform curing and pressurizing of engine glued products with different sizes and structures is met, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the field of bonded products for solid rocket engines, and particularly to a pressurized curing device and method for bonded products of solid rocket engines. Background Art

[0002] Solid rocket engines usually include various product parts, such as tail pipes, diffuser sections, etc. The related products are all formed by bonding metal parts and non-metal parts. Therefore, the bonding effect and quality have an important impact on the actual use performance of the products. Among them, curing pressure is an important link in determining the bonding quality. Under the action of pressure, the adhesive diffuses and penetrates, and closely contacts the materials to be bonded. In this process, if the curing pressure is too small, it has no effect; if the curing pressure is too large, the adhesive liquid is easily extruded, resulting in lack of glue, and then causing serious debonding quality problems. Therefore, the pressurizing pressure is required to be uniform and controllable.

[0003] At present, the bonding surfaces of the engine bonded products are mostly concentrated in the circumferential direction. The existing curing and pressurizing method is to pressurize and cure with a pressurizing block in the vertical direction of the product. This pressurizing method has many deficiencies. For example, the pressurizing direction only comes from the end face, and the circumferential pressurizing pressure is insufficient, which is likely to cause no contact between the adhesive and the materials to be bonded, resulting in debonding; for different curved circumferential structures, the pressures received at different positions are different, which is likely to lead to uneven distribution of the adhesive liquid and cause lack of glue; due to the action of gravity, the circumferential adhesive is easy to flow downward and gather, resulting in lack of glue in local areas; during the curing process, the adhesive gradually undergoes a chemical reaction and will produce an aggregation and expansion phenomenon, causing the adhesive liquid to precipitate in the vertical direction, resulting in slight movement of the bonded product parts. At this time, uneven glue layer thickness is likely to cause lack of glue, and the weight of the pressing block is fixed and cannot give an effective feedback. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a pressurized curing device and method for bonded products of solid rocket engines. By quantitatively controlling the pressurizing pressure, it is possible to avoid the problem of lack of glue caused by the downward flow and aggregation of the adhesive liquid due to the action of gravity. At the same time, by controlling the pressurizing pressure through the displacement change of the pressure plate, the glue layer thickness is kept stable, and the problem of uneven adhesive liquid is avoided.

[0005] The present invention provides a pressurized curing device for bonded products of solid rocket engines, including a base system device, an airbag pressurizing device, a hydraulic system and a displacement monitoring device. Among them,

[0006] The base system device includes a side wall positioning cylinder, a base, a hydraulic support base and a base filling ring, and is used to fix the bonded product;

[0007] The airbag pressurizing device includes an airbag, a pressure sensor control system and a gas cylinder, and is used to perform circumferential pressurization on the bonded product. Among them, the gas cylinder is sequentially connected to the pressure sensor control system and the airbag, and the airbag is placed around the bonded product;

[0008] The hydraulic system and displacement monitoring device include a pressure plate, a hydraulic control system, a displacement sensor, and a hydraulic rod, which are used to apply vertical pressure to the bonded product. Among them, the hydraulic control system is connected to the hydraulic rod, and applies pressure to the pressure plate through the hydraulic rod. The displacement sensor is connected to the hydraulic control system.

[0009] Furthermore, the pressure sensor control system is used to quantitatively control the airbag pressure.

[0010] Furthermore, the pressure plate is placed on the end face of the bonded product and is used to apply uniform vertical pressure to the bonded product.

[0011] Furthermore, the displacement sensor is connected to the pressure plate. During the curing process, the reaction and expansion of the adhesive will cause the bonded product to have a vertical offset, resulting in the precipitation of adhesive in some areas and causing the displacement of the pressure plate. The displacement sensor is used to monitor the displacement of the pressure plate during the curing process of the bonded product and feedback the displacement to the hydraulic control system.

[0012] Furthermore, the hydraulic control system is used to quantitatively adjust the pressure applied by the hydraulic rod to the pressure plate, and can keep the thickness of the adhesive layer stable during the curing process.

[0013] Furthermore, the side wall positioning cylinder is used to position and fix the bonded product, and the maximum size of the bonded product that can be fixed is 80% of the inner diameter of the side wall positioning cylinder.

[0014] Furthermore, there are multiple circumferential grooves on the base, which are used to assemble and fix the side wall positioning cylinders with different diameters.

[0015] Furthermore, the base filling ring is a ring corresponding to the circumferential grooves on the base, which is used to fill the grooves and place bonded products with different sizes on the base.

[0016] Furthermore, the bonded product includes bonded products with cylindrical, conical, curved surface, and square structural features on the outer surface.

[0017] The present invention also provides a method for pressurizing and curing a bonded product of a solid rocket engine, which specifically includes the following steps:

[0018] S1. Place the bonded product on the base, select the side wall positioning cylinder according to the size of the bonded product, fill the base groove with the base filling ring, then connect the airbag, the pressure sensor control system, and the gas cylinder, and connect the hydraulic control system, the displacement sensor, and the hydraulic rod;

[0019] Place the bonded product on the base, overlap the side wall positioning cylinders, place the airbag around the bonded product, and then place the pressure plate on the end face of the bonded product;

[0020] Then lap the hydraulic support base with the side wall positioning cylinder, place the hydraulic rod of the hydraulic control system on the hydraulic support base, and connect the displacement sensor to the pressure plate;

[0021] S2. Unscrew the gas cylinder to inflate the airbag, and then input the required pressurization pressure value into the pressure sensor control system until the airbag reaches the required pressure value;

[0022] S3. Input the required pressure value in the vertical direction of the bonded product into the hydraulic control system.

[0023] Compared with the prior art, the beneficial effects obtained by the present invention are as follows:

[0024] (1) A pressurization and curing device and method for a bonded product of a solid rocket engine provided by the present invention realizes circumferential uniform pressurization of the engine bonded product, solves the problems of insufficient circumferential pressurization pressure and uneven pressure, and at the same time avoids the problem of lack of glue caused by the downward flow of glue due to gravity;

[0025] (2) A pressurization and curing device and method for a bonded product of a solid rocket engine provided by the present invention quantitatively controls the airbag pressure for the engine bonded product, meets the curing pressurization needs of different bonded products, and has good applicability;

[0026] (3) A pressurization and curing device and method for a bonded product of a solid rocket engine provided by the present invention controls the applied pressure in the vertical direction by monitoring the displacement change of the pressure plate during the curing process of the bonded product, keeps the glue layer thickness stable, and can ensure good bonding effect;

[0027] (4) A pressurization and curing device and method for a bonded product of a solid rocket engine provided by the present invention can meet the needs of uniform curing pressurization of engine bonded products with different sizes and structures, and has a wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions disclosed in the present invention, the following will briefly introduce the drawings required to be used in some embodiments disclosed in the present invention. Obviously, the following described drawings are only the drawings of some embodiments disclosed in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual sizes of the products, the actual processes of the methods, etc. involved in the embodiments disclosed in the present invention.

[0029] Figure 1 It is a schematic cross-sectional view of a pressurization and curing device for a bonded product of a solid rocket engine provided by the present invention.

[0030] Figure 2Schematic diagram of the tail pipe and diffuser section structures of the bonded product of a solid rocket motor.

[0031] Figure 3 Partial detail drawing of the base system device of a pressure curing device for a bonded product of a solid rocket motor provided by the present invention.

[0032] Figure 4 Partial detail drawing of the airbag pressure device of a pressure curing device for a bonded product of a solid rocket motor provided by the present invention.

[0033] Figure 5 Partial detail drawing of the hydraulic system and displacement monitoring device of a pressure curing device for a bonded product of a solid rocket motor provided by the present invention.

[0034] Reference numerals are: 1, base system device; 2, airbag pressure device; 3, hydraulic system and displacement monitoring device; 11, sidewall positioning cylinder; 12, base; 13, hydraulic support base; 14, base filling ring; 21, airbag; 22, pressure sensor control system; 23, gas cylinder; 31, pressure plate; 32, hydraulic control system; 33, displacement sensor; 34, hydraulic rod. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below.

[0036] The present invention provides a pressure curing device for a bonded product of a solid rocket motor, as Figure 1 shown. The curing device includes a base system device 1, an airbag pressure device 2, and a hydraulic system and displacement monitoring device 3. The bonding surface of the bonded product is a combination of a cylindrical curved surface and a conical curved surface.

[0037] As Figure 3 shown, the base system device 1 includes a sidewall positioning cylinder 11, a base 12, a hydraulic support base 13, and a base filling ring 14, and is used to fix the bonded product;

[0038] As Figure 4 shown, the airbag pressure device 2 includes an airbag 21, a pressure sensor control system 22, and a gas cylinder 23, and is used to perform circumferential pressure on the bonded product. Among them, the gas cylinder 23 is sequentially connected to the pressure sensor control system 22 and the airbag 21, and the airbag 21 is placed around the bonded product;

[0039] AsFigure 5 As shown, the hydraulic system and displacement monitoring device 3 includes a pressure plate 31, a hydraulic control system 32, a displacement sensor 33 and a hydraulic rod 34, which is used to apply vertical pressure to the bonded product. Among them, the hydraulic control system 32 is connected to the hydraulic rod 34 to apply pressure to the pressure plate 31 through the hydraulic rod 34, and the displacement sensor 33 is connected to the hydraulic control system 32.

[0040] The pressure sensor control system 22 is used to quantitatively control the pressure of the airbag 21.

[0041] The pressure plate 31 is placed on the end face of the bonded product to apply uniform vertical pressure to the bonded product.

[0042] The displacement sensor 33 is connected to the pressure plate 31 to monitor the displacement of the pressure plate 31 during the curing process of the bonded product and feedback the displacement to the hydraulic control system 32.

[0043] The hydraulic control system 32 is used to quantitatively adjust the pressure applied by the hydraulic rod 34 to the pressure plate 31, so as to keep the adhesive layer thickness stable during the curing process.

[0044] The side wall positioning cylinder 11 is used to position and fix the bonded product. The maximum size of the bonded product that can be fixed is 80% of the inner diameter of the side wall positioning cylinder 11. The bonded product includes bonded products with cylindrical, conical, curved surface and square structural features on the outer surface.

[0045] There are multiple circumferential grooves on the base 12 for assembling and fixing the side wall positioning cylinders 11 with different diameters.

[0046] The base filling ring 14 is a ring corresponding to the circumferential grooves on the base 11, which is used to fill the grooves and place bonded products with different sizes on the base 11.

[0047] A method for pressurizing and curing a bonded product of a solid rocket motor includes the following steps:

[0048] S1. Place the bonded product on the base 12, select the side wall positioning cylinder 11 according to the size of the bonded product, use the base filling ring 14 to fill the grooves on the base 12, then connect the airbag 21, the pressure sensor control system 22 and the gas cylinder 23, and connect the hydraulic control system 32, the displacement sensor 33 and the hydraulic rod 34;

[0049] Place the bonded product on the base 12, overlap the side wall positioning cylinders 11, place the airbag 21 around the bonded product, and then place the pressure plate 31 on the end face of the bonded product;

[0050] Then, lap the hydraulic support base 13 with the side wall positioning cylinder 11, place the hydraulic rod 34 of the hydraulic control system 32 on the hydraulic support base 14, and connect the displacement sensor 33 to the pressure plate 31;

[0051] S2. Unscrew the gas cylinder 23 to inflate the airbag 21, and then input the required pressurization pressure value into the pressure sensor control system 22 until the airbag reaches the required pressure value;

[0052] S3. Input the required pressure value in the vertical direction of the bonded product into the hydraulic control system 32.

[0053] By uniformly pressurizing the circumferential direction of the bonded product, the present invention solves the problems of insufficient pressurization pressure and uneven pressure, and at the same time avoids the problem of lack of adhesive caused by the downward flow of the adhesive due to gravity. The adhesive layer thickness is stable, the bonding effect is good, and the demand for uniform curing and pressurization of engine bonded products with different sizes and structures is met, and the applicable range is wide.

[0054] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A pressurized curing device for adhesive bonding products of solid rocket engines, characterized in that: The curing device comprises a base system device (1), an airbag pressurizing device (2), a hydraulic system and a displacement monitoring device (3), The base system device (1) comprises a side wall positioning cylinder (11), a base (12), a hydraulic support base (13) and a base filling ring (14), which are used to fix the adhesive bonding product; The airbag pressurizing device (2) comprises an airbag (21), a pressure sensor control system (22) and a gas cylinder (23), and is used to pressurize the adhesive product in a circumferential direction. The gas cylinder (23) is connected to the pressure sensor control system (22) and the airbag (21) in sequence. The airbag (21) is placed around the adhesive product. The hydraulic system and displacement monitoring device (3) comprises a pressure plate (31), a hydraulic control system (32), a displacement sensor (33) and a hydraulic rod (34), and is used to apply vertical pressure to the adhesively bonded product. The hydraulic control system (32) is connected to the hydraulic rod (34), and pressure is applied to the pressure plate (31) via the hydraulic rod (34). The displacement sensor (33) is connected to the hydraulic control system (32).

2. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1 is characterized in that: The pressure sensor control system (22) is used to quantitatively control the pressure of the airbag (21).

3. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1 is characterized in that: The pressure plate (31) is placed on the end surface of the glued product and is used to uniformly pressurize the glued product in the vertical direction.

4. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1 is characterized in that: The displacement sensor (33) is connected to the pressure plate (31) and is used to monitor the displacement of the pressure plate (31) during the curing process of the adhesive product and to feed back the displacement to the hydraulic control system (32).

5. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1 is characterized in that: The hydraulic control system (32) is used to quantitatively adjust the pressure applied by the hydraulic rod (34) to the pressure plate (31), so that the thickness of the adhesive layer can be kept stable during the curing process.

6. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1, characterized in that: The side wall positioning tube (11) is used to position and fix the adhesive bonding product, and the maximum size of the adhesive bonding product that can be fixed is 80% of the inner diameter of the side wall positioning tube (11).

7. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1 is characterized in that: The base (12) is provided with a plurality of circumferential grooves for assembling and fixing the side wall positioning cylinders (11) of different diameters.

8. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1, characterized in that: The base filling ring (14) is a circular ring corresponding to the circumferential groove on the base (11) and is used to fill the groove and place adhesive products of different sizes on the base (11).

9. The pressurized curing device for adhesive bonding products of solid rocket motors according to claim 1, characterized in that: The adhesive bonding product is any adhesive bonding product whose outer surface has cylindrical, conical, curved or square structural characteristics.

10. A pressurized curing method for a solid rocket engine adhesive product, characterized in that: The pressurized curing method comprises the following steps: S1, placing the adhesive product on the base (12), selecting the side wall positioning tube (11) according to the size of the adhesive product, using the base filling ring (14) to fill the groove of the base (12), and then connecting the air bag (21), the pressure sensor control system (22) and the gas cylinder (23), and connecting the hydraulic control system (32), the displacement sensor (33) and the hydraulic rod (34); The glued product is placed on the base (12), the side wall positioning tubes (11) are overlapped, the air bag (21) is placed around the glued product, and then a pressure plate (31) is placed on the end surface of the glued product; Then, the hydraulic support base (13) is overlapped with the side wall positioning cylinder (11), the hydraulic rod (34) of the hydraulic control system (32) is placed on the hydraulic support base (14), and the displacement sensor (33) is connected to the pressure plate (31); S2, unscrewing the gas cylinder (23) to inflate the airbag (21), and then inputting the required pressurization pressure value into the pressure sensor control system (22) until the airbag reaches the required pressure value; S3. Input the pressure value required for the glued product in the vertical direction into the hydraulic control system (32).

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