Fixture for positioning sealing insertion tube of solid rocket engine to directly face screw hole

Abstract

The utility model discloses a positioning tool for a sealing insertion pipe of a solid rocket engine directly facing a screw hole. The positioning tool comprises a guide mechanism, a screw hole positioning mechanism and a fixing mechanism. The guide mechanism comprises an intubation tube guide strip and a screw hole guide strip which are perpendicular to each other, a first slot is formed in the center of the intubation tube guide strip, and a second slot is formed in the center of the screw hole guide strip; the lower side of the screw hole positioning mechanism is provided with a fixing block which can be inserted into the second slot, and the upper side is provided with a threaded hole and a corresponding bolt which is consistent with an engine end face screw hole; the screw hole guide strip of the guide mechanism is perpendicular to the enclosure opening of the shell, the pipe insertion guide strip penetrates into the shell to be attached to the enclosure opening of the shell and is fixed through cooperation of the fixing mechanism and the fixing block of the screw hole positioning mechanism, and the position of the pipe insertion guide strip serves as the pipe insertion position. The device can ensure that the position of the sealing insertion pipe meets the process requirement, is simple in positioning, high in precision and reusable, has certain model universality, and improves the efficiency of an engine.

Description

Technical Field

[0001] This utility model relates to the field of solid rocket engine insulation layer forming technology, and in particular to a solid rocket engine sealing tube positioning tool aligned with the screw hole. Background Technology

[0002] The main function of the artificial debonding layer in an engine is to effectively release the contraction force of the propellant grain, ensure the integrity of the propellant grain structure, and prevent debonding between the coating layer and the propellant grain interface due to propellant grain contraction. To prevent the lining or propellant slurry from flowing into the gaps between the artificial debonding layer and the insulation layer during lining molding or propellant loading, the space formed between the artificial debonding layer and the insulation layer is adhered and positioned, and the artificial debonding layer is sealed before loading. After the artificial debonding layer at the engine head and tail is sealed, gas accumulates between the artificial debonding layer and the bottom insulation layer. Before loading, the gaps in the artificial debonding layer need to be evacuated to remove gas, which facilitates the adhesion of the artificial debonding layer. Therefore, when sealing the engine head and tail, an exhaust pipe needs to be pre-installed on the sealing material, and the pre-installed position of the exhaust pipe must correspond to the position of the exhaust pipe on the loading fixture. In order to accurately position the tail artificial debonding layer sealing tube, it is urgent to design an accurate tail tube positioning fixture. Utility Model Content

[0003] The technical problem solved by this utility model is to overcome the inaccuracy of manual debonding layer sealing tube positioning and to provide a solid rocket engine sealing tube positioning fixture aligned with the screw hole, thus solving the technical problem of inaccurate sealing tube positioning and the easy generation of large errors.

[0004] The technical solution of this utility model is: a solid rocket engine sealing tube positioning fixture for positioning screw holes, including: a guiding mechanism, a screw hole positioning mechanism and a fixing mechanism;

[0005] The guiding mechanism includes a cannula guide bar and a screw hole guide bar that are perpendicular to each other. The cannula guide bar has a first groove at its center and the screw hole guide bar has a second groove at its center.

[0006] The screw hole positioning mechanism has a fixing block on the lower side that can be inserted into the second slot, and a threaded hole and a corresponding first bolt on the upper side. The first bolt is consistent with the screw hole on the engine end face.

[0007] The guide strip of the guide mechanism is perpendicular to the housing opening, and the insertion guide strip is inserted into the housing and fits against the housing opening. It is fixed by the fixing block of the fixing mechanism and the screw hole positioning mechanism, and the position of the insertion guide strip is used as the insertion position.

[0008] Furthermore, the first slot is closed at one end and the other end is through which the insertion guide strip passes, while the second slot is a slot closed at both ends.

[0009] Furthermore, the fixing mechanism includes a fixing ring and a second bolt, and a threaded hole matching the second bolt is provided at the center of the fixing block.

[0010] Furthermore, the fixing block of the screw hole positioning mechanism is a cube, which fits with the second slot clearance.

[0011] Furthermore, the guiding mechanism is provided with a tube guide bar with a length of 50 mm to 200 mm and a width of 8 mm to 12 mm, and a first slot with a width of 6 mm to 8 mm at the center of the guide bar; the guiding mechanism is provided with a screw hole guide bar with a length of 60 mm to 220 mm and a width of 8 mm to 12 mm, and a second slot with a width of 5 mm to 8 mm at the center of the guide bar.

[0012] Furthermore, the fixing block of the screw hole positioning mechanism is a cube with a side length of 5.8mm~7.8mm.

[0013] Furthermore, the fixing mechanism includes a fixing ring and a second bolt with a diameter of Ф3mm to Ф6mm, and the threaded hole at the center of the fixing block has a diameter of Ф3mm to Ф6mm.

[0014] Furthermore, the screw hole positioning mechanism has threaded holes of Ф4mm~Ф12mm and corresponding first bolts.

[0015] Furthermore, the connection between the guide mechanism and the screw hole positioning mechanism is smoothly transitioned.

[0016] The advantages of this utility model compared with the prior art are as follows:

[0017] (1) The positioning fixture of this utility model can solve the problem of inaccurate tail sealing tube position, ensure that the tube position meets the process requirements, and has simple positioning, high precision, and improve engine efficiency;

[0018] (2) This utility model uses a cannula groove for positioning, which further improves the positioning accuracy;

[0019] (3) By using the fixed plate and positioning plate in conjunction with the screw holes on the end face of the enclosure, this utility model can effectively reduce the positioning complexity and greatly save labor costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a positioning fixture for aligning the sealing tube of a solid rocket engine with the screw hole according to the present invention.

[0021] Figure 2 This is a schematic diagram of the guiding mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the screw hole positioning mechanism of this utility model.

[0023] Figure 4This is a schematic diagram of the fixing mechanism of the utility model;

[0024] Figure 5 This is a schematic diagram of the positioning tooling of this utility model.

[0025] In the diagram: 1-Guiding mechanism; 101-Insertion guide strip; 102-Screw hole guide strip; 2-Screw hole positioning mechanism; 201-Ф10mm threaded hole; 202-Ф10mm first bolt; 203-Fixing block; 3-Fixing mechanism; 301-Fixing ring; 302-Ф4mm second bolt; 4-Engine housing; 5-Screw hole; 6-Insulation layer; 7-Artificial debonding layer seam; 8-Artificial debonding layer; 9-PU tube. Detailed Implementation

[0026] To better understand the technical solution of this utility model, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Any references to direction and orientation in the description of the embodiments herein are for ease of description only and should not be construed as limiting the scope of protection of this utility model. The following description of preferred embodiments involves combinations of features, which may exist independently or in combination; this utility model is not particularly limited to the preferred embodiments.

[0027] This utility model provides a technical solution: such as Figure 1 The solid rocket engine sealing tube is positioned directly opposite the screw hole positioning fixture, which includes a guide mechanism 1, a screw hole positioning mechanism 2, and a fixing mechanism 3.

[0028] The upper surface of the guide mechanism 1 is provided with a tube guide strip 101 that is 80mm long and 12mm wide, and the center of the guide strip has a single slot 8mm wide; the lower surface of the guide mechanism is provided with a screw hole guide strip 102 that is 100mm long and 12mm wide, and the center of the guide strip has a slot 8mm wide, such as... Figure 2 ;

[0029] The screw hole positioning mechanism 2 has a Ф10mm threaded hole 201 and a corresponding first bolt 202, and below it is a 7.8mm square fixing block 203. The fixing block has a Ф4mm threaded hole at its center. Figure 3 ;

[0030] The fixing mechanism mainly consists of a fixing ring 301 and a second bolt 302 with a diameter of Ф4mm, such as Figure 4 ;

[0031] like Figure 5At the insertion position on the front (rear) end face of the solid rocket motor, a bolt fixing screw hole positioning mechanism 2 is used, which is consistent with the screw hole 5 on the end face of the front (rear) casing 4 of the motor. The screw hole guide strip 102 of the guide mechanism 1 is perpendicular to the casing opening, and the insertion guide strip 101 is inserted into the casing and fits against the casing opening. The guide mechanism is fixed using the fixing ring 301 of the fixing mechanism 3 and the second bolt 302 of Ф4mm. At this time, the position of the insertion guide strip 101 is the insertion position. The Ф6 (or Ф8) PU tube 9 is inserted into the gap 7 of the artificial debonding layer between the insulation layer 6 and the artificial debonding layer 8 for the next sealing operation.

[0032] By using a solid rocket motor sealing tube positioning fixture aligned with the screw hole and in conjunction with the solid rocket motor casing, the tube insertion position can be quickly positioned during the sealing process of solid rocket motor casings of different diameters and lengths when the process requires the tube insertion position to be aligned with the screw hole. This greatly simplifies the manual operation difficulty during the tube insertion process and improves work efficiency.

[0033] It is understood that this utility model has been described through embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific circumstances without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

[0034] The contents not described in detail in this utility model specification are common knowledge to those skilled in the art.

Claims

1. A positioning fixture for aligning a sealing tube of a solid rocket motor with a screw hole, characterized in that, include: The guiding mechanism (1), the screw hole positioning mechanism (2), and the fixing mechanism (3) are included. The guiding mechanism (1) includes a cannula guide bar (101) and a screw hole guide bar (102) that are perpendicular to each other. The cannula guide bar has a first slot at the center position and the screw hole guide bar has a second slot at the center position. The screw hole positioning mechanism (2) has a fixing block that can be inserted into the second slot on the lower side, and a threaded hole (201) and a corresponding first bolt (202) on the upper side. The first bolt (202) is consistent with the screw hole on the engine end face. The screw hole guide strip (102) of the guide mechanism (1) is perpendicular to the shell opening, and the insertion tube guide strip (101) is inserted into the shell and fits against the shell opening. It is fixed by the fixing mechanism (3) and the fixing block of the screw hole positioning mechanism (2), and the position of the insertion tube guide strip (101) is used as the insertion position.

2. The solid rocket motor sealing tube positioning fixture according to claim 1, characterized in that: The first slot is closed at one end and the other end is through which the insertion guide strip passes. The second slot is a slot that is closed at both ends.

3. The solid rocket motor sealing tube positioning fixture according to claim 1, characterized in that: The fixing mechanism (3) includes a fixing ring (301) and a second bolt (302), and a threaded hole matching the second bolt (302) is provided at the center of the fixing block.

4. The solid rocket motor sealing tube positioning fixture according to claim 1, characterized in that: The fixing block of the screw hole positioning mechanism (2) is a cube, which is fitted with the second slot clearance.

5. The solid rocket motor sealing tube positioning fixture according to claim 1, characterized in that: The guide mechanism (1) is provided with a tube guide bar (101) with a length of 50 mm to 200 mm and a width of 8 mm to 12 mm, and a first slot with a width of 6 mm to 8 mm at the center of the guide bar; the guide mechanism is provided with a screw hole guide bar (102) with a length of 60 mm to 220 mm and a width of 8 mm to 12 mm, and a second slot with a width of 5 mm to 8 mm at the center of the guide bar.

6. The solid rocket motor sealing tube positioning fixture according to claim 5, characterized in that: The fixing block of the screw hole positioning mechanism (2) is a cube with a side length of 5.8mm~7.8mm.

7. The solid rocket motor sealing tube positioning fixture according to claim 5, characterized in that: The fixing mechanism (3) includes a fixing ring (301) and a second bolt (302) with a diameter of Ф3mm~Ф6mm. The threaded hole at the center of the fixing block (203) has a diameter of Ф3mm~Ф6mm.

8. The solid rocket motor sealing tube positioning fixture according to claim 5, characterized in that: The screw hole positioning mechanism (2) has a threaded hole (201) with a diameter of Ф4mm~Ф12mm and a corresponding first bolt (202).

9. The solid rocket motor sealing tube positioning fixture according to claim 1, characterized in that: The connection between the guide mechanism (1) and the screw hole positioning mechanism (2) is smoothly transitioned.

Images