阅读说明：本技术 一种固体火箭发动机自由装填药柱压药结构及使用方法 (Free-packed grain explosive pressing structure of solid rocket engine and use method ) 是由 刘冬梅 王�锋 马东亚 张文雨 赵倩倩 吴建伟 冯易周 周志勇 李阳阳 贾致 于 2021-06-22 设计创作，主要内容包括：本发明提出一种固体火箭发动机自由装填药柱压药结构及使用方法,解决了现有技术中弹簧在发动机工作过程中脱落而引起内弹道异常的问题。一种固体火箭发动机自由装填药柱压药结构,包括燃烧室,燃烧室内从左到右依次设有堵盖、导管、药柱压紧圈和自由装填药柱,导管内设有压药弹簧,导管一端与堵盖螺纹连接,另一端与药柱压紧圈滑动连接。使用本发明的固体火箭发动机自由装填药柱压药结构,压药弹簧能通过药柱压紧圈压紧自由装填药柱；且药柱压紧圈的压药面面积足够大,不会对自由装填药柱产生损伤。由于压药弹簧被固定在压药弹簧导管内,在发动机工作过程中并不会被燃气带出发动机而引起发动机内弹道异常。(The invention provides a free charge and explosive pressing structure of a solid rocket engine and a using method thereof, which solve the problem of internal ballistic abnormality caused by falling off of a spring in the working process of the engine in the prior art. The utility model provides a solid rocket engine freely loads grain and presses medicine structure, includes the combustion chamber, from left to right is equipped with blanking cover, pipe, grain clamp collar in proper order and freely loads the grain in the combustion chamber, is equipped with the pressure medicine spring in the pipe, pipe one end and blanking cover threaded connection, the other end and grain clamp collar sliding connection. By using the free-filling grain pressing structure of the solid rocket engine, the pressing spring can tightly press the free-filling grain through the grain pressing ring; and the area of the powder pressing surface of the powder column pressing ring is large enough, so that the freely filled powder column is not damaged. Because the explosive pressing spring is fixed in the explosive pressing spring guide pipe, the explosive pressing spring is not taken out of the engine by gas in the working process of the engine to cause ballistic abnormality in the engine.)

1. The utility model provides a solid rocket engine freely loads grain and presses medicine structure which characterized in that: including combustion chamber (5), from left to right be equipped with blanking cover (4), pipe (1), powder column clamp ring (3) and freely load powder column (7) in combustion chamber (5) in proper order, be equipped with in pipe (1) and press powder spring (2), pipe (1) one end and blanking cover (4) threaded connection, the other end and powder column clamp ring (3) sliding connection.

2. The free-loading charge pressing structure of a solid rocket engine according to claim 1, wherein: the right-hand member of pipe (1) is equipped with the external screw thread, and the left end of powder column clamp ring (3) is equipped with the internal thread with external screw thread complex, and the inner wall of powder column clamp ring (3) on internal thread right side is the smooth surface.

3. The free-loading charge pressing structure of a solid rocket engine according to claim 1, wherein: the lateral wall of pipe (1) is equipped with a plurality of first air vents, and first air vent communicates with each other with the inner chamber of blanking cover (4), and the right-hand member face and the lateral wall of powder column clamping ring (3) all are equipped with a plurality of second air vents, and powder column clamping ring (3) surface is equipped with and is used for compressing tightly the pressure powder face (8) of freely filling powder column (7).

4. The free-loading charge pressing structure of a solid rocket engine according to claim 3, wherein: the thickness of the powder pressing surface (8) is 2-4 mm, and a plurality of through holes are formed in the powder pressing surface (8).

5. The free-loading charge pressing structure of a solid rocket engine according to claim 1, wherein: and a buffer pad (6) is arranged between the grain pressing ring (3) and the freely-filled grain (7).

6. The free-loading charge pressing structure of a solid rocket engine according to claim 1, wherein: the blocking cover (4) is in threaded connection with the combustion chamber (5).

7. The free-loading charge pressing structure of a solid rocket engine according to claim 1, wherein: the material of the pressing spring (2) is 65 Mn.

8. Use of the free-loading charge-pressing structure of the solid rocket engine as recited in any one of claims 1 to 7, wherein:

s1), placing the drug pressing spring (2) in the catheter (1), pressing the drug pressing spring (2) by using the drug column pressing ring (3), installing the drug column pressing ring (3) on the catheter (1), and enabling the drug column pressing ring (3) to freely move outside the catheter (1);

s2) the guide pipe (1) is screwed into the central thread of the blocking cover (4), and finally the blocking cover (4) is fixed with the front end of the engine combustion chamber (5) which is filled with the freely-filled grain (7).

9. Use according to claim 8, characterized in that: in the step 1, the internal thread of the explosive column pressing ring (3) is screwed into the external thread of the guide pipe (1), the explosive column pressing ring (3) is continuously rotated to enable the internal thread to be disengaged from the external thread, the smooth surface of the explosive column pressing ring (3) corresponds to the external thread, and the explosive column pressing ring (3) is sleeved outside the guide pipe (1) and can freely move.

Technical Field

The invention relates to the technical field of solid rocket engine charging, in particular to a free charge grain pressing structure of a solid rocket engine and a using method thereof.

Background

In a solid rocket engine with freely filled grain, the grain is in a free state in the engine. Therefore, the explosive column must be fixed at the front end and the rear end of the explosive column, and the length change of the explosive column under high and low temperatures is considered, so that a rigid explosive blocking structure is generally fixed at the rear end, and an elastic supporting structure is mostly adopted at the front end to adapt to the thermal expansion stress of the explosive column under high and low temperatures. The elastic element of the front end elastic supporting structure mostly adopts a spring, but the spring is easy to break and fall off in the working process of the engine, and the falling off process can cause the abnormality of the ballistic curve in the engine and cause the eccentricity of thrust.

Disclosure of Invention

The invention provides a free charge and explosive pressing structure of a solid rocket engine and a using method thereof, which solve the problem of internal ballistic abnormality caused by falling off of a spring in the working process of the engine in the prior art.

The technical scheme of the invention is realized as follows:

the utility model provides a solid rocket engine freely loads grain and presses medicine structure, includes the combustion chamber, from left to right is equipped with blanking cover, pipe, grain clamp collar in proper order and freely loads the grain in the combustion chamber, is equipped with the pressure medicine spring in the pipe, pipe one end and blanking cover threaded connection, the other end and grain clamp collar sliding connection.

Further, the right-hand member of pipe is equipped with the external screw thread, and the left end of powder column clamp ring is equipped with the internal thread with external screw thread fit, and the inner wall of powder column clamp ring on internal thread right side is the smooth surface.

Furthermore, the side wall of the guide pipe is provided with a plurality of first vent holes, the first vent holes are communicated with the inner cavity of the blocking cover, the right end face and the side wall of the explosive column pressing ring are provided with a plurality of second vent holes, and the outer surface of the explosive column pressing ring is provided with a powder pressing surface used for pressing freely filled explosive columns.

Further, the thickness of the medicine pressing surface is 2-4 mm, and a plurality of through holes are formed in the medicine pressing surface.

Furthermore, a cushion pad is arranged between the grain pressing ring and the freely filled grain.

Further, the plug cover is in threaded connection with the combustion chamber.

Further, the material of the pressing spring is 65 Mn.

A use method of a free-filling grain explosive-pressing structure of a solid rocket engine comprises the following steps:

s1) placing the pressing spring in the catheter, pressing the pressing spring by using a medicine column pressing ring, and installing the medicine column pressing ring on the catheter to enable the medicine column pressing ring to freely move outside the catheter;

s2) screwing the guide tube onto the central thread of the cap, and finally fixing the cap to the front end of the combustion chamber of the engine which is filled with the freely filled charge.

Further, on the external screw thread with the internal thread screw in pipe of medicine post clamping ring in step 1, continue rotatory medicine post clamping ring and make the internal thread release from the external screw thread, make the smooth surface and the external screw thread department of medicine post clamping ring corresponding, medicine post clamping ring cover can freely remove outside the pipe.

The beneficial effect that this technical scheme can produce: by using the free-filling grain pressing structure of the solid rocket engine, the pressing spring can tightly press the free-filling grain through the grain pressing ring; and the area of the powder pressing surface of the powder column pressing ring is large enough, so that the freely filled powder column is not damaged. Because the charge pressing spring is fixed in the guide pipe, the charge pressing spring is not carried out of the engine by gas in the working process of the engine to cause ballistic abnormality in the engine. The invention has simple structure, the spring is not easy to fall off in the working process of the engine, and the assembly and the disassembly are convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic plan view of the present invention;

FIG. 2 is a perspective view of a catheter;

fig. 3 is a schematic perspective view of a grain clamp ring.

In the figure: pipe 1, pressure medicine spring 2, powder column clamping ring 3, blanking cover 4, combustion chamber 5, blotter 6 freely loads powder column 7, presses the powder face 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

The left and right in the present invention are relative to the position shown in fig. 1.

Example 1

As shown in fig. 1-3, this embodiment provides a solid rocket engine freely loads grain and presses medicine structure, including combustion chamber 5, be equipped with blanking cover 4, pipe 1, grain clamp ring 3 and freely load grain 7 from left to right in proper order in the combustion chamber 5, be equipped with in the pipe 1 and press medicine spring 2, pipe 1 one end and 4 threaded connection of blanking cover, the other end and 3 sliding connection of grain clamp ring.

The use process of the invention is as follows:

the drug pressing spring 2 is placed in the catheter 1, the drug column pressing ring 3 is used for pressing the drug pressing spring 2, and the drug column pressing ring 3 is screwed into the catheter 1 until the drug column pressing ring 3 is sleeved outside the catheter 1 and moves freely. The catheter 1 is then screwed onto the central thread of the cap 4. Finally, the plug cover 4 is fixed with the front end of the engine combustion chamber 5 which is filled with the freely filled grain 7.

Example 2

The right-hand member of pipe 1 is equipped with the external screw thread, and the left end of powder column clamp ring 3 is equipped with the internal thread with external screw thread fit, and the inner wall of powder column clamp ring 3 on internal thread right side is the smooth surface.

After the medicine column pressing ring 3 is screwed into the external thread of the guide pipe 1, the medicine column pressing ring can be sleeved on the guide pipe 1 to move freely, and meanwhile, the medicine column pressing ring cannot fall off due to the resisting effect of the thread. This has also guaranteed that the powder column clamp ring 3 is along with pressing the deformation of medicine spring 2 and powder column and freely removes and have the requirement of certain pretightning force.

Other structures of this embodiment are the same as those of embodiment 1.

Example 3

The lateral wall of pipe 1 is equipped with a plurality of first air vents, and first air vent communicates with each other with the inner chamber of blanking cover 4, and the right-hand member face and the lateral wall of powder column clamp ring 3 all are equipped with a plurality of second air vents, and 3 surfaces of powder column clamp ring are equipped with the face 8 of pressing medicine that is used for compressing tightly freely filling powder column 7 specially. The first vent hole is communicated with the second vent hole, and the second vent hole is communicated with the freely filled grain 7.

The first vent hole and the second vent hole are provided mainly for facilitating the gas circulation.

Other structures of this embodiment are the same as those of embodiment 1.

Example 4

The thickness of the powder pressing surface 8 is 2-4 mm, and a plurality of through holes are formed in the powder pressing surface 8.

The thickness of the medicine pressing surface 8 is 2-4 mm, the medicine pressing surface is too thin, the strength is not enough, ablation resistance cannot be realized, and the quality is increased when the medicine pressing surface is too thick. The function of the multiple through holes on the powder pressing surface 8 is to make the gas flow smoothly.

Other structures of this embodiment are the same as those of embodiment 3.

Example 5

And a cushion pad 6 is arranged between the grain pressing ring 3 and the freely-filled grain 7. And the cushion pad 6 is fixed on the powder pressing surface 8 of the powder column pressing ring 3 by glue.

The buffer pad 6 is used for buffering the impact force between the grain pressing ring 3 and the freely-filled grain 7, and the material is industrial felt.

Other structures of this embodiment are the same as those of embodiment 1.

Example 6

The plug cover 4 is in threaded connection with the combustion chamber 5. The blocking cover 4 is fixedly connected with the combustion chamber 5 and plays a role in sealing the gas in the combustion chamber 5.

Other structures of this embodiment are the same as those of embodiment 1.

Example 7

The material of the pressing spring 2 is 65 Mn.

The 65Mn material has good elasticity and ablation resistance. The specification of the drug pressing spring 2 is designed according to the size of specific drug pressing force, such as the spring pitch diameter, the wire diameter, the length and the like.

Other structures of this embodiment are the same as those of embodiment 1.

A use method of a free-filling grain explosive-pressing structure of a solid rocket engine comprises the following steps:

s1) placing the drug pressing spring 2 in the catheter 1, pressing the drug pressing spring 2 by the drug column pressing ring 3, and installing the drug column pressing ring 3 on the catheter 1 to enable the drug column pressing ring 3 to move freely outside the catheter 1;

s2) screwing the guide tube 1 onto the central thread of the cap 4, and finally fixing the cap 4 to the front end of the engine combustion chamber 5 in which the freely packed grains 7 have been loaded.

Further, on the external screw thread with the internal thread screw in pipe 1 of medicine post clamping ring 3 in step 1, continue rotatory medicine post clamping ring 3 and make the internal thread release from the external screw thread, make the smooth surface of medicine post clamping ring 3 corresponding with external screw thread department, 3 covers of medicine post clamping ring can freely remove outside pipe 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.