阅读说明：本技术 一种利于全轴摆动喷管摆动的渐变式间隙结构 (Gradual change type gap structure beneficial to swinging of full-axis swinging spray pipe ) 是由 刘小平 崔建伟 韩小波 黎明 周文清 成建壮 闫铮 于 2019-10-12 设计创作，主要内容包括：本发明涉及固体火箭发动机全轴摆动喷管摆动的间隙结构,具体涉及一种利于全轴摆动喷管摆动的渐变式间隙结构。包括喷管活动体,喷管固定体,所述喷管活动体与固定体球窝结构连接,所述喷管活动体绕摆动球心做全轴摆动,所述喷管固定体为喷管活动体提供承载作用。活动体前缘球面与活动体后缘球面平滑过渡连接,活动体前缘球面与固定体球面间产生的间隙结构即为渐变式间隙,从喷管入口到喷管出口方向间隙宽度逐渐变小,渐变式间隙内填充具有抗烧蚀特性的膏状密封腻子,有效地解决喷管活动体摆动过程中狭小的间隙内出现燃气粒子沉积和材料热膨胀使摆动卡阻的现象,这种渐变式间隙结构设计方法有利于全轴摆动喷管的稳定工作。(The invention relates to a clearance structure for swinging of a full-axis swinging spray pipe of a solid rocket engine, in particular to a gradual change type clearance structure beneficial to swinging of the full-axis swinging spray pipe. The spray pipe moving body is connected with a ball socket structure of the fixed body, the spray pipe moving body swings around a swing spherical center in a full-axis mode, and the spray pipe fixed body provides a bearing effect for the spray pipe moving body. The spherical surface of the front edge of the movable body is in smooth transition connection with the spherical surface of the rear edge of the movable body, a gap structure generated between the spherical surface of the front edge of the movable body and the spherical surface of the fixed body is a gradual change type gap, the width of the gap is gradually reduced from the inlet of the spray pipe to the outlet of the spray pipe, and paste sealing putty with anti-ablation characteristics is filled in the gradual change type gap, so that the phenomenon that gas particles are deposited and the material is thermally expanded to cause swinging blockage in the narrow gap in the swinging process of the movable body of the spray pipe is effectively solved, and the design method of the gradual change type gap structure is favorable for stable.)

1. The utility model provides a do benefit to wobbling gradual change formula clearance structure of spray tube which characterized in that: including the spray tube movable body, the spray tube fixed body, the spray tube movable body passes through ball socket structural connection with the spray tube fixed body, the spray tube movable body is the movable part of full axle swing spray tube, can do the full axle swing around the swing centre of sphere, the spray tube fixed body is the fixed part of full axle swing spray tube, bears for the spray tube movable body provides.

2. The structure of claim 1, wherein the structure of the tapered gap facilitates oscillation of the nozzle by: the movable jet pipe body and the fixed jet pipe body are both rotary bodies, the axes of the two parts are overlapped, the two parts are matched and connected through two spherical surfaces with the same spherical diameter, and the spherical centers of the two parts are overlapped.

3. The structure of claim 1, wherein the structure of the tapered gap facilitates oscillation of the nozzle by: the movable jet pipe body swings around the fixed jet pipe body in 360 degrees and the spherical gap is a gradually changing gap.

4. The structure of claim 3, wherein: the gradual change type gap is filled with paste sealing putty with ablation resistance.

Technical Field

The invention relates to a clearance structure for swinging of a full-axis swinging spray pipe of a solid rocket engine to realize thrust vector change, in particular to a gradual change type clearance structure beneficial to swinging of the full-axis swinging spray pipe.

Background

During the flying process of rockets or missiles, thrust vector control is often required to be carried out on solid rocket engines so as to correct the flight trajectory of the rocket body and maintain the posture of the rocket body stable. In the working process of the solid rocket engine, thrust vector change is generally realized by the real-time following instruction swing of the full-axis swing spray pipe. Limited by the overall structure size of the rocket or missile, the solid rocket engine full-axis swinging nozzle often needs to be submerged into a combustion chamber, so that the full-axis swinging nozzle swinging structure is directly positioned in a high-temperature high-pressure gas heat environment. The full-axis swinging spray pipe consists of a movable body and a fixed body which are connected through a ball socket structure, and the movable body can realize full-axis swinging around a spherical center. Usually, a ball socket structure with narrow and small equal gaps is adopted between the movable body and the fixed body, the gap structure at the swinging part directly faces to the high-temperature and high-pressure gas particle scouring, the phenomena of gas particle deposition, material thermal expansion, swinging blockage and the like easily occur in the narrow and small gaps in the swinging process of the movable body, and the factors are not beneficial to the swinging of the full-axis swinging spray pipe in the working process.

Disclosure of Invention

Problems to be solved by the invention

The invention provides a gradual change type gap structure beneficial to swinging of a full-axis swinging spray pipe, which aims to solve the problem that the spray pipe is unsmooth in swinging or blocked due to deposition or thermal expansion deformation of narrow and equal-gap spherical gas particles between a movable body and a fixed body of the full-axis swinging spray pipe of a solid rocket engine.

The technical scheme adopted by the invention

The utility model provides a do benefit to wobbling gradual change formula clearance structure of spray tube, includes the spray tube movable body, the spray tube fixed body, the spray tube movable body passes through ball socket structural connection with the spray tube fixed body, the spray tube movable body is the movable part of full axle swing spray tube, can do the full axle swing around the swing centre of sphere, the spray tube fixed body is the fixed part of full axle swing spray tube, bears for the spray tube movable body provides.

Furthermore, the movable nozzle body and the fixed nozzle body are both rotary bodies, the axes of the two parts are overlapped, the two parts are matched and connected through two spherical surfaces with the same spherical diameter, and the spherical centers of the two parts are overlapped.

Furthermore, the movable nozzle body swings around the fixed nozzle body in a 360-degree full-axis manner, and the spherical clearance is a gradual-changing clearance.

Furthermore, the gradual change type gap is filled with paste sealing putty with ablation resistance.

Advantageous effects

The design method of the gradient gap structure is simple and easy to realize, the swinging blockage caused by the deformation of the swinging gap due to the thermal expansion of materials in a high-temperature environment can be avoided, and the swinging damping can be prevented from being increased due to the deposition of fuel gas particles by filling the dynamic sealing putty in the gradient gap.

Drawings

FIG. 1 is a diagram of a progressive gap configuration of the oscillation of a full-axis oscillating nozzle;

wherein: 1. the spray pipe comprises a spray pipe movable body, 2 parts of a spray pipe fixed body, 3 parts of a movable body spherical center, 4 parts of a fixed body spherical center, 5 parts of a gradual gap, 6 parts of a movable body front edge spherical surface and 7 parts of a movable body rear edge spherical surface.

Detailed Description

The following detailed description of specific embodiments is provided in conjunction with the accompanying drawings

Inventive example 1

As shown in fig. 1, a gradual gap structure beneficial to swinging of a full-axis swinging nozzle comprises a movable nozzle body and a fixed nozzle body, wherein the movable nozzle body is a movable part of the full-axis swinging nozzle, and the movable nozzle body 1 and the fixed nozzle body 2 are both rotary bodies and have overlapped axes. The two parts are matched and connected through two spherical surfaces with the same spherical diameter, and the spherical centers of the two parts are superposed, namely the spherical center of the movable body and the spherical center of the fixed body are superposed at the position of the swing spherical center 3. The movable nozzle body 1 can swing in the full axial direction of 360 degrees around the swing spherical center 3. The processing tolerance of the movable nozzle body 1 and the fixed nozzle body 2 is controlled, so that a swinging structure formed by matching and connecting two spherical surfaces can be a narrow and uniform-gap ball socket structure. The movable body spherical surface located before the position of the swing center 3 is referred to as a movable body leading edge spherical surface 6, and the movable body spherical surface located after the position of the swing center 3 is referred to as a movable body trailing edge spherical surface 7. Without changing the sphere diameter of the nozzle movable body 1, the position of the sphere center of the movable body front edge spherical surface 6 on the axis is deviated from the position of the swing sphere center 3 backward by a certain distance to form a movable body front edge sphere center 4, and simultaneously, the movable body front edge spherical surface 6 is connected with the movable body rear edge spherical surface 7 in a smooth transition manner. At this time, the gap structure generated between the front edge spherical surface 6 of the movable body and the spherical surface of the fixed body is a gradual change type gap 5, and the gap width gradually decreases from the nozzle inlet to the nozzle outlet. The gradual change type gap is filled with pasty dynamic sealing putty with ablation resistance, so that the gap structure can be effectively protected from being washed by high-temperature and high-speed gas in the working process of the full-axis swinging spray pipe, and the generation of deposition of gas particles can be prevented.

Inventive example 2

As shown in fig. 1, a gradual gap structure for facilitating the swinging of a full-axis swinging nozzle comprises a movable nozzle body and a fixed nozzle body, which are the same as those of embodiment 1, and gradual gap fillers are also the same. The fixed body spherical surface after this position is referred to as a fixed body trailing edge spherical surface. The sphere diameter of the nozzle fixing body 2 is not changed, the position of the sphere center of the front edge sphere of the fixing body on the axis is forwards deviated from the position of the swing sphere center 3 by a certain distance to form the front edge sphere center of the fixing body, and meanwhile, the front edge sphere of the fixing body is smoothly connected with the rear edge sphere of the fixing body in a transition mode. At this time, the gap structure generated between the spherical surface of the front edge of the fixed body and the spherical surface of the movable body is a gradual change type gap 5, and the gap width gradually decreases from the inlet of the spray pipe to the outlet of the spray pipe.