阅读说明：本技术 一种用于水下艇速发射的高压室结构及设计方法 (High-pressure chamber structure for underwater boat speed launching and design method ) 是由 施瑶 潘光 问昕 高山 华扬 黄桥高 宋保维 于 2021-07-21 设计创作，主要内容包括：本发明提出一种用于水下艇速发射的高压室结构及设计方法,对高压室的外部型线将传统的圆柱形外壳改为水滴型结构,使得高压室在较深的水下试验时,水压力不会造成高压室变形,从而不会影响空化过程中空泡的形状。此外在水下水平运动中,本发明的高压室结构不会产生较大的兴波阻力,不会影响航行体的水平运动速度,降低了水下发射平台运动所消耗的能耗。同时本发明提出的高压室结构的设计方法,操作实施简单,为本发明的高压室外形结构的可实施性提供了基础。本发明满足了水下发射的技术需求,提高实验的精度与降低实验的能耗,既可以保护水下发射平台有较好的低能耗,又可以保证气罐在水下较深处,压力较大时,不会发生较大的变形。(The invention provides a high-pressure chamber structure for underwater boat speed launching and a design method thereof, wherein the external molded line of the high-pressure chamber is changed into a water drop type structure from a traditional cylindrical shell, so that the water pressure of the high-pressure chamber can not cause the deformation of the high-pressure chamber during a deeper underwater test, and the shape of a cavity in a cavitation process can not be influenced. In addition, in underwater horizontal movement, the high-pressure chamber structure of the invention can not generate larger wave-making resistance, can not influence the horizontal movement speed of the navigation body, and reduces the energy consumption consumed by the movement of the underwater launching platform. Meanwhile, the design method of the high-pressure chamber structure provided by the invention is simple to operate and implement, and provides a foundation for the implementability of the high-pressure chamber external structure. The invention meets the technical requirements of underwater launching, improves the precision of the experiment and reduces the energy consumption of the experiment, thereby not only protecting the underwater launching platform from having better low energy consumption, but also ensuring that the gas tank can not generate larger deformation when the pressure is larger at a deeper position underwater.)

1. A high-pressure chamber structure for underwater boat speed launching is characterized in that the high-pressure chamber is divided into a left shell and a right shell, and the whole shell is of a water drop shape after assembly;

the shell is divided into a high-pressure chamber outer-shaped top part, a high-pressure chamber outer-shaped middle section and a high-pressure chamber outer-shaped tail part, wherein the inner diameter of the high-pressure chamber outer-shaped top part is smaller than the inner diameter of the high-pressure chamber outer-shaped tail part; a connecting device is arranged on the middle section surface of the high-pressure chamber and is used for connecting the launching platform; the connecting device is provided with a through hole penetrating through the inner cavity of the shell;

and a gas tank is arranged in the shell, and high-pressure gas in the gas tank flows out of the connecting device through the gas outlet pipe.

2. The structure of high pressure chamber for underwater boat speed launch according to claim 1, wherein the left and right housings are fixedly connected by screw threads.

3. A high pressure chamber structure for underwater boat speed launch according to claim 1 wherein the gas tank is secured within the housing by a support bracket.

4. The structure of claim 1, wherein the housing is made of pressure-resistant plastic.

5. A method of designing a high pressure chamber structure for submarine speed launch according to claim 1, comprising the steps of:

step 1: the geometry of the appearance of the high-pressure chamber is designed into a plane shape;

step 2: the high-pressure chamber outer shape design comprises eight control points in total, and the profile of the plane shape can be obtained by connecting the coordinates of the given control points. The control points are respectively as follows: a leading bessel starting point A1, a leading bessel control point A2, a leading bessel control point A3, a leading bessel termination point A4, a middle straight line termination point A5, a trailing bessel control point A6, a trailing bessel control point A7 and a trailing bessel termination point A8;

and step 3: the plane appearance of the high-pressure chamber is divided into a front-end Bezier curve, a middle-end straight line and a rear-end Bezier curve along the length direction. The front end Bezier curve comprises four control points, the range of the front end is the first third of the total length, a cubic Bezier curve is obtained by coordinate values of the four control points, and the coordinates of the four control points are respectively A1(0,0), A2(2L/175, H/9), A3(15L/175,8H/9), A4(25L/175, H) and L, H respectively represent the maximum length and the maximum height of the appearance; wherein the back-end Bezier curve ranges from one half of the total length to the tail part and comprises four

The coordinates of the four control points are respectively as follows:

A5(75L/175,H),A6(95L/175,8H/9),A7(125L/175,7H/9),A8(0,H/9)

l, H representing the maximum length and height of the shape respectively, and obtaining cubic Bezier curve from coordinate values of four control points; the middle straight line transition line is formed by connecting the end point of the bezier curve at the front end with the start point of the bezier curve at the tail end to form a primary straight line;

and 4, step 4: the three obtained curves are brought into a plane shape coordinate system of the high-pressure chamber, and are connected with each other to form a complete upper plane shape of the high-pressure chamber;

and 5: the X axis is taken as a symmetrical line, so that all high-compaction plane shapes are generated, and the local appearance is modified;

step 6: the planar shape is rotated with respect to the X-axis to produce a complete high pressure chamber exterior shape.

Technical Field

The invention belongs to the field of mechanical application, and particularly relates to a high-pressure chamber structure for underwater boat speed launching and a design method.

Background

The underwater vertical launching technology of the navigation body is a general component of ocean power in China. The underwater vertical launching technology of the navigation body not only can play a role of hiding, but also has extremely high display application value. The underwater vertical launching technology of the navigation body is a gas-liquid-solid three-phase coupling mechanical process, and has great difficulty in theoretical analysis. The underwater vertical launching technology of the navigation body relates to three stages, namely a cylinder outlet stage, an underwater navigation stage and a water outlet stage of the navigation body. The cavitation phenomena are generated in the three stages, and cavitation bubbles generated in the cavitation process have obvious influence on the navigation attitude, the structural vibration and the like of the navigation body. Therefore, in order to study the cavitation process and the influence of cavitation, experimental study of underwater vertical launch was performed.

The cavitation process and the generation of the size of the cavitation bubbles are sensitive to the underwater speed of the navigation body, so in the design process of an experimental device for underwater vertical launching of the navigation body, the underwater speed of the navigation body is controlled in an experiment, and the underwater speed of the navigation body is mainly provided by high-pressure gas in a high-pressure gas chamber. The outer profile of the high-pressure chamber plays a crucial role when the aircraft is moving. The appearance of the existing high-pressure chamber adopts the traditional cylindrical shell, and the high-pressure chamber is forced to deform by larger water pressure during an underwater deeper experiment by the method, so that the air pressure required by the experiment is forced to change, and the cavitation process and the shape of cavitation bubbles are influenced. In addition, the traditional high-pressure chambers are cylindrical, and can generate great wave-making resistance in underwater horizontal movement, so that the horizontal movement speed of the navigation body is influenced, and the energy consumption consumed by the movement of the underwater launching platform is greatly increased.

Disclosure of Invention

The technical problem solved by the invention is as follows: in order to meet the technical requirement of underwater launching, the precision of the experiment is improved and the energy consumption of the experiment is reduced. The invention provides a high-pressure chamber structure for underwater boat speed launching and a design method thereof, which can not only protect an underwater launching platform from having better low energy consumption, but also ensure that a gas tank is deeper underwater and cannot deform greatly when the pressure is higher.

The technical scheme of the invention is as follows: a high-pressure chamber structure for underwater boat speed launching is characterized in that the high-pressure chamber is divided into a left shell and a right shell, and the whole shell is of a water drop shape after assembly;

the shell is divided into a high-pressure chamber outer-shaped top part, a high-pressure chamber outer-shaped middle section and a high-pressure chamber outer-shaped tail part, wherein the inner diameter of the high-pressure chamber outer-shaped top part is smaller than the inner diameter of the high-pressure chamber outer-shaped tail part; a connecting device is arranged on the middle section surface of the high-pressure chamber and is used for connecting the launching platform; the connecting device is provided with a through hole penetrating through the inner cavity of the shell;

and a gas tank is arranged in the shell, and high-pressure gas in the gas tank flows out of the connecting device through the gas outlet pipe.

The further technical scheme of the invention is as follows: the left shell and the right shell are fixedly connected through threads.

The further technical scheme of the invention is as follows: the gas tank is fixed in the shell through a support frame.

The further technical scheme of the invention is as follows: the shell is made of pressure-resistant plastic.

The further technical scheme of the invention is as follows: a design method of a high-pressure chamber structure for underwater boat speed launching is characterized by comprising the following steps:

step 1: the geometry of the appearance of the high-pressure chamber is designed into a plane shape;

step 2: the high-pressure chamber outer shape design comprises eight control points in total, and the profile of the plane shape can be obtained by connecting the coordinates of the given control points. The control points are respectively as follows: a leading bessel starting point A1, a leading bessel control point A2, a leading bessel control point A3, a leading bessel termination point A4, a middle straight line termination point A5, a trailing bessel control point A6, a trailing bessel control point A7 and a trailing bessel termination point A8;

and step 3: the plane appearance of the high-pressure chamber is divided into a front-end Bezier curve, a middle-end straight line and a rear-end Bezier curve along the length direction. The front end Bezier curve comprises four control points, the range of the front end is the first third of the total length, a cubic Bezier curve is obtained by coordinate values of the four control points, and the coordinates of the four control points are respectively A1(0,0), A2(2L/175, H/9), A3(15L/175,8H/9), A4(25L/175, H) and L, H respectively represent the maximum length and the maximum height of the appearance; the range of the back-end Bezier curve is from one half of the total length to the tail, and the back-end Bezier curve comprises four control points, and the coordinates of the four control points are respectively as follows:

A5(75L/175,H),A6(95L/175,8H/9),A7(125L/175,7H/9),A8(0,H/9)

l, H representing the maximum length and height of the shape respectively, and obtaining cubic Bezier curve from coordinate values of four control points; the middle straight line transition line is formed by connecting the end point of the bezier curve at the front end with the start point of the bezier curve at the tail end to form a primary straight line;

and 4, step 4: the three obtained curves are brought into a plane shape coordinate system of the high-pressure chamber, and are connected with each other to form a complete upper plane shape of the high-pressure chamber;

and 5: the X axis is taken as a symmetrical line, so that all high-compaction plane shapes are generated, and the local appearance is modified;

step 6: the planar shape is rotated with respect to the X-axis to produce a complete high pressure chamber exterior shape.

Effects of the invention

The invention has the technical effects that: according to the invention, the traditional cylindrical shell is changed into a water drop structure for the external molded line of the high-pressure chamber, so that the water pressure can not cause the deformation of the high-pressure chamber when the high-pressure chamber is tested in a deeper underwater environment, and the shape of cavitation bubbles in the cavitation process can not be influenced. In addition, in underwater horizontal movement, the high-pressure chamber structure of the invention can not generate larger wave-making resistance, can not influence the horizontal movement speed of the navigation body, and reduces the energy consumption consumed by the movement of the underwater launching platform. Meanwhile, the design method of the high-pressure chamber structure provided by the invention is simple to operate and implement, and provides a foundation for the implementability of the high-pressure chamber external structure. The invention meets the technical requirements of underwater launching, improves the precision of the experiment and reduces the energy consumption of the experiment, thereby not only protecting the underwater launching platform from having better low energy consumption, but also ensuring that the gas tank can not generate larger deformation when the pressure is larger at a deeper position underwater.

Drawings

FIG. 1 high pressure chamber exterior plan view

FIG. 2 is a right half structure of a high pressure chamber

FIG. 3 left half structure of high pressure chamber

FIG. 4 is a cross-sectional view of an internal plate of a high pressure chamber

FIG. 5 general assembly schematic

Description of reference numerals: 1-assembling a threaded hole; 2-a connecting means; 3-assembling holes; 4-surface profile; 5-inside the gas tank; 6-high pressure chamber external tail; 7-high pressure chamber external top; 8-a support frame; 9-left half of high pressure chamber; 10-high pressure chamber right half type.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Referring to fig. 1 to 5, in order to achieve the above-mentioned object, the structural shape of the high pressure chamber is designed to be a water drop type structure, which is divided into a left housing and a right housing, and assembled by screws. The water drop type design means that the front end of the shell is a hemispherical bulge, the middle part of the shell is a cylinder with gradually reduced radius, and a circular opening for installing an air hose is reserved at the closed tail part with a semicircular tail part. The support frame is designed in the interior of the appearance, and the support frame is well matched with the high-pressure chamber, so that the high-pressure chamber is well matched with the appearance.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Firstly, the geometric design of the appearance of the high-pressure chamber is mainly a plane shape.

And step two, the shape design of the high-pressure chamber comprises eight control points in total, and the molded lines in the shape of a plane can be obtained by connecting the coordinates of the given control points. The control points are respectively as follows: a leading bessel starting point a1, a leading bessel control point a2, a leading bessel control point A3, a leading bessel termination point a4, a middle straight line termination point a5, a trailing bessel control point a6, a trailing bessel control point a7, and a trailing bessel termination point A8.

And step three, dividing the plane appearance of the high-pressure chamber into a front-end Bezier curve, a middle-end straight line and a rear-end Bezier curve along the length direction. The front end Bezier curve comprises four control points, the range of the front end is the first third of the total length, a cubic Bezier curve is obtained by coordinate values of the four control points, and the coordinates of the four control points are respectively A1(0,0), A2(2L/175, H/9), A3(15L/175,8H/9), A4(25L/175, H) and L, H respectively represent the maximum length and the maximum height of the appearance; wherein the range of the back-end Bezier curve is from one half of the total length to the tail part, the back-end Bezier curve comprises four control points, and the coordinates of the four control points are respectively

A5(75L/175, H), A6(95L/175,8H/9), A7(125L/175,7H/9), A8(0, H/9), L, H respectively represent the maximum length and the maximum height of the outer shape, and a cubic Bezier curve is obtained by coordinate values of four control points; the middle straight line transition line is formed by connecting the end point of the bezier curve at the front end with the start point of the bezier curve at the tail end to form a primary straight line.

And step four, bringing the obtained three curves into a plane shape coordinate system of the high-pressure chamber, and connecting the curves to form a complete upper plane shape of the high-pressure chamber.

And step five, taking the X axis as a symmetrical line, generating a whole high-compaction plane shape, and modifying the local shape.

And step six, taking the X axis as a reference, and rotating the plane shape to generate a complete high-pressure chamber outer shape.