CN112550553A

CN112550553A - Appearance-adjustable cavitator

Info

Publication number: CN112550553A
Application number: CN202011415265.XA
Authority: CN
Inventors: 洪军伟; 孟凡强; 金鑫; 许一楠; 刘艳; 吕沐辰
Original assignee: Hebei Hanguang Heavy Industry Ltd
Current assignee: Hebei Hanguang Heavy Industry Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-03-26

Abstract

The invention discloses a cavitator with an adjustable appearance. The cavitator comprises a front end plate, a shape adjusting mechanism and a rear end plate; the shape adjusting structure is clamped between the front end plate and the rear end plate; the appearance adjusting mechanism comprises a base, a telescopic mechanism and a plurality of appearance adjusting sectors; the shape adjusting sector is installed on the base through a telescopic mechanism and extends out of and retracts into the front end plate through the telescopic mechanism. The invention realizes the real-time control of the cavitation bubble form by changing the appearance of the cavitator, and greatly realizes the pitching and yawing control of the super-cavitation navigation body, so that the navigation body has the capability of fast steering.

Description

Appearance-adjustable cavitator

Technical Field

The invention relates to the technical field of hydrodynamics of underwater supercavitation navigation bodies, in particular to an appearance-adjustable cavitator arranged at the head of an underwater supercavitation moving body.

Background

When the navigation body moves underwater at a high speed, the pressure of a local area around the navigation body is lower than the saturated vapor pressure of water, so that the water is vaporized to generate bubbles, namely, a cavitation phenomenon is generated; when cavitation develops to a certain degree, a large bubble is formed around the navigation body to wrap the navigation body, which is a supercavitation phenomenon; at the moment, the frictional resistance of the navigation body can be greatly reduced, so that the speed of the underwater navigation body can be greatly improved; meanwhile, the fluid power and the moment borne by the navigation body are different from those of the conventional underwater navigation body, and the control difficulty of the navigation body is increased.

The cavitator is a component arranged at the head of the underwater supercavity moving body and has the functions of creating cavitation conditions and adjusting the cavitation state by generating desquamation turbulence to induce depressurization; the existence of the cavitator can make the moving body generate a supercavitation state more easily. Meanwhile, the pitching and yawing control of the navigation body can be realized by controlling the head cavitator.

The cavitation device mainly comprises a disc cavitation device and a cone cavitation device. Although the existing disc cavitators and cone cavitators can realize the pitching and yawing control of the navigation body by changing the attack angle of the cavitators, when the navigation body is maneuvered greatly, a part of the moving body is separated from the cavitation bubble wrapping, so that the navigation body resistance is increased sharply. The conventional cavitator can only realize maneuvering control on the navigation body in a very small range, the maneuverability of the navigation body is low, and the navigation body mostly adopts straight-flight ballistic navigation.

Disclosure of Invention

In view of the above, the invention provides a shape-adjustable cavitator, which can realize real-time control of the cavitation form by changing the shape of the cavitator, and greatly realize the pitch and yaw control of a super-cavitation navigation body, so that the navigation body has the capability of fast steering.

The appearance-adjustable cavitator comprises a cavitator main body and a water inlet pipeline; the cavitator is characterized in that the cavitator main body comprises a front end plate, a shape adjusting mechanism and a rear end plate; the shape adjusting structure is clamped between the front end plate and the rear end plate; the appearance adjusting mechanism comprises a base, a telescopic mechanism and a plurality of appearance adjusting sectors; the shape adjusting sector is installed on the base through a telescopic mechanism and extends out of and retracts into the front end plate through the telescopic mechanism.

Preferably, the profile adjustment mechanism comprises 4 identical profile adjustment sectors.

Preferably, the front end plate, the shape adjusting mechanism and the rear end plate are connected through threads.

Preferably, the front end of the water inlet pipeline is reduced.

Preferably, the telescopic mechanism adopts an actuating motor and a braking motor to realize the continuous movement of the shape adjusting sector.

Preferably, the shape adjusting mechanism further comprises a slide rail, and the shape adjusting sector moves on the slide rail.

Preferably, the front end plate and the rear end plate are disc-shaped.

Preferably, the rear end plate is connected with a pitch and yaw control device.

Has the advantages that:

(1) the cavitator consists of a front end plate, a shape adjusting mechanism and a rear end plate; when the moving body realizes the control of the projectile body by changing the inclination angle of the cavitator, the area of the cavitator is increased by the shape adjusting mechanism, so that the navigation body is completely wrapped by the cavitation bubbles, and a wetting area is not generated;

(2) the water inlet pipeline is arranged in the center of the disk of the cavitator, is a necking cylindrical pipeline, and can improve the water inflow under the condition of smaller water inlet area;

(3) the cavitation device is provided with a pitching and yawing control mechanism interface, and the integrated design of the cavitation device and the control mechanism can be realized through the interface, so that the pitching and yawing control of the navigation body can be realized.

Drawings

FIG. 1 is an overall structural view of a cavitator of the present invention;

FIG. 2 is a structural view of the cavitator profile adjusting mechanism 2 according to the present invention;

FIG. 3 is a view of the rear end plate 3 of the cavitator of the present invention;

fig. 4 is a structural view of the cavitator for pitch control of the cavitator of the present invention.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

The invention provides a cavitator with an adjustable appearance.

As shown in fig. 1, the cavitator body components include: a front end plate 1 of the cavitator, a shape adjusting mechanism 2, a rear end plate 3 of the cavitator and a water inlet pipeline 4. The rear end plate 3 may be followed by pitch and yaw control mechanisms.

The appearance adjusting structure 2 is clamped between the front end plate 1 and the rear end plate 3, and the front end plate 1, the appearance adjusting structure 2 and the rear end plate 3 are connected through threads.

The water inlet pipeline 4 is arranged at the center of the cavitator, the water inlet pipeline 4 is a cylindrical pipeline with a front end being in a necking shape, the water inlet pipeline 4 penetrates through the center of the cavitator and extends into the inside of the engine body, and outside water can enter a combustion chamber of the water ramjet engine through the water inlet pipeline 4 to serve as an engine oxidant. The water inlet pipeline 4 adopts a front end necking form, and can improve the water flow speed entering the water inlet, so that the water inflow is improved under a smaller water inlet area.

As shown in fig. 2, the profile adjustment mechanism 2 includes 4 profile adjustment sectors 21, a telescoping mechanism 22, a base 23, and 6 threaded openings therethrough. The telescopic mechanism comprises an actuating motor and a braking motor, and can realize continuous movement of the telescopic mechanism and accurate control of the area of the cavitator. The continuous movement of the telescopic mechanism can also be realized by adopting a slide rail form.

The rear end plate 3 includes 4 coupling holes 31, 6

fastening screw holes

32, and 1 spherical hole 33. The rear end plate 3 can be connected with a pitching and yawing control device; the pitch and yaw arrangements are connected to the rear end plate 3 by

holes

31, 32 and 33.

When the pitching and yawing mechanisms are used for pitching and yawing control, the area of the cavitator can be increased through the shape adjusting mechanism, the phenomenon that the cavitation body is wet can be avoided, and the supercavitation state is achieved. Referring to fig. 1, the cavitator profile remains unchanged as a disk cavitator when the aircraft is sailing straight. Referring to fig. 4, when the aerovane performs yaw control, the cavitation device is tilted back and forth by the yaw control mechanism to generate a yaw moment, thereby implementing the yaw control of the aerovane. At the moment, the sectional area of the cavitator relative to the incoming flow direction changes, the cavitation bubble form is changed, a wetting area possibly appears at the local part of the navigation body, the super-cavitation state cannot be achieved, and the navigation body resistance is also increased rapidly. When the navigation body performs yaw control, the telescopic mechanism 22 extends outwards to realize outward extension of the left and right telescopic sectors, and fig. 4 is a structural diagram of the cavitation device at a certain moment after the cavitation device extends when the navigation body performs yaw control.

The pitch control is similar to the yaw control and will not be described in detail here.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A shape-adjustable cavitator comprises a cavitator main body and a water inlet pipeline; the cavitator is characterized in that the cavitator main body comprises a front end plate (1), a shape adjusting mechanism (2) and a rear end plate (3); the shape adjusting structure (2) is clamped between the front end plate (1) and the rear end plate (3); the appearance adjusting mechanism (2) comprises a base (23), a telescopic mechanism (22) and a plurality of appearance adjusting sectors (21); the shape adjusting sector (21) is installed on the base (23) through a telescopic mechanism (22), and extends out of and retracts into the front end plate (1) through the telescopic mechanism (22).

2. The adjustable-profile cavitator of claim 1, wherein the profile-adjusting mechanism (24) comprises 4 identical profile-adjusting sectors.

3. The adjustable-profile cavitator according to claim 1 or 2, wherein the front end plate (1), the profile adjusting mechanism (2) and the rear end plate (3) are connected by screw threads.

4. The adjustable profile cavitator of claim 1, wherein the inlet conduit is necked down at a forward end thereof.

5. Cavitator with adjustable profile according to claim 1, characterized in that the telescopic mechanism (22) uses an actuator motor and a brake motor to achieve a continuous movement of the profile adjustment sector (21).

6. The adjustable-profile cavitator according to claim 1 or 5, wherein the profile-adjusting mechanism (2) further comprises a slide on which the profile-adjusting sector (21) moves.

7. The adjustable-profile cavitator according to claim 1, wherein the front end plate (1) and the rear end plate (3) are disc-shaped.

8. The adjustable-profile cavitator according to claim 1, wherein the rear end plate (3) is connected to pitch and yaw control means.