CN115924045A

CN115924045A - Double-spliced water jet propulsion inflow pipeline structure

Info

Publication number: CN115924045A
Application number: CN202211546535.XA
Authority: CN
Inventors: 刘建国; 汲国瑞; 王俊; 尹晓辉; 戴原星
Original assignee: 708th Research Institute of CSIC
Current assignee: 708th Research Institute of CSIC
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-04-07

Abstract

The invention relates to a double-spliced water jet propulsion inflow pipeline structure, which relates to the technical field of ship propulsion and the technical field of amphibious vehicle water propulsion, and comprises a public inflow seat, a first outflow bent pipe section and a second outflow bent pipe section; the common inflow base is arranged on the ship bottom plate/vehicle bottom plate, and a first outflow elbow pipe and a second outflow elbow pipe which are respectively and correspondingly connected with the first outflow elbow pipe and the second outflow elbow pipe are arranged on the common inflow base, so that a remote water flow enters the common inflow base along the ship bottom plate/vehicle bottom plate and is shunted to enter the first outflow elbow pipe and the second outflow elbow pipe. The invention enables each propeller to obtain undisturbed inflow, solves the problem that the operation performance of the water jet propeller is influenced because the axial distance between two devices is too small after two water jet propellers are arranged on a platform such as a thin ship body or an amphibious vehicle, and the like, and the inflow interference phenomena such as water robbery and the like during work are caused, and optimizes the application performance of the water jet propeller on the platform.

Description

Double-spliced water jet propulsion inflow pipeline structure

Technical Field

The invention relates to the technical field of ship propulsion and amphibious vehicle water propulsion, in particular to a double-spliced water jet propulsion inflow pipeline structure.

Background

As shown in fig. 1, the water jet propeller is composed of an inflow pipe, a propulsion pump, a nozzle, a shaft system, etc., the inflow pipe is also a core hydrodynamic component of the water jet propeller besides the propulsion pump, and the thrust performance of the water jet propeller is directly affected by the advantages and disadvantages of the inflow pipe design and the proper arrangement on the platform.

As shown in fig. 2, the current water jet propulsion technology is mainly applied to two types of platforms, namely high-speed surface ships and amphibious vehicles. Generally speaking, at least two water jet propellers are arranged side by side for each ship or each amphibious vehicle, and the axial distance between the two water jet propellers is not less than 1.8 times of the nominal diameter according to the recommendation of ITTC expert committee and international water jet propulsion manufacturers. If the water jet propulsion inflow pipeline is smaller than the value, the mutual interference between the two inflows can exist in the flow acquiring area near the joint part of the water jet propulsion inflow pipeline and the ship body/vehicle body, so that the smooth flowing of the inflows of the water jet propulsion system is influenced, and the propulsion performance of the water jet propulsion system is finally influenced.

If the ship body or the vehicle body is thin, such as an application platform of amphibious vehicles such as a small waterplane catamaran or a truck, and the like, if the double water jet propellers are arranged, the recommended minimum axial line distance requirement cannot be met in arrangement, and the flow rush phenomenon can occur in the two water jet propellers under the condition. As shown in fig. 3, the distance between the axes of the first water jet propeller and the second water jet propeller is small, and the flow acquiring area of the first water jet propeller and the flow acquiring area of the second water jet propeller have a crossing area, which is a water robbing area. The water snatching phenomenon can influence the application of the water jet propulsion technology on the platforms.

Disclosure of Invention

The purpose of the invention is: the utility model provides a double-pieced type water jet propulsion inflow pipeline structure to solve the flow interference problem that brings after platform such as thin hull or amphibious vehicle automobile body arranges two water jet propulsion wares.

In order to achieve the purpose, the technical scheme of the invention provides a double-spliced water jet propulsion inflow pipeline structure which comprises a common inflow seat, a first outflow bent pipe section and a second outflow bent pipe section; the utility model discloses a ship bottom plate/vehicle bottom plate, including first outflow elbow section, second outflow elbow section, public inflow seat is located bilge floor/vehicle bottom plate, be equipped with on the public inflow seat respectively with first outflow elbow section with the second outflow elbow section corresponds the first elbow pipe and the second outflow elbow pipe of effluenting that connect to make distant place rivers follow bilge floor/vehicle bottom plate gets into public inflow seat, the reposition of redundant personnel gets into first outflow elbow pipe with the second outflow elbow pipe.

Preferably, the upper outlets of the first outflow bend section and the second outflow bend section are connected with the guide vane body.

Preferably, a first sealing gasket and a second sealing gasket are correspondingly arranged between the outlets of the first outflow bent pipe section and the second outflow bent pipe section and the guide vane body.

Preferably, the outlets of the first outflow elbow section and the second outflow elbow section are connected with first fasteners corresponding to the guide vane bodies.

Preferably, the first fastener comprises an outer hexagonal bolt and a nut; first outflow elbow section with the second outflow elbow section is equipped with first outflow elbow flange and second outflow elbow flange respectively.

Preferably, the first outflow bent pipe section and the second outflow bent pipe section are correspondingly connected with the first outflow bent pipe section and the second outflow bent pipe section through second fasteners and plane sealant.

Preferably, the second fastening piece comprises an outer hexagon screw and a nut, and the first outflow elbow section and the second outflow elbow section are provided with first bolt holes corresponding to the outer hexagon screw.

Preferably, a third sealing gasket is arranged between the common inflow seat and the bottom plate/the bottom plate of the ship.

Preferably, the common inflow seat and the bottom plate/bottom plate of the ship are connected with a third fastening piece.

Preferably, the third fastener comprises an inner hexagon screw and a nut, and the common inflow base is provided with a second bolt hole corresponding to the inner hexagon screw.

In summary, the invention has the following beneficial technical effects:

1) The double-spliced water jet propulsion inflow pipeline structure can realize that each propeller obtains undisturbed ideal inflow, solves the problem of flow interference caused by arranging two water jet propellers on platforms such as a thin ship body or an amphibious vehicle body and the like, and further obtains ideal water jet propulsion performance.

2) The double-spliced water jet propulsion inflow pipeline structure adopts a sectional type connecting structure, the inflow section adopts a common inflow seat form, the lower end of the inflow section is connected with a ship body and a vehicle body, and the upper end of the inflow section is connected with an outflow pipe section of a flange inflow pipeline, so that the process realizability is good.

3) In the case of the water-jet propeller and the ship body/vehicle body made of different materials, the common inflow seat can be made of non-metallic materials, so that the problems of galvanic corrosion and the like caused by direct connection of the different materials are solved.

Drawings

FIG. 1 is a schematic diagram of a basic structure of a water jet propeller in the prior art;

FIG. 2 is a schematic diagram of a prior art for demonstrating the spacing requirement for the side-by-side arrangement of dual water jet propellers;

FIG. 3 is a schematic diagram showing an intersection region in the prior art;

FIG. 4 is a schematic structural view of a double-spliced water jet propulsion inflow pipeline structure according to the present invention;

FIG. 5 is a schematic structural diagram of a common inlet seat according to the present invention;

FIG. 6 is a schematic view of an outflow elbow of the present invention;

FIG. 7 is a schematic view of the streamline structure of the double-spliced water jet propulsion inflow pipeline according to the present invention;

FIG. 8 is a cross-sectional flow diagram of a double-spliced water jet propulsion inflow pipeline structure according to the present invention.

Reference numerals: 1. a spout; 2. a propulsion pump; 3. an inflow pipe; 4. a bearing housing; 5. a shaft system; 6. a hull/body; 7. a first water jet propeller; 8. a second water jet; 9. a flow acquisition zone of the first water jet propeller; 10. a flow acquisition zone of the second water jet propeller; 11. a crossover region; 12. a common inlet seat; 13. a first outflow bend section; 14. a second outflow bend section; 15. a first fastener; 16. a second fastener; 17. a third fastener; 18. a first gasket; 19. a second gasket; 20. a third seal gasket; 21. a connecting flange; 22. a first outflow elbow; 23. a second outflow elbow; 24. a first outflow elbow flange; 25. a second outlet elbow flange; 26. a first bolt hole; 27. a second bolt hole.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 4, the embodiment of the present invention discloses a double-split water jet propulsion inflow pipe structure, which mainly includes a common inflow seat 12, a first outflow elbow section 13, and a second outflow elbow section 14.

The common inflow seat 12 and the bottom plate/bottom plate of the ship are sealed by a third sealing gasket 20 and are connected through a third fastening piece 17 such as a hexagon socket head cap screw and a nut. The top of the common inlet 12 is provided with a first outlet elbow 22 and a second outlet elbow 23, which are connected to the first outlet elbow 13 and the second outlet elbow 14.

The outlets of the first outflow elbow section 13 and the second outflow elbow section 14 and the guide vane body are correspondingly sealed by a first sealing gasket 18 and a second sealing gasket 19, and are connected and fastened by a first fastening piece 15 such as an outer hexagon bolt and a nut through a first bolt hole 26.

The lower flanges of the first outflow elbow section 13 and the second outflow elbow section 14 are connected with the upper flange of the common inflow base 12 through second fasteners 16 such as outer hexagonal bolts and nuts, and the water tightness of the connection surfaces is guaranteed through plane sealant.

Fig. 6 is a schematic view of the common intake seat 12, and the connection flange 21 and the bottom plate/bottom plate of the ship are connected through the second bolt holes 27 by using the third fasteners 17. The remote water flow enters the common inlet 12 along the bottom plate/bottom plate of the ship and splits into a first outlet elbow 22 and a second outlet elbow 23.

Fig. 7 shows a first outflow elbow flange 24 and a second outflow elbow flange 25, which are respectively disposed on the top of the first outflow elbow 22 and the top of the second outflow elbow 23, and the water tightness between the two outflow elbow flanges and the guide vane body is ensured by a first sealing gasket 18 and a second sealing gasket 19, respectively. A first fastener 15 connects the flange of the outflow elbow to the guide vane body via a first bolt hole 26.

The flow chart of the double-spliced water jet propulsion inflow pipeline is shown in figure 8, and the double-spliced water jet propulsion inflow pipeline can effectively improve the phenomenon of flow robbing.

As shown in fig. 8, the first outlet elbow section 13 and the second outlet elbow section 14 of the double-split type water jet propulsion inlet pipe structure of the present invention not only have the common inlet seat 12, but also have the common fluid-capturing area. The water flow from a far place flows through the bottom of the ship/the vehicle and enters the common inflow seat 12, and then is divided into two inflow pipelines 3.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a two piece together formula water jet propulsion influent stream pipeline structure which characterized in that: comprises a common inflow seat (12), a first outflow elbow section (13) and a second outflow elbow section (14); the utility model discloses a ship bottom plate/vehicle bottom plate is located in public influent stream seat (12), be equipped with on public influent stream seat (12) respectively with first outflow bend section (13) with second outflow bend section (14) correspond first outflow return bend (22) and second outflow return bend (23) of connecting to make the distal water flow follow ship bottom plate/vehicle bottom plate gets into public influent stream seat (12), the reposition of redundant personnel gets into first outflow return bend (22) with second outflow return bend (23).

2. The double-spliced water jet propulsion inflow pipeline structure according to claim 1, wherein: the upper outlets of the first outflow bend section (13) and the second outflow bend section (14) are connected with the guide vane body.

3. The double-spliced water jet propulsion inflow pipeline structure according to claim 2, wherein: a first sealing gasket (18) and a second sealing gasket (19) are correspondingly arranged between the outlets of the first outflow bent pipe section (13) and the second outflow bent pipe section (14) and the guide vane bodies.

4. The double-spliced water jet propulsion inflow pipeline structure according to claim 3, wherein: outlets on the first outflow bent pipe section (13) and the second outflow bent pipe section (14) are connected with first fasteners (15) corresponding to the guide vane bodies.

5. The double-spliced water jet propulsion inflow pipeline structure according to claim 4, wherein: the first fastener (15) comprises an outer hexagonal bolt and a nut; first outflow bend section (13) with second outflow bend section (14) are equipped with first outflow bend flange (24) and second outflow bend flange (25) respectively.

6. The double-spliced water jet propulsion inflow pipeline structure according to claim 5, characterized in that: the first outflow bent pipe section (13) and the second outflow bent pipe section (14) are connected with the upper flange of the first outflow bent pipe (22) and the upper flange of the second outflow bent pipe (23) through a second fastener (16) and a plane sealant.

7. The double-spliced water jet propulsion inflow pipeline structure according to claim 6, wherein: the second fastening piece (16) comprises an outer hexagon screw and a nut, and the first outflow elbow section (13) and the second outflow elbow section (14) are provided with first bolt holes (26) corresponding to the outer hexagon screws.

8. The double-spliced water jet propulsion inflow pipe structure according to claim 7, wherein: and a third sealing gasket (20) is arranged between the common inflow seat (12) and the bottom plate/vehicle bottom plate of the ship.

9. The double-spliced water jet propulsion inflow pipe structure according to claim 8, wherein: and the common inflow base (12) and the bottom plate/vehicle bottom plate are connected with a third fastening piece (17).

10. The double-spliced water jet propulsion inflow pipe structure according to claim 9, wherein: the third fastener (17) comprises an inner hexagon screw and a nut, and the common inflow base (12) is provided with a second bolt hole (27) corresponding to the inner hexagon screw.